Phase-change cooling and fever-reducing cold storage bag capable of continuously cooling and recycling as well as preparation method and use method of phase-change cooling and fever-reducing cold storage bag

Abstract

The invention discloses a phase-change cooling and fever-reducing cold storage bag capable of continuously cooling and recycling and a preparation and use method of the phase-change cooling and fever-reducing cold storage bag. The cold storage bag comprises a sealing bag body, a phase-change material filled in the sealing bag body and an adsorption supporting body located in the sealing bag body and used for adsorbing the phase-change material. The sealing bag body is formed by pressing TPU (Thermoplastic Polyurethane) composite cloth; the adsorption support body is made of nano sponge; the phase change temperature of the phase change material is 28-32 DEG C; the phase change material is prepared from the following components in parts by weight: 1-5 parts of a nucleating agent, 0.1-5 parts of a thickening agent, 40-50 parts of anhydrous calcium chloride and 40-50 parts of ultrapure water. The difference between the lattice parameter of the nucleating agent and the lattice parameter of the calcium chloride hexahydrate is 15% or less, and the use amount of the nucleating agent is 1.5-2.5% of the total mass of the phase change material; the fever-reducing cold storage bag prepared from the inorganic phase-change material for the first time can be maintained at 28-32 DEG C for a long time and is the optimal temperature suitable for human body cooling, stress reaction of a patient is avoided, the cold storage bag can be repeatedly used, a new efficient physical cooling choice is provided for the patient, and the cold storage bag has very good practical value.

Description

Technical Field

[0001] The present invention belongs to the field of medical equipment, and in particular relates to a phase-change cooling and fever-reducing cold storage bag capable of continuous cooling and cyclic utilization, and a preparation and use method thereof. Background Art

[0002] Persistent high fever is one of the important symptoms of infection with the new coronavirus. Common methods of reducing fever include drug-induced fever and physical cooling. Since drug-induced fever often has significant toxic side effects and places a heavy burden on the liver and kidneys, necessary physical cooling is indispensable. Physical cooling refers to the use of physical cooling methods to conduct clinical treatment on patients with fever. The main purpose is to lower the body's temperature through physical heat conduction to achieve a cooling and fever-reducing effect, thereby reducing the frequency and number of times antipyretic drugs are used and reducing the damage to the liver and kidneys caused by the use of drugs.

[0003] Common physical cooling and fever reduction methods include applying ice packs, cooling and fever reduction patches, and wet towels. Among them, the wet towel needs to be constantly soaked and wrung out, which consumes manpower. Usually, the patient is bedridden and it is difficult to operate alone. The temperature of the existing physical cooling and fever reduction ice packs is too low, and the temperature difference with the patient's body temperature is large, which can easily cause stress reactions in the patient's body and is uncomfortable to use, especially for young children. In addition, the ice packs last for a short time, usually melting in half an hour. If you continue to use them, you need to freeze them or replace them with new ones. They are rarely used in clinical practice.

[0004] Physical cooling and antipyretic patches achieve the purpose of cooling by absorbing heat through the vaporization of water in the gel, or by volatile substances taking away body surface heat. The physical cooling and antipyretic patches currently on the market are mainly peppermint hydrogels, and their antipyretic principle is to evaporate the water and peppermint oil they contain and take away heat, thereby achieving the purpose of cooling and reducing fever. Although the temperature difference between the peppermint hydrogel antipyretic patch and the patient's body temperature is small, the water and peppermint oil content it contains is limited, the continuous cooling time is short, and as the peppermint oil and water are dissipated, its cooling effect decreases. When the peppermint oil and water are completely lost, it will no longer have a cooling effect. Therefore, the existing cooling and antipyretic patches are all disposable products. Once unpacked, they cannot be used a second time and are not reusable. In addition, the existing cooling and antipyretic patches are all cut into fixed sizes and shapes, which cannot be applied to different cooling area requirements.

[0005] Therefore, developing a cooling and fever-reducing cold storage bag that can maintain a suitable temperature for a long time and can be recycled multiple times is still an urgent problem to be solved. Summary of the invention

[0006] In order to solve the above problems and achieve the above objectives, the present invention provides a phase-change cooling and fever-reducing cold storage bag that can continuously cool down and be recycled, and a preparation and use method thereof, by synthesizing an inorganic phase-change material and filling it into a sealed bag to form a phase-change cooling and fever-reducing cold storage bag, the temperature of which is appropriately different from the human body temperature, the continuous cooling time is long, and it can be recycled. The specific technical scheme is as follows:

[0007] First, the present invention provides a phase-change cooling and antipyretic cold storage bag that can continuously cool down and be recycled. The cold storage bag includes a plurality of sealed bag bodies, a phase-change material filled in the sealed bag bodies, and an adsorption support body located in the sealed bag bodies for adsorbing the phase-change material; the sealed bag body is formed by pressing a TPU composite cloth; the adsorption support body is made of nano sponge; the phase change temperature of the phase change material is 28 to 32°C.

[0008] The aforementioned phase-change cooling and antipyretic cold storage bag that can continuously cool down and be recycled, the soft connection part and the wearing tether part are both side extensions of the sealed bag body; the soft connection part is used for connecting or assembling multiple sealed bag bodies, and the wearing tether part is used for installing an elastic headband.

[0009] Preferably, in the aforementioned phase-change cooling and antipyretic cold storage bag capable of continuous cooling and cyclic utilization, the soft connection portion is provided with Velcro, snaps or other connectors that are easy to assemble.

[0010] Preferably, the aforementioned phase-change cooling and antipyretic cold storage bag capable of continuous cooling and cyclic use, the wearing tether portion is provided with a connecting hole for the elastic headband for wearing to pass through and connect.

[0011] The aforementioned phase change cooling and fever-reducing cold storage bag capable of continuous cooling and cyclic utilization, wherein the phase change material is made of the following components:

[0012] Nucleating agent: 1 to 5 parts,

[0013] Thickener: 0.1-5 parts,

[0014] Anhydrous calcium chloride: 40-50 parts,

[0015] Ultrapure water: 40-50 parts,

[0016] The lattice parameter of the nucleating agent differs from that of anhydrous calcium chloride by 15% or less, and the amount of the nucleating agent used is preferably 1.5-2.5% of the total mass of the phase change material.

[0017] The aforementioned phase change cooling and fever-reducing cold storage bag that can continuously cool down and be recycled, the nucleating agent in the phase change material is preferably one of borax, magnesium chloride hexahydrate, strontium chloride hexahydrate, barium fluoride, barium carbonate, barium hydroxide octahydrate, and strontium hydroxide octahydrate, and the optimal nucleating agent is strontium chloride hexahydrate.

[0018] The aforementioned phase change cooling and fever-reducing cold storage bag that can continuously cool down and be recycled, the thickeners in the phase change material are sodium carboxymethyl cellulose, pectin, and gelatin. These thickeners have good thickening effects and certain salt resistance. The optimal thickener is sodium carboxymethyl cellulose.

[0019] The above-mentioned phase-change cooling and fever-reducing cold storage bag capable of continuous cooling and recycling, the most preferred formula of the phase-change material is: 2% strontium chloride hexahydrate, 0.5% sodium carboxymethyl cellulose, 49.4% anhydrous calcium chloride, 48.1% pure water.

[0020] Secondly, the present invention provides a method for preparing the aforementioned phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling, comprising the following steps:

[0021] S1: Preparation of phase change materials

[0022] Inject ultrapure water and anhydrous calcium chloride into the reactor, stir and dissolve, then add thickener and nucleating agent to the reactor in turn, continue stirring until the mixture is uniform, and then cool the materials to a suitable temperature to obtain a phase change material;

[0023] S2: Preparation of sealed bags

[0024] The TPU composite cloth is pressed into a bag body according to the requirements, and the sealed bag body has an elastic headband and a soft connection component for facilitating assembly between the bags;

[0025] S3: Preparation of adsorption support

[0026] Cut the nanosponge into small pieces of fixed size as adsorption supports for later use;

[0027] S4: Adsorption support bagging

[0028] Insert the adsorption support made of nano sponge from the elastic headband into the sealed bag made of TPU composite cloth to wait for filling;

[0029] S5: Phase change material filling

[0030] Filling a specified amount of phase change material into a sealed bag plugged with an adsorption support, and sealing the filling port after the phase change material is completely adsorbed by the adsorption support to obtain a phase change cold storage bag;

[0031] S6: Cooling and cold storage

[0032] The phase change cold storage bag filled with phase change material is left to cool. The phase change material in the bag absorbs cold energy to store cold. When the phase change cold storage bag completely turns into solid, the cold storage is completed and can be used for cooling down fever.

[0033] As a preferred technical solution, the method for preparing the phase change cooling and antipyretic cold storage bag capable of continuous cooling and recycling, in step S1, the preparation of the phase change material specifically includes the following sub-steps:

[0034] S1-1: inject ultrapure water and anhydrous calcium chloride into the reaction kettle, control the temperature to 90-95°C, start the stirrer, stir at a speed of 400-800 rpm for 10-20 minutes, until the anhydrous calcium chloride is completely dissolved;

[0035] S1-2: After the calcium chloride is completely dissolved, keep the rotation speed unchanged, open the circulating water cooling system of the reactor to reduce the temperature to 80-90°C (cooling rate is about 2°C / min), close the circulating water cooling system, add the thickener to the reactor, and then stir at a rotation speed of 1000-1500rpm for 10-20min until it is fully mixed;

[0036] S1-3: After the thickener is evenly mixed, keep the speed unchanged, open the circulating water cooling system of the reactor again to reduce the temperature to 60-70°C (cooling rate is about 1°C / min), close the circulating water cooling system, add the nucleating agent to the reactor, continue to stir at a speed of 1000-1500rpm for 10-20min until it is fully mixed, and the phase change material is obtained;

[0037] S1-4: After the nucleating agent is evenly mixed, keep the rotation speed unchanged, open the circulating water cooling system of the reactor again to reduce the temperature of the obtained phase change material to 40-50°C, close the circulating water cooling system, and then discharge the material for filling.

[0038] Again, the present invention provides a method for using the aforementioned phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling, comprising the steps of:

[0039] 1) Cool the phase-change cold storage bag into a solid state for standby use, or assemble the phase-change cold storage bag cooled into a solid state into a cold storage bag group of appropriate size through a soft connection component according to the area to be cooled;

[0040] 2) attaching the phase-change cold storage bag or the phase-change cold storage bag group that has been cooled into a solid state to the forehead of a feverish patient or other skin that needs cooling;

[0041] 3) The phase change material in the phase change cold storage bag continuously releases cold energy to help cool down the body while in contact with the patient's skin, and the phase change material undergoes phase change during the process of releasing cold energy, maintaining the temperature at 28-32°C until the phase change material in the cold storage bag is completely melted;

[0042] 4) Remove the phase change cold storage bag or phase change cold storage bag group in which the phase change material is completely melted, store it in an environment of 0 to 8°C for 2 hours or more, or store it in an environment below 25°C for 8 hours, and then complete the cold storage for reuse.

[0043] The beneficial effects of the present invention are:

[0044] 1) The present invention applies inorganic phase change materials to the medical field for the first time. The antipyretic cold storage bag prepared by the material can maintain a temperature of 28-32°C for a long time, which is the optimal temperature for human body cooling. This temperature can not only ensure efficient physical cooling of patients with high fever, but also will not cause stress response to patients due to too low temperature. Moreover, the cold storage bag of the present invention is reusable and can be used again to store cold after failure, providing patients with a new efficient physical cooling option.

[0045] 2) The inorganic phase change material used in the antipyretic cold storage bag of the present invention has a high enthalpy value, and a nucleating agent whose lattice parameter differs from that of calcium chloride hexahydrate by 15% or less is selected, so that it can absorb cold energy for cold storage in an environment below 25°C, without the need for a specific cooling environment, and can release cold energy to help the human body cool down during contact with the patient's skin. In addition, the phase change material of the cold storage bag of the present invention can maintain a temperature of 28 to 32°C during the phase change process of releasing cold energy, and the temperature does not start to rise until the phase change is completed and the melting is completed, achieving efficient physical cooling of high fever patients for 6 to 8 hours or longer, and has very good practical value.

[0046] 3) The practical sealing bag of the antipyretic cold storage bag of the present invention is made of TPU material, and the phase change materials are all inorganic components. The whole product does not contain organic components, and the raw materials used are all non-toxic and harmless materials, which are environmentally friendly, safe and reliable; and the sealing bag has an elastic head for easy use, and the bag body is designed into small pieces, and each small piece is softly connected, which can be fitted to the foreheads of different patients, solving the discomfort problem of the phase change material being too hard in a solid state.

[0047] 4) The preparation method of the antipyretic cold storage bag of the present invention has a simple process, the preparation conditions are highly controllable, the quality stability of the prepared product is high, and the cooling and antipyretic effect during use is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a schematic diagram of the structure of the phase-change cooling and fever-reducing cold storage bag capable of continuous cooling and recycling of the present invention;

[0049] Figure 2 It is a cross-sectional schematic diagram of a phase-change cooling and fever-reducing cold storage bag capable of continuous cooling and cyclic utilization according to the present invention;

[0050] Figure 3 This is a physical picture of the phase change cooling and fever-reducing cold storage bag experiment that can continuously cool down and recycle according to the present invention;

[0051] Figure 4 This is a physical picture of the phase change cooling and fever-reducing cold storage bag experiment that can continuously cool down and be recycled according to the present invention. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with embodiments and drawings.

[0053] Example 1

[0054] This embodiment is to prepare a phase change cooling and antipyretic cold storage bag that can be continuously cooled and recycled. Figures 1 to 4 As shown, the cold storage bag structure includes 5 sealed bag bodies, each of which is filled with phase change material, and the phase change material is adsorbed on the adsorption support body; the sealed bag body is pressed by TPU composite cloth; the adsorption support body is made of nano sponge; the phase change material is prepared by nucleating agent, thickener, anhydrous calcium chloride and ultrapure water. The specific preparation method is as follows:

[0055] S1: Prepare phase change material, as follows:

[0056] S1-1: Take 48.1 parts of ultrapure water and 49.4 parts of anhydrous calcium chloride, inject them into a reaction kettle, control the temperature to 95°C, start the stirrer, stir at a speed of 600 rpm for 15 minutes, until the anhydrous calcium chloride is completely dissolved.

[0057] S1-2: After the calcium chloride is completely dissolved, keep the speed at 600rpm unchanged, open the circulating water cooling system of the reactor to reduce the temperature to 85℃ (cooling rate 2℃ / min), close the circulating water cooling system, add 0.5 parts of sodium carboxymethyl cellulose to the reactor as a thickener, and then stir at a speed of 1200rpm for 15 minutes to fully mix the thickener. When the thickener is added at this time, the viscosity will continue to increase as the temperature decreases, and adding the thickener at a temperature of 85℃ can make the final material thickening effect obvious at room temperature, while ensuring that the viscosity of the material is low at medium and low temperatures for easy filling.

[0058] S1-3: After the thickener is mixed evenly, keep the rotation speed unchanged, open the circulating water cooling system of the reactor again to reduce the temperature to 65°C (cooling rate 1°C / min), close the circulating water cooling system, add 2 parts of strontium chloride hexahydrate into the reactor as a nucleating agent, continue to stir at a rotation speed of 1200 rpm for 15 minutes, mix the nucleating agent thoroughly, and obtain the phase change material.

[0059] S1-4: After the nucleating agent is evenly mixed, keep the rotation speed unchanged, open the circulating water cooling system of the reactor again to reduce the temperature of the obtained phase change material to 45°C (cooling rate 1°C / min), close the circulating water cooling system, and then discharge the material for filling.

[0060] S2: Prepare a sealed bag as follows:

[0061] The TPU composite cloth is pressed into a bag body as required, and the specification of the bag body is 8cm long × 3cm wide. The pressing areas on both sides of the long side of the sealed bag body leave margins as soft connection parts and wearing tether parts; the soft connection parts are affixed with Velcro, snaps or other assembly connectors that are convenient for connecting multiple bag bodies, and are used for connecting or assembling multiple sealed bag bodies; the wearing tether part is to set holes in the margin area of ​​the bag body to facilitate the installation of elastic heads for wearing and use. In other embodiments, multiple bag bodies can also be pressed together, that is, without Velcro, snaps and other connectors, the TPU composite cloth is directly pressed into a combination of multiple (for example, 5) bag bodies connected as required, and the margin areas on both sides of the bag bodies at both ends can provide holes for installing elastic heads, such as Figure 1 shown.

[0062] S3: Preparation of adsorption support

[0063] The nanosponge was cut into small pieces of fixed size as adsorption supports, with specifications of 8 cm in length × 2 cm in width × 1.5 cm in height.

[0064] spare;

[0065] S4: Adsorption support bagging

[0066] Insert the adsorption support made of nano sponge from the elastic headband into the sealed bag made of TPU composite cloth to wait for filling;

[0067] S5: Phase change material filling

[0068] Filling a specified amount (30 g*5=150 g) of phase change material into a sealed bag plugged with an adsorption support, and sealing the filling port after the phase change material is completely adsorbed by the adsorption support to obtain a phase change cold storage bag;

[0069] S6: Cooling and cold storage

[0070] The phase change cold storage bag filled with phase change material is left to stand (ambient temperature 20°C) to cool. The phase change material in the bag absorbs cold energy to store cold. When the phase change cold storage bag completely turns into solid, the cold storage is completed and can be used for cooling down fever.

[0071] Example 2

[0072] This example is to investigate the effect of phase change temperature on the cooling and fever-reducing effect. This example uses the phase change cold storage bag prepared in Example 1 as the basis for investigation, and uses other phase change materials with different phase change temperatures as controls to conduct cooling experiments to investigate the effect of phase change temperature on the cooling and fever-reducing effect.

[0073] In this embodiment, the cold storage materials used for investigation are:

[0074] Phase change material A: the phase change material prepared in Example 1;

[0075] Phase change material B: heptadecane is used as the phase change material (phase change temperature is 23°C);

[0076] Phase change material C: Octadecane is used as the phase change material (phase change temperature is 28°C);

[0077] Phase change material D: Sodium sulfate decahydrate is used as the phase change material (phase change temperature is 32°C);

[0078] Phase change material E: except for not containing a nucleating agent, the other components and preparation method are consistent with those of Example 1 (phase change temperature is 34° C.).

[0079] Phase change material F: disodium hydrogen phosphate dodecahydrate is used as the phase change material (phase change temperature is 36° C.) and filled into a TPU composite cloth sealed bag. The filling amount is consistent with that in Example 1.

[0080] Each phase change material is filled into a TPU composite cloth sealed bag, and the filling amount is consistent with Example 1; then each cold storage bag is placed in a 0°C environment to ensure that each cold storage bag is cooled into a solid, that is, each cold storage bag has completed cold storage. Then each cold storage bag is placed in a 40°C constant temperature environment, and a temperature detection sensor is set on the upper surface of the cold storage bag to monitor the temperature change of the cold storage bag, record the temperature change of each cold storage bag at 2 hours, 4 hours, 6 hours, 8 hours, 10 hours, and 12 hours, and count the time for each cold storage bag to completely melt, so as to evaluate the effect of the cold storage bag in continuously cooling and relieving fever.

[0081] The test results are shown in Table 1.

[0082] Table 1. Cooling effect of phase change materials with different phase change temperatures

[0083]

[0084] The test results in Table 1 show that phase change material A is a phase change material prepared from inorganic materials of the present invention, and its phase change temperature is 30°C, and its complete melting time is 8.5 hours. The remaining phase change materials are all organic materials, and their phase change temperatures cover 23°C to 36°C respectively. It can be seen that as the phase change temperature increases, its failure time is shortened, and the phase change material B (heptadecane) with the longest continuous cooling time listed has a continuous fever reduction time of 7 hours, but 28-32°C is a suitable temperature accepted by the human body, and will not cause stress damage to the human body due to excessive cooling. The phase change temperature of phase change material B is 23°C, and as a cooling and fever-reducing patch for the human body, it still cannot solve the problem of excessive cooling stress; the phase change temperature of phase change material C (octadecane) is 28°C, and the phase change temperature of phase change material D (sodium sulfate decahydrate) is 32°C, both of which are in the suitable temperature zone accepted by the human body, but their continuous cooling time is not as good as the inorganic phase change material of the present application. The phase change temperature of phase change material E is 34°C, and the phase change temperature of phase change material F (disodium hydrogen phosphate dodecahydrate) is 36°C, both of which are beyond the suitable temperature range accepted by the human body, and the cooling effect is not obvious, and the duration is too short. Among them, phase change material E does not contain a nucleating agent, and the crystallization is uncontrollable. In addition to generating calcium chloride hexahydrate, it also generates calcium chloride tetrahydrate, which causes the phase change temperature to become higher, and it is impossible to obtain a good cooling and continuous cooling effect.

[0085] Therefore, the above experimental results show that the nucleating agent is the core material of the phase change material of the present invention, which can guide the crystallization of the phase change process to calcium chloride hexahydrate, ensure a suitable phase change temperature, and a good continuous cooling time, so that the product can not only solve the problem of supercooling stress but also have a better continuous fever-reducing effect. And the continuous fever-reducing effect is better than that of organic materials. At the same time, the phase change materials of the present invention are all inorganic components, the whole product does not contain organic components, and the raw materials used are all non-toxic and harmless materials, which are environmentally friendly, safe and reliable.

[0086] Example 3

[0087] This example investigates the effect of the type and amount of nucleating agent on the cold storage temperature and effect of the cold storage bag. This example uses the phase change cold storage bag prepared in Example 1 (phase change material 3) as the basis for investigation. Under the condition that other conditions remain unchanged, phase change materials (1-9) are prepared by adding different nucleating agents and nucleating agent dosages, and the cold storage effect of cold storage bags filled with equal amounts of phase change materials at 4°C and 25°C is investigated. The cold storage experiment of this example is as follows:

[0088] Two cold storage bags filled with each phase change material (1-9) were prepared and placed in a 45°C environment for 10 hours to ensure that each cold storage bag was phase-changed and melted, that is, each cold storage bag was ineffective. Then the cold storage bag was divided into two parts, each with one cold storage bag of each type, and placed in two environments of 4°C and 25°C, respectively, to examine the cold storage time of each cold storage bag. The results are shown in Table 2.

[0089] Table 2. Effect of nucleating agent type and dosage on the cold storage temperature and effect of cold storage bag

[0090] sample Nucleating Agent Nucleating agent dosage Cold storage time at 4℃(h) Cold storage time at 25℃(h) Phase change material 1 none -- 3 -- Phase change material 2 Strontium chloride hexahydrate 1 4 -- Phase change material 3 Strontium chloride hexahydrate 1.5 4 12 Phase change material 4 (Example 1) Strontium chloride hexahydrate 2 4 8 Phase change material 5 Strontium chloride hexahydrate 2.5 4 12 Phase change material 6 Strontium chloride hexahydrate 3 4 -- Phase change material 7 Borax 2 4 10 Phase change material 8 Barium carbonate 2 4 12 Phase change materials 9 Barium Hydroxide Octahydrate 2 4 11 Phase change material 10 Titanium Dioxide 2 4 -- Phase change materials11 Carbon Black 2 4 --

[0091] From the results in Table 3, it can be seen that the nucleating agents of phase change materials 2-6 are all strontium chloride hexahydrate, and at 4°C, they can all store cold and phase-change into solids. At 25°C, phase change materials 1, 2 and 6 cannot store cold. This is because the absence of nucleating agent or too little or too much nucleating agent leads to a large degree of supercooling, and cold storage cannot be completed in a relatively high temperature environment (25°C). This proves that the nucleating agent and dosage of the present invention are necessary conditions for realizing cold storage of cold storage materials at room temperature; phase change materials 3-5 can all store cold and phase-change into solids, indicating that the dosage of the nucleating agent is best controlled to be 1.5-2.5% of the total mass of the phase change material.

[0092] Phase change materials 7-11 use nucleating agents different from strontium chloride hexahydrate. Among them, borax, barium carbonate, and barium hydroxide octahydrate used in phase change materials 7-9 can all complete cold storage at room temperature, while titanium dioxide and carbon black used in phase change materials 10 and 11 cannot. This shows that the type of nucleating agent is also an important factor in achieving cold storage of cold storage materials at room temperature. Overall, nucleating agents with lattice parameters that differ from those of calcium chloride hexahydrate by 15% or less can meet the use requirements, among which strontium chloride hexahydrate has the best effect as a nucleating agent!

[0093] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view. In addition, it should be understood that although this specification is described in accordance with the implementation mode, it does not include only one technical solution. This narrative mode of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling, characterized in that: The invention comprises a plurality of sealed bags, phase change materials filled in the sealed bags, and an adsorption support body located in the sealed bags for adsorbing the phase change materials; the phase change temperature of the phase change materials is 28-32°C.

2. The phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling according to claim 1 is characterized in that: The sealed bag body is provided with a soft connection part and a wearing tether part; the soft connection part and the wearing tether part are both side extension parts of the sealed bag body; the soft connection part is used for connecting or assembling multiple sealed bag bodies, and the wearing tether part is used for installing an elastic headband.

3. The phase-change cooling and antipyretic cold storage bag capable of continuous cooling and cyclic use according to claim 2, characterized in that: The soft connection part is provided with Velcro, snaps or other connectors that are easy to assemble; the wearing tether part is provided with a connecting hole for the elastic headband for wearing to pass through and connect.

4. The phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling according to claim 1 is characterized in that: The phase change material is made of the following components by weight: Nucleating agent: 1 to 5 parts, Thickener: 0.1-5 parts, Anhydrous calcium chloride: 40-50 parts, Ultrapure water: 40-50 parts; The lattice parameter of the nucleating agent is within 15% of the lattice parameter of calcium chloride hexahydrate, and the amount of the nucleating agent used is 1.5-2.5% of the total mass of the phase change material; The sealing bag body is formed by pressing TPU composite cloth; The adsorption support is made of nano sponge.

5. The phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling according to claim 1 is characterized in that: The nucleating agent is any one of borax, magnesium chloride hexahydrate, strontium chloride hexahydrate, barium fluoride, barium carbonate, barium hydroxide octahydrate, and strontium hydroxide octahydrate.

6. The phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling according to claim 5 is characterized in that: The thickener is one of sodium carboxymethyl cellulose, pectin or gelatin.

7. The phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling according to claim 6, characterized in that: The phase change material is made of the following components by mass fraction: Strontium chloride hexahydrate 2%, Sodium carboxymethyl cellulose 0.5%, Anhydrous calcium chloride 49.4%, Pure water 48.1%.

8. A method for preparing a phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling according to any one of claims 1 to 7, characterized in that: The steps include: S1: Preparation of phase change materials Inject ultrapure water and anhydrous calcium chloride into the reactor, stir and dissolve, then add thickener and nucleating agent to the reactor in turn, continue stirring until the mixture is uniform, and then cool the materials to a suitable temperature to obtain a phase change material; S2: Preparation of sealed bags The TPU composite cloth is pressed into a bag body according to the requirements, and the sealed bag body has an elastic headband and a soft connection component for facilitating assembly between the bags; S3: Preparation of adsorption support Cut the nanosponge into small pieces of fixed size as adsorption supports for later use; S4: Adsorption support bagging Insert the adsorption support made of nano sponge from the elastic headband into the sealed bag made of TPU composite cloth to wait for filling; S5: Phase change material filling Filling a specified amount of phase change material into a sealed bag plugged with an adsorption support, and sealing the filling port after the phase change material is completely adsorbed by the adsorption support to obtain a phase change cold storage bag; S6: Cooling and cold storage The phase change cold storage bag filled with phase change material is left to cool. The phase change material in the bag absorbs cold energy to store cold. When the phase change cold storage bag completely turns into solid, the cold storage is completed and can be used for cooling down fever.

9. The method for preparing the phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling according to claim 8, characterized in that: In step S1, the preparation of the phase change material specifically includes the following sub-steps: S1-1: inject ultrapure water and anhydrous calcium chloride into the reaction kettle, control the temperature to 90-95°C, start the stirrer, stir at a speed of 400-800 rpm for 10-20 minutes, until the anhydrous calcium chloride is completely dissolved; S1-2: After the calcium chloride is completely dissolved, keep the speed unchanged, open the circulating water cooling system of the reactor to reduce the temperature to 80-90°C, close the circulating water cooling system, add the thickener to the reactor, and then stir at a speed of 1000-1500 rpm for 10-20 minutes until it is fully mixed; S1-3: After the thickener is evenly mixed, keep the speed unchanged, open the circulating water cooling system of the reactor again to reduce the temperature to 60-70°C, close the circulating water cooling system, add the nucleating agent to the reactor, continue to stir at a speed of 1000-1500 rpm for 10-20 minutes until it is fully mixed, and obtain the phase change material; S1-4: After the nucleating agent is evenly mixed, keep the rotation speed unchanged, open the circulating water cooling system of the reactor again to reduce the temperature of the obtained phase change material to 40-50°C, close the circulating water cooling system, and then discharge the material for filling.

10. A method for using the phase-change cooling and antipyretic cold storage bag capable of continuous cooling and recycling according to any one of claims 1 to 7, characterized in that: Includes steps: 1) Cool the phase-change cold storage bag into a solid state for standby use, or assemble the phase-change cold storage bag that has been cooled into a solid state into a cold storage bag group of appropriate size through a soft connection component according to the area that needs to be cooled; 2) The phase-change cold storage bag or the phase-change cold storage bag group that has been cooled into a solid state is attached to the forehead of a fever patient or other skin that needs to be cooled; 3) The phase change material in the phase change cold storage bag continuously releases cold energy to help cool down the body while in contact with the patient's skin. During the process of releasing cold energy, the phase change material undergoes phase change, maintaining the temperature at 28-32°C until the phase change material in the cold storage bag is completely melted; 4) Remove the phase change cold storage bag or phase change cold storage bag group in which the phase change material is completely melted, store it in an environment of 0-8℃ for 2h or more, or store it in an environment below 25℃ for 8h or more, and then the cold storage can be completed for reuse.

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