Fin substrate and mold thereof, heat exchange component and dilution refrigerating machine

Abstract

The utility model discloses a fin substrate and a die thereof, a heat exchange component and a dilution refrigerator, and the fin substrate is characterized in that a first groove and a second groove which are used for placing a sintered sheet are correspondingly arranged on two opposite back surfaces of the fin substrate; the fin substrate further comprises substrate via holes penetrating through the first grooves and the second grooves, and the substrate via holes are used for fluid pipelines to penetrate through. The outer edges of the first groove and the second groove are fixed parts, the fixed parts on the two-phase back surfaces are respectively provided with a first flow channel and a second flow channel, and the first flow channel is communicated with the first groove, so that fluid outside the fin substrate is allowed to flow into the first groove; and the second flow channels are communicated with the second grooves, so that fluid outside the fin substrate is allowed to flow into the second grooves. Through the combined design of the grooves, the flow channels and the substrate via holes, a foundation can be provided for forming a heat exchange component.

Description

Technical Field

[0001] The utility model relates to the technical field applicable to preparation equipment, in particular to a fin base plate and a mold thereof, a heat exchange component and a dilution refrigerator. Background Art

[0002] Quantum computing is a completely new computing method that leverages principles of quantum mechanics, such as superposition and entanglement, to achieve computational power far exceeding that of classical computers. Currently, quantum computer research and development can be categorized into two main types: superconducting quantum computing and spin quantum computing based on semiconductor quantum dots. The core of these latter types of computing lies in quantum chips. Superconducting quantum computing requires an extremely low temperature environment close to absolute zero, while semiconductor quantum computing requires a magnetic field of 1.5K.

[0003] Dilution refrigerators can maintain temperatures in the mK range for long periods of time, have large cooling capacity, are not complex in structure and operation, and are not affected by magnetic fields. They are now an important refrigeration method for achieving temperatures in the mK range and can provide a good low-temperature environment for the stable operation of quantum chips.

[0004] The mixing chamber (MC) is the coldest end of the dilution refrigerator. Due to the Kapitza thermal resistance, the heat exchange area also needs to be increased. To increase the heat exchange area between the mixed liquid in the mixing chamber and the container wall, a sintered plate is installed on the heat exchange plate, which is then mechanically fixed to the mixing chamber floor. However, the technical challenges that need to be solved are how to prepare the heat exchange plate and how to form the powder into a sheet-like structure on the heat exchange plate. Utility Model Content

[0005] The purpose of the utility model is to provide a fin base plate and a mold thereof, a heat exchange component and a dilution refrigerator.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A fin substrate, wherein a first groove and a second groove for placing a sintered sheet are correspondingly provided on the back surfaces of two phases of the fin substrate; the fin substrate also includes a substrate through-hole penetrating the first groove and the second groove, and the substrate through-hole is used for allowing a fluid pipeline to pass through; the outer edges of the first groove and the second groove are fixed parts, and the fixed parts on the back surfaces of the two phases are respectively provided with a first flow channel and a second flow channel, the first flow channel is connected to the first groove, thereby allowing fluid outside the fin substrate to flow into the first groove; the second flow channel is connected to the second groove, thereby allowing fluid outside the fin substrate to flow into the second groove.

[0008] The present application also discloses a mold suitable for the above-mentioned fin substrate, comprising:

[0009] The outer mold assembly includes a first outer mold plate and a second outer mold plate for clamping the fin substrate from the back of the two phases, the first outer mold plate having a first through hole of the same size as the first groove, and the second outer mold plate having a second through hole of the same size as the second groove;

[0010] The tablet pressing assembly includes a first pressing block and a second pressing block, wherein the first pressing block is used to be embedded in the first through hole and the first groove to squeeze the powder in the first groove, and the second pressing block is used to be embedded in the second through hole and the second groove to squeeze the powder in the second groove.

[0011] The mold as described above, further, the outer mold assembly also includes a first screw unit for fixedly connecting the first outer mold plate, the fin base plate and the second outer mold plate.

[0012] As described above, the mold further comprises a first positioning groove provided on the surface of the first outer template facing the fin substrate, and a second positioning groove provided on the surface of the second outer template facing the fin substrate. Both the first positioning groove and the second positioning groove are used to limit the outer edge of the fin substrate.

[0013] As described above, the mold further comprises: the first pressing block being provided with a first core hole having the same size as the substrate via hole, the second pressing block being provided with a second core hole having the same size as the substrate via hole, and the mold further comprising a first core mold and a second core mold, the first core mold and the second core mold being used to prevent powder for forming a sintered sheet from entering the coaxially arranged first core hole, the substrate via hole, and the second core hole; the total length of the relative connection between the first core mold and the second core mold being less than the sum of the depths of the first core hole, the substrate via hole, and the second core hole and being greater than the sum of the depths of the substrate via hole and the first core hole or the second core hole.

[0014] The mold as described above, further, the first core mold and the second core mold are mortise and tenon structures.

[0015] The mold as described above further includes a clamping plate assembly, which includes a first clamping plate and a second clamping plate, which are used to cover both ends of the substrate through hole in the axial direction to apply a force to squeeze the first pressing block and the second pressing block.

[0016] The mold as described above further includes a first gasket and a second gasket correspondingly arranged in the first groove and the second groove, and the first gasket and the second gasket are used to squeeze the powder in the first groove and the second groove for preparing the sintered sheet.

[0017] The present application also discloses a heat exchange component, including the above-mentioned fin substrate, and also including a first sintered sheet correspondingly arranged in the first groove, the thickness of the first sintered sheet being less than the minimum distance from the bottom of the first groove to the first flow channel; a second sintered sheet correspondingly arranged in the second groove, the thickness of the second sintered sheet being less than the minimum distance from the bottom of the second groove to the second flow channel; the first sintered sheet and the second sintered sheet are sintered products of a sheet-like structure, and the sheet-like structure is pressed by the above-mentioned mold.

[0018] The present application also discloses a dilution refrigerator, comprising a mixing chamber, wherein a plurality of heat exchange components as described above are arranged in the mixing chamber, and the plurality of heat exchange components are arranged in an array.

[0019] The beneficial effects of the present invention are:

[0020] The fin substrate protected by this application comprises first and second grooves for providing space for sintered sheets. The first and second flow channels provide pathways for external liquid to flow into the first and second grooves. Furthermore, the substrate vias provide conduits for dilute-phase gas. This application, through the combined design of grooves, flow channels, and substrate vias, provides a foundation for forming heat exchange components.

[0021] The mold protected by this application enables the formation of a sheet-like structure forming a sintered sheet within the first and second grooves of the fin base plate. Because the powder is relatively large before being pressed into the sheet-like structure, the outer mold assembly and the corresponding grooves create a large space to accommodate the powder forming the sheet-like structure of a certain thickness.

[0022] Based on the mold protected by this application, the first screw unit fixes the first outer template, the fin base plate and the second outer template, so that the distance between the outer template outside the previously formed sheet structure and the fin base plate will not increase. Therefore, when the subsequent sheet structure is formed, the outer template and the pressing assembly used to form the previous sheet structure can still continue to wrap the previously formed sheet structure, thereby avoiding deformation of the previously formed sheet structure.

[0023] Based on the mold protected by this application, the provision of the first positioning groove and the second positioning groove can prevent relative displacement between the fin substrate and the first outer template and the second outer template, thereby avoiding deformation when pressure is applied to the powder material in the groove.

[0024] Based on the mold protected by this application, the core mold is divided into a first core mold and a second core mold, which can minimize the friction with the sheet structure during demolding, thereby avoiding deformation or damage of the sheet structure due to friction.

[0025] The mold protected by this application comprises a clamping plate assembly that covers both axial ends of the substrate via to apply force to squeeze the first and second pressing blocks. A second screw unit, fixed in an annular array on the clamping plate assembly, ensures that the first and second pressing blocks can compress the powder after loading. Furthermore, the rebound force of the first and second spring washers in the second screw unit can be used to compensate for the mold pressure loss caused by sintering shrinkage of the sintered sheet.

[0026] Based on the mold protected by this application, the arrangement of the first gasket and the second gasket can prevent the powder from adhering to the tableting assembly. In addition, the polytetrafluoroethylene material will expand when heated, so that continuous force can be applied to the powder when the powder is compressed.

[0027] The heat exchange component and the dilution refrigerator provided by the present invention have the same effects as the fin base plate, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 and Figure 2 A schematic structural diagram of a fin substrate provided in an embodiment of the present utility model;

[0029] Figure 3 A schematic structural diagram of a mold provided in an embodiment of the present utility model;

[0030] Figure 4 A front view of a mold provided in an embodiment of the present utility model;

[0031] Figure 5 for Figure 4 Cross-sectional view in the AA direction;

[0032] Figure 6 An exploded view of a mold provided by an embodiment of the present invention having a fin base plate installed therein;

[0033] Figure 7 and Figure 8 A three-dimensional view of the first outer template or the second outer template;

[0034] Figure 9 Schematic diagram of the structure of the heat exchange component.

[0035] In the accompanying drawings:

[0036] 1. Fin substrate; 101. First groove; 102. Second groove; 103. First flow channel; 104. Second flow channel; 105. Substrate through hole; 106. Fixing hole; 21. First gasket; 22. Second gasket; 31. First core mold; 32. Second core mold; 41. First outer mold; 411. First through hole; 42. Second outer mold; 421. Second through hole; 401. Template mounting hole; 402. First positioning groove; 403. Protrusion; 51. First pressing block; 511. First core hole; 52. Second pressing block; 521. Second core hole; 61. First clamp; 62. Second clamp; 71. First pressure head; 72. Second pressure head; 81. First screw unit; 82. Second screw unit; 91. First sheet structure; 92. Second sheet structure. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. The embodiments described below with reference to the drawings are exemplary and are only used to explain this application, and cannot be interpreted as limiting this application.

[0038] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In the dilution refrigerator, in order to better transfer the cooling capacity of the mixed liquid in the mixing chamber to the mixing chamber cold plate, for this purpose, Figure 1 and Figure 2 As shown, the present application discloses a fin substrate 1 used as a heat exchange plate, wherein the back surfaces of the two phases of the fin substrate 1 are respectively provided with a first groove 101 and a second groove 102 for placing sintered sheets;

[0041] The fin substrate 1 also includes a substrate through-hole 105 that penetrates the first groove 101 and the second groove 102. The substrate through-hole 105 is used for allowing a fluid pipeline to pass through. The outer edges of the first groove 101 and the second groove 102 are fixed portions. The fixed portions on the back surfaces of the two phases are respectively provided with a first flow channel 103 and a second flow channel 104. The first flow channel 103 is connected to the first groove 101, thereby allowing fluid outside the fin substrate 1 to flow into the first groove 101. The second flow channel 104 is connected to the second groove 102, thereby allowing fluid outside the fin substrate 1 to flow into the second groove 102. In this application, the first groove 101 and the second groove 102 are provided to increase the heat exchange effect of the sintered plate. The mixed liquid transfers the cold energy to the mixing chamber cold plate through the sintered plate.

[0042] In one embodiment, the first flow channel 103 and the second flow channel 104 are grooves formed in the fixed portion on the back surface of the two phases. This simplifies the process compared to providing through holes in the sidewalls of the fixed portion. It is important to note that the distance from the bottom of the groove to the bottom of the corresponding groove must be greater than the thickness of the sintered sheet within the corresponding groove, allowing the fluid to flow from the groove into the sintered sheet within the groove.

[0043] In one embodiment, the fixing portion is further provided with a fixing hole 106. During the process of forming the sheet structure and the sintered sheet on the fin substrate 1, the fixing hole 106 is used to fix the fin substrate 1 to the mold. After the sintered sheet is formed on the fin substrate 1, the fixing hole 106 is used to fix the fin substrate 1 with the sintered sheet to a cold plate or to fix multiple sintered sheets to a cold plate (not shown in the figure) at the same time.

[0044] In one embodiment, the fin substrate 1 is an annular structure, wherein the fixing holes 106 and the grooves are alternately arranged in an annular array on the fixing portion of the fin substrate 1 .

[0045] In order to be able to set sintered sheets in the first groove 101 and the second groove 102 of the fin substrate 1, it is necessary to first place powder materials in the first groove 101 and the second groove 102, and then press them into a sheet structure, and finally sinter the mold carrying the sheet structure together, wherein the sheet structure located in the first groove 101 is the first sheet structure 91, and the sheet structure located in the second groove 102 is the second sheet structure 92. After the first sheet structure 91 and the second sheet structure 92 are sintered and separated from the mold, a heat exchange component is formed. In order to form a sheet structure on the first groove 101 and the second groove 102 of the fin substrate 1, the present application discloses a mold, such as Figure 3-Figure 8As shown, an embodiment of the present application discloses a mold suitable for a fin substrate, comprising: an outer mold assembly and a tablet pressing assembly; the outer mold assembly comprises a first outer mold plate 41 and a second outer mold plate 42 for clamping the fin substrate 1 from the back of the two phases, the first outer mold plate 41 being provided with a first through hole 411 of the same size as the first groove 101, and the second outer mold plate 42 being provided with a second through hole 421 of the same size as the second groove 102; the tablet pressing assembly comprises a first pressing block 51 and a second pressing block 52, the first pressing block 51 being provided for inserting into the first through hole 411 and the first groove 101 to squeeze the powder in the first groove 101, and the second pressing block 52 being provided for inserting into the second through hole 421 and the second groove 102 to squeeze the powder in the second groove 102. In this embodiment, since the powder is relatively large in volume before being pressed into a sheet structure, the outer mold assembly and the corresponding groove form a relatively large space to accommodate the powder forming a sheet structure of a certain thickness.

[0046] In one embodiment, because powder is placed in the first and second grooves 101, 102, respectively, and pressed into a sheet structure, when the subsequent sheet structure is formed, the outer mold plate at the previously formed sheet structure may move downward under the action of gravity and separate from the previously formed sheet structure, which may cause damage to the previously formed sheet structure. To prevent this, the outer mold assembly further includes a first screw unit 81 for securely connecting the first outer mold plate 41, the fin base plate 1, and the second outer mold plate 42. After the previously formed sheet structure is formed, the mold is flipped so that the sheet pressing assembly forming the previously formed sheet structure is located below the previously formed sheet structure. The first screw unit 81 secures the first outer mold plate 41, the fin base plate 1, and the second outer mold plate 42 so that the distance between the outer mold plate outside the previously formed sheet structure and the fin base plate 1 does not increase. Therefore, the outer mold plate and the sheet pressing assembly forming the previously formed sheet structure can continue to wrap around the previously formed sheet structure, preventing deformation or damage to the previously formed sheet structure. For example, the first sheet structure 91 is a sheet structure formed first, and the second sheet structure 92 is a sheet structure formed later. When forming the first sheet structure 91, the first outer template 41 and the first pressing block 51 are located above the second outer template 42 and the second pressing block 52. In order to facilitate the pressing of the powder, the horizontal height of the first pressing block 51 is higher than the first outer template 41. After the first sheet structure 91 is formed, the mold is flipped so that the first outer template 41 and the first pressing block 51 are located below the second outer template 42 and the second pressing block 52. The first outer template 41 will move downward under the action of gravity and detach from the first sheet structure 91. The present application uses the first screw unit 81 to fix the first outer template 41, the fin base plate 1 and the second outer template 42, thereby preventing the first sheet structure from being deformed or damaged due to the detachment of the first outer template 41.

[0047] In one embodiment, a first positioning groove 402 is further provided on the surface of the first outer mold plate 41 facing the fin base plate 1, and a second positioning groove (not shown) is further provided on the surface of the second outer mold plate 42 facing the fin base plate 1. The first positioning groove 402 and the second positioning groove are both used to limit the outer edge of the fin base plate 1. The provision of the first positioning groove 402 and the second positioning groove can prevent relative displacement between the fin base plate 1 and the first outer mold plate 41 and the second outer mold plate 42, thereby avoiding deformation when pressure is applied to the powder material in the first groove 101 or the second groove 102.

[0048] In one embodiment, the first outer template 41 and the second outer template 42 have the same structure and are located on either side of the fin base plate 1 and are mirror images of the fin base plate 1. Taking the first outer template 41 as an example, a protrusion 403 is provided between the first through-hole 411 and the first positioning groove 402. The protrusion 403 matches the first flow channel 103 arranged in the annular array, so that the protrusion 403 can fill the corresponding first flow channel 103. Template mounting holes 401 are also provided between the protrusions 403 for fixed connection with the fin base plate 1 and the second outer template 42.

[0049] In one embodiment, the first pressing block 51 is correspondingly provided with a first core hole 511 of the same size as the substrate through hole 105, and the second pressing block 52 is correspondingly provided with a second core hole 521 of the same size as the substrate through hole 105. The mold also includes a first core mold 31 and a second core mold 32. The first core mold 31 and the second core mold 32 are used to prevent powder for forming a sintered sheet from entering the coaxially arranged first core hole 511, the substrate through hole 105 and the second core hole 521; the total length of the relative connection between the first core mold 31 and the second core mold 32 is less than the sum of the depths of the first core hole 511, the substrate through hole 105 and the second core hole 521 and is greater than the sum of the depths of the substrate through hole 105 and the first core hole 511 or the second core hole 521. In this embodiment, the first core mold 31 and the second core mold 32 are used to minimize the impact of the core mold on the sintered sheet when it is removed from the mold. Specifically, the core mold is set as the first core mold 31 and the second core mold 32. Compared with using only one core mold, the part of each core mold embedded in the sintered sheet is shorter. When the first core mold 31 and the second core mold 32 are pulled out from different sides during demolding, only a very short part will rub against the sintered sheet. When the first core mold 31 and the second core mold 32 are integrated, half of the length of the core mold will rub against the sintered sheet during demolding. Since the sum of the lengths of the first core mold 31 and the second core mold 32 is less than the sum of the depths of the first core hole, the substrate through hole 105, and the second core hole, it is ensured that the force-bearing surfaces of the first pressing block 51 and the second pressing block 52 are flat, avoiding that all the force acts on the core mold. The sum of the lengths of the first core mold 31 and the second core mold 32 is greater than the sum of the depths of the substrate through hole 105 and the first core hole or the second core hole. Since the first core mold 31 and the second core mold 32 are in a non-fixed state between the first core hole, the substrate through hole 105, and the second core hole, before applying pressure to the powder in one of the grooves, it is necessary to ensure that the core mold as a whole protrudes from the substrate through hole 105. More specifically, the core mold portion of the core mold protruding from the fin substrate 1 exceeds the height after the powder is placed, thereby ensuring that the powder is distributed around the core mold, and then the core mold passes through the through hole of the corresponding tabletting assembly and applies pressure so that the powder is pressed into a sheet structure.

[0050] In order to minimize the friction generated during demolding, the connection between the first core mold 31 and the second core mold 32 is located at the substrate through hole 105, avoiding the connection at the sintered sheet position in the first groove 101 and the second groove 102 to prevent powder from entering the connection.

[0051] In one embodiment, the first core mold 31 and the second core mold 32 are formed into a mortise and tenon structure. The outer wall of the mortise and tenon structure fits the inner wall of the first core hole 511, the second core hole 521, and the substrate through hole 105, and can prevent the powder between the first core hole 511 and the fin substrate 1 from entering the substrate through hole 105 before the sheet structure is formed. It can also prevent the sheet structure from expanding due to heat during the sintering process and extending toward the substrate through hole 105.

[0052] In one embodiment, the mold further includes a clamping plate assembly, comprising a first clamping plate 61 and a second clamping plate 62, which are used to cover both axial ends of the substrate via hole 105 to apply a force to compress the first and second clamping blocks 51 and 52. The first and second clamping plates 61 and 62 are also provided with a plurality of vias to better heat the mold and expose it to the hydrogen environment.

[0053] In one embodiment, the clamping plate assembly further includes a second screw unit 82 for connecting the first clamping plate 61 and the second clamping plate 62. The screw of the second screw unit 82 is sleeved with a first spring washer and a second spring washer. The first spring washer is attached to the upper end surface of the first clamping plate 61, and the second spring washer is attached to the lower end surface of the second clamping plate 62. In this embodiment, the provision of the first and second spring washers further ensures the compaction effect of the first and second pressing blocks 51 and 52 on the powder after loading. In addition, the rebound force of the first and second spring washers can also be used to compensate for the mold pressure loss caused by sintering shrinkage of the sintered sheet.

[0054] In one embodiment, the mold further includes a first gasket 21 and a second gasket 22 disposed in the first groove 101 and the second groove 102, respectively. The first gasket 21 and the second gasket 22 are used to compress the powder for preparing the sintered tablet within the first groove 101 and the second groove 102. The first gasket 21 and the second gasket 22 are made of polytetrafluoroethylene (PTFE) material, which can prevent the powder from adhering to the tablet pressing assembly. In addition, the polytetrafluoroethylene material expands when heated, thereby continuously applying force to the powder as it is compressed.

[0055] Based on the above mold, the process of forming the sheet structure on the fin substrate 1 is as follows:

[0056] S1. Use the first screw unit to connect the first outer template 41 and the second outer template 42, which are bonded to the back surfaces of the fin substrate 1, to the fin substrate 1, ensuring that the first through hole 411 of the first outer template 41 and the inner side wall of the first groove 101 in the depth direction are in the same plane, and the second through hole 421 of the second outer template 42 and the inner side wall of the second groove 102 in the depth direction are in the same plane;

[0057] S2. Place the second pressing block 52 into the second groove 102 and the second through hole 421 and place it on the second clamping plate 62 as a support member. The second clamping plate 62 is located on the second pressing head 72 below the clamping driver. Then, place the first core mold 31 and the second core mold 32 into the second through hole 421 and the substrate through hole 105.

[0058] S3. Place a certain amount of powder in the first groove 101 and the first through hole 411 and distribute it around the core mold. Then place the first compact 51 into the first groove 101, ensuring that the core mold passes through the first core hole 511 of the first compact 51. Place the first clamp 61 on the first compact 51.

[0059] S4, the first pressing head 71 and the second pressing head 72 above the clamping driving member apply pressure to the clamping plate assembly until the powder in the first groove 101 forms a first sheet structure 91 of a set thickness;

[0060] S5. Turn over all the components between the first clamping plate 61 and the second clamping plate 62 so that the first clamping plate 61 is at the bottom, remove the second clamping plate 62, and remove the second pressing block 52 from the second groove 102 and the second through hole 421;

[0061] S6. Place a certain amount of powder in the second groove 102 and the second through hole 421 and distribute it around the core mold. Then, replace the second compact 52 into the second groove 102 and ensure that the core mold passes through the second core hole 521 of the second compact 52.

[0062] S7. Place the second clamping plate 62 on the second pressing block 52, and then the first pressing head 71 and the second pressing head 72 apply pressure to the first clamping plate 61 and the second clamping plate 62 again to obtain the second sheet structure 92, and then set the second screw unit 82 in a circular array on the first clamping plate 61 and the second clamping plate 62, and ensure that the first sheet structure 91 and the second sheet structure 92 are continuously pressurized.

[0063] The above process is a process of forming a sheet structure using an outer mold assembly and a tablet pressing assembly. It should be noted that the above solution first forms the sheet structure in the first groove 101. Similarly, the sheet structure in the second groove 102 can be formed first. In the above steps, the force of the pressing head acts on the clamping plate. Compared with directly acting on the tablet pressing assembly, the acting surface is larger and the force is more uniform.

[0064] In one embodiment, before placing the first pressing block 51 into the first groove 101 in step S3 , the step further includes: placing a first gasket on the powder surface.

[0065] In step S6 , before the second pressing block 52 is re-placed into the second groove 102 , the process further includes: placing a second gasket on the powder surface.

[0066] In another embodiment, step S7 is:

[0067] A second clamping plate 62 is placed on the second pressing block 52, and a second screw unit 82 is set in a circular array on the first clamping plate 61 and the second clamping plate 62 to locate the relative positions of the first clamping plate 61 and the second clamping plate 62. Then, the first pressing head 71 and the second pressing head 72 are used to apply pressure to the first clamping plate 61 and the second clamping plate 62 again to obtain a second sheet structure 92. It is ensured that the first sheet structure 91 and the second sheet structure 92 are continuously pressurized, and then the second screw unit 82 is tightened to fix the first clamping plate 61 and the second clamping plate 62.

[0068] Based on the same utility model concept, such as Figure 9 As shown, the present application also discloses a heat exchange component, including the above-mentioned fin substrate 1, and also including a first sintered sheet 91 correspondingly arranged in the first groove, the thickness of the first sintered sheet 91 is less than the minimum distance from the bottom of the first groove to the first flow channel 103, wherein the minimum distance is the distance from the end face of the first flow channel 103 close to the bottom of the first groove to the bottom of the first groove; a second sintered sheet is correspondingly arranged in the second groove 102, the thickness of the second sintered sheet is less than the minimum distance from the bottom of the second groove 102 to the second flow channel 104, wherein the minimum distance is the distance from the end face of the second flow channel close to the bottom of the second groove to the bottom of the second groove; the first sintered sheet 91 and the second sintered sheet are pressed and sintered by the above-mentioned mold.

[0069] Based on the same application concept, the present application also proposes a dilution refrigerator, including a mixing chamber, wherein a plurality of the above-mentioned heat exchange components are arranged in an array, which makes heat exchange more convenient.

[0070] Throughout this specification, references to terms such as "some embodiments" or "examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with such embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments. Furthermore, those skilled in the art may combine and integrate the different embodiments or examples described in this specification.

[0071] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any way. Any person skilled in the art who, without departing from the scope of the present invention, makes any equivalent substitution, modification, or other variation to the technical solution and technical content disclosed herein shall be deemed to fall within the scope of the present invention and remain within the scope of protection of the present invention.

Claims

1. A fin substrate, characterized in that: A first groove and a second groove for placing sintered sheets are correspondingly provided on the back surfaces of the two phases of the fin substrate; the fin substrate also includes a substrate through-hole penetrating the first groove and the second groove, and the substrate through-hole is used for allowing a fluid pipeline to pass through; the outer edges of the first groove and the second groove are fixed parts, and the fixed parts on the back surfaces of the two phases are respectively provided with a first flow channel and a second flow channel, the first flow channel is connected to the first groove, thereby allowing the fluid outside the fin substrate to flow into the first groove; the second flow channel is connected to the second groove, thereby allowing the fluid outside the fin substrate to flow into the second groove.

2. A mold suitable for the fin substrate according to claim 1, characterized in that: include: The outer mold assembly includes a first outer mold plate and a second outer mold plate for clamping the fin substrate from the back of the two phases, the first outer mold plate having a first through hole of the same size as the first groove, and the second outer mold plate having a second through hole of the same size as the second groove; The tablet pressing assembly includes a first pressing block and a second pressing block, wherein the first pressing block is used to be embedded in the first through hole and the first groove to squeeze the powder in the first groove, and the second pressing block is used to be embedded in the second through hole and the second groove to squeeze the powder in the second groove.

3. The mold according to claim 2, wherein The outer mold assembly further includes a first screw unit for fixedly connecting the first outer mold plate, the fin base plate and the second outer mold plate.

4. The mold according to claim 2, wherein A first positioning groove is provided on the surface of the first outer template facing the fin substrate, and a second positioning groove is provided on the surface of the second outer template facing the fin substrate. Both the first positioning groove and the second positioning groove are used to limit the outer edge of the fin substrate.

5. The mold according to claim 2, wherein: The first pressing block is correspondingly provided with a first core hole of the same size as the substrate through hole, and the second pressing block is correspondingly provided with a second core hole of the same size as the substrate through hole. The mold also includes a first core mold and a second core mold. The first core mold and the second core mold are used to prevent the powder for forming the sintered sheet from entering the coaxially arranged first core hole, substrate through hole and second core hole; the total length of the relative connection between the first core mold and the second core mold is less than the sum of the depths of the first core hole, the substrate through hole and the second core hole and is greater than the sum of the depths of the substrate through hole and the first core hole or the second core hole.

6. The mold according to claim 5, wherein The first core mold and the second core mold are mortise and tenon structures.

7. The mold according to claim 2, wherein It also includes a clamping plate assembly, which includes a first clamping plate and a second clamping plate, which is used to cover both ends of the substrate through hole in the axial direction to apply a force to squeeze the first pressing block and the second pressing block.

8. The mold according to claim 2, wherein The invention also includes a first gasket and a second gasket respectively arranged in the first groove and the second groove, wherein the first gasket and the second gasket are respectively used to squeeze the powder in the first groove and the second groove for preparing the sintered sheet.

9. A heat exchange component, characterized in that: The fin substrate comprises the fin substrate according to claim 1, and further comprises a first sintered sheet correspondingly arranged in the first groove, the thickness of the first sintered sheet being less than the minimum distance from the bottom of the first groove to the first flow channel; a second sintered sheet is correspondingly arranged in the second groove, the thickness of the second sintered sheet being less than the minimum distance from the bottom of the second groove to the second flow channel; the first sintered sheet and the second sintered sheet are sintered products of a sheet-like structure, and the sheet-like structure is pressed by the mold according to any one of claims 2-8.

10. A dilution refrigerator, characterized in that It comprises a mixing chamber, in which a plurality of heat exchange components according to claim 9 are arranged, and the plurality of heat exchange components are arranged in an array.

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