CN217979982U - Heat exchange fin and heat exchanger with same - Google Patents

Abstract

The application relates to a heat exchange fin and a heat exchanger with the same, relates to the technical field of heat exchange, and aims to improve the heat exchange efficiency of the heat exchanger. The heat exchange fins comprise heat exchange main plates and fin plates; the heat exchange main board is provided with a windward side and a leeward side, and heat exchange airflow flows to the leeward side through the windward side; the heat exchange main board is provided with a windowing surface, and a window is arranged on the windowing surface; the sheet plate is positioned in the window, and at least part of the sheet plate protrudes out of the surface of the window; and the surface of the sheet is provided with a plurality of bubble structures which are arranged at intervals on the surface of the sheet. The bubble-shaped structure is arranged on the sheet plate, so that disturbance to airflow is increased, an airflow boundary layer is broken, and the heat exchange efficiency of the airflow and the sheet plate is improved; meanwhile, the heat exchange area is increased by additionally arranging the bubble structure, so that the heat exchange effect is further enhanced.

Description

Heat exchange fin and heat exchanger with same

Technical Field

The application relates to the technical field of heat exchange, in particular to a heat exchange fin and a heat exchanger provided with the same.

Background

The finned heat exchanger is one of the most widely used heat exchange equipment in gas and liquid heat exchangers, and fins are basic elements in the finned heat exchanger.

The existing heat exchange fins are flat and flaky, and when heat exchange air flows pass through the surfaces of the heat exchange fins, an air flow boundary layer is easily formed on the surfaces of the fins due to the fact that the air flows have viscosity, so that the heat exchange air flows are blocked to exchange heat, the heat transfer speed is reduced, and the heat exchange efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a heat exchange fin capable of improving heat exchange efficiency and a heat exchanger equipped with the same to solve the above problems.

A heat exchange fin comprises a heat exchange main plate and a plate; the heat exchange main board is provided with a windward side and a leeward side, and heat exchange airflow flows to the leeward side through the windward side; the heat exchange main board is provided with a windowing surface, and a window is formed in the windowing surface; the sheet plate is positioned in the window, and at least part of the sheet plate protrudes out of the windowing surface; and the sheet surface is provided with a plurality of bubble structures which are arranged at intervals on the sheet surface.

It can be understood that the bubble-shaped structures are arranged on the sheet plates, so that the disturbance to the airflow can be increased, the boundary layer of the airflow is broken, and the airflow can fully exchange heat with the sheet plates; meanwhile, the additional arrangement of the bubble structure increases the heat exchange area, so that the heat exchange effect is further enhanced.

In one embodiment, a plurality of the fin plates are arranged at intervals along the flowing direction of the heat exchange airflow in the window, and at least part of the fin plates are provided with a plurality of the bubble structures.

It can be understood that the disturbance of the fluid can be enhanced by arranging a plurality of the fin plates with bubble structures, and the heat exchange effect is further enhanced.

In one embodiment, the panel provided with the bubble is a first panel, the panel not provided with the bubble is a second panel, and at least one second panel is arranged between any two adjacent first panels.

It can be understood that by arranging and combining the fin plates with the bubble structures and the fin plates without the bubble structures, the fluid is continuously and repeatedly disturbed and buffered, more energy is consumed, and heat exchange is facilitated.

In one embodiment, the sheet plate is provided with a first side wall and a second side wall which are arranged at intervals along the thickness direction of the sheet plate; the blister structure comprises a first projection projecting from the sheet from the second sidewall toward the first sidewall, and a first concave surface is provided on the first projection on a side of the second sidewall; and/or the bubble structure comprises a second protrusion protruding from the sheet from the first sidewall to the second sidewall, and a second groove surface is arranged on the second protrusion at one side of the first sidewall.

It can be understood that the heat exchange area can be increased by the protrusions and the grooves, the protrusions have a blocking effect on airflow and can enhance the disturbance of the airflow, and the grooves can enable the airflow to swirl at the depressions, so that the heat exchange time is prolonged.

In one embodiment, a plurality of first bulges are arranged on the same sheet plate at intervals along the length direction of the sheet plate; and/or a plurality of second bulges are arranged on the same sheet plate along the length direction of the sheet plate at intervals.

It will be appreciated that by providing the first and/or second projections on the same sheet, each sheet can be made to increase the disturbance to the airflow to a different extent, thereby breaking the boundary layer of the airflow.

In one embodiment, a plurality of windows are arranged on the surface of the window at intervals along the flowing direction of the heat exchange airflow, and each window is internally provided with the sheet plate; in the plurality of windows, the first projection and/or the second projection are/is provided on the sheet plate in at least two adjacent windows.

It can be understood that by providing a plurality of windows and providing a plurality of plates with first protrusions and/or second protrusions in the windows, the turbulence effect can be enhanced and the heat dissipation effect can be enhanced.

In one embodiment, in a plurality of the windows, the sheet in at least one of the windows is inclined towards the windward side, and the sheet in at least one of the windows is inclined towards the leeward side; the sheet plate facing the windward side is provided with the first bulge, and the sheet plate facing the leeward side is provided with the first bulge or the second bulge; or the second bulge is arranged on the sheet plate facing the windward side, and the second bulge or the first bulge is arranged on the sheet plate facing the leeward side.

It can be understood that the arrangement of part of the plate plates inclining towards the windward side can form a blocking effect on the heat exchange airflow, so that the heat exchange airflow is convoluted at the plate plates, the disturbance of the heat exchange airflow is increased, and the heat exchange efficiency is improved; meanwhile, the arrangement of partial sheet plates inclined towards the leeward side is beneficial to increasing the heat exchange area, so that the heat exchange effect is improved; the inclined directions of the two sheet plates are combined at different positions, so that a more remarkable heat exchange effect can be generated. Through set up first arch and/or second arch on the lamella board of different orientations, the protruding setting of slope collocation of lamella board can further increase the area of heat transfer and to the disturbance effect of air current.

In one embodiment, the first protrusion and/or the second protrusion are/is arranged in a hollow hemispherical structure; and the diameter of each hemispherical structure accounts for 30-60% of the width of the corresponding sheet plate.

It can be understood that the first protrusion and/or the second protrusion are/is a hollow hemisphere, so that direct stamping and manufacturing on the surface of the sheet plate are facilitated, and the surface of the hollow hemisphere is smooth, so that stress concentration can be reduced; meanwhile, the diameter range of the hemisphere is set, and the proper hemisphere size can effectively generate a violent disturbance effect on fluid, so that the heat exchange is enhanced.

In one embodiment, the central axis of the first protrusion and/or the central axis of the second protrusion are along the thickness direction of the sheet.

It will be appreciated that the first projection and/or the second projection are provided along the thickness of the sheet to facilitate manufacturing.

The application also provides the following technical scheme:

a heat exchanger comprises the heat exchange fin.

It can be understood that, the heat exchanger can enhance the heat exchange effect and improve the overall performance of the heat exchanger by using the heat exchange fins with the bubble structure.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a top view of a first embodiment of a heat exchange fin provided in the present application.

Fig. 2 is a front view of a first embodiment of a heat exchange fin provided herein.

Fig. 3 is a partial enlarged view of fig. 2 at a.

Fig. 4 is a perspective view of a first embodiment of a heat exchange fin provided in the present application.

Fig. 5 is a top view of a second embodiment of a heat exchange fin provided in the present application.

Fig. 6 is a front view of a second version of a heat exchange fin provided herein.

Fig. 7 is a partial enlarged view of fig. 6 at B.

Reference numerals: 100. heat exchange fins; 10. a heat exchange main board; 10a, windward side; 10b, leeward side; 11. a windowed surface; 12. a window; 13. a sheet; 131. a bubble structure; 132. a first side wall; 133. a second side wall; 1311a, first protrusions; 1311b, a first groove; 1312a, a second projection; 1312b and a second groove.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The use of the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like in the description of the present application is for purposes of illustration only and is not intended to represent the only embodiment.

Furthermore, 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 at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 7, the present application provides a heat exchange fin 100 including a heat exchange main plate 10 and a plate 13; the heat exchange main board 10 is provided with a windward side 10a and a leeward side 10b, and heat exchange airflow flows to the leeward side 10b through the windward side 10 a; the heat exchange main board 10 is provided with a windowing surface 11, a window 12 is arranged on the windowing surface 11, the sheet plate 13 is positioned in the window 12, and at least part of the sheet plate 13 protrudes out of the windowing surface 11; wherein the surface of the sheet 13 is provided with a plurality of bubble-like structures 131, and the plurality of bubble-like structures 131 are arranged at intervals on the surface of the sheet 13, specifically, the plurality of bubble-like structures 131 are arranged at intervals along the length direction of the sheet 13.

The design of the bubble structure 131 influences the heat exchange area optimization factor, and the heat exchange area optimization factor JF is a general evaluation criterion for evaluating the performance of the heat exchange fin 100, specifically, JF = j/f ^1/3 (ii) a When the heat exchange area optimization factor is larger, the performance of the heat exchanger is better.

Wherein j is a heat transfer factor related to heat exchange of the fin and is defined as

In the formula, nu is a nussel number of the surface of the fin, represents a dimensionless number of the intensity of convective heat transfer when a fluid flows through the surface of an object, and the larger Nu is, the stronger heat transfer is shown, and the bubble structure 131 can disturb the airflow, so that the intensity of the airflow heat transfer is stronger, and the Nu is increased. Re is the Reynolds number of the fluid,

where ρ represents the fluid density, ν represents the fluid velocity, d represents the tube diameter, η represents the fluid viscosity coefficient, and bubble 131 provides an obstruction to the air flow. Thus the gas flow velocity decreases and Re decreases. Pr is the Plantt number and is generally 0.7, so that the heat transfer factor j is increased under the conditions of Nu increase, re decrease and Pr fixation, thereby increasing the heat exchange area optimization factor and ensuring that the heat exchanger has better performance.

f is the friction factor of the fin related to pressure loss, which is defined as

Here, Δ p is a pressure loss of the fin surface, which represents a pressure difference before and after the fluid flows through the fin surface, and the larger Δ p represents a larger pressure friction loss, and the design of the bubble structure 131 has little influence on the pressure difference of the sheet 13, and the pressure friction loss is unchanged; d is the equivalent diameter of the minimum through section of the fluid side and is kept unchanged; p is the density of the fluid and is,

the bubble 131 increases the heat exchange area of the sheet 13, increases the resistance to the fluid, and thus decreases the flow rate of the air stream,

decrease; l is the characteristic length of the fin and is kept unchanged. And thus the friction factor f increases.

Therefore, the design of bubble structure 131 has increased the heat transfer area of sheet plate 13, can effectively promote the knossel number Nu in sheet plate 13 surface, and then increase heat transfer factor j, and simultaneously, although the increase of friction factor is less, overall, heat transfer area optimization factor JF increase, and heat exchange fin 100's heat transfer performance obtains promoting, and the heat transfer effect is stronger.

In conclusion, with the above arrangement, when the airflow passes through the heat exchange fins 100, the bubble-shaped structures 131 on the plate sheets 13 obstruct the airflow, so that the speed of the airflow is inconsistent, thereby increasing disturbance to the airflow, breaking the boundary layer of the airflow, and improving the heat exchange efficiency between the airflow and the plate sheets 13; meanwhile, the heat exchange area is increased by adding the bubble-shaped structure 131, so that the heat exchange effect is further enhanced.

As shown in fig. 2, 3, 6, and 7, the sheet 13 has a first side wall 132 and a second side wall 133 spaced apart from each other in the thickness direction thereof. As shown in fig. 2 and 3, in the first scheme, the bubble-like structure 131 includes a first protrusion 1311a protruding from the second sidewall 133 toward the first sidewall 132 and protruding from the sheet 13, and a first groove 1311b is disposed on the first protrusion 1311a at one side of the second sidewall 133. With the arrangement, when the air flow passes through the sheet plate 13, the first protrusion 1311a has a blocking effect on the air flow, so that the air flow is divided, that is, the air flow can continue to flow only by bypassing the first protrusion 1311a, thereby disturbing the air flow, facilitating breaking of an air flow boundary layer, and improving heat exchange efficiency.

In a second alternative, as shown in figures 6 and 7, the bubble 131 comprises a second protrusion 1312a protruding from the first wall 132 towards the second wall 133 from the flap 13, and a second recess 1312b is provided on the second protrusion 1312a at a side of the first wall 132. With this arrangement, when passing through sheet 13, the air flows through the surface of second groove 1312b and swirls in the surface of second groove 1312b, thereby increasing the heat exchange time with sheet 13 and allowing sufficient heat exchange between the air flow and sheet 13.

In the actual production process, the first protrusion 1311a and the second protrusion 1312a are both manufactured by stamping and forming, so as to form a corresponding first groove 1311b and a corresponding second groove 1312b, where an inner wall of the first groove 1311b is a first groove 1311b surface, and an inner wall of the second groove 1312b is a second groove 1312b surface.

As shown in fig. 1 to 7, a plurality of sheet plates 13 are arranged at intervals along the flow direction of the heat exchange airflow in the window 12, and at least a part of the sheet plates 13 are provided with a plurality of bubble structures 131. Thus, by providing a plurality of panels 13 with bubbles 131, the bubbles 131 cause severe turbulence to the airflow as it passes over the panels 13, enhancing heat transfer.

As shown in fig. 1 to 7, a panel 13 provided with a bubble 131 is used as a first panel, a panel 13 not provided with a bubble 131 is used as a second panel, and one second panel is provided between any two adjacent first panels. Thus, through the combination of the sheet plates 13 with the bubble structures 131 and the sheet plates 13 without the bubble structures 131, the airflow passes through the first sheet plate, then passes through the second sheet plate and then passes through the first sheet plate to reciprocate, so that the airflow is buffered on the second sheet plate after passing through the turbulence process of the bubble structures 131, and the airflow passes through a new turbulence process when not being completely stable, so reciprocating that the airflow can further dissipate energy, and thus an ideal heat dissipation effect is achieved.

It should be noted that in other embodiments, two, three, \8230; and two second panels, the number of which between two adjacent first panels is determined by the actual heat dissipation expectation, the spacing between the panels 13, and the size of the bubble structure 131.

Specifically, as shown in fig. 1 to 4, in the first scheme, a plurality of first protrusions 1311a spaced along the length direction of the sheet 13 are provided on the same sheet 13; thus, the same plate 13 has the same blocking effect on the airflow, and the airflow can be disturbed, so that the airflow boundary layer is broken.

As shown in fig. 5 to 7, in the second embodiment, a plurality of second protrusions 1312a are provided on the same sheet 13 at intervals in the longitudinal direction of the sheet 13. In this way, the bubble-like structure 131 on the same sheet 13 can cause the airflow to swirl, thereby increasing the heat exchange time between the airflow and the sheet 13.

In other embodiments, a plurality of first protrusions 1311a and second protrusions 1312a are provided on the same sheet 13, spaced apart along the length of sheet 13. Like this, same one piece board 13 can enough make the air current increase disturbance and can make the air current increase to revolve round, and the air current can produce more violent disturbance under the influence of two kinds of heat transfer processes simultaneously to promote the heat transfer effect.

A plurality of windows 12 are arranged on the windowing surface 11 at intervals along the flowing direction of the heat exchange airflow, and a sheet plate 13 is arranged in each window 12; as shown in fig. 1 to 4, in a preferred embodiment, the sheet 13 of two adjacent windows 12 is provided with a first protrusion 1311a. Thus, the plurality of windows 12 can increase the number of the plates 13, so as to further improve the heat exchange capability and efficiency of the heat exchange fin 100. Meanwhile, the plurality of sheets 13 with the first protrusions 1311a are disposed in the two windows 12, which can enhance disturbance of the air flow, thereby enhancing the heat exchange effect.

In another preferred embodiment, as shown in fig. 5 to 7, the second protrusion 1312a is provided on the sheet 13 in two adjacent windows 12. Thus, the plurality of sheets 13 with the second protrusions 1312a are disposed in the two windows 12, so that the airflow can continuously swirl, the heat exchange time with the sheets 13 is increased, and the heat exchange effect is also enhanced.

In other embodiments, sheet 13 in two adjacent windows 12 is provided with first protrusion 1311a and second protrusion 1312a, i.e. sheet 13 in one window 12 is provided with first protrusion 1311a and sheet 13 in the other window 12 is provided with second protrusion 1312a. Thus, when the air flow passes through the sheet 13 provided with the first protrusions 1311a, severe disturbance is generated, and when the air flow passes through the sheet 13 provided with the second protrusions 1312a, convolution is generated to sufficiently exchange heat with the sheet 13; the two windows 12 have different effects on the heat exchange of the air flow, which can enhance the heat exchange.

It should be noted that, in the practical application, three or four consecutive 8230, 8230may be provided, and the window 12 is provided with the first protrusion 1311a and/or the second protrusion 1312a, which are determined according to the number of the windows 12 and the requirement for heat exchange.

Among the plurality of windows 12, the sheet 13 in at least one window 12 is inclined toward the windward side 10a, and the sheet 13 in at least one window 12 is inclined toward the leeward side 10b; thus, the arrangement of part of the sheet plates 13 inclining towards the windward side 10a can form a blocking effect on the heat exchange airflow, so that the heat exchange airflow is convoluted at the sheet plates 13, the disturbance of the heat exchange airflow is increased, and the heat exchange efficiency is improved; meanwhile, the arrangement of the partial sheet plates 13 inclined towards the leeward side 10b is beneficial to increasing the heat exchange area, so that the heat exchange effect is improved; the inclined directions of the two kinds of sheet plates 13 are combined through different positions, so that a more remarkable heat exchange effect can be generated.

Specifically, when the sheet 13 facing the windward side 10a is provided with the first protrusion 1311a, in a preferred embodiment, the sheet 13 facing the leeward side 10b is provided with the first protrusion 1311a. In this way, when the air flow passes through the heat exchange fin 100, the air flow can be disturbed by the first protrusion 1311a, thereby enhancing heat exchange.

While the sheet 13 facing the windward side 10a is provided with a first protrusion 1311a, in another preferred embodiment the sheet 13 facing the leeward side 10b is provided with a second protrusion 1312a. Thus, the airflow is disturbed by the obstruction of the first protrusion 1311a when passing through the sheet 13 toward the windward side 10 a; when the airflow flows through the sheet 13 facing the leeward side 10b, the second protrusion 1312a protrudes in the direction opposite to that of the first protrusion 1311a, so that the airflow flows through the second groove 1312b and swirls, thereby increasing the heat exchange time.

While the flap 13 facing the windward side 10a is provided with a second protrusion 1312a, in a preferred embodiment the flap 13 facing the leeward side 10b is provided with a second protrusion 1312a. Since the second protrusion 1312a protrudes from the first sidewall 132 of the sheet 13 to the second sidewall 133 along the thickness direction of the sheet 13 and protrudes from the sheet 13, the airflow directly contacts with the second groove 1312b to swirl, thereby increasing the heat exchange time.

While the sheet 13 facing the windward side 10a is provided with the second protrusion 1312a, in another preferred embodiment, the sheet 13 facing the leeward side 10b is provided with the first protrusion 1311a. Thus, when the airflow passes through the sheet 13 facing the windward side 10a, the airflow passes through the second grooves 1312b and swirls around because the second protrusions 1312a protrude in the opposite direction to the first protrusions 1311a, so that the heat exchange time is increased; the airflow is disturbed by the obstruction of the first protrusion 1311a when passing through the sheet 13 towards the leeward side 10 b.

Specifically, the first protrusion 1311a and the second protrusion 1312a are arranged in a hollow hemispherical structure; and, the diameter of each hemispherical structure accounts for 30% -60% of the width of the corresponding sheet 13.

In this way, the first protrusion 1311a and the second protrusion 1312a are hollow hemispheres, the structure of the hollow hemispheres is convenient for direct stamping and manufacturing on the surface of the sheet plate 13, and the smooth surface of the hollow hemispheres can reduce stress concentration; simultaneously, set up the diameter range of hemisphere, produce the hemisphere of suitable size and can produce violent disturbance effect to the fluid effectively, if the hemisphere undersize then weak to the disturbance effect of air current, if the hemisphere is too big then can influence the installation of sheet 13 and the quantity of sheet 13, consequently, the diameter range of confirming the hemisphere structure does benefit to the reinforcing heat transfer.

In other embodiments, the first protrusion 1311a and the second protrusion 1312a are hollow cubes, hollow triangular pyramids or hollow prisms, which can also disturb the airflow to enhance the heat exchange effect.

Specifically, the diameter of each hemispherical structure accounts for 30%, 45%, 50%, 60%, etc. of the width of the corresponding sheet 13. Of course, the ratio of the diameter of each hemispherical structure to the width of the corresponding sheet 13 may also be chosen to be other values within this range, and this is not exhaustive.

It should be noted that the central axes of first boss 1311a and second boss 1312a are arranged along the thickness direction of sheet 13, that is, first boss 1311a and/or second boss 1312a are arranged along the thickness direction of sheet 13, so that the production and manufacturing are facilitated. In other embodiments, the central axes of the first protrusion 1311a and the second protrusion 1312a may also be along the thickness direction of the heat exchange main plate 10, so that more first protrusions 1311a or second grooves 1312b are exposed, and the airflow can contact more surfaces of the first protrusions 1311a and the second grooves 1312b, which is favorable for further increasing the heat exchange area. Of course, it is also possible that the central axis of the first protrusion 1311a is along the thickness direction of the sheet plate 13, and the central axis of the second protrusion 1312a is along the thickness direction of the heat exchange main plate 10; or, the central axis of the first protrusion 1311a is along the thickness direction of the heat exchange main plate 10, and the central axis of the second protrusion 1312a is along the thickness direction of the plate 13, so that the heat exchange effect is enhanced to different degrees for the air flow by combining and matching.

As shown in fig. 1 to 7, the sheet plate 13 used in each embodiment is a flat sheet, but in actual use, the shape of the sheet plate 13 is not limited to a flat sheet shape, and may be other shapes such as a wavy shape.

In the actual use process, the air flow flows from the windward side 10a to the leeward side 10b, when flowing through the sheet plate 13, the bubble-shaped structure 131 on the sheet plate 13 is matched with different inclination directions and inclination angles of the sheet plate 13 to generate violent disturbance to the air flow, break through the boundary layer of the air flow, and fully exchange heat between the air flow and the sheet plate 13, thereby finally completing the heat exchange process.

The present application further provides a heat exchanger, which includes the heat exchange fin 100 described above. Therefore, the heat exchanger uses the heat exchange fins 100 with the bubble structures 131, airflow is disturbed, an airflow boundary layer is broken, meanwhile, the heat exchange area is increased, the heat exchange effect can be enhanced, and the overall performance of the heat exchanger is improved.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims (10)

1. A heat exchange fin, characterized in that the heat exchange fin comprises:

the heat exchange main board is provided with a windward side and a leeward side, and the heat exchange airflow flows to the leeward side through the windward side; the heat exchange main board is provided with a windowing surface, and a window is formed in the windowing surface;

the sheet plate is positioned in the window, and at least part of the sheet plate protrudes out of the windowing surface; and the sheet surface is provided with a plurality of bubble structures, and the bubble structures are arranged at intervals on the sheet surface.

2. The heat exchange fin according to claim 1, wherein a plurality of the fin plates are arranged at intervals along a flow direction of the heat exchange air flow in the window, and at least a part of the fin plates are provided with a plurality of the bubble structures.

3. The heat exchange fin according to claim 2, wherein the one sheet provided with the bubble-like structure is a first sheet, the one sheet not provided with the bubble-like structure is a second sheet, and at least one second sheet is provided between any adjacent two of the first sheets.

4. The heat exchange fin according to any one of claims 1 to 3, wherein the fin plate has a first side wall and a second side wall spaced apart in a thickness direction thereof;

the bubble structure comprises a first bulge protruding from the second side wall to the first side wall and arranged on the sheet, and a first groove surface is arranged on one side of the first bulge, which is positioned on the second side wall; and/or the bubble structure comprises a second bulge protruding from the first side wall to the second side wall and arranged on the sheet plate, and a second groove surface is arranged on one side of the first side wall on the second bulge.

5. The heat exchange fin according to claim 4, wherein a plurality of first protrusions are arranged on the same sheet plate at intervals along the length direction of the sheet plate; and/or a plurality of second bulges are arranged on the same sheet plate along the length direction of the sheet plate at intervals.

6. The heat exchange fin according to claim 4, wherein a plurality of windows are arranged on the surface of the window at intervals along the flowing direction of the heat exchange airflow, and each window is provided with the plate;

in a plurality of the windows, the first protrusion and/or the second protrusion are/is provided on the sheet plate in at least two adjacent windows.

7. The heat exchange fin according to claim 6, wherein in a plurality of the windows, the sheet in at least one of the windows is inclined toward the windward side and the sheet in at least one of the windows is inclined toward the leeward side;

the sheet plate facing the windward side is provided with the first bulge, and the sheet plate facing the leeward side is provided with the first bulge or the second bulge; or the second bulge is arranged on the sheet plate facing the windward side, and the second bulge or the first bulge is arranged on the sheet plate facing the leeward side.

8. The heat exchange fin according to claim 4, wherein the first protrusion and/or the second protrusion are/is provided in a hollow hemispherical structure; and the diameter of each hemispherical structure accounts for 30-60% of the width of the corresponding sheet plate.

9. The heat exchange fin according to claim 4, wherein the central axis of the first protrusion and/or the central axis of the second protrusion are along the thickness direction of the plate.

10. A heat exchanger characterized by comprising the heat exchange fin according to any one of claims 1 to 9.

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