Sealing strip for plate-fin heat exchanger

Abstract

The utility model provides a sealing strip for a plate-fin heat exchanger, which belongs to the field of heat exchanger design and comprises a sealing strip body, a first limiting component and a second limiting component. The first limiting assembly comprises two first extension parts; the two first extension parts are respectively arranged at the top and the bottom of the sealing strip body; the first extension part is plate-shaped; the rear plate face of the first extending part is flush with the rear side face of the seal strip body. The second limiting assembly comprises two second extension parts; the two second extending parts are arranged on the left side and the right side of the sealing strip body correspondingly. The second extension part comprises a first convex part and a second convex part; the first protruding part is located above the second protruding part. And the first lug boss and the second lug boss are arranged in opposite directions. The plate-fin heat exchanger can solve the problem that the plate-fin heat exchanger without the long sealing strip structure cannot be positioned and installed in the prior art, and the plate-fin heat exchanger without the long sealing strip structure can be conveniently installed.

Description

Technical Field

[0001] This utility model relates to the field of heat exchangers, and more particularly to a sealing strip for plate-fin heat exchangers. Background Technology

[0002] Plate-fin heat exchangers are heat exchange devices for cold recovery and energy transfer. Existing plate-fin heat exchangers typically consist of baffles, fins, and seals. Fins and seals are placed between adjacent baffles to form a sandwich unit. These sandwich units are stacked according to different fluid flow patterns and brazed into a whole.

[0003] In the existing technology, the sealing strip is usually a long, rectangular cubic structure. When assembling the plate-fin heat exchanger core, it is necessary to manually stack the baffles, sealing strips and fins layer by layer according to the preset arrangement, and at the same time, position and install each welding part, and check it. Then, the whole thing is transferred to a brazing furnace for heating, so that the connection parts of the baffles, sealing strips and fins are welded and fixed together. Because the positioning and installation work is relatively troublesome, the whole process is complicated and cumbersome.

[0004] To this end, Chinese patent application number 202122262350.3 discloses a sealing strip for easy assembly of heat exchangers. By inserting the heat exchanger's partition into the partition slot and locking it into the cubic cavity, the contact area between the sealing strip body and the partition is increased, enhancing the connection stability between the two. The side walls of the partition slot can restrict the displacement of the partition, preventing misalignment of the partition during welding. The partition slot can also play a positioning role for the installation of the partition.

[0005] Chinese patent application number 202321157014.5 discloses a plate-fin heat exchanger with a long seal-free structure, including a first cover plate, a second cover plate, and multiple sets of alternatingly stacked outer fin layers and inner fin layers located between the first cover plate and the second cover plate. The inner fin layer includes a first partition plate, a second partition plate, and inner fins located between the first partition plate and the second partition plate. The two ends of the opposite sides of the first partition plate and the second partition plate are respectively provided with a first boss and a second boss, which are arranged along the length direction of the plate-fin heat exchanger with the long seal-free structure.

[0006] If the above-mentioned seal is applied to a plate-fin heat exchanger with a lengthless seal structure, the first and second partitions are respectively provided with a first boss and a second boss on the opposite ends of the first and second partitions, and the first boss and the second boss need to be kept in a welded state. As a result, the first and second partitions cannot be inserted into the partition slot of the above-mentioned seal, and the plate-fin heat exchanger with a lengthless seal structure cannot be positioned and installed. Utility Model Content

[0007] To address the aforementioned problems, this utility model provides a sealing strip for plate-fin heat exchangers, which solves the problem that existing technologies cannot position and install plate-fin heat exchangers with a long sealing strip structure, thus enabling convenient installation of plate-fin heat exchangers with a long sealing strip structure.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] This utility model provides a sealing strip for a plate-fin heat exchanger, comprising a sealing strip body, a first limiting component, and a second limiting component;

[0010] The seal body is rectangular parallelepiped in shape;

[0011] The first limiting component includes two first extensions; the two first extensions are respectively disposed at the top and bottom of the seal body; the first extensions are plate-shaped; the first extensions are vertically arranged; the rear plate surface of the first extensions is flush with the rear side surface of the seal body; the length of the cross section of the first extension in the front-rear direction is less than the length of the cross section of the seal body in the front-rear direction.

[0012] The second limiting component includes two second extensions; the two second extensions are respectively disposed on the left and right sides of the seal body; the second extension includes a first protrusion and a second protrusion; the first protrusion and the second protrusion are fixed together; the first protrusion is located above the second protrusion; the first protrusion and the second protrusion are arranged in opposite directions;

[0013] When the seal body is located between the two inner fin layers, the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are both in close contact with the front plate surface of the first extension, the first protrusion is in close contact with the bottom of the second protrusion of the upper inner fin layer, and the second protrusion is in close contact with the top of the first protrusion of the lower inner fin layer.

[0014] The sealing strip for plate-fin heat exchangers provided by this utility model preferably has the first protrusion and the second protrusion in the shape of a frustum; the upper bottom surface of the first protrusion faces upward; and the upper bottom surface of the second protrusion faces downward.

[0015] The sealing strip for plate-fin heat exchangers provided by this utility model preferably has a weight-reducing groove on the front side wall of the sealing strip body to reduce the weight of the sealing strip body.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] The sealing strip for plate-fin heat exchangers provided by this utility model has plate-shaped first extensions at the top and bottom of the sealing strip body, so that the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are tightly attached to the front plate surface of the first extension. This restricts the left and right ends of the second partition of the upper inner fin layer and the first partition of the lower inner fin layer between the sealing strip body located on the left and right sides, keeping the second partition of the upper inner fin layer and the first partition of the lower inner fin layer flush in the left and right direction, which is beneficial to the positioning of the upper inner fin layer and the lower inner fin layer in the left and right direction. The length of the first extension is the same as the thickness of the first partition or the second partition, ensuring the welding thickness between the end cap and the heat exchanger core, while not affecting the flow of heat medium into the inner fin layer.

[0018] A second extension is provided on the left and right sides of the seal body. The second extension includes a first protrusion and a second protrusion. Since the first protrusion in the prior art is a downward protruding groove structure and the second protrusion is an upward protruding groove structure, the first protrusion is closely attached to the bottom of the second protrusion of the upper inner fin layer, and the second protrusion is closely attached to the top of the first protrusion of the lower inner fin layer. The first protrusion is embedded in the bottom groove of the second protrusion of the upper inner fin layer, and the second protrusion is embedded in the top groove of the first protrusion of the lower inner fin layer. This limits the second partition of the upper inner fin layer and the first partition of the lower inner fin layer in the front-back direction, keeping the second partition of the upper inner fin layer and the first partition of the lower inner fin layer flush in the front-back direction, which is beneficial for the positioning of the upper inner fin layer and the lower inner fin layer in the front-back direction.

[0019] The existing seals can be positioned by inserting partitions into partition slots. However, when applied to plate-fin heat exchangers with a long-seal-free structure, the first and second partitions have first and second protrusions on their opposite edges, respectively, and these protrusions need to be welded together. This prevents the first and second partitions from being inserted into the partition slots of the existing seals, thus hindering the positioning and installation of the long-seal-free plate-fin heat exchanger. The seal provided by this invention, however, applies horizontal constraints to the second partition of the upper inner fin layer and the first partition of the lower inner fin layer, thereby achieving effective positioning and installation within the long-seal-free plate-fin heat exchanger. Attached Figure Description

[0020] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not intentionally drawn to scale; the focus is on illustrating the gist of the invention.

[0021] Figure 1This is a three-dimensional structural diagram of a sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model.

[0022] Figure 2 This is a schematic diagram of the main structure of a sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0024] Example 1:

[0025] like Figures 1-2 As shown, Embodiment 1 of this utility model provides a sealing strip for a plate-fin heat exchanger, comprising a sealing strip body 1, a first limiting component 2, and a second limiting component 3;

[0026] The seal body 1 is rectangular in shape;

[0027] The first limiting component 2 includes two first extensions 21; the two first extensions 21 are respectively disposed at the top and bottom of the seal body 1; the first extensions 21 are plate-shaped; the first extensions 21 are vertically disposed; the rear plate surface of the first extensions 21 is flush with the rear side surface of the seal body 1; the length of the cross section of the first extensions 21 in the front-rear direction is less than the length of the cross section of the seal body 1 in the front-rear direction.

[0028] The second limiting component 3 includes two second extensions 31; the two second extensions 31 are respectively disposed on the left and right sides of the seal body 1; the second extension 31 includes a first protrusion 311 and a second protrusion 312; the first protrusion 311 and the second protrusion 312 are fixed together; the first protrusion 311 is located above the second protrusion 312; the first protrusion 311 and the second protrusion 312 are arranged in opposite directions;

[0029] When the seal body 1 is located between the two inner fin layers, the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are both in close contact with the front plate surface of the first extension 21, the first protrusion 311 is in close contact with the bottom of the second protrusion of the upper inner fin layer, and the second protrusion 312 is in close contact with the top of the first protrusion of the lower inner fin layer.

[0030] When using the sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model, the sealing strip body 1 is disposed between two inner fin layers, with the upper inner fin layer designated as the upper inner fin layer and the lower inner fin layer designated as the lower inner fin layer. The outer fin layer is located between the upper and lower inner fin layers, and the sealing strip body 1 is situated within the outer fin layer. The two sealing strip bodies 1 are respectively disposed on both sides of the outer fin, as in the case of a plate-fin heat exchanger with a non-long sealing strip structure in the prior art. Figure 1As shown, the front side of the sealing strip body 1 faces the outer fins, and the two sealing strip bodies 1 are arranged facing each other; the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are both closely attached to the front plate surface of the first extension 21, and the length of the first extension 21 is the same as the thickness of the first partition or the second partition, so that the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are kept flush in the left-right direction; such as the plate-fin heat exchanger with a long sealing strip structure in the prior art. Figure 2 As shown, the first boss is a downward-protruding groove structure, and the second boss is an upward-protruding groove structure. The first protrusion 311 is tightly attached to the bottom of the second boss of the upper inner fin layer, and the second protrusion 312 is tightly attached to the top of the first boss of the lower inner fin layer. The first protrusion 311 is embedded in the bottom groove of the second boss of the upper inner fin layer, and the second protrusion 312 is embedded in the top groove of the first boss of the lower inner fin layer, so that the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are kept flush in the front-back direction. The stacked heat exchanger core is transferred to a brazing furnace for heating, so that the connection of the partition, the seal and the fin is welded and fixed into one piece.

[0031] The sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model has plate-shaped first extensions 21 respectively provided at the top and bottom of the sealing strip body 1, so that the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are tightly attached to the front plate surface of the first extension 21. This restricts the left and right ends of the second partition of the upper inner fin layer and the first partition of the lower inner fin layer between the sealing strip body 1 located on the left and right sides, so that the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are kept flush in the left and right direction, which is beneficial to the positioning of the upper inner fin layer and the lower inner fin layer in the left and right direction. The length of the first extension 21 is the same as the thickness of the first partition or the second partition, which ensures the welding thickness between the end cap and the heat exchanger core, while not affecting the flow of heat medium into the inner fin layer.

[0032] A second extension 31 is provided on the left and right sides of the sealing body 1. The second extension 31 includes a first protrusion 311 and a second protrusion 312. Since the first protrusion in the prior art is a downward protruding groove structure and the second protrusion is an upward protruding groove structure, the first protrusion 311 is closely attached to the bottom of the second protrusion of the upper inner fin layer, and the second protrusion 312 is closely attached to the top of the first protrusion of the lower inner fin layer. The first protrusion 311 is embedded in the bottom groove of the second protrusion of the upper inner fin layer, and the second protrusion 312 is embedded in the top groove of the first protrusion of the lower inner fin layer. This limits the second partition of the upper inner fin layer and the first partition of the lower inner fin layer in the front-back direction, keeping the second partition of the upper inner fin layer and the first partition of the lower inner fin layer flush in the front-back direction, which is beneficial for the positioning of the upper inner fin layer and the lower inner fin layer in the front-back direction.

[0033] The existing seals can be positioned by inserting partitions into partition slots. However, when applied to plate-fin heat exchangers with a long-seal-free structure, the first and second partitions have first and second protrusions on their opposite edges, respectively, and these protrusions need to be welded together. This prevents the first and second partitions from being inserted into the partition slots of the existing seals, thus hindering the positioning and installation of the long-seal-free plate-fin heat exchanger. By using the seal for plate-fin heat exchangers provided in Embodiment 1 of this invention, the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are horizontally limited, thereby achieving the desired positioning and installation effect within the long-seal-free plate-fin heat exchanger.

[0034] like Figures 1-2 As shown, the sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model preferably has a first protrusion 311 and a second protrusion 312 in the shape of a frustum; the upper bottom surface of the first protrusion 311 faces upward; the upper bottom surface of the second protrusion 312 faces downward; the cross-section of the frustum-shaped first protrusion 311 gradually increases from top to bottom, so that when the second protrusion of the upper inner fin layer contacts the first protrusion 311, it is easy for the first protrusion 311 to be introduced. The upper bottom surface of the first protrusion 311 is a plane, and when it contacts the bottom of the groove of the second protrusion of the upper inner fin layer, it can keep the second partition of the upper inner fin layer horizontally placed and prevent the heat exchanger core from tilting; the second protrusion 312 has the same effect as the first protrusion 311.

[0035] like Figures 1-2 As shown, the sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model preferably has a weight-reducing groove 11 on the front side wall of the sealing strip body 1 for reducing the weight of the sealing strip body 1; the weight-reducing groove 11 can reduce the overall weight of the heat exchanger core and reduce the transportation cost of the heat exchanger; at the same time, by setting the weight-reducing groove 11, the material used to prepare the sealing strip can be reduced, thereby reducing the manufacturing cost of the heat exchanger core.

[0036] In summary, the sealing strip for plate-fin heat exchangers provided by this utility model can solve the problem that the existing technology cannot position and install plate-fin heat exchangers with a long sealing strip structure, thus realizing convenient installation of plate-fin heat exchangers with a long sealing strip structure.

[0037] Those skilled in the art should understand that variations can be implemented by combining existing technology and the above embodiments, and will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0038] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of this utility model, or equivalent embodiments with equivalent changes, do not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A sealing strip for a plate-fin heat exchanger, characterized in that, Includes the seal body, the first limiting component, and the second limiting component; The seal body is rectangular parallelepiped in shape; The first limiting component includes two first extensions; the two first extensions are respectively disposed at the top and bottom of the seal body; the first extensions are plate-shaped; the first extensions are vertically arranged; the rear plate surface of the first extensions is flush with the rear side surface of the seal body; the length of the cross section of the first extension in the front-rear direction is less than the length of the cross section of the seal body in the front-rear direction. The second limiting component includes two second extensions; the two second extensions are respectively disposed on the left and right sides of the seal body; the second extension includes a first protrusion and a second protrusion; the first protrusion and the second protrusion are fixed together; the first protrusion is located above the second protrusion; the first protrusion and the second protrusion are arranged in opposite directions; When the seal body is located between the two inner fin layers, the second partition of the upper inner fin layer and the first partition of the lower inner fin layer are both in close contact with the front plate surface of the first extension, the first protrusion is in close contact with the bottom of the second protrusion of the upper inner fin layer, and the second protrusion is in close contact with the top of the first protrusion of the lower inner fin layer.

2. The sealing strip for a plate-fin heat exchanger as described in claim 1, characterized in that, The first protrusion and the second protrusion are frustum-shaped; the upper bottom surface of the first protrusion faces upward; the upper bottom surface of the second protrusion faces downward.

3. The sealing strip for a plate-fin heat exchanger as described in claim 1, characterized in that, The front sidewall of the seal body is provided with a weight-reducing groove to reduce the weight of the seal body.

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