Low-temperature light-proof heat preservation box

Abstract

A reserved layer, a buffer layer and a freezing layer are sequentially arranged, the freezing layer is filled with gel particles and freezing media, the buffer layer is filled with refrigeration media, a test tube rack is additionally arranged in the buffer layer, the buffer layer and the test tube rack are in direct contact, and the buffer layer and the freezing layer exchange heat through a heat exchange tube. The freezing medium of the freezing layer provides cooling capacity for the refrigeration medium of the buffer layer, the required temperature of the refrigeration medium is kept, the refrigeration medium is directly contacted with the sample test tube for heat preservation and refrigeration, the conduction area is enlarged, and the refrigeration effect is better; the heat insulation performance and the light shielding performance are enhanced by means of the outer packaging layer, the light shielding layer, the gel particles and the like, experiment requirements are met, and the heat preservation time is prolonged as much as possible; an anti-freezing handle is arranged to protect a user from being frostbitten; the box body has good oxidation resistance, corrosion resistance and ductility, and the situation that the real size of the box body is affected by temperature changes, and consequently the refrigeration effect is not accurate is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of test tube insulation boxes, and more specifically, to a low-temperature light-proof insulation box. Background Art

[0002] In laboratories, most of the reagents that are sensitive to temperature, such as antibodies and proteins, are made using ice machines and put into foam boxes to create a low-temperature environment for temperature control. This method is cumbersome and laborious, and wet ice melts quickly in the external environment and needs to be replaced regularly and in a timely manner. The ice machine itself is expensive, which will put great pressure on the laboratory's budget.

[0003] For example, application No. 201822040948.6 discloses a cold storage sample box, which realizes the refrigeration function through a cold storage agent. Not only is the duration short, but the refrigeration effect is also unstable. In addition, there are also some metal ice boxes on the market, which can be used by putting them in the refrigerator for a period of time in advance, but if you want to maintain the temperature control effect for a long time, you need to pre-cool them in an environment of -20℃ or lower in advance. This results in that when we take out the ice box from the low temperature environment to place the sample, the sample is easy to freeze again. Repeated freezing and thawing of antibodies and proteins will reduce their titer or inactivate them, and the disadvantages cannot be eliminated. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a low-temperature light-proof insulation box to solve one or more of the above-mentioned problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A low-temperature light-proof insulation box, comprising a ductile box body, characterized in that: the box body is divided into

[0007] The reserved layer has a hollow structure;

[0008] A buffer layer, the interior of which is filled with a refrigeration medium;

[0009] A freezing layer, which is filled with gel particles and freezing medium and is separated from the buffer layer by a metal partition;

[0010] A test tube rack is reserved in the buffer layer, the buffer layer is in direct contact with the sample test tube on the test tube rack, a heat exchange tube is preset in the freezing layer, the box body is provided with a liquid inlet at the reserved layer and a liquid outlet at the freezing layer, the liquid inlet, the buffer layer and the liquid outlet are connected

[0011] Furthermore, an outer packaging layer is provided on the inner wall of the box body, and the outer packaging layer is composed of 5 mm thermal insulation foam.

[0012] Furthermore, the heat exchange tube is communicated with the buffer layer, and the heat exchange tube is in contact with the freezing layer.

[0013] Furthermore, a light-shielding layer is provided on the outer surface of the box body.

[0014] Furthermore, the upper end of the test tube rack is flush with the buffer layer, and the depth of the test tube rack is smaller than the buffer layer.

[0015] Furthermore, an antifreeze handle is provided on the outside of the box body.

[0016] In summary, the utility model has the following beneficial effects:

[0017] 1. The liquid in the buffer layer is continuously heat exchanged through the freezing layer and heat exchange tube at the bottom, which not only effectively eliminates the situation where the sample is quickly frozen, but also makes up for the cold loss caused by the low temperature storage of the sample tube in the buffer layer, and reduces the frequency of replacement of the heat transfer medium;

[0018] 2. The box body is made of materials with high ductility, high oxidation resistance and high corrosion resistance, which can meet the use requirements of experimental equipment while preventing the box body from thermal expansion and contraction, causing volume changes and excessively affecting the storage effect;

[0019] 3. The outer packaging layer is set to slow down the heat diffusion and prolong the storage time; the light-proof layer is set to facilitate the light-proof experiment;

[0020] 4. Prevent users from frostbite by setting anti-freeze handles;

[0021] 5. The buffer layer is in contact with the wall of the sample tube to increase the conduction area and achieve a better refrigeration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the internal structure of an implementation method provided by the utility model;

[0023] Figure 2 A schematic diagram of the external structure of an implementation method provided by the utility model;

[0024] Figure 3 A top view of a test tube rack according to an embodiment of the present invention;

[0025] Figure 4 A graph showing the surface temperatures of an insulation box according to an embodiment of the present invention and a conventional insulation box in different time periods.

[0026] In the figure: 1. box body; 2. reserved layer; 3. buffer layer; 4. freezing layer; 5. test tube rack; 6. heat exchange tube; 7. liquid inlet; 8. liquid outlet; 9. outer packaging layer; 10. antifreeze handle. DETAILED DESCRIPTION

[0027] Example:

[0028] The following is combined with Figure 1-4 The utility model is described in further detail.

[0029] A low-temperature light-proof insulation box, such as Figure 2 As shown, the main box body 1 is made of black high-density polypropylene. The box body 1 made of this material has excellent ductility. During the freezing process, the total volume of the box body 1 changes very little, which will not have much impact on the storage of the sample. At the same time, polypropylene has good antioxidant and acid-base corrosion resistance, which can meet the requirements of experimental equipment. The black box body 1 can absorb external light to a certain extent, and with the light-shielding layer set on the outer surface of the box body 1, the overall light-shielding performance of the insulation box can be guaranteed, which is convenient for light-shielding experiments. A special antifreeze handle 10 is provided on the outside of the box body 1. The risk of frostbite can be effectively avoided by carrying the insulation box with the antifreeze handle 10.

[0030] like Figure 1 and Figure 3 As shown, the interior of the box body 1 adopts a three-layer structure design of upper, middle and lower layers. The upper layer is a reserved layer 2, and the internal structure is hollow, which is used to lay the liquid inlet pipeline and the upper end of the reserved sample tube. A liquid inlet port 7 is specially provided on the top of the box body 1, which can also adapt to sample tubes of different lengths.

[0031] The middle layer is the buffer layer 3. A special liquid outlet 8 is provided at the bottom of the buffer layer 3 on the side of the box body 1. The liquid inlet 7, the buffer layer 3 and the liquid outlet 8 are connected. The external pre-cooled refrigeration medium, generally water, is injected through the liquid inlet 7. A test tube rack 5 is preset in the buffer layer 3. The top of the test tube rack 5 is flush with the buffer layer 3. The sample test tube on the test tube rack 5 can directly contact the buffer layer 3. In this way, the refrigeration medium directly contacts the sample test tube placed on the test tube rack 5, which not only increases the conduction area, but also realizes the temperature transfer contact with the sample, ensuring that the sample can be refrigerated at a specified temperature. There is also a flowing liquid medium space between the samples to maintain the overall temperature uniformity of the sample. At the same time, the bottom of the buffer layer 3 is 10mm deeper than the test tube rack 5, which is used for subsequent buffering of heat exchange with the freezing layer 4 at the bottom. The freezing layer 4 and the buffer layer 3 are separated by a metal partition, and the heat conduction between the two layers is mainly improved by a heat exchanger.

[0032] The freezing layer 4 is filled with gel particles and freezing medium, and a plurality of heat exchange tubes 6 are preset in the freezing layer 4. The heat exchange tubes 6 are connected to the buffer layer 3, so that the refrigeration medium in the buffer layer 3 can have another way to contact and exchange heat with the freezing medium in the freezing layer 4, which is convenient for heat exchange between the two layers. The freezing medium is water and sodium polyacrylate, which can be repeatedly frozen to reduce costs.

[0033] An outer packaging layer 9 is provided on the inner wall of the box body 1, covering the buffer layer 3, the freezing layer 4 and the reserved layer 2. The outer packaging layer 9 is composed of 5 mm thermal insulation foam, which can maintain a low temperature environment for a longer period of time.

[0034] Instructions for use: Before pre-cooling, open the liquid outlet 8 to discharge the refrigeration medium in the buffer layer 3, and place the entire insulated box in a -80°C environment for cooling, mainly for the freezing medium to absorb cold, and the gel particles are to better maintain the low temperature state of the freezing medium, and also play a certain freezing function. When in use, pre-cooled water of appropriate temperature is used as the refrigeration medium to enter the buffer layer 3 from the liquid inlet 7 to refrigerate the sample in the sample tube, and the freezing medium continuously exchanges heat with the refrigeration medium to ensure long-term refrigeration.

[0035] Effect comparison: The insulated box of the present application and the conventional insulated box were placed in a -20°C environment overnight, and the two insulated boxes were taken out the next day. 4°C pre-cooled water was added to the insulated box of the present application. The two insulated boxes were placed on a table at room temperature and the surface temperature of the insulated boxes was detected with an F59 (Fluke) handheld thermometer every 20 minutes to compare the two. The pre-cooled water of the insulated box of the present application needed to be replaced every 60 minutes.

[0036] like Figure 4 As shown, the results show that conventional insulation boxes are not suitable for precooling at -80°C, and it takes 40 to 60 minutes to return to 0°C, during which it is not suitable for keeping the sample warm. However, the insulation box of the present application is provided with a buffer layer 3. After adding precooling water, the surface temperature is 0 to 10°C, and the temperature can be controlled below 16°C within 160 minutes. Whether it is the precooling limit or the insulation time, it has significant advantages.

[0037] It should be noted that this specific embodiment is merely an explanation of the present utility model, and it is not a limitation of the present utility model. After reading this specification, those skilled in the art can make non-creative modifications to the present embodiment as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

Claims

1. A low-temperature, light-proof, heat-insulating box, comprising a ductile box body (1), characterized in that: The box body (1) is divided into: A reserved layer (2) having a hollow structure; A buffer layer (3), the interior of which is filled with a refrigeration medium; A freezing layer (4), which is filled with gel particles and a freezing medium and is separated from the buffer layer (3) by a metal partition; A test tube rack (5) is reserved in the buffer layer (3), the buffer layer (3) is in direct contact with the sample test tube on the test tube rack (5), a heat exchange tube (6) is preset in the freezing layer (4), the box body (1) is provided with a liquid inlet (7) at the reserved layer and a liquid outlet (8) at the freezing layer (4), and the liquid inlet (7), the buffer layer (3) and the liquid outlet (8) are in communication.

2. The low-temperature light-proof insulation box according to claim 1, characterized in that: The inner wall of the box body (1) is provided with an outer packaging layer (9), and the outer packaging layer (9) is composed of 5 mm thermal insulation foam.

3. The low-temperature light-proof insulation box according to claim 1, characterized in that: The heat exchange tube (6) is in communication with the buffer layer (3), and the heat exchange tube (6) is in contact with the freezing layer (4).

4. The low-temperature light-proof insulation box according to claim 1, characterized in that: The outer surface of the box body (1) is provided with a light-shielding layer.

5. The low-temperature light-proof insulation box according to claim 1, characterized in that: The upper end of the test tube rack (5) is flush with the buffer layer (3), and the depth of the test tube rack (5) is smaller than that of the buffer layer (3).

6. The low-temperature light-proof insulation box according to claim 1, characterized in that: An antifreeze handle (10) is provided on the outside of the box body (1).

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