A gasket for plate-fin heat exchangers

Abstract

This utility model provides a sealing strip for plate-fin heat exchangers, relating to the field of heat exchangers. It includes a sealing strip body extending in a front-to-back direction; an inner cavity formed within the sealing strip body; an opening on the right side of the sealing strip body communicating with the inner cavity; several insertion slots on the upper side wall of the inner cavity communicating with the external space; several slots on the lower side wall of the inner cavity; one insertion slot corresponding to one slot; and several insert plates. Each insert plate passes through an insertion slot from top to bottom and is inserted into a slot; the insert plate is in close contact with the side wall of the inner cavity; the insert plate is flush with the upper surface of the sealing strip body; and the plate surface faces the opening. This utility model solves the problem in existing technologies where, after prolonged use, coolant corrodes and perforates the sealing strip, leading to coolant leakage and affecting the normal operation of the heat exchanger. It improves the corrosion resistance of the sealing strip, prevents coolant leakage, and extends the service life of the heat exchanger.

Description

Technical Field

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

[0002] Plate-fin heat exchangers are efficient and compact heat exchange devices, typically composed of baffles, fins, seals, and guide vanes. A specific structure is illustrated in the plate-fin core of an aluminum plate-fin heat exchanger disclosed in Chinese Patent Application No. 202322480619.4. This core includes heat dissipation channels disposed on a core cover plate, composed of multiple spaced composite plates forming staggered air-cooling and water-cooling channels between adjacent composite plates; outer fins disposed within the air-cooling channels, with short seals symmetrically arranged on both sides of the outer fins; and inner fins disposed within the water-cooling channels, with long seals symmetrically arranged on both sides of the inner fins.

[0003] The structure of the seal is as disclosed in Chinese Patent Application No. 201320877909.6, which discloses a heat exchanger seal. The seal body includes an upper strip arranged horizontally at the top, a connecting strip arranged vertically in the middle, and a lower strip arranged horizontally at the bottom. The connecting strip has slots on both sides, and the seal body is in the shape of an I-beam.

[0004] When the above-mentioned seals are used in plate-fin heat exchangers, coolant flows in the water-cooled channel used for heat exchange with the air-cooled channel. However, coolant is usually corrosive and will corrode the seals after long-term use. If the coolant corrodes and perforates the seals, it will cause coolant leakage and affect the normal use of the heat exchanger. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a sealing strip for plate-fin heat exchangers, which solves the problem that in existing technologies, if the coolant corrodes and perforates the sealing strip after prolonged use, it will lead to coolant leakage and affect the normal operation of the heat exchanger; thereby improving the corrosion resistance of the sealing strip, preventing coolant leakage, and extending the service life of the heat exchanger.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a sealing strip for a plate-fin heat exchanger, including a sealing strip body; the sealing strip body extends in a front-to-back direction; the sealing strip body has an inner cavity; the right side of the sealing strip body has an opening; the opening communicates with the inner cavity.

[0008] The upper sidewall of the inner cavity has several insertion ports; the insertion ports communicate with the external space; the lower sidewall of the inner cavity has several slots; one insertion port corresponds to one slot; it also includes several insert plates; the insert plates pass through the insertion ports from top to bottom and are inserted into the slots; the insert plates are in close contact with the sidewall of the inner cavity; the insert plates are flush with the upper surface of the seal body; the plate surface of the insert plates faces the opening.

[0009] The sealing strip for the plate-fin heat exchanger provided by this utility model preferably includes two metal composite plates and an aluminum plate; the two metal composite plates are respectively fixed to the two sides of the aluminum plate; the metal composite plates are the same size as the aluminum plate; and the metal composite plates overlap the aluminum plate.

[0010] The sealing strip for a plate-fin heat exchanger provided by this utility model preferably further includes several heat insulation plates; the heat insulation plates are the same size as the insert plates; the heat insulation plates pass through the insert from top to bottom and are inserted into the slot; the heat insulation plates are in close contact with the inner cavity sidewall; the heat insulation plates and the insert plates are alternately arranged; the heat insulation plates are flush with the upper surface of the sealing strip body; the insert plates are arranged adjacent to the opening.

[0011] The sealing strip for the plate-fin heat exchanger provided by this utility model preferably has rounded edges on the body of the sealing strip and a rounded rectangular cross-section for the inner cavity.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] The sealing strip for plate-fin heat exchangers provided by this utility model includes a sealing strip body. To facilitate the explanation of the structure of the sealing strip body, the sealing strip body is provided to extend in the front-back direction. In order to reduce the production cost of the sealing strip body, the sealing strip body is provided with an inner cavity, thereby reducing the raw material loss used to prepare the sealing strip body and reducing the weight of the sealing strip body, thereby reducing the overall weight of the heat exchanger core and facilitating the assembly and transportation of the heat exchanger.

[0014] Furthermore, an opening is provided on the right side of the seal body, which communicates with the inner cavity. When the coolant flows through the channel formed between the two seal bodies, the coolant can enter the inner cavity for buffering, reducing the load of the coolant on the inner fin layer and effectively improving the stability of the heat exchanger core.

[0015] Furthermore, the coolant flowing within the inner fin layer is used to cool other equipment. However, coolant is typically corrosive, easily corroding the seal body of the inner fin layer. If the seal body is corroded and perforated by the coolant, coolant leakage can occur, affecting the heat exchanger's operation and preventing proper cooling of external equipment. To address this, several inlets are provided on the upper side wall of the inner cavity, communicating with the external space. Several slots are provided on the lower side wall of the inner cavity, with one inlet corresponding to one slot. Several insert plates are also included; these plates pass through the inlets from top to bottom and are inserted into the slots. The inlets and slots limit the insertion of the plates, allowing them to be fixed within the inlets and slots. When the plates are inserted into the inlets and slots, they are in close contact with the inner cavity sidewalls, with the plate surface facing the opening, thus blocking the coolant. By using multiple plates, the previous plate can be positioned to block the subsequent... The protection provided by a single insert plate prevents the coolant from corroding and perforating subsequent insert plates at the same location, thus reducing the efficiency of coolant corrosion and effectively blocking coolant corrosion. Simultaneously, multiple insert plates divide the internal cavity into several leak-proof spaces. If a previous insert plate is corroded and perforated, the coolant exposed through the hole will enter the leak-proof space, preventing coolant leakage. Meanwhile, another part of the internal cavity can continue to buffer the coolant. Furthermore, the presence of internal cavities and openings in the seal body reduces its structural strength. The insert plates improve the overall structural strength of the seal body, effectively enhancing the stability of the heat exchanger core. It should be noted that to avoid insufficient contact between the seal body and the upper partition plate due to insert plate length issues, the insert plates are flush with the upper surface of the seal body.

[0016] By using insert plates in conjunction with slots and sockets, the number of insert plates used can be controlled, thereby effectively controlling the production cost of the seal body. At the same time, compared with directly creating anti-leakage gaps and buffer spaces on the seal body, using insert plates in conjunction with slots and sockets improves the production efficiency of the seal body.

[0017] In existing technologies, if the coolant corrodes and perforates the seal after prolonged use, it will lead to coolant leakage and affect the normal operation of the heat exchanger. The plate-fin heat exchanger seal provided by this utility model, by setting several insert plates in the inner cavity, can reduce the efficiency of coolant corrosion and perforation of the seal body, effectively block coolant corrosion, prevent coolant leakage, and extend the service life of the heat exchanger. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a three-dimensional structural diagram of the sealing strip for the plate-fin heat exchanger provided in Embodiment 1 of this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram of the sealing strip for the plate-fin heat exchanger provided in Embodiment 1 of this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the sealing strip for the plate-fin heat exchanger provided in Embodiment 1 of this utility model after removing the insert plate and the heat insulation plate.

[0022] Figure 4 This is a schematic diagram of the structure of the insert plate in the sealing strip of the 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 1-3 As shown, Embodiment 1 of this utility model provides a sealing strip for a plate-fin heat exchanger, including a sealing strip body 0; the sealing strip body 0 extends in the front-back direction; the sealing strip body 0 has an inner cavity 01; the right side of the sealing strip body 0 has an opening 02; the opening 02 communicates with the inner cavity 01.

[0026] The upper side wall of the inner cavity 01 is provided with several insertion ports 011; the insertion ports 011 communicate with the external space; the lower side wall of the inner cavity 01 is provided with several slots 012; one insertion port 011 corresponds to one slot 012; it also includes several insert plates 1; the insert plates 1 pass through the insertion ports 011 from top to bottom and are inserted into the slots 012; the insert plates 1 are in close contact with the side wall of the inner cavity 01; the insert plates 1 are flush with the upper surface of the seal body 0; the plate surface of the insert plates 1 is set facing the opening 02.

[0027] When using the plate-fin heat exchanger sealing strip provided in Embodiment 1 of this utility model, several insert plates 1 are inserted from the top of the sealing strip body 0 according to the required number. Specifically, the insert plate 1 is inserted into the inner cavity 01 through the insertion port 011 and embedded in the slot 012. At this time, the edge of the insert plate 1 is in close contact with the side wall of the inner cavity 01, and the insert plate 1 is fixed in the insertion port 011 and the slot 012. The sealing strip body 0 is placed between two partition plates, which are horizontally arranged. The upper partition plate is used as the upper partition plate, and the lower partition plate is used as the lower partition plate, so that the upper surface of the sealing strip body 0 and the lower surface are aligned. The surfaces are in close contact with the lower surface of the upper partition and the upper surface of the lower partition, respectively; the two sealing strip bodies 0 and the two partitions form a channel for the flow of coolant, namely the inner fin layer. Specifically, the openings of the two sealing strip bodies 0 are arranged opposite each other in the inner fin layer; the inner fin layer and the outer fin layer are alternately arranged to form the heat exchanger core, and the stacked heat exchanger core is transferred to a brazing furnace for heating, so that the partitions, sealing strips and fins are welded and fixed as a whole; when the coolant enters the inner fin layer, the coolant is located between the two sealing strip bodies 0, and the coolant is blocked and guided by the insert plate 1.

[0028] The sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model includes a sealing strip body 0. To facilitate the explanation of the structure of the sealing strip body 0, the sealing strip body 0 is provided to extend in the front-back direction. In order to reduce the production cost of the sealing strip body 0, the sealing strip body 0 is provided with an inner cavity 01, thereby reducing the raw material loss used to prepare the sealing strip body 0, and reducing the weight of the sealing strip body 0, thereby reducing the overall weight of the heat exchanger core, which facilitates the assembly and transportation of the heat exchanger.

[0029] Furthermore, an opening 02 is provided on the right side of the seal body 0, and the opening 02 is connected to the inner cavity 01. When the coolant flows from the channel formed between the two seal bodies 0, the coolant can enter the inner cavity 01 for buffering, reducing the load of the coolant on the inner fin layer and effectively improving the stability of the heat exchanger core.

[0030] Furthermore, the coolant flowing within the inner fin layer is used to cool other equipment. However, coolant is typically corrosive, easily corroding the seal body 0 of the inner fin layer. If the seal body 0 is corroded and perforated by the coolant, coolant leakage can easily occur, affecting the heat exchanger's operation and preventing proper cooling of external equipment. To address this, several insertion ports 011 are provided on the upper side wall of the inner cavity 01, communicating with the external space. Several slots 012 are provided on the lower side wall of the inner cavity 01. A socket 011 corresponds to a slot 012, and also includes several insert plates 1. The insert plates 1 pass through the socket 011 from top to bottom and are inserted into the slot 012. The socket 011 and slot 012 limit the insertion plate 1, allowing it to be fixed within the socket 011 and slot 012. When the insert plate 1 is inserted into the socket 011 and slot 012, it is in close contact with the side wall of the inner cavity 01, and the plate surface of the insert plate 1 faces the opening 02, thereby achieving the blocking of coolant through the insert plate 1. By setting multiple... Each insert plate 1 can protect the next insert plate 1 from corrosion. When the coolant corrodes and perforates the previous insert plate 1, the coolant cannot continue to corrode the next insert plate 1 at the same location, reducing the efficiency of the coolant's corrosion and perforation of the seal body 0, and effectively blocking coolant corrosion. At the same time, multiple insert plates 1 divide part of the inner cavity 01, forming several anti-leakage spaces. If the previous insert plate 1 is corroded and perforated, the coolant exposed from the hole will enter the anti-leakage space, preventing coolant leakage. The other part of the inner cavity 01 can continue to buffer the coolant. Meanwhile, since the seal body 0 has an inner cavity 01 and an opening 02, the structural strength of the seal body 0 is reduced. By setting several insert plates 1, the overall structural strength of the seal body 0 can be improved, thereby effectively improving the stability of the heat exchanger core. It should be noted that, in order to avoid the seal body 0 not being able to make close contact with the upper partition due to the length of the insert plate 1, the upper surface of the insert plate 1 and the seal body 0 should be flush.

[0031] By using the insertion plate 1 in conjunction with the insertion port 011 and the slot 012, the number of insertion plates 1 used can be controlled, thereby effectively controlling the production cost of the seal body 0. At the same time, by using the insertion plate 1 in conjunction with the insertion port 011 and the slot 012, compared with directly opening the anti-leakage gap and buffer space on the seal body 0, the production efficiency of the seal body 0 is improved.

[0032] In the prior art, if the coolant corrodes and perforates the seal after prolonged use, it will cause coolant leakage and affect the normal use of the heat exchanger. The plate-fin heat exchanger seal provided in Embodiment 1 of this utility model can reduce the corrosion and perforation efficiency of the coolant on the seal body 0 by setting several insert plates 1 in the inner cavity 01, effectively blocking coolant corrosion, preventing coolant leakage, and extending the service life of the heat exchanger.

[0033] like Figure 4As shown, the sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model, preferably, in order to further reduce the corrosion perforation efficiency of the coolant, specifically, the insert plate 1 includes two metal composite plates 11 and an aluminum plate 12; the two metal composite plates 11 are respectively fixed to the two side surfaces of the aluminum plate 12; the metal composite plates 11 and the aluminum plate 12 are the same size; the metal composite plates 11 and the aluminum plate 12 overlap; when the coolant corrodes the insert plate 1, since the aluminum plate 12 and the metal composite plate 11 are corroded differently, when the metal composite plate 11 or the aluminum plate 12 is corroded and perforated, corrosion may occur at other locations on the aluminum plate 12 or the metal composite plate 11. The probability of the metal composite plate 11 and the aluminum plate 12 forming corrosion perforation at the same location is low. Compared with the insert plate 1 using only one material, the use of a multi-layer plate structure can reduce the possibility of perforation of the insert plate 1 and improve the corrosion resistance of the insert plate 1; at the same time, the multi-layer plate structure ensures the strength of the insert plate 1, thereby improving the overall structural strength of the sealing strip body 0, and thus effectively improving the stability of the heat exchanger core.

[0034] like Figure 2 As shown, the sealing strip for the plate-fin heat exchanger provided in Embodiment 1 of this utility model preferably has a high temperature when the coolant flowing inside the inner fin layer is used to cool other equipment. If the coolant directly contacts the sealing strip body 0, it can easily cause thermal stress in the sealing strip body 0, leading to damage. Furthermore, the two sides of the sealing strip body 0 are relatively cold and hot, further exacerbating the stress. To reduce the stress in the sealing strip body 0 and prevent damage, specifically, it also includes several heat insulation plates 2. These heat insulation plates 2 separate the temperatures at both ends of the sealing strip body 0, reducing the stress generated in the sealing strip body 0. To allow the heat insulation plates 2 to be inserted into the insertion port 011 and slot 012, and to enable the heat insulation plates 2 to effectively block heat transfer, The heat insulation plate 2 is the same size as the insert plate 1. The heat insulation plate 2 is passed through the insertion port 011 from top to bottom and inserted into the slot 012. The heat insulation plate 2 is fixed by the insertion port 011 and the slot 012, so that the heat insulation plate 2 is in close contact with the side wall of the inner cavity 01, reducing the heat conduction capacity at both ends of the seal body 0. By alternately setting the heat insulation plate 2 and the insert plate 1, a balance can be achieved between the heat insulation and corrosion resistance of the seal body 0. It should be noted that in order to avoid the seal body 0 not being able to make close contact with the upper partition due to the length of the heat insulation plate 2, the heat insulation plate 2 is flush with the upper surface of the seal body 0. Since the heat insulation plate 2 is added here, in order to maintain the heat insulation and corrosion resistance effect, the insert plate 1 is set near the opening 02 so that the insert plate 1 can protect the heat insulation plate 2 and maintain a good heat insulation effect.

[0035] The sealing strip for the plate-fin heat exchanger provided in Embodiment 1 of this utility model preferably diffuses the stress generated by heating toward the edges of the sealing strip body 0, making the rectangular sealing strip body 0 prone to stress concentration at the edges and corners, which can lead to stress damage to the sealing strip body 0. To avoid stress damage to the sealing strip body 0 caused by high temperature, specifically, the edges of the sealing strip body 0 are rounded, and the cross-section of the inner cavity 01 is rounded rectangle. By using arc-shaped sides instead of edges, the stress transitions smoothly at the rounded corners, avoiding extremely high stress peaks at right angles or edges, and making the stress evenly distributed at the arc-shaped sides, thereby avoiding damage to the sealing strip body 0 due to stress concentration.

[0036] In summary, the sealing strip for plate-fin heat exchangers provided by this utility model can solve the problem in the prior art where, after prolonged use, the coolant corrodes and perforates the sealing strip, leading to coolant leakage and affecting the normal operation of the heat exchanger; it improves the corrosion resistance of the sealing strip, prevents coolant leakage, and extends the service life of the heat exchanger.

[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 seal for a plate-fin heat exchanger, characterized by Includes a seal body; the seal body extends in a front-to-back direction; the seal body has an inner cavity; the right side of the seal body has an opening; the opening communicates with the inner cavity; The upper sidewall of the inner cavity has several insertion ports; the insertion ports communicate with the external space; the lower sidewall of the inner cavity has several slots; one insertion port corresponds to one slot; it also includes several insert plates; the insert plates pass through the insertion ports from top to bottom and are inserted into the slots; the insert plates are in close contact with the sidewall of the inner cavity; the insert plates are flush with the upper surface of the seal body; the plate surface of the insert plates faces the opening.

2. The gasket for a plate-fin heat exchanger according to claim 1, wherein The insert plate includes two metal composite plates and an aluminum plate; the two metal composite plates are respectively fixed to the two sides of the aluminum plate; the metal composite plates are the same size as the aluminum plate; the metal composite plates overlap the aluminum plate.

3. The gasket for a plate-fin heat exchanger according to claim 2, wherein It also includes several heat insulation plates; the heat insulation plates are the same size as the insert plates; the heat insulation plates pass through the insertion opening from top to bottom and are inserted into the slot; the heat insulation plates are in close contact with the inner cavity sidewall; the heat insulation plates and the insert plates are alternately arranged; the heat insulation plates are flush with the upper surface of the sealing strip body; the insert plates are arranged adjacent to the opening.

4. The sealing strip for a plate-fin heat exchanger as described in claim 1, characterized in that, The edges of the seal body are rounded; the cross-section of the inner cavity is rounded rectangular.

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