Irregular heat exchanger core processing part and preparation method of irregular heat exchanger core

Abstract

The present invention belongs to the technical field of heat exchanger processes, and specifically relates to a processed part of a special-shaped heat exchanger core and a preparation method of the special-shaped heat exchanger core. In order to make full use of the limited irregular space, the present invention provides a processed part of an aluminum plate-fin heat exchanger core with a polygonal cross-section column and a core manufacturing method. This technical solution can manufacture an aluminum plate-fin heat exchanger core in the shape of a column with a polygonal cross-section. Such a core can increase the flow area and heat transfer area of the medium on side A within a given space, reduce the flow resistance of the heat exchange medium while increasing the heat transfer area, thereby improving the heat exchange efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchanger processes, and particularly relates to a processed part of a special-shaped heat exchanger core and a preparation method of the special-shaped heat exchanger core, and more particularly to the production of a heat exchanger core in the shape of a column with a polygonal cross-section, which is applied to the production of heat exchangers with complex shapes. Background Art

[0002] Plate-fin heat exchangers have the characteristics of compact structure and high heat transfer efficiency, and are now widely used in fields such as air separation, aerospace, and vehicle thermal management.

[0003] At present, the aluminum plate-fin heat exchanger cores on the market are regular cuboids, and the heat transfer performance of the aluminum plate-fin heat exchanger largely depends on the size of the heat exchanger core. With the integrated and modular development of heat exchange systems in various application fields, in the heat exchange system, the space allocated to the heat exchanger is becoming increasingly tight and the shape is becoming more and more irregular. Using a regular cuboid heat exchanger core, on the one hand, a relatively large space is required to meet the heat transfer resistance performance index, and on the other hand, in the limited irregular space, it is impossible to fully utilize the given space to arrange the heat exchanger core. Therefore, the regular cuboid heat exchanger core has gradually been unable to meet the heat exchange requirements of the increasingly compact heat exchange system. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] The technical problem to be solved by the present invention is: how to provide an aluminum plate-fin heat exchanger core.

[0006] (2) Technical Solutions

[0007] To solve the problems of the prior art, the present invention provides a processed part of a special-shaped heat exchanger core. One direction on the horizontal plane, i.e., the A direction, is defined as the flow direction of one heat exchange medium, and another direction perpendicular to the A direction on the horizontal plane, i.e., the B direction, is defined as the flow direction of another heat exchange medium; the rectangular surface perpendicular to the A direction is defined as the core A surface, and the rectangular surface of the core perpendicular to the B direction is defined as the core B surface;

[0008] The processed part of the special-shaped heat exchanger core includes: M layers of A-side flow channels, N layers of B-side flow channels, 2M partitions, and two side guards; among them, the flow directions of the A-side flow channels and the B-side flow channels are arranged orthogonally;

[0009] For the two lower layers of A-side flow channels in the M layers of A-side flow channels, it includes: full-size A-side fins and two A-side seals; the two A-side seals are placed at both ends of the full-size A-side fins in the B direction;

[0010] For the third to the Mth A-side channels in the M-layer A-side channels, it includes: an A-side center seal, two non-full-size A-side fins, and two A-side seals; among them, in the horizontal direction, the two non-full-size A-side fins are placed at both ends of the A-side center seal in the B direction, and on the outer sides of the two non-full-size A-side fins in the B direction, each is sealed by an A-side seal.

[0011] For each B-side channel in the N-layer B-side channels, it includes: one B-side fin and two B-side seals; among them, in the horizontal direction, the two B-side seals are placed at both ends of the B-side fin in the A direction.

[0012] The M-layer A-side channels and the N-layer B-side channels are arranged alternately in the vertical direction, that is, the first-layer A-side channel is at the bottommost layer, a first partition is provided below it, and the first-layer B-side channel is isolated and arranged above it through a second partition.

[0013] For the first-layer B-side channel, a second partition is provided below it, and the second-layer A-side channel is isolated and arranged above it through a third partition.

[0014] For the second-layer A-side channel, a third partition is provided below it, and the second-layer B-side channel is isolated and arranged above it through a fourth partition.

[0015] For the second-layer B-side channel, a fourth partition is provided below it, and the third-layer A-side channel is isolated and arranged above it through a fifth partition.

[0016] And so on, until the Nth-layer B-side channel, a 2M - 2th partition is provided below it, and the Mth-layer A-side channel is isolated and arranged above it through a 2M - 1th partition.

[0017] Finally, for the Mth-layer A-side channel, a 2Mth partition is provided above it.

[0018] Moreover, a side guard plate is provided at the lower end of the first partition and the upper end of the 2Mth partition.

[0019] Among them, in the special-shaped heat exchanger core processing part, for the third to the Mth A-side channels in the M-layer A-side channels, the M - 2 A-side center seals contained inside have the same size, and their positions relative to each other are set to be obliquely continuous, that is, the projections of two adjacent A-side center seals in the vertical direction have a certain overlapping area.

[0020] Among them, the partition brazes the side guard plates at the upper and lower ends to the channels.

[0021] Among them, the side guard plate is an aluminum plate with a certain thickness.

[0022] Among them, the partition is a thin aluminum plate with brazing flux on both sides.

[0023] Among them, the full-size A-side fins, non-full-size A-side fins, and B-side fins are parts formed by stamping aluminum foil, and their cross-sections are waveforms with periodic changes.

[0024] Among them, the A-side seal and the B-side seal are cylinders with rectangular or polygonal cross-sections.

[0025] Among them, N = M - 1.

[0026] Among them, M is 9 and N is 8.

[0027] In addition, the present invention also provides a method for preparing a special-shaped heat exchanger core from the special-shaped heat exchanger core workpiece described above. The method includes the following steps:

[0028] Step 1: Prepare the special-shaped heat exchanger core workpiece. The parts that need to be machined and formed include 2 side guards, 18 partitions, 18 A-side seals, 2 full-size A-side fins, 14 non-full-size A-side fins, 16 B-side seals, 8 B-side fins, and 7 A-side middle seals;

[0029] Step 2: Clean the machined and formed core parts to remove oil stains and dirt.

[0030] Step 3: After controlling the water of the cleaned core parts, dry them to remove surface water stains.

[0031] Step 4: Perform core assembly. Stack the parts layer by layer. The position of the A-side middle seal depends on the shape of the designed core. After assembly, press and fix.

[0032] Step 5: Place the press-fixed cuboid core into a vacuum brazing furnace for brazing. After taking it out of the furnace and cooling, correct the outer shape.

[0033] Step 6: Mark lines on the A-side middle seal according to the polygonal cross-section of the designed core, and cut the core along the marked line trajectory perpendicular to the A surface to form it.

[0034] (III) Beneficial effects

[0035] In order to make full use of the limited irregular space, the present invention provides a special-shaped heat exchanger core workpiece of a polygonal cross-section cylinder made of aluminum and a core manufacturing method. Through this workpiece, combined with further processing techniques, a special-shaped heat exchanger core of a polygonal cross-section cylinder made of aluminum can be manufactured. This kind of core can increase the flow area and heat transfer area of the A-side medium in a given space, increase the heat transfer area while reducing the flow resistance of the heat exchange medium, thereby improving the heat exchange efficiency.

[0036] Compared with the prior art, by using the technical solution of the present invention, a heat exchanger core body in the shape of a column with a polygon cross-section parallel to plane A can be manufactured, which can be used to manufacture heat exchangers with relatively complex shapes. On the one hand, it can meet the layout requirements of complex-shaped spaces. On the other hand, it can make full use of the corners of complex spaces, increase the proportion of the space occupied by the heat transfer elements of the core body, enhance the heat transfer and resistance performance of the heat exchanger, and thus improve the heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 FIG. is an exploded view of the structure of a traditional aluminum plate-fin heat exchanger core body;

[0038] Figure 2 FIG. is a process flow chart of a core body manufacturing method provided by the present invention;

[0039] Figure 3 FIG. is an isometric view of a rectangular parallelepiped core body after the brazing process is carried out according to the present invention;

[0040] Figure 4 FIG. is an oblique isometric view of a pentagonal core body after cutting and forming is carried out according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] To make the objectives, contents, and advantages of the present invention clearer, the following further describes in detail the specific embodiments of the present invention with reference to the drawings and embodiments.

[0042] The exploded view of the structure of a traditional aluminum plate-fin heat exchanger core body is as shown in Figure 1 FIG.. Taking one direction, i.e., direction A, as the flow direction of one heat transfer medium, and taking another direction perpendicular to direction A on the horizontal plane, i.e., direction B, as the flow direction of another heat transfer medium. The rectangular surface perpendicular to direction A is defined as the core body plane A, and the rectangular surface of the core body perpendicular to direction B is defined as the core body plane B. Its structure includes 2 layers of flow channels on the A side and 1 layer of flow channels on the B side. Fins are distributed in the flow channels (part number 004 in the figure is the fin on the A side, and part number 006 in the figure is the fin on the B side). The fins are parts formed by stamping aluminum foil, and the cross-section is a waveform with periodic changes. There are seals on both sides of the fins (part number 003 in the figure is the seal on the A side, and part number 005 in the figure is the seal on the B side). The seals are columns with a rectangular or polygonal cross-section. The flow directions of the flow channels on the A and B sides are orthogonally arranged, and the two flow channels are separated by a partition (part number in the figure is 002). The partition is an aluminum thin plate, and there is brazing flux on both sides, which is used to isolate the heat transfer media on both sides and play a role in welding the parts on both sides. The fins and seals are welded to the partition by the brazing process. There is a layer of partition outside each of the A-side channels at both ends. The partition brazes the side guards (part number in the figure is 001) at the upper and lower ends to the flow channels. The side guards are aluminum plates with a certain thickness and play a protective role. This structure cannot meet the heat transfer requirements of increasingly compact heat exchange systems.

[0043] To solve the above technical problems, the present invention provides a special-shaped heat exchanger core workpiece, as Figure 3 shown. Define a direction on the horizontal plane, i.e., the A direction, as the flow direction of one heat transfer medium, and another direction perpendicular to the A direction on the horizontal plane, i.e., the B direction, as the flow direction of another heat transfer medium; define the rectangular surface perpendicular to the A direction as the core A surface, and the core rectangular surface perpendicular to the B direction as the core B surface;

[0044] The special-shaped heat exchanger core workpiece includes: M layers of A-side flow channels, N layers of B-side flow channels, 2M partitions, and two side guards; wherein, the flow directions of the A-side flow channels and the B-side flow channels are arranged orthogonally;

[0045] For the two lower layers of A-side flow channels in the M layers of A-side flow channels, it includes: full-size A-side fins and two A-side seals; the two A-side seals are placed at both ends of the full-size A-side fins in the B direction;

[0046] For the third to the Mth layers of A-side flow channels in the M layers of A-side flow channels, it includes: A-side middle seals, two non-full-size A-side fins, and two A-side seals; wherein, in the horizontal direction, the two non-full-size A-side fins are placed at both ends of the A-side middle seals in the B direction, and on the outside of the two non-full-size A-side fins in the B direction, each is sealed by an A-side seal;

[0047] For each layer of B-side flow channels in the N layers of B-side flow channels, it includes: one B-side fin and two B-side seals; wherein, in the horizontal direction, the two B-side seals are placed at both ends of the B-side fin in the A direction;

[0048] The M layers of A-side flow channels and the N layers of B-side flow channels are arranged staggered in the vertical direction, that is, the first layer of A-side flow channels is at the bottom layer, the first partition is arranged below it, and the first layer of B-side flow channels is isolated and arranged above it through the second partition;

[0049] For the first layer of B-side flow channels, the second partition is arranged below it, and the second layer of A-side flow channels is isolated and arranged above it through the third partition;

[0050] For the second layer of A-side flow channels, the third partition is arranged below it, and the second layer of B-side flow channels is isolated and arranged above it through the fourth partition;

[0051] For the second layer of B-side flow channels, the fourth partition is arranged below it, and the third layer of A-side flow channels is isolated and arranged above it through the fifth partition;

[0052] And so on, until the Nth layer of B-side flow channels, the 2M - 2nd partition is arranged below it, and the Mth layer of A-side flow channels is isolated and arranged above it through the 2M - 1st partition;

[0053] Finally, the Mth layer of the A-side flow channel is provided with the 2Mth partition board;

[0054] Moreover, a side guard plate is provided at the lower end of the first partition board and the upper end of the 2Mth partition board.

[0055] Among them, in the shaped heat exchanger core workpiece, for the third to the Mth layer of the A-side flow channels in the M layers of the A-side flow channels, the M - 2 A-side middle seals included therein have the same size, and their positions are set obliquely continuous, that is, the projections of two adjacent A-side middle seals in the vertical direction have a certain overlapping area.

[0056] Thus, through the setting of the obliquely continuous positions of the A-side middle seals, a cutting route in the core manufacturing work is formed, that is, the cutting process is continuously cut along the continuous route of multiple A-side middle seals.

[0057] Among them, the partition board brazes the side guard plates at the upper and lower ends to the flow channel.

[0058] Among them, the side guard plate is an aluminum plate with a certain thickness.

[0059] Among them, the partition board is a thin aluminum plate with brazing flux on both sides.

[0060] Among them, the full-size A-side fins, non-full-size A-side fins, and B-side fins are parts formed by stamping aluminum foil, and the cross-section is a waveform with periodic changes.

[0061] Among them, the A-side seal and the B-side seal are cylinders with a rectangular or polygonal cross-section.

[0062] [[ID=Z8]]Among them, N = M - 1.

[0063] Among them, M is 9 and N is 8.

[0064] In addition, the present invention also provides a method for preparing a shaped heat exchanger core according to the shaped heat exchanger core workpiece, and the method includes the following steps:

[0065] Step 1: Prepare the shaped heat exchanger core workpiece. The parts that need to be machined and formed include 2 side guard plates, 18 partition boards, 18 A-side seals, 2 full-size A-side fins, 14 non-full-size A-side fins, 16 B-side seals, 8 B-side fins, and 7 A-side middle seals;

[0066] Step 2: Clean the machined and formed core parts to remove oil stains and dirt;

[0067] Step 3: After draining the water from the cleaned core parts, dry them to remove the surface water stains;

[0068] Step 4: Conduct core assembly. Stack the parts layer by layer. The position of the seal on the A side depends on the shape of the designed core. After assembly, press and fix it.

[0069] Step 5: Place the press-fixed cuboid core into a vacuum brazing furnace for brazing. After taking it out of the furnace and cooling, correct its outer shape.

[0070] Step 6: Mark lines on the seal on the A side according to the polygonal cross-section of the designed core, and cut the core along the marked trajectory perpendicular to the A plane. A fast wire cutting machine can be used for cutting.

[0071] According to Figure 2 The manufacturing process shown, the heat exchanger core is as shown in Figure 4 . This core is a pentagonal prism-shaped heat exchanger core with a pentagonal cross-section. This core helps to make full use of the heat exchange space in the design, increase the heat transfer area, and thus enhance the heat exchange effect.

[0072] Example 1

[0073] The basic process flow of the manufacturing method of the aluminum plate-fin heat exchanger core provided in this example is as shown in Figure 1 .

[0074] As shown in Figure 2 , first manufacture a cuboid heat exchanger core, the structure of which includes 9 A-side channels and 8 B-side channels. Fins are distributed in the channels, and there are seals on both sides of the fins. Among them, there is a middle seal between the upper 7 A-side channels. The two types of channels are separated by partitions, and there is a partition on each side outside the outermost A-side channel. The partitions brazed the side guards at both ends and the channels together.

[0075] According to Figure 1 The manufacturing process shown:

[0076] Step 1: The parts that need to be machined and formed are 2 side guards (1), 18 partitions (2), 18 A-side seals (3), 2 full-size A-side fins 00 (4), 16 B-side seals (5), 8 B-side fins (6), 1 A-side fin 11 (7), 1 A-side fin 12 (8), 1 A-side fin 13 (9), 1 A-side fin 14 (10), 1 A-side fin 15 (11), 1 A-side fin 16 (12), 1 A-side fin 17 (13), 7 A-side middle seals (14), 1 A-side fin 22 (15), 1 A-side fin 23 (16), 1 A-side fin 24 (17), 1 A-side fin 25 (18), 1 A-side fin 26 (19), 1 A-side fin 27 (2), a total of 20 types and 78 parts.

[0077] Among them, the 2 A-side fins 00 (4) are full-size A-side fins, and the rest of the A-side fins are non-full-size A-side fins.

[0078] Step 2: Clean the machined core parts to remove oil stains and dirt.

[0079] Step 3: After draining the water from the cleaned core parts, dry them to remove surface water stains.

[0080] Step 4: As shown in Figure 2 , assemble the core. Align the center of the middle seal with the hypotenuse of the cross-section of the designed core cylinder. After assembly, press and fix it.

[0081] Step 5: Place the press-fixed cuboid core into a vacuum brazing furnace for brazing. After taking it out of the furnace and cooling, correct its outer shape.

[0082] Step 6: Mark lines on the middle seal according to the polygon cross-section of the designed core, and cut the core along the marked trajectory perpendicular to plane A. A fast wire cutting machine can be used for cutting.

[0083] According to the Figure 1 shown production process, the heat exchanger core produced is as shown in Figure 3 . This core is a pentagonal prism-shaped heat exchanger core with a pentagonal cross-section. This core helps to make full use of the heat exchange space in the design, increase the heat transfer area, and thus enhance the heat exchange effect.

[0084] Those skilled in the art should understand that those skilled in the art can implement the above-mentioned variation examples (such as a core with a columnar shape of a polygon cross-section of other shapes, or even a core with a concave polygon cross-section) in combination with the prior art and the above examples, which will not be elaborated here.

[0085] Example 2

[0086] The manufacturing method provided in this example first follows the production process of traditional aluminum plate-fin heat exchanger cores, and then adds a cutting process, including the following steps:

[0087] Step 1: Machining;

[0088] Step 2: Cleaning;

[0089] Step 3: Drying;

[0090] Step 4: Assembly;

[0091] Step 5: Vacuum brazing;

[0092] Step 6: Cutting.

[0093] Furthermore, in the above Step 1, the machined parts include side guard plates, partition plates, A-side seals, A-side fins, A-side middle seals, B-side seals, and B-side fins. Among them, the lengths of the A-side fins are different, and their lengths and quantities are processed according to the required lengths and quantities of the polygon shape of the designed core cylinder.

[0094] Further, in the second step, the oil stains and dirt on the surfaces of the core parts are cleaned thoroughly.

[0095] Further, in the third step, before the parts enter the drying oven, the floating water on the surfaces of the parts can be blown off with a hair dryer, and a vibrating water control table is used to control the water on the fins.

[0096] Further, in the fourth step, the A-side middle seal is assembled according to the position dimensions corresponding to the polygon of the A side of the core. On both sides of each layer of the middle seal, the A-side fins or seals with corresponding lengths are assembled respectively. Other parts are assembled according to the cuboid-shaped core, and then they are pressed and fixed.

[0097] Further, in the fifth step, the brazed core has a cuboid shape, and shape correction is carried out after brazing.

[0098] Further, in the sixth step, first, on the A side of the core, a line is drawn on the middle seal according to the polygon shape of the designed core cross-section, and cutting is carried out perpendicular to the A side along the cutting track. The cutting track is in the middle of each layer of the middle seal, and a heat exchanger core in the shape of a polygonal cross-section cylinder is obtained.

[0099] Embodiment 3

[0100] This embodiment provides a manufacturing method for an aluminum plate-fin heat exchanger core. First, it follows the traditional manufacturing process of an aluminum plate-fin heat exchanger core, and then a cutting process is added, including the following steps:

[0101] Step 1, machining;

[0102] Step 2, cleaning;

[0103] Step 3, drying;

[0104] Step 4, assembly;

[0105] Step 5, vacuum brazing;

[0106] Step 6, cutting.

[0107] Among them, in the first step, the machined parts include side guard plates, partition plates, A-side seals, A-side fins, A-side middle seals, B-side seals, and B-side fins.

[0108] Among them, the A-side fins have different lengths, and their lengths and quantities are processed according to the required length dimensions and quantities of the polygon shape of the designed core column.

[0109] Among them, in the fourth step, the seals on the A side are assembled according to the position dimensions corresponding to the polygon of the core A side. On both sides of the seals in each layer, A-side fins or seals with corresponding lengths are assembled respectively. Other parts are assembled according to the cuboid-shaped core, so that the brazed core is still a cuboid. Such assembly can solve the problem of missed welding caused by insecure pressing in the vacuum brazing process.

[0110] Among them, in the sixth step, first draw a line on the middle seal on the A side of the core according to the designed polygon shape of the core cross-section, and cut perpendicular to the A side along the cutting track. The cutting track is in the middle of the middle seals in each layer to obtain a heat exchanger core in the shape of a polygonal cross-section cylinder.

[0111] Among them, the shape of the cut core is a cylinder with a polygonal cross-section. The polygonal cross-section is parallel to the A side, and its cutting inclined surface is sealed by the cut middle seal.

[0112] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A special-shaped heat exchanger core processing part, characterized in that, Define the flow direction of a heat exchange medium in a direction on the horizontal plane, i.e., direction A, and define the flow direction of another heat exchange medium in another direction perpendicular to direction A on the horizontal plane, i.e., direction B; define the rectangular surface perpendicular to direction A as the core A surface, and the rectangular core surface perpendicular to direction B as the core B surface; The special-shaped heat exchanger core workpiece includes: M layers of A-side flow channels, N layers of B-side flow channels, 2M partitions, and two side guards; among them, the flow directions of the A-side flow channels and the B-side flow channels are arranged orthogonally; For the two lower layers of A-side flow channels in the M layers of A-side flow channels, it includes: full-size A-side fins and two A-side seals; the two A-side seals are placed at both ends of the full-size A-side fins in the B direction; For the third to Mth layers of A-side flow channels in the M layers of A-side flow channels, it includes: A-side middle seals, two non-full-size A-side fins, and two A-side seals; among them, in the horizontal direction, the two non-full-size A-side fins are placed at both ends of the A-side middle seals in the B direction, and on the outside of the two non-full-size A-side fins in the B direction, each is sealed by an A-side seal; For each layer of B-side flow channels in the N layers of B-side flow channels, it includes: one B-side fin and two B-side seals; among them, in the horizontal direction, the two B-side seals are placed at both ends of the B-side fin in the A direction; The M layers of A-side flow channels and the N layers of B-side flow channels are arranged staggered in the vertical direction, that is, the first layer of A-side flow channels is at the bottom layer, the first partition is arranged below it, and the first layer of B-side flow channels is isolated and arranged above it through the second partition; For the first layer of B-side flow channels, the second partition is arranged below it, and the second layer of A-side flow channels is isolated and arranged above it through the third partition; For the second layer of A-side flow channels, the third partition is arranged below it, and the second layer of B-side flow channels is isolated and arranged above it through the fourth partition; For the second layer of B-side flow channels, the fourth partition is arranged below it, and the third layer of A-side flow channels is isolated and arranged above it through the fifth partition; And so on, until the Nth layer of B-side flow channels, the 2M - 2nd partition is arranged below it, and the Mth layer of A-side flow channels is isolated and arranged above it through the 2M - 1st partition; Finally, for the Mth layer of A-side flow channels, the 2Mth partition is arranged above it; Moreover, a side guard is arranged at the lower end of the first partition and the upper end of the 2Mth partition; Among them, in the special-shaped heat exchanger core workpiece, for the third to Mth layers of A-side flow channels in the M layers of A-side flow channels, the M - 2 A-side middle seals included therein have the same size, and their positions are set to be obliquely continuous, that is, the projections of two adjacent A-side middle seals in the vertical direction have a certain overlapping area; Through the setting of the obliquely continuous positions of the A-side middle seals, a cutting route is formed in the core manufacturing work; The side guard is an aluminum plate with a certain thickness; The full-size A-side fins, non-full-size A-side fins, and B-side fins are parts formed by stamping aluminum foil, and the cross-section is a waveform with periodic changes; 2. The special-shaped heat exchanger core body workpiece according to claim 1, wherein The A-side seals and B-side seals are columns with a rectangular or polygonal cross-section; 3. The shaped heat exchanger core processing part according to claim 1, characterized in that N = M - 1; 4. The processed part of the special-shaped heat exchanger core as described in claim 1, wherein, M is 9 and N is 8.

5. A method for preparing a special-shaped heat exchanger core body from the special-shaped heat exchanger core body processing part according to any one of claims 1 to 4, characterized in that, The method includes the following steps: Step 1: Prepare the processed parts of the special-shaped heat exchanger core. The machined parts required are 2 side guards, 18 partitions, 18 A-side seals, 2 full-size A-side fins, 14 non-full-size A-side fins, 16 B-side seals, 8 B-side fins, and 7 A-side middle seals; Step 2: Clean the machined core parts to remove oil stains and dirt; Step 3: After draining the water from the cleaned core parts, dry them to remove the water stains on the surface; Step 4: Assemble the core. Stack the parts layer by layer. The position of the A-side middle seal depends on the shape of the designed core. After assembly, press and fix; Step 5: Place the press-fixed cuboid core into a vacuum brazing furnace for brazing. After the furnace is removed and cooled, correct the outer shape; Step 6: Mark lines on the A-side middle seal according to the polygonal cross-section of the designed core, and cut the core along the marked line trajectory perpendicular to the A surface to form the shape.

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