Latent-heat storage material, cooling tool, cooler box, distribution packaging container, and cooling unit

A latent heat storage and packaging container technology, which is applied to heat exchange materials, heat storage equipment, indirect heat exchangers, etc.

Inactive Publication Date: 2020-03-31
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the inorganic salt solution will happen figure 1 The supercooling phenomenon shown, so the main ingredient does not solidify at the melting point, but the solidification of the sodium chloride aqueous solution with a melting point around -21°C requires cooling below about -28°C

Method used

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  • Latent-heat storage material, cooling tool, cooler box, distribution packaging container, and cooling unit
  • Latent-heat storage material, cooling tool, cooler box, distribution packaging container, and cooling unit
  • Latent-heat storage material, cooling tool, cooler box, distribution packaging container, and cooling unit

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0057] [Composition of latent heat storage material]

[0058] The latent heat storage material of the present invention is a latent heat storage material containing a sodium chloride aqueous solution, which comprises: a sodium chloride aqueous solution with a eutectic concentration; and disodium hydrogen phosphate relative to the sodium chloride aqueous solution with a eutectic concentration It has an amount greater than the saturation concentration at 0°C.

[0059] The sodium chloride aqueous solution, which is the main heat storage agent of the latent heat storage material, has a eutectic concentration. Such as figure 2 As shown in the phase diagram, the sodium chloride aqueous solution has a single melting point near -21°C at the eutectic concentration (concentration at which only the eutectic of water and solute is formed during solidification), and the latent heat becomes the maximum at this time.

[0060] The disodium hydrogen phosphate contained in the latent heat storage ma...

Embodiment 1

[0076] Each of Example 1 and Comparative Example 1 maintained the temperature of the solution by endothermic phase (3h~6.5h), which is equivalent to melting, and the maintained temperature is around -21°C, which confirms the addition of disodium hydrogen phosphate The effect on the melting point is almost non-existent. In addition, there is almost no difference in the time until the temperature is completely melted and the temperature starts to rise with the temperature in the tester, which confirms that the decrease in the amount of latent heat due to the addition of disodium hydrogen phosphate is also almost not seen.

[0077] Picture 9 This is a table showing the melting points of Examples 1 and 2 and Comparative Example 1 obtained by experiments under the above-mentioned conditions. Even if disodium hydrogen phosphate was added to 4.0% by weight, the melting point hardly changed, and it was confirmed that the melting point of the main agent was not affected.

[0078] Picture...

no. 2 Embodiment approach

[0093] [Composition of cold storage]

[0094] This embodiment is an embodiment of a refrigerator using the cold storage appliance of the first embodiment. Figure 15A It is a cross-sectional view showing an example of refrigerator 400 of this embodiment. Refrigerator 400 includes refrigerating room 410 and cold storage device 100 of the first embodiment. In addition, refrigerator 400 includes an electric cooling device that cools the refrigerating compartment (not shown), and has a control temperature capable of freezing at least the cold storage device 100.

[0095] The refrigerator compartment 410 is provided in the inside of the refrigerator 400, and accommodates a cold preservation object. As a result, the electric cooling device is used to keep the cold storage object cold when energized, and the latent heat and sensible heat of the latent heat storage material 150 included in the cooling appliance 100 are used to keep the cold storage object cold when the energization is sto...

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Abstract

Provided is a latent-heat storage material containing a supercooling inhibitor which, when contained in an aqueous inorganic-salt solution containing sodium chloride, can separate out as crystals without fail upon cooling to inhibit supercooling and the inclusion of which little lowers the melting point or the quantity of latent heat. The latent-heat storage material contains an aqueous sodium chloride solution and comprises: the aqueous sodium chloride solution having a eutectic concentration; and disodium hydrogen phosphate contained in an amount not less than the saturation concentration at0 DEG C in the aqueous sodium chloride solution having the eutectic concentration. Due to this, the use of the latent-heat storage material containing the supercooling inhibitor, which can separate out as crystals without fail upon cooling to inhibit supercooling and the inclusion of which little lowers the melting point or the quantity of latent heat, makes it possible to keep cool by means of sufficient quantity of latent heat while inhibiting supercooling.

Description

Technical field [0001] The invention relates to a latent heat storage material, a cold preservation appliance, a refrigerator, a logistics packaging container and a cold preservation unit. Background technique [0002] Foods that require storage at a freezing temperature, such as frozen vegetables or meat, frozen processed foods, ice cream, etc., can be stored for a long period of time in an environment of -18°C or less with little loss of quality. Therefore, the above-mentioned food is stored in a refrigerator that can maintain a temperature below -18°C. However, during power failures or defrosting operations, etc., the temperature in the refrigerator rises during the period when the power to the refrigerator is stopped. Therefore, it is impossible to avoid the growth of microorganisms or food contamination. Quality reduction caused by melting. Therefore, a means for maintaining the refrigerator at -18°C or lower for a long period of time when energization is stopped is desired...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B65D81/18F25D3/00A23L3/37
CPCA23L3/363A23L3/37C09K5/066C09K5/06F28D20/02F25D3/00Y02E60/14Y02E70/30A23V2002/00B65D81/18
Inventor 势造恭平香村胜一本并哲内海夕香城户克也
Owner SHARP KK
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