CN216745612U - Narrow-distance four-hole type parallel flow heat exchange aluminum flat tube - Google Patents
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- CN216745612U CN216745612U CN202123394636.3U CN202123394636U CN216745612U CN 216745612 U CN216745612 U CN 216745612U CN 202123394636 U CN202123394636 U CN 202123394636U CN 216745612 U CN216745612 U CN 216745612U
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Abstract
The invention discloses a narrow-distance four-hole type parallel flow heat exchange aluminum flat tube, wherein the section of an aluminum flat tube body along the width direction is in an oblong shape, and a first flow through hole and a second flow through hole are formed in the aluminum flat tube body; the first flow through hole is in an annular shape formed by connecting a first line segment, a second line segment, a first corrugated line, a second corrugated line, a third corrugated line and a third line segment end to end, the second line segment and the third line segment are parallel to the upper surface of the aluminum flat tube body, the first line segment is vertically connected with the second line segment and the third line segment, the second corrugated line is bent in an arc shape, and the second corrugated line is concentric with an arc on the side edge of the aluminum flat tube body; the cross-sectional shape of the second flow through hole is a second rectangle, four corners of the second rectangle are provided with first transition fillets, and the side of the second rectangle, which is parallel to the upper surface of the aluminum flat tube, is provided with a fourth line segment, a fourth corrugated line and a fifth line segment. The section shape of the micro-channel aluminum flat tube is optimized, the existing extrusion process conditions are matched, the yield is improved, the production cost is reduced, and the harsh use requirements of special environments are met to the maximum extent.
Description
Technical Field
The invention belongs to the technical field of heat exchange aluminum flat tubes, and particularly relates to a narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube.
Background
The micro-channel aluminum flat tube is a thin-wall porous flat tubular material which is subjected to surface zinc spraying and corrosion prevention treatment by adopting a refined aluminum bar and hot extrusion, is mainly applied to an air conditioning system as a pipeline part bearing a novel environment-friendly refrigerant, and is internally provided with a channel for circulating the refrigerant so as to enable the refrigerant to circulate in the air conditioning system or a heat exchange device, thereby playing a role in heat exchange. The micro-channel aluminum flat tube is an important component which directly influences the effect of the air-conditioning heat exchanger. In recent years, domestic enterprises continuously and deeply research and develop the technology of the micro-channel aluminum flat tubes, a large number of domestic micro-channel aluminum flat tubes are put on the market, and the cross-sectional structures of a plurality of micro-channel aluminum flat tubes are known to the public and technical personnel in the form of patent documents.
For example, chinese patent application No. CN201920683219.4, application No. 2019.05.14, publication No. CN210035817U, and publication No. 2020.02.07, disclose an oil-cooled aluminum flat tube, which comprises a flat tube main body, a thick-wall block, a plurality of partition plates, a plurality of heat dissipation plates, and an oil port; the thick-wall block is connected with the interior of the flat tube main body; the oil port penetrates through the thick-wall block; the plurality of partition plates are inserted into the flat pipe main body to partition the interior of the flat pipe main body into a plurality of heat dissipation holes; and a plurality of heat dissipation plates are distributed and connected around the inside of the heat dissipation holes.
For another example, chinese patent application, application No. CN201220341139.9, application date 2012.07.16, publication No. CN202709840U, and publication No. 2013.01.30 disclose a porous microchannel aluminum flat tube, wherein, the aluminum flat tube includes an aluminum tube body whose outer surface is coated with a zinc layer, a through hole is formed in the aluminum tube body, and inner teeth are formed on the inner wall of the through hole.
For another example, chinese patent application No. CN200820221001.9, application No. 2008.11.17, publication No. CN201318900, and publication No. 2009.09.30, disclose an aluminum flat tube, which comprises a flow channel hole in a tube body, wherein the cross section of the flow channel hole is rectangular, and a protrusion or a groove is provided on the inner wall of the hole.
According to the technical scheme, the channels for the circulation of the refrigerant are arranged in the micro-channel aluminum flat tubes, so that the refrigerant circulates in an air conditioning system or a heat exchange device, and the heat exchange effect is achieved. Beneficial attempts are made to improve the heat exchange efficiency of the micro-channel aluminum flat tube from the angle of increasing the heat exchange area. However, because of high technical content and great production difficulty, the micro-channel aluminum flat tube product is required to meet the requirements of air conditioner products under the environment with higher and higher requirements on the performance and service life of the air conditioner products, not only the cross section shape of the product is required, but also the yield of the micro-channel aluminum flat tube is comprehensively considered.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems that in the prior art, due to the limitation of an extrusion process and raw materials, a micro-channel aluminum flat tube product with any size and any cross section shape cannot be produced in a shaping mode, the rejection rate is high, the manufacturing cost is high, a finished product cannot meet the harsh use requirement of a special environment and the like, the invention aims to provide the narrow-distance four-hole type parallel flow heat exchange aluminum flat tube, the cross section shape design of the micro-channel aluminum flat tube is optimized, the existing extrusion process conditions are matched, the yield is improved, the rejection rate is reduced, the production cost is reduced, the harsh use requirement of the special environment is met to the maximum extent, and certain market competitiveness is achieved.
2. Technical scheme
In order to achieve the purpose and achieve the technical effect, the invention adopts the following technical scheme:
a narrow-distance four-hole type parallel flow heat exchange aluminum flat tube comprises an aluminum flat tube body, wherein the section of the aluminum flat tube body in the width direction is in an oblong shape, a first flow through hole and a second flow through hole are formed in the aluminum flat tube body, the aluminum flat tube is characterized in that the first flow through hole is respectively arranged on two sides of the aluminum flat tube body in the width direction, the first flow through hole is formed between the two first flow through holes, the second flow through hole is formed in two numbers, a first partition is arranged between the first flow through hole and the second flow through hole, and a second partition is arranged between the two second flow through holes; the first flow through hole is an annular shape formed by sequentially connecting a first line segment, a second line segment, a first corrugated line, a second corrugated line, a third corrugated line and a third line segment end to end, the second line segment and the third line segment are parallel to the upper surface of the aluminum flat tube body, the first line segment is vertically connected with the second line segment and the third line segment, the first corrugated line and the third corrugated line are parallel, the second corrugated line is bent in an arc shape, the second corrugated line is concentric with a side arc of the aluminum flat tube body in the width direction, and the first line segment is arranged on one side of the side arc far away from the aluminum flat tube body in the width direction; the cross-sectional shape of the second flow through hole is a second rectangle, four corners of the second rectangle are provided with first transition fillets, and the side of the second rectangle, which is parallel to the upper surface/lower surface of the aluminum flat tube, is provided with a fourth line segment, a fourth corrugated line and a fifth line segment which are sequentially connected.
Furthermore, the first corrugated line and the third corrugated line are symmetrically arranged on two sides of the first line segment, a plurality of first grooves and first bulges are arranged on the first corrugated line at intervals, the first grooves and the first bulges are semicircular, and the first bulges are arranged on an extension line of the second line segment.
Furthermore, a plurality of second bulges which are sequentially connected are arranged on the second corrugated line at intervals, the second bulges are semicircular, and circle center connecting lines of the plurality of second bulges are circular arcs concentric with the side arcs.
Furthermore, a plurality of third grooves and third protrusions are arranged on the fourth corrugated line at intervals, the third grooves and the third protrusions are both semicircular, and the vertex of each third protrusion is located on the connection line of the first line segment and the second line segment.
Further, the width of the first partition and the width of the second partition are the same.
Further, a second transition fillet is arranged at the joint of the first line segment, the second line segment and the third line segment.
Further, the height of the section of the flat aluminum pipe body in the width direction is 3 +/-0.06 mm, and the width is 16 +/-0.05 mm; the width of the first partition is 0.5 +/-0.05 mm.
Furthermore, the outer surface of the aluminum flat tube body is provided with a zinc spraying coating.
Further, the zinc spraying amount of the zinc spraying coating is 8 +/-2 g/m2And the weight of the aluminum flat pipe body is 63 × 3 g/m.
Furthermore, the tensile strength of the narrow-distance four-hole type parallel flow heat exchange aluminum flat tube is more than or equal to 75MPa, the yield strength is more than or equal to 20MPa, and the elongation is more than or equal to 25%.
The extrusion die is arranged in an extruder, and is subjected to extrusion forming, surface zinc spraying and corrosion prevention treatment and cooling on a refined aluminum bar to obtain the narrow-distance four-hole type parallel flow heat exchange aluminum flat tube, and the flat tube is straightened and cut to length to finally obtain the micro-channel aluminum flat tube applied to an air conditioning system, wherein the surface of the aluminum flat tube body has no obvious flow mark, bump, air hole, slag inclusion and crack defects, and the inner surface has no scratch and indentation defects; the notch has no burr, and the inner part and the outer part of the aluminum flat tube are clean and have no burr.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that: four circulation holes in the cross section shape of the aluminum flat tube body are corrugated, special use requirements are met, and in order to facilitate smooth extrusion forming process, transition fillets are arranged at right angles; the wave-shaped bulges and the grooves are arranged at intervals in a matched manner by adopting semicircles with proper radius proportion, so that the surface area of the inner wall of the through hole is increased, the contact area of a unit circulation hole is increased, the contact efficiency of a refrigerant is improved, the heat exchange efficiency is also improved, and meanwhile, the heat exchange efficiency can be accurately controlled by accurately designing the size of the circulation hole; the outer surface is provided with the sprayed zinc layer, so that the corrosion resistance of the aluminum flat tube can be effectively improved, and the service life of the aluminum flat tube is prolonged; each structure to the aluminum flat tube body has carried out the injecing of size, and is rational in infrastructure, can not lead to the waste of material because of the size is too big, and the lumber recovery is high, reduces manufacturing cost, satisfies the user demand.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural view of a section of the aluminum flat tube in the width direction.
In the figure: 1-aluminum flat tube body; 2-a first flow through; 3-a second flow through hole; 4-a first partition; 5-a second partition; 6-a first line segment; 7-a second line segment; 8-a first corrugated line; 9-a second corrugated line; 10-a third wavy line; 11-a third line segment; 12-side arc; 13-a first transition fillet; 14-upper surface; 15-lower surface; 16-a fourth line segment; 17-a fourth corrugated line; 18-fifth line segment; 19-a third groove; 20-a third protrusion; 21-second transition fillet.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube comprises an aluminum flat tube body 1, wherein the section of the aluminum flat tube body 1 along the width direction is in an oblong shape, a first flow through hole 2 and a second flow through hole 3 are arranged inside the aluminum flat tube body 1, and the aluminum flat tube is characterized in that the first flow through hole 2 is respectively arranged on two sides of the aluminum flat tube body 1 along the width direction, the first flow through hole 2 is arranged between the two first flow through holes 2, the second flow through hole 3 is arranged in two numbers, a first partition 4 is arranged between the first flow through hole 2 and the second flow through hole 3, and a second partition 5 is arranged between the two second flow through holes 3; the first flow through hole 2 is an annular shape formed by sequentially connecting a first line segment 6, a second line segment 7, a first corrugated line 8, a second corrugated line 9, a third corrugated line 10 and a third line segment 11 end to end, the second line segment 7 and the third line segment 11 are parallel to the upper surface 14 of the aluminum flat tube body 1, the first line segment 6 is vertically connected with the second line segment 7 and the third line segment 11, the first corrugated line 8 and the third corrugated line 10 are parallel, the second corrugated line 9 is bent in an arc shape, the second corrugated line 9 is concentric with a side arc 12 in the width direction of the aluminum flat tube body 1, and the first line segment 6 is arranged on one side of the side arc 12 far away from the width direction of the aluminum flat tube body 1; the cross section of the second flow through hole 3 is a second rectangle, four corners of the second rectangle are provided with first transition fillets 13, and the side of the second rectangle parallel to the upper surface 14/lower surface 15 of the aluminum flat tube is provided with a fourth line segment 16, a fourth corrugated line 17 and a fifth line segment 18 which are connected in sequence.
The first corrugated line 8 and the third corrugated line 10 are symmetrically arranged on two sides of the first line segment 6, a plurality of first grooves and first bulges are arranged on the first corrugated line 8 at intervals, the first grooves and the first bulges are semicircular, and the first bulges are arranged on an extension line of the second line segment 7.
A plurality of second bulges which are sequentially connected are arranged on the second corrugated line 9 at intervals, the second bulges are semicircular, and the circle center connecting lines of the plurality of second bulges are circular arcs concentric with the side arcs.
A plurality of third grooves 19 and third protrusions 20 are arranged on the fourth corrugated line 17 at intervals, the third grooves 19 and the third protrusions 20 are both semicircular, and the top points of the third protrusions 20 are located on the connecting line of the first line segment 6 and the second line segment 7.
The width of the first partition 4 is the same as the width of the second partition 5.
And a second transition fillet 21 is arranged at the joint of the first line segment 6, the second line segment 7 and the third line segment 11.
The height of the section of the aluminum flat tube body 1 along the width direction is 3 +/-0.06 mm, and the width is 16 +/-0.05 mm; the width of the first partition 4 is 0.5 +/-0.05 mm.
The outer surface of the aluminum flat tube body 1 is provided with a zinc spraying coating.
The zinc spraying amount of the zinc spraying coating is 8 +/-2 g/m2The weight of the aluminum flat pipe body 1 is 63 × 3 g/m.
The tensile strength of the narrow-distance four-hole type parallel flow heat exchange aluminum flat tube is more than or equal to 75MPa, the yield strength is more than or equal to 20MPa, and the elongation is more than or equal to 25%.
The narrow-distance four-hole type parallel flow heat exchange aluminum flat tube is designed with an extrusion die, the extrusion die is installed in an extruder, the narrow-distance four-hole type parallel flow heat exchange aluminum flat tube is obtained by extrusion forming, surface zinc spraying and corrosion preventing treatment and cooling of a refined aluminum bar, and is straightened and cut to length, so that the micro-channel aluminum flat tube applied to an air conditioning system is finally obtained, the surface of the aluminum flat tube body 1 has no obvious flow mark, bump, air hole, slag inclusion and crack defects, and the inner surface has no scratch and indentation defects; the notch has no burr, and the inner part and the outer part of the aluminum flat tube are clean and have no burr.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a narrow apart from four pass parallel flow heat transfer aluminum flat tube, includes the flat aluminum flat tube body, the flat aluminum flat tube body is the long circle along width direction's cross-section, the flat aluminum flat tube body is inside to set up first-class through-hole and second through-hole, its characterized in that: the two sides of the first flow through holes in the width direction of the aluminum flat tube body are respectively provided with one first flow through hole, the first flow through holes are arranged between the two first flow through holes, the two second flow through holes are arranged, a first partition is arranged between the first flow through holes and the second flow through holes, and a second partition is arranged between the two second flow through holes; the first flow through hole is an annular shape formed by sequentially connecting a first line segment, a second line segment, a first corrugated line, a second corrugated line, a third corrugated line and a third line segment end to end, the second line segment and the third line segment are parallel to the upper surface of the aluminum flat tube body, the first line segment is vertically connected with the second line segment and the third line segment, the first corrugated line and the third corrugated line are parallel, the second corrugated line is bent in an arc shape, the second corrugated line is concentric with a side arc of the aluminum flat tube body in the width direction, and the first line segment is arranged on one side of the side arc far away from the aluminum flat tube body in the width direction; the cross-sectional shape of the second flow through hole is a second rectangle, four corners of the second rectangle are provided with first transition fillets, and the side of the second rectangle, which is parallel to the upper surface/lower surface of the aluminum flat tube, is provided with a fourth line segment, a fourth corrugated line and a fifth line segment which are sequentially connected.
2. The narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube according to claim 1, characterized in that: the first corrugated line and the third corrugated line are symmetrically arranged on two sides of the first line segment, a plurality of first grooves and first bulges are arranged on the first corrugated line at intervals, the first grooves and the first bulges are semicircular, and the first bulges are arranged on an extension line of the second line segment.
3. The narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube according to claim 2, characterized in that: the second corrugated line is provided with a plurality of second bulges which are sequentially connected at intervals, the second bulges are semicircular, and circle centers of the plurality of second bulges are connected in a circular arc shape concentric with the side arc.
4. The narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube according to claim 1, characterized in that: and a plurality of third grooves and third bulges are arranged on the fourth corrugated line at intervals, the third grooves and the third bulges are semicircular, and the vertex of each third bulge is positioned on the connecting line of the first line segment and the second line segment.
5. The narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube according to any one of claims 1 to 4, characterized in that: the width of the first partition is the same as that of the second partition.
6. The narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube according to claim 5, characterized in that: and a second transition fillet is arranged at the joint of the first line segment and the second line segment and the third line segment.
7. The narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube according to claim 5, characterized in that: the height of the section of the aluminum flat tube body along the width direction is 3 +/-0.06 mm, and the width is 16 +/-0.05 mm; the width of the first partition is 0.5 +/-0.05 mm.
8. The narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube according to claim 5, characterized in that: and the outer surface of the aluminum flat tube body is provided with a zinc spraying coating.
9. The narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube according to claim 8, characterized in that: the zinc spraying amount of the zinc spraying coating is 8 +/-2 g/m2And the weight of the aluminum flat pipe body is 63 × 3 g/m.
10. The narrow-pitch four-hole type parallel flow heat exchange aluminum flat tube according to claim 8, characterized in that: the tensile strength of the narrow-distance four-hole type parallel flow heat exchange aluminum flat tube is more than or equal to 75MPa, the yield strength is more than or equal to 20MPa, and the elongation is more than or equal to 25%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123394636.3U CN216745612U (en) | 2021-12-30 | 2021-12-30 | Narrow-distance four-hole type parallel flow heat exchange aluminum flat tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123394636.3U CN216745612U (en) | 2021-12-30 | 2021-12-30 | Narrow-distance four-hole type parallel flow heat exchange aluminum flat tube |
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| CN216745612U true CN216745612U (en) | 2022-06-14 |
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| CN202123394636.3U Active CN216745612U (en) | 2021-12-30 | 2021-12-30 | Narrow-distance four-hole type parallel flow heat exchange aluminum flat tube |
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