Cold conduction and shock absorption assembly for dilution refrigerator and dilution refrigerator

Abstract

The utility model discloses a cold conduction and shock absorption assembly for a dilution refrigerator and the dilution refrigerator. The cold conduction and shock absorption assembly comprises a first soft metal belt, a second soft metal belt, a first cold disc and a second cold disc. A through hole for a refrigerator of the dilution refrigerator to penetrate through is formed in the first cold disc; one side of the first soft metal belt is connected with the refrigerator, and the other side of the first soft metal belt is connected with the surface of the first cold disc; one side of the second soft metal belt is connected with the refrigerator, and the other side of the second soft metal belt is connected with the surface of the second cooling disc. The first soft metal belt and the second soft metal belt are arranged at the joint of the refrigerator and the first cold disc and the joint of the refrigerator and the second cold disc respectively, and the first soft metal belt and the second soft metal belt have certain cold conduction performance and flexibility, so that the cold quantity of the refrigerator is conducted to the first cold disc and the second cold disc; and vibration generated when the refrigerator works can be reduced, and normal work of the quantum chip is guaranteed.

Description

Technical Field

[0001] The present application belongs to the field of extremely low temperatures, and specifically relates to a cooling and damping component for a dilution refrigerator and a dilution refrigerator. Background Art

[0002] The ultra-low temperature zone refers to a low-temperature environment with a temperature below 1K. Basic physics research can be carried out at extremely low temperatures, and it can also provide an extreme low-temperature environment for quantum computing. For the ultra-low temperature environment required by quantum computing, the temperature is usually as low as 10mK, and a dilution refrigerator is generally used to provide the low-temperature environment.

[0003] To meet the requirement of achieving a minimum temperature of less than 10mK, existing dilution refrigerators use a multi-temperature zone layer-by-layer cooling method. Typically, a dilution refrigerator includes a refrigerator (such as a pulse tube cooling unit), which is used in the pre-cooling stage to reduce the temperature to a range close to liquid helium (about 4K).

[0004] When the refrigerator starts cooling, it will be accompanied by relatively strong vibrations, which will bring additional environmental noise to the quantum chip and affect its normal operation.

[0005] Typically, the refrigerator is connected to a cold plate inside a dilution refrigerator housing. How to reasonably connect the two to balance the pre-cooling effect of the pulse refrigerator and reduce the impact of refrigerator vibration on the quantum chip is a technical problem that needs to be urgently solved in this field.

[0006] It should be noted that the information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Utility Model Content

[0007] The purpose of the utility model is to provide a cooling and damping assembly for a dilution refrigerator and a dilution refrigerator, which can ensure that the cooling capacity of the refrigerator is transferred to the first cold plate and the second cold plate, while reducing the vibration generated when the refrigerator is working, thereby ensuring the normal operation of the quantum chip.

[0008] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0009] A first aspect of the present invention provides a cooling and damping assembly for a dilution refrigerator, comprising a first soft metal belt, a second soft metal belt, a first cold plate, and a second cold plate;

[0010] The first cold plate is provided with a through hole for the cooler of the dilution refrigerator to pass through;

[0011] One side of the first soft metal belt is connected to the refrigerator, and the other side is connected to the surface of the first cold plate;

[0012] One side of the second soft metal belt is connected to the refrigerator, and the other side is connected to the surface of the second cold plate.

[0013] The cooling and damping assembly for a dilution refrigerator as described above, further, the first soft metal belt is provided in plurality, and the plurality of first soft metal belts are distributed at intervals around the refrigerator or arranged in a straight line;

[0014] A plurality of the second soft metal belts are provided, and the plurality of the second soft metal belts are distributed at intervals around the refrigerator or arranged in a straight line.

[0015] The cooling and damping assembly for a dilution refrigerator as described above, further, the first soft metal belt and the second soft metal belt are both bent at least once.

[0016] In the cooling and damping assembly for a dilution refrigerator as described above, further, the first soft metal belt and the second soft metal belt are both bent into an arc shape.

[0017] In the cooling and damping assembly for a dilution refrigerator as described above, further, the opening direction of the first soft metal belt faces the first cold plate, and the opening direction of the second soft metal belt is parallel to the second cold plate.

[0018] The cooling and damping assembly for a dilution refrigerator as described above, further, the refrigerator is provided in plurality, and the first cold plate is provided with a plurality of through holes for the plurality of refrigerators to pass through;

[0019] The plurality of refrigerators are evenly arranged around the center line of the first cold plate; and the arrangement directions of the plurality of second soft metal belts connected to different refrigerators are different from each other.

[0020] The cooling and damping assembly for a dilution refrigerator as described above, further comprising a cooling and damping sealing tube;

[0021] The cooling sealing tube is sleeved on a portion of the refrigerator, one end of the cooling sealing tube is sealed and fixed on the refrigerator, and the other end of the cooling sealing tube passes through the through hole and is sealed and fixed on the first cold plate;

[0022] The one side of the first soft metal belt is connected to the cooling sealing tube.

[0023] The cooling and shock-absorbing assembly for a dilution refrigerator as described above, further, has first metal plates extending outward from both sides of the first soft metal belt, and second metal plates extending outward from both sides of the second soft metal belt, and the two sides of the first soft metal belt are respectively connected to the refrigerator and the surface of the first cold plate through the first metal plates, and the two sides of the second soft metal belt are respectively connected to the refrigerator and the surface of the second cold plate through the second metal plates.

[0024] The cooling and damping assembly for a dilution refrigerator as described above, further, the first soft metal belt is woven from multiple strands of metal wire, and the first metal plate is formed by crimping multiple strands of metal wire;

[0025] And / or, the second soft metal belt is braided by multiple strands of metal wires, and the second metal plate is formed by crimping multiple strands of metal wires.

[0026] In another aspect, the present invention provides a dilution refrigerator, comprising the above-mentioned cooling and shock-absorbing component and the refrigerator.

[0027] The beneficial effects of the present invention are:

[0028] By respectively arranging the first soft metal belt and the second soft metal belt at the connection between the refrigerator and the first cold plate and the refrigerator and the second cold plate, since the first soft metal belt and the second soft metal belt have certain cooling performance and flexibility, while ensuring that the cooling energy of the refrigerator is transferred to the first cold plate and the second cold plate, it can also reduce the vibration generated when the refrigerator is working, thereby ensuring the normal operation of the quantum chip.

[0029] The dilution refrigerator provided by the present invention includes the above-mentioned cooling and damping components, and thus has the same beneficial effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a cooling and damping assembly for a dilution refrigerator provided by an embodiment of the present invention;

[0031] Figure 2 This is a structural schematic diagram of the connection between the cooling sealing tube, the second cold plate and the refrigerator provided in an embodiment of the present invention.

[0032] In the accompanying drawings: 10, first cold plate; 20, second cold plate; 30, first soft metal belt; 40, second soft metal belt; 50, cold-conducting sealing tube; 60, refrigerator; 61, first cold head; 62, second cold head. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Figure 1 The present invention provides a cooling and damping component for a dilution refrigerator, such as Figure 1 As shown: An embodiment of the present application discloses a cooling and shock-absorbing assembly for a dilution refrigerator, comprising a first soft metal belt 30, a second soft metal belt 40, a first cold plate 10, and a second cold plate 20; the first cold plate 10 is provided with a through hole for a refrigerator 60 of the dilution refrigerator to pass through; one side of the first soft metal belt 30 is connected to the refrigerator 60, and the other side is connected to the surface of the first cold plate 10; one side of the second soft metal belt 40 is connected to the refrigerator 60, and the other side is connected to the surface of the second cold plate 20.

[0037] In this embodiment, a first soft metal belt 30 and a second soft metal belt 40 are respectively provided at the connection between the refrigerator 60 and the first cold plate 10 and the refrigerator 60 and the second cold plate 20. Since the first soft metal belt 30 and the second soft metal belt 40 have certain cooling performance and flexibility, while ensuring that the cooling capacity of the refrigerator 60 is transferred to the first cold plate 10 and the second cold plate 20, the vibration generated during the operation of the refrigerator 60 can be reduced, thereby ensuring the normal operation of the quantum chip.

[0038] The type of the refrigerator 60 in this embodiment is not specifically limited. Exemplarily, the refrigerator 60 is a pulse tube cooling unit, which includes a first cold head 61 and a second cold head 62 connected in sequence through a pipe; one side of the first soft metal belt 30 is connected to the first cold head 61 of the refrigerator 60, and one side of the second soft metal belt 40 is connected to the second cold head 62 of the refrigerator 60.

[0039] In this embodiment, the number and arrangement of the first soft metal belt 30 and the second soft metal belt 40 are not specifically limited. In order to further improve the cooling effect and shock resistance, in some implementations of this embodiment, a plurality of first soft metal belts 30 are provided, and the plurality of first soft metal belts 30 are distributed at intervals around the refrigerator 60 or arranged in a straight line; a plurality of second soft metal belts 40 are provided, and the plurality of second soft metal belts 40 are distributed at intervals around the refrigerator 60 or arranged in a straight line.

[0040] In this embodiment, the shapes of the first and second soft metal belts 30, 40 are not specifically limited. To further improve seismic performance, in some implementations of this embodiment, each of the first and second soft metal belts 30, 40 is bent at least once. In this embodiment, the first and second soft metal belts 30, 40 can be bent into an arc or a zigzag shape. An arc, compared to a zigzag shape, can further improve seismic performance. For example, the first and second soft metal belts 30, 40 are C-shaped, U-shaped, or S-shaped.

[0041] To further enhance shock resistance, in some implementations of this embodiment, the opening of the first soft metal strip 30 faces the first cold plate 10, while the opening of the second soft metal strip 40 is parallel to the second cold plate 20. Due to the different opening directions of the first and second soft metal strips 30, 40, the cooling and shock absorbing assembly of this embodiment can achieve shock absorption in different directions, thereby enhancing the shock absorption effect.

[0042] In order to further improve the cooling performance, in some implementations of this embodiment, Figure 2 The schematic diagram of the structure of the connection between the cooling sealing tube, the second cold plate and the refrigerator provided in the embodiment of the present invention is as follows: Figure 2As shown, the cooling and shock-absorbing assembly further includes a cooling sealing tube 50; the cooling sealing tube 50 is sleeved over a portion of the refrigerator 60, with one end of the cooling sealing tube 50 sealed and fixed to the refrigerator 60, and the other end of the cooling sealing tube 50, which passes through the through-hole, is sealed and fixed to the first cold plate 10; one side of the first soft metal belt 30 is connected to the cooling sealing tube 50. The provision of the cooling sealing tube 50 prevents heat from being conducted from the through-hole to the lower temperature zone below the first cold plate 10 (the temperature zone where the second cold plate 20 is located), thereby ensuring a cooling effect.

[0043] In order to further improve the cooling performance, in some implementations of this embodiment, first metal plates are extended outward on both sides of the first soft metal belt 30, and second metal plates are extended outward on both sides of the second soft metal belt 40. The two sides of the first soft metal belt 30 are respectively connected to the side wall of the refrigerator 60 and the surface of the first cold plate 10 through the first metal plates, and the two sides of the second soft metal belt 40 are respectively connected to the end face of the refrigerator 60 and the surface of the second cold plate 20 through the second metal plates.

[0044] By setting the first metal plate and the second metal plate, since the first metal plate and the second metal plate are plate-like structures and the contact surface is flat, the first metal plate can be in good contact with the refrigerator 60 and the first cold plate 10, and the second metal plate can be in good contact with the refrigerator 60 and the second cold plate 20, thereby greatly improving the cooling performance.

[0045] To further improve cooling performance and seismic resistance, in some implementations of this embodiment, the first soft metal strip 30 is woven from multiple strands of metal wire, and the first metal plate is formed by crimping multiple strands of metal wire together. Because the first soft metal strip 30 is woven from multiple strands of metal wire, it maintains both cooling performance and flexibility, making it easier to bend and install while also improving seismic resistance. Because the first metal plate is crimped from multiple strands of metal wire together, the first metal plate and first soft metal strip 30 form an integrated structure, ensuring good contact and significantly improving cooling performance.

[0046] To further improve cooling performance and seismic resistance, in some implementations of this embodiment, the second soft metal belt 40 is woven from multiple strands of metal wire, and the second metal plate is formed by crimping multiple strands of metal wire together. Because the second soft metal belt 40 is woven from multiple strands of metal wire, it maintains both cooling performance and flexibility, making it easier to bend and install while also improving seismic resistance. Because the second metal plate is crimped from multiple strands of metal wire together, the second metal plate and second soft metal belt 30 form an integrated structure, ensuring good contact and significantly improving cooling performance.

[0047] In one implementation of this embodiment, the diameter of a single strand of the multiple metal strands is no greater than 0.15 mm. It will be appreciated that by using very fine metal strands and twisting multiple strands together to form a metal braid, the multiple strands are tightly braided and in better contact, resulting in a braided metal braid with improved cooling properties.

[0048] To further enhance cooling performance, the surfaces of the first and second metal plates are plated with a metal layer. The metal layer is made of gold. The first and second metal plates are located within a dilution refrigerator, where the ambient temperature is relatively low and prone to oxidation. Electroplating the first and second metal plates with a layer of gold prevents oxidation and ensures stable cooling performance.

[0049] To further enhance cooling and seismic performance, the first and second soft metal strips 30 and 40, as well as the cooling sealing tube 50, are all made of oxygen-free copper. Oxygen-free copper offers excellent flexibility and cooling performance, so its use improves both cooling and seismic performance.

[0050] In this embodiment, the number of refrigerators 60 is not specifically limited, and can be one or more. For example, Figure 1 As shown, three refrigerators 60 are provided.

[0051] To improve pre-cooling efficiency, in some implementations of this embodiment, multiple coolers 60 are provided, and the first cold plate 10 is provided with multiple through-holes for the multiple coolers 60 to pass through. To further enhance vibration damping, the multiple coolers 60 are evenly arranged around the centerline of the first cold plate 10; and the multiple second soft metal belts 40 connected to different coolers 60 are arranged in different directions.

[0052] Several specific examples are given below regarding the structure and layout of a plurality of first soft metal belts 30 and a plurality of second soft metal belts 40 connected to a refrigerator 60 .

[0053] Example 1: The first soft metal belt 30 and the second soft metal belt 40 are both U-shaped, the U-shaped opening of the first soft metal belt 30 faces the first cold plate 10, and the U-shaped opening of the second soft metal belt 40 is parallel to the second cold plate 20. Multiple first soft metal belts 30 are arranged in a circle around the refrigerator 60; multiple second soft metal belts 40 are arranged in a circle around the refrigerator 60.

[0054] Example 2: The first soft metal belt 30 and the second soft metal belt 40 are both U-shaped, with the U-shaped opening of the first soft metal belt 30 facing the first cold plate 10, and the U-shaped opening of the second soft metal belt 40 parallel to the second cold plate 20. Multiple first soft metal belts 30 are arranged in a circle around the refrigerator 60; and multiple second soft metal belts 40 are arranged in a straight line.

[0055] Example 3: The first soft metal belt 30 and the second soft metal belt 40 are both S-shaped, and multiple first soft metal belts 30 are arranged in a circle around the refrigerator 60; multiple second soft metal belts 40 are arranged in a circle around the refrigerator 60.

[0056] Based on the same application concept, the present application also provides a dilution refrigerator, including the above-mentioned conduction cooling and damping assembly, and the refrigerator 60. The dilution refrigerator of the present application includes the above-mentioned conduction cooling and damping assembly, and thus has the same beneficial effects as the above-mentioned conduction cooling and damping assembly, which will not be described in detail here.

[0057] 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 reconcile the different embodiments or examples described in this specification.

[0058] 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 cooling and damping assembly for a dilution refrigerator, characterized in that: It includes a first soft metal belt, a second soft metal belt, a first cold plate and a second cold plate; The first cold plate is provided with a through hole for the cooler of the dilution refrigerator to pass through; One side of the first soft metal belt is connected to the refrigerator, and the other side is connected to the surface of the first cold plate; One side of the second soft metal belt is connected to the refrigerator, and the other side is connected to the surface of the second cold plate.

2. The cooling and damping assembly for a dilution refrigerator according to claim 1, characterized in that: There are a plurality of the first soft metal belts, and the plurality of the first soft metal belts are distributed at intervals around the refrigerator or arranged in a straight line; A plurality of the second soft metal belts are provided, and the plurality of the second soft metal belts are distributed at intervals around the refrigerator or arranged in a straight line.

3. The cooling and damping assembly for a dilution refrigerator according to claim 1, characterized in that: The first soft metal strip and the second soft metal strip are each bent at least once.

4. The cooling and damping assembly for a dilution refrigerator according to claim 3, characterized in that: The first soft metal belt and the second soft metal belt are both bent into an arc shape.

5. The cooling and damping assembly for a dilution refrigerator according to claim 4, characterized in that: The opening direction of the first soft metal belt faces the first cold plate, and the opening direction of the second soft metal belt is parallel to the second cold plate.

6. The cooling and damping assembly for a dilution refrigerator according to claim 2, characterized in that: There are multiple refrigerators, and the first cold plate is provided with multiple through holes for the multiple refrigerators to pass through; The plurality of refrigerators are evenly arranged around the center line of the first cold plate; and the arrangement directions of the plurality of second soft metal belts connected to different refrigerators are different from each other.

7. The cooling and damping assembly for a dilution refrigerator according to claim 1, characterized in that: The cooling and shock absorbing assembly further includes a cooling sealing tube; The cooling sealing tube is sleeved on a portion of the refrigerator, one end of the cooling sealing tube is sealed and fixed on the refrigerator, and the other end of the cooling sealing tube passes through the through hole and is sealed and fixed on the first cold plate; The one side of the first soft metal belt is connected to the cooling sealing tube.

8. The cooling and damping assembly for a dilution refrigerator according to claim 1 or 7, characterized in that: A first metal plate extends outward from both sides of the first soft metal belt, and a second metal plate extends outward from both sides of the second soft metal belt. The two sides of the first soft metal belt are respectively connected to the refrigerator and the surface of the first cold plate through the first metal plates, and the two sides of the second soft metal belt are respectively connected to the refrigerator and the surface of the second cold plate through the second metal plates.

9. The cooling and damping assembly for a dilution refrigerator according to claim 8, characterized in that: The first soft metal strip is braided from multiple strands of metal wire, and the first metal plate is formed by crimping multiple strands of metal wire; And / or, the second soft metal belt is braided by multiple strands of metal wires, and the second metal plate is formed by crimping multiple strands of metal wires.

10. A dilution refrigerator, characterized in that: It comprises the cooling and shock-absorbing component according to any one of claims 1 to 9, and a refrigerator.

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