阅读说明：本技术 一种翅片及其加工方法、热交换器及空调器 (Fin and processing method thereof, heat exchanger and air conditioner ) 是由 刘晓蕾 曹法立 石丽华 孟建军 张文强 于 2021-01-19 设计创作，主要内容包括：本发明涉及热交换技术领域,其目的是为了提供一种相邻翅片之间支撑效果好的翅片,本发明翅片包括连接部,其沿竖直方向竖向延伸,多个翅片主体,与连接部连接,多个翅片主体沿连接部竖向间隔设置,上下相邻的翅片主体之间形成扁管插槽；翻边部,与各个翅片主体沿上下方向的至少一侧相连接；翻边部包括第一翻折部,第一翻折部的一侧与翅片主体连接；第一翻折部上具有沿其表面凸起的凸包。本发明的翅片,通过在第一翻折部设置凸包,可增强第一翻折部的强度,相邻翅片之间通过第一翻折部定位间距,支撑效果好,定位牢固,不易出现翅片错位、倒片、叠片等问题。(The invention relates to the technical field of heat exchange, and aims to provide a fin with good supporting effect between adjacent fins, wherein the fin comprises a connecting part, a plurality of fin main bodies and a plurality of flat tube slots, wherein the connecting part vertically extends along the vertical direction; a flanging part connected with at least one side of each fin main body along the up-down direction; the flanging part comprises a first flanging part, and one side of the first flanging part is connected with the fin main body; the first turnover part is provided with a convex hull protruding along the surface of the first turnover part. According to the fin, the convex hulls are arranged on the first folding parts, so that the strength of the first folding parts can be enhanced, and the adjacent fins are positioned at intervals through the first folding parts, so that the fin is good in supporting effect and firm in positioning, and the problems of fin dislocation, inversion, lamination and the like are not easy to occur.)

1. A fin, comprising:

a connecting portion extending vertically in a vertical direction,

the fin bodies are connected with the connecting part and are vertically arranged at intervals along the connecting part, and flat tube slots are formed between the vertically adjacent fin bodies;

a flanging part connected with at least one side of each fin main body along the up-down direction; the flanging part comprises a first flanging part, and one side of the first flanging part is connected with the fin main body; the first turnover part is provided with a convex hull protruding along the surface of the first turnover part.

2. The fin according to claim 1, wherein the flange portion further includes a second folded portion, the second folded portion is connected to the other side of the first folded portion, and the second folded portion is folded toward the outside of the flat tube insertion groove.

3. The fin according to claim 1, wherein the first folded portions are provided on upper and lower sides of each fin body, and adjacent upper and lower first folded portions in each fin body are provided at a spacing in a horizontal direction.

4. The fin according to claim 1, wherein one of the left and right sides of the fin, which is close to the fin body, is a windward end, and one of the left and right sides of the fin, which is close to the connection portion, is a leeward end; one side of the fin main body, which is close to the windward end, is provided with a transverse first bulge;

preferably, the fin body comprises a rectangular part and a necking part which are connected, the rectangular part is connected with the connecting part, and the necking part is formed by inward shrinkage of the windward end of the fin body from the upper side and the lower side; the first convex part extends from the necking part to the rectangular part;

preferably, the first protruding portion is provided in plurality, and the plurality of first protruding portions are arranged at intervals up and down.

5. The fin according to claim 1, wherein one of the left and right sides of the fin, which is close to the fin body, is a windward end, and one of the left and right sides of the fin, which is close to the connection portion, is a leeward end; the fin main body is provided with a second protruding portion which inclines upwards.

6. The fin according to any one of claims 1 to 5, wherein the convex hull is convex toward the outside of the flat tube insertion groove.

7. The fin according to any one of claims 1 to 5, wherein the height of the convex hull is in the range of 0.1mm to 0.5 mm.

8. A heat exchanger comprising a plurality of flat tubes, wherein the flat tubes are formed by stacking a plurality of the fins according to any one of claims 1 to 7 through flat tube slots.

9. An air conditioner characterized by comprising the heat exchanger according to claim 8.

10. The fin machining method is characterized in that the fin comprises a connecting part, a plurality of fin main bodies and a flanging part, wherein the connecting part vertically extends along the vertical direction; the fin bodies are connected with the connecting part, the fin bodies are vertically arranged along the connecting part at intervals, and flat tube slots are formed between the vertically adjacent fin bodies; the flanging part is connected with at least one side of each fin main body along the vertical direction; the flanging part comprises a first flanging part, and one side of the first flanging part is connected with the fin main body; the first folding part is provided with a convex hull protruding along the surface of the first folding part; the fin processing method comprises the following steps:

blanking a plate, namely placing the plate on a die, and finishing the edge of the plate;

performing the convex hulls, and forming the convex hulls by concave-convex mould pressing or extrusion forming;

punching and forming, namely punching and cutting off redundant plates along the track of a cutter by a cutter, and forming a primary flanging part outline;

and (4) bending and forming, namely bending and forming the flanging part along the flanging line in sequence through a die.

Technical Field

The invention relates to the technical field of heat exchange, in particular to a fin and a processing method thereof, a heat exchanger and an air conditioner.

Background

Compare traditional heat exchange tube, the heat transfer coefficient of microchannel flat tube can promote more than 100%, consequently has natural advantage in the aspect of the heat transfer performance. Compared with the traditional copper pipe, the aluminum micro-channel flat pipe is lower in cost and lighter in weight, and in recent years, the micro-channel heat exchanger is widely concerned by the market. At present, in the field of commercial air conditioners, multi-split products of micro-channel heat exchangers are successively introduced by Japan Dajin and Mitsubishi motors, and from the view of practical application effect, after the micro-channel heat exchangers are adopted, the heat exchange capacity and the energy efficiency value of a unit reach the highest industrial level, and the refrigerant charge is greatly reduced.

The fin interval mainly has two kinds of implementation, and the first kind is at fin internal surface add the turn-ups, and the second kind is at the flat tub of slot department design turn-ups of fin. Although the first implementation mode has a good positioning effect of the fin spacing, under the working condition of the evaporator, the flanging part is easy to suspend liquid drops and form a water bridge. The second implementation mode is that when the fin interval is large (such as 1.6 mm), the flanging part is extruded to incline, so that the fin interval is small, the fin interval is not firmly positioned, and the appearance is poor.

Disclosure of Invention

In order to solve the problems of insecure fin spacing positioning in the prior art and the quality defects of fin lodging, poor appearance and the like which are easily caused in the prior art, the embodiment of the invention provides a fin, a processing method thereof, a heat exchanger and an air conditioner.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

the present invention provides a fin, comprising:

a connecting portion extending vertically in a vertical direction,

the fin bodies are connected with the connecting part and are vertically arranged at intervals along the connecting part, and flat tube slots are formed between the vertically adjacent fin bodies;

a flanging part connected with at least one side of each fin main body along the up-down direction; the flanging part comprises a first flanging part, and one side of the first flanging part is connected with the fin main body; the first turnover part is provided with a convex hull protruding along the surface of the first turnover part.

In one embodiment, the flanging part further comprises a second folding part, the second folding part is connected with the other side of the first folding part, and the second folding part is folded towards the outer side of the flat tube slot.

In one embodiment, the first folded parts are respectively arranged at the upper side and the lower side of each fin body, and the adjacent upper first folded parts and the lower first folded parts in each fin body are arranged at intervals in the horizontal direction.

In one embodiment, of the left side and the right side of the fin, the side close to the fin main body is a windward end, and the side close to the connecting part is a leeward end; one side of the fin main body close to the windward end is provided with a transverse first protruding part.

Preferably, the fin body comprises a rectangular part and a necking part which are connected, the rectangular part is connected with the connecting part, and the necking part is formed by inward shrinkage of the windward end of the fin body from the upper side and the lower side; the first protruding portion extends from the throat portion to the rectangular portion.

Preferably, the first protruding portion is provided in plurality, and the plurality of first protruding portions are arranged at intervals up and down.

In one embodiment, of the left side and the right side of the fin, the side close to the fin main body is a windward end, and the side close to the connecting part is a leeward end; the fin main body is provided with a second protruding portion which inclines upwards.

In one embodiment, the convex hull protrudes towards the outer side of the flat tube slot.

In one embodiment, the height of the convex hull ranges from 0.1mm to 0.5 mm.

The invention also comprises a heat exchanger which comprises a plurality of flat pipes, wherein the flat pipes stack a plurality of fins through flat pipe slots.

The invention also comprises an air conditioner comprising the heat exchanger.

The invention also comprises a fin processing method, wherein the fin comprises a connecting part, a plurality of fin main bodies and a flanging part, and the connecting part vertically extends along the vertical direction; the fin bodies are connected with the connecting part, the fin bodies are vertically arranged along the connecting part at intervals, and flat tube slots are formed between the vertically adjacent fin bodies; the flanging part is connected with at least one side of each fin main body along the vertical direction; the flanging part comprises a first flanging part, and one side of the first flanging part is connected with the fin main body; the first folding part is provided with a convex hull protruding along the surface of the first folding part; the fin processing method comprises the following steps:

blanking a plate, namely placing the plate on a die, and finishing the edge of the plate;

performing the convex hulls, and forming the convex hulls by concave-convex mould pressing or extrusion forming;

punching and forming, namely punching and cutting off redundant plates along the track of a cutter by a cutter, and forming a primary flanging part outline;

and (4) bending and forming, namely bending and forming the flanging part along the flanging line in sequence through a die.

Compared with the prior art, the technical scheme of the invention has the following technical effects:

above-mentioned fin through set up the convex closure in first folding portion, can strengthen the intensity of first folding portion, through first folding portion location interval between the adjacent fin, and the supporting effect is good, and the location is firm, is difficult for appearing fin dislocation, fall piece, lamination scheduling problem.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a fin of the present invention;

FIG. 2 is a side view and a partial enlarged view of a fin of the present invention;

FIG. 3 is a schematic structural view of a cuff portion of the fin of the present invention;

FIG. 4 is a first forming step of the fin manufacturing method of the present invention;

FIG. 5 is a second step of the fin manufacturing method of the present invention;

description of reference numerals:

100-a connecting part;

200-a fin body; 210-a rectangular portion; 220-a throat portion; 230-a first boss; 240-a second boss;

300-flanging part; 310-a first fold over; 311-convex hull; 320-a second fold;

400-flat tube slot.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1-5, the fin of this embodiment is applied to a microchannel heat exchanger, and the microchannel heat exchanger includes a plurality of flat tubes, and the flat tube stacks a plurality of fins through flat tube inserting grooves. Specifically, the fin includes a connecting portion 100, a plurality of fin bodies 200, and a burring portion 300. Wherein the connection portion 100 vertically extends in a vertical direction. A plurality of fin main parts 200 are connected with connecting portion 100, and a plurality of fin main parts 200 set up along the vertical interval of connecting portion 100, form flat tub 400 between the adjacent fin main part 200 from top to bottom, and flat tub 400 is used for inserting flat pipe. The burring 300 is connected to at least one side of each fin body 200 in the vertical direction, that is, the burring 300 surrounds the flat tube insertion groove 400. As shown in fig. 2 and 3, the flanging part 300 includes a first flanging part 310 and a second flanging part 320 which are connected, one side of the first flanging part 310 is connected with the fin body 200, the other side of the first flanging part 310 is connected with the second flanging part 320, and the second flanging part 320 is flanged towards the outside of the flat tube slot. Preferably, the first flap 310 is disposed perpendicular to the fin body 200. The adjacent fins are abutted together through the second folded part 320, and the bending height of the first folded part 310 is the fin pitch. Wherein, the first folding part 310 is provided with a convex hull 311 protruding along the surface. Because the processing clout restriction of fin, the height of rolling over of second folded portion 320 can not be too big, and when the height of rolling over of second folded portion 320 reduced to 0.5mm and below, stress can be concentrated toward first folded portion 310, and great fin interval such as 1.6mm this moment often leads to first folded portion 310 to receive the extrusion and take place the slope, leads to the fin interval to be littleer, consequently sets up convex closure 311 and can increase the intensity of first folded portion 310.

Above-mentioned fin through set up convex closure 311 in first folded part 310, can strengthen the intensity of first folded part 310, through first folded part 310 positioning distance between the adjacent fin, and the support effect is good, and the location is firm, is difficult for appearing fin dislocation, fall piece, lamination scheduling problem.

Preferably, the upper and lower sides of each fin body are respectively provided with the burring parts 300, and the adjacent upper and lower burring parts of each fin body are horizontally spaced apart. In the present embodiment, two burring parts, i.e., a burring part 300a, a burring part 300b, a burring part 300c, and a burring part 300d, are provided on both upper and lower sides of each fin body. The burring 300a and the burring 300b are on the same side, and the burring 300c and the burring 300d are on the same side. Gaps of 1mm or more are formed between the burring 300a and the burring 300c, between the burring 300c and the burring 300b, and between the burring 300b and the burring 300 d.

As shown, of the left and right sides of the fin, the side close to the fin body 200 is the windward end, and the side close to the connection portion 100 is the leeward end. The fin body 200 has a first transverse protrusion 230 on a side thereof adjacent to the windward end. The first boss 230 may improve the structural strength of the fin body 200. The first protruding part 230 is transversely arranged, so that the influence of the protrusion on wind resistance can be reduced as much as possible, and the heat exchange efficiency is improved. The first protruding portion 230 is provided in plurality, and preferably, the plurality of first protruding portions 230 are spaced up and down. In this embodiment, two first protruding portions 230 are disposed, and the two first protruding portions 230 are disposed at intervals and can be uniformly distributed on the fin main body 200 in the vertical direction, so as to further improve the structural strength of the fin main body 200.

In the present embodiment, the fin body 200 includes a rectangular portion 210 and a throat portion 220 connected, the rectangular portion 210 is connected to the connecting portion 100, and the throat portion 220 is formed by inward contraction of the upper and lower sides of the wind-facing end of the fin body 200. The first protrusion 230 extends from the throat 220 to the rectangular portion 210. The first protrusion 230 has a long length, so that the junction between the necking portion 220 and the rectangular portion 210 is not easily broken.

The fin body 200 is further provided with an obliquely upward second protruding portion 240, and the second protruding portion 240 can enhance the structural strength of the fin. The second protruding portion 240 is inclined upward, so that the area of the second protruding portion 240 can be increased as much as possible under the condition that the second protruding portion 240 has the same width, thereby better achieving the effect of improving the structural strength of the fin. The second protrusion 240 is disposed between the first protrusion 230 and the connecting portion 100. In this embodiment, the second protruding portion 240 is preferably provided with two, which can avoid the problems of large processing difficulty and easy water accumulation of the fin caused by too complicated protruding structure. The two second protrusions 240 are also arranged at intervals, and can be uniformly distributed on the fin main body 200 in the left-right direction, so that the structural strength of the fin main body 200 is further improved.

In this embodiment, the convex hull 311 protrudes towards the outer side of the flat tube slot 400, that is, the convex hull 311 protrudes upwards, so that it is ensured that no condensed water is accumulated at the position where the convex hull 311 is formed.

As for the shape and number of the convex hulls 311, it is preferable that one convex hull 311 is provided for each first folded part 310, and the convex hull 311 is rectangular, circular or elliptical in shape. The convex hull 311 has a certain characteristic height, and the height range is 0.1 mm-0.5 mm, and the preferable design value is 0.2-0.3 mm.

The folding height of the second folding part 320 is less than 0.5 mm.

The invention also comprises a processing method of the fin, which is shown in fig. 4 and 5 and comprises the following specific steps:

firstly, blanking a plate, placing an aluminum foil plate on a die, and trimming the edge of the aluminum foil plate;

secondly, forming the first boss and the second boss by concave-convex die pressing;

thirdly, performing convex hulls in advance, and forming the convex hulls through concave-convex die pressing or extrusion forming according to design values (convex hull performing areas A) respectively, and referring to fig. 4;

fourthly, punching and forming, namely punching and cutting off redundant plates (punching areas B) along a cutter track Q by a cutter, and forming a primary flanging part outline, which is shown in figure 5;

and fifthly, bending and forming, namely bending and forming the flanging part along the first folding part folding line L1 and the second folding part folding line L2 in sequence through a die.

The invention also comprises a heat exchanger which is a micro-channel heat exchanger and comprises a plurality of flat tubes, and the flat tubes stack a plurality of fins through flat tube slots.

The invention also comprises an air conditioner which comprises the heat exchanger.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.