Method for manufacturing heat exchange fin, heat exchange fin, and counterflow heat exchanger

Abstract

The application discloses a heat exchange sheet manufacturing method, a heat exchange sheet and a counterflow heat exchanger. The heat exchange sheet manufacturing method comprises a metal plate pretreatment process, a metal mesh manufacturing process, a compounding process, a cutting process and an injection molding process. The metal plate pretreatment process can form dense copper columns on the surface of the metal plate, thereby increasing the compounding contact area of the metal mesh and the moisture permeable film, increasing the bonding force between the metal mesh and the moisture permeable film, preventing the metal mesh and the moisture permeable film from being separated, and improving the reliability of the heat exchange sheet in application.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger equipment technology, and in particular to a method for manufacturing heat exchanger plates, heat exchanger plates, and a counter-flow heat exchanger. Background Technology

[0002] Counterflow heat exchangers typically use heat exchange fins for convective gas exchange. Currently, patent document CN116648592A, entitled "Separation Component for Total Heat Exchange Element, Total Heat Exchange Element and Ventilation Device," discloses a total heat exchange element formed by bonding a permeable membrane to a porous substrate. However, in practical applications, the porous substrate is often a metal mesh plate. The surface of the metal mesh plate is relatively smooth, resulting in weak adhesion between the permeable membrane and the metal mesh plate. Furthermore, during the use of a counterflow heat exchanger, the heat exchange fins are subjected to a certain air pressure, making it easy for the permeable membrane and the metal mesh plate to separate. This causes the metal mesh plate to lose its supporting effect and affects the normal performance of the heat exchanger. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a method for manufacturing heat exchanger plates.

[0004] The present invention also proposes a heat exchange plate.

[0005] The present invention also proposes a counter-flow heat exchanger.

[0006] The heat exchanger manufacturing method according to a first aspect of the present invention includes a metal plate pretreatment step, a metal mesh manufacturing step, a composite step, a cutting step, and an injection molding step.

[0007] The metal sheet pretreatment process includes the following steps:

[0008] Step 1.1: Prepare a metal plate, and bond the nuclear microporous membrane to the surface of the metal plate through an adhesive layer;

[0009] Step 1.2: Remove the adhesive layer at the corresponding position of the through hole of the nuclear microporous membrane by acid pickling process to expose the surface of the metal plate at the corresponding position of the through hole;

[0010] Step 1.3: Copper is deposited at the through-hole using an electroplating copper deposition process;

[0011] Step 1.4: Remove the nuclear microporous membrane and the adhesive layer; the deposited copper at the through-hole forms a copper pillar on the surface of the metal plate.

[0012] The metal mesh manufacturing process involves processing the metal plate obtained in the metal plate pretreatment process to form mesh holes, thereby obtaining a metal mesh.

[0013] In the composite process, a moisture-permeable membrane is laminated onto the surface of the metal mesh having the copper pillars to obtain a heat exchanger substrate;

[0014] The cutting process involves cutting the heat exchanger substrate into a predetermined shape to obtain the heat exchanger body.

[0015] In the injection molding process, a rubber strip is formed at the edge of the heat exchanger body.

[0016] The heat exchanger manufacturing method according to the embodiments of the present invention has at least the following beneficial effects: the metal plate pretreatment process can form dense copper pillars on the surface of the metal plate, thereby increasing the composite contact area between the metal mesh and the moisture-permeable membrane, increasing the bonding force between the metal mesh and the moisture-permeable membrane, making it less likely for the metal mesh and the moisture-permeable membrane to separate, and improving the reliability of the heat exchanger application.

[0017] According to some embodiments of the present invention, the injection mold of the injection molding process is provided with a concave-convex stamping structure on the inner side, and the concave-convex stamping structure can be pressed to form a concave-convex structure on the surface of the heat exchange plate body when the injection mold is closed.

[0018] According to some embodiments of the present invention, the metal plate is a copper plate.

[0019] According to some embodiments of the present invention, in the metal mesh manufacturing process, a groove is formed on the surface of the metal mesh by stamping equipment, and in the composite process, the moisture-permeable membrane is laminated to the bottom of the groove.

[0020] According to some embodiments of the present invention, the edge of the injection mold of the injection molding process is provided with a cutting structure, and the heat exchange plate substrate is cut to a set shape when the injection mold is closed.

[0021] According to some embodiments of the present invention, both surfaces of the metal plate undergo the metal plate pretreatment process.

[0022] According to some embodiments of the present invention, in step 1.4, the nuclear microporous membrane and the adhesive layer on the metal plate are removed by an alkaline washing process.

[0023] The heat exchanger according to a second aspect embodiment of the present invention is manufactured by the heat exchanger manufacturing method of any of the first aspects of the present invention described above.

[0024] The heat exchanger according to the embodiments of the present invention has at least the following beneficial effects: it enables the moisture-permeable membrane of the heat exchanger and the metal mesh to have high connection structural strength, and the manufacturing process is simple and efficient.

[0025] According to a third aspect of the present invention, a counter-flow heat exchanger includes heat exchange plates according to any of the first aspects of the present invention, wherein the rubber strips of adjacent heat exchange plates are connected by a snap-fit ​​structure.

[0026] The counter-flow heat exchanger according to embodiments of the present invention has at least the following beneficial effects: it simplifies the assembly of heat exchange plates, reduces the assembly difficulty of the counter-flow heat exchanger, and the snap-fit ​​structure can be directly formed by mold during the injection molding of rubber strips, reducing the production process and lowering the cost.

[0027] According to some embodiments of the present invention, the lower end face of the adhesive strip is provided with a downward convex structure, and the upper end face of the adhesive strip is provided with a groove corresponding to the downward convex structure. Attached Figure Description

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a schematic diagram of the metal plate pretreatment process according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the heat exchange plate according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the cross-sectional structure of the heat exchanger plate according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of a metal plate processing device according to an embodiment of the present invention.

[0033] Figure label:

[0034] Metal plate 110, copper pillar 111, adhesive layer 120, nuclear microporous membrane 130, through hole 131;

[0035] Metal mesh 200, groove 201;

[0036] Moisture permeable membrane 300;

[0037] Heat exchanger body 400, rubber strip 410, convex structure 411, slot 412;

[0038] Metal plate unwinding mechanism 910, microporous membrane unwinding mechanism 920, pressing roller group 930, pickling tank 940, first idle roller group 950, second idle roller group 960, alkaline washing tank 970, metal plate winding mechanism 980, electroplating tank 990. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0041] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0042] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0043] The following is for reference. Figures 1 to 4 A method for manufacturing heat exchanger plates according to an embodiment of the present invention is described.

[0044] like Figure 1 , Figure 2 As shown, the heat exchanger manufacturing method according to an embodiment of the present invention includes a metal plate pretreatment process, a metal mesh manufacturing process, a composite process, a cutting process, and an injection molding process.

[0045] The metal sheet pretreatment process includes the following steps:

[0046] Step 1.1: Prepare a metal plate 110, and attach the nuclear microporous membrane 130 to the surface of the metal plate 110 through an adhesive layer 120;

[0047] Step 1.2: Remove the adhesive layer 120 at the position corresponding to the through hole 131 of the nuclear microporous membrane 130 by acid washing process, so as to expose the surface of the metal plate 110 at the position corresponding to the through hole 131.

[0048] Step 1.3: Copper is deposited at the through-hole 131 by electroplating copper deposition process;

[0049] Step 1.4: Remove the nuclear microporous membrane 130 and the adhesive layer 120, and the deposited copper at the through hole 131 forms a copper pillar 111 on the surface of the metal plate 110;

[0050] In the metal mesh manufacturing process, the metal plate 110 obtained in the metal plate pretreatment process is processed to form mesh holes to obtain metal mesh 200;

[0051] In the composite process, the moisture-permeable membrane 300 is laminated to the surface of the metal mesh 200 having copper pillars 111 to obtain a heat exchange plate substrate;

[0052] The cutting process involves cutting the heat exchanger substrate into a predetermined shape to obtain the heat exchanger body 400.

[0053] In the injection molding process, a rubber strip 410 is formed on the edge of the heat exchanger body 400 through the injection molding process.

[0054] The metal plate pretreatment process can form dense copper pillars 111 on the surface of the metal plate 110, thereby increasing the composite contact area between the metal plate 110 (metal mesh 200) and the moisture-permeable membrane 300, increasing the bonding force between the metal plate 110 (metal mesh 200) and the moisture-permeable membrane 300, making it less likely for the metal plate 110 (metal mesh 200) and the moisture-permeable membrane 300 to separate, and improving the reliability of the heat exchanger application.

[0055] Specifically, the nuclear microporous membrane 130 is a high-precision microporous membrane material prepared based on nuclear track etching technology. The micropores formed by it are small in size and the density can be controlled as needed (by controlling the ion beam). The copper pillars 111 formed by the deposition of the through-holes 131 of the nuclear microporous membrane 130 are small in size (micro) and densely distributed, which can form a textured structure on the surface of the metal plate 110, so that it has a large bonding force with the moisture-permeable membrane 300.

[0056] In some embodiments of the present invention, the moisture-permeable membrane 300 is bonded to the surface of the metal mesh 200 having copper pillars 111 by an adhesive.

[0057] In some embodiments of the present invention, in step 1.4, the nuclear microporous membrane 130 and adhesive layer 120 on the metal plate 110 are removed by an alkaline washing process.

[0058] Of course, in the specific implementation process, the nuclear microporous membrane 130 can be corona treated to increase its bonding force with the adhesive layer 120. When the nuclear microporous membrane 130 is torn off, it can be torn off together with the adhesive layer 120.

[0059] like Figure 4As shown, in some embodiments of the present invention, the metal plate pretreatment process can be completed by a metal plate processing equipment, which includes a metal plate unwinding mechanism 910, a microporous membrane unwinding mechanism 920, a pressing roller group 930, an acid pickling tank 940, a first idle roller group 950, an electroplating tank 990, a second idle roller group 960, an alkaline washing tank 970, and a metal plate winding mechanism 980.

[0060] Specifically, such as Figure 4 As shown, the metal plate unwinding mechanism 910 and the microporous membrane unwinding mechanism 920 release the metal plate 110 and the microporous membrane 130 respectively. The metal plate 110 and the microporous membrane 130 are pressed and bonded at the pressing roller group 930 to complete step 1.1. Then, they enter the pickling tank 940 to perform step 1.2, removing the adhesive layer 120 at the corresponding position of the through hole 131 of the microporous membrane 130. Then, they enter the electroplating tank 990 through the first overhead roller group 950 to perform step 1.3, depositing copper at the through hole 131 through the electroplating copper deposition process. Then, they enter the alkaline washing tank 970 through the second overhead roller group 960 to perform step 1.4, removing the microporous membrane 130 and the adhesive layer 120. Finally, the metal plate winding mechanism 980 winds up the metal plate 110 with dense copper pillars formed on the surface for use in the metal mesh manufacturing process.

[0061] In the metal plate pretreatment process of this invention, by using a microporous membrane in conjunction with pickling, electroplating and alkaline washing processes, metal plate rolls with dense copper pillars can be continuously obtained. Compared with traditional rough surface treatments such as sanding, it is more efficient and can be continuously produced through a production line.

[0062] In some embodiments of the present invention, in step 1.2, the adhesive layer 120 at the corresponding position of the through hole is removed by an acidic solution such as hydrochloric acid or sulfuric acid.

[0063] Specifically, when acidic solutions such as hydrochloric acid or sulfuric acid are placed in the pickling tank 940, the adhesive layer 120 at the corresponding position of the through hole can be removed when the composite plate structure of metal plate 110 and nuclear microporous membrane 130 passes through the pickling tank 940.

[0064] In some embodiments of the present invention, in step 1.3, copper is deposited at the through-holes of the microporous membrane 130 by an electroplating copper process. The copper plating solution may be composed of copper sulfate, copper chloride, basic copper carbonate, copper tartrate, copper acetate, etc.

[0065] Specifically, copper plating solutions such as copper sulfate, copper chloride, basic copper carbonate, copper tartrate, and copper acetate are placed in the electroplating bath 990. When the composite plate structure of metal plate 110 and microporous membrane 130 passes through the electroplating bath 990, copper can be deposited at the through hole 131.

[0066] In some embodiments of the present invention, the nuclear microporous membrane 130 is a PET membrane, which is prone to hydrolysis in an alkaline solution of a set concentration. In step 1.4, the nuclear microporous membrane 130 and the adhesive layer 120 are etched with an alkaline solution such as sodium hydroxide or potassium hydroxide, which has a good cleaning effect.

[0067] Specifically, an alkaline solution such as sodium hydroxide or potassium hydroxide is placed in an alkaline washing tank 970. When the composite plate structure of metal plate 110 and nuclear microporous membrane 130 passes through the alkaline washing tank 970, the adhesive layer 120 and nuclear microporous membrane 130 can be removed.

[0068] In some embodiments of the present invention, the inner side of the injection mold of the injection molding process is provided with a concave-convex stamping structure. The concave-convex stamping structure can press and form a concave-convex structure on the surface of the heat exchanger body 400 when the injection mold is closed, so that the heat exchanger body 400 has a certain turbulence effect and can increase the heat exchange area (under the heat exchanger body 400 with a set area).

[0069] Specifically, a concave-convex structure can be formed on the surface of the heat exchanger body 400 by injection molding. The molding process is simple and does not require additional pressing process, thus improving production efficiency.

[0070] In some embodiments of the present invention, the edge of the injection mold in the injection molding process is provided with a cutting structure. When the injection mold is closed, the heat exchange plate substrate is cut to a set shape. That is, the cutting of the heat exchange plate substrate can be completed through the injection mold. The molding process is simple and does not require additional pressing process, thereby improving production efficiency.

[0071] In some embodiments of the present invention, the metal plate 110 is a copper plate, which gives it a high connection strength with the electroplated copper pillar 111, improves the structural strength of the composite of the moisture-permeable membrane 300 and the metal mesh 200, and at the same time, the copper plate has a good thermal conductivity, which can improve the heat exchange effect of the heat exchanger.

[0072] In some embodiments of the present invention, the metal mesh manufacturing process forms mesh holes on the metal plate 110 by a stamping process to obtain the metal mesh 200.

[0073] Specifically, the stamping process uses stamping equipment and a set stamping die to stamp mesh holes on a metal plate 110.

[0074] It is understood that, in some embodiments of the present invention, mesh holes can also be formed on the metal plate 110 by means of a rolling process in conjunction with a set roller cutter.

[0075] In some embodiments of the present invention, in the metal mesh manufacturing process, a groove 201 is formed on the surface of the metal mesh 200 by stamping equipment. In the composite process, a moisture-permeable membrane 300 is composited to the bottom of the groove 201 to further increase the structural strength of the composite of the moisture-permeable membrane 300 and the metal mesh 200.

[0076] Specifically, the cross-sectional profile of the groove 201 is larger than that of the copper column 111, forming a larger composite connection point to improve the strength of the composite structure.

[0077] In some embodiments of the present invention, the metal mesh manufacturing process involves forming a transverse cut on the metal plate 110 using a roller cutter, and then stretching the metal plate 110 along its length to deform the transverse cut into a diamond-shaped hole, thereby forming a metal mesh structure.

[0078] Specifically, the metal plate 110 is conveyed by a conveying roller. The metal plate 110 is set to be conveyed from back to front. The rotation speed of the conveying roller in front of the roller is greater than the rotation speed of the conveying roller behind the roller, thereby creating a stretching effect on the metal plate 110, so that the transverse cut is stretched into a diamond-shaped through hole, thus forming a metal mesh.

[0079] like Figure 3 As shown, in some embodiments of the present invention, after the metal plate 110 is unwound, it goes through a metal mesh manufacturing process to form a long plate-shaped metal mesh, and then sequentially undergoes a composite process, a cutting process, and an injection molding process online, which facilitates production and processing.

[0080] In some embodiments of the present invention, both surfaces of the metal plate 110 undergo a metal plate pretreatment process, that is, both sides of the metal plate 110 (metal mesh 200) are formed with dense copper pillars 111. One side of the metal mesh 200 is bonded and composited with the moisture-permeable membrane 300, which has good connection structure strength, while the other side can increase the heat exchange area of ​​the metal mesh 200 and improve the heat exchange effect of the heat exchanger.

[0081] In some embodiments of the present invention, in the composite process, a moisture-permeable membrane 300 is laminated to the surface of a metal mesh 200 having copper pillars 111 by means of a roll forming process and an adhesive, so as to obtain a heat exchange plate substrate.

[0082] In some embodiments of the present invention, the cutting process can also use a dedicated cutting die to cut the heat exchanger substrate into a set shape to obtain the heat exchanger body 400.

[0083] In some embodiments of the present invention, an adhesive strip 410 is formed on the edge of the heat exchanger body 400 by injection molding, which can fix the edge of the moisture permeable membrane 300 and the metal mesh 200 and increase the structural strength of the connection between the moisture permeable membrane 300 and the metal mesh 200.

[0084] According to the second aspect of the present invention, the heat exchanger is manufactured by the heat exchanger manufacturing method of any of the first aspects of the present invention, such that the moisture-permeable membrane 300 and the metal mesh 200 of the heat exchanger have high connection structural strength, and the manufacturing process is simple and efficient.

[0085] According to a third aspect of the present invention, a counter-flow heat exchanger includes heat exchange plates from any of the first aspects of the present invention described above. Adjacent heat exchange plates are connected by a snap-fit ​​structure, which simplifies the assembly of the heat exchange plates, reduces the assembly difficulty of the counter-flow heat exchanger, and the snap-fit ​​structure can be directly formed by mold during the injection molding of the heat exchange plates 410. The production process is simple, and compared with the traditional folded edge connection method, the process is simpler and the cost is lower.

[0086] like Figure 3 As shown, in some embodiments of the present invention, the lower end face of the adhesive strip 410 is provided with a downward protrusion structure 411, and the upper end face of the adhesive strip 410 is provided with a slot 412 corresponding to the downward protrusion structure 411. Through the cooperation of the downward protrusion structure 411 and the slot 412, the edge connection between adjacent heat exchange plates is realized, so as to facilitate the assembly of counter-flow heat exchangers.

[0087] Specifically, the convex structure 411 and the slot 412 extend along the length of the adhesive strip 410 to achieve better connection and sealing effect.

[0088] like Figure 3 As shown, in some embodiments of the present invention, the slot 412 has a dovetail groove structure that is smaller at the top and larger at the bottom, and the convex structure 411 is a trapezoidal structure that is smaller at the top and larger at the bottom, corresponding to the dovetail groove structure. This makes the convex structure 411 have good structural strength when it is engaged with the slot 412, and it is not easy for it to fall off.

[0089] Of course, in the specific implementation process, the slot 412 and the protruding structure 411 can also be other plug-in mating structures, such as the slot 412 and the protruding structure 411 can be arrow-shaped structures, which can also meet the requirements of plug-in mating.

[0090] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A method for manufacturing a heat exchanger plate, characterized in that, The process includes metal sheet pretreatment, metal mesh manufacturing, lamination, cutting, and injection molding. The metal sheet pretreatment process includes the following steps: Step 1.1: Prepare a metal plate (110), and attach a nuclear microporous membrane (130) to the surface of the metal plate (110) through an adhesive layer (120); Step 1.2: Remove the adhesive layer (120) at the position corresponding to the through hole (131) of the nuclear microporous membrane (130) by acid washing process to expose the surface of the metal plate (110) at the position corresponding to the through hole (131); Step 1.3: Copper is deposited at the through hole (131) by electroplating copper deposition process; Step 1.4: Remove the nuclear microporous membrane (130) and the adhesive layer (120), and the deposited copper at the through hole (131) forms a copper pillar (111) on the surface of the metal plate (110); In the metal mesh manufacturing process, the metal plate (110) obtained in the metal plate pretreatment process is processed to form mesh holes to obtain a metal mesh (200); In the composite process, a moisture-permeable membrane (300) is laminated onto the surface of the metal mesh (200) having the copper pillars (111) to obtain a heat exchange plate substrate; The cutting process involves cutting the heat exchanger substrate to a predetermined shape to obtain the heat exchanger body (400); In the injection molding process, a rubber strip (410) is formed at the edge of the heat exchanger body (400) through the injection molding process.

2. The method for manufacturing heat exchanger plates according to claim 1, characterized in that, The injection mold of the injection molding process is provided with a concave-convex stamping structure on the inner side. The concave-convex stamping structure can be pressed to form a concave-convex structure on the surface of the heat exchange plate body (400) when the injection mold is closed.

3. The method for manufacturing heat exchanger plates according to claim 1, characterized in that, The metal plate (110) is a copper plate.

4. The method for manufacturing heat exchanger plates according to claim 1, characterized in that, In the metal mesh manufacturing process, a groove (201) is formed on the surface of the metal mesh (200) by stamping equipment. In the composite process, the moisture-permeable membrane (300) is composited to the bottom of the groove (201).

5. The method for manufacturing heat exchanger plates according to claim 1, characterized in that, The injection mold of the injection molding process has a cutting structure on its edge, and the heat exchange plate substrate is cut to a set shape when the injection mold is closed.

6. The method for manufacturing heat exchanger plates according to claim 1, characterized in that, Both surfaces of the metal plate (110) undergo the metal plate pretreatment process.

7. The method for manufacturing heat exchanger plates according to claim 1, characterized in that, In step 1.4, the nuclear microporous membrane (130) and the adhesive layer (120) on the metal plate (110) are removed by an alkaline washing process.

8. A heat exchange plate, characterized in that, It is obtained by the heat exchanger manufacturing method as described in any one of claims 1 to 7.

9. A counter-flow heat exchanger, characterized in that, Including the heat exchange plate as described in claim 8, the adhesive strips (410) of adjacent heat exchange plates are connected by a snap-fit ​​structure.

10. The counter-flow heat exchanger according to claim 9, characterized in that, The lower end face of the adhesive strip (410) is provided with a downward protrusion structure (411), and the upper end face of the adhesive strip (410) is provided with a slot (412) corresponding to the downward protrusion structure (411).

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