JPS60156784A - Cooling unit - Google Patents

Abstract

PURPOSE:To obtain a cooling unit capable of giving desired initial temperature, cooling retention time and size, by providing a reagent made up of sodium thiosulfate and urea and solvent-contg. capsules in hollow bag to mix said solvent and reagent to dissolution to effect cooling at any needed time. CONSTITUTION:The objective cooling unit 1 can be obtained by providing (A) capsules 2 within which a solvent such as water is stored and (B) a reagent 3 made up of solid particles or powder of sodium thiosulphate and urea, capable of low-temperature development by dissolving in said solvent in a hollow bag 4 constituted by e.g. plastic film. Said reagent 3 is such that one of the constituent, i.e. urea falls between 1 and 4 in any desired pts. by wt. per pt. by wt. of the other constituent: sodium thiosulfate. USE:Cooling for human body, substitutive article for ice.

Description

[Detailed description of the invention] Technical fields> The present invention relates to a cooling element for obtaining cold heat.

<Prior Art> In general, cold sources in households include water, ice, bags containing cold storage materials, etc., and these cold sources are often used to cool food and the human body.

By the way, the cold heat # of Tone 7 etc. had to be cooled and stored in a refrigerator until it was used, which was extremely troublesome to store, especially when taken outdoors, and long-term storage was impossible. .

Therefore, a bag has been developed in which a chemical that exhibits an endothermic reaction when dissolved is sealed inside the bag to obtain cold heat only when needed, but the selection of the chemical that exhibits this endothermic reaction and the blending ratio were determined through experimentation. When selecting the chemicals to be used for this cooling element, the conditions for selecting the chemicals used for this cooling element are as follows: Since the cooling element is primarily used to cool the human body, the indoor ambient temperature or 20~30℃
In the second cooling period, the initial temperature is lower than -10℃,
The cooling time required to raise the temperature from -10°C to 10°C is approximately 30 minutes, and the time required to raise the temperature to 15°C is approximately 60 minutes.
Separate plates 2 are the minimum required, and it is also necessary to consider the external dimensions of the cooling body, such as wrapping it around the body.
Sizes between 100 and 250, and 100 and 5001 for clamping molds.
It is necessary to select a drug that has an appropriate degree of damage and that corresponds to this, that is, it is necessary to select a drug that has the optimum size and weight per weight and has the above-mentioned performance.

<Objective> An object of the present invention is to provide a cooling body that satisfies the above conditions.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a sectional view of an embodiment of the present invention, and Fig. 2 is a top view (partially cut away) of the same.
is a cooling body. This cooling body 1 is composed of a capsule 2 storing water containing a solvent, a drug 3 that generates cold heat by dissolving in the water, and a plastic film, etc., filled with the capsule 2 and the drug 3. Bag 4 and
It consists of Two capsules containing water, one in the center of the cooling body 1, are configured so that when pressure is applied to the capsule 2, the capsule 2 ruptures and the water inside flows out. has been done.

The drug 3 is a mixture of sodium thiosulfate crystalline particles, powder, or lumpy solids with urea crystalline particles or powdery solids, and the mixing ratio is 1 part sodium thiosulfate. and urea at a weight ratio of 1 to 4.

Further, the mixing ratio of this drug and the water in the capsule 2 is approximately 1 part water to 1 part drug. That is, a bone-to-weight ratio of about 1:] has excellent performance as a cooling body.

The bag 4 is formed into a hollow bag with a sealed interior by joining a sheet 1-shaped material such as a plastic film at the top and bottom and thermally welding the outer periphery.

Next, an explanation will be given of an experiment and its results that have confirmed that the above configuration is excellent as a cooling body.

Five samples were prepared, and each sample will be explained using Figures 3 and 4. As shown in Figure 4, the four samples from ■ to ■ contain thiosulfate as a drug. mixed with sodium (hypo) and urea,
■ is only hypo. To explain in more detail, ■ is hypo 30! to 30% urea at a weight ratio of 1:1.
) A capsule containing 50% of water is added to the medicine as shown in FIG. 1, and the mixture is sealed in a bag. In this sample (■), the bag was constructed as shown in Figure 3 (a) and (bl).
5 (RI bag) This bag 5 has upper and lower sheets made of foamed polyethylene sheets 6, a rectangular window is provided in the center of the upper sheet, and an aluminum foil 7 is provided in the window.
has been established. In other words, the aluminum foil 7 in the center of the top surface
Only this part emits cold heat, and the other parts are insulated. Therefore, as shown in Figure 1fa), the external dimensions of the sample (■) are 11011 cm tall as shown in Figure 4.
It has 3IX width and 160 fins, and the heat dissipation surface dimensions are 30 x 7 Qsu+ which is the area of aluminum foil 7. In FIG. 3(1)), 8 is a sealing resin sheet laminated on the inner surface of the upper and lower sheets, and 9 is a content such as a medicine.

Next, let's talk about sample ■: Hypo 30 as a drug! 25% of urea is mixed with (total 55.P)
The ratio is approximately 1:1, and the drug is mixed with water 507'.

The bag 10 used in this sample (2), as shown in FIG. 3 FC+, differs from the bag 10 shown in FIG. Therefore, the external dimensions are 110-+X140-+, and the heat dissipation surface dimensions are 95X105-J excluding the heat-welded portion, which is double that (x2) when the front and back sides are combined.

The following samples ■ to ■ are shown in Figure 3 (the composition is the same as that of bag 10 in C1, and the compounding ratio of the drug and the amount of water are as shown in Figure 4).
As shown in the figure. Sample ① was set up to compare what would happen if urea was not mixed as a chemical as described above.

Now, the measurement results for the above samples ① to ② will be explained with reference to the graph in FIG. 5.

First, if we look at the initial cooling layer of each sample, sample (■) is about -2.5℃, ■ is 0℃, ■ is -4℃, ■ is -3℃, and ■ is +6.5℃. The time it takes for the temperature of the cooling element (temperature of the cooling surface) to reach 10°C is approximately 33 minutes for the sample, approximately 30 minutes for ■, approximately 67 minutes for ■, and approximately 80 minutes for ■.

■The result was that it took about 20 minutes. Since the ambient temperature at the time of measurement is different for each, it is not possible to make an accurate comparison, but as a general trend, when comparing ■ and ■, which have almost the same proportions of hypo, urea, and water, the ambient temperature of ■ is higher for local cooling. Although the initial temperature is high, the initial temperature is -2.5℃, and ■ is 0℃.
Therefore, it can be seen that a lower temperature can be obtained by allowing local cooling to occur. Therefore, this local cooling method (2) is considered to be effective when locally cooling sprains and burns cause heat generation. Also, in case (2), where the mixing ratio of hypo and urea is 1:4 and the ratio of water to this drug is the same, the initial temperature is -4°C, which is considerably lower than in case (2). or.

Sample ■ with a total weight of 410 kg had an initial temperature of -4°C.
It takes 130 to 140 minutes to reach 15°C. Looking at Sample ■, it can be seen that both the initial temperature and storage time are inferior to Sample ■, which contains only hypo as the drug.

From these results, the mixing ratio of the drug Hypo and urea should be approximately 1: (1 to 4), and the mixing ratio of water to this drug should be approximately 1:1, and the total weight should be reduced from 100p to 400y.
It can be seen that by increasing the temperature, both the minimum temperature and the cold storage time are excellent. (It is possible that the cooling time will change depending on the method of heat dissipation. For example, the heat exchange characteristics will be completely different depending on whether there is wind or not.
It seems that the box-shaped one is completely different. Regarding the initial minimum temperature, the data in Habo's 1 is reliable. ) By the way, when cooling the human body, care must be taken to prevent frostbite due to low temperatures. Although the time required is 30 minutes, 120 minutes is required, but for practical purposes, it may be desirable to set the cooling temperature to 0 to 5°C. In this case, in Example 1, the ratio of urea to 1 part of hypo was 1 to 4, but conversely, the above conditions can be met by making the ratio of 1 to 4 of hypo to 1 part of urea. can.

Figure 6 shows data when the cooling temperature is set high. In this Figure 6, the X mark is hypo 1422
For this, urea is 1, ○ mark is hypo 2: urea 1, Δ mark is hypo 3: urea 11, open mark is hypo 4: urea 1, and the weight of this drug is 60 to 507'. Mix 50 to 60 J' of water with this drug and make a total weight of 1
00-1201.

As a result, as is clear from Figure 6, the initial temperature for one cooling is 0 to 5℃, and the cooling time is 15℃, which is about 45℃.
-60 minutes were obtained.

Terakamu --- To make the cooling temperature 0 to 5℃, you can use only hypo without mixing urea, and the content weight is 30℃.
0-500! It is necessary to increase it slightly. In addition, 300
A weight of ~500 knots is within the practical weight range.

Effect> According to the present invention, in the cooling body formed by enclosing a capsule containing a solvent and a drug that generates cooling by dissolving with the solvent in a hollow bag, the drug is Since sodium thiosulfate and solid particles or powder of urea are blended in appropriate amounts, the desired initial cooling temperature and cooling holding time can be obtained with a cooling body of a predetermined size. This cooling body is easy to use, economical, and very convenient because it can generate cold heat by mixing and dissolving the medicine and water only when necessary. Especially when cold heat is needed outdoors, cold heat can be obtained by mixing chemicals and solvents only when needed, so compared to conventional cold generators that are cooled in refrigerators, storage and usability of cold heat are dramatically improved. .

Moreover, its uses are not limited to simply cooling the human body.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention. No. 1? The figure is a top view of the same. Mi. FIG. 13 is a diagram showing the same embodiment, Fig. 4 is an explanatory diagram of an experiment of an embodiment of the present invention; Figure 5 is a diagram showing the results of the same experiment as above; FIG. 6 is a diagram showing experimental results of another example. 1: Cold body, 2: Capsule, 3: Medicine, 4: Bag. Agent: Patent attorney Aihiko Fuku (and 2 others) Rdd--

Claims (1)

[Claims]] A capsule containing a solvent inside a hollow bag. In the cooling body which encloses this solvent and a drug that generates cooling by dissolving it, the drug described in item 1 is a mixture of sodium thiosulfate and solid particles or powder of urea in an appropriate amount. A cooling body characterized by: 2. The drug mentioned above was mixed at a weight ratio of 1 to 4 parts of sodium thiosulfate to urea. Claims characterized in that the weight ratio of the solvent to 1 of the drug is approximately 1-0.5. The cooling body according to item 1.