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

Abstract

The utility model belongs to the technical field of refrigeration, and particularly relates to a fin base plate and a tabletting die thereof, a heat exchange component, a mixing chamber and a dilution refrigerator, the fin base plate is used as a heat exchange plate and comprises a base plate part and a fixing part, and the base plate part and the fixing part are integrally formed; the first surface of the fixing part is flush with the first plate surface of the base plate part, and the second surface of the fixing part is parallel to and higher than the second plate surface of the base plate part; the second plate surface deviates from the first plate surface, and the second surface deviates from the first surface; a fixing hole penetrating through the first surface and the second surface is formed in the fixing part, and the first plate surface and the second plate surface are used for arranging sintered sheets. The fin substrates can be arranged in an array mode through the fixing parts of the fin substrates, so that the heat exchange efficiency of the mixing chamber can be improved, in addition, sintering pieces can be arranged on the substrate parts of the fin substrates, and the heat exchange efficiency of the mixing chamber is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration, and particularly relates to a fin substrate, a pressing die thereof, a heat exchange component, a mixing chamber and a dilution refrigerator. Background Technique

[0002] In the field of refrigeration, a dilution refrigerator can maintain a temperature in the mK range for a long time, has a large cooling capacity, is not too complex in structure and operation, and is not affected by a magnetic field. Now it is an important refrigeration method for obtaining a temperature in the mK range and can provide a good low-temperature environment for the stable operation of a quantum chip.

[0003] In a dilution refrigerator, as the coldest end of the dilution refrigerator, due to the existence of Kapitza thermal resistance, the heat exchange area also needs to be increased. In order to increase the heat exchange area between the dilution solution and the container wall in the mixing chamber, a structure is generally adopted in which metal powder is sintered on a heat exchange fin and then the heat exchange fin is mechanically fixed on the bottom plate of the mixing chamber. And how to prepare a heat exchange fin and how to make the powder form a sheet structure on the heat exchange fin are technical problems to be solved. Content of the Utility Model

[0004] The purpose of the utility model is to disclose a fin substrate, a pressing die thereof, a heat exchange component, a mixing chamber and a dilution refrigerator to solve the heat exchange problem of the bottom plate of the mixing chamber.

[0005] The utility model provides a fin substrate for use as a heat exchange plate, which comprises a substrate part and a fixing part, and the substrate part and the fixing part are integrally formed; a first surface of the fixing part is flush with a first plate surface of the substrate part, and a second surface of the fixing part is parallel to and higher than a second plate surface of the substrate part; the second plate surface and the first plate surface face away from each other, and the second surface and the first surface face away from each other; fixing holes penetrating through the first surface and the second surface are arranged on the fixing part, and the first plate surface and the second plate surface are used for arranging sintered sheets.

[0006] The utility model provides a pressing die for a dilution refrigerator to press tablets on two opposite first plate surface and second plate surface of the above-mentioned fin substrate; the die comprises a positioning part, a first pressing component, a second pressing component and a clamping plate part;

[0007] The positioning part is provided with a positioning through hole;

[0008] A space for accommodating the fin substrate is formed between the first pressing component and the second pressing component placed in the positioning through hole, and the space can match the edge of the fin substrate;

[0009] The first tablet pressing component includes a first pressing block and a second lining strip, and the second tablet pressing component includes a second pressing block and a third lining strip; the first pressing block and the second pressing block are removably and relatively movably arranged in the positioning through hole, and the second lining strip and the third lining strip are removably and relatively arranged in the positioning through hole. In the positioning through hole, the first pressing block and the second lining strip are arranged side by side and correspondingly fit the first plate surface and the first surface of the fin substrate, and the second pressing block and the third lining strip are arranged side by side and correspondingly fit the second plate surface and the second surface of the fin substrate;

[0010] The clamping plate member includes a first clamping plate and a second clamping plate, and is used to cover both ends in the axial direction of the positioning through hole to apply a force for pressing the first tablet pressing component and the second tablet pressing component.

[0011] For the tablet pressing die as described above, the second tablet pressing component further includes a fourth lining strip located between the second pressing block and the third lining strip.

[0012] For the tablet pressing die as described above, the second lining strip at least covers the first surface and a part of the first plate surface.

[0013] For the tablet pressing die as described above, the positioning component includes an outer die and a bushing unit. A first through hole is provided in the middle of the outer die. The bushing unit is composed of a plurality of bushing sub-components whose outer edges are attached to the hole wall of the first through hole and arranged in an annular array. The positioning hole for placing the first tablet pressing component, the fin substrate and the second tablet pressing component is formed by enclosing the bushing sub-components of the bushing unit together.

[0014] For the tablet pressing die as described above, the outer die is of an annular structure, the first through hole is cylindrical, and the bushing sub-component has an arc surface that fits the hole wall of the first through hole.

[0015] For the tablet pressing die as described above, the positioning component further includes two relatively spaced-apart first lining strips arranged in the positioning through hole.

[0016] On another aspect of the present invention, a heat exchange component is provided, which includes the fin substrate as described above, and further includes a first sintered sheet and a second sintered sheet correspondingly arranged on the first plate surface and the second plate surface opposite to each other of the substrate part. The first sintered sheet and the second sintered sheet are formed by firing the corresponding first sheet structure and second sheet structure, and the first sheet structure and the second sheet structure are pressed by the above-mentioned tablet pressing die.

[0017] On another aspect of the present invention, a mixing chamber is provided, which includes a base and a heat exchange component arranged on the base. The heat exchange component includes a connecting structure and a plurality of the above-mentioned heat exchange components, and the plurality of heat exchange components are fixed on the base through the connecting structure.

[0018] The present utility model further provides a dilution refrigerator, which includes a mixing chamber, and the mixing chamber is provided with the mixing chamber as described above.

[0019] The beneficial effects of the present utility model are as follows:

[0020] The present application discloses a fin substrate. The fixing part of the fin substrate can arrange multiple fin substrates in an array, thereby improving the heat exchange efficiency of the mixing chamber. In addition, a sintered sheet can be arranged on the substrate part of the fin substrate to further improve the heat exchange efficiency of the mixing chamber.

[0021] A tablet pressing mold disclosed in the present application generates a first sheet-like structure on one side of the fin substrate by using a first tablet pressing component in a positioning component, and generates a second sheet-like structure on the other side of the fin substrate by using a second tablet pressing component. The present application can form sheet-like structures on the upper and lower surfaces of the substrate part in the fin substrate in a set of tablet pressing molds, and when forming the second sheet-like structure, the first sheet-like structure does not need to change its position, avoiding damage to the first sheet-like structure during the process of changing its position, thereby improving the success rate of sintering the sheet-like structures on both sides of the fin substrate.

[0022] The heat exchange component, heat exchange assembly, and dilution refrigerator provided by the present utility model include that sheet-like structures before sintering can be formed on the first plate surface and the second plate surface based on the above-mentioned fin substrate by using the above-mentioned tablet pressing mold, so they have the same beneficial effects and will not be elaborated here. Description of the Drawings

[0023] Figure 1 and Figure 2 is a schematic structural diagram of a fin substrate provided by an embodiment of the present utility model;

[0024] Figure 3 is a schematic structural diagram of a mold provided by an embodiment of the present utility model;

[0025] Figure 4 is a top view of a mold provided by an embodiment of the present utility model after removing the first punch and the second punch;

[0026] Figure 5 is Figure 4 a cross-sectional view in the B-B direction;

[0027] Figure 6 is a top view of the outer mold and the structure inside the outer mold in a mold provided by an embodiment of the present utility model;

[0028] Figure 7 is Figure 6 a cross-sectional view in the A-A direction;

[0029] Figure 8 is Figure 6 an exploded view of.

[0030] Figure 9 Top view of a heat exchange component in a mixing chamber;

[0031] Figure 10 is Figure 9 Cross-sectional view of the heat exchange component in the A-A direction in

[0032] Figure 11 is Figure 10 Enlarged view of part B in

[0033] In the reference numerals of the drawings:

[0034] 1. Fin substrate; 101. First plate surface; 102. Second plate surface; 103. First surface; 104. Second surface; 105. Fixing hole; 2. Outer mold; 201. First through hole; 3. Bushing unit; 31. Bushing sub-component; 41. First lining strip; 42. Second lining strip; 43. Third lining strip; 44. Fourth lining strip; 51. First pressing block; 52. Second pressing block; 61. First clamping plate; 62. Second clamping plate; 63. Vent hole; 64. Third limiting groove; 71. First pressing head; 72. Second pressing head; 8. Bolt assembly; 81. Bolt; 82. Nut; 83. Gasket; 91. First sheet-like structure; 92. Second sheet-like structure; 11. First heat exchange component; 111. First sintered sheet; 112. Second sintered sheet; 113. First gap; 114. Second gap; 12. Second heat exchange component; 200. Connection structure; 300. Base Detailed implementation manners

[0035] In order to enable those skilled in the art of the present technology to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as a limitation to this application.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0037] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] As the coldest end of the dilution refrigerator, in order to increase the heat exchange area, a plurality of heat exchange plates are provided in the mixing chamber, and sintered sheets are formed on the heat exchange plates. In order to array a plurality of heat exchange plates and provide sintered sheets on the heat exchange plates, as Figure 1 and Figure 2 shown, the present application discloses a fin substrate for use as a heat exchange plate, including a substrate portion and a fixing portion, the substrate portion and the fixing portion being integrally formed; a first surface 103 of the fixing portion is flush with a first plate surface 101 of the substrate portion, and a second surface 104 of the fixing portion is parallel and higher than a second plate surface 102 of the substrate portion; the second plate surface 102 and the first plate surface 101 face away from each other, and the second surface 104 and the first surface 103 face away from each other; a fixing hole 105 passing through the first surface 103 and the second surface 104 is provided on the fixing portion, and the first plate surface 101 and the second plate surface 102 are for providing sintered sheets. The present application can array the fin substrate 1 through the fixing portion, thereby improving the heat exchange efficiency of the mixing chamber. In addition, sintered sheets can be provided on the substrate portion of the fin substrate 1, further improving the heat exchange efficiency of the mixing chamber.

[0039] In order to be able to provide sintered sheets on the first plate surface 101 and the second plate surface 102 of the fin substrate 1, first, materials need to be placed on the first plate surface 101 and the second plate surface 102 and pressed into a sheet-like structure, and then the sheet-like structure is sintered to obtain. In order to form a sheet-like structure with a set size at a set position on the first plate surface 101 and the second plate surface 102 of the fin substrate 1, the present application discloses a tablet pressing die, as Figures 3 - 8As shown, it is used for a dilution refrigerator to press tablets on the first plate surface and the second plate surface of the above-mentioned fin substrate which face away from each other. The die includes a positioning member, a first tablet pressing assembly, a second tablet pressing assembly, and a clamping plate member; the positioning member is provided with a positioning through-hole; a space for accommodating the fin substrate 1 is formed between the first tablet pressing assembly and the second tablet pressing assembly placed in the positioning through-hole, and the space can match the edge of the fin substrate 1; the first tablet pressing assembly includes a first pressing block 51 and a second lining strip 42, and the second tablet pressing assembly includes a second pressing block 52 and a third lining strip 43; the first pressing block 51 and the second pressing block 52 are removably and relatively movably arranged in the positioning through-hole, and the second lining strip 42 and the third lining strip 43 are removably and relatively arranged in the positioning through-hole. In the positioning through-hole, the first pressing block 51 and the second lining strip 42 are arranged side by side, and the second pressing block 52 and the third lining strip 43 are arranged side by side. The clamping plate member includes a first clamping plate 61 and a second clamping plate 62, and is used to cover both ends in the axial direction of the positioning through-hole to apply a force for squeezing the first tablet pressing assembly and the second tablet pressing assembly.

[0040] In this embodiment, the tablet pressing die forms a first sheet-like structure 91 on the plate surface of the fin substrate 1 opposite to the first tablet pressing assembly by using the first tablet pressing assembly, and forms a second sheet-like structure 92 on the plate surface of the fin substrate 1 opposite to the second tablet pressing assembly by using the second tablet pressing assembly. Specifically, the first sheet-like structure 91 is formed on the first plate surface 101 of the fin substrate 1 by using the first tablet pressing assembly, and the second sheet-like structure 92 is formed on the second plate surface 102 of the fin substrate 1 by using the second tablet pressing assembly. The die disclosed in this embodiment can support forming sheet-like structures on the first plate surface 101 and the second plate surface 102 of the substrate part in the fin substrate 1 respectively, and when generating the subsequent sheet-like structure, there is no need to change the position of the previously formed sheet-like structure, avoiding damage to the previously formed sheet-like structure during the movement process, thereby ensuring the yield rate of the sheet-like structure before sintering.

[0041] In this embodiment, both the first tablet pressing assembly and the second tablet pressing assembly can be removed from the positioning through-holes, or can be arranged in the positioning through-holes to make the material at the set position on the fin substrate 1 into a sheet structure. Specifically, the first pressing block 51 and the second pressing block 52 are arranged to be capable of relative movement within the positioning through-holes, so as to act on the materials on the opposite plate surfaces. The materials are gradually compressed into a sheet structure during the movement of the pressing blocks towards the plate surfaces. In addition, when forming the corresponding sheet structure, the pressing blocks serve as the pressing components, and when forming another sheet structure, the pressing blocks serve as the components for supporting the fin substrate 1, ensuring that the bottom of the fin substrate 1 is in a flat state when the sheet structure is formed. In a specific solution, the second sheet structure 92 and the first sheet structure 91 are formed successively. The first pressing block 51, the second lining strip 42 and the clamping plate member opposite to the first sheet structure 91 serve as the supporting members for preparing the second sheet structure 92. After the second sheet structure 92 is prepared, the first pressing block 51 is removed from the positioning through-hole and the material is placed. Finally, the first pressing block 51 acts on the material to form the first sheet structure 91. At this time, the second pressing block 52, the third lining strip 43, the second sheet structure 92 and the clamping plate member for forming the second sheet structure 92 serve as the supporting members for supporting the fin substrate 1.

[0042] For the convenience of describing the relative positional relationship between components, the following definitions are made here: In the above-mentioned mold, the length direction of the fin substrate 1 is the connection direction between the fixed part and the substrate part, the width direction is parallel to the substrate part and perpendicular to the length direction, and the height direction is perpendicular to the directions of the substrate part and the fixed part.

[0043] In another embodiment, the second tablet pressing assembly further includes a fourth lining strip 44 located between the second pressing block 52 and the third lining strip 43. In this embodiment, the fourth lining strip 44 is used to be arranged on the second plate surface 102 and fit with the side wall of the fixed part in the fin substrate 1. The present application can determine the distance between the second sheet structure 92 and the fixed part of the fin substrate 1 according to the set length of the fourth lining strip 44, so that a first gap is formed between the second sintered sheet formed by sintering the second sheet structure 92 and the fixed part, wherein the length direction of the fourth lining strip 44 is parallel to the length direction of the fin substrate 1. When fixing the fin substrate 1, the formation of the first gap can effectively prevent the second sintered sheet formed by sintering the second sheet structure 92 from being damaged due to being too close to the fixed part.

[0044] In another embodiment, the second lining strip 42 covers at least the first surface 103 and a part of the first plate surface 101. The second lining strip 42 covers all of the first surface 103, so that no material adheres to the first surface 103 of the fixing part, protecting the fixing holes 105 on the fixing part. Additionally, it also avoids the unstable fixation of adjacent fin substrates 1 due to the adhesion of material on the fixing part. The second lining strip 42 also covers a part of the first plate surface 101, so that there is a set distance between the first sheet-like structure 91 and the fixing part. When the fin substrate 1 is fixed through the fixing part, it can effectively prevent the first sintered sheet formed by sintering the first sheet-like structure 91 from being damaged due to being too close to the fixing part.

[0045] When this mold is specifically applied to the above-mentioned fin substrate 1, before and after the second pressing block 52 applies a force to the material on the fin substrate 1, the distances from the side of the third lining strip 43 facing away from the fixing part and the side of the fourth lining strip 44 facing away from the fin substrate 1 to the second plate surface 102 are both not greater than the distance from the surface of the second pressing block 52 facing away from the fin substrate 1 to the second plate surface 102. This ensures that before the second sheet-like structure 92 with a target thickness is formed, the second pressing block 52 will not cause the force to migrate to the third lining strip 43 or the fourth lining strip 44 because the third lining strip 43 or the fourth lining strip 44 is higher than the second pressing block 52. During the pressing process of the material by the second pressing block 52, the material exerts a force on the outer wall. When the distance between the second plate surface 102 and the second surface 104 needs to be relatively small according to specific circumstances, that is, when the height of the fixing part protruding from the second plate surface 102 is relatively low, if the fourth lining strip 44 is directly set without setting the third lining strip 43 on the second surface 104 of the fixing part, the fourth lining strip 44 is likely to tilt. Therefore, the setting of the third lining strip 43 not only prevents the material from entering the fixing holes 105 of the fixing part, but also can effectively prevent the fourth lining strip 44 from tilting during the process of pressing to form a sheet-like structure.

[0046] To prevent the material from overflowing, the distance from the side of the fourth lining strip 44 facing away from the fin substrate 1 to the second plate surface 102 is greater than the height of the material placed on the second plate surface 102, so as to ensure that the material will not deposit or overflow above the fourth lining strip 44, and also avoid the deviation of the position of the second pressing block 52 and its acting on the fourth lining strip 44. In this embodiment, the side of the fourth lining strip 44 facing away from the fin substrate 1 is flush with the side of the third lining strip 43 facing away from the fin substrate 1.

[0047] In addition, to ensure the positioning effect of the positioning through holes, when both the first pressing sheet assembly and the second pressing sheet assembly are arranged in the positioning through holes, the surface of the lining strip is not higher than the positioning through holes.

[0048] In another embodiment, as Figures 6 - 8As shown, the positioning member includes an outer mold 2 and a bushing unit 3. A first through hole 201 is provided in the middle of the outer mold 2. The bushing unit 3 is composed of a plurality of bushing sub-members 31 arranged in an annular array with their outer edges fitting against the hole wall of the first through hole 201. A positioning through hole for placing the first pressing sheet assembly, the fin substrate 1, and the second pressing sheet assembly is jointly enclosed by the respective bushing sub-members 31 in the bushing unit 3. In this application, the positioning assembly is provided with the bushing unit 3 inside the outer mold 2. After sintering, the first sheet-like structure 91 and the second sheet-like structure 92 on the fin substrate 1 correspondingly form the first sintered sheet and the second sintered sheet. During the demolding process of the integral formed by the bushing unit 3 and the fin substrate 1 from the outer mold 2, the first sintered sheet and the second sintered sheet will not be damaged. Since the bushing unit 3 is composed of a plurality of bushing sub-members 31, the bushing sub-members 31 will spread out after the binding force of the outer mold 2 is removed, and will not damage the first sintered sheet and the second sintered sheet either. The height of the bushing unit 3 is flush with the height of the first through hole 201. The setting of the bushing sub-members 31 makes the allowable tolerance of the acting component for demolding relatively larger than that without the bushing sub-members 31. It only needs to ensure that part of the acting component for demolding acts on the bushing unit 3. When the outer mold 2 directly serves as the positioning component of the fin substrate 1, during demolding, the acting component needs to act on the first pressing sheet assembly or the second pressing sheet assembly. Since the height of the pressing block in the pressing sheet assembly is higher than the height of the lining strip, the acting component for demolding directly acts on the pressing block. In order to ensure the integrity of the sintered sheet on the fin substrate 1, the acting component needs to closely adhere to the first through hole 201, which may cause damage to the inside of the outer mold 2 and is not conducive to the continuous use of the outer mold 2. Therefore, compared with the outer mold 2 directly serving as the positioning component of the fin substrate 1, this application can better maintain the integrity of the sintered sheet on the fin substrate 1 and avoid damage to the inside of the outer mold 2. In addition, the applicable range of the outer mold 2 can be increased by adjusting the bushing sub-members 31.

[0049] In another embodiment, the outer mold 2 is of an annular structure, the first through hole 201 is cylindrical, and the bushing sub-member 31 has an arc surface that fits against the hole wall of the first through hole 201. In this application, the outer mold 2 is of a circular ring structure, and the first through hole 201 in the middle is cylindrical. Compared with a structure with an angle, the cylindrical structure can ensure better integrity of the sintered fins and no damage to the inner wall of the outer mold 2 during the demolding process. In addition, it is convenient for multi-purpose use of one mold. By replacing the internal bushing unit 3, the mold can be applicable to fin substrates 1 of any size. Compared with a shape with an angle, the first through hole 201 makes it more convenient to process the outer mold 2 and the bushing sub-members 31, and can avoid damage to the outer mold 2 under the action of the acting component.

[0050] Since the mixing chamber is of a cylindrical structure and the length direction of the fin substrate 1 is parallel to the height direction of the mixing chamber, in order to maximize the heat exchange effect, it is necessary to increase the number of fin substrates 1 as much as possible. The fin substrates 1 are arranged in an array along the direction of the fixing holes 105. In order to further increase the number of fin substrates 1, the width of the fin substrate 1 near the edge of the mixing chamber is smaller, and the width of the fin substrate 1 near the center position of the mixing chamber is larger. In order to make the same mold applicable to fin substrates 1 of multiple different widths, in one embodiment, the positioning member further includes two opposite and spaced-apart first lining strips 41 disposed in the positioning through holes. The setting of the first lining strips 41 in this application can be used to adjust the size of the positioning through holes to accommodate fin substrates 1 of different sizes. The two first lining strips 41 are vertically arranged on both sides in the width direction of the fin substrate 1, and different widths of the first lining strips 41 are replaced to be applicable to fin substrates 1 of different widths. Setting two first lining strips 41 with the same width can keep the fin substrate 1 always located in the middle of the positioning through hole, wherein the width direction of the first lining strip 41 is parallel to the width direction of the fin substrate 1. In addition, the symmetric setting of the two first lining strips 41 can symmetrically fill the gap between the fin substrate 1 and the first through hole 201 in the width direction, so that only the first lining strips 41, the first pressing component and the second pressing component need to be replaced to meet the processing of the sintered sheets on all fin substrates 1, without the need to correspondingly replace the outer mold 2 and the bushing unit 3, which reduces the cost of the mold while achieving the effect. In addition, the sizes of the first lining strips 41, the first pressing component, the second pressing component and the outer mold 2 can also be kept unchanged, and the mold is made applicable to fin substrates 1 of different sizes by replacing the bushing unit 3.

[0051] In this application, in order to better press the material between the first pressing component and the second pressing component and prevent deviation during the pressing process, in one embodiment, a first limiting groove is provided on the inner side of the first clamping plate 61 and / or the second clamping plate 62, and the inner side wall of the first limiting groove matches the outer side wall of the outer mold 2. When applying a force to the components between the first clamping plate 61 and the second clamping plate 62, the setting of the first limiting groove can prevent sliding between the clamping plate and the contacted components.

[0052] Specifically, a plurality of splint holes are provided on both the first splint 61 and the second splint 62. The splint holes are located outside the outer mold 2. The first splint 61 and the second splint 62 are fixedly connected by a bolt assembly 8 passing through the splint holes. The bolt assembly 8 includes a bolt 81, a nut 82, and a gasket 83. The bolt 81 passes through the first splint 61 and the second splint 62 and is fixedly connected by the nut 82, and the gasket 83 is provided on the bolt 81. The setting of the gasket 83 can utilize the resilience of the gasket 83 to offset the shrinkage of the sheet structure during sintering, so that the sheet structure is continuously stressed during sintering, making the mold not only applicable to making the material into a sheet structure, but also applicable to the process of sintering the sheet structure into a sintered sheet.

[0053] Specifically, vent holes 63 are further provided in the middle of the first splint 61 and the second splint 62, so that when the first splint 61 and the second splint 62 act on the first pressing block 51 and the second pressing block 52, the gas generated by the extrusion of the material can be discharged from the vent holes 63.

[0054] Specifically, a second limiting groove is provided on the side of the first splint 61 facing away from the outer mold 2, and a third limiting groove 64 is provided on the side of the second splint 62 facing away from the outer mold 2. The acting components include a first pressing head 71 and a second pressing head 72. The first pressing head 71 can be matched and arranged in the second limiting groove to press the first splint 61, and the second pressing head 72 can be matched and arranged in the third limiting groove to press the second splint 62.

[0055] In another embodiment, the present application also discloses a method for preparing a sheet structure on the fin substrate 1 using the above-mentioned tablet pressing mold, including:

[0056] Using the first splint in the splint member as a support plate, arranging a positioning member on the first splint, and placing a first tablet pressing assembly or a second tablet pressing assembly in the positioning through hole of the positioning member;

[0057] Placing the fin substrate 1 in a set direction, so that one of the tablet pressing assemblies in the first tablet pressing assembly and the second tablet pressing assembly is attached to the corresponding plate surface of the substrate portion;

[0058] Then, place the lining strip in the other tablet pressing assembly, place the material on the plate surface where the tablet pressing assembly is not attached, then place the pressing block in the other tablet pressing assembly on the material, place the second splint on the pressing block, and extrude the material under the relative acting force of the first splint and the second splint until a sheet structure with a set thickness range is formed;

[0059] Synchronously turn over and invert the first splint, the second splint, and all the components between the first splint and the second splint, and remove the pressing block in the first splint and the tablet pressing assembly close to the first splint;

[0060] Place the material in the feeding slot vacated after removing the pressing block, and then restore and place the removed pressing block and the first clamping plate on the material; under the relative acting force of the first clamping plate and the second clamping plate, extrude the material until another sheet-like structure with a set thickness range is formed.

[0061] In one embodiment, taking Figures 3 to 8 as an example, use the first clamping plate in the clamping plate member as the support plate, set a positioning member on the first clamping plate, and place the first pressing plate assembly or the second pressing plate assembly in the positioning through hole of the positioning member, including:

[0062] Set the outer mold 2 on the first clamping plate 61;

[0063] Circularly array a plurality of bushing sub-components 31 in the first through hole 201 of the outer mold 2, and a positioning through hole is formed in the middle of the bushing unit 3 formed by the plurality of bushing sub-components 31;

[0064] Measure the width of the fin substrate 1; when the width of the fin substrate 1 is less than the width of the positioning through hole, place the first lining strips 41 on both sides corresponding to the width of the fin substrate 1;

[0065] Place the first pressing plate assembly or the second pressing plate assembly with corresponding dimensions between the two first lining strips 41.

[0066] In this embodiment, the positioning member is set by first setting the outer mold 2 and then setting the bushing sub-component 31 in the first through hole 201 of the outer mold 2, so that when demolding the heat exchange component, the acting component acts on the bushing sub-component 31 and the component in the positioning through hole. This solution makes the allowable tolerance range of the acting component design relatively larger than that without setting the bushing sub-component 31. In addition, by measuring the width of the fin substrate 1 and using the two first lining strips 41 to change the width of the positioning through hole, it is always ensured that fin substrates 1 with different widths are applicable to the same outer mold 2 and bushing unit 3.

[0067] In this application, the preparation order of the first sheet-like structure 91 and the second sheet-like structure 92 can be arbitrarily selected, and when preparing the prior sheet-like structure, the pressing plate assembly for preparing the subsequent sheet-like structure serves as the support for the fin substrate 1. When preparing the subsequent sheet-like structure, the previously prepared sheet-like structure and the pressing plate assembly for the previously prepared sheet-like structure serve as the support for the fin substrate 1.

[0068] In one of the embodiments, placing the first pressing plate assembly or the second pressing plate assembly in the positioning through hole of the positioning member specifically includes:

[0069] Place the first pressing plate assembly in the positioning through hole of the positioning member.

[0070] After placing the first pressing plate assembly in the positioning through hole of the positioning member, it includes:

[0071] Place the fin substrate 1 on the first tablet pressing assembly, and the first tablet pressing assembly is attached to the first plate surface 101 of the substrate portion in the fin substrate 1;

[0072] Place the third lining strip 43 on the fin substrate 1, place the material on the second plate surface 102, then place the second pressing block 52 in the second tablet pressing assembly on the material, and then place the second clamping plate 62 on the second pressing block 52. Under the relative acting force of the first clamping plate 61 and the second clamping plate 62, the material is extruded until a second sheet-like structure 92 with a set thickness range is formed;

[0073] Flip and invert the first clamping plate 61, the second clamping plate 62, and all components between the first clamping plate 61 and the second clamping plate 62, and remove the first pressing block 51 in the first tablet pressing assembly;

[0074] Place the material in the material placing groove vacated after removing the first pressing block 51, then restore and place the removed first pressing block 51 and the first clamping plate 61 on the material. Under the relative acting force of the first clamping plate 61 and the second clamping plate 62, the material is extruded until a first sheet-like structure 91 with a set thickness range is formed.

[0075] In one of the solutions, in order to provide a first gap 113 between the second sheet-like structure 92 and the fixing portion, placing the third lining strip 43 on the fin substrate 1 and placing the material on the second plate surface 102 includes: after placing the third lining strip 43 on the fin substrate 1, arranging a fourth lining strip 44 on the second plate surface 102, the fourth lining strip 44 being attached to the side wall of the fixing portion in the fin substrate 1, and placing the material on the second plate surface 102 outside the fourth lining strip 44.

[0076] In this embodiment, the first tablet pressing assembly first attaches to the first plate surface 101 and the first surface 103, where the first plate surface 101 and the first surface 103 are flush. The first pressing block 51 and the second lining strip 42 in the first tablet pressing assembly are placed on the first clamping plate 61, and the upper planes facing the fin substrate 1 are flush. Placing the second lining strip 42 on the second surface 104 of the fixing portion can prevent the material from entering the fixing hole 105 in the fixing portion.

[0077] In another embodiment, placing the first tablet pressing assembly or the second tablet pressing assembly in the positioning through hole of the positioning member specifically means: placing the second tablet pressing assembly in the positioning through hole of the positioning member.

[0078] In one of the solutions, in order to provide a first gap 113 between the second sheet-like structure 92 and the fixing portion, placing the second tablet pressing assembly in the positioning through hole of the positioning member includes:

[0079] Place a third lining strip 43, a fourth lining strip 44 and a second pressing block 52 in the positioning through-hole of the positioning member, wherein the fourth lining strip 44 is located between the third lining strip 43 and the second pressing block 52.

[0080] After placing the second pressing plate assembly in the positioning through-hole of the positioning member, it includes:

[0081] Place the fin substrate 1 on the second pressing plate assembly, and the second pressing plate assembly is attached to the second plate surface 102 of the substrate portion in the fin substrate 1; wherein the protruding fixing portion in the fin substrate 1 is attached to the third lining strip 43, the fourth lining strip 44 is attached to the side wall of the fixing portion and the second plate surface 102, and the second pressing block 52 is attached to the second plate surface 102 of the fin substrate 1.

[0082] Place the second lining strip 42 on the fin substrate 1, place the material on the first plate surface 101, then place the first pressing block 51 in the first pressing plate assembly on the material, and then place the second clamping plate 62 on the first pressing block 51. Under the relative acting force of the first clamping plate 61 and the second clamping plate 62, the material is extruded until the first sheet-like structure 91 with a set thickness range is formed.

[0083] Turn the first clamping plate 61 and the second clamping plate 62 and all the components between the first clamping plate 61 and the second clamping plate 62 upside down, and remove the second pressing block 52 in the first clamping plate 61 and the second pressing plate assembly.

[0084] Place the material in the feeding groove vacated after removing the second pressing block 52, then place the removed second pressing block 52 and the first clamping plate 61 back on the material. Under the relative acting force of the first clamping plate 61 and the second clamping plate 62, the material is extruded until the second sheet-like structure 92 with a set thickness range is formed.

[0085] Based on the same application concept, as Figures 9 - 11 shown, an embodiment of the present application further proposes a heat exchange component, including the above-mentioned fin substrate 1, and further including a first sintered sheet and a second sintered sheet correspondingly arranged on the first plate surface 101 and the second plate surface 102. The first sintered sheet 111 and the second sintered sheet 112 are formed by firing the corresponding first sheet-like structure and second sheet-like structure, and the first sheet-like structure 91 and the second sheet-like structure are pressed by the above-mentioned pressing die and the above-mentioned pressing method.

[0086] As Figures 9 - 11 shown, based on the same application concept, an embodiment of the present application further proposes a heat exchange assembly, including a connection structure 200 and a plurality of the above-mentioned heat exchange components. The plurality of heat exchange components are fixedly arranged on the connection structure 200 in an array through the fixing holes 105. Specifically, at least two fixing holes 105 are arranged on each fixing portion, so as to prevent the heat exchange components from moving relative to each other.

[0087] To ensure the normal fixation of adjacent heat exchange components, the sum of the thicknesses of the first sintered sheet 111 and the second sintered sheet 112 on each heat exchange component is less than the distance between the second surface 104 of the fixing part and the second plate surface 102. Taking the first heat exchange component 11 and the second heat exchange component 12 arranged adjacent to each other as an example, the second sintered sheet 112 of the second heat exchange component 12 and the first sintered sheet 111 of the first heat exchange component 11 are both located in the space between the second plate surface 102 and the second surface 104 of the second heat exchange component 12. To increase the heat exchange effect, a second gap 114 is provided between the second sintered sheet 112 of the second heat exchange component 12 and the first sintered sheet 111 of the first heat exchange component 11. To facilitate the use of the same mold to prepare the heat exchange components, the first sintered sheet 111 of the first heat exchange component 11 and the second sintered sheet 112 of the second heat exchange component 12 have the same thickness, and the sum of the thicknesses of the first sintered sheet 111 and the second sintered sheet 112 of each heat exchange component is less than the distance between the second surface 104 of the fixing part and the second plate surface 102.

[0088] Based on the same inventive concept, an embodiment of the present application further provides a mixing chamber, including a base 300 and a heat exchange assembly disposed on the base 300, and the heat exchange assembly is fixed to the base 300 through a connection structure 200. The base 300 is provided as an inverted T structure, the horizontal part is fixed in the mixing chamber, and the vertical part is provided with a through hole through which the connection structure 200 passes, so that the base 300 and the heat exchange assembly are connected and fixed through the connection structure 200. The connection structure 200 can be a screw assembly.

[0089] Based on the same inventive concept, an embodiment of the present application further provides a dilution refrigerator, including a mixing chamber, and the mixing chamber described above is disposed in the mixing chamber.

[0090] In the description of this specification, the description with reference to terms such as "some embodiments" or "examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0091] The above are only the preferred embodiments of the present utility model and do not impose any restrictive effect on the present utility model. Any person skilled in the relevant technical field, without departing from the scope of the technical solution of the present utility model, makes any form of equivalent replacement or modification and other changes to the technical solution and technical content disclosed by the present utility model, which are all within the content of the technical solution of the present utility model and still fall within the protection scope of the present utility model.

Claims

1. A fin substrate, characterized in that: Used as a heat exchange plate, comprising a substrate part and a fixing part, the substrate part and the fixing part are integrally formed; the first surface of the fixing part is flush with the first plate surface of the substrate part, the second surface of the fixing part is parallel to and higher than the second plate surface of the substrate part; the second plate surface is separated from the first plate surface, and the second surface is separated from the first surface; the fixing part is provided with a fixing hole passing through the first surface and the second surface, and the first plate surface and the second plate surface are used to set the sintered sheet.

2. A tabletting die, characterized in that: Used in a dilution refrigerator to press the fin substrate on the first and second opposite sides of the fin substrate according to claim 1; the mold comprises a positioning member, a first pressing member, a second pressing member and a clamping member; The positioning piece is provided with a positioning through hole; A space for accommodating the fin substrate is formed between the first pressing sheet assembly and the second pressing sheet assembly placed in the positioning through hole, and the space can match the edge of the fin substrate; The first pressing sheet assembly includes a first pressing block and a second lining strip, and the second pressing sheet assembly includes a second pressing block and a third lining strip; the first pressing block and the second pressing block are removably and relatively movably arranged in the positioning through hole, and the second lining strip and the third lining strip are removably and relatively arranged in the positioning through hole. In the positioning through hole, the first pressing block and the second lining strip are arranged side by side and correspondingly fit the first plate surface and the first surface of the fin substrate, and the second pressing block and the third lining strip are arranged side by side and correspondingly fit the second plate surface and the second surface of the fin substrate; The clamping plate member comprises a first clamping plate and a second clamping plate, which are used to cover the two ends of the positioning through hole in the axial direction to exert a force to compress the first pressing sheet assembly and the second pressing sheet assembly.

3. The tabletting die according to claim 2, wherein: The second pressing sheet assembly further includes a fourth lining strip located between the second pressing block and the third lining strip.

4. The tabletting die according to claim 2 or 3, wherein: The second lining strip at least covers the first surface and a portion of the first panel surface.

5. The tabletting die according to claim 2, wherein: The positioning assembly includes an outer mold and a bushing unit, a first through hole is arranged in the middle of the outer mold, and the bushing unit is composed of a plurality of bushing sub-components arranged in a circular array with their outer edges fitting the hole wall of the first through hole. The bushing sub-components of the bushing unit are together enclosed to form a positioning hole for placing the first pressing sheet assembly, the fin substrate and the second pressing sheet assembly.

6. The tabletting die according to claim 5, wherein: The outer mold is an annular structure, the first through hole is cylindrical, and the bushing sub-component has an arc surface that fits the hole wall of the first through hole.

7. The tabletting die according to claim 5, wherein: The positioning assembly further includes two first lining strips which are opposite to each other and spaced apart from each other and are arranged in the positioning through hole.

8. A heat exchange component, characterized in that: It includes the fin substrate as described in claim 1, and also includes a first sintered sheet and a second sintered sheet correspondingly arranged on a first plate surface and a second plate surface opposite to each other of the substrate portion, the first sintered sheet and the second sintered sheet are formed by firing the corresponding first sheet structure and the second sheet structure, and the first sheet structure and the second sheet structure are pressed by the tablet pressing mold described in any one of claims 1-7.

9. A mixing chamber, characterized in that The invention comprises a base and a heat exchange component arranged on the base, wherein the heat exchange component comprises a connection structure and a plurality of heat exchange components according to claim 8, and the plurality of heat exchange components are fixed on the base through the connection structure.

10. A dilution refrigerator, characterized in that The invention comprises a mixing chamber in which the mixing chamber according to claim 9 is arranged.

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