JP2009112598A - Refrigerating implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerating implement which is simply constructed and can keep a refrigerating capacity for a long time, and especially can touch a body to refrigerate with no feeling of excessive coldness. <P>SOLUTION: The refrigerating implement includes two kinds of refrigerating materials 3 and 4 having their respective melting points different from each others, wherein the refrigerating material 4 having a lower melting point of preferably -30-5°C is positioned in the central section while the refrigerating material 3 having a higher melting point of preferably 6-30°C is done around the refrigerating material 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cold insulator provided with two or more kinds of cold insulators having different melting points, and more particularly to a cold insulator suitably used for cooling a local body part such as a neck, a shoulder, a back, and a forehead. .

  In recent years, it is not uncommon for summer days when the highest temperature is 30 ° C or higher to continue for many days, and for the heat island phenomenon in urban areas to become extremely hot days with a maximum temperature of 35 ° C or higher. Under such a high temperature environment, not only outdoors but also indoors, it is easy to get heat stroke by long-time work, and fatal accidents due to heat stroke frequently occur.

Therefore, various techniques for cooling the human body have been proposed for the purpose of measures against heat stroke. For example, in Patent Document 1, a plurality of temperature-dependent shape memory resin materials having different storage temperatures are disposed on the human body surface side of the cold heat source, and a plurality of levels of temperature setting layers are provided from the cold heat source to the human body surface side. There has been proposed a temperature-control garment that maintains the temperature of the outermost layer in contact with the human body surface at a comfortable temperature of about 20 ° C. Patent Document 2 proposes a cooling tool that combines a cooling effect and flexibility by dispersing capsules filled with a freezing liquid in the antifreezing liquid.
Japanese Patent Laid-Open No. 6-25003 JP-A-8-238269

  However, in the proposed technique of Patent Document 1, it is necessary to use a cold heat source having a lower melting point in order to extend the cold insulation time without increasing the volume of the cold heat source. In this case, in this case, the outermost layer on the human body surface side is required. In order to keep the surface temperature at about 20 ° C., many temperature setting layers must be formed between the cold heat source and the human body, which complicates the structure of the clothes. Moreover, since the antifreezing liquid with a low melting point is in contact with the human body in the proposed technique of Patent Document 2, there is a concern that the human body may be uncomfortable due to overcooling.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a cold insulator having a simple structure and capable of maintaining a cold insulation effect for a long time.

  Another object of the present invention is to provide a cold insulator that feels moderate coldness when in contact with a human body.

  According to the present invention, a cold insulator provided with two or more types of cold insulation materials having different melting points, the cold insulation material having the lowest melting point is located in the center, and the melting point is low from the center toward the outside. There is provided a cold insulator characterized in that the cold insulator is sequentially positioned.

  Here, two types having different melting points may be used as the cold insulation material, a cold insulation material having a low melting point may be located in the center, and a cold insulation material having a high melting point may be located therearound. At this time, the inner container may be held at substantially the center of the outer container, the outer container may be filled with a cold insulation material having a high melting point, and the inner container may be filled with a cold insulation material having a low melting point.

  The melting point of the cold insulating material having the highest melting point is preferably in the range of 6 to 30 ° C, and the melting point of the cold insulating material having the lowest melting point is preferably in the range of -30 to 5 ° C.

  From the viewpoints of flexibility after being solidified, handling properties, and the like, it is preferable to use a cold insulating material having the highest melting point and disposed in the outermost part of the cold insulator, in which the cold insulating material is encapsulated.

  In addition, according to the present invention, there is provided a cold insulation member characterized in that two or more of the cold insulation tools described above are connected in a foldable manner.

  In addition, according to the present invention, there is provided a garment characterized in that at least one of the cold-retaining tool and the cold-retaining member described above is detachably provided.

  In the cold insulator according to the present invention, two or more kinds of cold insulators having different melting points are used, the cold insulator having the lowest melting point is positioned at the center, and the cold insulators are positioned from the center toward the outside in order of decreasing melting point. As a result, the cooling effect of the cold insulator can be significantly maintained as compared with the conventional case. In addition, since the cold insulator of the present invention has a temperature distribution with a high surface temperature and a low center temperature, for example, when used for cooling the human body, it can provide an appropriate coldness when touching the skin. It doesn't feel excessive cold like the conventional one. In addition, the cold insulator of the present invention can be suitably used when it is desired to keep cold in a predetermined temperature range for a long time, such as when transporting wine.

  Hereinafter, although the cold insulator which concerns on this invention is demonstrated based on figures, this invention is not limited to these embodiment at all.

  FIG. 1 is a plan view showing an embodiment of a cold insulator according to the present invention, and FIG. 2 is a sectional perspective view thereof. The cold insulator C shown in FIG. 1 and FIG. 2 has an inner bag (inner container) 2 positioned substantially at the center of an outer bag (outer container) 1 having a seal portion 11 formed on the outer edge. The cold insulating material 3 is filled, and the inner bag 2 is filled with the cold insulating material 4. A material having a higher melting point than that of the cold insulating material 4 is used as the cold insulating material 3.

  As is apparent from FIGS. 1 and 2, one of the major features of the cold insulator C according to the present invention is that the inner bag 2 filled with the cold insulation material 4 is formed in the center of the outer bag 1 filled with the cold insulation material 3. It is located. That is, the cold insulation material 4 with a low melting point is located in the center of the cold insulation tool C, and the cold insulation material 3 with a high melting point is located around it. This makes it possible to maintain a surface temperature that does not give excessive cooling to the human body for a long time.

  The method for positioning the inner bag 2 at the center of the outer bag 1 is not particularly limited. For example, a seal portion 11 formed on the outer edge of the outer bag 1 as shown in FIG. You may make it form the protrusion part 12 made to protrude and position the inner bag 2 with which the cold insulating material 4 was filled with this protrusion part 12. FIG.

  Further, as shown in FIG. 4, the inner bag 2 may be fixed in the outer bag 1. That is, the inner bag 2 having a quadrangular shape and projecting portions 21a and 21b projecting outward from two opposite sides is sandwiched between a pair of sheets 10a and 10b to be the outer bag 1 (FIG. ), (B)), and the three sides are heat-welded ((c) in the figure). Thereby, the protrusion part 21b of the inner bag 2 is welded and fixed to the bottom side between the pair of sheets that become the outer bag 1. And after filling the cold insulation material 3 and the cold insulation material 4 from the upper side opening part of the outer bag 1 and the inner bag 2 (the same figure (c)), the upper side opening part of a pair of sheet | seat which became the outer bag 1 is formed. The inner bag 2 is heat-sealed and sealed together with the upper side opening of the protruding portion 21a (FIG. 4D). Thereby, the protrusions 21 a and 21 b of the inner bag 2 are welded and fixed to the upper side and the bottom side of the outer bag 1, respectively, so that the inner bag 2 is surely positioned at the center of the outer bag 1.

  The material of the outer bag 1 and the inner bag 2 used in the present invention is not particularly limited as long as it can be filled with the cold insulating materials 3 and 4, but as described above, the outer bag 1 and the inner bag 2 are necessary. In the case of heat welding, various plastic films are desirable. Examples of the plastic film include polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyethylene terephthalate (hereinafter referred to as PET), polystyrene, nylon, polycarbonate, ethylene-vinyl alcohol copolymer, and ethylene-vinyl acetate copolymer. Film, an aluminum vapor deposition film, an aluminum oxide vapor deposition laminated film, a ceramic vapor deposition laminated film, and the like, and one or more of these may be used. Moreover, although it may implement | achieve either in a single layer body and a laminated body, the laminated body of a polyethylene film single layer body or a polyethylene film, and a nylon film is preferable.

  Another major feature of the cold insulator of the present invention is that the cold insulator 3 has a higher melting point than the cold insulator 4. Thereby, for example, when the cold insulator of the present invention is used for cooling a human body, the cooling effect can be achieved for a long time as compared with the conventional case without feeling excessive coldness. As melting | fusing point of the cold insulating material 3, the range of 6-30 degreeC is preferable, More preferably, it is the range of 10-25 degreeC. On the other hand, the melting point of the cold insulating material 4 is not particularly limited as long as it is lower than the melting point of the cold insulating material 3. For example, a range of −30 to 5 ° C. is preferable.

  Conventionally known materials can be used as the cold insulation material 3 to be filled in the outer bag 1, but when the human body is locally cooled, those having a positive melting point are desirable. There is. The paraffin is preferably a linear or branched one having 10 to 30 carbon atoms, more preferably a linear paraffin. Specifically, n-tetradecane (melting point: 5.9 ° C.), n-pentadecane (melting point: 9.9 ° C.), n-hexadecane (melting point: 18.2 ° C.), n-heptadecane (melting point: 22.0). ), N-octadecane (melting point: 28.2 ° C), n-nonadecane (melting point: 32.1 ° C), n-eicosane (melting point: 36.8 ° C), and the like. One or more of these paraffins may be used in combination so as to have a desired melting point.

  Further, as shown in FIG. 5, the paraffin used as the cold insulating material 3 may be microencapsulated. By using microencapsulated paraffin, the outer bag can be easily deformed even after the paraffin is solidified, and the cold insulator can be brought into contact with the shape of the human body. Further, when paraffin is melted, it is possible to prevent a liquid pool from being generated in the lower portion of the outer bag. Furthermore, even if the outer bag is broken, the scattering of paraffin is suppressed.

  As a method for microencapsulating paraffin, a conventionally known method can be used. For example, an encapsulation method by a composite emulsion method, a method of spraying a thermoplastic resin on the surface of the heat storage material particles, a surface of the heat storage material particles Examples thereof include a method of forming a thermoplastic resin in a liquid, a method of polymerizing and coating a monomer on the surface of heat storage material particles, and a method of producing a polyamide-coated microcapsule by an interfacial polycondensation reaction. As capsule wall materials, aminoplast resins such as urea formalin resin and melamine formalin resin are available in addition to polystyrene, polyacrylonitrile, polyamide, polyacrylamide, ethylcellulose, polyurethane obtained by techniques such as interfacial polymerization and in-situ method. Organic polymers such as are used.

  The size of the microcapsule 6 (shown in FIG. 5) is preferably in the range of an average particle size of 1 to 50 μm, more preferably in the range of 5 to 25 μm, particularly 90% or more of the particle size distribution is 5 to 25 μm. Those within the range are preferred. Moreover, although the thickness of a microcapsule is based also on the material, a thing of 0.1-30 micrometers is preferable normally, and the range of 0.5-6 micrometers is more preferable.

  On the other hand, the cold insulation material 4 filled in the inner bag 2 is not particularly limited as long as it has a lower melting point than the cold insulation material 3 filled in the outer bag 1. For example, water (melting point: 0 ° C.), lithium chlorate Trihydrate (melting point: 8.1 ° C.), sulfuric acid monohydrate (melting point: 9.0 ° C.), zinc chloride trihydrate (melting point: 10.0 ° C.), disodium phosphate dodecahydrate Product (melting point: -1.5 ° C), sodium carbonate (melting point: -2.1 ° C), potassium nitrate (melting point: -2.8 ° C), trisodium phosphate dodecahydrate (melting point: -3.0 ° C.), sodium fluoride (melting point: −3.5 ° C.), ammonium hydrogen carbonate (melting point: −3.9 ° C.), magnesium sulfate (melting point: −3.9 ° C.), ammonium dihydrogen phosphate (melting point: − 4.0 ° C.), potassium hydrogen carbonate (melting point: −5.4 ° C.), zinc sulfate (melting point: −6.5 ° C.), glycine (melting point: − 0.0 ° C), potassium hydrogen fluoride (melting point: −7.6 ° C.), barium chloride (−8.0 ° C.), disodium hydrogen phosphate (melting point: −9.9), etc. Can be mentioned. Among these, water is preferable because of its high heat of fusion, easy availability, and high safety.

  When water is used as the cold insulating material 4, a freezing point depressant may be dissolved in water so as to have a desired melting point. Examples of the freezing point depressant include water-soluble inorganic materials and organic materials. Examples of inorganic materials include salts that generate monovalent ions upon dissociation, such as sodium chloride, disodium phosphate, trisodium phosphate, sodium carbonate, sodium fluoride, sodium dihydrogen phosphate, sodium formate, acetic acid. Sodium salts such as sodium, sodium nitrate, sodium hydroxide, sodium bromide, sodium iodide; potassium nitrate, potassium bicarbonate, potassium hydrogen fluoride, potassium chloride, potassium fluoride, potassium nitrite, potassium iodide, tripotassium phosphate Potassium salts such as potassium carbonate and potassium hydroxide; ammonium salts such as ammonium hydrogen carbonate, ammonium dihydrogen phosphate, ammonium chloride, ammonium sulfate, and ammonium fluoride. Examples of the organic material include glycine, urea, methanol, ethanol, and the like. One or more of these freezing point depressants may be used in combination.

  The cold insulating material 4 filled in the inner bag 2 may be gelled by adding a gelling agent from the viewpoint of handleability. Alternatively, it may be microencapsulated in the same manner as the cold insulation material. As the gelling agent, for example, carboxymethylcellulose, carrageenan, xanthan gum, guar gum, pectin, polyacrylate, starch-acrylic acid graft, polyvinyl alcohol, vinyl acetate-acrylate, isobutylene-maleic acid, Examples thereof include water-absorbing polymers such as poly N vinylacetamide.

  FIG. 6 shows another embodiment of the cold insulator according to the present invention. The cold insulator shown in FIG. 6 includes three types of cold insulators having different melting points. This cold insulator is formed by superimposing four sheets of the same shape so as to completely coincide with each other and heat-welding the three sides to form three bag portions 93, 94, 95. The cold insulating material 4 having a low melting point is filled, the cold retaining material 5 having the second lowest melting point is filled in the bag portion 95, and the cold insulating material 3 having the highest melting point is filled in the bag portion 93. When this cold insulator is used for cooling the human body, the bag portion 93 filled with the cold insulator 3 having the highest melting point (for example, melting point: 16 ° C.) is used on the body side. Thereby, the cooling effect can be maintained for a long time without causing the human body to feel excessive coldness.

  FIG. 7 is a plan view showing an embodiment of the cold insulation member according to the present invention. The cold insulation member 7 of FIG. 7 is obtained by continuously connecting the three cold insulation tools C shown in FIG. In order to produce such a cold insulation member 7, for example, three sheets having a projecting portion 21a, 21b projecting outward from two opposite sides in a square shape between a pair of belt-shaped sheets serving as outer bags. The inner bag 2 is arranged at a predetermined interval, and the three sides and the inner bag 2 are thermally welded to each other so that three cold insulators C having the inner bag 2 attached to the central portion of the outer bag 1 are connected. A bag for the cold insulation member is formed. Then, after each of the cold insulation material bags is filled with the cold insulation material 3 and the cold insulation material 4, the upper side opening is thermally welded and sealed to obtain the cold insulation member 7 of FIG. In addition, after manufacturing the cool insulator C shown in FIG. 4 individually, you may connect them, but the above-mentioned method is recommended from viewpoints of production efficiency etc.

  According to the cold insulation member 7 having such a configuration, the connection portion can be bent. For example, when used for cooling the human body, the cold insulation member can be bent according to the body shape of the human body to increase the degree of adhesion with the human body. And the cooling effect can be improved. In addition, when the cold insulating member 7 described below is attached to the clothes, the cold insulating member 7 can be easily attached to the clothes.

  8 and 9 are a front view and a rear view showing an embodiment of a garment according to the present invention. The garment 8 shown in these drawings includes a vest type garment body 81 and an upright collar 82 that can be attached to and detached from the garment body 81. The clothing body 81 has left and right front bodies 83a and 83b and a back body 84, and the left and right front bodies 83a and 83b and the back body 84 are sewn at positions corresponding to the shoulders of the wearer. Further, the lower ends of the left and right front bodies 83a and 83b and the lower ends of the rear body 84 are connected by elastic members 85a and 85b such as rubber bands, thereby widening the range of physiques on which the garment body 81 can be worn. is doing. Of course, instead of the elastic members 85a and 85b, a belt member whose length can be adjusted may be used. The left and right front bodies 83a and 83b are opened and closed by fasteners 86, whereby the user can attach and detach the clothes 8. The standing collar 82 is detachably attached to the garment body 81 with a fastener (not shown).

  As the material of the front body 83a, 83b and the back body 84, conventionally known materials can be used. For example, a nylon mesh material excellent in air permeability can be suitably used. As a material of the standing collar 82, for example, a plain weave or a twill weave is suitable from the viewpoint of touch and durability.

  In the garment 8, storage pockets (not shown) are provided on the inner sides of a portion corresponding to the chests of the left and right front bodies 83 a and 83 b, a portion corresponding to the back of the back body 84, and a portion corresponding to the neck of the standing collar 82. Is formed, and the cold insulation member C to which the cold insulation tool C or two or more cold insulation tools are connected is detachably accommodated. By wearing the garment 8 containing the cold insulation tool C and the cold insulation member 7, an increase in body temperature can be effectively suppressed even when working in a high temperature environment, and heat stroke can be prevented.

  In addition, there is no limitation in particular in the attachment position of the storage pocket which accommodates the cold insulator C and the cold insulating member 7, What is necessary is just to determine suitably in consideration of a working environment. For example, the storage pocket may be attached to a portion corresponding to the shoulder or a portion corresponding to the armpit in addition to or instead of the attachment position.

  In addition, from the viewpoint of cushioning, dew condensation suppression, strength improvement, etc., it is a protective cover with a laminated structure of two or more layers in which the outer layer is an aluminum vapor deposition film or aluminum oxide vapor deposition laminated film, and the inner layer is a nonwoven fabric or woven fabric The cold insulator C and the cold insulator 7 may be covered and attached to the storage pocket of the garment 8.

It is a top view which shows one Embodiment of the cold insulator which concerns on this invention. It is a cross-sectional perspective view of the cold insulator of FIG. It is explanatory drawing of the method of positioning an inner bag in the center part of an outer bag. It is explanatory drawing of the other method of positioning an inner bag in the center part of an outer bag. It is sectional drawing which shows other embodiment of the cold insulator which concerns on this invention. It is sectional drawing which shows other embodiment of the cold insulator which concerns on this invention. It is a top view which shows one Embodiment of the cold insulating member which concerns on this invention. It is a front view showing one embodiment of clothes concerning the present invention. It is a rear view of the clothes of FIG.

Explanation of symbols

1 Outer bag (outer container)
2 Inner bag (inner container)
3 Coolant 4 Coolant 5 Coolant 7 Coolant 8 Clothes C Cooler

Claims (8)

A cold insulator provided with two or more types of cold insulation materials having different melting points,
A cold insulating material characterized in that a cold insulating material having the lowest melting point is located in the central portion, and the cold insulating materials are located in order from the lower melting point toward the outside from the central portion. It has two types of cold insulation materials with different melting points,
The cold insulator according to claim 1, wherein a cold insulating material having a low melting point is located in the center, and a cold insulating material having a high melting point is located around the cold insulating material.   The cold insulator according to claim 2, wherein the inner container is held at substantially the center of the outer container, the outer container is filled with a cold insulating material having a high melting point, and the inner container is filled with a cold insulating material having a low melting point.   The cold insulator according to any one of claims 1 to 3, wherein the cold insulator having the highest melting point is one in which the cold insulator is enclosed in a capsule.   The cold insulator according to any one of claims 1 to 4, wherein the cold insulator having the highest melting point has a melting point of 6 to 30 ° C.   The cold insulator according to any one of claims 1 to 5, wherein the cold insulator having the lowest melting point has a melting point in the range of -30 to 5 ° C.   Two or more of the cold insulators according to any one of claims 1 to 6 are connected so as to be bendable.   A garment comprising at least one of the cold insulation tool according to any one of claims 1 to 6 and the cold insulation member according to claim 7 in a detachable manner.