Latent heat cold storage material

Patent metadata

Field	Value
Publication number	US-9845420-B2
Application number	US-201615264907-A
Country	US
Kind code	B2
Filing date	Sep 14, 2016
Priority date	Oct 19, 2015
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

Provided is a latent heat cold storage material containing: water; a crystalline powder; and at least one inorganic salt. The crystalline powder is formed of a compound having a saturated concentration of less than 7.0 wt % to an aqueous solution of the inorganic salt having a concentration of 25 wt % at 25° C. A concentration of the crystalline powder exceeds a saturated concentration of the crystalline powder to the aqueous solution of the inorganic salt at 25° C.

First claim

What is claimed is:

1. A latent heat cold storage material comprising:
water;
a crystalline powder; and
at least one inorganic salt,
wherein the crystalline powder is 1,3-diethylurea,
the 1,3-diethylurea has a concentration of not less than 0.1 wt % and not more than 20 wt %, and
the latent heat cold storage material has a solidification starting point of not less than −30° C. and not more than −10° C.

2. The latent heat cold storage material according to claim 1 , wherein the inorganic salt includes sodium chloride.

3. The latent heat cold storage material according to claim 1 , wherein the inorganic salt includes potassium chloride.

4. The latent heat cold storage material according to claim 1 , wherein the inorganic salt includes sodium chloride and ammonium chloride.

5. The latent heat cold storage material according to claim 1 , wherein the inorganic salt includes potassium chloride and ammonium chloride.

6. A latent heat cold storage material comprising:
water;
a crystalline powder; and
at least one inorganic salt,
wherein the crystalline powder is 1,3-dibutylurea, and
the latent heat cold storage material has a solidification starting point of not less than −30° C. and not more than −10° C.

7. The latent heat cold storage material according to claim 6 , wherein the inorganic salt includes sodium chloride.

8. The latent heat cold storage material according to claim 6 , wherein the inorganic salt includes potassium chloride.

9. The latent heat cold storage material according to claim 6 , wherein the inorganic salt includes sodium chloride and ammonium chloride.

10. The latent heat cold storage material according to claim 6 , wherein the inorganic salt includes potassium chloride and ammonium chloride.

11. A latent heat cold storage material comprising:
water;
a crystalline powder; and
at least one inorganic salt,
wherein the crystalline powder is 1,3-dicyclohexylurea, and
the latent heat cold storage material has a solidification starting point of not less than −30° C. and not more than −10° C.

12. The latent heat cold storage material according to claim 11 , wherein the inorganic salt includes sodium chloride.

13. The latent heat cold storage material according to claim 11 , wherein the inorganic salt includes potassium chloride.

14. The latent heat cold storage material according to claim 11 , wherein the inorganic salt includes sodium chloride and ammonium chloride.

15. The latent heat cold storage material according to claim 11 , wherein the inorganic salt includes potassium chloride and ammonium chloride.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Machida Hironobu
• Suzuki Motohiro
• Takeguchi Shinsuke
• Shii Kentaro
• Suito Kazuaki

Classifications

• C09K5/063 Primary

  Materials absorbing or liberating heat during crystallisation; Heat storage materials · CPC title

• C09K5/066 Primary

  Cooling mixtures; De-icing compositions · CPC title

• Y02E60/14

  Thermal energy storage · CPC title