Liquid nitrogen biological container

Abstract

The application discloses a liquid nitrogen biological container, which comprises an outer shell, an inner container and a neck; the inner container is arranged inside a cavity formed by the outer shell, the neck is fixed on the outer shell and communicates with the top end of the inner container; a rib cooling structure is arranged on the top of the neck, and a heat-conducting aluminum foil is arranged between the rib cooling structure and the neck; the rib cooling structure comprises a plurality of cooling units, and each cooling unit is nested with each other to form a circular ring structure and is arranged around the neck. The cooling unit comprises a fixed plate and a cooling rib; the cooling rib is made of aluminum alloy, the aluminum alloy has high heat conduction, and the outer surface area of the cooling rib is large, so that the local low temperature on the upper edge of the neck can be rapidly transmitted to the surface of the cooling rib, the surface of the cooling rib exchanges heat with air, the temperature of the cooling rib and the neck is maintained above the dew point temperature, and thus the neck is prevented from forming local low temperature water, frost (ice) and the like.

Description

TECHNICAL FIELD

[0001] The present invention belongs to the field of low-temperature container devices, and particularly relates to a liquid nitrogen biological container using a fin structure neck. BACKGROUND

[0002] Liquid nitrogen tanks, liquid nitrogen biological containers and biological barrels are different names for liquid nitrogen storage containers.

[0003] Liquid nitrogen tanks can generally be divided into two types: liquid nitrogen storage tanks and liquid nitrogen transport tanks. The storage tank is mainly used for the static storage of liquid nitrogen in the room, and is not suitable for long-distance transportation in the working state; the liquid nitrogen transport tank is specially designed for shock resistance to meet the transportation conditions. In addition to static storage, it can also be used for transportation when filled with liquid nitrogen. When using liquid nitrogen tanks for long-term storage of goods, it is necessary to replenish liquid nitrogen in time. The liquid nitrogen level should not be lower than the refrigerated goods.

[0004] The main uses of liquid nitrogen tanks include:

[0005] 1. Active preservation of animal semen.

[0006] At present, it is mainly used for the preservation of semen of excellent breeding bulls, sheep and other valuable animals, as well as long-distance transportation.

[0007] 2. Active preservation of biological samples.

[0008] In the field of biomedicine, vaccines, virus species, cells, and human and animal organs can be soaked in liquid nitrogen stored in liquid nitrogen tanks for long-term active preservation. When needed, they can be taken out, thawed and warmed up for use.

[0009] 3. Cryogenic treatment of metal materials.

[0010] Cryogenic treatment of metal materials using liquid nitrogen stored in liquid nitrogen tanks can change the metallographic structure of metal materials, significantly improve the hardness, strength and wear resistance of metal materials.

[0011] 4. Cryogenic assembly of precision parts.

[0012] After cryogenic treatment of precision parts, the assembly quality of the parts is improved, thereby improving the overall performance of the equipment or instrument.

[0013] 5. Refrigeration and freezing in the medical and health industry, and medical operation refrigeration.

[0014] 6. Liquid nitrogen cryotherapy is a new technology in the field of modern treatment. Liquid nitrogen cryotherapy is a comprehensive effect of cryobiology. Normal cells will be irreversibly damaged under extreme cold. It is through the state of extreme cold that the cells in the disease area are rapidly killed, so that the disease area is restored to normal. It is generally used to treat warts, corns and skin diseases, etc.

[0015] The neck material of the liquid nitrogen biological container on the market is stainless steel, and when the low temperature in the tank is conducted to the upper edge of the neck, local low temperature is formed, water and frost are formed on the surface of the neck, thereby affecting the use. SUMMARY

[0016] The purpose of the present application is to overcome the problems of the prior art and provide a liquid nitrogen biological container. The neck thermodynamic structure of the traditional liquid nitrogen container is changed by the structure of the liquid nitrogen biological container, which can effectively solve the problem of water and frost on the neck.

[0017] The purpose of the present application is achieved by the following technical solutions:

[0018] A liquid nitrogen biological container, comprising: an outer shell, an inner container and a neck; the inner container is arranged inside the cavity formed by the outer shell, and the neck is fixed on the outer shell and communicates with the top end of the inner container; the top of the neck is provided with a rib cooling structure, and a heat-conducting aluminum foil is arranged between the rib cooling structure and the neck; the rib cooling structure comprises a plurality of cooling units, and each cooling unit is nested to form a circular ring structure around the neck.

[0019] According to a preferred embodiment, the rib cooling structure further comprises a first cooling ring and a second cooling ring, and the first cooling ring and the second cooling ring are annular sheet structures, respectively arranged on the upper side and the lower side of the circular ring structure formed by the plurality of cooling units.

[0020] According to a preferred embodiment, the first cooling ring and the second cooling ring are connected to each cooling unit by screws.

[0021] According to a preferred embodiment, a limiting piece is further arranged on the side wall of the neck; the second cooling ring is fixedly arranged above the limiting piece and connected to the limiting piece by a bolt.

[0022] According to a preferred embodiment, the cooling unit comprises a fixed plate and a cooling rib; the fixed plate is a circular arc plate body, and each cooling rib is arranged on the outside of the fixed plate in a diverging structure parallel to the circular arc axis direction of the fixed plate.

[0023] According to a preferred embodiment, assembly limiting grooves and assembly limiting bosses are arranged on both sides of the plate body of the fixed plate to complete the assembly between adjacent cooling units.

[0024] According to a preferred embodiment, the plate body of the fixing plate is further provided with an assembly screw hole, which is arranged in parallel with the circular arc axial direction of the plate body.

[0025] According to a preferred embodiment, a vacuum interlayer is arranged between the outer shell and the inner container.

[0026] According to a preferred embodiment, the outer surface of the inner container is coated with a heat insulation layer.

[0027] According to a preferred embodiment, the inner side of the inner container is provided with a cryopreservation tray.

[0028] The foregoing main scheme of the present application and each further selected scheme thereof can be freely combined to form multiple schemes, all of which are the schemes that can be adopted and claimed by the present application. A person skilled in the art can understand that there are multiple combinations according to the prior art and common knowledge after understanding the scheme of the present application, all of which are the technical schemes claimed by the present application, and are not listed here.

[0029] The beneficial effects of the present application are as follows:

[0030] 1. The liquid nitrogen biological container can effectively prevent water and frost (ice) from being formed on the outer surface of the neck opening. Frost (ice) formed on the neck opening can freeze the plug cover and the neck opening together, resulting in the inability to open the plug cover to extract or cryopreserve the biological sample. If the ice block falls into the container, it will exist for a long time and may cause the cryopreservation tray to be unable to rotate (resulting in jamming), affecting normal use.

[0031] 2. The container with the rib structure neck opening only changes the temperature field distribution of the neck opening and has no effect on the overall heat leakage of the container.

[0032] 3. The neck opening of the conventional liquid nitrogen biological container will appear water, frost and defrosting phenomenon with the change of the environmental temperature and humidity, and finally form water droplets flowing down and wetting the ground, which can easily cause the staff to slip and fall when passing by. The container with the rib structure neck opening can completely avoid these problems.

[0033] 4. The parts of the rib heat transfer structure, especially the heat dissipation ribs, can be recycled and reused. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a schematic view of the tank structure of the container of the present application;

[0035] Figure 2 is Figure 1 is an enlarged structural schematic view of the I area in

[0036] Figure 3 is a schematic view of the rib heat dissipation structure of the container of the present application;

[0037] Figure 4 is a structural schematic diagram of a first cold guide ring in the container of the present application;

[0038] Figure 5 is a structural schematic diagram of a second cold guide ring in the container of the present application;

[0039] Figure 6 is a structural schematic diagram of a cold radiation unit in the container of the present application;

[0040] In the drawings: 101 - shell, 102 - inner container, 103 - cryogenic tray, 104 - vacuum interlayer, 105 - neck, 106 - fin cold radiation structure, 201 - first cold guide ring, 202 - second cold guide ring, 203 - limiting part, 204 - cold radiation unit, 301 - fixed plate, 302 - assembly limiting boss, 303 - assembly limiting groove, 304 - assembly screw hole, 305 - cold radiation fin. DETAILED DESCRIPTION

[0041] The present application is described in more detail by the specific examples below, and other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the specification. The present application can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0042] It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0043] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0044] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0045] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 or an electrical connection; they can refer to 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 invention based on the specific circumstances.

[0046] Example 1:

[0047] refer to Figure 1 and Figure 2 As shown in the figure, a liquid nitrogen biological container is illustrated, which includes: an outer shell 101, an inner container 102, and a neck 105.

[0048] The inner container 102 is disposed inside the cavity formed by the outer shell 101, and the neck 105 is fixed to the outer shell 101 and communicates with the top of the inner container 102. Specifically, one end of the neck 105 is welded to the inner container 102, and the other end is welded to the outer shell 101.

[0049] Preferably, a vacuum interlayer 104 is provided between the outer shell 101 and the inner container 102. Specifically, the cavity formed between the inner container 102 and the outer shell 101 is evacuated to form a high-vacuum heat-insulating environment.

[0050] Preferably, the outer surface of the inner container 102 is covered with an insulating layer. The insulating layer is formed of various heat-insulating materials.

[0051] Preferably, a cryopreservation tray 103 is provided inside the inner container 102. The cryopreservation tray 103 is fixed inside the inner container 102 and can rotate freely.

[0052] Preferably, a ribbed cooling structure 106 is provided at the top of the neck 105, and a thermally conductive aluminum foil is provided between the ribbed cooling structure 106 and the neck 105. The aluminum foil is used to cover the outer layer of the neck, so that the outer surface of the neck is in close contact with the concave surface of the ribbed cooling structure 106, thereby reducing the contact thermal resistance.

[0053] Preferably, refer to Figure 3 As shown, the ribbed cooling structure 106 includes several cooling units 204, and each cooling unit 204 is nested with each other to form a ring-shaped structure arranged around the neck 105.

[0054] Preferably, refer to Figure 4 and Figure 5As shown, the rib cooling structure 106 further comprises a first cooling ring 201 and a second cooling ring 202, which are annular sheet structures and are arranged on the upper side and the lower side of the circular ring structure formed by the plurality of cooling units 204, respectively.

[0055] Preferably, the first cooling ring 201 and the second cooling ring 202 are connected to each cooling unit 204 by screws. Thus, the positioning of each cooling unit 204 is completed by the first cooling ring 201 and the second cooling ring 202.

[0056] Further, a limiting piece 203 is arranged on the side wall of the neck 105, and the limiting piece 203 is welded to the side wall of the neck 105. The second cooling ring 202 is fixedly arranged above the limiting piece 203 and is connected to the limiting piece 203 by bolts.

[0057] Preferably, referring to Figure 6 As shown, the cooling unit 204 comprises a fixed plate 301 and a cooling rib 305. The fixed plate 301 is a circular arc plate body, and each cooling rib 305 is arranged on the outer side of the fixed plate 301 in a divergent structure parallel to the circular arc axial direction of the fixed plate 301. The outward extension length of the cooling rib 305 is set based on actual requirements.

[0058] The cooling rib 305 is made of aluminum alloy. Since aluminum alloy has good heat conduction and a large rib outer surface area, the local low temperature of the upper edge of the neck can be quickly transmitted to the surface of the cooling rib 305, the surface of the cooling rib 305 exchanges heat with the air, and the temperature of the cooling rib 305 and the neck is maintained above the dew point temperature, thereby avoiding the formation of local low temperature water and frost (ice) on the neck.

[0059] The cooling unit 204 structure is verified by finite element thermal simulation. The temperature field temperature difference gradient of the neck and the cooling rib 305 is small, and the difference between the minimum temperature of the neck and the cooling rib 305 and the ambient temperature is within 1.5℃. Although the structure of the cooling rib 305 changes the distribution of the neck temperature field, the overall heat leakage of the container does not increase. This technical solution can effectively solve the problem of water and frost formation on the neck.

[0060] Preferably, the plate body of the fixed plate 301 is provided with an assembly limiting recess 303 and an assembly limiting boss 302 on both sides, respectively. During the assembly of the plurality of cooling units 204 into a circular ring, the assembly limiting recess 303 and the assembly limiting boss 302 on both sides of the plate body of the fixed plate 301 are nested and clamped with each other to complete the assembly between adjacent cooling units 204.

[0061] Preferably, the plate body of the fixing plate 301 is further provided with an assembly screw hole 304, which is arranged in parallel with the circular arc axial direction of the plate body. The connecting screw of the first and second cold guiding rings 201 and 202 is fixedly connected with the assembly screw hole 304 through a threaded structure.

[0062] The liquid nitrogen biological container is provided with a rib cooling structure 106 outside the neck 105, which is limited by the first cold guiding ring 201 at the upper part and fastened with the neck 105 by a screw at the lower part. The outer surface of the neck 105 is wrapped with aluminum foil with a certain thickness and layers, and the rib cooling structure 106 and the neck are cooled by the wrapped aluminum foil. The parts of the rib cooling structure 106 are made of aluminum, which has excellent cold and heat conducting performance (heat conductivity coefficient 218 W / m.k). The protruding part of the rib increases the heat exchange area of the rib structure, and the surface area of the rib structure is about 5 times that of the original neck surface area, which increases the heat exchange efficiency of the neck with air.

[0063] The rib cooling structure 106 can quickly transfer the local low temperature of the upper edge of the neck 105 to the cooling rib 305, and the local low temperature of the upper edge of the neck 105 is uniformly dispersed to each part of the cooling rib 305 through the large-area heat exchange of the cooling rib 305 with air, so that the surface area of the cooling rib 305 is large and the heat exchange efficiency is improved, thereby maintaining the temperature of the outer surface of the neck 105 and the cooling rib 305 in the range of not less than the dew point temperature, and finally realizing that the neck does not form water and frost.

[0064] The above only describes the preferred embodiments of the present application and should not be used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A liquid nitrogen biological container characterized by, The liquid nitrogen biological container comprises an outer shell (101), an inner container (102) and a neck (105); The inner container (102) is arranged inside a cavity formed by the outer shell (101), and the neck (105) is fixed on the outer shell (101) and communicates with the top end of the inner container (102); A rib cooling structure (106) is arranged on the top of the neck (105), and a heat-conducting aluminum foil is arranged between the rib cooling structure (106) and the neck (105); The rib cooling structure (106) comprises a plurality of cooling units (204), and each cooling unit (204) is nested with each other to form a circular ring structure arranged around the neck (105); The rib cooling structure (106) further comprises a first cooling ring (201) and a second cooling ring (202), The first cooling ring (201) and the second cooling ring (202) are annular sheet structures, and are arranged on the upper side and the lower side of the circular ring structure formed by the plurality of cooling units (204), respectively; A limiting piece (203) is further arranged on the side wall of the neck (105); The second cooling ring (202) is fixedly arranged above the limiting piece (203) and is connected with the limiting piece (203) through a bolt; The cooling unit (204) comprises a fixed plate (301) and a cooling rib (305); The fixed plate (301) is a circular arc plate body, and each cooling rib (305) is arranged on the outer side of the fixed plate (301) in a divergent structure parallel to the circular arc axial direction of the fixed plate; The plate body of the fixed plate (301) is provided with an assembly limiting groove (303) and an assembly limiting boss (302) on both sides, respectively, so as to complete the assembly between adjacent cooling units.

2. The liquid nitrogen biological container of claim 1, wherein, The first cooling ring (201) and the second cooling ring (202) are connected with each cooling unit (204) through a screw.

3. The liquid nitrogen biological container of claim 1, wherein, The plate body of the fixed plate (301) is further provided with an assembly screw hole (304), and the assembly screw hole (304) is arranged in parallel with the circular arc axial direction of the plate body.

4. The liquid nitrogen biological container of claim 1, wherein, A vacuum interlayer (104) is arranged between the outer shell (101) and the inner container (102).

5. The liquid nitrogen biological container of claim 4, wherein, An insulating layer is arranged on the outer surface of the inner container (102).

6. The liquid nitrogen biological container of claim 1, wherein, A cryopreservation tray (103) is arranged on the inner side of the inner container (102).

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