Temperature control device and adsorption instrument

Abstract

The utility model relates to the technical field of adsorption instruments, particularly provides a temperature control device and an adsorption instrument, and aims to solve the problem that the conventional adsorption instrument can only test at a single temperature. In order to achieve the purpose, according to the temperature control device, a refrigerant is contained in a first Dewar flask, a heat conduction block is arranged in a second Dewar flask stretching into the first Dewar flask, and the heat conduction block is provided with a containing groove for containing a sample tube and integrates a heating piece and a refrigerating piece; wherein the refrigerating part allows a refrigerant of the first Dewar flask to flow in, so that the refrigerating part can cooperate with the heating part to adjust the temperature of the heat conduction block, thereby greatly expanding the test temperature zone, realizing the test of a sample at different temperatures, breaking through the limitation that a traditional adsorption instrument can only test at a single fixed low temperature, and obviously widening the temperature application range; and the test requirement of the sample under the variable temperature condition is met. In addition, the refrigerant is contained in the space formed by the first Dewar flask and the second Dewar flask, the heat preservation effect of the refrigerant can be improved, and loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of analyzers, specifically providing a temperature control device and an adsorption instrument. Background Technology

[0002] Adsorption analyzers operate based on the static volumetric method, measuring the amount of gas adsorbed by the material by monitoring and controlling changes in gas pressure before and after the adsorption process. This allows for the analysis of parameters such as the material's specific surface area, pore size, and pore volume. Because the adsorption forces are relatively weak, the testing process typically requires cryogenic conditions to overcome the influence of molecular thermal motion. Currently, liquid nitrogen is commonly used as a refrigerant to achieve the required low temperatures. However, liquid nitrogen only provides a single test temperature (77.4 K), and this inability to adjust the temperature significantly limits the flexibility of the test and further restricts the application expansion of adsorption analyzers.

[0003] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0004] To address at least one problem in the prior art, namely, the limitation of existing adsorption instruments to testing only at a single temperature, this application provides a temperature control device comprising:

[0005] The first Dewar flask contains refrigerant;

[0006] A temperature control mechanism, comprising a second Dewar flask, a cap, and a temperature control assembly, wherein the cap covers the opening of the first Dewar flask, and the second Dewar flask is disposed on the side of the cap facing the first Dewar flask and extends into the first Dewar flask; and

[0007] The temperature control component includes a heat-conducting block, a cooling element, and a heating element. The heat-conducting block is disposed inside the second Dewar flask and has a receiving groove for accommodating the sample tube on the side facing the cap. The heat-conducting block is provided with a cooling element and a heating element. The cooling element is configured to allow the refrigerant in the first Dewar flask to flow into it and cooperates with the heating element to adjust the test temperature of the sample in the sample tube.

[0008] In the preferred embodiment of the above temperature control device, the refrigeration component includes a first connecting pipe and a second connecting pipe, wherein a first end of the first connecting pipe extends below the refrigerant liquid level, and a first end of the second connecting pipe extends outside the first Dewar flask; and

[0009] The cooling component further includes a first coil wound around the heat-conducting block, one end of the first coil being connected to the second end of the first connecting pipe, and the other end being connected to the second end of the second connecting pipe; or

[0010] The cooling component further includes a cooling plate sleeved outside the heat-conducting block, the inlet of which is connected to the second end of the first connecting pipe, and the outlet of which is connected to the second end of the second connecting pipe; or

[0011] The cooling component further includes a first flow channel formed on the heat-conducting block, one end of the first flow channel being connected to the second end of the first connecting pipe, and the other end being connected to the second end of the second connecting pipe.

[0012] In the preferred embodiment of the above-mentioned temperature control device, the temperature control device further includes a pressure regulating component, which is configured to connect with the area between the first Dewar flask and the second Dewar flask to increase or decrease the pressure in the space formed by the first Dewar flask and the second Dewar flask, and to cause the refrigerant in the space to flow into the cooling component when the pressure increases.

[0013] In the preferred embodiment of the above temperature control device, the pressure regulating component includes a pressure boosting component; and

[0014] The pressurizing component includes a third connecting pipe and a pressurizing gas source. One end of the third connecting pipe extends into the first Dewar flask, and the other end is connected to the pressurizing gas source.

[0015] In the preferred embodiment of the above temperature control device, the pressurizing component further includes a second coil, which is wound around the heat-conducting block, and its two ends are respectively connected to the third connecting pipe and the pressurizing gas source; or

[0016] The pressurizing component also includes a second flow channel formed on the heat-conducting block, with both ends of the second flow channel connected to the third connecting pipe and the pressurizing gas source, respectively.

[0017] In the preferred embodiment of the above temperature control device, the pressure regulating component includes a pressure relief component, which is disposed in the area between the first Dewar flask and the second Dewar flask of the cover body.

[0018] In the preferred embodiment of the above temperature control device, the temperature control component further includes a temperature measuring element, which is disposed within the heat-conducting block.

[0019] In the preferred embodiment of the above temperature control device, the cover is provided with a refrigerant inlet in the area between the first Dewar flask and the second Dewar flask, and the refrigerant inlet is provided with a sealing cap.

[0020] In the preferred embodiment of the above temperature control device, an installation port is provided on the cover at a position corresponding to the receiving groove.

[0021] In the preferred embodiment of the above temperature control device, the mounting port is provided with a heat-insulating cover, and the heat-insulating cover is provided with a through hole for the neck of the sample tube to pass through, so that when the bottom of the sample tube is located in the mounting groove, the neck of the sample tube can extend out from the through hole; or

[0022] An elastic insulation sheet is provided at the installation port, and at least one through-slit is provided on the elastic insulation sheet.

[0023] In the preferred embodiment of the above-mentioned temperature control device, the temperature control mechanism further includes a heat insulation component, which is disposed on the side of the heat conductor near the cover and surrounds the receiving groove.

[0024] In the preferred embodiment of the above temperature control device, the temperature control component further includes a third outer cylinder disposed inside the second Dewar flask, and the third outer cylinder is provided with the heat-conducting block, the cooling element and the heating element.

[0025] In the preferred embodiment of the above temperature control device, the temperature control component further includes a first support member, which is disposed at the bottom of the second Dewar flask and has its other end in contact with the third outer cylinder.

[0026] In the preferred embodiment of the above temperature control device, the first Dewar flask includes a first outer cylinder and a first inner liner disposed inside the first outer cylinder. The first inner liner is used to hold the refrigerant and contains the second Dewar flask.

[0027] In a preferred embodiment of the above-mentioned temperature control device, the first Dewar flask further includes a top cover, which covers the area between the first outer cylinder and the first inner liner; and / or

[0028] The first Dewar flask also includes a second support member, which is disposed at the bottom of the first outer cylinder and its other end contacts the first inner liner.

[0029] In the preferred embodiment of the above temperature control device, the second Dewar flask includes a second outer cylinder and a second inner liner disposed inside the second outer cylinder. The second outer cylinder is disposed on the cap and extends into the first Dewar flask, and the heat-conducting component is disposed in the second inner liner.

[0030] In the preferred embodiment of the temperature control device described above, the second Dewar flask further includes a third support member, which is disposed at the bottom of the second outer cylinder and its other end contacts the second inner liner.

[0031] In the preferred technical solution of the above temperature control device, the inner liner is a double-layered inner liner, and the interlayer space is a vacuum environment.

[0032] This application also provides an adsorption apparatus, which includes the temperature control device described in any of the above preferred technical solutions.

[0033] Those skilled in the art will understand that the temperature control device of this application, by placing refrigerant in a first Dewar flask and placing a heat-conducting block inside a second Dewar flask extending therein, integrates a heating element and a cooling element, with a receiving groove for accommodating the sample tube. The cooling element allows refrigerant from the first Dewar flask to flow in, enabling it to work in conjunction with the heating element to adjust the temperature of the heat-conducting block, thereby significantly expanding the testing temperature range and enabling sample testing at different temperatures. This overcomes the limitation of traditional adsorption instruments, which can only perform tests at a single fixed low temperature, significantly broadening the applicable temperature range and meeting the testing needs of samples under varying temperature conditions. Furthermore, by placing the refrigerant within the space formed by the first and second Dewar flasks, the refrigerant's heat preservation effect can be improved, reducing consumption.

[0034] Furthermore, the refrigerant in the first Dewar flask can flow into the first coil, the cooling plate, or the first flow channel through the first connecting pipe. The refrigerant in the first coil, the cooling plate, or the first flow channel can exchange heat with the heat-conducting block, thereby enabling the aforementioned cooling components to work with the heating components to adjust the temperature of the heat-conducting block and meet the testing requirements of the sample under different temperature conditions.

[0035] Furthermore, by setting a pressure regulating component, it is beneficial to adjust the pressure of the space formed by the first Dewar flask and the second Dewar flask, so that when the pressure in this space increases, the refrigerant can flow into the cooling component to adjust the test temperature of the sample.

[0036] Furthermore, by introducing a gas source into the space formed by the first and second Dewar flasks when the pressure is low, the pressure in the space can be increased, allowing the refrigerant in the first Dewar flask to flow into the cooling element, thereby adjusting the test temperature of the sample.

[0037] Furthermore, by placing the pressure relief component in the area between the first and second Dewar bottles, when the pressure in the space formed by the first and second Dewar bottles is too high, the overpressure gas can be discharged from the pressure relief valve, thus preventing excessive refrigerant from flowing into the cooling coil due to excessive space pressure and avoiding unnecessary refrigerant loss.

[0038] Furthermore, by providing a refrigerant filling port in the area between the first and second Dewar flasks, it is convenient to add refrigerant to the first Dewar flask, ensuring the normal operation of the temperature control device.

[0039] Furthermore, by setting an installation port on the cover at a position corresponding to the receiving groove, and setting an insulation cover or elastic insulation sheet at the installation port, external heat interference can be effectively avoided on the one hand, and the installation of sample tubes can be facilitated on the other hand.

[0040] Furthermore, by setting the first inner liner to a double-layered structure and setting the interlayer space to a vacuum, heat conduction and evaporation loss can be effectively reduced. In addition, by setting the second inner liner to a double-layered structure and setting the interlayer space to a vacuum, external thermal interference can be effectively isolated, ensuring that the sample maintains a stable temperature environment during the adsorption test. This significantly reduces the interference of temperature fluctuations on the adsorption test results and improves the accuracy and reliability of the test data. Attached Figure Description

[0041] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0042] Figure 1 This is a cross-sectional view of the control device of this application;

[0043] Figure 2 This is a cross-sectional view of the temperature control device of this application from another angle;

[0044] Figure 3 This is a cross-sectional view of the first Dewar flask of this application;

[0045] Figure 4 This is a cross-sectional view of the temperature control mechanism in this application.

[0046] List of reference numerals in the attached diagram:

[0047] 1. First Dewar flask; 11. First outer cylinder; 12. Second inner liner; 13. Top cover; 14. Second support component; 15. Buffer component; 2. Temperature control mechanism; 21. Second Dewar flask; 211. Second outer cylinder; 212. Second inner liner; 213. Third support component; 22. Cover body; 231. Heat-conducting block; 2311. Receiving groove; 232. First coil; 233. First connecting pipe; 234. Second connecting pipe; 235. Third outer cylinder; 24. Sealing cap; 25. Insulation cap; 251. Through hole; 26. Heat insulation component; 27. First support component; 28. Heating rod; 3. Pressure boosting component; 31. Second coil; 32. Third connecting pipe; 4. Pressure relief component; 5. Sample tube. Detailed Implementation

[0048] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. It should be noted that in the description of this application, terms such as "upper," "lower," "inner," "bottom," and "end," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation of this application.

[0049] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "set up," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] Combination Figure 1-4 The control device of this application will be described.

[0051] See Figure 1-4 The temperature control device includes a first Dewar flask 1, a temperature control mechanism 2, and a pressure regulating component. The first Dewar flask 1 includes a first outer cylinder 11, a first inner liner 12, a top cover 13, a second support member 14, and a buffer member 15. The first inner liner 12 is disposed inside the first outer cylinder 11 and contains a refrigerant, specifically liquid nitrogen. The top cover 13 covers the area between the first outer cylinder 11 and the first inner liner 12. The first support member 27 is a support ring disposed at the bottom of the first outer cylinder 11, with its end away from the bottom of the first outer cylinder 11 contacting the first inner liner 12 to support it. The outer wall of the first inner liner 12 has a support ring along its height direction (e.g.,...). Figure 1 Two buffer elements 15 are provided at intervals in the vertical direction shown. These two buffer elements 15 are annular buffer elements 15, and their material is foam cotton. The outer walls of these two annular foam cotton are in contact with the first outer cylinder 11 and are used to fix the first inner liner 12.

[0052] In the exemplary embodiments, this application does not limit the materials of the first inner liner 12 and the annular buffer 15, as long as they can provide insulation for the refrigerant. For example, the first inner liner 12 may be made of high borosilicate glass; and / or the annular buffer 15 may be made of EVA.

[0053] In the exemplary embodiments, this application does not limit the refrigerant, as long as it can perform a refrigeration function. For example, the refrigerant can also be liquid argon, etc.

[0054] In the exemplary embodiments, the arrangement of the second support member 14 is not fixed and can be adjusted by those skilled in the art as needed. For example, the second support member 14 may be at least one support rod, with one end of the support rod disposed at the bottom of the first outer cylinder 11 and the other end in contact with the first inner liner 12, thereby providing support for the first inner liner 12. Furthermore, the arrangement of the second support member 14 is not mandatory in this application, and those skilled in the art may select it as needed.

[0055] In the exemplary embodiments, the arrangement of the buffer 15 is not fixed and can be adjusted by those skilled in the art as needed. For example, the buffer 15 may include multiple buffer blocks, which are spaced apart along the circumferential direction of the first inner liner 12 to fix the first inner liner 12. Furthermore, the arrangement of the buffer 15 is not mandatory in this application and can be selected by those skilled in the art as needed.

[0056] See next Figure 1-2 4. The temperature control mechanism 2 includes a second Dewar flask 21, a cap 22, and a temperature control component. The cap 22 covers the mouth of the first Dewar flask 1. The second Dewar flask 21 includes a second outer cylinder 211, a second inner liner 212, and a third support member 213. The second outer cylinder 211 is located on the side of the cap 22 facing the first Dewar flask 1 and extends into the first inner liner 12. The second inner liner 212 is located inside the second outer cylinder 211, and the temperature control component is located inside it. The third support member 213 is a gasket located at the bottom of the second outer cylinder 211. The side of the gasket away from the bottom of the second outer cylinder 211 contacts the second inner liner 212 to support the second inner liner 212 and ensure that the top of the second inner liner 212 is in close contact with the cap 22.

[0057] In the exemplary embodiments, the configuration of the third support member 213 is not fixed and can be adjusted as needed by those skilled in the art. For example, the third support member 213 can also be a support ring or a support rod, with one end of the support ring or support rod disposed at the bottom of the second outer cylinder 211 and the other end in contact with the second inner liner 212, thereby providing support for the second inner liner 212. Furthermore, the configuration of the third support member 213 is not mandatory in this application, and those skilled in the art can select it as needed.

[0058] In the exemplary embodiment, the material of the third support member 213 in this application is not limited, as long as it can provide support for the second inner liner 212. For example, the material of the gasket can be EVA.

[0059] See next Figure 1-4Both the first inner liner 12 and the second inner liner 212 are double-layered. The first inner liner 12 includes a first outer inner liner and a first inner inner liner disposed within the first outer inner liner. The first outer inner liner and the first inner inner liner are connected, creating a vacuum in the space between them. The second inner liner 212 includes a second outer inner liner and a second inner inner liner disposed within the second outer inner liner. The second outer inner liner and the second inner inner liner are connected, creating a vacuum in the space between them. This arrangement, with both the first inner liner 12 and the second inner liner 212 being double-layered and the space between them set to a vacuum, effectively isolates external thermal interference, reduces heat conduction, minimizes liquid nitrogen evaporation loss, and ensures a stable temperature environment for the sample during adsorption testing. This reduces the interference of temperature fluctuations on the adsorption test results, improving the accuracy and reliability of the test data.

[0060] It should be noted that the "inner liner" mentioned in this application refers to the inner inner liner, and the interlayer space between the inner and outer inner liners is kept vacuum and without any other components.

[0061] See next Figure 1 , 2 4. The temperature control assembly includes a heat-conducting block 231, a cooling component, a heating component, a temperature measuring component, a third outer cylinder 235, and a first support component 27. Both the third outer cylinder 235 and the first support component 27 are disposed within the second inner liner 212. The first support component 27 is a support rod, with one end positioned at the bottom of the second inner liner 212 and the other end contacting the third outer cylinder 235, used to support the third outer cylinder 235. The heat-conducting block 231 is disposed within the third outer cylinder 235, and a receiving groove 2311 is provided on its side facing the cover 22. This receiving groove 2311 is used to receive the sample tube 5 containing the sample. The heat-conducting block 231 contains a heating component and a temperature measuring component. The heating component is a heating rod 28, which heats the heat-conducting block 231, thereby facilitating the adjustment of the sample's test temperature. The temperature measuring component is used to detect the temperature of the heat-conducting block 231, thereby ensuring that the sample's test temperature reaches the target temperature.

[0062] In the exemplary embodiments, the specific configuration of the first support member 27 is not fixed and can be adjusted by those skilled in the art as needed. For example, the first support member 27 can also be a support ring for supporting the third outer cylinder 235. Furthermore, in other preferred embodiments, the configuration of the first support member 27 is not mandatory and can be selected by those skilled in the art as needed.

[0063] In the exemplary embodiments, the location and form of the heating element are not fixed and can be adjusted by those skilled in the art as needed. For example, the heating element can be a heating wire, and / or the heating element can also be disposed on the outer wall of the heat-conducting block 231.

[0064] In the exemplary embodiments, the placement of the temperature measuring element is not fixed and can be adjusted by those skilled in the art according to specific application scenarios. For example, the temperature measuring element can also be placed in a receiving groove. Furthermore, this application does not limit the specific type of temperature measuring element, as long as it can test the temperature of the heat-conducting block 231, such as a temperature sensor.

[0065] See next Figure 2 and 4 The cooling component includes a first connecting pipe 233, a second connecting pipe 234, and a first coil 232. The first coil 232 is wound around the heat-conducting block 231. The first end of the first connecting pipe 233 extends below the liquid nitrogen surface, and the second end passes through the cap 22 and connects to the inlet end of the first coil 232. The first end of the second connecting pipe 234 extends outside the first Dewar flask 1, and the second end passes through the cap 22 and connects to the outlet end of the first coil 232, allowing liquid nitrogen to flow into the first coil 232 through the first connecting pipe 233. The first coil 232 exchanges heat with the heat-conducting block 231, thereby increasing the temperature of the heat-conducting block 231 and facilitating the adjustment of the sample testing temperature. The liquid nitrogen that exchanges heat with the heat-conducting block 231 vaporizes due to the increased temperature, forming nitrogen gas, which is discharged from the second connecting pipe 234.

[0066] It should be noted that although the first Dewar flask 1 and the second Dewar flask 21 can keep the liquid nitrogen at a constant temperature, the liquid nitrogen will inevitably evaporate. The evaporation of liquid nitrogen into gas will increase the pressure in the containment space formed by the first Dewar flask 1 and the second Dewar flask 21. When the pressure in the containment space exceeds atmospheric pressure, the liquid nitrogen flows into the first coil 232 through the first connecting pipe 233 and exchanges heat with the heat-conducting block 231. This process lowers the temperature of the heat-conducting block 231, thereby cooling the sample. The liquid nitrogen absorbs heat and vaporizes, forming nitrogen gas, which is then discharged from the second connecting pipe 234.

[0067] In the exemplary embodiments, the specific configuration of the refrigeration component is not fixed and can be adjusted by those skilled in the art according to specific application scenarios. For example, the refrigeration component includes a first connecting pipe 233, a second connecting pipe 234, and a refrigeration chip. The refrigeration chip is sleeved outside the heat-conducting block 231. The first end of the first connecting pipe 233 extends below the liquid nitrogen surface, and the second end passes through the cover 22 and connects to the inlet end of the refrigeration chip. The first end of the second connecting pipe 234 extends outside the first Dewar flask 1, and the second end passes through the cover 22 and connects to the outlet end of the refrigeration chip. Alternatively, the refrigeration component includes a first connecting pipe 233, a second connecting pipe 234, and a first flow channel formed on the heat-conducting block 231. The first end of the first connecting pipe 233 extends below the liquid nitrogen surface, and the second end passes through the cover 22 and connects to the inlet end of the first flow channel. The first end of the second connecting pipe 234 extends outside the first Dewar flask 1, and the second end passes through the cover 22 and connects to the outlet end of the first flow channel. This also allows liquid nitrogen to flow into the refrigeration component through the first connecting pipe 233. The refrigeration component exchanges heat with the heat-conducting block 231, and the liquid nitrogen that exchanges heat with the heat-conducting block 231 vaporizes due to the temperature increase to form nitrogen gas, which is discharged from the second connecting pipe 234.

[0068] See next Figure 1-2 4. The pressure regulating component includes a pressure boosting component 3 and a pressure relieving component 4. The pressure boosting component 3 increases the pressure in the accommodating space, and the pressure relieving component 4 reduces the pressure in the accommodating space, thereby facilitating the adjustment of the pressure in the space formed by the first Dewar flask 1 and the second Dewar flask 21. The pressure boosting component 3 includes a third connecting pipe 32, a pressurizing gas source, and a second coil 31. The second coil 31 is wound around the heat-conducting block 231. One end of the third connecting pipe 32 extends into the first Dewar flask 1, and the other end passes through the cap 22 and connects to the inlet end of the second coil 31. The pressurizing gas source is a nitrogen gas source. One end of the pressurizing gas source pipe extends into the first Dewar flask 1, and the other end passes through the cap 22 and connects to the outlet end of the second coil 31. By using the pressurizing component 3, when the self-pressurization of the containment space is insufficient to push liquid nitrogen into the first coil 232 to adjust the sample's test temperature, nitrogen gas can be injected into the containment space through the pressurizing gas source to increase the pressure of the containment space. When the pressure of the containment space is greater than atmospheric pressure, liquid nitrogen can flow into the first coil 232 through the first connecting pipe 233 and exchange heat with the heat-conducting block 231, thereby achieving the purpose of adjusting the sample's test temperature. During this process, the vaporized liquid nitrogen is converted into nitrogen gas and discharged through the second connecting pipe 234.

[0069] It should be noted that self-increasing pressure refers to increasing the pressure of the containment space solely through the evaporation and vaporization of liquid nitrogen without the need for an external gas source. It should also be noted that the third connecting pipe 32 extends into the first Dewar flask 1 at one end, above the liquid nitrogen level.

[0070] In the exemplary embodiments, the configuration of the pressurizing component 3 is not fixed and can be adjusted as needed by those skilled in the art. For example, the pressurizing component may also include a third connecting pipe 32, a pressurizing gas source, and a second flow channel formed on the heat-conducting block 231. One end of the third connecting pipe 32 extends into the first Dewar flask 1, and the other end passes through the cover 22 and connects to the inlet end of the second flow channel. The pressurizing gas source is a nitrogen gas source. One end of the pressurizing gas source pipe extends outside the first Dewar flask 1, and the other end passes through the cover 22 and connects to the outlet end of the second flow channel, which also helps to increase the pressure of the accommodating space, thereby allowing liquid nitrogen to enter the first coil 232.

[0071] In the exemplary embodiments, the type of gas source in the pressurization gas source is not fixed in this application, and those skilled in the art can adjust it as needed. For example, argon gas, etc.

[0072] In the exemplary embodiment, the second coil 31 is not mandatory, and those skilled in the art can choose to install it as needed. In the absence of the second coil 31, one end of the third connecting pipe 32 passes through the cap 22 in the area between the first Dewar flask 1 and the second Dewar flask 21 and extends into the first Dewar flask 1, while the other end is connected to a pressurized air source.

[0073] See next Figure 1-2 4. The cover 22 is provided with a pressure relief port and a refrigerant charging port in the area between the first Dewar flask 1 and the second Dewar flask 21. The pressure relief port is equipped with a pressure relief component 4, which can discharge overpressure gas from the pressure relief valve when the pressure in the containment space formed by the first Dewar flask 1 and the second Dewar flask 21 is too high, thereby reducing the pressure in the containment space and preventing excessive liquid nitrogen from flowing into the cooling coil due to excessive pressure, thus avoiding unnecessary liquid nitrogen loss. When the pressure in the containment space drops to the threshold, the pressure relief component 4 stops venting. The refrigerant charging port is equipped with a sealing cap 24, which is used to seal the containment space to avoid unnecessary liquid nitrogen loss. When the liquid nitrogen in the containment space gradually decreases due to natural evaporation or discharge through the first connecting pipe 233, the first coil 232 and the second connecting pipe 234, the sealing cap 24 needs to be removed to replenish liquid nitrogen to maintain the refrigerant level required for the normal operation of the temperature control device. After replenishing the liquid nitrogen, the charging port needs to be sealed with the sealing cap 24 in a timely manner.

[0074] It should be noted that when the pressure in the containment space reaches a threshold value, this threshold is manually set to ensure that liquid nitrogen flows into the first coil 232. Furthermore, the refrigerant inlet located inside the cover 22 is surrounded by an insulation layer, which reduces heat transfer efficiency, thereby minimizing liquid nitrogen evaporation loss during replenishment.

[0075] In the exemplary embodiments, this application does not limit the specific type of the pressure relief component 4, as long as it can perform the function of pressure relief. For example, the pressure relief component 4 can be a pressure relief valve.

[0076] See next Figure 1-2 4. An installation port is provided on the cover 22 at a position corresponding to the receiving groove. An insulation cover 25 is provided on the installation port, and a through hole 251 is provided on the insulation cover 25 for the neck of the sample tube 5 to pass through. This allows the neck of the sample tube 5 to extend out through the through hole 251 when the bottom of the sample tube 5 is in the installation groove, thereby ensuring the installation of the sample tube 5 and effectively isolating external thermal interference, ensuring the accuracy of the test data. The temperature control mechanism 2 also includes a heat insulation component 26, which is located on the side of the heat conductor near the cover 22 and surrounds the receiving groove. On the one hand, it can effectively avoid external thermal interference, and on the other hand, it can facilitate the installation of the sample tube 5.

[0077] In the exemplary embodiment, the insulation cover 25 is not mandatory, and those skilled in the art can choose to include it as needed. Without the insulation cover 25, a heat insulation sheet is provided at the mounting opening. This heat insulation sheet is an elastic heat insulation sheet with at least one through-slit, dividing the heat insulation sheet into at least two petal-shaped structures. When installing the sample tube 5, the bottom of the sample tube 5 is directly inserted through the through-slit into the receiving groove. The petals are compressed and unfolded, forming effective heat insulation against the outer wall of the sample tube 5 neck. After the sample tube 5 is removed, the elastic heat insulation sheet automatically returns to its original shape.

[0078] In addition, this application also provides an adsorption apparatus, which includes the temperature control device described in any of the above embodiments.

[0079] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0080] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A temperature control device, characterized in that, The temperature control device includes: The first Dewar flask (1) contains a refrigerant; Temperature control mechanism (2), the temperature control mechanism (2) includes a second Dewar flask (21), a cover (22) and a temperature control component, the cover (22) is placed over the mouth of the first Dewar flask (1), the second Dewar flask (21) is disposed on the side of the cover (22) facing the first Dewar flask (1) and extends into the first Dewar flask (1); and The temperature control component includes a heat-conducting block (231), a cooling element, and a heating element. The heat-conducting block (231) is disposed inside the second Dewar flask (21) and has a receiving groove (2311) for accommodating the sample tube (5) on the side facing the cap (22). The heat-conducting block (231) is provided with a cooling element and a heating element. The cooling element is configured to allow the refrigerant in the first Dewar flask (1) to flow into it and cooperate with the heating element to adjust the test temperature of the sample in the sample tube (5).

2. The temperature control device according to claim 1, characterized in that, The refrigeration component includes a first connecting pipe (233) and a second connecting pipe (234), wherein a first end of the first connecting pipe (233) extends below the refrigerant liquid level, and a first end of the second connecting pipe (234) extends outside the first Dewar flask (1); and The cooling component further includes a first coil (232) wound around the heat-conducting block (231), one end of the first coil (232) being connected to the second end of the first connecting pipe (233), and the other end being connected to the second end of the second connecting pipe (234); or The cooling component further includes a cooling plate sleeved outside the heat-conducting block (231), the inlet of which is connected to the second end of the first connecting pipe (233), and the outlet of which is connected to the second end of the second connecting pipe (234); or The cooling component further includes a first flow channel formed on the heat-conducting block (231), one end of the first flow channel being connected to the second end of the first connecting pipe (233), and the other end being connected to the second end of the second connecting pipe (234).

3. The temperature control device according to claim 1, characterized in that, The temperature control device also includes a pressure regulating element, which is configured to connect to the area between the first Dewar flask (1) and the second Dewar flask (21) to increase or decrease the pressure of the space formed by the first Dewar flask (1) and the second Dewar flask (21), and to cause the refrigerant in the space to flow into the cooling element when the pressure increases.

4. The temperature control device according to claim 3, characterized in that, The pressure regulating component includes a pressure boosting component (3); and The pressurizing component (3) includes a third connecting pipe (32) and a pressurizing gas source. One end of the third connecting pipe (32) extends into the first Dewar flask (1), and the other end is connected to the pressurizing gas source.

5. The temperature control device according to claim 4, characterized in that, The booster component (3) further includes a second coil (31), which is wound around the heat-conducting block (231), and its two ends are respectively connected to the third connecting pipe (32) and the booster gas source; or The pressurizing component (3) further includes a second flow channel formed on the heat-conducting block (231), and the two ends of the second flow channel are respectively connected to the third connecting pipe (32) and the pressurizing gas source.

6. The temperature control device according to claim 3, characterized in that, The pressure regulating component includes a pressure relief component (4), which is disposed in the area of ​​the cover (22) between the first Dewar bottle (1) and the second Dewar bottle (21).

7. The temperature control device according to claim 1, characterized in that, The temperature control component also includes a temperature measuring element, which is disposed within the heat-conducting block (231).

8. The temperature control device according to claim 1, characterized in that, The cover (22) has a refrigerant filling port in the area between the first Dewar bottle (1) and the second Dewar bottle (21), and the refrigerant filling port is provided with a sealing cap (24).

9. The temperature control device according to claim 1, characterized in that, An installation port is provided on the cover (22) at a position corresponding to the receiving groove (2311).

10. The temperature control device according to claim 9, characterized in that, The mounting port is provided with a heat-insulating cover (25), and the heat-insulating cover (25) is provided with a through hole (251) for the neck of the sample tube (5) to pass through, so that when the bottom of the sample tube (5) is located in the receiving groove (2311), the neck of the sample tube (5) can extend out from the through hole (251); or An elastic insulation sheet is provided at the installation port, and at least one through-slit is provided on the elastic insulation sheet.

11. The temperature control device according to claim 1, characterized in that, The temperature control mechanism (2) also includes a heat insulation component (26), which is disposed on the side of the heat-conducting block (231) near the cover (22) and surrounds the receiving groove (2311).

12. The temperature control device according to claim 1, characterized in that, The temperature control assembly also includes a third outer cylinder (235) disposed inside the second Dewar flask (21), and the third outer cylinder (235) is provided with the heat-conducting block (231), the cooling element and the heating element.

13. The temperature control device according to claim 12, characterized in that, The temperature control assembly also includes a first support member (27), which is disposed at the bottom of the second Dewar flask (21) and has its other end in contact with the third outer cylinder (235).

14. The temperature control device according to claim 1, characterized in that, The first Dewar flask (1) includes a first outer cylinder (11) and a first inner liner (12) disposed inside the first outer cylinder (11). The first inner liner (12) is used to hold the refrigerant and is provided with a second Dewar flask (21).

15. The temperature control device according to claim 14, characterized in that, The first Dewar flask (1) further includes a top cover (13) that covers the area between the first outer cylinder (11) and the first inner liner (12); and / or The first Dewar flask (1) also includes a second support (14), which is disposed at the bottom of the first outer cylinder (11) and its other end is in contact with the first inner liner (12).

16. The temperature control device according to claim 1, characterized in that, The second Dewar flask (21) includes a second outer cylinder (211) and a second inner liner (212) disposed inside the second outer cylinder (211). The second outer cylinder (211) is disposed on the cap (22) and extends into the first Dewar flask (1). The temperature control component is disposed in the second inner liner (212).

17. The temperature control device according to claim 16, characterized in that, The second Dewar flask (21) also includes a third support (213), which is disposed at the bottom of the second outer cylinder (211) and its other end is in contact with the second inner liner (212).

18. The temperature control device according to claim 14 or 16, characterized in that, The inner liner is double-layered, with a vacuum environment in the space between them.

19. An adsorption apparatus, characterized in that, The adsorption apparatus includes the temperature control device as described in any one of claims 1-18.

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