CN107640443A - One kind detection sample stored frozen device - Google Patents

Abstract

The present invention provides a kind of detection sample stored frozen device, including casing, freeze proof flexible pipe, tells that casing includes outer case and internal box, the internal box is inside the outer case, characterized in that, the outer case is additionally provided with liquid nitrogen plan, the liquid nitrogen plan is located at the side of the internal box；The tank wall of the internal box is provided with heat-insulation layer, waterproof layer, the waterproof layer is symmetrically set in the heat-insulation layer both sides, the interior case lid is sequentially provided with metal level, heat-insulation layer, waterproof layer, the first hollow sandwich, the tank floor is additionally provided with the second hollow sandwich, first hollow sandwich is arranged with spray orifice, and second hollow sandwich is arranged with spray orifice.Shock-absorbing capacity of the present invention is good, safety and stability, is convenient for carrying, is easy to use, is adapted to the cold storage container as collection sample in sampling process out of doors, sample can be preserved in the case where being not connected to power supply 17 days.

Description

A detection sample freezing storage device

technical field

The invention relates to auxiliary equipment for a food detection sampling storage device, in particular to a detection sample freezing storage device.

Background technique

"Food is paramount to the people". Diet is the main way for the human body to absorb nutrients and energy from the external environment, and it is the basis and expression of life activities; It is not only related to the quality and rise and fall of a nation, but also directly affects the reputation of a country in international trade exchanges. There are 23 provinces in my country, 14 of which are along the coast. The coastline of the eastern and southern continents is more than 18,000 kilometers long, and the water area of the inland sea and marginal sea is about 4.7 million square kilometers. Growing, the safety of aquatic food should also be paid attention to.

Pollution of the growing waters of aquatic products or the illegal use of additives prohibited by the state or excessive use of additives in the breeding process will directly cause a sharp increase in the risk of aquatic food. Therefore, it is necessary to strengthen the sampling supervision of aquatic food, carry out sampling inspection of aquatic product food safety from time to time, gradually expand the coverage of sampling inspection of aquatic product food, increase the number of random inspection batches of high-risk aquatic product food, and continuously improve the problems after sampling inspection. The disposal capacity of aquatic products and food. Strictly implement the accountability mechanism for aquatic product food safety supervision, continuously strengthen supervision and inspection, unblock the reporting channels for aquatic product food safety, and ensure that there are no accidents in aquatic product food safety.

In the outdoor sampling process, some specific index parameters can only obtain accurate data under the condition of maintaining the freshness of aquatic products, and the time interval from sampling to entering the laboratory for testing cannot be guaranteed due to the geographical location of the sampling location. Therefore, based on the perishable characteristics of aquatic food, general cold storage methods cannot meet the fresh-keeping requirements. For this reason, liquid nitrogen quick-freezing is generally used, and the quick-frozen samples are put into the freezer where the sampling is done, and then transported back to the testing base laboratory through a refrigerator to ensure the freshness of the samples to be tested. In the prior art, liquid nitrogen tanks are divided into liquid nitrogen storage tanks and liquid nitrogen transport tanks. The storage tanks are mainly used for static storage of indoor liquid nitrogen, and are not suitable for long-distance transportation under working conditions; For transportation conditions, a special shockproof design has been made, but it is bulky and heavy, and it is inconvenient to carry. If liquid nitrogen is used as the freezing source of the sampling refrigerator, higher requirements are put forward for the shock resistance and cushioning stability of the refrigerator.

Therefore, there is an urgent need to provide a testing sample freezing storage device, which uses liquid nitrogen as a freezing source to provide quick-freezing and fresh-keeping for the testing samples.

Contents of the invention

In view of this, the present invention provides a frozen storage device for testing samples, which adopts a multiple buffer structure, and has good buffer performance. The seal is stretched to a certain extent, thereby changing the volume of the tank body, reducing the pressure generated by the increase in the internal pressure of the tank caused by shaking during transportation or use, improving the safety of the invention and prolonging the service life of the product. The invention can quickly and uniformly freeze the collected samples, prolong the freshness storage period of the samples, is safe, stable, convenient to carry and easy to use, and is suitable for being used as a refrigerated container for collecting samples during the outdoor sampling process.

The technical solution of the present invention is: a frozen storage device for test samples, including a box body and an antifreeze hose, the box body includes an outer box body and an inner box body, and the inner box body is arranged inside the outer box body , characterized in that the outer box is also provided with a liquid nitrogen device, and the liquid nitrogen device is arranged on one side of the inner box;

The outer box body is provided with an outer box cover, and the inner side of the outer box cover is symmetrically interlaced with elastic bodies and magnetic blocks;

The inner box body is provided with an inner box cover, the elastic body is against the outer side of the inner box cover, and the magnetic block is connected to the outer side of the inner box cover;

The wall of the inner box body is provided with an insulating layer and a waterproof layer, and the waterproof layer is symmetrically arranged on both sides of the insulating layer, and the inner box cover is provided with a metal layer, an insulating layer, a waterproof layer, and a first hollow layer in turn. Interlayer, the bottom surface of the box body is also provided with a second hollow interlayer, and the liquid nitrogen device is respectively communicated with the first hollow interlayer and the second hollow interlayer through an antifreeze hose; the structure of the inner box body in the present invention can be Collecting samples provides an effective thermal insulation environment, while having good waterproof performance. The thermal insulation layer can be realized by the thermal insulation material in the prior art, and the waterproof layer can be realized by the low temperature resistant waterproof material in the prior art.

In the present invention, the use of elastic body and magnetic block can be realized by any prior art, and the outer box body and the inner box body are closely matched at the upper end through the elastic body and magnetic block. After the outer box cover is closed, the elastic body and the inner box body The surface of the inner box cover is offset, which can have a certain buffering effect on the force on the surface of the box body; the magnetic block can be adsorbed by the metal layer of the inner box body to limit the position of the inner box body and avoid the impact of the inner box body offset Overall stability inside the outer box.

The connection between the antifreeze hose and the first hollow interlayer is provided with a first pressurized part, and the connection between the antifreeze hose and the second hollow interlayer is provided with a second pressurization part;

The first hollow interlayer is symmetrically provided with spray holes, and the second hollow interlayer is symmetrically provided with spray holes;

The bottom of the outer box includes a moisture-proof layer, a heat-insulating buffer layer, a first magnet layer, a second magnet layer, an elastomer layer, and a wear-resistant layer. The first magnet layer is arranged on one side of the elastomer layer, The second magnet layer is arranged on the other side of the elastomer layer, the thermal insulation buffer layer is arranged on one side of the first magnet layer and the second magnet layer respectively, and the moisture-proof layer is arranged on the One side of the thermal insulation buffer layer, the wear-resistant layer is arranged on one side of the thermal insulation buffer layer and located at the lower end of the bottom of the outer box. In the present invention, the elastomer layer is a polyolefin elastomer layer in the prior art, and the polyolefin elastomer (Polyolefin Elastomer, POE for short) has excellent elastic properties, and is comparable to traditional chemically cross-linked rubber. Compared with POE, the cost required to obtain elasticity is lower, the weight is lighter, the energy consumption is lower, and it is more friendly to the environment. It has been widely used in auto parts, wires and cables, mechanical tools, household items, toys, entertainment and sporting goods. , soles, seals, hot melt adhesives and other fields. The heat insulation layer is a SiO ₂ airgel heat insulation layer, and the SiO ₂ airgel heat insulation layer can be realized by any existing technology. The moisture-proof layer can be realized by moisture-proof materials in the prior art. Through the setting of the heat insulation layer and the elastomer layer of the outer box, and the positioning and fixing of the foot pads, it can have a good buffering and shock absorption effect; it also has excellent heat preservation and moisture resistance.

In particular, both the first magnet layer and the second magnet layer are permanent magnet layers, and the magnetic properties of the first magnet layer and the second magnet layer repel each other. After being subjected to external pressure, the first magnet layer presses the elastomer layer downwards, and through the repulsive magnetic force between the first magnet layer and the second magnet layer, the elastomer layer is further assisted in rebounding and buffering to optimize the buffering effect.

Particularly, the outer box body is provided with a thermal insulation coating, and the thermal insulation coating is a SiO ₂ airgel thermal insulation coating, and the SiO ₂ airgel thermal insulation coating can pass through Any prior art implementation. It can effectively isolate the external heat, avoid heat transfer with the inside of the box, and effectively extend the heat preservation period.

The fluid pressure at the outlet of the first pressurizing member is 0.5-0.75 times the fluid pressure at the outlet of the second pressurizing member. That is, in the present invention, the fluid pressure from the spray hole of the first hollow interlayer is less than the fluid pressure from the spray hole of the second hollow interlayer, so that the frozen fluid can be fully contacted with the surface of the sample, so that the temperature field in the inner box is more uniform, and the sample is avoided. Only partial freezing occurs, resulting in more uniform freezing and better freezing results.

In particular, the antifreeze hose of the present invention can be realized by any existing technology in the art, and the antifreeze hose can be arranged in the insulation layer of the side box wall of the inner box through the existing technology , and communicate with the first hollow interlayer and the second hollow interlayer respectively.

In the present invention, after the liquid nitrogen device is turned on, the liquid nitrogen fluid enters the first hollow interlayer and the second hollow interlayer respectively through the antifreeze hose, and then sprays the freezing fluid from the upper part and the lower part respectively through the nozzle holes to ensure the freezing of collected samples. Uniformity, effectively improving the shelf life of the samples to be tested.

The horizontal section of the nozzle hole is an isosceles trapezoid. The shape of the spray hole can effectively increase the air pressure of the fluid at the bottom, so that the freezing is more uniform.

In particular, the outer box cover realizes opening and closing connection through the hinge structure in the prior art, and the joint between the outer box cover and the outer box body is provided with a prior art sealing strip to enhance the sealing performance; the inner box cover The opening and closing connection is realized through the hinge structure in the prior art, and the sealing strip of the prior art is provided at the joint between the inner box cover and the inner box body to enhance the sealing performance.

The liquid nitrogen device includes a tank, the tank is provided with an exhaust port, the antifreeze hose is connected to the exhaust port, the exhaust port is provided with a valve assembly, and the valve assembly includes a vent valve, Components such as booster valves can be realized by any existing technology in the art. The lower end of the tank body is provided with a base, and the tank body includes an outer tank body and an inner tank body. The inner tank body is arranged inside the outer tank body. It is characterized in that the lower end of the outer tank body is open, and the inner tank body The upper end of the body is open, and a flexible seal is provided in the tank, one end of the flexible seal is connected to the upper end of the inner tank, and the other end of the flexible seal is connected to the upper end of the inner side of the outer tank;

The lower end of the outer tank is provided with a first connecting portion, the upper end of the base is provided with a second connecting portion, the first connecting portion is a permanent magnet connecting portion, the second connecting portion is a permanent magnet connecting portion, and the The first connecting part is magnetically attracted to the second connecting part, and the first connecting part and the second connecting part are matedly connected;

The inner wall surface of the outer tank body is symmetrically provided with card slots, the card slots are provided with a magnetic adsorption layer, and the outer wall surface of the inner tank body is symmetrically provided with metal barbs, and the card slots cooperate with the metal barbs connect;

In particular, the flexible seal is arranged coaxially with the tank body.

Further, the flexible sealing member is a hollow cylindrical sealing member with concave sides.

In the present invention, when a certain pressure condition is reached, the outer tank body can slide to a certain extent relative to the inner tank body, and the flexible sealing member of the present invention can be stretched to a certain extent, thereby changing the volume of the tank body to reduce the pressure caused by transportation or use. The pressure generated by the increase in the internal pressure of the tank caused by the shaking during the process prolongs the service life of the product. In extreme cases, when the internal pressure of the tank is too high, the outer tank body and the inner tank body can be automatically stretched under the action of pressure to avoid safety hazards caused by excessive internal pressure. The flexible sealing member can connect the upper end of the inner tank body and the inner wall of the inner tank body, so as to realize the airtightness of the seams of the two. The flexible seal can be made of any flexible sealing material, such as plastic, rubber, etc. The metal protrusions on the outside of the inner tank can be embedded in the card slot on the inner wall of the outer tank, and then strengthened and fixed with the magnetic adsorption layer inside the card slot to prevent the retraction of the outer tank and the inner tank, and reduce the pressure on the outer tank and the inner tank. The restoring force between them is against the compression inside the tank. Both the metal protrusion and the card slot can be integrally formed with the inner tank body and the outer tank body through the existing metal processing technology, and the magnetic adsorption layer can be arranged inside the card slot through any existing technology. The lower end of the outer tank body is provided with a first connecting part, and the upper end of the base is provided with a second connecting part, through the magnetic connection between the first connecting part and the second connecting part, the inner tank body and the outer tank body can be further effectively restricted. The sliding direction of the tank body should be avoided to avoid its deflection and damage to the flexible seal, resulting in a decrease in the tightness of the tank body. In particular, under normal conditions, through the magnetic adsorption force of the first connection part and the second connection part, the gravity of the outer tank body, the adsorption force of the metal protrusion and the slot and its inner wall, the outer tank body and the inner tank body A stable equilibrium state can be reached between them, and no deviation will occur. In particular, the present invention is provided with an alarm device at the connection between the first connection part and the second connection part. When the first connection part is separated from the second connection part, the alarm device will give an alarm to remind the operator to pay attention.

Further, the wall of the outer tank body is provided with a metal outer wall, a polymer hydrogel layer, a rubber layer, a capillary layer, an aluminum foil layer, and a metal inner wall in sequence from outside to inside, and the polymer hydrogel layer includes a first A polymer hydrogel layer and a second polymer hydrogel layer, the first polymer hydrogel layer and the second polymer hydrogel layer are symmetrically arranged on both sides of the rubber layer, and the capillary layer runs through The rubber layer connects the first polymer hydrogel layer and the second polymer hydrogel layer, the rubber layer is symmetrically provided with through holes, and the metal inner wall is symmetrically provided with card slots. In particular, the capillary layer and rubber layer described in the present invention can be realized by any existing technology in the art, preferably metal capillary, preferably rubber with a larger elastic modulus as the rubber layer of the present invention; The adhesive layer is wrapped with a polymer film and adhered to the surface of the polymer hydrogel layer through an adhesive. The polymer film can prevent the water leakage and evaporation of the polymer hydrogel.

Preferably, the rubber layer is a thermoplastic elastomer layer, and the thermoplastic elastomer is a material that has the characteristics of high elasticity, high strength, and high resilience of rubber, and can be processed by injection molding. It is environmentally friendly, non-toxic and safe, has a wide range of hardness, excellent colorability, soft touch, weather resistance, fatigue resistance and temperature resistance, excellent processing performance, no need for vulcanization, can be recycled to reduce costs, and can be used for secondary injection molding. It can be coated and bonded with PP, PE, PC, PS, ABS and other base materials, and can also be molded separately, with excellent elastic cushioning performance.

The outer tank body of the present invention can achieve the effect of shock absorption and buffering by sequentially setting the metal outer wall, polymer hydrogel layer, rubber layer, capillary layer, aluminum foil layer, and metal inner wall, avoiding the effect of external stress, and changing the present invention The internal pressure affects its stability. In the present invention, through the uniformly arranged polymer hydrogel layer, when the outer tank body is subjected to external stress from the side, the moisture in the first polymer hydrogel layer enters the second polymer hydrogel layer through the capillary layer, Then, through the pressure difference, the moisture in the second polymer hydrogel layer returns to the first polymer hydrogel layer through the capillary layer to realize buffering. At the same time, it cooperates with the synergistic effect of the rubber layer to achieve the best cushioning effect.

Further, the metal inner wall is any one of 9% Ni steel inner wall, Ni36 Invar alloy inner wall, and 5083 aluminum alloy inner wall. In particular, the inner tank body of the present invention is made of the same material as the metal inner wall. Through the arrangement of the inner tank body and the metal inner wall of the invention, a stable austenite state can be maintained, and the tank size change and the risk of weld cracking caused by high and low temperature environments and temperature difference changes can be resisted, which improves the use and transportation of the invention safety.

In the present invention, the 9%Ni steel inner wall used, wherein 9%Ni steel is a kind of low-carbon quenched and tempered steel containing higher Ni content, it can still maintain good strength, toughness and high strength. There are three main heat treatment methods: normalizing-normalizing-tempering (NNT), and finally tempered martensite and bainite structure, quenching-tempering (QT) and quenching-subtemperature quenching-tempering ( IHT) can get low carbon tempered martensite structure. Different countries have slightly different requirements on the chemical composition and mechanical properties of 9% Ni steel. Its low-temperature mechanical properties mainly depend on its chemical composition, steel purity and structure. It has excellent stability and improves the use safety of the present invention.

The inner wall of the Ni36 Invar alloy is used, and the Ni36 Invar alloy is a face-centered cubic structure containing 36% Ni. It is an iron-based high-nickel alloy with excellent performance and low thermal expansion performance. The temperature changes and its size is basically The Ni-Fe Invar alloy with an average expansion coefficient of 1.6×10 ^-6 /℃ at room temperature and a Ni content of 36% can still maintain a stable austenite state when the temperature is as low as -273℃ . The performance of Invar alloy greatly improves the safety of transportation when it is applied in low temperature environment. The tank made of Invar alloy material can resist the change of tank size and weld cracking caused by high and low temperature environment and temperature difference change Danger, improve the use safety of the present invention.

The inner wall of 5083 aluminum alloy in the present invention has a face-centered cubic structure. Compared with other metals, its mechanical properties do not decrease when the temperature drops, but are enhanced to a certain extent without low-temperature brittleness. Widely used in various industries. The 5083 aluminum alloy for ultra-low temperature is one of the materials used in low-temperature storage tanks. This alloy has the advantages of good plasticity, high strength, corrosion resistance and processability, and improves the safety of transportation and use of the present invention.

Further, the base includes a main body and a second connecting portion symmetrically arranged on the upper end of the main body, and the main body includes a mesh fiber layer, a buffer layer, an antibacterial layer, a waterproof layer, and a bottom plate arranged in sequence.

In the base of the present invention, the mesh fiber layer used is a three-dimensional mesh structure formed by the interweaving of plant fibers and organic fibers in the prior art, and has high elasticity and toughness. The antibacterial layer is the Fe ₃ O ₄ -graphene composite antibacterial layer in the prior art, the waterproof layer is the polyurethane waterproof layer in the prior art, and the bottom plate is the high hardness wood or wood fiber in the prior art bottom plate.

The base of the present invention has excellent anti-seismic cushioning through the effect of the reticular fiber layer and the buffer layer. At the same time, the base plate adopted by the present invention is compared with the metal plate of the prior art, due to the high hardness wood or wood fiber base plate of the present invention. The mesh fiber structure has a certain cushioning effect; through the antibacterial layer and the waterproof layer, it can prevent corrosion and moisture; considering the portability of the present invention, the base of the present invention has the advantage of light weight and will not cause additional burden.

Further, the buffer layer includes an EPE board, a first protrusion, and a second protrusion, the first protrusion is disposed on the EPE board, the second protrusion is disposed on the EPE board, and the The first protruding blocks and the second protruding blocks are oppositely arranged in a staggered manner. In particular, there is a distance between the end of the first protrusion and the EPE plate where the second protrusion is located, and the end of the second protrusion is against the EPE plate described by the first protrusion. In the present invention, the EPE board used in the prior art, EPE (ExpandablePolyethylene), is expandable polyethylene, also known as pearl cotton, which has a non-crosslinked closed-cell structure, and it is mainly made of low-density polyethylene (LDPE). High foam polyethylene products produced by extrusion of raw materials. It is composed of low-density polyethylene fat through physical foaming to produce countless independent bubbles. It overcomes the shortcomings of ordinary styrofoam that are fragile, deformed, and poor in recovery. It has many advantages such as water and moisture resistance, shock resistance, sound insulation, heat preservation, good plasticity, strong toughness, recycling, environmental protection, strong impact resistance, etc., and also has good chemical resistance.

Further, the horizontal section of the first protrusion is an arc, the horizontal section of the second protrusion is an arc, and the arc of the first protrusion is 1.5-2.2 times the arc of the second protrusion .

In the present invention, the first protrusion, the second protrusion, and the EPE plate are made of the same material, and the buffer layer adopted can be used through the function of the first protrusion and the second protrusion of different volumes arranged in opposite directions and staggered. Under the condition of external stress, elastic deformation occurs, and the longitudinal stress received is extended to the lateral direction, and the rebound is realized, so as to achieve the effect of shock absorption and buffering.

Further, the raw materials of the polymer gel layer include 2-6 parts by weight of bisallyl diethylene glycol carbonate, 4-12 parts of acryloyl proline methyl ester, 0.01-0.19 parts of non-ionic fiber Plain ether, 0.5-2 parts of maleic anhydride, 0.3-1.5 parts of potassium persulfate, 0.01-0.07 parts of trihydroxyglutaric acid, 0.02-0.05 parts of cerium hydroxide and 90-100 parts of pure water. In the present invention, the raw materials such as bisallyl diethylene glycol carbonate and acryloyl proline methyl ester can be realized by using existing technologies. The nonionic cellulose ether can be any one of hydroxypropylmethyl cellulose ether and hydroxypropyl cellulose ether or a mixture thereof. Maleic anhydride is also known as maleic anhydride or dehydrated malic anhydride, often referred to as maleic anhydride. Potassium persulfate, inorganic compound, white crystal. Maleic anhydride and potassium persulfate can promote the polymerization and crosslinking of bisallyl carbonate and non-ionic cellulose ether, so that it can be combined with pure water to form a hydrogel. 3-Hydroxy glutaric acid (3-Hydroxy glutaric acid) is usually used in organic synthesis and pharmaceutical intermediates, which can be realized by using commercially available products. Cerium hydroxide is often used in the principle of cerium nitrate synthesis. In the present invention, trihydroxyglutaric acid and cerium hydroxide are especially added. When the two exist, the stability of water in the polymer hydrogel system at low temperature can be improved, and a large amount of water will be released at about 50°C to achieve rapid Cool down and have a certain buffering effect.

Further, the raw materials of the flexible sealing member include 70-90 parts by weight of polyvinyl chloride, 0.1-0.3 parts of nano-alumina, 2-6 parts of tris(dimethylamino)silane, 1-10 parts of coupling agent .

Polyvinyl chloride, English abbreviation PVC (Polyvinyl chloride), is a vinyl chloride monomer (vinyl chloridemonomer, referred to as VCM) in peroxides, azo compounds and other initiators; or under the action of light and heat, it can be polymerized according to the mechanism of free radical polymerization. made polymer. The nano-alumina is preferably in the γ crystal form, and the particle size is preferably 10-50nm. Tris(dimethylamino)silane (CAS number: 15112-89-7) can be realized by using commercially available products. The coupling agent can be realized by using existing technology, and its function is to enhance the composite strength of nano-alumina and polyvinyl chloride. The present invention particularly selects polyvinyl chloride as the flexible seal, and the flexible seal is easily cracked due to abrasion after being in a bent state for a long time, which affects the airtightness. The present invention adds a proper amount of nano-alumina and tris(dimethylamino)silane to fill the polyvinyl chloride, which can significantly improve the wear resistance of the flexible sealing member without significantly reducing its softness, thereby improving the reliability of the present invention.

The present invention can provide a stable guarantee for the transportation, carrying and use of the present invention through the structure with a buffering effect arranged between the liquid nitrogen device, the outer box, the inner box and the outer box, and avoid the shaking of the liquid nitrogen device due to vibration Cause safety hazards such as internal pressure instability. The freezing method of the refrigerator of the present invention can make the temperature field in the inner box more uniform, and the liquid nitrogen is used as the freezing source, so that the inner box contains a higher concentration of nitrogen, which can play a better role in air conditioning.

The invention provides a frozen storage device for test samples, which is safe, stable, portable, and easy to use, and is suitable for use as a cold storage container for collecting samples during outdoor sampling. The invention can store samples for 1-7 days without being connected to a power source.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a partial structural diagram of the present invention;

Fig. 3 is a partial structural diagram of the present invention;

Fig. 4 is a partial structural diagram of the present invention;

Fig. 5 is a partial structural diagram of the present invention;

Fig. 6 is a partial structural diagram of the present invention;

Fig. 7 is a partial structural diagram of the present invention;

Fig. 8 is a partial structural diagram of the present invention.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments:

Example 1

A test sample freezing storage device, comprising a box body and an antifreeze hose 4, the box body includes an outer box body 1 and an inner box body 2, the inner box body 2 is arranged inside the outer box body 1, and The feature is that the outer box 1 is also provided with a liquid nitrogen device 3, and the liquid nitrogen device 3 is arranged on one side of the inner box 2;

The outer box body 1 is provided with an outer box cover 11, and the inner side of the outer box cover 11 is symmetrically provided with elastic bodies 12 and magnetic blocks 13;

The inner box body 2 is provided with an inner box cover 20, the elastic body 12 is against the outer side of the inner box cover 20, and the magnetic block 13 is connected to the outer side of the inner box cover 20;

The wall of the inner box body 2 is provided with an insulating layer 21 and a waterproof layer 22, and the waterproof layer 22 is symmetrically arranged on both sides of the insulating layer 21, and the inner box cover 20 is provided with a metal layer 25 and an insulating layer in turn. 21. Waterproof layer 22, first hollow interlayer 23, the bottom surface of the box is also provided with a second hollow interlayer 24, and the liquid nitrogen device 3 is respectively connected to the first hollow interlayer 23, the second hollow interlayer 2 through the antifreeze hose 4 The hollow interlayer 24 is connected; the structure of the inner box 2 in the present invention can provide an effective thermal insulation environment for collecting samples, and has good waterproof performance at the same time.

In the present invention, the use of elastic body 12 and magnetic block 13 can be realized by any prior art, and outer box body 1 and inner box body 2 are closely matched at the upper end by elastic body 12 and magnetic block 13, when closing outer box cover 11 Finally, the elastic body 12 is in contact with the surface of the inner box cover 20, which can buffer the force on the surface of the box body; the magnetic block 13 can be adsorbed by the metal layer 25 of the inner box body 2 to limit the inner box body. The position of the body 2 prevents the deviation of the inner box 2 from affecting the overall stability of the outer box 1 .

The connection between the antifreeze hose and the first hollow interlayer is provided with a first pressurization member 41, and the connection between the antifreeze hose and the second hollow interlayer is provided with a second pressurization member 42;

The first hollow interlayer 23 is symmetrically provided with nozzle holes 25, and the second hollow interlayer 24 is symmetrically provided with nozzle holes 25;

In particular, the antifreeze hose 4 of the present invention can be realized by any existing technology in the art, and the antifreeze hose 4 can be arranged on the side wall of the inner box body 2 through the existing technology. The insulation layer 21 communicates with the first hollow interlayer 23 and the second hollow interlayer 24 respectively.

The horizontal section of the nozzle hole 25 is an isosceles trapezoid. The shape of the spray holes 25 can effectively increase the air pressure of the fluid at the bottom, making the freezing more uniform.

In particular, the outer box cover 11 realizes the opening and closing connection through the hinge structure in the prior art, and the joint between the outer box cover 11 and the outer box body 1 is provided with a prior art sealing strip to enhance the sealing performance; The inner box cover 20 realizes opening and closing connection through the hinge structure in the prior art, and the sealing strip of the prior art is provided at the joint between the inner box cover 20 and the inner box body 2 to enhance the sealing performance.

The bottom 14 of the outer box body includes a moisture-proof layer 141, a thermal insulation buffer layer 142, a first magnet layer 143, a second magnet layer 145, an elastomer layer 144, and a wear-resistant layer 146. The first magnet layer is located on the One side of the elastomer layer, the second magnet layer is arranged on the other side of the elastomer layer, and the thermal insulation buffer layer is respectively arranged on one side of the first magnet layer and the second magnet layer, so The moisture-proof layer is arranged on one side of the heat insulation buffer layer, and the wear-resistant layer is arranged on one side of the heat insulation buffer layer and is located at the lower end of the bottom of the outer box.

The fluid pressure at the outlet of the first pressurizing member 41 is 0.68 times the fluid pressure at the outlet of the second pressurizing member 42 .

Both the first magnet layer 143 and the second magnet layer 145 are permanent magnet layers, and the magnetic properties of the first magnet layer and the second magnet layer repel each other.

Particularly, described outer box body 1 is provided with heat-insulating exterior and is provided with heat-insulating coating, and described heat-insulating coating is SiO ₂ airgel heat-insulating coating, and described SiO ₂ airgel heat-insulating coating can be Achieved by any existing technology. It can effectively isolate the external heat, avoid heat transfer with the inside of the box, and effectively extend the heat preservation period.

The liquid nitrogen device 3 includes a tank, the tank is provided with an exhaust port, the antifreeze hose 4 is connected to the exhaust port, the exhaust port is provided with a valve assembly, and the valve assembly includes a vent Valves, booster valves and other components can be realized by any existing technology in this field. The lower end of the tank body is provided with a base, and the tank body includes an outer tank body and an inner tank body. The inner tank body is arranged inside the outer tank body. It is characterized in that the lower end of the outer tank body is open, and the inner tank body The upper end of the body is open, and a flexible seal is provided in the tank, one end of the flexible seal is connected to the upper end of the inner tank, and the other end of the flexible seal is connected to the upper end of the inner side of the outer tank;

The lower end of the outer tank is provided with a first connecting portion, the upper end of the base is provided with a second connecting portion, the first connecting portion is a permanent magnet connecting portion, the second connecting portion is a permanent magnet connecting portion, and the The first connecting part is magnetically attracted to the second connecting part, and the first connecting part and the second connecting part are matedly connected;

The inner wall surface of the outer tank body is symmetrically provided with card slots, the card slots are provided with a magnetic adsorption layer, and the outer wall surface of the inner tank body is symmetrically provided with metal barbs, and the card slots cooperate with the metal barbs connect;

In particular, the flexible seal is arranged coaxially with the tank body.

Further, the flexible sealing member is a hollow cylindrical sealing member with concave sides.

In the present invention, when a certain pressure condition is reached, the outer tank body can slide to a certain extent relative to the inner tank body, and the flexible sealing member of the present invention can be stretched to a certain extent, thereby changing the volume of the tank body to reduce the pressure caused by transportation or use. The pressure generated by the increase in the internal pressure of the tank caused by the shaking during the process prolongs the service life of the product. In extreme cases, when the internal pressure of the tank is too high, the outer tank body and the inner tank body can be automatically stretched under the action of pressure to avoid safety hazards caused by excessive internal pressure. The flexible sealing member can connect the upper end of the inner tank body and the inner wall of the inner tank body, so as to realize the airtightness of the seams of the two. The flexible seal can be made of any flexible sealing material, such as plastic, rubber, etc. The metal protrusions on the outside of the inner tank can be embedded in the card slot on the inner wall of the outer tank, and then strengthened and fixed with the magnetic adsorption layer inside the card slot to prevent the retraction of the outer tank and the inner tank, and reduce the pressure on the outer tank and the inner tank. The restoring force between them is against the compression inside the tank. Both the metal protrusion and the card slot can be integrally formed with the inner tank body and the outer tank body through the existing metal processing technology, and the magnetic adsorption layer can be arranged inside the card slot through any existing technology. The lower end of the outer tank body is provided with a first connecting part, and the upper end of the base is provided with a second connecting part, through the magnetic connection between the first connecting part and the second connecting part, the inner tank body and the outer tank body can be further effectively restricted. The sliding direction of the tank body should be avoided to avoid its deflection and damage to the flexible seal, resulting in a decrease in the tightness of the tank body. In particular, under normal conditions, through the magnetic adsorption force of the first connection part and the second connection part, the gravity of the outer tank body, the adsorption force of the metal protrusion and the slot and its inner wall, the outer tank body and the inner tank body A stable equilibrium state can be reached between them, and no deviation will occur. In particular, the present invention is provided with an alarm device at the connection between the first connection part and the second connection part. When the first connection part is separated from the second connection part, the alarm device will give an alarm to remind the operator to pay attention.

Further, the wall of the outer tank body is provided with a metal outer wall, a polymer hydrogel layer, a rubber layer, a capillary layer, an aluminum foil layer, and a metal inner wall in sequence from outside to inside, and the polymer hydrogel layer includes a first A polymer hydrogel layer and a second polymer hydrogel layer, the first polymer hydrogel layer and the second polymer hydrogel layer are symmetrically arranged on both sides of the rubber layer, and the capillary layer runs through The rubber layer connects the first polymer hydrogel layer and the second polymer hydrogel layer, the rubber layer is symmetrically provided with through holes 53 , and the metal inner wall is symmetrically provided with card slots. In particular, the capillary layer and rubber layer described in the present invention can be realized by any existing technology in the art, preferably metal capillary, preferably rubber with a larger elastic modulus as the rubber layer of the present invention; The adhesive layer is wrapped with a polymer film and adhered to the surface of the polymer hydrogel layer through an adhesive. The polymer film can prevent the water leakage and evaporation of the polymer hydrogel.

Preferably, the rubber layer is a thermoplastic elastomer layer 143 , and the thermoplastic elastomer 12 is a material that has the high elasticity, high strength, and high resilience of rubber, and can be processed by injection molding. It is environmentally friendly, non-toxic and safe, has a wide range of hardness, excellent colorability, soft touch, weather resistance, fatigue resistance and temperature resistance, excellent processing performance, no need for vulcanization, can be recycled to reduce costs, and can be used for secondary injection molding. It can be coated and bonded with PP, PE, PC, PS, ABS and other base materials, and can also be molded separately, with excellent elastic cushioning performance.

The outer tank body of the present invention can achieve the effect of shock absorption and buffering by sequentially setting the metal outer wall, polymer hydrogel layer, rubber layer, capillary layer, aluminum foil layer, and metal inner wall, avoiding the effect of external stress, and changing the present invention The internal pressure affects its stability. In the present invention, through the uniformly arranged polymer hydrogel layer, when the outer tank body is subjected to external stress from the side, the moisture in the first polymer hydrogel layer enters the second polymer hydrogel layer through the capillary layer, Then, through the pressure difference, the moisture in the second polymer hydrogel layer returns to the first polymer hydrogel layer through the capillary layer to realize buffering. At the same time, it cooperates with the synergistic effect of the rubber layer to achieve the best cushioning effect.

Further, the metal inner wall is a 9% Ni steel inner wall. In particular, the inner tank body of the present invention is made of the same material as the metal inner wall. Through the arrangement of the inner tank body and the metal inner wall of the invention, a stable austenite state can be maintained, and the tank size change and the risk of weld cracking caused by high and low temperature environments and temperature difference changes can be resisted, which improves the use and transportation of the invention safety.

In the present invention, the 9%Ni steel inner wall used, wherein 9%Ni steel is a kind of low-carbon quenched and tempered steel containing higher Ni content, it can still maintain good strength, toughness and high strength. There are three main heat treatment methods: normalizing-normalizing-tempering (NNT), and finally tempered martensite and bainite structure, quenching-tempering (QT) and quenching-subtemperature quenching-tempering ( IHT) can get low carbon tempered martensite structure. Different countries have slightly different requirements on the chemical composition and mechanical properties of 9% Ni steel. Its low-temperature mechanical properties mainly depend on its chemical composition, steel purity and structure. It has excellent stability and improves the use safety of the present invention.

Further, the base includes a main body and a second connecting portion symmetrically arranged on the upper end of the main body, and the main body includes a mesh fiber layer, a buffer layer, an antibacterial layer, a waterproof layer 22 and a bottom plate arranged in sequence.

In the base of the present invention, the mesh fiber layer used is a three-dimensional mesh structure formed by the interweaving of plant fibers and organic fibers in the prior art, and has high elasticity and toughness. The antibacterial layer is the Fe ₃ O ₄ -graphene composite antibacterial layer in the prior art, the waterproof layer 22 is the polyurethane waterproof layer 22 in the prior art, and the base plate is high hardness wood or Wood fiber base.

The base of the present invention has excellent anti-seismic cushioning through the effect of the reticular fiber layer and the buffer layer. At the same time, the base plate adopted by the present invention is compared with the metal plate of the prior art, due to the high hardness wood or wood fiber base plate of the present invention. The mesh fiber structure has a certain buffering effect; through the antibacterial layer and the waterproof layer 22, it can prevent corrosion and moisture; considering the portability of the present invention, the base of the present invention has the advantage of light weight and will not cause additional burden.

Further, the buffer layer includes an EPE board, a first protrusion, and a second protrusion, the first protrusion is disposed on the EPE board, the second protrusion is disposed on the EPE board, and the The first protruding blocks and the second protruding blocks are oppositely arranged in a staggered manner. In particular, there is a distance between the end of the first protrusion and the EPE plate where the second protrusion is located, and the end of the second protrusion is against the EPE plate described by the first protrusion. In the present invention, the EPE board used in the prior art, EPE (ExpandablePolyethylene), is expandable polyethylene, also known as pearl cotton, which has a non-crosslinked closed-cell structure, and it is mainly made of low-density polyethylene (LDPE). High foam polyethylene products produced by extrusion of raw materials. It is composed of low-density polyethylene fat through physical foaming to produce countless independent bubbles. It overcomes the shortcomings of ordinary styrofoam that are fragile, deformed, and poor in recovery. It has many advantages such as water and moisture resistance, shock resistance, sound insulation, heat preservation, good plasticity, strong toughness, recycling, environmental protection, strong impact resistance, etc., and also has good chemical resistance.

Further, the horizontal section of the first protrusion is an arc, the horizontal section of the second protrusion is an arc, and the arc of the first protrusion is twice the arc of the second protrusion.

In the present invention, the first protrusion, the second protrusion, and the EPE plate are made of the same material, and the buffer layer adopted can be used through the function of the first protrusion and the second protrusion of different volumes arranged in opposite directions and staggered. Under the condition of external stress, elastic deformation occurs, and the longitudinal stress received is extended to the lateral direction, and the rebound is realized, so as to achieve the effect of shock absorption and buffering.

The present invention can provide a stable guarantee for the transportation, carrying and use of the present invention through the buffer structure provided between the liquid nitrogen device 3, the outer box 1, the inner box 2 and the outer box 1, and avoid liquid nitrogen Device 3 has potential safety hazards such as internal pressure instability due to vibration and shaking. The freezing method of the refrigerator of the present invention can make the temperature field in the inner box 2 more uniform, and use liquid nitrogen as the freezing source, so that the inner box 2 contains a higher concentration of nitrogen, which can play a better role in air conditioning.

The invention provides a detection sample freezing storage device, which is safe, stable, convenient to carry and easy to use, and is suitable for being used as a cold storage container for collecting samples during the outdoor sampling process.

Example 2

A test sample freezing storage device, comprising a box body and an antifreeze hose 4, the box body includes an outer box body 1 and an inner box body 2, the inner box body 2 is arranged inside the outer box body 1, and The feature is that the outer box 1 is also provided with a liquid nitrogen device 3, and the liquid nitrogen device 3 is arranged on one side of the inner box 2;

The outer box body 1 is provided with an outer box cover 11, and the inner side of the outer box cover 11 is symmetrically provided with elastic bodies 12 and magnetic blocks 13;

The inner box body 2 is provided with an inner box cover 20, the elastic body 12 is against the outer side of the inner box cover 20, and the magnetic block 13 is connected to the outer side of the inner box cover 20;

The wall of the inner box body 2 is provided with an insulating layer 21 and a waterproof layer 22, and the waterproof layer 22 is symmetrically arranged on both sides of the insulating layer 21, and the inner box cover 20 is provided with a metal layer 25 and an insulating layer in turn. 21. Waterproof layer 22, first hollow interlayer 23, the bottom surface of the box is also provided with a second hollow interlayer 24, and the liquid nitrogen device 3 is respectively connected to the first hollow interlayer 23, the second hollow interlayer 2 through the antifreeze hose 4 The hollow interlayer 24 is connected; the structure of the inner box 2 in the present invention can provide an effective thermal insulation environment for collecting samples, and has good waterproof performance at the same time.

In the present invention, the use of elastic body 12 and magnetic block 13 can be realized by any prior art, and outer box body 1 and inner box body 2 are closely matched at the upper end by elastic body 12 and magnetic block 13, when closing outer box cover 11 Finally, the elastic body 12 is in contact with the surface of the inner box cover 20, which can buffer the force on the surface of the box body; the magnetic block 13 can be adsorbed by the metal layer 25 of the inner box body 2 to limit the inner box body. The position of the body 2 prevents the deviation of the inner box 2 from affecting the overall stability of the outer box 1 .

The connection between the antifreeze hose and the first hollow interlayer is provided with a first pressurization member 41, and the connection between the antifreeze hose and the second hollow interlayer is provided with a second pressurization member 42;

The first hollow interlayer 23 is symmetrically provided with nozzle holes 25, and the second hollow interlayer 24 is symmetrically provided with nozzle holes 25;

In particular, the antifreeze hose 4 of the present invention can be realized by any existing technology in the art, and the antifreeze hose 4 can be arranged on the side wall of the inner box body 2 through the existing technology. The insulation layer 21 communicates with the first hollow interlayer 23 and the second hollow interlayer 24 respectively.

The horizontal section of the nozzle hole 25 is an isosceles trapezoid. The shape of the spray holes 25 can effectively increase the air pressure of the fluid at the bottom, making the freezing more uniform.

In particular, the outer box cover 11 realizes the opening and closing connection through the hinge structure in the prior art, and the joint between the outer box cover 11 and the outer box body 1 is provided with a prior art sealing strip to enhance the sealing performance; The inner box cover 20 realizes opening and closing connection through the hinge structure in the prior art, and the sealing strip of the prior art is provided at the joint between the inner box cover 20 and the inner box body 2 to enhance the sealing performance.

The bottom 14 of the outer box body includes a moisture-proof layer 141, a thermal insulation buffer layer 142, a first magnet layer 143, a second magnet layer 145, an elastomer layer 144, and a wear-resistant layer 146. The first magnet layer is located on the One side of the elastomer layer, the second magnet layer is arranged on the other side of the elastomer layer, and the thermal insulation buffer layer is respectively arranged on one side of the first magnet layer and the second magnet layer, so The moisture-proof layer is arranged on one side of the heat insulation buffer layer, and the wear-resistant layer is arranged on one side of the heat insulation buffer layer and is located at the lower end of the bottom of the outer box.

The fluid pressure at the outlet of the first pressurizing member 41 is 0.75 times the fluid pressure at the outlet of the second pressurizing member 42 .

Both the first magnet layer 143 and the second magnet layer 145 are permanent magnet layers, and the magnetic properties of the first magnet layer and the second magnet layer repel each other.

Particularly, described outer box body 1 is provided with heat-insulating exterior and is provided with heat-insulating coating, and described heat-insulating coating is SiO ₂ airgel heat-insulating coating, and described SiO ₂ airgel heat-insulating coating can be Achieved by any existing technology. It can effectively isolate the external heat, avoid heat transfer with the inside of the box, and effectively extend the heat preservation period.

The liquid nitrogen device 3 includes a tank, the tank is provided with an exhaust port, the antifreeze hose 4 is connected to the exhaust port, the exhaust port is provided with a valve assembly, and the valve assembly includes a vent Valves, booster valves and other components can be realized by any existing technology in this field. The lower end of the tank body is provided with a base, and the tank body includes an outer tank body and an inner tank body. The inner tank body is arranged inside the outer tank body. It is characterized in that the lower end of the outer tank body is open, and the inner tank body The upper end of the body is open, and a flexible seal is provided in the tank, one end of the flexible seal is connected to the upper end of the inner tank, and the other end of the flexible seal is connected to the upper end of the inner side of the outer tank;

The lower end of the outer tank is provided with a first connecting portion, the upper end of the base is provided with a second connecting portion, the first connecting portion is a permanent magnet connecting portion, the second connecting portion is a permanent magnet connecting portion, and the The first connecting part is magnetically attracted to the second connecting part, and the first connecting part and the second connecting part are matedly connected;

The inner wall surface of the outer tank body is symmetrically provided with card slots, the card slots are provided with a magnetic adsorption layer, and the outer wall surface of the inner tank body is symmetrically provided with metal barbs, and the card slots cooperate with the metal barbs connect;

In particular, the flexible seal is arranged coaxially with the tank body.

Further, the flexible sealing member is a hollow cylindrical sealing member with concave sides.

In the present invention, when a certain pressure condition is reached, the outer tank body can slide to a certain extent relative to the inner tank body, and the flexible sealing member of the present invention can be stretched to a certain extent, thereby changing the volume of the tank body to reduce the pressure caused by transportation or use. The pressure generated by the increase in the internal pressure of the tank caused by the shaking during the process prolongs the service life of the product. In extreme cases, when the internal pressure of the tank is too high, the outer tank body and the inner tank body can be automatically stretched under the action of pressure to avoid safety hazards caused by excessive internal pressure. The flexible sealing member can connect the upper end of the inner tank body and the inner wall of the inner tank body, so as to realize the airtightness of the seams of the two. The flexible seal can be made of any flexible sealing material, such as plastic, rubber, etc. The metal protrusions on the outside of the inner tank can be embedded in the card slot on the inner wall of the outer tank, and then strengthened and fixed with the magnetic adsorption layer inside the card slot to prevent the retraction of the outer tank and the inner tank, and reduce the pressure on the outer tank and the inner tank. The restoring force between them is against the compression inside the tank. Both the metal protrusion and the card slot can be integrally formed with the inner tank body and the outer tank body through the existing metal processing technology, and the magnetic adsorption layer can be arranged inside the card slot through any existing technology. The lower end of the outer tank body is provided with a first connecting part, and the upper end of the base is provided with a second connecting part, through the magnetic connection between the first connecting part and the second connecting part, the inner tank body and the outer tank body can be further effectively restricted. The sliding direction of the tank body should be avoided to avoid its deflection and damage to the flexible seal, resulting in a decrease in the tightness of the tank body. In particular, under normal conditions, through the magnetic adsorption force of the first connection part and the second connection part, the gravity of the outer tank body, the adsorption force of the metal protrusion and the slot and its inner wall, the outer tank body and the inner tank body A stable equilibrium state can be reached between them, and no deviation will occur. In particular, the present invention is provided with an alarm device at the connection between the first connection part and the second connection part. When the first connection part is separated from the second connection part, the alarm device will give an alarm to remind the operator to pay attention.

Further, the wall of the outer tank body is provided with a metal outer wall, a polymer hydrogel layer, a rubber layer, a capillary layer, an aluminum foil layer, and a metal inner wall in sequence from outside to inside, and the polymer hydrogel layer includes a first A polymer hydrogel layer and a second polymer hydrogel layer, the first polymer hydrogel layer and the second polymer hydrogel layer are symmetrically arranged on both sides of the rubber layer, and the capillary layer runs through The rubber layer connects the first polymer hydrogel layer and the second polymer hydrogel layer, the rubber layer is symmetrically provided with through holes 53 , and the metal inner wall is symmetrically provided with card slots. In particular, the capillary layer and rubber layer described in the present invention can be realized by any existing technology in the art, preferably metal capillary, preferably rubber with a larger elastic modulus as the rubber layer of the present invention; The adhesive layer is wrapped with a polymer film and adhered to the surface of the polymer hydrogel layer through an adhesive. The polymer film can prevent the water leakage and evaporation of the polymer hydrogel.

Preferably, the rubber layer is a thermoplastic elastomer layer 143 , and the thermoplastic elastomer 12 is a material that has the high elasticity, high strength, and high resilience of rubber, and can be processed by injection molding. It is environmentally friendly, non-toxic and safe, has a wide range of hardness, excellent colorability, soft touch, weather resistance, fatigue resistance and temperature resistance, excellent processing performance, no need for vulcanization, can be recycled to reduce costs, and can be used for secondary injection molding. It can be coated and bonded with PP, PE, PC, PS, ABS and other base materials, and can also be molded separately, with excellent elastic cushioning performance.

The outer tank body of the present invention can achieve the effect of shock absorption and buffering by sequentially setting the metal outer wall, polymer hydrogel layer, rubber layer, capillary layer, aluminum foil layer, and metal inner wall, avoiding the effect of external stress, and changing the present invention The internal pressure affects its stability. In the present invention, through the uniformly arranged polymer hydrogel layer, when the outer tank body is subjected to external stress from the side, the moisture in the first polymer hydrogel layer enters the second polymer hydrogel layer through the capillary layer, Then, through the pressure difference, the moisture in the second polymer hydrogel layer returns to the first polymer hydrogel layer through the capillary layer to realize buffering. At the same time, it cooperates with the synergistic effect of the rubber layer to achieve the best cushioning effect.

Further, the metal inner wall 316 is an inner wall of Ni36 Invar alloy.

The inner wall of the Ni36 Invar alloy is used, and the Ni36 Invar alloy is a face-centered cubic structure containing 36% Ni. It is an iron-based high-nickel alloy with excellent performance and low thermal expansion performance. The temperature changes and its size is basically The Ni-Fe Invar alloy with an average expansion coefficient of 1.6×10 ^-6 /℃ at room temperature and a Ni content of 36% can still maintain a stable austenite state when the temperature is as low as -273℃ . The performance of Invar alloy greatly improves the safety of transportation when it is applied in low temperature environment. The tank made of Invar alloy material can resist the change of tank size and weld cracking caused by high and low temperature environment and temperature difference change Danger, improve the use safety of the present invention.

Further, the base includes a main body and a second connecting portion symmetrically arranged on the upper end of the main body, and the main body includes a mesh fiber layer, a buffer layer, an antibacterial layer, a waterproof layer 22 and a bottom plate arranged in sequence.

In the base of the present invention, the mesh fiber layer used is a three-dimensional mesh structure formed by the interweaving of plant fibers and organic fibers in the prior art, and has high elasticity and toughness. The antibacterial layer is the Fe ₃ O ₄ -graphene composite antibacterial layer in the prior art, the waterproof layer 22 is the polyurethane waterproof layer 22 in the prior art, and the base plate is high hardness wood or Wood fiber base.

The base of the present invention has excellent anti-seismic cushioning through the effect of the reticular fiber layer and the buffer layer. At the same time, the base plate adopted by the present invention is compared with the metal plate of the prior art, due to the high hardness wood or wood fiber base plate of the present invention. The mesh fiber structure has a certain buffering effect; through the antibacterial layer and the waterproof layer 22, it can prevent corrosion and moisture; considering the portability of the present invention, the base of the present invention has the advantage of light weight and will not cause additional burden.

Further, the buffer layer includes an EPE board, a first protrusion, and a second protrusion, the first protrusion is disposed on the EPE board, the second protrusion is disposed on the EPE board, and the The first protruding blocks and the second protruding blocks are oppositely arranged in a staggered manner. In particular, there is a distance between the end of the first protrusion and the EPE plate where the second protrusion is located, and the end of the second protrusion is against the EPE plate described by the first protrusion. In the present invention, the EPE board used in the prior art, EPE (ExpandablePolyethylene), is expandable polyethylene, also known as pearl cotton, which has a non-crosslinked closed-cell structure, and it is mainly made of low-density polyethylene (LDPE). High foam polyethylene products produced by extrusion of raw materials. It is composed of low-density polyethylene fat through physical foaming to produce countless independent bubbles. It overcomes the shortcomings of ordinary styrofoam that are fragile, deformed, and poor in recovery. It has many advantages such as water and moisture resistance, shock resistance, sound insulation, heat preservation, good plasticity, strong toughness, recycling, environmental protection, strong impact resistance, etc., and also has good chemical resistance.

Further, the horizontal section of the first protrusion is an arc, the horizontal section of the second protrusion is an arc, and the arc of the first protrusion is 2.2 times the arc of the second protrusion.

In the present invention, the first protrusion, the second protrusion, and the EPE plate are made of the same material, and the buffer layer adopted can be used through the function of the first protrusion and the second protrusion of different volumes arranged in opposite directions and staggered. Under the condition of external stress, elastic deformation occurs, and the longitudinal stress received is extended to the lateral direction, and the rebound is realized, so as to achieve the effect of shock absorption and buffering.

The present invention can provide a stable guarantee for the transportation, carrying and use of the present invention through the buffer structure provided between the liquid nitrogen device 3, the outer box 1, the inner box 2 and the outer box 1, and avoid liquid nitrogen Device 3 has potential safety hazards such as internal pressure instability due to vibration and shaking. The freezing method of the refrigerator of the present invention can make the temperature field in the inner box 2 more uniform, and use liquid nitrogen as the freezing source, so that the inner box 2 contains a higher concentration of nitrogen, which can play a better role in air conditioning.

The invention provides a detection sample freezing storage device, which is safe, stable, convenient to carry and easy to use, and is suitable for being used as a cold storage container for collecting samples during the outdoor sampling process.

Example 3

A test sample freezing storage device, comprising a box body and an antifreeze hose 4, the box body includes an outer box body 1 and an inner box body 2, the inner box body 2 is arranged inside the outer box body 1, and The feature is that the outer box 1 is also provided with a liquid nitrogen device 3, and the liquid nitrogen device 3 is arranged on one side of the inner box 2;

The outer box body 1 is provided with an outer box cover 11, and the inner side of the outer box cover 11 is symmetrically provided with elastic bodies 12 and magnetic blocks 13;

The inner box body 2 is provided with an inner box cover 20, the elastic body 12 is against the outer side of the inner box cover 20, and the magnetic block 13 is connected to the outer side of the inner box cover 20;

The wall of the inner box body 2 is provided with an insulating layer 21 and a waterproof layer 22, and the waterproof layer 22 is symmetrically arranged on both sides of the insulating layer 21, and the inner box cover 20 is provided with a metal layer 25 and an insulating layer in turn. 21. Waterproof layer 22, first hollow interlayer 23, the bottom surface of the box is also provided with a second hollow interlayer 24, and the liquid nitrogen device 3 is respectively connected to the first hollow interlayer 23, the second hollow interlayer 2 through the antifreeze hose 4 The hollow interlayer 24 is connected; the structure of the inner box 2 in the present invention can provide an effective thermal insulation environment for collecting samples, and has good waterproof performance at the same time.

In the present invention, the use of elastic body 12 and magnetic block 13 can be realized by any prior art, and outer box body 1 and inner box body 2 are closely matched at the upper end by elastic body 12 and magnetic block 13, when closing outer box cover 11 Finally, the elastic body 12 is in contact with the surface of the inner box cover 20, which can buffer the force on the surface of the box body; the magnetic block 13 can be adsorbed by the metal layer 25 of the inner box body 2 to limit the inner box body. The position of the body 2 prevents the deviation of the inner box 2 from affecting the overall stability of the outer box 1 .

The connection between the antifreeze hose and the first hollow interlayer is provided with a first pressurization member 41, and the connection between the antifreeze hose and the second hollow interlayer is provided with a second pressurization member 42;

The first hollow interlayer 23 is symmetrically provided with nozzle holes 25, and the second hollow interlayer 24 is symmetrically provided with nozzle holes 25;

In particular, the antifreeze hose 4 of the present invention can be realized by any existing technology in the art, and the antifreeze hose 4 can be arranged on the side wall of the inner box body 2 through the existing technology. The insulation layer 21 communicates with the first hollow interlayer 23 and the second hollow interlayer 24 respectively.

The horizontal section of the nozzle hole 25 is an isosceles trapezoid. The shape of the spray holes 25 can effectively increase the air pressure of the fluid at the bottom, making the freezing more uniform.

In particular, the outer box cover 11 realizes the opening and closing connection through the hinge structure in the prior art, and the joint between the outer box cover 11 and the outer box body 1 is provided with a prior art sealing strip to enhance the sealing performance; The inner box cover 20 realizes opening and closing connection through the hinge structure in the prior art, and the sealing strip of the prior art is provided at the joint between the inner box cover 20 and the inner box body 2 to enhance the sealing performance.

The bottom 14 of the outer box body includes a moisture-proof layer 141, a thermal insulation buffer layer 142, a first magnet layer 143, a second magnet layer 145, an elastomer layer 144, and a wear-resistant layer 146. The first magnet layer is located on the One side of the elastomer layer, the second magnet layer is arranged on the other side of the elastomer layer, and the thermal insulation buffer layer is respectively arranged on one side of the first magnet layer and the second magnet layer, so The moisture-proof layer is arranged on one side of the heat insulation buffer layer, and the wear-resistant layer is arranged on one side of the heat insulation buffer layer and is located at the lower end of the bottom of the outer box.

The fluid pressure at the outlet of the first pressurizing member 41 is 0.5 times the fluid pressure at the outlet of the second pressurizing member 42 .

Both the first magnet layer 143 and the second magnet layer 145 are permanent magnet layers, and the magnetic properties of the first magnet layer and the second magnet layer repel each other.

Particularly, described outer box body 1 is provided with heat-insulating exterior and is provided with heat-insulating coating, and described heat-insulating coating is SiO ₂ airgel heat-insulating coating, and described SiO ₂ airgel heat-insulating coating can be Achieved by any existing technology. It can effectively isolate the external heat, avoid heat transfer with the inside of the box, and effectively extend the heat preservation period.

The liquid nitrogen device 3 includes a tank, the tank is provided with an exhaust port, the antifreeze hose 4 is connected to the exhaust port, the exhaust port is provided with a valve assembly, and the valve assembly includes a vent Valves, booster valves and other components can be realized by any existing technology in this field. The lower end of the tank body is provided with a base, and the tank body includes an outer tank body and an inner tank body. The inner tank body is arranged inside the outer tank body. It is characterized in that the lower end of the outer tank body is open, and the inner tank body The upper end of the body is open, and a flexible seal is provided in the tank, one end of the flexible seal is connected to the upper end of the inner tank, and the other end of the flexible seal is connected to the upper end of the inner side of the outer tank;

The lower end of the outer tank is provided with a first connecting portion, the upper end of the base is provided with a second connecting portion, the first connecting portion is a permanent magnet connecting portion, the second connecting portion is a permanent magnet connecting portion, and the The first connecting part is magnetically attracted to the second connecting part, and the first connecting part and the second connecting part are matedly connected;

The inner wall surface of the outer tank body is symmetrically provided with card slots, the card slots are provided with a magnetic adsorption layer, and the outer wall surface of the inner tank body is symmetrically provided with metal barbs, and the card slots cooperate with the metal barbs connect;

In particular, the flexible seal is arranged coaxially with the tank body.

Further, the flexible sealing member is a hollow cylindrical sealing member with concave sides.

In the present invention, when a certain pressure condition is reached, the outer tank body can slide to a certain extent relative to the inner tank body, and the flexible sealing member of the present invention can be stretched to a certain extent, thereby changing the volume of the tank body to reduce the pressure caused by transportation or use. The pressure generated by the increase in the internal pressure of the tank caused by the shaking during the process prolongs the service life of the product. In extreme cases, when the internal pressure of the tank is too high, the outer tank body and the inner tank body can be automatically stretched under the action of pressure to avoid safety hazards caused by excessive internal pressure. The flexible sealing member can connect the upper end of the inner tank body and the inner wall of the inner tank body, so as to realize the airtightness of the seams of the two. The flexible seal can be made of any flexible sealing material, such as plastic, rubber, etc. The metal protrusions on the outside of the inner tank can be embedded in the card slot on the inner wall of the outer tank, and then strengthened and fixed with the magnetic adsorption layer inside the card slot to prevent the retraction of the outer tank and the inner tank, and reduce the pressure on the outer tank and the inner tank. The restoring force between them is against the compression inside the tank. Both the metal protrusion and the card slot can be integrally formed with the inner tank body and the outer tank body through the existing metal processing technology, and the magnetic adsorption layer can be arranged inside the card slot through any existing technology. The lower end of the outer tank body is provided with a first connecting part, and the upper end of the base is provided with a second connecting part, through the magnetic connection between the first connecting part and the second connecting part, the inner tank body and the outer tank body can be further effectively restricted. The sliding direction of the tank body should be avoided to avoid its deflection and damage to the flexible seal, resulting in a decrease in the tightness of the tank body. In particular, under normal conditions, through the magnetic adsorption force of the first connection part and the second connection part, the gravity of the outer tank body, the adsorption force of the metal protrusion and the slot and its inner wall, the outer tank body and the inner tank body A stable equilibrium state can be reached between them, and no deviation will occur. In particular, the present invention is provided with an alarm device at the connection between the first connection part and the second connection part. When the first connection part is separated from the second connection part, the alarm device will give an alarm to remind the operator to pay attention.

Further, the wall of the outer tank body is provided with a metal outer wall, a polymer hydrogel layer, a rubber layer, a capillary layer, an aluminum foil layer, and a metal inner wall in sequence from outside to inside, and the polymer hydrogel layer includes a first A polymer hydrogel layer and a second polymer hydrogel layer, the first polymer hydrogel layer and the second polymer hydrogel layer are symmetrically arranged on both sides of the rubber layer, and the capillary layer runs through The rubber layer connects the first polymer hydrogel layer and the second polymer hydrogel layer, the rubber layer is symmetrically provided with through holes 53 , and the metal inner wall is symmetrically provided with card slots. In particular, the capillary layer and rubber layer described in the present invention can be realized by any existing technology in the art, preferably metal capillary, preferably rubber with a larger elastic modulus as the rubber layer of the present invention; The adhesive layer is wrapped with a polymer film and adhered to the surface of the polymer hydrogel layer through an adhesive. The polymer film can prevent the water leakage and evaporation of the polymer hydrogel.

Preferably, the rubber layer is a thermoplastic elastomer layer 143 , and the thermoplastic elastomer 12 is a material that has the high elasticity, high strength, and high resilience of rubber, and can be processed by injection molding. It is environmentally friendly, non-toxic and safe, has a wide range of hardness, excellent colorability, soft touch, weather resistance, fatigue resistance and temperature resistance, excellent processing performance, no need for vulcanization, can be recycled to reduce costs, and can be used for secondary injection molding. It can be coated and bonded with PP, PE, PC, PS, ABS and other base materials, and can also be molded separately, with excellent elastic cushioning performance.

The outer tank body of the present invention can achieve the effect of shock absorption and buffering by sequentially setting the metal outer wall, polymer hydrogel layer, rubber layer, capillary layer, aluminum foil layer, and metal inner wall, avoiding the effect of external stress, and changing the present invention The internal pressure affects its stability. In the present invention, through the uniformly arranged polymer hydrogel layer, when the outer tank body is subjected to external stress from the side, the moisture in the first polymer hydrogel layer enters the second polymer hydrogel layer through the capillary layer, Then, through the pressure difference, the moisture in the second polymer hydrogel layer returns to the first polymer hydrogel layer through the capillary layer to realize buffering. At the same time, it cooperates with the synergistic effect of the rubber layer to achieve the best cushioning effect.

Further, the metal inner wall 316 is a 5083 aluminum alloy inner wall. The inner wall of 5083 aluminum alloy in the present invention has a face-centered cubic structure. Compared with other metals, its mechanical properties do not decrease when the temperature drops, but are enhanced to a certain extent without low-temperature brittleness. Widely used in various industries. The 5083 aluminum alloy for ultra-low temperature is one of the materials used in low-temperature storage tanks. This alloy has the advantages of good plasticity, high strength, corrosion resistance and processability, and improves the safety of transportation and use of the present invention.

Further, the base includes a main body and a second connecting portion symmetrically arranged on the upper end of the main body, and the main body includes a mesh fiber layer, a buffer layer, an antibacterial layer, a waterproof layer 22 and a bottom plate arranged in sequence.

In the base of the present invention, the mesh fiber layer used is a three-dimensional mesh structure formed by the interweaving of plant fibers and organic fibers in the prior art, and has high elasticity and toughness. The antibacterial layer is the Fe ₃ O ₄ -graphene composite antibacterial layer in the prior art, the waterproof layer 22 is the polyurethane waterproof layer 22 in the prior art, and the base plate is high hardness wood or Wood fiber base.

The base of the present invention has excellent anti-seismic cushioning through the effect of the reticular fiber layer and the buffer layer. At the same time, the base plate adopted by the present invention is compared with the metal plate of the prior art, due to the high hardness wood or wood fiber base plate of the present invention. The mesh fiber structure has a certain buffering effect; through the antibacterial layer and the waterproof layer 22, it can prevent corrosion and moisture; considering the portability of the present invention, the base of the present invention has the advantage of light weight and will not cause additional burden.

Further, the buffer layer includes an EPE board, a first protrusion, and a second protrusion, the first protrusion is disposed on the EPE board, the second protrusion is disposed on the EPE board, and the The first protruding blocks and the second protruding blocks are oppositely arranged in a staggered manner. In particular, there is a distance between the end of the first protrusion and the EPE plate where the second protrusion is located, and the end of the second protrusion is against the EPE plate described by the first protrusion. In the present invention, the EPE board used in the prior art, EPE (ExpandablePolyethylene), is expandable polyethylene, also known as pearl cotton, which has a non-crosslinked closed-cell structure, and it is mainly made of low-density polyethylene (LDPE). High foam polyethylene products produced by extrusion of raw materials. It is composed of low-density polyethylene fat through physical foaming to produce countless independent bubbles. It overcomes the shortcomings of ordinary styrofoam that are fragile, deformed, and poor in recovery. It has many advantages such as water and moisture resistance, shock resistance, sound insulation, heat preservation, good plasticity, strong toughness, recycling, environmental protection, strong impact resistance, etc., and also has good chemical resistance.

Further, the horizontal section of the first protrusion is an arc, the horizontal section of the second protrusion is an arc, and the arc of the first protrusion is 1.5 times the arc of the second protrusion.

In the present invention, the first protrusion, the second protrusion, and the EPE plate are made of the same material, and the buffer layer adopted can be used through the function of the first protrusion and the second protrusion of different volumes arranged in opposite directions and staggered. Under the condition of external stress, elastic deformation occurs, and the longitudinal stress received is extended to the lateral direction, and the rebound is realized, so as to achieve the effect of shock absorption and buffering.

The present invention can provide a stable guarantee for the transportation, carrying and use of the present invention through the buffer structure provided between the liquid nitrogen device 3, the outer box 1, the inner box 2 and the outer box 1, and avoid liquid nitrogen Device 3 has potential safety hazards such as internal pressure instability due to vibration and shaking. The freezing method of the refrigerator of the present invention can make the temperature field in the inner box 2 more uniform, and use liquid nitrogen as the freezing source, so that the inner box 2 contains a higher concentration of nitrogen, which can play a better role in air conditioning.

The invention provides a detection sample freezing storage device, which is safe, stable, convenient to carry and easy to use, and is suitable for being used as a cold storage container for collecting samples during the outdoor sampling process.

Example 4

This embodiment provides a frozen storage device for detection samples. The structure of this embodiment is consistent with that of Embodiment 2, the difference is: further, the raw material of the polymer gel layer includes 4 parts by weight of bisallyl carbonate Diethylene glycol esters, 6 parts of acryloyl proline methyl ester, 0.07 parts of nonionic cellulose ether, 1.2 parts of maleic anhydride, 0.9 parts of potassium persulfate, 0.03 parts of trihydroxyglutaric acid, 0.04 parts of hydroxide Cerium and 95 parts of pure water. In the present invention, the raw materials such as bisallyl diethylene glycol carbonate and acryloyl proline methyl ester can be realized by using existing technologies. The nonionic cellulose ether can be any one of hydroxypropylmethyl cellulose ether and hydroxypropyl cellulose ether or a mixture thereof. Maleic anhydride is also known as maleic anhydride or dehydrated malic anhydride, often referred to as maleic anhydride. Potassium persulfate, inorganic compound, white crystal. Maleic anhydride and potassium persulfate can promote the polymerization and crosslinking of bisallyl carbonate and non-ionic cellulose ether, so that it can be combined with pure water to form a hydrogel. 3-Hydroxy glutaric acid (3-Hydroxy glutaric acid) is usually used in organic synthesis and pharmaceutical intermediates, which can be realized by using commercially available products. Cerium hydroxide is often used in the principle of cerium nitrate synthesis. In the present invention, trihydroxyglutaric acid and cerium hydroxide are especially added. When the two exist, the stability of water in the polymer hydrogel system at low temperature can be improved, and a large amount of water will be released at about 50°C to achieve rapid Cool down and have a certain buffering effect.

Further, the raw materials of the flexible sealing member include 82 parts of polyvinyl chloride, 0.24 parts of nano-alumina, 4 parts of tris(dimethylamino)silane, and 6 parts of coupling agent by weight.

Polyvinyl chloride, English abbreviation PVC (Polyvinyl chloride), is a vinyl chloride monomer (vinyl chloridemonomer, referred to as VCM) in peroxides, azo compounds and other initiators; or under the action of light and heat, it can be polymerized according to the mechanism of free radical polymerization. made polymer. The nano-alumina is preferably in the γ crystal form, and the particle size is preferably 10-50nm. Tris(dimethylamino)silane (CAS number: 15112-89-7) can be realized by using commercially available products. The coupling agent can be realized by using existing technology, and its function is to enhance the composite strength of nano-alumina and polyvinyl chloride. The present invention particularly selects polyvinyl chloride as the flexible seal, and the flexible seal is easily cracked due to abrasion after being in a bent state for a long time, which affects the airtightness. The present invention adds a proper amount of nano-alumina and tris(dimethylamino)silane to fill the polyvinyl chloride, which can significantly improve the wear resistance of the flexible sealing member without significantly reducing its softness, thereby improving the reliability of the present invention.

The preparation method of the polymer hydrogel layer of the present embodiment is: hydroxypropyl methylcellulose and bisallyl diethylene glycol carbonate are dissolved in pure water, then potassium persulfate is added, nitrogen gas is charged, and the temperature rises to 41°C, preheat for 15 minutes, add maleic anhydride, stir for 8 hours, then add acryloyl proline methyl ester (polymerization degree: 1950) to dissolve completely, pour it into the mold and put it in the freezer (-15 ℃) for 2.5 hours, then thawed, and cycled 5 times to obtain a polymer hydrogel layer.

Preferably, in this embodiment, the coupling agent is preferably an aluminate coupling agent. In this embodiment, the flexible sealing member can be formed by injection molding after melting and mixing various raw materials.

Example 5

This embodiment provides a frozen storage device for detection samples. The structure of this embodiment is consistent with that of Embodiment 2, except that the raw material of the polymer hydrogel layer includes 3 parts of bisallyl carbonate diethylene glycol by weight. ester, 8 parts of acryloyl proline methyl ester, 0.07 part of nonionic cellulose ether, 1 part of maleic anhydride, 0.9 part of potassium persulfate, 0.04 part of trihydroxyglutaric acid, 0.03 part of cerium hydroxide and 96 parts of pure water.

Preferably, the raw materials of the polyvinyl chloride sealing member in this embodiment include 85 parts by weight of polyvinyl chloride, 0.21 parts of nano-alumina, 3 parts of tris(dimethylamino)silane, and 5 parts of coupling agent. In this embodiment, the coupling agent is preferably an aluminate coupling agent. In this embodiment, the flexible sealing member can be formed by injection molding after melting and mixing various raw materials.

Example 6

This embodiment provides a polymer hydrogel layer used in the structure of Embodiment 2. Its raw material of hydrogel layer comprises by weight 3 parts of bisallyl diethylene glycol carbonate, 5 parts of acryloyl proline methyl ester, 0.18 part of nonionic cellulose ether, 0.6 part of maleic anhydride, 0.4 Potassium persulfate, 0.06 part of trihydroxyglutaric acid, 0.04 part of cerium hydroxide and 99 parts of pure water.

Example 7

This embodiment provides a polymer hydrogel layer used in the structure of Embodiment 3. Its raw material of hydrogel layer comprises by weight 5 parts of bisallyl diethylene glycol carbonate, 11 parts of acryloyl proline methyl ester, 0.02 part of nonionic cellulose ether, 2 parts of maleic anhydride, 1.4 Part potassium persulfate, 0.06 part trihydroxyglutaric acid, 0.02 part cerium hydroxide and 90 parts pure water.

Example 8

This embodiment provides a polymer hydrogel layer used in the structure of Embodiment 3. The raw materials of the hydrogel layer include 6 parts of bisallyl diethylene glycol carbonate, 12 parts of acryloyl proline methyl ester, 0.01 part of nonionic cellulose ether, and 0.5-2 parts of maleic anhydride by weight. , 0.3 parts of potassium persulfate, 0.07 parts of hydroxymalonic acid, 0.05 parts of cerium hydroxide and 100 parts of pure water.

Example 9

This embodiment provides a polymer hydrogel layer used in the structure of Embodiment 1. Its raw material of hydrogel layer comprises by weight 2 parts of bisallyl diethylene glycol carbonate, 4 parts of acryloyl proline methyl ester, 0.19 part of nonionic cellulose ether, 0.5 part of maleic anhydride, 1.5 1 part of potassium persulfate, 0.01 part of trihydroxyglutaric acid, 0.05 part of potassium hydroxide and 100 parts of pure water.

Example 10

This embodiment provides a polyvinyl chloride sealing member for the structure of Embodiment 2, and its raw materials include 90 parts of polyvinyl chloride, 0.3 parts of nano-alumina, 2 parts of tris(dimethylamino)silane, 10 parts of coupling agent. In this embodiment, the coupling agent is a silane coupling agent.

Example 11

This embodiment provides a polyvinyl chloride seal used in the structure of Embodiment 2, and its raw materials include 80 parts of polyvinyl chloride, 0.1 part of nano-alumina, 6 parts of tris(dimethylamino)silane, 1 part of coupling agent.

Example 12

This embodiment provides a polyvinyl chloride sealing member used in the structure of embodiment 2, and its raw materials include 90 parts of polyvinyl chloride, 0.3 parts of nano-alumina, and 10 parts of coupling agent by weight.

Example 13

This embodiment provides a polyvinyl chloride sealing member used in the structure of embodiment 2, and its raw material is commercially available polyvinyl chloride.

Abrasion resistance testing of flexible seals.

Table 1.

test group Coefficient of friction (steel) Elongation at break (%) Example 4 0.14 443 Example 5 0.15 448 Example 10 0.11 481 Example 11 0.16 446 Example 12 0.28 459 Example 13 0.26 475

Water holding capacity test of polymer hydrogel

Select the polymer hydrogels of Examples 4-9, and prepare them into a shape of 20 cm×10 cm (with a water content of 100 g). The polymer hydrogel was heated at 40°C, 45°C, and 50°C respectively, and its mass change within 12 minutes was recorded. The results are shown in Table 2-4.

Table 2. Mass change value of polymer hydrogel (40°C)

Experimental group/mass change (g) 3min 6 minutes 9 minutes 12 minutes Example 4 -0.7 -1.3 -1.5 -1.5 Example 5 -1.4 -1.7 -2.0 -2.1 Example 6 -0.3 -0.8 -1.3 -2.2 Example 7 -1.7 -2.9 -5.9 -12.1 Example 8 -2.0 -3.3 -7.3 -10.6 Example 9 -1.7 -3.0 -6.1 -11.3

Table 3. Mass change value of polymer hydrogel (45°C)

Experimental group/mass change (g) 3min 6 minutes 9 minutes 12 minutes Example 4 -0.8 -1.4 -1.5 -1.7 Example 5 -1.4 -2.0 -2.2 -2.9 Example 6 -1.2 -2.0 -2.4 -3.3 Example 7 -2.0 -3.3 -7.0 -13.4 Example 8 -2.1 -3.8 -10.7 -15.9 Example 9 -1.8 -3.6 -8.7 -14.4

Table 4. Mass change value of polymer hydrogel (50°C)

Experimental group/mass change (g) 3min 6 minutes 9 minutes 12 minutes Example 4 -12.8 -15.9 -23.4 -30.6 Example 5 -10.9 -17.2 -22.6 -30.0 Example 6 -12.5 -19.0 -27.6 -31.3 Example 7 -2.8 -5.8 -11.0 -15.1 Example 8 -4.5 -8.3 -12.5 -18.4 Example 9 -3.4 -6.3 -11.4 -16.6

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art. It should be noted that the technical features not described in detail in the present invention can be realized by any existing technology.

Claims (10)

1. one kind detection sample stored frozen device, including casing, freeze proof flexible pipe, tell that casing includes outer case and internal box, The internal box is inside the outer case, it is characterised in that the outer case is additionally provided with liquid nitrogen plan, the liquid nitrogen plan Located at the side of the internal box；

The outer case is provided with outer case lid, and symmetrically staggeredly elastomer and magnetic block are provided with the inside of the outer case lid；

The internal box is provided with interior case lid, and the elastomer on the outside of the interior case lid with offseting, the magnetic block and the interior case Outer side of lid connects；

The tank wall of the internal box is provided with heat-insulation layer, waterproof layer, and the waterproof layer is symmetrically set in the heat-insulation layer both sides, described interior Case lid is sequentially provided with metal level, heat-insulation layer, waterproof layer, the first hollow sandwich, and the tank floor is additionally provided with the second hollow sandwich, The liquid nitrogen plan is connected with first hollow sandwich, the second hollow sandwich respectively by freeze proof flexible pipe；

The freeze proof flexible pipe is provided with the first plenum member, the freeze proof flexible pipe and described second with the first hollow sandwich junction Hollow sandwich junction is provided with the second plenum member；

First hollow sandwich is arranged with spray orifice, and second hollow sandwich is arranged with spray orifice；

The outer case bottom includes damp-proof layer, heat-insulated cushion, the first magnet layer, the second magnet layer, elastomer layer, wear-resisting Layer, the first magnet layer are located at the side of the elastomer layer, and the second magnet layer is another located at the elastomer layer Side, the heat-insulated cushion are respectively arranged on the first magnet layer, the side of the second magnet layer, the damp-proof layer located at it is described every The side of Heat buffered layer, the wearing layer is located at the side of the heat-insulated cushion and positioned at the lower end of the outer case bottom.

2. detection sample stored frozen device according to claim 1, it is characterised in that the first plenum member outlet Fluid pressure is 0.5-0.75 times of the Fluid pressure of the second plenum member outlet.

3. the first magnet layer and the second magnet layer are Permanent-magnet layer, the magnetic of the first magnet layer and the second magnet layer Repel each other.

4. detection sample stored frozen device according to claim 1, it is characterised in that the horizontal cross-section of the spray orifice is Isosceles trapezoid.

5. detection sample stored frozen device according to claim 1, it is characterised in that the liquid nitrogen plan includes tank Body, the tank body are provided with exhaust outlet, and the exhaust outlet is provided with valve member, and the tank body lower end is provided with base, the tank body Including outer tank body, inner tank body, the inner tank body is inside outer tank body, it is characterised in that the outer tank body lower ending opening, it is described Inner tank body upper end open, the tank body is interior to be provided with flexible seals, and one end of the flexible seals and the upper end of inner tank body connect Connect, the upper end connection on the inside of the other end and outer tank body of the flexible seals；

The outer tank body lower end is provided with first connecting portion, and the base upper end is provided with second connecting portion, and the first connecting portion is Permanent magnet connecting portion, the second connecting portion are permanent magnet connecting portion, and the first connecting portion and second connecting portion magnetic are attracting, The first connecting portion is connected with second connecting portion；

The internal face of the outer tank body is arranged with neck, and the neck is provided with magnetic absorption layer, the outer wall of the inner tank body Face is arranged with metal barb, and the neck is connected with metal barb.

6. detection sample stored frozen device according to claim 5, it is characterised in that the flexible seals are side The hollow tube-shape seal of indent.

7. detection sample stored frozen device according to claim 5, it is characterised in that the wall of the outer tank body is by outer Metal outer wall, macromolecule hydrogel layer, rubber layer, capillary fringe, aluminium foil layer, metal inner surface, the high score are sequentially provided with to interior Sub- hydrogel layer includes the first macromolecule hydrogel layer and the second macromolecule hydrogel layer, the first macromolecule hydrogel layer, Second macromolecule hydrogel layer is symmetrically set in the rubber layer both sides, and the capillary fringe penetrates the rubber layer by described first Macromolecule hydrogel layer and the connection of the second macromolecule hydrogel layer, the rubber layer are arranged with through hole, the metal inner surface pair Title is provided with neck.

8. detection sample stored frozen device according to claim 7, it is characterised in that the metal inner surface is 9%Ni steel Any of inwall, Ni36 invar alloy inwall, 5083 aluminium alloy inwalls.

9. detection sample stored frozen device according to claim 8, it is characterised in that the base includes body, sheet The symmetrically arranged second connecting portion in body upper end, it is arlt's strata that the body includes setting gradually, cushion, antibiotic layer, anti- Water layer, bottom plate.

10. detection sample stored frozen device according to claim 9, it is characterised in that the cushion includes EPE Plate, the first projection, the second projection, on the EPE plates, second projection is located on the EPE plates first projection, First projection is staggeredly symmetrical arranged in opposite directions with second projection.