JPS59149976A - Cooling medium - Google Patents

Abstract

PURPOSE:To provide a cooling medium suitable for an emergency medical purpose and developing a prolonged cooling effect, obtained by a method wherein a freezing mixture comprising ammonium nitrate, urea, ammonium sulfate, potassium nitrate, ammonium chloride, sodium chloride or monochloroacetic acid is melted under heating and the molten mixture is injected into a container to be held for a time sufficient to be cooled and solidified and subsequently packaged. CONSTITUTION:An anhydrous or hydrous powdery crystal of a freezing mixture comprising ammonium nitrate,urea, ammonium sulfate, potassium nitrate, ammonium chloride, sodium chloride or monochloroacetic acid is melted under heating at 180-360 deg.C and the melt is injected into a mold or a molding container to be solidified under cooling and, after coloration, aromatization or fire-proof processing are applied to the obrained solid freezing mixture, and the product is packed and preserved. In use, the freezing mixture is put in an ice bag, a plastic bag, a paper bag, a glass container or a metal can and a thickener, a volume extender, a heat insulating material and a solvent such as hydrous crystal salt solution or ice water, which are separately prepared, are put therein and all components are hermetically sealed to be brought into contact with an object to be cooled such as the human body. By this method, the solid freezing mixture is gradually melted to absorb heat of dissolution from the circumference to cool the object for a long time.

Description

Detailed Description of the Invention The present invention is intended to be developed as a substitute for ice cubes used for emergency medical treatment, for fishing, to keep food fresh, and as a cooling agent. A cryogenic agent consisting of crystal powder of common salt, magnesium chloride, monochloroacetic acid, etc. is dissolved in an anhydrous or hydrated state for 18 hours in a dissolution tank.
A solution heated and melted at a temperature of 0 to 360 degrees Celsius is poured into a mold or other container, cooled and solidified, and the solid cryogen block is colored, treated with an aromatic waterproofing agent, packaged and stored, and stored as needed. Insert the hydrated crystal salt, ice cubes, water, thickener, volume expander, insulation material, etc. into a cooling ice bag or freezer box, and seal it, directly or indirectly. The contents relate to a cooling method for a melt-molded cryogenic agent that is brought into contact with and cooled.

Ice blocks that have been pre-frozen in a freezer are often used as a refrigerant for general emergency relief, but it is difficult to obtain refrigerant for hospitals, homes, and other outdoor locations that do not have a freezer. When a refrigerant needs to be used immediately, there is a need to develop a refrigerant that has a long shelf life and does not change even at room temperature.

In addition, as another known refrigerant, an ice-free cold storage bag made of a gelled product of a thickener is used as a refrigerant, but it also needs to be frozen in advance and cannot be used in a place without a freezer.

In addition, as another refrigerant, a method is known in which crystalline powder as a cryogenic agent is dissolved in water to generate chills, but when the water temperature is high in summer, such crystalline powder dissolves immediately and does not generate enough chilling agents. Provides a cooling effect. In order to obtain a highly effective chilling effect, it was necessary to gradually dissolve the chilling agent and, during this time, to first lower the water temperature and gradually cool the water while suppressing its solubility.

For this reason, in this invention, in order to maintain the cryogenic agent in a state where it dissolves as slowly as possible, the cryogen crystal powder is
The material is heated and melted in a tank at 0 to 380°C, placed in a mold or other molding container, cooled and solidified, and molded into a large cryogen block to create a cryogen and improve its solubility. Adding a thickening agent and bulking agent to the block to delay the delay, and waterproofing the surface of the block to ensure safety and taste.
Separately package the product with coloring and fragrance added, and when using it as an ice pillow for emergency medical care, put the cryogen block and thickener etc. in a plastic laminate bag or rubber bag, etc., and then use it as a solvent. When inserting and sealing water, ice water, ice cubes, hydrated crystalline salts such as mirabilite, common salt, magnesium chloride, etc., they cool by contact with air temperature or human body temperature.
It gradually changes into a liquid or gel, exhibiting a chilling effect and cooling to -1 to -10℃, and since the chilling agent is a large block formed by melting and solidification, it gradually dissolves from the surface. Since the dissolution is 10 to 20 times slower than that of the powdered crystalline cryogen, the cooling time is extended, and if necessary, this block can be added to sustain the cooling for an even longer period.

It is convenient for keeping fish cold during fishing, and is useful for food, etc.
It is useful when used to keep pharmaceutical drinking water cold. For waterproofing of this cryogen block, cellulose ether,
The same ester, polyethylene vinyl acetate resin, polyacrylic acid polyurethane, gelatin parapine chloride, parapine stearic acid, wax polyvinyl acetal. When the surface is coated with a thin layer of waterproofing agent such as vinyl chloride, it prevents deliquescence when stored at room temperature and can be used for long-term preservation.When wrapped in plastic or film bags, it can be stored for several years, making it useful for rescue purposes. It is. It is also useful for preserving the freshness of fresh vegetables.

The manner of carrying out the invention will be explained below with reference to the drawings.

In the figure, 150 g of ammonium nitrate was heated to 320°C, melted, put into a mold, cooled and solidified, and the molded product was peeled off. , the stearic acid cellulose ether fragrance (3) is immersed in a melted liquid, withdrawn, cooled and solidified, and a thin film (2) of 0.2 micron thickness is applied to the block (1). Make artificial flowers and letter protrusions (4) on one side, and make a cryogen molding block (a). Figure 3 shows a block disk (
1) is melted and cast to make a cryogen block (A) in which the film (2) and the fragrance colorant (3) are mixed. This block molding may also be a cylindrical block obtained by casting and solidifying the chilling agent block (A) which has been melted and solidified into an aluminum foil tube (5').

Figure 5 shows hydrated crystals of mirabilite hexa-decahydrate (6).
This solid solvent (B) is poured into the ice bag from the opening (f) of the rubber ice bag (a) of the water pillow into the freezing agent block (A). ), solid solvent (B), thickener volume insulating material block (C), and press and fix them to the narrow side (G) of the neck of the entrance (f) with scissors (e), and remove the ice bag from the surface. The temperature is displayed by a color change method on the steel foil laminated liquid crystal (h) shown on the central projection-shaped surface (d). This liquid crystal (h) is made by coating fine powder of macrocapsules with a diameter of less than 0.2 microns containing cholesterol and azo dye with polyester resin, and consists of a thin film of 20 to 200 microns thick. , is a protruding character. Figure 6 shows the Yum ice bag (
d) shows a plan view. The mixture is cooled down from room temperature of 25°C to -5°C after 10 minutes and the cooling time continues until room temperature.

The cryogen block (A), the solvent (B), and the thickener volume insulating material (C) are inserted into the packaging container (9) shown in FIG. The blocks of C) are covered with plastic film capsules (8) and a large number of the blocks are housed in a packaging container.

Figure 8 shows a process diagram for molding this freezing agent, and shows a heater (
1a), heat and add 3% to 5% to the dissolving tank (2a).
Heat and melt ammonium nitrate (3a) filled with water, and use a gear pump (
4a), pour into the mold or aluminum foil container (5) on the Competition T-(5a) (5a'), and place in the air cooler (6a) (6).
a'), and the mold (7a) and aluminum foil container (5) are taken out, but the solidified material in the mold (7a) is released and immersed in the surface treatment tank (8a). Then, they were taken out and put on clothes. The solidified cryogen block (a) in the aluminum foil container (5) is sprayed with a sprayer (9a) to form coatings (2) and (3).

This is further packaged using a packaging machine as shown in Figure 7.

An example of the formulation of this chilling agent is as follows.

Example (1) Ammonium nitrate 578g Water 22g Example (2) Ammonium nitrate 500g Tungstate or molybdate 10g Water 30g Example (3) Ammonium nitrate 500g Ammonium chloride or common salt 100g Urea or ammonium sulfate 0-30g Magnesium chloride, salt 0-70g Potassium water (20g) etc. is very safe when adding a small amount of water, and ammonium nitrite is also used as an additive.

600g of this chilling agent block (A) placed in a rubber ice pillow
~1Kg, 300~600g of water, and then add thickener, volume expander, insulation material, and fragrance dye, and when sealing, the temperature drops to -5℃ and cools for about 2 hours. be effective. When an equal amount of solid sodium sulfate dodecahydrate crystals are added to this cryogen block, cooling is maintained for about 3 hours. The lowest temperature is -3°C, and an example of the formulation before thickening is as follows.

Example (4) Polyacrylic acid or its salt 5 to 10 g Polyvinyl alcohol Methyl starch pulp, expanded plastic materials 5 g Saw dust Example (4) shows a thickener, bulking material, and heat insulating material.
Coloring and fragrance: 0.01g of dye methylene violet;
After the mold is removed, a cryogen block is immersed in a solution of 0.02 g of lemon oil, 5 g of ethyl cellulose, and 100 g of alcohol, and dried to form a film.

In the case of parapine, the molten liquid is kept at 80°C and the block is immersed in the liquid. Parapine chloride is dissolved in toluene and immersed in the solution, pulled out, hardened, and dried. Solid solvents are also processed in the same way, and coating materials include polyurethane polyamide, polyester, polyvinyl resin polystyrene, synthetic rubber cellulose ester, polyether, polycarbonate, silicone resin, polyvinyl acetal, polybral, etc. Resins such as gelatin, formalin, urea phenolic resin, algiconic acid, zudermannan, hydrated carbon glue, and rubber glue are used.

Figure 9 shows the cooling characteristics. (1b) shows the rubber hydroscope using water as a solvent, and (2b) shows the block (A) in which the cryogenic agent is melted and solidified, placed in a rubber ice pillow and sealed. (3b) is a solid solvent sodium sulfate decahydrate block (B).
(4b) shows the characteristics of a mixture containing a thickener, a bulking agent, and a heat insulating material.The one containing urea and chloride has a temperature of -3℃. Although it does not become worse, it is highly safe.

As described above, the feature of this invention is that, as shown in FIG. 10 (1c), when a known cryogen powder is simply dissolved in water, the minimum temperature drops to -10°C, but the cooling time is the shortest. This is less than one-half of the amount obtained by melting and solidifying the material and dissolving it in water, and this is indicated by (1b). Furthermore,
When using Glauber's salt decahydrate as the solvent, the result is shown in (2b), and for large crystal blocks of Glauber's salt decahydrate, as shown in (3b), when the time is extended and a surface film is formed, (
It changes as shown in 4b) and is suitable for long-term cold storage. In addition, unlike conventional ice, it can be stored at room temperature for up to two years without melting and disappearing over time, making it extremely convenient as a refrigerant for ice pillows in emergency medical care. It deliquesces and does not liquefy, has high storage stability, and allows for additional cooling. It can be used to maintain the freshness of fishing for long periods of time, and can also be used to store foods and drinking water, etc., without ice. It is also an industrially useful invention as it can be used for cold storage in places without freezers and as a refrigerant for machinery.

[Brief explanation of the drawing]

Figure 1 is a diagonal front view of the molded block cryogenic agent melted and solidified according to the present application, Figure 2 is its A-B cut side view, and Figure 3 (A) is a front view of the melted and solidified molded block in an aluminum foil container. figure(
b) is a side view of the ice pack, Figure 4 is a side view of the cryogenic agent solidified in an aluminum foil cylinder, Figure 5 is a side view of the solid hydrated salt crystal, Figure 6 is the front view of the rubber ice pillow, and Figure 7 is the A front view of a packaging bag for a thickened mixture of cryogen block and solvent block, Figure 8 is a process diagram for manufacturing the cryogen block, and Figure 9 is its characteristics. Patent applicant Yuji Tanaka

Claims (1)

[Claims] As described in the following text, solid wood or hydrated powder crystals of cryogens such as ammonium nitrate, urea, ammonium sulfate, saltpeter, ammonium chloride, common salt, and monochloroacetic acid are heated and melted at 180 to 360°C to form a mold. The solid cryogenic agent is poured into molded metal foil containers, plastics, or paper glass containers, cooled, and solidified, then colored, scented, and treated with anti-protective treatment. Insert into a cooling container such as a paper bag, glass, metal can, etc., insert a separately prepared thickener, bulking material, hydrous crystal salt water containing heat insulating material, ice water, or other solvent and seal it, or seal it in a freezer box. A cooling method using a melt-molded cryogenic agent, which is sealed inside and gradually melted and cooled by the object to be cooled, such as air temperature or human body temperature.