A gasket for plate-fin heat exchangers

Abstract

This utility model provides a sealing strip for a plate-fin heat exchanger, relating to the field of heat exchangers. It includes a sealing strip body extending in a front-to-back direction; an inner cavity formed in the sealing strip body; an opening on the right side of the sealing strip body communicating with the inner cavity; and several first flow-dividing components and several second flow-dividing components. Each first flow-dividing component includes two first flow-dividing plates; the front ends of the two first flow-dividing plates are adjacent, forming an acute angle; a gap exists between the two first flow-dividing plates. Each second flow-dividing component includes two second flow-dividing plates; the rear ends of the two second flow-dividing plates are adjacent, forming an obtuse angle; a gap exists between the two second flow-dividing plates. The first and second flow-dividing components are alternately arranged. This utility model solves the problem in existing technologies where, if the coolant flows for a short time in the water-cooling channel, the coolant cannot fully contact the fins, thus reducing the heat exchange efficiency of the plate-fin 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 flow dividers. 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 in the air-cooling channels, with short seals symmetrically arranged on both sides of the outer fins; and inner fins disposed in 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 seal is used in a plate-fin heat exchanger, coolant flows in the water-cooled channel used for heat exchange with the air-cooled channel. The coolant flows smoothly along the extension direction of the seal and transfers heat through the fins. If the coolant flows in the water-cooled channel for a short time, the coolant cannot fully contact the fins, thereby reducing the heat exchange efficiency of the plate-fin 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, when the coolant flows smoothly along the extension direction of the sealing strip, if the coolant's flow time in the water-cooling channel is short, the coolant cannot fully contact the fins, thus reducing the heat exchange efficiency of the plate-fin heat exchanger; thereby improving the heat exchange efficiency of the plate-fin 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] It also includes several first-level splitting components and several second-level splitting components;

[0009] The first diversion assembly includes two first diversion plates; the surface of the first diversion plate is perpendicular to the left side wall of the inner cavity; the two first diversion plates are placed one above the other; the front ends of the two first diversion plates are adjacent to each other and form an acute angle; there is a gap between the two first diversion plates.

[0010] The second diversion assembly includes two second diversion plates; the surface of the second diversion plate is perpendicular to the left side wall of the inner cavity; the two second diversion plates are placed vertically; the rear ends of the two second diversion plates are adjacent to each other and form an obtuse angle; there is a gap between the two second diversion plates;

[0011] The first diverter component and the second diverter component are alternately arranged; if the first diverter component is provided in front of the second diverter component, the rear end of the first diverter plate extends into the front end gap between the two second diverter plates; if the first diverter component is provided in rear of the second diverter component, the front end of the first diverter plate extends into the rear end gap between the two second diverter plates.

[0012] The sealing strip for the plate-fin heat exchanger provided by this utility model preferably further includes a turbulence column; the turbulence column is vertically arranged; the cross-section of the turbulence column is an equilateral triangle; the top of the turbulence column is fixed to the upper side wall of the inner cavity, and the bottom of the turbulence column is fixed to the lower side wall of the inner cavity.

[0013] All the aforementioned turbulence-dispersing columns are equidistantly distributed; all the aforementioned turbulence-dispersing columns are arranged along the front-to-back direction.

[0014] The sealing strip for the plate-fin heat exchanger provided by this utility model preferably has a plurality of protrusions on the left side wall of the inner cavity; the protrusions are located between the first flow splitting assembly and the second flow splitting assembly.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] 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 extends in the front-to-back direction. In order to reduce the production cost of the sealing strip body, the sealing strip body has 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.

[0017] Furthermore, an opening is provided on the right side of the seal body; the opening communicates with the inner cavity, and when the coolant flows from 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.

[0018] Furthermore, since the coolant flows smoothly in the inner fin layer along the extension direction of the seal, the coolant has a short flow time in the inner fin layer, resulting in a short contact time with the fins and an inability to effectively dissipate heat to the outside through the fins. Therefore, it is necessary to extend the flow time of the coolant in the inner fin layer or increase the heat exchange efficiency per unit time to improve the cooling effect of the coolant. Specifically, it also includes several first flow distribution components and several second flow distribution components.

[0019] The first flow splitter assembly includes two first flow splitter plates; the plate surface of the first flow splitter plate is fixed perpendicularly to the left side wall of the inner cavity; the two first flow splitter plates are placed one above the other; the front ends of the two first flow splitter plates are adjacent to each other and form an acute angle, so that the coolant flowing from front to back will be split into upper and lower streams when passing through the first flow splitter assembly, and there is a gap between the two first flow splitter plates to further divide the flow direction of the coolant, forming upper, middle and lower three streams;

[0020] The second diversion assembly includes two second diversion plates; the plate surface of the second diversion plate is fixed perpendicularly to the left side wall of the inner cavity; the two second diversion plates are placed one above the other; the rear ends of the two second diversion plates are adjacent to each other and form an obtuse angle, so that the coolant flowing from the rear will be diverted and converged when passing through the second diversion assembly, and there is a gap between the two second diversion plates so that the converged coolant can continue to flow backward.

[0021] The first and second diversion components are alternately arranged. In this arrangement, if the first diversion component is located in front of the second diversion component, the rear end of the first diversion plate extends into the front gap between the two second diversion plates, allowing the upper, middle, and lower diversions formed by the first diversion component to enter the gap between the two second diversion plates and converge the coolant. If the first diversion component is located behind the second diversion component, the front end of the first diversion plate extends into the rear gap between the two second diversion plates, allowing the coolant that has converged again through the second diversion component to be diverted again by the two first diversion plates. Through the above structure, the coolant forms a meandering path, extending the actual flow distance of the coolant, thereby extending the flow time of the coolant, and thus allowing the coolant to have a longer time to contact the fins for heat dissipation.

[0022] When the coolant passes through the acute-angled structure of the first diversion component, it experiences a drastic change in direction, forming multiple local vortices. When the coolant passes through the obtuse-angled structure of the second diversion component, the diverted coolant undergoes secondary turbulence during the diversion process, and the multiple local vortices mix, creating turbulence. In this turbulent state, the coolant continuously collides and contacts the fins, reducing thermal resistance and improving the heat exchange efficiency between the coolant and the fins. Simultaneously, the turbulent flow allows for alternating contact between the coolant and the fins, reducing dead zones compared to a fixed-path flow, thus indirectly increasing the contact area and improving heat exchange efficiency per unit time. Furthermore, the turbulent flow facilitates the exchange of its own heat, resulting in a more uniform temperature after heat exchange, thereby reducing the load on equipment requiring coolant cooling.

[0023] In existing technology, the coolant flows smoothly along the extension direction of the seal during use. However, if the coolant's flow time in the water-cooling channel is short, it cannot fully contact the fins, thus reducing the heat exchange efficiency of the plate-fin heat exchanger. The plate-fin heat exchanger seal provided by this invention extends the coolant's flow time and creates turbulence in the flowing coolant by setting a first flow divider and a second flow divider, thereby improving the heat exchange efficiency of the plate-fin heat exchanger. Attached Figure Description

[0024] 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.

[0025] 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.

[0026] Figure 2 This is a right-side cross-sectional view of the sealing strip for the plate-fin heat exchanger provided in Embodiment 1 of this utility model. Detailed Implementation

[0027] 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.

[0028] Example 1:

[0029] like Figures 1-2 As shown, the sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model includes a sealing strip body 1; the sealing strip body 1 extends in the front-back direction; the sealing strip body 1 has an inner cavity 11; the right side of the sealing strip body 1 has an opening 12; the opening 12 communicates with the inner cavity 11.

[0030] It also includes several first shunt components 21 and several second shunt components 22;

[0031] The first diversion assembly 21 includes two first diversion plates 211; the surface of the first diversion plate 211 is perpendicular to the left side wall of the inner cavity 11; the two first diversion plates 211 are placed one above the other; the front ends of the two first diversion plates 211 are adjacent to each other and form an acute angle; there is a gap between the two first diversion plates 211.

[0032] The second diversion assembly 22 includes two second diversion plates 221; the plate surface of the second diversion plate 221 is perpendicular to the left side wall of the inner cavity 11; the two second diversion plates 221 are placed one above the other; the rear ends of the two second diversion plates 221 are adjacent to each other and form an obtuse angle; there is a gap between the two second diversion plates 221.

[0033] The first diversion component 21 and the second diversion component 22 are alternately arranged; if the first diversion component 21 is provided in front of the second diversion component 22, the rear end of the first diversion plate 211 extends into the front end gap between the two second diversion plates 221; if the first diversion component 21 is provided in rear of the second diversion component 22, the front end of the first diversion plate 211 extends into the rear end gap between the two second diversion plates 221.

[0034] When using the sealing strip for the plate-fin heat exchanger provided in Embodiment 1 of this utility model, the sealing strip body 1 is placed between two partitions, which are horizontally arranged. The upper partition is used as the upper partition, and the lower partition is used as the lower partition. The upper and lower surfaces of the sealing strip body 1 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 1 and the two partitions form a channel for the flow of coolant, namely the inner fin layer. Specifically, within the inner fin layer, the openings 12 of the two sealing strip bodies 1 are arranged opposite each other, and the front ends of the two sealing strip bodies 1 are adjacent to the water inlet head. The alternating arrangement of the inner fin layer and the outer fin layer forms a heat exchange. The heat exchanger core is stacked and then transferred to a brazing furnace for heating, so that the baffles, seals and fins are welded and fixed together. When the coolant enters the inner fin layer, the coolant is located between the two seal bodies 1, and the coolant enters or leaves the inner cavity 11 through the opening 12. When the coolant passes through the first diversion assembly 21, part of the coolant is diverted from the upper first diversion plate 211, part of the coolant is diverted from the lower first diversion plate 211, and another part of the coolant is diverted from the gap between the two first diversion plates 211. When the coolant passes through the second diversion assembly 22, the coolant gathers in the gap between the two second diversion plates 221.

[0035] The sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model includes a sealing strip body 1. To facilitate the explanation of the structure of the sealing strip body 1, the sealing strip body 1 extends in the front-back direction. In order to reduce the production cost of the sealing strip body 1, the sealing strip body 1 has an inner cavity 11, thereby reducing the raw material loss used to prepare the sealing strip body 1 and reducing the weight of the sealing strip body 1, thereby reducing the overall weight of the heat exchanger core and facilitating the assembly and transportation of the heat exchanger.

[0036] Furthermore, an opening 12 is provided on the right side of the sealing body 1; the opening 12 is connected to the inner cavity 11. When the coolant flows from the channel formed between the two sealing bodies 1, the coolant can enter the inner cavity 11 for buffering, reducing the load of the coolant on the inner fin layer and effectively improving the stability of the heat exchanger core.

[0037] Furthermore, since the coolant flows smoothly in the inner fin layer along the extension direction of the seal, the coolant has a short flow time in the inner fin layer, resulting in a short contact time with the fins and an inability to effectively dissipate heat to the outside through the fins. Therefore, it is necessary to extend the flow time of the coolant in the inner fin layer or increase the heat exchange efficiency per unit time to improve the cooling effect of the coolant. Specifically, it also includes a number of first flow distribution components 21 and a number of second flow distribution components 22.

[0038] The first diversion assembly 21 includes two first diversion plates 211; the plate surface of the first diversion plate 211 is fixed perpendicularly to the left side wall of the inner cavity 11; the two first diversion plates 211 are placed one above the other; the front ends of the two first diversion plates 211 are adjacent to each other and form an acute angle, so that when the coolant from front to back passes through the first diversion assembly 21, it is split into upper and lower streams, and there is a gap between the two first diversion plates 211, which further divides the flow direction of the coolant, forming upper, middle and lower three streams;

[0039] The second diversion assembly 22 includes two second diversion plates 221; the plate surface of the second diversion plate 221 is fixed perpendicularly to the left side wall of the inner cavity 11; the two second diversion plates 221 are placed one above the other; the rear ends of the two second diversion plates 221 are adjacent to each other and form an obtuse angle, so that the coolant flowing from the rear will be diverted and converged when passing through the second diversion assembly 22, and there is a gap between the two second diversion plates 221 so that the converged coolant can continue to flow backward;

[0040] The first diverter assembly 21 and the second diverter assembly 22 are alternately arranged. In this arrangement, if the first diverter assembly 21 is located in front of the second diverter assembly 22, the rear end of the first diverter plate 211 extends into the front gap between the two second diverter plates 221, so that the upper, middle and lower diverters formed by the first diverter assembly 21 can enter the gap between the two second diverter plates 221 and converge the coolant. If the first diverter assembly 21 is located behind the second diverter assembly 22, the front end of the first diverter plate 211 extends into the rear gap between the two second diverter plates 221, so that the coolant that has been re-converged by the second diverter assembly 22 can be diverted again by the two first diverter plates 211. Through the above structure, the coolant forms a winding path, which prolongs the actual flow distance of the coolant, thereby prolonging the flow time of the coolant, and thus allowing the coolant to have a longer time to contact the fins for heat dissipation.

[0041] When the coolant passes through the acute-angle structure of the first diversion component 21, it experiences a drastic change in direction, forming multiple local vortices. When the coolant passes through the obtuse-angle structure of the second diversion component 22, the diverted coolant experiences secondary disturbances during the diversion process, and the multiple local vortices mix, forming turbulence. In turbulent flow, the coolant continuously collides and contacts the fins, reducing heat transfer resistance and improving the heat exchange efficiency between the coolant and the fins. Simultaneously, in turbulent flow, the coolant alternately contacts the fins locally, and compared to the coolant flowing along a fixed path, this reduces dead angles in the contact area between the coolant and the fins, indirectly increasing the contact area and thus improving the heat exchange efficiency per unit time. Furthermore, in turbulent flow, the coolant easily exchanges its own heat, resulting in a more uniform temperature after heat exchange, thereby reducing the load on equipment requiring coolant cooling.

[0042] In existing technology, the coolant flows smoothly along the extension direction of the seal during use. If the coolant has a short flow time in the water-cooling channel, it cannot fully contact the fins, thereby reducing the heat exchange efficiency of the plate-fin heat exchanger. By using the plate-fin heat exchanger seal provided in Embodiment 1 of this utility model, the flow time of the coolant is extended by setting the first flow-diverting component 21 and the second flow-diverting component 22, and the flowing coolant is made to form turbulence, thereby improving the heat exchange efficiency of the plate-fin heat exchanger.

[0043] like Figure 1As shown, the sealing strip for the plate-fin heat exchanger provided in Embodiment 1 of this utility model preferably includes, in order to further enhance the turbulence effect, a few turbulence columns 3; the turbulence columns 3 are vertically arranged; the cross-section of the turbulence columns 3 is an equilateral triangle; the top of the turbulence columns 3 is fixed to the upper side wall of the inner cavity 11, and the bottom of the turbulence columns 3 is fixed to the lower side wall of the inner cavity 11; all the turbulence columns 3 are equidistantly distributed; all the turbulence columns 3 are arranged in the front-back direction; the turbulence columns 3 are placed near the opening 12, so that the coolant passes through the gap between the turbulence columns 3 when entering and exiting the inner cavity 11, and the coolant is divided by the edges of the turbulence columns 3, so that the coolant forms turbulence;

[0044] Meanwhile, the addition of the turbulence column 3 improves the overall structural strength of the seal body 1, thereby effectively enhancing the stability of the heat exchanger core.

[0045] 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 plurality of protrusions 111 on the left side wall of the inner cavity 11; the protrusions 111 are located between the first flow splitting component 21 and the second flow splitting component 22, and are used to enhance the turbulence effect.

[0046] In summary, the sealing strip for plate-fin heat exchangers provided by this utility model can solve the problem in the prior art where, during use, the coolant flows smoothly along the extension direction of the sealing strip, but if the coolant's flow time in the water-cooling channel is short, the coolant cannot fully contact the fins, thus reducing the heat exchange efficiency of the plate-fin heat exchanger; thereby improving the heat exchange efficiency of the plate-fin heat exchanger.

[0047] 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.

[0048] 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 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; It also includes several first-level splitting components and several second-level splitting components; The first diversion assembly includes two first diversion plates; the surface of the first diversion plate is perpendicular to the left side wall of the inner cavity; the two first diversion plates are placed one above the other; the front ends of the two first diversion plates are adjacent to each other and form an acute angle; there is a gap between the two first diversion plates. The second diversion assembly includes two second diversion plates; the surface of the second diversion plate is perpendicular to the left side wall of the inner cavity; the two second diversion plates are placed vertically; the rear ends of the two second diversion plates are adjacent to each other and form an obtuse angle. There is a gap between the two second splitter plates; The first diverter component and the second diverter component are alternately arranged; if the first diverter component is provided in front of the second diverter component, the rear end of the first diverter plate extends into the front end gap between the two second diverter plates; if the first diverter component is provided in rear of the second diverter component, the front end of the first diverter plate extends into the rear end gap between the two second diverter plates.

2. The sealing strip for a plate-fin heat exchanger as described in claim 1, characterized in that, It also includes a flow-disrupting column; the flow-disrupting column is vertically arranged; the cross-section of the flow-disrupting column is an equilateral triangle; the top of the flow-disrupting column is fixed to the upper side wall of the inner cavity, and the bottom of the flow-disrupting column is fixed to the lower side wall of the inner cavity; All the aforementioned turbulence-dispersing columns are equidistantly distributed; all the aforementioned turbulence-dispersing columns are arranged along the front-to-back direction.

3. The sealing strip for a plate-fin heat exchanger as described in claim 1, characterized in that, The left side wall of the inner cavity is provided with several protrusions; the protrusions are located between the first diversion component and the second diversion component.

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