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US 12,637,603 B2Granted
Cold storage material
AssigneeSharp Kabushiki Kaisha
InventorsYusuke Ikeda, Yuka Utsumi
Life of this patent
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Abstract
The disclosure is a cold storage material containing: a cold storage material main agent formed from water and a melting point adjuster; and a freezing point adjuster. The melting point adjuster includes a plurality of types of inorganic salts and an organic compound. Anions of the plurality of types of inorganic salts are all chlorine, and cations of the plurality of types of inorganic salts include at least sodium. The freezing point adjuster is a salt having a functional group that is identical to a cation included in any of the plurality of types of inorganic salts, and the salt has a temperature dependence of saturated solubility in pure water that decreases by 30% or more at a water temperature from 20° C. to 0° C.
Claims11
A cold storage material, comprising:
- a cold storage material main agent formed from water and a melting point adjuster;
- and
- a freezing point adjuster,
- wherein:
- the melting point adjuster includes a plurality of types of inorganic salts and an organic compound,
- anions of the plurality of types of inorganic salts are all chlorine,
- cations of the plurality of types of inorganic salts include at least sodium,
- the freezing point adjuster is a salt including a functional group that is identical to a cation included in any of the plurality of types of inorganic salts, the salt having a temperature dependence, of saturated solubility in pure water, that decreases by 30% or more at a water temperature from 20° C. to 0° C.,
- the organic compound is urea, and
- a difference between a main melting point and a solidification initiation temperature is within 5° C.
7 more elements
A cold storage material comprising:
- a cold storage material main agent formed from water and a melting point adjuster;
- and
- a freezing point adjuster,
- wherein:
- the melting point adjuster includes a plurality of types of inorganic salts and an organic compound,
- anions of the plurality of types of inorganic salts are all chlorine,
- cations of the plurality of types of inorganic salts include at least sodium,
- the freezing point adjuster is a salt including a functional group that is identical to a cation included in any of the plurality of types of inorganic salts, the salt having a temperature dependence, of saturated solubility in pure water, that decreases by 30% or more at a water temperature from 20° C. to 0° C.,
- a difference between a main melting point and a solidification initiation temperature is within 5° C.,
- a proportion of the cold storage material main agent in the cold storage material is from 1 to 18 wt. %,
- a proportion of the melting point adjuster in the cold storage material main agent is from 25 to 40 wt. %,
- the cations of the plurality of types of inorganic salts further include potassium and an ammonium group,
- the cold storage material main agent contains 5 to 25 wt. % of sodium chloride, 1 to 6 wt. % of potassium chloride, and 1 to 12 wt. % of ammonium chloride,
- a total amount of the plurality of types of inorganic salts in the cold storage material is from 13 to 35 wt. %,
- the organic compound is urea contained in an amount of 1 to 16 wt. % for 100 wt. % of the cold storage material, and
- the main melting point is from −27° C. to −32° C.
13 more elements
A cold storage material comprising:
- a cold storage material main agent formed from water and a melting point adjuster;
- and
- a freezing point adjuster,
- wherein:
- the melting point adjuster includes a plurality of types of inorganic salts and an organic compound,
- anions of the plurality of types of inorganic salts are all chlorine,
- cations of the plurality of types of inorganic salts include at least sodium,
- the freezing point adjuster is a salt including a functional group that is identical to a cation included in any of the plurality of types of inorganic salts, the salt having a temperature dependence, of saturated solubility in pure water, that decreases by 30% or more at a water temperature from 20° C. to 0° C.,
- a difference between a main melting point and a solidification initiation temperature is within 5° C.,
- a proportion of the cold storage material main agent in the cold storage material is from 8 to 12 wt. %,
- a proportion of the melting point adjuster in the cold storage material main agent is from 30 to 40 wt. %,
- the cations of the plurality of types of inorganic salts further include an ammonium group,
- the cold storage material main agent contains 10 to 18 wt. % of sodium chloride, and 5 to 10 wt. % of ammonium chloride,
- the contained sodium chloride is greater than the contained ammonium chloride,
- a total amount of the plurality of types of inorganic salts in the cold storage material is from 18 to 25 wt. %,
- the organic compound is urea contained in an amount of 8 to 12 wt. % for 100 wt. % of the cold storage material, and
- the main melting point is from −27° C. to −28° C.
14 more elements
Dependencies are inferred from the claim text.