Plate-fin heat exchange core

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By designing grooves and raised structures on the short seal, the problem of large weight of the short seal is solved, the lightweight and welding stability of the plate-fin heat exchange core is achieved, and the overall performance of the radiator is improved.

CN223165988UActive Publication Date: 2025-07-29RUIFANDE SHANGHAI MASCH CO LTD

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Patent Information

Application Number: CN202422320733.5
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-09-23
Publication Date: 2025-07-29
Estimated Expiration: 2034-09-23

AI Technical Summary

Technical Problem

In the existing aluminum plate-fin heat exchangers, the short seal is relatively heavy, which makes the core of the radiator heavier and difficult to achieve light weight.

Method used

A plate-fin heat exchange core is designed to reduce the weight of the short seal by opening grooves on the short seal and leaving a gap between the inner walls of the protrusion and groove, while abutting with the edge of the outer fin at the end of the protrusion, ensuring assembly and welding quality.

Benefits of technology

The lightweight short seal is achieved, the brazing strength and welding quality are improved, the core weight is reduced, and the lightweight effect of the radiator is enhanced.

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Abstract

The utility model provides a plate-fin type heat exchange core body which comprises a plurality of composite plates, the composite plates are arranged at intervals in the stacking direction, and air channels and water channels which are arranged at intervals are arranged between the composite plates. A groove is formed in the middle of the windward inner side face, the middle of the bottom face of the groove extends towards the outer fins to form a protrusion, in the width direction of the air channel, the tail end of the protrusion abuts against the edges of the outer fins, the windward inner side face and the edges of the outer fins are arranged at intervals, and in the stacking direction, the width direction of the protrusion abuts against the width direction of the air channel. And the edge of the bulge and the inner wall of the groove are arranged at an interval. According to the plate-fin type heat exchange core body, the two sides of the air channel in the width direction are sealed through the short sealing strips, the grooves are formed in the short sealing strips, and the gaps are reserved between the edges of the protrusions and the inner walls of the grooves, so that the weight of the short sealing strips can be reduced.

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Description

Technical Field

[0001] The utility model relates to the technical field of aluminum plate-fin heat exchangers, in particular to a plate-fin heat exchange core body. Background Art

[0002] Aluminum plate-fin heat exchangers are a type of new and highly efficient heat exchange equipment. Due to their compact structure, small volume, high strength, and high heat transfer efficiency, they are widely used in various fields such as petroleum, chemical engineering, and construction machinery. They are recognized as one of the highly efficient new heat exchangers. Since the core part of the radiator consists of many components and has a compact structure, the entire radiator core body is relatively heavy. Therefore, on the basis of ensuring the performance of the radiator, reducing the weight of the core body to make the radiator lightweight is the development trend of plate-fin heat exchangers.

[0003] In the plate-fin heat exchange core body, the short seal strip functions to isolate air and water in the core body. The weight of the seal strip accounts for about one-fourth of the total weight of the core body. Therefore, the lightweight of the short seal strip is also the future development trend.

[0004] To solve the above problems, the utility model provides a plate-fin heat exchange core body that can reduce the weight of the seal strip. Summary of the Utility Model

[0005] To solve the problem of the large weight of the short seal strip in the existing aluminum plate-fin heat exchangers, the utility model provides a plate-fin heat exchange core body.

[0006] According to an object of the utility model, the utility model provides a plate-fin heat exchange core body, comprising:

[0007] A plurality of composite plates, which are arranged at intervals along the stacking direction, and air channels and water channels are arranged alternately between the composite plates;

[0008] An outer fin and a short seal strip, the outer fin is arranged inside the air channel, the short seal strip is hermetically connected to both sides in the width direction of the air channel, and the short seal strip is provided with opposite windward inner sides and windward outer sides and a connecting surface extending between the windward inner side and the windward outer side, wherein the windward inner side faces the outer fin;

[0009] A groove is formed in the middle of the windward inner side, and a protrusion extends from the middle of the bottom surface of the groove towards the outer fin. In the width direction of the air channel, the end of the protrusion abuts against the edge of the outer fin, and the windward inner side and the edge of the outer fin are spaced apart. In the stacking direction, the edge of the protrusion and the inner wall of the groove are spaced apart.

[0010] Preferably, in the width direction of the air passage, the length by which the protrusion extends beyond the windward inner surface is not less than three times the distance between the windward inner surface and the edge of the outer fin.

[0011] Preferably, the cross-sectional dimension of the protrusion gradually decreases in the direction approaching the outer fin. In the stacking direction, the length of the protrusion is not less than one-third of the length of the short seal.

[0012] Preferably, both the protrusion and the groove are arranged along the length direction of the short seal. The groove penetrates through the short seal. The number of protrusions is multiple, and the protrusions are arranged at intervals along the length direction of the short seal.

[0013] Preferably, the size of the protrusion is much smaller than the size of the groove.

[0014] Preferably, a straight section is provided between the groove and the connection surface.

[0015] Preferably, a weight-reducing hole is provided inside the short seal. The short seal is arranged along the length direction of the air passage, and the weight-reducing hole extends along the length direction of the short seal and penetrates through the short seal.

[0016] Preferably, a windward groove is provided on the windward outer surface of the short seal. The windward groove extends along the length direction of the short seal and penetrates through the short seal, and the windward groove is arranged in a manner approaching the connection surface.

[0017] Preferably, the plate-fin heat exchange core further includes:

[0018] Core body covers. One core body cover is respectively connected to each of the composite plates on both sides in the stacking direction;

[0019] Inner fins and long seals. The inner fins are arranged inside the water passage, and the long seals are hermetically connected to both sides in the width direction of the water passage, and the long seals are symmetrically arranged on both sides in the width direction of the water passage;

[0020] End caps. The end caps are communicated with the water passage, and the water passages adjacent in the stacking direction are communicated to form a water circulation passage.

[0021] Preferably, the surface of the base metal on the composite plate is covered with a layer of filler metal alloy. During brazing, the filler metal alloy melts to weld the inner fins, the outer fins, the long seals, the short seals and the composite plate into one body.

[0022] Compared with the prior art, the beneficial effects of the present utility model are:

[0023] 1. The plate-fin heat exchange core seals both sides in the width direction of the air channel through short seals. Grooves are formed on the short seals, and a gap is reserved between the edge of the protrusion and the inner wall of the groove, which can reduce the weight of the short seals.

[0024] 2. In the plate-fin heat exchange core, the end of the protrusion abuts against the edge of the outer fin, ensuring that there is sufficient clearance between the edge of the outer fin and the windward inner side surface, which is convenient for assembly and can prevent the edge of the outer fin from being warped due to the extrusion of the windward inner side surface during the welding process of the connection surface and the composite plate, resulting in poor welding.

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the air channel of a plate-fin heat exchange core according to the present invention;

[0027] Figure 2 It is a schematic diagram of the water channel of a plate-fin heat exchange core according to the present invention;

[0028] Figure 3 It is a plate-fin heat exchange core according to the present invention Figure 1 The enlarged schematic diagram at position A in it;

[0029] Figure 4 It is a schematic diagram of one perspective of the short seal of a plate-fin heat exchange core according to the present invention;

[0030] Figure 5 It is a schematic diagram of the cold air flow direction on a conventional solid seal;

[0031] Figure 6 It is a schematic diagram of the cold air flow direction on the short seal in a plate-fin heat exchange core according to the present invention.

[0032] In the figure: 100, composite plate; 101, air channel; 102, water channel; 200, outer fin; 300, short seal; 301, windward inner side surface; 3011, groove; 3012, protrusion; 3013, straight line segment; 302, windward outer side surface; 3021, windward groove; 303, connection surface; 304, weight reduction hole; 400, core cover plate; 500, inner fin; 600, long seal. Detailed Embodiments

[0033] The following description is used to elaborate the present utility model in detail so that those skilled in the art can implement it. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description of the present utility model can be applied to other implementation schemes, variant schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present utility model.

[0034] Please refer to Figures 1-4 , the present utility model provides a technical solution: a plate-fin heat exchange core, including:

[0035] A plurality of composite plates 100, the composite plates 100 are arranged at intervals along the stacking direction, and a cooling channel is provided between adjacent composite plates 100. The number of the cooling channels is multiple, which are respectively an air channel 101 and a water channel 102. The air channel 101 and the water channel 102 are arranged alternately along the stacking direction, and the length direction of the water channel 102 and the length direction of the air channel 101 are arranged in a staggered manner;

[0036] Preferably, the length direction of the water channel 102 and the length direction of the air channel 101 are perpendicular to each other;

[0037] An outer fin 200 and a short seal 300, the outer fin 200 is arranged inside the air channel 101, and the short seal 300 is hermetically connected to both sides in the width direction of the air channel 101; Preferably, the short seals 300 are symmetrically distributed on both sides in the width direction of the air channel 101, and the short seals 300 can also play a role in strengthening and supporting the air channel 101;

[0038] The short seal 300 is provided with an opposite windward inner side 301 and a windward outer side 302 and a connecting surface 303 extending between the windward inner side 301 and the windward outer side 302, and the windward inner side 301 faces the outer fin 200;

[0039] A groove 3011 is formed in the middle of the windward inner side 301, and a protrusion 3012 extends from the middle of the bottom surface of the groove 3011 towards the outer fin 200. In the width direction of the air channel 101, the end of the protrusion 3012 abuts against the edge of the outer fin 200, and the straight line segment 3013 is spaced from the edge of the outer fin 200. In other words, the shortest distance from the windward inner side 301 to the windward outer side 302 is less than the shortest distance from the windward outer side 302 to the end of the protrusion 3012. In the stacking direction, the edge of the protrusion 3012 is spaced from the inner wall of the groove 3011.

[0040] The two sides of the air duct 101 in the width direction are sealed by the short seal 300. Grooves 3011 are formed on the short seal 300, and a gap is reserved between the edge of the protrusion 3012 and the inner wall of the groove 3011, which can reduce the weight of the short seal 300;

[0041] The end of the protrusion 3012 abuts against the edge of the outer fin 200 to ensure that there is sufficient clearance between the edge of the outer fin 200 and the straight line segment 3013, which is convenient for assembly and can prevent the edge of the outer fin 200 from being squeezed and warped by the straight line segment 3013 during the welding process of the connection surface 303 and the composite plate 100, resulting in poor welding.

[0042] In the stacking direction, the length of the protrusion 3012 is not less than one-third of the length of the short seal 300. With the above limitation, the overall brazing strength of the seal can be increased, and the strength will not be reduced at high temperatures, ensuring the brazing quality.

[0043] The cross-sectional size of the protrusion 3012 gradually decreases in the direction close to the outer fin 200. Preferably, the cross-sectional shape of the protrusion 3012 is triangular. By defining the shape of the protrusion 3012, the stability of the connection between the protrusion 3012 and the short seal 300 is ensured. Compared with the conventional rectangular protrusion 3012, the triangular protrusion 3012 has a smaller size while ensuring stability. On the premise of using the same material, the protrusion 3012 with a smaller size has a smaller weight, thereby reducing the overall weight.

[0044] Furthermore, the size of the protrusion 3012 is much smaller than the size of the groove 3011. Preferably, the size of the protrusion 3012 is not greater than one-half of the size of the groove 3011.

[0045] Both the protrusion 3012 and the groove 3011 extend along the length direction of the short seal 300, and the groove 3011 penetrates through the short seal 300. With the above limitation, stable support of the protrusion 3012 for the outer fin 200 is achieved, and the edge of the outer fin 200 is prevented from interfering with the installation of the short seal 300. The groove 3011 that penetrates through the short seal 300 in the length direction can allow cold air to pass through, increasing the overall heat exchange area. Optionally, the number of the protrusions 3012 is multiple, and the protrusions 3012 are arranged at intervals along the length direction of the short seal 300 to further reduce the weight of the short seal 300.

[0046] A straight line segment 3013 is provided between the groove 3011 and the connection surface 303. One straight line segment 3013 is provided on each of the two sides of the windward inner side surface 301 in the stacking direction. The purpose of the straight line segment 3013 is to enhance the strength of the short seal 300, increase the brazing surface, and improve the brazing quality;

[0047] The short seal 300 is internally provided with weight-reducing holes 304. The short seal 300 is arranged along the length direction of the air duct 101, and the weight-reducing holes 304 extend along the length direction of the short seal 300 and penetrate through the short seal 300. In one embodiment of the present invention, the number of the weight-reducing holes 304 is one, and the weight-reducing hole 304 is located at the central position of the short seal 300. By adding the weight-reducing holes 304, the weight of the short seal 300 is reduced, meeting the requirement of the core body for lightweight. The cold air in the length direction of the air duct 101 can flow through the weight-reducing holes 304, thereby increasing the ventilation volume. Preferably, the cross-section of the weight-reducing hole 304 is circular. Refer to Figure 5 , when the cold air blows to the conventional seal, the cold air rebounds vertically. When the cold air blows to the short seal 300 of the present application, refer to Figure 6 , part of the cold air can pass through the short seal 300 until the back of the core body, taking away the heat to the greatest extent, improving the cooling efficiency of the core body, and at the same time achieving the purpose of weight reduction.

[0048] The windward outer side surface 302 of the short seal 300 is provided with a windward groove 3021. The windward groove 3021 extends along the length direction of the short seal 300 and penetrates through the short seal 300. This design can reduce the weight of the seal and increase the windward area. During the high-temperature brazing process, the windward groove 3021 can receive the excess accumulated brazing filler metal, making the plate-fin heat exchanger more beautiful. For the windward groove 3021 to receive the excess accumulated brazing filler metal conveniently, further, the windward groove 3021 is arranged in a manner close to the joint surface 303.

[0049] The cross-sectional dimension of the windward groove 3021 gradually decreases in a direction away from the windward outer side surface 302. Preferably, the cross-section of the windward groove 3021 is V-shaped.

[0050] In one embodiment of the present invention, the number of the windward grooves 3021 is two, and the windward grooves 3021 are arranged at intervals along the stacking direction, and the two windward grooves 3021 are parallel to each other.

[0051] The plate-fin heat exchange core further includes:

[0052] Core body cover plates 400. The composite plates 100 on both sides in the stacking direction are respectively laid flat on one core body cover plate 400;

[0053] Inner fins 500 and long seals 600. The inner fins 500 are arranged inside the water duct 102, and the long seals 600 are hermetically connected to both sides in the width direction of the water duct 102, and the long seals 600 are symmetrically arranged on both sides in the width direction of the water duct 102;

[0054] A head, the head is communicated with the water channel 102, and the water channels 102 adjacent in the stacking direction are communicated to form a water circulation channel.

[0055] The surface of the base metal on the composite plate 100 is covered with a layer of filler alloy. During brazing, the filler alloy melts to weld the inner fins 500, the outer fins 200, the long seal 600, the short seal 300 and the composite plate 100 into one body. The composite plate 100 separates adjacent two layers of channels. The hot water transfers heat to the outer fins 200 through the inner fins 500 and the composite plate 100, and the outer fins 200 take away the heat through the cold air, thereby playing a role in reducing the water temperature. The brazed integral core plate bundle, together with necessary heads, nozzles, flanges, etc., constitutes a plate-fin heat exchanger.

[0056] In summary, a weight reduction hole 304, a groove 3011 and a windward groove 3021 are designed in the middle part of the short seal 300, so as to reduce the overall weight of the core body and meet the requirement of core body lightweight. The weight reduction hole 304 and the windward groove 3021 can increase the ventilation volume. On the one hand, the protrusion 3012 serves to increase the strength. In addition, due to the dimensional difference between the protrusion 3012 and the straight line segment 3013, the protrusion 3012 presses the outer fin 200 to prevent the short seal 300 from pressing on the cut edge of the heat dissipation belt, which is convenient for assembly and welding fixation.

[0057] Compared with the traditional seal structure, the structure design of this plate-fin heat exchange core is more lightweight, practical, convenient for radiator lightweight, conducive to modular development, can reduce the processing production cost of the radiator, and has certain application value.

[0058] The above-described embodiments are only used to illustrate the technical ideas and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The scope of the patent adoption of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the scope of the patent of the present invention.

Claims

1. A plate-fin heat exchange core, characterized in that, Including: A plurality of composite plates (100), the composite plates (100) are arranged at intervals along the stacking direction, and air channels (101) and water channels (102) are arranged alternately between the composite plates (100); An outer fin (200) and a short seal (300), the outer fin (200) is arranged inside the air channel (101), the short seal (300) is hermetically connected to both sides in the width direction of the air channel (101), and opposite windward inner sides (301) and windward outer sides (302) and a connecting surface (303) extending between the windward inner side (301) and the windward outer side (302) are arranged on the short seal (300), wherein the windward inner side (301) faces the outer fin (200); A groove (3011) is formed in the middle of the windward inner side (301), and a protrusion (3012) extends from the middle of the bottom surface of the groove (3011) towards the outer fin (200). In the width direction of the air channel (101), the end of the protrusion (3012) abuts against the edge of the outer fin (200), and there is a gap between the windward inner side (301) and the edge of the outer fin (200). In the stacking direction, there is a gap between the edge of the protrusion (3012) and the inner wall of the groove (3011).

2. The finned heat exchange core according to claim 1 above, characterized in that, In the width direction of the air channel (101), the length by which the protrusion (3012) extends out of the windward inner side (301) is not less than three times the distance between the windward inner side (301) and the edge of the outer fin (200).

3. A plate-fin heat exchange core according to claim 1 above, characterized in that, The cross-sectional dimension of the protrusion (3012) gradually decreases in a manner close to the outer fin (200). In the stacking direction, the length of the protrusion (3012) is not less than one-third of the length of the short seal (300).

4. A finned heat exchange core according to claim 1 above, characterized in that, Both the protrusion (3012) and the groove (3011) are arranged along the length direction of the short seal (300), the groove (3011) penetrates the short seal (300), the number of the protrusions (3012) is multiple, and the protrusions (3012) are arranged at intervals along the length direction of the short seal (300).

5. A finned heat exchange core according to claim 1 above, characterized in that, The size of the protrusion (3012) is much smaller than the size of the groove (3011).

6. A plate-fin heat exchange core according to claim 1 above, characterized in that, A straight section (3013) is arranged between the groove (3011) and the connecting surface (303).

7. A plate-fin heat exchange core according to claim 1 above, characterized in that, A weight-reducing hole (304) is formed inside the short seal (300), the short seal (300) is arranged along the length direction of the air channel (101), and the weight-reducing hole (304) extends along the length direction of the short seal (300) and penetrates the short seal (300).

8. A plate-fin heat exchange core according to claim 1 above, characterized in that, An air-facing groove (3021) is formed in the air-facing outer side (302) of the short seal (300), the air-facing groove (3021) extends along the length direction of the short seal (300) and penetrates the short seal (300), and the air-facing groove (3021) is arranged in a manner close to the connecting surface (303).

9. A finned heat exchange core according to claim 1 above, characterized in that, Also including: The core cover plate (400), one of the core cover plates (400) is connected to each of the composite plates (100) located on both sides in the stacking direction; The inner fin (500) and the long seal (600), the inner fin (500) is arranged inside the water channel (102), the long seal (600) is hermetically connected to both sides in the width direction of the water channel (102), and the long seal (600) is symmetrically arranged on both sides in the width direction of the water channel (102); The end cap, the end cap is communicated with the water channel (102), and the adjacent water channels (102) in the stacking direction are communicated to form a water circulation channel.

10. A plate-fin heat exchange core according to claim 9 above, characterized in that, A layer of filler metal alloy is covered on the surface of the parent metal on the composite plate (100). During brazing, the filler metal alloy melts to weld the inner fin (500), the outer fin (200), the long seal (600), the short seal (300) and the composite plate (100) into one body.