Heat exchanger fin, heat exchange fin assembly and heat exchanger

Abstract

The utility model relates to a heat exchanger fin, a heat exchange fin assembly and a heat exchanger, and the heat exchanger fin comprises a fin body and a baffling part; the fin body is provided with a first surface and a second surface which are deviated from each other; a plurality of mounting pipes are arranged on the fin body at intervals, and the plurality of mounting pipes are arranged in parallel at intervals; the mounting pipe is used for mounting the heat exchange pipe; a baffling groove is formed between every two adjacent mounting pipes; the baffling piece is arranged in the baffling groove; the baffling pieces are arranged in a concave-convex mode in the airflow direction. Due to the fact that the fin body is provided with the baffling pieces which are arranged in the concave-convex mode, smoke flow can be effectively cut, laminar flow of smoke can be broken, the laminar flow characteristic of the smoke can be damaged, more turbulent flow can be promoted to be formed, and therefore the effective contact area of the smoke and the fin body is increased. And therefore, the air flow which exchanges heat at low efficiency at the gap originally can transfer heat to the heat exchange tube more sufficiently, the heat exchange capacity of the whole heat exchanger is improved, and the whole heat exchange efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to a heat exchanger fin, a heat exchange fin assembly and a heat exchanger. BACKGROUND

[0002] In the heat exchange process of the traditional tube-fin heat exchanger, the high-temperature gas flow entering the fin quickly exchanges heat with the tube wall against the flow of the gas flow in the heat exchange tube. This part of the gas flow has high heat exchange efficiency and the temperature decreases quickly. The high-temperature gas flow flowing in the gap between the heat exchange tubes mainly relies on the heat transfer with the fin to transfer heat to the heat exchange tube, so the heat exchange efficiency is low and the outlet temperature of the flue gas is high. In addition, in the leeward area of the heat exchange tube, due to the flow separation of the gas flow, large-scale vortexes and pressure drops are formed in this area, which further affect the heat transfer and increase the flow resistance.

[0003] Although the heat exchange efficiency is improved by setting multiple flanges for flow guiding or flow splitting in the prior art, there is still room for improvement. CONTENT OF THE UTILITY MODEL

[0004] In order to further improve the heat exchange capacity, the present application provides a heat exchanger fin, a heat exchange fin assembly and a heat exchanger.

[0005] To this end, the present application solves the above technical problems by the following technical solutions:

[0006] A heat exchanger fin, comprising:

[0007] A fin body having a first surface and a second surface facing away from each other; a plurality of mounting tubes are spaced apart on the fin body, and the plurality of mounting tubes are parallel and spaced apart; the mounting tubes are used for mounting heat exchange tubes; a baffle groove is provided between adjacent two mounting tubes;

[0008] A baffle member is provided in the baffle groove; the baffle member is concave-convex arranged along the direction of the gas flow.

[0009] As a preferred scheme of the present application, the number of the baffle members is at least two, and the two baffle members are sequentially connected to form a baffle structure along the direction perpendicular to the gas flow, and the cross section of the baffle structure is wave-shaped along the direction perpendicular to the gas flow.

[0010] As a preferred scheme of the present application, the baffle member comprises:

[0011] A first baffle plate is provided in the baffle groove; the first baffle plate is convex on the first surface;

[0012] A second baffle plate is provided in the baffle groove, the second baffle plate is concave on the first surface and convex towards the second surface; and the first baffle plate and the second baffle plate are arranged along the direction of the gas flow.

[0013] As a preferred solution of the present application, the first baffle is in the shape of an inverted V.

[0014] And / or, the second baffle is in the shape of a V.

[0015] As a preferred solution of the present application, the baffle further comprises a third baffle provided in the baffle groove, the third baffle being located between the first baffle and the second baffle; the cross section of the third baffle is in the shape of a wave along the direction perpendicular to the airflow direction.

[0016] As a preferred solution of the present application, the highest part of the third baffle close to the first surface is lower than the highest part of the first baffle protruding from the first surface;

[0017] The highest part of the third baffle close to the second surface is lower than the highest part of the second baffle protruding from the second surface.

[0018] As a preferred solution of the present application, it further comprises a flow guide flange, the flow guide flange being provided on the first surface and being spaced apart from the baffle groove to disperse the airflow flowing out after passing through the baffle; the flow guide flange is in the shape of an arc and protrudes towards the baffle groove.

[0019] A heat exchange fin assembly, the heat exchange fin assembly comprising at least two heat exchanger fins as described above, a plurality of the heat exchanger fins being stacked.

[0020] As a preferred solution of the present application, the projections of the baffles of adjacent heat exchanger fins along the airflow direction overlap.

[0021] A heat exchanger, comprising heat exchange tubes, the heat exchanger further comprising a heat exchange fin assembly as described above, the heat exchange tubes being provided in the mounting tubes of the heat exchanger fins of the heat exchange fin assembly.

[0022] The beneficial effects of the present application are as follows:

[0023] The heat exchanger fin comprises a fin body and a baffle; the fin body has a first surface and a second surface facing away from each other; a plurality of mounting tubes are provided on the fin body in a spaced apart manner, the plurality of mounting tubes being parallel and spaced apart; the mounting tubes are used for mounting heat exchange tubes; a baffle groove is provided between adjacent two mounting tubes; the baffle is provided in the baffle groove; the baffle is concave-convex along the airflow direction.

[0024] The baffle piece with concave-convex setting on the fin body can effectively cut the flue gas flow, break the laminar flow of the flue gas, destroy the laminar flow characteristics, promote more turbulent flow to form, thereby increasing the effective contact area of the flue gas and the fin body, and making the airflow with low efficient heat exchange at the gap can also more fully transfer heat to the heat exchange pipe, improving the heat exchange capacity of the whole heat exchanger, and further improving the overall heat exchange efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor.

[0026] Figure 1 It is a structure schematic diagram of the heat exchanger fin in the present application;

[0027] Figure 2 It is a structure schematic diagram of the heat exchange fin assembly in the present application;

[0028] Figure 3 It is a right side sectional view of the heat exchanger in the present application, that is, a direction diagram of the flue gas flow;

[0029] Figure 4 It is a front view structure schematic diagram of Figure 3 ;

[0030] Figure 5 It is a partial enlarged view of A in Figure 4 ;

[0031] Figure 6 It is a heat exchange effect diagram of the heat exchanger fin in the present application.

[0032] Explanation of the drawings:

[0033] 1, mounting pipe; 2, fin body; 3, baffle groove; 4, flow guide flange; 5, baffle piece; 51, first baffle plate; 52, second baffle plate; 53, third baffle plate. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] As Figures 1 to 6As shown, a heat exchanger fin includes a fin body 1 and a baffle 5; the fin body 1 has a first surface and a second surface facing away; a plurality of mounting tubes 2 are arranged on the fin body 1 in parallel and at intervals; the mounting tubes 2 are used to mount heat exchange tubes; a baffle groove 3 is arranged between two adjacent mounting tubes 2; the baffle 5 is arranged in the baffle groove 3; the baffle 5 is arranged in concave-convex along the airflow direction.

[0036] Wherein, by arranging the baffle 5 in concave-convex on the fin body 1, the flue gas flow can be effectively cut, the laminar flow of the flue gas is broken, the laminar flow characteristics are destroyed, and more turbulent flow is formed; the increase of such turbulent flow can significantly increase the effective contact area between the flue gas and the fin body 1, so that the airflow with low heat exchange efficiency in the fin gap can also more fully transfer heat to the heat exchange tube, thereby improving the heat exchange capacity of the entire heat exchanger, and further improving the overall heat exchange efficiency.

[0037] Further, as shown in Figure 1 and Figure 2 The number of baffles 5 is at least two, two baffles 5 are connected in sequence along the direction perpendicular to the airflow to form a baffle structure, and the cross section of the baffle structure is wavy along the direction perpendicular to the airflow. Based on the original baffle 5 arranged in concave-convex, further optimization is carried out, which is specifically manifested as: at least two baffles 5 are connected in sequence along the direction perpendicular to the airflow to form a whole baffle structure; the cross section of the baffle structure is wavy along the direction perpendicular to the airflow, so that the airflow can be effectively cut and guided when passing through each baffle 5, the airflow constantly changes direction, and a complex turbulent flow path is formed. The existence of turbulent flow can significantly increase the effective contact area between the flue gas and the fin body 1, so that the airflow with low efficient heat exchange in the gap can also more fully transfer heat to the heat exchange tube, further improving the heat exchange capacity of the entire heat exchanger, thereby greatly improving the overall heat exchange efficiency.

[0038] Further, as shown in Figure 1 and Figure 2As shown, the baffle 5 includes a first baffle plate 51 and a second baffle plate 52; the first baffle plate 51 is arranged in the baffle groove 3; the first baffle plate 51 is convex on the first surface; the second baffle plate 52 is arranged in the baffle groove 3, and the second baffle plate 52 is concave on the first surface and convex towards the second surface; the first baffle plate 51 and the second baffle plate 52 are arranged along the airflow direction. Further refinement of the specific structure and layout of the baffle 5 is as follows: the first baffle plate 51 is located in the baffle groove 3 and is convex on the first surface. The first baffle plate 51 preliminarily cuts and guides the airflow, promotes the formation of turbulent flow of the airflow, and increases the effective contact area of the airflow with the fin body 1. The second baffle plate 52 is also located in the baffle groove 3, but is concave on the first surface and convex towards the second surface. The second baffle plate 52 further changes the airflow path, making the turbulent flow of the airflow after passing through the first baffle plate 51 more complex, and ensuring that the airflow can be more uniformly distributed in the entire heat exchange area. Due to the different convex and concave arrangements of the first baffle plate 51 and the second baffle plate 52, the airflow changes direction when passing through these baffle plates, increasing the effective contact area of the flue gas with the fins and further improving the heat exchange capacity of the entire heat exchanger. In addition, the first baffle plate 51 and the second baffle plate 52 are arranged in sequence along the airflow direction, so that the airflow can experience multiple path changes when passing through these two baffle plates, thereby effectively breaking the laminar flow and enhancing the turbulent flow effect, promoting the formation of more turbulent flow. The turbulent flow can significantly enhance the heat exchange between the gas and the surface of the fin, improve the overall heat exchange efficiency. Also due to the enhancement of turbulent flow and the complexity of airflow path, the heat flux density is more uniform, avoiding the occurrence of local overheating or low temperature area, ensuring the stable operation of the entire heat exchanger, improving the reliability and service life of the equipment.

[0039] Further, as shown in Figure 1 and Figure 2 , the first baffle plate 51 is in the shape of an inverted V; specifically, there is one baffle 5 corresponding to each baffle groove 3, and each baffle 5 has one first baffle plate 51; among the two adjacent baffle grooves 3, the two adjacent first baffle plates 51 are separated by the fin body 1, and then the two ends of each inverted V-shaped first baffle plate 51 are connected to the fin body 1. Alternatively, one baffle groove 3 is provided with multiple baffles 5, then the first baffle plate 51 located on the side is connected to the fin body 1 at one end and to the adjacent first baffle plate 51 at the other end; the first baffle plate 51 located in the middle is connected to the other two first baffle plates 51 adjacent to it at both ends. Among them, the inverted V-shaped first baffle plate 51 can effectively increase the disturbance of the airflow, making the airflow disperse rapidly when passing through the first baffle plate 51, enhancing the turbulent flow effect, thereby achieving preliminary cutting and guiding of the airflow and promoting the formation of complex turbulent flow paths of the airflow.

[0040] Further, as shown in Figure 1 and Figure 2As shown, the second baffle plate 52 is in V shape; in particular, each baffle recess 3 corresponds to one baffle 5, and each baffle 5 has one second baffle plate 52; among two adjacent baffle recesses 3, two adjacent second baffle plates 52 are separated by the fin body 1, and then two ends of each V-shaped second baffle plate 52 are connected to the fin body 1. Alternatively, one baffle recess 3 is provided with multiple baffles 5, and then the second baffle plate 52 located at the side is connected to the fin body 1 at one end and to the adjacent second baffle plate 52 at the other end; the second baffle plate 52 located in the middle is connected to the other two adjacent second baffle plates 52 at both ends. Among them, the V-shaped second baffle plate 52 re-converges and guides the airflow vertically downward, ensuring that the airflow can be more evenly distributed in the entire heat exchange area, further changing the airflow path, making the turbulent state of the airflow after passing through the first baffle plate 51 more complex.

[0041] That is, the combination of the V-shaped first baffle plate 51 and the inverted V-shaped second baffle plate 52, due to the different settings of the V shape and the inverted V shape, the airflow will change direction when passing through these baffle plates, which can more thoroughly break the laminar flow characteristics of the airflow, promote the formation of more turbulent flow, increase the effective contact area of the flue gas and the fin, and further improve the heat exchange capacity of the entire heat exchanger.

[0042] Further, as shown in Figure 1 and Figure 2 , the baffle 5 further comprises a third baffle plate 53 provided in the baffle recess 3, and the third baffle plate 53 is located between the first baffle plate 51 and the second baffle plate 52; the cross section of the third baffle plate 53 is in wave shape along the direction perpendicular to the airflow flow direction. Further details, the third baffle plate 53 is located between the first baffle plate 51 and the second baffle plate 52, and its cross section is in wave shape along the direction perpendicular to the airflow flow direction, which further increases the tortuosity of the airflow path and further enhances the disturbance and mixing of the airflow, achieving multi-level turbulence. Among them, the first baffle plate 51, the third baffle plate 53 and the second baffle plate 52 are arranged in sequence along the airflow flow direction, and the cooperation of the first baffle plate 51, the third baffle plate 53 and the second baffle plate 52 enables the airflow to experience multiple path changes when passing through these three baffle plates, thereby effectively breaking the laminar flow and enhancing the turbulent flow effect, which can significantly improve the turbulent flow degree of the airflow, increase the effective contact area of the airflow and the fin body 1, and thus improve the heat exchange efficiency.

[0043] Further, as shown in Figure 1 and Figure 2As shown, the third baffle 53 protrudes below the highest point of the first surface near the first surface, and the third baffle 53 protrudes below the highest point of the second surface near the second surface. From the flow direction, the projections of the adjacent two heat exchanger fins along the airflow direction overlap, the second baffle 52 of the upper heat exchanger fin overlaps with the first baffle 51 of the lower heat exchanger fin, and the highest point of the first baffle 51 of the lower heat exchanger fin does not exceed the third baffle 53 of the upper heat exchanger fin, and so on. Through this design, the first baffle 51, the third baffle 53, and the second baffle 52 at different periods and heights are combined to form a gap area heat exchange space in the form of a woven tube network, as shown in Figure 4 、 Figure 5 As shown, the heat exchange capacity of the flue gas away from the heat exchange tube wall surface position area is enhanced. Further, the first baffle 51, the third baffle 53, and the second baffle 52 are arranged in a periodic and multi-layer staggered manner along the airflow direction, so that the baffles are staggered at different heights, forming a complex path change when the airflow passes through. This multi-layer staggered arrangement is similar to a woven mesh structure, which forms a complex flow path when the airflow passes through the heat exchange space. The gap area between each two baffles respectively constitutes an efficient heat exchange space, improves the flow field distribution, reduces the vortex and pressure drop in the leeward area, and greatly increases the effective contact area of the airflow and the heat exchange tube wall surface. At the same time, the woven mesh structure promotes the generation of strong turbulent flow effect in the heat exchange space, breaks the laminar flow state, and increases the heat exchange efficiency between the flue gas and the heat exchange tube wall surface. The enhancement of turbulent flow makes the heat transfer more uniform, reducing the formation of local overheating or low temperature areas. Especially in the position away from the heat exchange tube wall surface, the woven mesh structure can effectively guide the flue gas into these areas, ensuring that the temperature distribution in the entire heat exchanger is more uniform. In addition, the height limit ensures that the third baffle 53 is not too high, thereby avoiding unnecessary resistance to the airflow, thereby effectively reducing the overall airflow resistance, while maintaining high heat exchange efficiency and reducing system energy consumption, maintaining good turbulent flow effect.

[0044] Further, as shown in Figures 1 to 3As shown, it also includes a flow guide flange 4, which is arranged on the first surface and spaced from the baffle groove 3 to disperse the airflow flowing out after passing through the baffle 5; the flow guide flange 4 is arranged in an arc shape and protrudes towards the direction of the baffle groove 3. The flow guide flange 4 is further introduced, and its main function is to disperse the airflow flowing out after passing through the baffle 5, avoiding the local pressure drop and energy loss caused by the concentration of airflow. The arc-shaped flow guide flange 4 enables the airflow to transition more smoothly, reducing airflow separation and vortex phenomena, thereby improving the uniformity and stability of the airflow. In addition, the flow guide flange 4 protrudes towards the direction of the baffle groove 3, which can better guide the airflow, making it more evenly distributed when leaving the heat exchanger, reducing the formation of eddy and large-scale vortex in the leeward area, further optimizing the flow field distribution, improving the heat exchange efficiency and reducing energy loss.

[0045] As shown in the drawings, Figure 6 The heat exchange effect diagram of the heat exchanger fin in use of the present application is shown. From Figure 6 It can be observed that the temperature of the flue gas at the inlet is low and uniformly distributed, and after the temperature of the flue gas decreases, it gradually increases, and the temperature distribution of the flue gas at the outlet is uniform. During the flow of the flue gas, the heat exchange amount of the flue gas gradually increases when passing through the first baffle 51, the third baffle 53 and the second baffle 52; the heat exchange amount of the flue gas rapidly decreases after passing through the baffles; when the flue gas reaches the flow guide flange 4, part of the flue gas is turned back by the flow guide flange 4, and the heat exchange amount of the flue gas increases again. Specifically, when the flue gas enters in sequence, the first baffle 51 between the adjacent two heat transfer pipe installation pipes can preliminarily guide the high-temperature flue gas to the heat transfer pipe; the flue gas then passes through the third baffle 53 to guide the flue gas to the left and right heat transfer pipes; the second baffle 52 again guides the flue gas to the left and right, and finally impacts on the flow guide flange 4 located at the tail; wherein the first baffle 51, the third baffle 53 and the second baffle 52 are arranged in the fin area along the flow direction of the airflow, and vortex is formed between every two baffles, which plays a role of disturbing the airflow, reduces the flow velocity, and makes the heat more concentrated in the fin body 1, at this time the heat flux density on the surface of the fin body 1 is relatively high, and a significant heat exchange phenomenon occurs. This phenomenon shows that the convective heat exchange effect between the flue gas and the fin body 1 has been significantly improved, thereby making the heat exchange process more efficient. In addition, when the flue gas reaches the flow guide flange 4, part of the flue gas is turned back by the flow guide flange 4 to form a vortex, so that the heat exchange amount of the flue gas increases again, and the flue gas is guided again for heat exchange to reduce energy loss.

[0046] The present application also provides a heat exchange fin assembly, as shown in the drawings, Figures 2 to 5As shown, the heat exchange fin assembly comprises at least two heat exchanger fins as described above, and the heat exchanger fins are arranged in layers. Further, the projection of the baffle 5 of the adjacent heat exchanger fins in the airflow direction is overlapped. Specifically, from the flow direction, the projection of the baffle 5 of the two adjacent heat exchanger fins in the airflow direction is overlapped, that is, the second baffle 52 of the upper heat exchanger fin and the first baffle 51 of the lower heat exchanger fin have an overlapping part, and so on; through this design, the first baffle 51, the third baffle 53 and the second baffle 52 at different periods and heights jointly form a gap area heat exchange space in the form of a woven pipe network, which enhances the heat exchange capacity of the flue gas away from the heat exchange pipe wall surface position area. The specific structure of the heat exchanger fin is referred to the above embodiments. Since the heat exchange fin assembly adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0047] The application also provides a heat exchanger (not shown in the figure), comprising a heat exchange pipe and a heat exchange fin assembly, the heat exchange pipe is arranged in the mounting pipe 2 of the heat exchanger fin of the heat exchange fin assembly. The specific structure of the heat exchange fin assembly is referred to the above embodiments. Since the heat exchanger adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0048] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0049] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, these modifications and variations of the present application are intended to be included within the scope of the present application claims and their equivalent technologies.

Claims

1. A heat exchanger fin, characterized by, The application relates to a heat exchanger fin assembly. The fin body (1) is provided with a plurality of mounting tubes (2) at intervals, and the mounting tubes (2) are parallel and arranged at intervals; the mounting tubes (2) are used for mounting heat exchange tubes; a baffle groove (3) is arranged between two adjacent mounting tubes (2). The baffle member (5) is arranged in the baffle groove (3) and is concave-convex along the air flow direction.

2. The heat exchanger fin of claim 1, wherein The number of the baffle members (5) is at least two, and the two baffle members (5) are sequentially connected along the direction perpendicular to the air flow direction to form a baffle structure, and the cross section of the baffle structure is wavy along the direction perpendicular to the air flow direction.

3. The heat exchanger fin of claim 1, wherein The baffle member (5) comprises: A first baffle plate (51) is arranged in the baffle groove (3) and protrudes from the first surface; A second baffle plate (52) is arranged in the baffle groove (3) and protrudes from the second surface; the first baffle plate (51) and the second baffle plate (52) are arranged along the air flow direction.

4. The heat exchanger fin of claim 3, wherein The first baffle plate (51) is in the shape of an inverted V; And / or, the second baffle plate (52) is in the shape of a V.

5. The heat exchanger fin of claim 3, wherein The baffle member (5) further comprises a third baffle plate (53) arranged in the baffle groove (3), and the third baffle plate (53) is located between the first baffle plate (51) and the second baffle plate (52); the cross section of the third baffle plate (53) is wavy along the direction perpendicular to the air flow direction.

6. The heat exchanger fin of claim 5, wherein The highest position of the third baffle plate (53) close to the first surface is lower than the highest position of the first baffle plate (51) protruding from the first surface; The highest position of the third baffle plate (53) close to the second surface is lower than the highest position of the second baffle plate (52) protruding from the second surface.

7. The heat exchanger fin of claim 1, wherein The heat exchanger fin assembly comprises at least two heat exchanger fins as claimed in any one of claims 1-7, and the plurality of heat exchanger fins are arranged in layers.

8. A heat exchange fin assembly, characterized by, The projection parts of the baffle members (5) of the adjacent heat exchanger fins along the air flow direction are overlapped.

9. The heat exchange fin assembly of claim 8, wherein, The heat exchanger comprises heat exchange tubes, and further comprises the heat exchanger fin assembly as claimed in claim 8 or 9; the heat exchange tubes are arranged in the mounting tubes (2) of the heat exchanger fins of the heat exchanger fin assembly.

10. A heat exchanger characterized by, ​

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