Cold-edge fin-free plate-fin radiator core and processing method thereof

Abstract

The invention discloses a cold-edge fin-free plate-fin radiator core and a processing method thereof, and cold-edge fins in a traditional plate-fin radiator core are removed to form a cold-edge cavity for embedding a solid medium for cooling and heat storage. In the machining process, two kinds of supporting fins which are different in specification and have fin channels perpendicular to each other are placed between the cold edge sealing strips, graphite paper is laid on the upper surfaces and the lower surfaces of the supporting fins respectively, and finally vacuum brazing is conducted after appearance correction is conducted on the plate-fin type radiator core. And after brazing is completed and the temperature is recovered to the room temperature, the supporting fins are taken out, and the cold-edge fin-free plate-fin type radiator core is obtained. The cold-edge fin-free plate-fin type radiator core body processed by the method is free of deformation, and the size and the appearance of a cold-edge cavity are accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of plate-fin radiator forming and processing, and particularly relates to a cold-edge finless plate-fin radiator core and a processing method thereof. Background Art

[0002] The core structure of a plate-fin radiator is typically constructed with alternating hot-side and cold-side channels, with the cold-side channels typically containing a gas or liquid medium. To meet specialized cooling requirements, the cold-side channels may need to be embedded with a solid medium for cooling and heat storage, eliminating the traditional cold-side channel fins.

[0003] At present, there are two problems with aluminum alloy plate-fin radiators:

[0004] 1. Solid media cannot enter the cold edge;

[0005] 2. Heat storage cannot be achieved.

[0006] In summary, the existing traditional aluminum alloy plate-fin radiator core cannot meet some new requirements. Summary of the Invention

[0007] The present invention aims to provide a cold-edge finless plate-fin radiator core and a processing method thereof, so as to solve the problems that the existing traditional aluminum alloy plate-fin radiator core cannot meet the requirements of the cold edge and cannot pass solid medium and cannot achieve heat storage.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A cold-edge finless plate-fin radiator core, comprising:

[0010] Two parallel and spaced-apart side panels;

[0011] Hot side fins, a plurality of hot side fins are arranged in parallel and at intervals between the two side plates;

[0012] Hot edge sealing strips, two of which are respectively assembled at both ends of each hot edge fin;

[0013] A cold side cavity, wherein the space between any two adjacent hot side fins comprises a cold side cavity, and no fins are contained in the cold side cavity;

[0014] Cold edge seals, two of which are respectively assembled at the two ends of each cold edge cavity, and the cold edge seals and the hot edge seals are perpendicular to each other;

[0015] A brazing plate is placed between each hot side fin and the cold side cavity, and two end surfaces of the brazing plate are respectively connected to the hot side sealing strip and the cold side sealing strip.

[0016] As a solution, the hot edge fins are made of aluminum alloy, titanium alloy or high-temperature alloy.

[0017] The method for processing the core of the cold-edge finless plate-fin radiator as described above comprises the following steps:

[0018] S1, removing the oxide film on the surface of the side plate, hot edge fin, hot edge seal, cold edge seal and brazing plate and drying;

[0019] S2: Install two cold edge seals on both sides of the side panel in the length direction, ensuring that the cold edge seals are aligned with the edges of the side panel. Take a piece of graphite paper and lay it flat on the surface of the side panel between the two cold edge seals. The length of the graphite paper is greater than the distance between the two cold edge seals. The two edges of the graphite paper in the length direction are bent upward and contact the two cold edge seals respectively. The width of the graphite paper is greater than the width of the side panel, so that the two edges of the graphite paper in the width direction extend beyond the side panel by a certain length.

[0020] S3. Place a first stainless steel fin and two second stainless steel fins of the same specifications on the surface of the graphite paper, wherein the first stainless steel fin is located between the two second stainless steel fins, the fin channel of the first stainless steel fin is along the length direction of the side plate, and the fin channel of the second stainless steel fin is perpendicular to the length direction of the side plate (taking a triangular fin as an example, the cross-section of the fin channel is triangular and the fin channel is triangular prism-shaped. When placing the first stainless steel fin and the second stainless steel fin, ensure that the axes of their respective triangular prism fin channels are perpendicular to each other);

[0021] S4, take another sheet of graphite paper and cover the surface of the first stainless steel fin and the second stainless steel fin. The length of the graphite paper is greater than the distance between the two cold edge seals, and the two edges of the graphite paper in the longitudinal direction are bent downward and interposed between the cold edge seal and the first stainless steel fin and the second stainless steel fin. The width of the graphite paper is greater than the width of the side plate, so that the two edges of the graphite paper in the width direction extend beyond the side plate by a certain length.

[0022] S5, take a brazing plate, place its lower surface flat on the graphite paper and the cold edge seal surface in S4, and align the brazing plate with the edge of the cold edge seal and the side plate;

[0023] S6, placing a heat seal strip on each of the upper surfaces of the brazing plates in S5 and at both ends of the side plates in the width direction, with the heat seal strips aligned with the edges of the brazing plates;

[0024] S7, placing a hot edge fin between the two hot edge seals in S6, with the fin channel of the hot edge fin parallel to the fin channel of the first stainless steel fin;

[0025] S8, take another brazing plate and place its lower surface flat on the surface of the hot edge seal in S6 and the hot edge fin in S7, ensuring that the brazing plate is aligned with the edges of the hot edge seal and the hot edge fin;

[0026] S9, repeat the operation of placing two cold edge seals and graphite paper in S2 on the upper surface of the brazing plate in S8, and then repeat multiple rounds of S3 to S8 until the designed number of hot edge fins are assembled.

[0027] Furthermore, the processing method of the cold-edge finless plate-fin radiator core also includes S10, after the last round of S8, assembling another side plate on the surface of the brazing plate to complete the assembly of the plate-fin radiator core.

[0028] Furthermore, the processing method of the cold-edge finless plate-fin radiator core also includes S10, after the last round of S8, a cold-edge seal is installed on the surface of the brazing plate and at both ends of the corresponding side plate in the length direction, a piece of graphite paper is laid flat on the surface of the side plate between the two cold-edge seals, the length of the graphite paper is greater than the spacing between the two cold-edge seals, the two edges of the graphite paper in the length direction are bent upward and contact the two cold-edge seals respectively, the width of the graphite paper is greater than the width of the side plate, so that the two edges of the graphite paper in the width direction extend beyond the side plate by a certain length, a first stainless steel fin and two second stainless steel fins of the same specifications are placed on the surface of the graphite paper, wherein the first stainless steel fin The sheet is between the two second stainless steel fins, the fin channel of the first stainless steel fin is along the length direction of the side plate, and the fin channel of the second stainless steel fin is perpendicular to the length direction of the side plate. Take another piece of graphite paper and cover the surface of the first stainless steel fin and the second stainless steel fin. The length of the graphite paper is greater than the distance between the two cold edge seals, and the two edges of the graphite paper in the length direction are bent downward and interposed between the cold edge seal and the first stainless steel fin and the second stainless steel fin. The width of the graphite paper is greater than the width of the side plate, so that the two edges of the graphite paper in the width direction extend beyond the side plate by a certain length. Another side plate is assembled on the graphite paper and the surface of the cold edge seal to complete the assembly of the plate-fin radiator core.

[0029] Furthermore, the processing method of the cold-edge finless plate-fin radiator core also includes S11, installing the plate-fin radiator core assembled in S10 on a brazing fixture and performing shape correction, and then vacuum brazing the plate-fin radiator core together with the brazing fixture. After the vacuum brazing is completed, wait for it to cool to room temperature, remove all the first stainless steel fins, second stainless steel fins and graphite paper to obtain a cold-edge cavity.

[0030] As an option, in S3, the first stainless steel fin and the second stainless steel fin are both stamped from stainless steel strips, and the length of the first stainless steel fin is equal to the length of the second stainless steel fin, the width of the first stainless steel fin is greater than the width of the second stainless steel fin, and the fin channels of the first stainless steel fin and the second stainless steel fin have the same shape.

[0031] As an option, in S11 , pliers are used to clamp the first stainless steel fin and the second stainless steel fin and pull them out of the plate-fin radiator core, and steel wire is used to hook out the graphite paper or compressed air is used to blow them out of the plate-fin radiator core.

[0032] As an option, the first stainless steel fin, the second stainless steel fin and the hot edge fin are all fins with triangular cross-sections.

[0033] Compared with the prior art, the present invention has the following characteristics:

[0034] (1) The present invention adopts two different stainless steel fins to be assembled in the cold side cavity, wherein the fin channel direction of the first stainless steel fin is consistent with the fin channel direction of the hot side fin. On the one hand, it ensures that the cold side cavity has sufficient support during the brazing process. On the other hand, this placement direction can ensure that the first stainless steel fin can be taken out relatively easily after brazing. Firstly, because the rigidity of the first stainless steel fin in the fin channel direction is stronger than the rigidity perpendicular to the fin channel direction, the force along the fin channel direction will not cause the first stainless steel fin to deform and cause the first stainless steel fin to be stuck in the cold side cavity and unable to be taken out. Secondly, the fin channel is exposed to ensure that there is sufficient clamping and force application space; the fin channel direction of the second stainless steel fin is perpendicular to the fin channel direction of the first stainless steel fin, which can ensure that the hot side seal and the brazing plate of the hot side channel have sufficient support, and the fin support will not fail due to the pressure of the assembly weight and the shape correction, causing local deformation of the hot side seal after brazing and causing leakage risks, and ultimately ensuring the brazing qualification rate;

[0035] (2) When the graphite paper is assembled, both sides of its length are bent to ensure that when the plate-fin radiator core is adjusted, the graphite paper will not be embedded under the cold edge seal and cause it to not be welded;

[0036] (3) The processing method of the cold-side finless plate-fin radiator core proposed in the present invention can remove the cold-side fins to form a cold-side cavity while ensuring the brazing quality of the plate-fin radiator core, and the hot-side fins and hot-side seals will not be deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Assembly drawings for cold edge seals, side panels, and graphite paper;

[0038] Figure 2This is an assembly drawing of the first stainless steel fin and the second stainless steel fin;

[0039] Figure 3 This is the second graphite paper assembly drawing corresponding to the traditional cold edge channel in the plate-fin radiator core;

[0040] Figure 4 This is the assembly drawing of the brazing plate;

[0041] Figure 5 This is the assembly diagram of the hot edge fins and hot edge seals in the traditional hot edge channel in the plate-fin radiator core;

[0042] Figure 6 for Figure 5 Assembly drawing of the brazing plate installed above the hot edge fins and hot edge seals;

[0043] Figure 7 Schematic diagram of fin support failure in the cold edge cavity;

[0044] In the figure, 1-side plate, 2-hot edge fin, 3-hot edge seal, 4-cold edge seal, 5-brazing plate, 6-graphite paper, 7-first stainless steel fin, 8-second stainless steel fin. DETAILED DESCRIPTION

[0045] The present invention is further described below with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0046] Taking an aluminum alloy plate-fin radiator as an example, the core structure of an aluminum alloy plate-fin radiator is generally composed of alternating hot-side channels and cold-side channels, with the cold-side channels typically filled with a gas or liquid medium. When special cooling requirements are required, the cold-side channels need to be embedded with a solid medium for cooling and heat storage. Therefore, the cold-side fins in the traditional cold-side channels need to be removed, forming a cold-side cavity. This allows for the subsequent introduction of a solid medium into the cold-side cavity for heat storage.

[0047] To obtain a cold-edge, finless aluminum alloy plate-fin radiator core, the present invention first uses an aluminum alloy cleaning process to remove the surface oxide film of the aluminum plate-fin radiator parts and then heats them at 100°C for 30 minutes to dry. A stainless steel strip is punched into support fins (triangular fins) for the cold-edge channels of the plate-fin core, and the support fins are cut into two fins of equal length but different widths, namely, a first stainless steel fin 7 and a second stainless steel fin 8. The first stainless steel fin 7 is 100 mm long and 230 mm wide, while the second stainless steel fin 8 is 100 mm long and 20 mm wide. The first and second stainless steel fins 7 and 8 are cleaned and heatsed at 100°C for 30 minutes to dry. A graphite paper 6 with a thickness of 0.05 mm is cut into a rectangular shape with a width of 108 mm and a length of 275 mm. The number of graphite paper 6 is twice the number of first stainless steel fins 7, and the graphite paper 6 is inspected to ensure that it is not damaged.

[0048] Assemble the cold edge seals 4 along the length of the side panel 1, aligning them with the edges of the side panel 1. Spread the graphite paper 6 over the side panel 1, ensuring that the edges in contact with the cold edge seals 4 are curved upward, and the edges perpendicular to the cold edge seals 4 extend approximately 2.5 mm beyond the side panel 1. Assemble the first and second stainless steel fins 7, 8 between the cold edge seals 4, allowing no more than 2 mm of clearance between them, and no more than 3 mm of clearance between them and the cold edge seals 4 on either side. Cover the graphite paper 6 over the first and second stainless steel fins 7, 8. The edges of the graphite paper 6 parallel to the cold edge seals 4 should be curved downward, and the edges perpendicular to the cold edge seals 4 should extend approximately 2.5 mm beyond the side panel 1. Assemble the brazing plate 5 onto the core, aligning its edges with the cold edge seals 4 and the edges of the side panel 1. Assemble the hot edge seals 3 and hot edge fins 2 onto the core. Assemble the brazing plate 5 on the hot edge seal 3 and the hot edge fin 2 (triangular fin). Repeat the above steps until the assembly of the aluminum alloy plate-fin radiator core is completed. Assemble the assembled aluminum alloy plate-fin radiator core on the brazing fixture, perform shape correction, tighten the brazing fixture, and ensure that the inside of the aluminum alloy plate-fin radiator core is compressed. Vacuum braze the assembled aluminum alloy plate-fin radiator core. After the aluminum alloy plate-fin radiator core is brazed and cooled to room temperature, use pliers to remove the first stainless steel fin 7 and the second stainless steel fin 8 in the aluminum alloy plate-fin radiator core, use steel wire to hook out the graphite paper 5 or blow compressed air out of the plate-fin radiator core.

[0049] The difficulty in processing the cold-edge finless plate-fin radiator core is first reflected in the structural design. How can the supporting material of the cold-edge channel be removed without affecting the structure of the final plate-fin radiator core? In addition, the supporting material cannot affect the plate-fin radiator core during the brazing process. Secondly, when assembling the plate-fin radiator core, the materials and structures involved in the assembly cannot be left in the final brazed product. For example, the graphite paper 5, the first stainless steel fin 7, and the second stainless steel fin 8 involved in the assembly of the present invention must be prevented from being sandwiched between the cold-edge seal 4 and the brazing plate 5 during the assembly and calibration process.

[0050] Figure 7 The reason why the first stainless steel fin 7 and the second stainless steel fin 8 are placed in different directions in this application is shown in FIG. Figure 7 If only the first stainless steel fin 7 is used, the direction of its fin channel is consistent with the length direction of the hot edge seal 3 corresponding to the upper and lower hot edge channels. Under the weight of the core body and the assembly correction pressure, the first stainless steel fin 7 will be deformed. Figure 7 The state in the middle left image changes to the state in the right image, causing the hot edge seal 3 above it to collapse and deform due to lack of support, resulting in leakage after brazing. However, the use of a second stainless steel fin 8, with the fin channel direction perpendicular to the hot edge seal 3, ensures that the hot edge seal 3 is supported regardless of any deformation. The worst case scenario is slight deformation at both ends of the hot edge seal 3 along its length, which can be remedied.

[0051] A method for processing a cold-edge finless plate-fin radiator core comprises the following steps:

[0052] S1: Use an aluminum alloy cleaning process to remove the oxide film on the surface of each component of the aluminum plate-fin radiator (side plate 1, hot edge fin 2, hot edge seal 3, cold edge seal 4 and brazing plate 5) and dry them at a temperature of 100°C for 30 minutes;

[0053] S2: Punch a 0.1mm thick stainless steel strip into a triangular cross-section support fin for the cold side channel of the aluminum alloy plate-fin radiator core. Cut the support fin into two sizes of fins: a first stainless steel fin 7 and a second stainless steel fin 8. The first stainless steel fin 7 is 100mm long and 230mm wide, while the second stainless steel fin 8 is 100mm long. Clean the surfaces of the first and second stainless steel fins 7 and 8 and dry them at 100°C for 30 minutes.

[0054] S3: Cut the graphite paper 6 with a thickness of 0.05 mm into a rectangular shape with a width of 108 mm and a length of 275 mm. The number of graphite papers 6 is twice the number of the first stainless steel fins 7. Check that the graphite paper 6 is not damaged.

[0055] S4: Install the cold edge seal 4 on both sides of the side panel 1 in the longitudinal direction and align with the edge of the side panel 1. Spread the graphite paper 6 on the side panel 1, ensuring that the edge in contact with the cold edge seal 4 is bent upward, and the edge perpendicular to the cold edge seal 4 extends about 2.5mm from the side panel 1. Figure 1 As shown;

[0056] S5: Place the first stainless steel fin 7 and the second stainless steel fin 8 as shown in FIG. Figure 2 As shown, the first stainless steel fin 7 and the second stainless steel fin 8 are assembled between the cold edge seals 4, and a spacing of no more than 2 mm is allowed between the first stainless steel fin 7 and the second stainless steel fin 8, and a spacing of no more than 3 mm is allowed between the first stainless steel fin 7 and the second stainless steel fin 8 and the cold edge seals 4 on both sides;

[0057] S6: Cover the first stainless steel fin 7 and the second stainless steel fin 8 with graphite paper 6. The edge of the graphite paper 6 parallel to the cold edge seal 4 should be bent downward, and the edge perpendicular to the cold edge seal 4 should extend about 2.5mm beyond the side plate 1. Figure 3 As shown;

[0058] S7: As Figure 4 As shown, the brazing plate 5 (black bold straight line) is assembled on the aluminum alloy plate-fin radiator core, and the edge of the brazing plate 5 is aligned with the edge of the cold edge seal 4 and the side plate 1;

[0059] S8: Figure 5 As shown, two hot edge sealing strips 3 and a hot edge fin 2 are assembled on the brazing plate 5. The fin channel of the hot edge fin 2 is parallel to the fin channel direction of the first stainless steel fin 7 and perpendicular to the fin channel direction of the second stainless steel fin 8.

[0060] S9: As Figure 6 As shown, another brazing plate 5 (black bold straight line) is assembled on the hot edge seal 3 and the hot edge fin 2;

[0061] S10: Repeat S4 (replacing the side plate 1 in S4 with the brazing plate 5) to S9 until the assembly of the aluminum alloy plate-fin radiator core is completed;

[0062] S11: Install the assembled aluminum alloy plate-fin radiator core on the brazing fixture, perform shape correction, and tighten the brazing fixture to ensure that the aluminum alloy plate-fin radiator core is tightly compressed;

[0063] S12: vacuum brazing the assembled aluminum alloy plate-fin radiator core;

[0064] S13: After the aluminum alloy plate-fin radiator core is brazed and cooled to room temperature, a clamp is used to remove the first stainless steel fin 7 and the second stainless steel fin 8 from the aluminum alloy plate-fin radiator core, and a thin steel wire is used as a hook to remove all the graphite paper 5 from the aluminum alloy plate-fin radiator core.

[0065] Those skilled in the art will be able to make various adjustments to this application based on actual circumstances. The general principles defined in this application may be implemented in other implementations without departing from the scope of the disclosure. Therefore, this application is not limited to the specific embodiments shown, but is intended to conform to the broadest scope consistent with the principles and features set forth in the claims of this application.

Claims

1. A cold edge finless plate-fin radiator core, characterized in that: include: Two parallel and spaced-apart side panels (1); Hot side fins (2), wherein a plurality of hot side fins (2) are arranged in parallel and at intervals between the two side plates (1); Hot edge sealing strips (3), two of the hot edge sealing strips (3) are respectively assembled at both ends of each hot edge fin (2); A cold side cavity, wherein the space between any two adjacent hot side fins (2) comprises a cold side cavity, and no fins are present in the cold side cavity; Cold edge sealing strips (4), wherein two cold edge sealing strips (4) are respectively assembled at both ends of each cold edge cavity, and the cold edge sealing strips (4) and the hot edge sealing strips (3) are perpendicular to each other; A brazing plate (5) is placed between each hot side fin (2) and the cold side cavity, and two end surfaces of the brazing plate (5) are respectively connected to the hot side sealing strip (3) and the cold side sealing strip (4).

2. The cold-edge finless plate-fin radiator core according to claim 1, characterized in that: The hot edge fins (2) are made of aluminum alloy, titanium alloy or high-temperature alloy.

3. A method for processing a cold-edge finless plate-fin radiator core according to claim 1 or 2, characterized in that: The following steps are involved: S1, removing the oxide film on the surface of the side plate (1), the hot edge fin (2), the hot edge seal (3), the cold edge seal (4) and the brazing plate (5) and drying them; S2, assemble the two cold edge seals (4) on both sides of the side panel (1) in the length direction, ensure that the cold edge seals (4) are aligned with the edges of the side panel (1), take a piece of graphite paper (6) and lay it flat on the surface of the side panel (1) between the two cold edge seals (4), the length of the graphite paper (6) is greater than the distance between the two cold edge seals (4), the two edges of the graphite paper (6) in the length direction are bent upward and contact the two cold edge seals (4), the width of the graphite paper (6) is greater than the width of the side panel (1), so that the two edges of the graphite paper (6) in the width direction respectively extend beyond the side panel (1) by a certain length; S3, placing a first stainless steel fin (7) and two second stainless steel fins (8) of the same specifications on the surface of the graphite paper (6), wherein the first stainless steel fin (7) is between the two second stainless steel fins (8), the fin channel of the first stainless steel fin (7) is along the length direction of the side plate (1), and the fin channel of the second stainless steel fin (8) is perpendicular to the length direction of the side plate (1); S4, take another piece of graphite paper (6) and cover the surface of the first stainless steel fin (7) and the second stainless steel fin (8), the length of the graphite paper (6) is greater than the distance between the two cold edge seals (4), and the two edges of the graphite paper (6) in the length direction are bent downward and are between the cold edge seal (4) and the first stainless steel fin (7) and the second stainless steel fin (8), and the width of the graphite paper (6) is greater than the width of the side plate (1), so that the two edges of the graphite paper (6) in the width direction respectively exceed the side plate (1) by a certain length; S5, take a brazing plate (5), place its lower surface flat on the graphite paper (6) and the surface of the cold edge seal (4) in S4, and align the brazing plate (5) with the edge of the cold edge seal (4) and the side plate (1); S6, placing a hot edge seal (3) on the upper surface of the brazing plate (5) in S5 and at both ends of the corresponding side plate (1) in the width direction, and the hot edge seal (3) is aligned with the edge of the brazing plate (5); S7, placing a hot edge fin (2) between the two hot edge seals (3) in S6, with the fin channel of the hot edge fin (2) being parallel to the fin channel of the first stainless steel fin (7); S8, take another brazing plate (5), and place its lower surface flat on the surface of the hot edge seal (3) in S6 and the hot edge fin (2) in S7, ensuring that the brazing plate (5) is aligned with the edges of the hot edge seal (3) and the hot edge fin (2); S9, repeat the operation of placing two cold edge seals (4) and graphite paper (6) in S2 on the upper surface of the brazing plate (5) in S8, and then repeat multiple rounds of S3 to S8 until the assembly of the designed number of hot edge fins (2) is completed.

4. The method for processing a cold-edge finless plate-fin radiator core according to claim 3, characterized in that: The method further includes S10, after the last round of S8, assembling another side plate (1) on the surface of the brazing plate (5) to complete the assembly of the plate-fin radiator core.

5. The method for processing a cold-edge finless plate-fin radiator core according to claim 3, characterized in that: It also includes S10, after the last round of S8, a cold edge seal (4) is installed on the surface of the brazing plate (5) and at both ends of the corresponding side plate (1) in the length direction, a piece of graphite paper (6) is laid flat on the surface of the side plate (1) between the two cold edge seals (4), the length of the graphite paper (6) is greater than the spacing between the two cold edge seals (4), the two edges of the graphite paper (6) in the length direction are bent upward and contact the two cold edge seals (4) respectively, the width of the graphite paper (6) is greater than the width of the side plate (1), so that the two edges of the graphite paper (6) in the width direction respectively exceed the side plate (1) by a certain length, and a first stainless steel fin (7) and two second stainless steel fins (8) of the same specification are placed on the surface of the graphite paper (6), wherein the first stainless steel fin (7) is between the two second stainless steel fins (8) The fin channel of the first stainless steel fin (7) is along the length direction of the side plate (1), and the fin channel of the second stainless steel fin (8) is perpendicular to the length direction of the side plate (1). Another piece of graphite paper (6) is taken to cover the surface of the first stainless steel fin (7) and the second stainless steel fin (8). The length of the graphite paper (6) is greater than the distance between the two cold edge seals (4), and the two edges of the graphite paper (6) in the length direction are bent downward and are between the cold edge seal (4) and the first stainless steel fin (7) and the second stainless steel fin (8). The width of the graphite paper (6) is greater than the width of the side plate (1), so that the two edges of the graphite paper (6) in the width direction respectively exceed the side plate (1) by a certain length. Another side plate (1) is assembled on the graphite paper (6) and the surface of the cold edge seal (4) to complete the assembly of the plate-fin radiator core.

6. A method for processing a cold-edge finless plate-fin radiator core according to claim 4 or 5, characterized in that: The method further includes S11, installing the plate-fin radiator core assembled in S10 onto a brazing fixture, correcting its shape, and then vacuum brazing the plate-fin radiator core together with the brazing fixture. After the vacuum brazing is completed, the plate-fin radiator core is cooled to room temperature, and all the first stainless steel fins (7), the second stainless steel fins (8) and the graphite paper (5) are removed to obtain a cold edge cavity.

7. The method for processing a cold-edge finless plate-fin radiator core according to claim 3, characterized in that: In the S3, the first stainless steel fin (7) and the second stainless steel fin (8) are both stamped from stainless steel strips, the length of the first stainless steel fin (7) is equal to the length of the second stainless steel fin (8), the width of the first stainless steel fin (7) is greater than the width of the second stainless steel fin (8), and the fin channels of the first stainless steel fin (7) and the second stainless steel fin (8) have the same shape.

8. The method for processing a cold-edge finless plate-fin radiator core according to claim 6, characterized in that: In the S11, pliers are used to clamp the first stainless steel fin (7) and the second stainless steel fin (8) and pull them out of the plate-fin radiator core, and steel wire is used to hook out the graphite paper (5) or compressed air is blown out of the plate-fin radiator core.

9. The method for processing a cold-edge finless plate-fin radiator core according to claim 3, characterized in that: The first stainless steel fin (7), the second stainless steel fin (8) and the hot edge fin (2) are all fins with triangular cross-sections.

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