Helium III adsorption carbon bag for helium III plug-in

Abstract

The invention relates to the technical field of extremely-low-temperature refrigerating systems, in particular to a helium-3 adsorption carbon bag for helium-3 plug-ins, which comprises a carbon bag shell, the upper side and the lower side in the carbon bag shell are communicated with a helium-3 adsorption carbon bag upper pipe and a helium-3 adsorption carbon bag lower pipe respectively, and activated carbon is arranged in the carbon bag shell. A carbon bag upper flange and a carbon bag lower flange are fixedly installed on the upper side and the lower side in the carbon bag shell respectively, and a first threaded hole and a second threaded hole are formed in the opposite sides of the carbon bag upper flange and the carbon bag lower flange respectively. The heat conduction column is arranged in the carbon bag shell, on one hand, the heating wire can make direct contact with activated carbon, and rapid temperature returning of the carbon bag can be facilitated; on the other hand, heat is transferred to the structure of the whole carbon bag shell, so that heating sources are formed in the middle and on the inner wall of the carbon bag shell, the maximum heating area of the activated carbon can be obtained, the activated carbon in the middle of the carbon bag shell can be uniformly heated, and the using effect is improved.

Description

Technical Field

[0001] This invention relates to the field of cryogenic refrigeration system technology, and more particularly to a helium-3 adsorption carbon bag for helium-3 inserts. Background Technology

[0002] Helium-3 (H3) modules are widely used refrigeration devices in the cryogenic field, possessing rapid sample changing and cooling capabilities. H3 modules can be used in fundamental research fields including quantum transport, low-temperature physics, and spintronics. H3 modules can provide temperatures of 300 mK or even lower, and can maintain these temperatures for tens of hours or even longer. H3 modules utilize the physical property of liquid helium—the monotonic relationship between saturated vapor pressure and temperature—to achieve the cryogenic environment.

[0003] Helium-3 adsorption carbon bags are containers used to hold activated carbon in helium-3 inserts. Under unheated conditions, the carbon bags are cooled to a low temperature by the surrounding cold helium gas. At low temperatures, activated carbon has a strong adsorption effect on helium. As the activated carbon in the carbon bag adsorbs helium-3, the saturated vapor pressure of helium-3 drops rapidly, thereby achieving the purpose of cooling. When the carbon bag is heated, the activated carbon can quickly release the adsorbed helium-3 gas and re-condense to realize the next adsorption, decompression, and cooling process. This cycle repeats, thus realizing a reversible and continuous process of heating and cooling.

[0004] In existing helium-3 plugs, the carbon bags used to load activated carbon have a heating structure that is only wrapped around the outside of the entire device. The activated carbon inside can only be heated through heat transfer from the outer shell of the carbon bag. Since activated carbon is a material with poor thermal conductivity, the activated carbon in the center of the carbon bag has poor heating effect. Consequently, the release of adsorbed helium-3 gas during heating is incomplete, thus affecting the overall heating and cooling effect. Summary of the Invention

[0005] This invention provides a helium-3 adsorbent carbon bag for helium-3 inserts, to solve the problems of the aforementioned helium-3 inserts where the container for loading liquid helium-3 does not have a specific structure to hold the liquid helium-3, which poses a risk of leakage under extremely low temperature conditions, and also has poor heat transfer performance.

[0006] This invention provides a helium-3 adsorption carbon bag for helium-3 insertion, comprising a carbon bag shell, with an upper and lower helium-3 adsorption carbon bag tube respectively connected to the upper and lower sides of the carbon bag shell. Activated carbon is disposed inside the carbon bag shell. An upper flange and a lower flange are fixedly installed on the upper and lower sides of the carbon bag shell, respectively. A first threaded hole and a second threaded hole are respectively formed on the opposite sides of the upper and lower flanges. A mesh sheet and a lower mesh sheet are fixedly installed on the opposite sides of the upper and lower flanges, respectively. Both the mesh sheet and the lower mesh sheet have through holes corresponding to the first and second threaded holes, respectively. The centers of the upper and lower flanges are respectively... The device has a first through hole and a second through hole. The upper tube of the helium-3 adsorption carbon bag extends into the first through hole and is fixedly connected to its inner wall. The lower tube of the helium-3 adsorption carbon bag extends into the second through hole and is fixedly connected to its inner wall. A heat-conducting column welding groove is opened at the top of the lower flange of the carbon bag and on both sides of the second through hole. A heat-conducting column passing through the lower mesh is fixedly installed inside the heat-conducting column welding groove. Two insulating terminals extending to the upper part of the upper flange of the carbon bag are fixedly installed inside the upper flange. An enameled wire heating wire is wound around the outside of one side of the heat-conducting column and around the outside of the other side of the heat-conducting column. A wire passing through the insulating terminal and fixedly connected to it is provided above the upper flange of the carbon bag. The two ends of the heating wire are fixedly connected to the wire respectively.

[0007] Preferably, the outer shell of the charcoal bag is provided with fins.

[0008] Preferably, the outer shell of the carbon bag, the upper flange of the carbon bag, the lower flange of the carbon bag, and the heat-conducting column are all made of oxygen-free copper.

[0009] Preferably, both the upper and lower mesh sheets are made of stainless steel.

[0010] Preferably, the upper flange and lower flange of the carbon pack are both welded to the inner wall of the carbon pack shell, the upper tube of the helium-3 adsorption carbon pack is fixed to the upper flange of the carbon pack by welding, and the lower tube of the helium-3 adsorption carbon pack and the heat-conducting column are both fixedly connected to the lower flange of the carbon pack by welding.

[0011] Preferably, the upper flange of the carbon bag and the lower flange of the carbon bag are respectively provided with a first auxiliary threaded hole and a second auxiliary threaded hole on opposite sides.

[0012] The technical solutions provided in the embodiments of the present invention have the following advantages compared with the prior art:

[0013] 1. The structure provided by this invention, by setting a heat-conducting column inside the carbon bag shell, allows the heating wire to directly contact the activated carbon, which facilitates the rapid reheating of the carbon bag. On the other hand, the thermal contact between the heating wire and the heat-conducting column also quickly transfers heat to the entire structure of the carbon bag shell, so that the middle part and the inner wall of the carbon bag shell are both heat sources, allowing the activated carbon to obtain the maximum heating area. This also allows the activated carbon in the middle part of the carbon bag shell to be heated evenly, improving the performance.

[0014] 2. The structure provided by the present invention, through the built-in heating wire, allows the outer surface of the charcoal bag shell to be made into a fin-shaped outer surface. The purpose of the fins is to increase the heat exchange area of ​​the charcoal bag shell, thereby achieving a better heat exchange effect.

[0015] 3. The structure provided by the present invention, through the carbon bag shell made of oxygen-free copper, the upper flange of the carbon bag, the lower flange of the carbon bag, and the heat-conducting column, the oxygen-free copper has good thermal conductivity, which can further improve the effect of rapid heating and cooling.

[0016] 4. In the structure provided by the present invention, the stainless steel mesh is fixed to the upper and lower flanges of the carbon bag through threaded holes, which serves to prevent the activated carbon from falling out of the carbon bag shell.

[0017] 5. The structure provided by the present invention, by providing a first auxiliary threaded hole and a second auxiliary threaded hole, can be conveniently expanded by the user for fixing thermometers, heat sinks or other components. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A bottom view of a helium-3 adsorbed carbon pack;

[0022] Figure 3 This is a top view of a helium-3 adsorbed carbon pack;

[0023] Figure 4 This is a top view of the lower flange of the carbon pack;

[0024] Figure 5 This is a bottom view of the flange on the carbon pack.

[0025] 1. Helium-3 adsorption carbon bag upper tube; 2. Carbon bag upper flange; 3. Wire mesh; 4. Carbon bag outer shell; 5. Heat-conducting column; 6. Lower wire mesh; 7. Carbon bag lower flange; 8. Helium-3 adsorption carbon bag lower tube; 9. Insulating terminal; 10. Fin; 11. Second auxiliary threaded hole; 12. First auxiliary threaded hole; 13. First threaded hole; 14. First through hole; 15. Insulating terminal connection hole; 16. Heat-conducting column welding groove; 17. Second through hole; 18. Second threaded hole; 19. Heating wire. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Various embodiments of the present invention may exist in the form of a range. It should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the present invention. Therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. In addition, whenever a numerical range is indicated in the present invention, it means including any referenced number (fraction or integer) within the indicated range. Unless otherwise specifically stated, all raw materials, reagents, instruments, and equipment used in the present invention can be purchased commercially or prepared using existing equipment.

[0028] In this invention, unless otherwise stated, directional terms such as "upper" and "lower" specifically refer to the orientation of the figures in the accompanying drawings. Furthermore, in this invention, the terms "comprising," "including," etc., mean "including but not limited to." In this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this invention, "and / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone. A and B can be singular or plural. In this invention, "at least one" means one or more, and "more" means two or more. "At least one," "at least one of the following," or similar expressions refer to any combination of these items, including any combination of a single item or a plural item. For example, "at least one of a, b, or c" or "at least one of a, b, and c" can both mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be a single or multiple.

[0029] like Figures 1-5 As shown, a helium-3 adsorption carbon bag for helium-3 insertion includes a carbon bag shell 4. An upper helium-3 adsorption carbon bag tube 1 and a lower helium-3 adsorption carbon bag tube 8 are respectively connected to the upper and lower sides of the carbon bag shell 4. Activated carbon is placed inside the carbon bag shell 4. An upper carbon bag flange 2 and a lower carbon bag flange 7 are respectively fixedly installed on the upper and lower sides of the carbon bag shell 4. A first threaded hole 13 and a second threaded hole 18 are respectively opened on the opposite sides of the upper carbon bag flange 2 and the lower carbon bag flange 7. A mesh sheet 3 and a lower mesh sheet 6 are respectively fixedly installed on the opposite sides of the upper carbon bag flange 2 and the lower carbon bag flange 7. Both the mesh sheet 3 and the lower mesh sheet 6 have through holes corresponding to the first threaded hole 13 and the second threaded hole 18 respectively. An opening is respectively located at the center of the upper carbon bag flange 2 and the lower carbon bag flange 7. The carbon bag has a first through hole 14 and a second through hole 17. The upper tube 1 of the helium-3 adsorption carbon bag extends into the first through hole 14 and is fixedly connected to its inner wall. The lower tube 8 of the helium-3 adsorption carbon bag extends into the second through hole 17 and is fixedly connected to its inner wall. The top of the lower flange 7 of the carbon bag and both sides of the second through hole 17 are provided with heat-conducting column welding grooves 16. Heat-conducting columns 5 passing through the lower mesh 6 are fixedly installed inside the heat-conducting column welding grooves 16. Two insulating terminals 9 extending to the top of the upper flange 2 of the carbon bag are fixedly installed inside the upper flange 2 of the carbon bag. Enamelled wire heating wire 19 is wound around the outside of one side of the heat-conducting column 5 and around the outside of the other side of the heat-conducting column 5. A wire passing through the insulating terminal 9 and fixedly connected to it is provided above the upper flange 2 of the carbon bag. The two ends of the heating wire 19 are fixedly connected to the wire respectively.

[0030] like Figures 1-3As shown: The outer side of the charcoal bag shell 4 is provided with fins 10.

[0031] Specifically: Increase the heat exchange area on the outer side of the carbon bag shell 4 to achieve a better heat exchange effect.

[0032] like Figures 1-5 As shown: the outer shell of the carbon bag 4, the upper flange of the carbon bag 2, the lower flange of the carbon bag 7, and the heat-conducting column 5 are all made of oxygen-free copper.

[0033] Specifically: Oxygen-free copper has good thermal conductivity, which can further improve the effect of rapid heating and cooling.

[0034] like Figures 1-5 As shown: Both the upper mesh 3 and the lower mesh 6 are made of stainless steel.

[0035] like Figures 1-5 As shown: the upper flange 2 and the lower flange 7 of the carbon bag are both welded to the inner wall of the carbon bag shell 4. The upper tube 1 of the helium-3 adsorption carbon bag is fixed to the upper flange 2 of the carbon bag by welding. The lower tube 8 of the helium-3 adsorption carbon bag and the heat-conducting column 5 are both fixedly connected to the lower flange 7 of the carbon bag by welding.

[0036] like Figures 1-5 As shown: The upper flange 2 and the lower flange 7 of the carbon bag are respectively provided with a first auxiliary threaded hole 12 and a second auxiliary threaded hole 11 on opposite sides.

[0037] Specifically, it allows users to easily expand its application to include fixing thermometers, heat sinks, or other components.

[0038] Operating principle: The upper tube 1 and lower tube 8 of the helium-3 adsorption carbon pack on the outer shell 4 are connected to the helium-3 working fluid circulation pipeline. Gas containing helium-3 working fluid enters the interior of the outer shell 4 and is adsorbed by the activated carbon. When the outer shell 4 is heated, the heating wire 19 heats the activated carbon located in the middle of the interior of the outer shell 4. At the same time, the heat from the heating wire 19 to the heat-conducting column 5 is transferred to the outer shell 4. The outer shell 4 can heat the activated carbon located on its inner wall, so that both the middle and the inner wall of the outer shell 4 are heat sources, improving the heating effect. When the outer shell 4 is provided with fins 10, the heat exchange area on the outside of the outer shell 4 can be increased, thereby achieving a better heat exchange effect.

[0039] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined in this invention may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed in this invention.

Claims

1. A helium-3 adsorption carbon bag for helium-3 insertion, comprising a carbon bag shell (4), wherein an upper tube (1) and a lower tube (8) of the helium-3 adsorption carbon bag are respectively connected to the upper and lower sides of the carbon bag shell (4), and activated carbon is disposed inside the carbon bag shell (4), characterized in that: The upper flange (2) and lower flange (7) of the carbon bag are fixedly installed on the upper and lower sides of the outer shell (4) of the carbon bag, respectively. The upper flange (2) and the lower flange (7) of the carbon bag are respectively provided with a first threaded hole (13) and a second threaded hole (18) on the opposite side. The upper flange (2) and the lower flange (7) of the carbon bag are respectively fixedly installed with a mesh sheet (3) and a lower mesh sheet (6). The mesh sheet (3) and the lower mesh sheet (6) are respectively provided with through holes corresponding to the first threaded hole (13) and the second threaded hole (18) inside. The upper flange (2) and the lower flange (7) of the carbon bag are respectively provided with a first through hole (14) and a second through hole (17) at the center of the inner side. The upper tube (1) of the helium-3 adsorption carbon bag extends into the first through hole (14). The lower tube (8) of the helium-3 adsorption carbon bag extends into the second through hole (17) and is fixedly connected to its inner wall. The top of the lower flange (7) of the carbon bag and both sides of the second through hole (17) are provided with heat-conducting column welding grooves (16). The heat-conducting column (5) passing through the lower mesh (6) is fixedly installed inside the heat-conducting column welding groove (16). Two insulating terminals (9) extending to the top of the upper flange (2) of the carbon bag are fixedly installed inside. The outer side of the heat-conducting column (5) on one side is wrapped with an enameled wire heating wire (19) that is wrapped with the outer side of the heat-conducting column (5) on the other side. A wire passing through the insulating terminal (9) and fixedly connected to it is provided above the upper flange (2) of the carbon bag. The two ends of the heating wire (19) are fixedly connected to the wire respectively.

2. The helium-3 adsorption carbon bag for helium-3 inserts according to claim 1, characterized in that: The outer shell (4) of the charcoal bag is provided with fins (10) on the outside.

3. A helium-3 adsorption carbon bag for a helium-3 plug-in according to claim 1 or 2, characterized in that: The outer shell (4), upper flange (2), lower flange (7), and heat-conducting column (5) of the carbon bag are all made of oxygen-free copper.

4. A helium-3 adsorption carbon bag for a helium-3 plug-in according to claim 3, characterized in that: Both the upper mesh (3) and the lower mesh (6) are made of stainless steel.

5. A helium-3 adsorption carbon bag for a helium-3 plug-in according to claim 4, characterized in that: The upper flange (2) and lower flange (7) of the carbon bag are both welded to the inner wall of the carbon bag shell (4). The upper tube (1) of the helium-3 adsorption carbon bag is fixed to the upper flange (2) of the carbon bag by welding. The lower tube (8) of the helium-3 adsorption carbon bag and the heat-conducting column (5) are both fixedly connected to the lower flange (7) of the carbon bag by welding.

6. A helium-3 adsorption carbon bag for a helium-3 plug-in according to claim 5, characterized in that: The upper flange (2) of the carbon bag and the lower flange (7) of the carbon bag are respectively provided with a first auxiliary threaded hole (12) and a second auxiliary threaded hole (11) on opposite sides.

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