Zero-consumption liquid nitrogen tank

Abstract

The utility model discloses a zero-consumption liquid nitrogen tank which comprises a tank body, a circulating refrigeration mechanism is arranged on the tank body, liquid nitrogen is arranged in the tank body and can be vaporized in the tank body, the circulating refrigeration mechanism can circularly cool nitrogen and convert the nitrogen into the liquid nitrogen, the tank body can freeze a sample through the liquid nitrogen, and the interior of the tank body is sealed. The liquid nitrogen circulating device has the advantages that the tank body contains liquid nitrogen, the temperature in the tank rises, the liquid nitrogen is gasified, the circulating refrigerating mechanism can liquefy the nitrogen, liquid nitrogen circulation is achieved, one-time liquid adding and lifelong use are achieved, a large amount of liquid nitrogen is saved, cost is greatly reduced, and the liquid nitrogen circulating device is small in tank body size and convenient to use. Refrigeration and cooling are carried out through external temperature conduction, and the refrigerator can be applied to various use scenes, is convenient to take and use and can be recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of sample storage, in particular to a zero-consumption liquid nitrogen tank. Background Art

[0002] In the field of biological sample storage, low-temperature storage and access equipment is used to store biological samples such as blood samples, vaccines, bacterial and viral strains at low temperatures, so that the samples can be kept active in a low-temperature state.

[0003] Currently, the cooling device used is liquid nitrogen cooling, but each liquid nitrogen tank has a large daily demand for liquid nitrogen. The consumed liquid nitrogen vaporizes and escapes. The wasted liquid nitrogen cannot be recycled, which increases a lot of costs.

[0004] To this end, the inventor designed a zero-consumption liquid nitrogen tank. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] In view of the above problems or problems existing in the prior art, the present utility model is proposed.

[0007] Therefore, the purpose of the present invention is to provide a zero-consumption liquid nitrogen tank, which can ultra-low temperature freeze samples through the liquid nitrogen in the tank. As the liquid nitrogen evaporates into nitrogen gas, the nitrogen gas is converted into liquid nitrogen by a circulating refrigeration mechanism, so that liquid nitrogen can be recycled after only one addition, saving the cost of using liquid nitrogen.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: a zero-consumption liquid nitrogen tank, which includes a tank body, a circulating refrigeration mechanism is provided on the tank body, liquid nitrogen is provided inside the tank body, and the liquid nitrogen can be vaporized inside the tank body. The circulating refrigeration mechanism can circulate and cool the nitrogen and convert it into liquid nitrogen. The tank body can freeze the sample through the liquid nitrogen, and the interior of the tank body is sealed.

[0009] As a preferred solution of the zero-consumption liquid nitrogen tank of the utility model, the circulating refrigeration mechanism includes a cold finger component, which is arranged inside the tank body and at the upper end of the tank body. The cold finger component can liquefy nitrogen and seal the tank body.

[0010] As a preferred solution of the zero-consumption liquid nitrogen tank of the present invention, the cold finger component includes multiple groups of liquefied sheets, gaps are provided between the multiple groups of liquefied sheets, and the liquefied sheets are configured in a fin shape.

[0011] As a preferred solution of the zero-consumption liquid nitrogen tank of the present invention, the circulating refrigeration mechanism further includes a refrigerator, which is arranged at the upper end of the cold finger component and can cool the cold finger component.

[0012] As a preferred solution of the zero-consumption liquid nitrogen tank of the utility model, a nitrogen injection port is further provided on the tank body, and a plug is provided in the nitrogen injection port, which can seal the nitrogen injection port.

[0013] As a preferred solution of the zero-consumption liquid nitrogen tank of the utility model, liquid nitrogen can be injected into the tank body through the nitrogen injection port.

[0014] As a preferred solution of the zero-consumption liquid nitrogen tank of the utility model, it further includes a sealing protection member, which is arranged on the outside of the plug and can seal and protect the nitrogen injection port and the plug.

[0015] As a preferred solution of the zero-consumption liquid nitrogen tank of the utility model, the sealing protection component includes a protective cap and a sealing ring; a accommodating cavity is opened in the protective cap to accommodate the plug, and the protective cap is connected to the tank body through the sealing ring.

[0016] As a preferred solution of the zero-consumption liquid nitrogen tank of the utility model, a heat-insulating component is provided on the side of the upper end of the tank body, which can wrap the cold finger component and provide heat insulation protection for the cold finger component.

[0017] As a preferred solution of the zero-consumption liquid nitrogen tank of the utility model, the heat-insulating component is a heat-insulating layer of a certain thickness.

[0018] As a preferred solution of the zero-consumption liquid nitrogen tank of the present invention, the heat-insulating component is a heat-insulating layer of a certain thickness, and a heat-insulating cavity is opened inside.

[0019] As a preferred solution of the zero-consumption liquid nitrogen tank of the utility model, it further includes an extraction member, which is arranged in the heat-insulating component and can extract the gas inside the heat-insulating component.

[0020] As a preferred solution of the zero-consumption liquid nitrogen tank of the utility model, a quarter of the liquid nitrogen can be injected into the tank body.

[0021] The beneficial effects of the utility model are as follows: 1. The tank body is filled with liquid nitrogen, and the temperature inside the tank rises to gasify the liquid nitrogen. The circulating refrigeration mechanism can liquefy the nitrogen, thereby circulating the liquid nitrogen, thereby achieving one-time liquid addition and lifelong use, saving a large amount of liquid nitrogen and greatly reducing costs.

[0022] 2. The tank is small in size and cools down by conducting temperature to the outside. It can be applied to a variety of usage scenarios, is easy to take out, and can be recycled.

[0023] 3. Cold finger component: the rear end of the cold finger can be connected to an external refrigerator, and the front end of the cold finger component is set in a fin shape, which can increase the contact area with the gas in the tank body, faster cooling rate, and facilitate the flow of gaseous liquid nitrogen downward from the fins after low temperature liquefaction.

[0024] 4. The upper end of the tank body is surrounded by a heat-insulating member to prevent the cooling of the tank body by the cold finger member from spreading to the outside from the side, thereby reducing energy consumption.

[0025] 5. Liquid nitrogen is injected into the tank from the nitrogen injection port at the lower end. After injection, it is sealed by a plug. A sealing ring is provided on the plug to connect and seal with the protective cap to ensure the sealing and stability of the nitrogen injection port. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0027] Figure 1 This is a three-dimensional schematic diagram of a zero-consumption liquid nitrogen tank.

[0028] Figure 2 for Figure 1 Cross-sectional view of the zero-consumption liquid nitrogen tank.

[0029] Figure 3 for Figure 2 Enlarged view of F1 of the zero-consumption liquid nitrogen tank.

[0030] Figure 4 This is a cross-sectional view of the overall structure of the zero-consumption liquid nitrogen tank.

[0031] Figure 5 This is an enlarged view of the sealing protection parts of the zero-consumption liquid nitrogen tank.

[0032] Reference numerals: tank body, 1; circulating refrigeration mechanism, 2; cold finger component, 21; liquefaction plate, 211; refrigerator, 22; nitrogen injection port, 3; plug, 4; sealing protection component, 5; protective cap, 51; sealing ring, 52; heat insulation component, 6; extraction component, 7; DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0036] Example 1

[0037] Reference Figures 1 to 3 , which is the first embodiment of the present utility model, provides a zero-consumption liquid nitrogen tank, which includes a tank body 1 and a circulating refrigeration mechanism 2. Liquid nitrogen can be stored by setting the tank body 1, and vaporized nitrogen can be cryogenically liquefied by the circulating refrigeration mechanism 2.

[0038] Specifically, it includes a tank body 1, a circulating refrigeration mechanism 2 is provided on the tank body 1, liquid nitrogen is provided inside the tank body 1, and the liquid nitrogen can be vaporized inside the tank body 1, the circulating refrigeration mechanism 2 can circulate and cool the nitrogen and convert it into liquid nitrogen, the tank body 1 can freeze the sample through the liquid nitrogen, and the interior of the tank body 1 is sealed.

[0039] Preferably, by sealing the tank body 1, it is possible to ensure smooth conversion between liquid nitrogen and nitrogen gas, while ensuring that the loss of liquid nitrogen will not occur, so as to achieve the purpose of only adding liquid nitrogen once throughout life.

[0040] Preferably, the liquid nitrogen in the tank body 1 can be circulated and converted into nitrogen gas, and the nitrogen gas is cryogenically liquefied through the circulating refrigeration mechanism 2, so that the nitrogen gas is converted into liquid nitrogen again, thereby realizing the circulating refrigeration of liquid nitrogen.

[0041] In summary, the utility model places liquid nitrogen inside the sealed tank body 1, and the liquid nitrogen will vaporize during the refrigeration conduction process. The vaporized nitrogen can be liquefied by using the circulating refrigeration mechanism 2, ensuring that nitrogen can be added once and used for life, thereby greatly saving the cost of liquid nitrogen.

[0042] Example 2

[0043] Reference Figures 1 to 5 This is the second embodiment of the present utility model. In the previous embodiment, the zero-consumption liquid nitrogen tank includes a tank body 1 and a circulating refrigeration mechanism 2. The tank body 1 can be used to store liquid nitrogen, and the circulating refrigeration mechanism 2 can be used to liquefy the vaporized nitrogen at low temperature.

[0044] Specifically, it includes a tank body 1, a circulating refrigeration mechanism 2 is provided on the tank body 1, liquid nitrogen is provided inside the tank body 1, and the liquid nitrogen can be vaporized inside the tank body 1, the circulating refrigeration mechanism 2 can circulate and cool the nitrogen and convert it into liquid nitrogen, the tank body 1 can freeze the sample through the liquid nitrogen, and the interior of the tank body 1 is sealed.

[0045] Preferably, by sealing the tank body 1, it is possible to ensure smooth conversion between liquid nitrogen and nitrogen gas, while ensuring that the loss of liquid nitrogen will not occur, so as to achieve the purpose of only adding liquid nitrogen once throughout life.

[0046] Preferably, the liquid nitrogen in the tank body 1 can be circulated and converted into nitrogen gas, and the nitrogen gas is cryogenically liquefied through the circulating refrigeration mechanism 2, so that the nitrogen gas is converted into liquid nitrogen again, thereby realizing the circulating refrigeration of liquid nitrogen.

[0047] Furthermore, the circulating refrigeration mechanism 2 includes a cold finger component 21 , which is arranged inside the tank body 1 and at the upper end of the tank body 1 . The cold finger component 21 can liquefy nitrogen and seal the tank body 1 .

[0048] Preferably, the liquid nitrogen in the tank body 1 will vaporize during the refrigeration process, and the cold finger component 21 can convert nitrogen into liquid nitrogen because it is in an ultra-low temperature state.

[0049] Furthermore, the cold finger component 21 includes a plurality of groups of liquefied sheets 211 , gaps are provided between the plurality of groups of liquefied sheets 211 , and the liquefied sheets 211 are provided in a fin shape.

[0050] Preferably, by configuring the liquefaction sheet 211 to be a fin-shaped structure, the contact area with the nitrogen can be maximized, and the nitrogen can flow down easily after being cooled and liquefied on the fin, and the nitrogen can be liquefied into liquid nitrogen again.

[0051] Furthermore, the circulating refrigeration mechanism 2 further includes a refrigerator 22 . The refrigerator 22 is disposed at the upper end of the cold finger component 21 . The refrigerator 22 can cool the cold finger component 21 .

[0052] Preferably, the cold finger component 21 can be continuously cooled by the refrigerator 22 to ensure that the cold finger component 21 can circulate and liquefy nitrogen.

[0053] It should be noted that the gas-liquid circulation conversion of liquid nitrogen is carried out in a sealed tank, so that liquid can be added once during the production process and used for life, saving a large amount of liquid nitrogen and greatly reducing costs.

[0054] Furthermore, the tank body 1 is provided with a nitrogen injection port 3 , and a plug 4 is provided in the nitrogen injection port 3 , and the plug 4 can seal the nitrogen injection port 3 .

[0055] Furthermore, one quarter of the tank body 1 can be injected into the tank body 1 .

[0056] Furthermore, liquid nitrogen can be injected into the tank body 1 through the nitrogen injection port 3 .

[0057] Furthermore, a sealing protection member 5 is included. The sealing protection member 5 is arranged on the outside of the plug 4 and can provide sealing protection for the nitrogen injection port 3 and the plug 4 .

[0058] Furthermore, the sealing protection member 5 includes a protective cap 51 and a sealing ring 52 ; a receiving cavity is defined in the protective cap 51 to accommodate the plug 4 , and the protective cap 51 is connected to the tank body 1 via the sealing ring 52 .

[0059] Preferably, the nitrogen injection port 3 can be sealed by providing a plug 4 , and the sealing and stability of the nitrogen injection port 3 can be ensured by providing a protective cap 51 .

[0060] Preferably, before use, a quarter of liquid nitrogen can be injected into the tank body 1 through the nitrogen injection port 3; then the nitrogen injection port 3 is sealed with a plug 4 to form an irreversible seal.

[0061] Experiments have shown that when one quarter of liquid nitrogen is injected into the tank body 1, the pressure generated by vaporization has the lowest impact on the strength and service life of the tank body and will not cause any safety hazards.

[0062] Furthermore, a heat-insulating component 6 is provided on the side of the upper end of the tank body 1 , and the heat-insulating component 6 can wrap the cold finger component 21 , and the heat-insulating component 6 can provide heat insulation protection for the cold finger component 21 .

[0063] Furthermore, the heat-insulating component 6 is a heat-insulating layer with a certain thickness.

[0064] Furthermore, the heat-insulating component 6 is a heat-insulating layer of a certain thickness, and a heat-insulating cavity is provided inside.

[0065] Preferably, it can prevent the cooling of the tank body by the cold finger member 21 from spreading to the outside from the side, thereby reducing energy consumption;

[0066] Preferably, the cold finger component 21 can be thermally insulated and protected by providing the thermal insulation component 6 with a thermal insulation layer; and a thermal insulation cavity can be provided inside the thermal insulation layer.

[0067] Furthermore, it also includes an extraction member 7, which is arranged on the heat-insulating component 6 and can extract the gas inside the heat-insulating component 6.

[0068] Preferably, the extraction member 7 can be used to extract the gas inside the insulation layer of the insulation component 6, so that the insulation cavity remains in a vacuum state, thereby further improving the insulation protection effect, preventing the refrigeration in the tank body from the cold finger component 21 from spreading to the outside from the side, and reducing energy consumption.

[0069] In summary, the present invention uses a tank body to hold liquid nitrogen, and the temperature inside the tank increases to gasify the liquid nitrogen. The circulating refrigeration mechanism 2 can liquefy the nitrogen, thereby circulating the liquid nitrogen, thereby achieving a one-time addition and lifelong use, saving a large amount of liquid nitrogen and significantly reducing costs; the tank body is small in size, and refrigeration and cooling are achieved by conducting temperature conduction to the outside, which can be applied to various usage scenarios, is easy to take out, and can be recycled;

[0070] The cold finger assembly 21 has a rear end that can be connected to an external refrigerator 22. The front end of the cold finger assembly 21 is fin-shaped, increasing the contact area with the gas inside the tank, accelerating the cooling rate and facilitating the flow of liquid nitrogen downward from the fins after liquefaction. An insulating member 6 is positioned around the upper end of the tank body to prevent the cooling effect of the cold finger assembly 21 from spreading outward from the sides, reducing energy consumption. Liquid nitrogen is injected into the tank body through the nitrogen injection port 3 at the lower end, which is then sealed by a plug 4. A sealing ring 52 is provided on the plug 4, which connects to the protective cap 51 to ensure the tightness and stability of the nitrogen injection port 3.

[0071] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0072] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0073] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A zero-consumption liquid nitrogen tank, characterized by: The invention comprises a tank body (1), wherein a circulating refrigeration mechanism (2) is provided on the tank body (1), liquid nitrogen is provided inside the tank body (1), and the liquid nitrogen can be vaporized inside the tank body (1), the circulating refrigeration mechanism (2) can circulate and cool the nitrogen and convert it into liquid nitrogen, and the tank body (1) can freeze the sample by the liquid nitrogen, and the interior of the tank body (1) is sealed.

2. The zero-consumption liquid nitrogen tank according to claim 1, characterized in that: The circulating refrigeration mechanism (2) comprises a cold finger component (21), which is arranged inside the tank body (1) and at the upper end of the tank body (1). The cold finger component (21) can liquefy nitrogen and seal the tank body (1).

3. The zero-consumption liquid nitrogen tank according to claim 2, characterized in that: The cold finger component (21) comprises a plurality of groups of liquefied sheets (211), gaps are provided between the plurality of groups of liquefied sheets (211), and the liquefied sheets (211) are configured in a fin shape.

4. The zero-consumption liquid nitrogen tank according to claim 2 or 3, characterized in that: The circulating refrigeration mechanism (2) further comprises a refrigerator (22), which is arranged at the upper end of the cold finger component (21) and can cool the cold finger component (21).

5. The zero-consumption liquid nitrogen tank according to claim 1, characterized in that: The tank body (1) is further provided with a nitrogen injection port (3), and a plug (4) is provided in the nitrogen injection port (3), and the plug (4) can seal the nitrogen injection port (3).

6. The zero-consumption liquid nitrogen tank according to claim 5, characterized in that: Liquid nitrogen can be injected into the interior of the tank body (1) through the nitrogen injection port (3).

7. The zero-consumption liquid nitrogen tank according to claim 6, characterized in that: It also includes a sealing protection member (5), which is arranged outside the plug (4) and can provide sealing protection for the nitrogen injection port (3) and the plug (4).

8. The zero-consumption liquid nitrogen tank according to claim 7, characterized in that: The sealing protection member (5) comprises a protective cap (51) and a sealing ring (52); a receiving cavity is provided in the protective cap (51) for receiving the plug (4); and the protective cap (51) is connected to the tank body (1) via the sealing ring (52).

9. The zero-consumption liquid nitrogen tank according to claim 2, characterized in that: A heat-insulating component (6) is provided on the side of the upper end of the tank body (1), and the heat-insulating component (6) can wrap the cold finger component (21), and the heat-insulating component (6) can provide heat insulation protection for the cold finger component (21).

10. The zero-consumption liquid nitrogen tank according to claim 9, characterized in that: The heat-insulating component (6) is a heat-insulating layer with a certain thickness.

11. The zero-consumption liquid nitrogen tank according to claim 9, characterized in that: The heat-insulating component (6) is a heat-insulating layer with a certain thickness, and a heat-insulating cavity is provided inside.

12. The zero-consumption liquid nitrogen tank according to claim 11, characterized in that: It also includes an extraction member (7), which is arranged on the heat-insulating component (6) and can extract gas inside the heat-insulating component (6).

13. The zero-consumption liquid nitrogen tank according to any one of claims 5 to 12, characterized in that: A quarter of liquid nitrogen can be injected into the interior of the tank (1).

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