Portable refrigerator

Abstract

The utility model discloses a portable refrigerating machine which comprises a cooling mechanism and a cold finger assembly. A cold finger assembly is detachably connected to the lower portion of the cooling mechanism. Liquid nitrogen can be stored in the cold finger assembly, and the cooling mechanism can cool and liquefy gasified nitrogen in the cold finger assembly. The liquid nitrogen cooling device has the advantages that liquid nitrogen can be stored in the cold finger assembly and gasified, the gasified nitrogen can rise into the cooling mechanism, the nitrogen can be converted into liquid nitrogen through the cooling mechanism, the liquid nitrogen returns to the cold finger assembly, and the storage tank is cooled and gasified again; and circulating liquefaction is carried out through the cooling mechanism, so that the liquid can be used for the whole life after being added once, a large amount of liquid nitrogen is saved, and the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of biological samples, in particular to a portable refrigerator. Background Art

[0002] In the field of biological sample storage, cryogenic storage and retrieval equipment is used to store biological samples such as blood samples, vaccines, bacteria and virus strains at low temperatures, so that the samples are kept in a low temperature state and preserved active.

[0003] The cooling device currently used is liquid nitrogen cooling, but the daily consumption of liquid nitrogen in each liquid nitrogen tank is about 13L. The consumption of liquid nitrogen tanks in multiple systems is very large. The wasted liquid nitrogen cannot be recycled, which increases a lot of costs. For this reason, the inventor has designed a recyclable liquid nitrogen cooling device. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above problems or problems existing in the prior art, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a portable refrigerator, which can convert gasified nitrogen into liquid nitrogen through a cooling mechanism by adding liquid nitrogen only once in the cold finger assembly for recycling, thereby realizing the lifelong use of liquid nitrogen and saving a lot of costs.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a portable refrigerator, which includes a cooling mechanism and a cold finger assembly; the cold finger assembly is detachably connected to the bottom of the cooling mechanism; liquid nitrogen can be stored in the cold finger assembly, and the cooling mechanism can cool and liquefy the gasified nitrogen in the cold finger assembly.

[0008] As a preferred solution of the portable refrigerator of the utility model, the cold finger assembly includes a central shaft, the interior of the central shaft is hollow, and the upper end is connected to the cooling mechanism, and liquid nitrogen can be stored in the central shaft.

[0009] As a preferred solution of the portable refrigerator of the utility model, the central axis includes a first cavity and a second cavity; the second cavity is arranged below the first cavity, and the first cavity is connected to the second cavity, and liquid nitrogen can be stored in the first cavity and the second cavity.

[0010] As a preferred solution of the portable refrigerator of the utility model, a heat preservation tank body is arranged on the side of the upper end of the central axis, and the heat preservation tank body can hydraulically insulate the cooling mechanism.

[0011] As a preferred solution of the portable refrigerator of the utility model, the inner diameter of the first cavity is greater than the inner diameter of the second cavity.

[0012] As a preferred solution of the portable refrigerator of the utility model, the central axis is cylindrical or elliptical.

[0013] As a preferred solution of the portable refrigerator of the utility model, the cooling mechanism includes a refrigeration module and a refrigeration head; a refrigeration head is arranged below the refrigeration module, and the refrigeration head is arranged at the upper end of the inner wall cavity of the cold finger assembly, and the refrigeration head can liquefy nitrogen.

[0014] As a preferred solution of the portable refrigerator of the utility model, the refrigeration head includes at least one group of fins, and the fins can convert nitrogen into liquid nitrogen.

[0015] As a preferred solution of the portable refrigerator of the utility model, the cooling mechanism also includes a heat recovery mechanism, which is arranged above the refrigeration head, and helium is sealed inside the heat recovery mechanism, which can prevent temperature transfer.

[0016] As a preferred solution of the portable refrigerator of the utility model, it also includes a storage tank, the cold finger assembly is arranged inside the upper end of the storage tank and is sealed; the storage tank is a double-layer shell, and there is a vacuum between the double-layer shells.

[0017] As a preferred solution of the portable refrigerator of the utility model, a connecting fixture is arranged on the side of the central axis, and the connecting fixture is connected and fixed to the storage tank.

[0018] The utility model also provides a low-temperature storage system, providing the following technical solution: comprising a portable refrigerator, including an open end arranged above the low-temperature storage system, and the portable refrigerator is detachably installed on the open end.

[0019] The beneficial effects of the utility model are as follows: the utility model can store liquid nitrogen in the cold finger assembly, and after being gasified by the liquid nitrogen, the gasified nitrogen can rise into the cooling mechanism, and the nitrogen can be converted into liquid nitrogen through the cooling mechanism, and return to the cold finger assembly to cool and gasify the storage tank again, so as to circulate and liquefy through the cooling mechanism, thereby realizing one-time liquid addition and lifelong use, saving a large amount of liquid nitrogen and greatly reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 It is an overall schematic diagram of Example 1 of the portable refrigerator.

[0022] Figure 2 This is an internal cross-sectional view of Example 1 of the portable refrigerator.

[0023] Figure 3 for Figure 2 Enlarged view of F1 of the portable refrigerator.

[0024] Figure 4 This is an enlarged schematic diagram of the cooling mechanism of the portable refrigerator.

[0025] Figure 5 This is a schematic diagram of Example 2 of a portable refrigerator.

[0026] Figure 6 for Figure 5 A cutaway view of the interior of a portable refrigerator.

[0027] Reference numerals: cooling mechanism, 1; cold finger assembly, 2; central axis, 25; first cavity, 251; second cavity, 252; heat preservation tank body, 22; refrigeration module, 11; refrigeration head, 12; fin, 121; heat recovery mechanism, 15; storage tank, 3; connecting fixture, 7; DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, 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 in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and 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.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in 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.

[0031] Example 1

[0032] Reference Figures 1 to 4 , which is the first embodiment of the utility model, and provides a portable refrigerator, which includes a cooling mechanism 1 and a cold finger assembly 2. Liquid nitrogen is stored in the cold finger assembly 2 and can be naturally gasified, thereby being converted into nitrogen and rising into the cooling mechanism 1. The nitrogen can be liquefied by the cooling mechanism 1, thereby realizing the circulation of nitrogen and converting it into liquid nitrogen.

[0033] Specifically, it includes a cooling mechanism 1 and a cold finger assembly 2; the cold finger assembly 2 is detachably connected to the bottom of the cooling mechanism 1; liquid nitrogen can be stored in the cold finger assembly 2, and the cooling mechanism 1 can cool and liquefy the gasified nitrogen in the cold finger assembly 2.

[0034] Furthermore, the cold finger assembly 2 includes a central shaft 25 , the interior of the central shaft 25 is hollow, and the upper end is connected to the cooling mechanism 1 , and liquid nitrogen can be stored in the central shaft 25 .

[0035] Furthermore, the central shaft 25 includes a first cavity 251 and a second cavity 252 ; the second cavity 252 is disposed below the first cavity 251 , and the first cavity 251 is communicated with the second cavity 252 , and liquid nitrogen can be stored in the first cavity 251 and the second cavity 252 .

[0036] Furthermore, the inner diameter of the first cavity 251 is greater than the inner diameter of the second cavity 252 .

[0037] Preferably, the first cavity 251 is disposed inside the upper end of the storage tank 3 .

[0038] Furthermore, the central axis 25 is cylindrical or elliptical.

[0039] Preferably, the central axis 25 may also be a square, a diamond, or any other shape, or may be a special-shaped piece.

[0040] Furthermore, the cooling mechanism 1 includes a refrigeration module 11 and a refrigeration head 12; the refrigeration head 12 is arranged below the refrigeration module 11, and the refrigeration head 12 is arranged at the upper end of the inner wall cavity of the cold finger assembly 2, and the refrigeration head 12 can liquefy nitrogen.

[0041] Preferably, the cooling head 12 can be cooled by the cooling module, the nitrogen can be liquefied by the cooling head 12, and the liquefied liquid nitrogen can flow into the second cavity 252 to be gasified again.

[0042] Preferably, the cooling mechanism 1 is a Stirling refrigeration mechanism.

[0043] The sample in the storage tank 3 can be cryogenically frozen by liquid nitrogen.

[0044] Furthermore, the cooling head 12 includes at least one group of fins 121, and the fins 121 can convert nitrogen into liquid nitrogen.

[0045] Preferably, by setting the cooling head 12 in the shape of a fin, the contact area with the nitrogen can be increased, and cooling can be performed quickly, while facilitating the liquid nitrogen to flow down.

[0046] Furthermore, the cooling mechanism 1 also includes a heat recovery mechanism 15, which is arranged above the refrigeration head 12. Helium is sealed inside the heat recovery mechanism 15. The heat recovery mechanism 15 can prevent temperature transfer and avoid heat exchange.

[0047] Furthermore, the cold finger assembly 2 is arranged inside the upper end of the storage tank 3 and is sealed; the storage tank 3 is double-layered.

[0048] By setting the storage tank 3 as a double layer, it can be ensured that the temperature inside the storage tank 3 is in contact with the normal temperature outside. The middle position of the double layer of the storage tank 3 can be a vacuum to further keep the temperature inside the storage tank 3 warm.

[0049] Furthermore, a connecting fixture 7 is provided on the side of the central axis 25 , and the connecting fixture 7 is connected and fixed to the storage tank 3 .

[0050] Preferably, liquid nitrogen may be provided inside the storage tank 3 , and the temperature of the storage tank 3 may be adjusted by the cold finger assembly 2 .

[0051] In summary, the utility model is configured to be detachable between the cooling mechanism 1 and the cold finger assembly 2, so that different forms of cold finger assemblies 2 can be installed on the cooling mechanism 1, which is easy to install. Liquid nitrogen can be stored in the central axis 25, and the sample inside the storage tank 3 can be cryogenically frozen by liquid nitrogen. The liquid nitrogen temperature of the storage tank 3 can be adjusted by the cold finger assembly 2, and the liquid nitrogen in the cold finger assembly 2 will be vaporized. The vaporized nitrogen can be converted into liquid nitrogen by the cooling mechanism 1, and then returned to the cold finger assembly 2 for cooling and vaporization. In this way, a cyclic operation can be performed through the cooling mechanism 1. By adding liquid nitrogen once to the cold finger assembly 2, it can be used for life, which greatly reduces the usage of liquid nitrogen and reduces the cost of liquid nitrogen.

[0052] Example 2

[0053] Reference Figures 4-5 , which is the second embodiment of the utility model. In this embodiment, the portable refrigerator includes a cooling mechanism 1 and a cold finger assembly 2. Liquid nitrogen is stored in the cold finger assembly 2 and can be naturally gasified, thereby being converted into nitrogen and rising into the cooling mechanism 1. The nitrogen can be liquefied by the cooling mechanism 1, thereby realizing the circulation of nitrogen and converting it into liquid nitrogen.

[0054] Specifically, it includes a cooling mechanism 1 and a cold finger assembly 2; the cold finger assembly 2 is detachably connected to the bottom of the cooling mechanism 1; liquid nitrogen can be stored in the cold finger assembly 2, and the cooling mechanism 1 can cool and liquefy the gasified nitrogen in the cold finger assembly 2.

[0055] Preferably, the cooling mechanism 1 is a Stirling refrigeration mechanism.

[0056] Furthermore, the cold finger assembly 2 includes a central shaft 25 , the interior of the central shaft 25 is hollow, and the upper end is connected to the cooling mechanism 1 , and liquid nitrogen can be stored in the central shaft 25 .

[0057] Furthermore, the central axis 25 is cylindrical or elliptical.

[0058] Preferably, the central axis 25 may also be a square, a diamond, or any other shape, or may be a special-shaped piece.

[0059] A heat preservation tank body 22 is disposed on the side of the upper end of the central shaft 25 , and the heat preservation tank body 22 can hydraulically insulate the cooling mechanism 1 .

[0060] Preferably, the heat-insulating tank body 22 can insulate the refrigeration head 12 and the upper end of the central axis 25 to a certain extent.

[0061] Preferably, the central axis 25 can be set to any length as needed.

[0062] Preferably, the central axis 25 may be provided with cooling liquid.

[0063] Preferably, the central shaft 25 in this embodiment is integrated, and the upper end of the central shaft 25 is directly connected to the cooling mechanism 1 .

[0064] It should be noted that the cooling mechanism 1 can be quickly docked with cold finger assemblies 2 of different models.

[0065] Furthermore, the cooling mechanism 1 includes a refrigeration module 11 and a refrigeration head 12; the refrigeration head 12 is arranged below the refrigeration module 11, and the refrigeration head 12 is arranged at the upper end of the inner wall cavity of the cold finger assembly 2, and the refrigeration head 12 can liquefy nitrogen.

[0066] Preferably, the cooling head 12 can be cooled by the cooling module, the nitrogen can be liquefied by the cooling head 12, and the liquefied liquid nitrogen can flow into the second cavity 252 to be gasified again.

[0067] The sample in the storage tank 3 can be cryogenically frozen by liquid nitrogen.

[0068] Furthermore, the cooling head 12 includes at least one group of fins 121, and the fins 121 can convert nitrogen into liquid nitrogen.

[0069] Preferably, by setting the cooling head 12 in the shape of a fin, the contact area with the nitrogen can be increased, and cooling can be performed quickly, while facilitating the liquid nitrogen to flow down.

[0070] Furthermore, the cooling mechanism 1 also includes a heat recovery mechanism 15, which is arranged above the refrigeration head 12. Helium is sealed inside the heat recovery mechanism 15. The heat recovery mechanism 15 can prevent temperature transfer and avoid heat exchange.

[0071] Furthermore, the cold finger assembly 2 is arranged inside the upper end of the storage tank 3 and is sealed; the storage tank 3 is double-layered.

[0072] By setting the storage tank 3 as a double layer, it can be ensured that the temperature inside the storage tank 3 is in contact with the normal temperature outside. The middle position of the double layer of the storage tank 3 can be a vacuum to further keep the temperature inside the storage tank 3 warm.

[0073] Furthermore, a connecting fixture 7 is provided on the side of the central axis 25 , and the connecting fixture 7 is connected and fixed to the storage tank 3 .

[0074] Preferably, liquid nitrogen may be provided inside the storage tank 3 , and the temperature of the storage tank 3 may be adjusted by the cold finger assembly 2 .

[0075] The present embodiment further provides a low-temperature storage system, including a portable refrigerator. An open end is arranged on the top of the low-temperature storage system, and the portable refrigerator is detachably mounted on the open end.

[0076] Preferably, the portable refrigerator can be conveniently carried and replaced, and the entire set of portable refrigerators can be quickly replaced.

[0077] In summary, the utility model arranges the cooling mechanism 1 and the cold finger assembly 2 in a detachable manner, so that different forms of cold finger assemblies 2 can be installed on the cooling mechanism 1, and installation and disassembly are convenient; liquid nitrogen has zero loss ultra-low temperature, and can achieve automatic adjustable technology of +5°C to -200°C. Long-term use can be achieved by replenishing liquid nitrogen once, which is more energy-saving and environmentally friendly and reduces the cost of use.

[0078] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. 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 ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also 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 a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0079] 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.

[0080] It will be appreciated that in the development of any actual implementation, 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 be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0081] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A portable refrigerator, characterized in that: The invention comprises a cooling mechanism (1) and a cold finger assembly (2); the cold finger assembly (2) is detachably connected to the bottom of the cooling mechanism (1); liquid nitrogen can be stored in the cold finger assembly (2), and the cooling mechanism (1) can cool and liquefy the gasified nitrogen in the cold finger assembly (2).

2. The portable refrigerator according to claim 1, characterized in that: The cold finger assembly (2) comprises a central shaft (25), the interior of the central shaft (25) is hollow, and the upper end is connected to the cooling mechanism (1), and liquid nitrogen can be stored in the central shaft (25).

3. The portable refrigerator according to claim 2, characterized in that: The central axis (25) comprises a first cavity (251) and a second cavity (252); the second cavity (252) is arranged below the first cavity (251), and the first cavity (251) is communicated with the second cavity (252); liquid nitrogen can be stored in the first cavity (251) and the second cavity (252).

4. The portable refrigerator according to claim 2, characterized in that: A heat-insulating tank body (22) is arranged on the side of the upper end of the central axis (25), and the heat-insulating tank body (22) can hydraulically insulate the cooling mechanism (1).

5. The portable refrigerator according to claim 3, characterized in that: The inner diameter of the first cavity (251) is greater than the inner diameter of the second cavity (252).

6. The portable refrigerator according to claim 5, characterized in that: The central axis (25) is cylindrical or elliptical.

7. The portable refrigerator according to claim 1, characterized in that: The cooling mechanism (1) comprises a refrigeration module (11) and a refrigeration head (12); the refrigeration head (12) is arranged below the refrigeration module (11), and the refrigeration head (12) is arranged at the upper end of the inner wall cavity of the cold finger assembly (2); the refrigeration head (12) can liquefy nitrogen.

8. The portable refrigerator according to claim 7, characterized in that: The refrigeration head (12) comprises at least one group of fins (121), and the fins (121) can convert nitrogen into liquid nitrogen.

9. The portable refrigerator according to claim 7, characterized in that: The cooling mechanism (1) further comprises a heat recovery mechanism (15), wherein the heat recovery mechanism (15) is arranged above the refrigeration head (12), and helium is sealed inside the heat recovery mechanism (15). The heat recovery mechanism (15) can prevent temperature transfer.

10. The portable refrigerator according to claim 2, characterized in that: It also comprises a storage tank (3), wherein the cold finger assembly (2) is arranged inside the upper end of the storage tank (3) and is sealed; the storage tank (3) is a double-layer shell, and there is a vacuum between the double-layer shells.

11. The portable refrigerator according to claim 10, characterized in that: A connecting and fixing member (7) is provided on the side of the central axis (25), and the connecting and fixing member (7) is connected and fixed to the storage tank (3).

12. A low temperature storage system, characterized in that: The portable refrigerator according to any one of claims 1 to 11 comprises an open end arranged above the low-temperature storage system, and the portable refrigerator is detachably mounted on the open end.

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