Steam generating device provided with a hydrophilic coating
View Patent ↗A steam generating device includes a steam chamber provided with a hydrophilic coating. The hydrophilic coating includes an acid phosphate compound and boron, such as a salt of boron with a metallic element. T he coating promotes steaming and is resistant to flaking.
1. A steam generating device comprising:
a steam chamber; and
a hydrophilic coating located on a surface of the steam chamber, the hydrophilic coating comprising an acid phosphate compound, boron, and Al(H 2 PO 4 ) 3 .
2. The steam generating device, according to claim 1 , wherein the coating comprises a salt of boron with a metallic element.
3. The steam generating device according to claim 2 , wherein the metallic element is an alkali metal element.
4. The steam generating device according to claim 3 , wherein the alkali metal element is lithium and/or sodium.
5. The steam generating device of claim 2 , wherein a quantity of the salt of boron with the metallic element in the hydrophilic coating is between 1 and 40% by weight of a total composition of the hydrophilic coating.
6. The steam generating device of claim 2 , wherein a quantity of the salt of boron with the metallic element in the hydrophilic coating is between 5 and 30% by weight of a total composition of the hydrophilic coating.
7. The steam generating device of claim 2 , wherein a quantity of the salt of boron with the metallic element in the hydrophilic coating is between 8 and 20% by weight of a total composition of the hydrophilic coating.
8. The steam generating device of claim 2 , wherein a quantity of the salt of boron with the metallic element in the hydrophilic coating is between 8 and 20% by weight of a total composition of the hydrophilic coating.
9. A steam generating device comprising:
a steam chamber; and
a hydrophilic coating located on a surface of the steam chamber, the hydrophilic coating comprising an acid phosphate compound and boron,
wherein a quantity of a salt of boron with a metallic element in the hydrophilic coating is between 1 and 40% by weight of a total composition of the hydrophilic coating.
10. The steam generating device according to claim 1 , wherein the hydrophilic coating comprises silica particles.
11. The steam generating device according to claim 1 , wherein the hydrophilic coating comprises alumina particles.
12. A steam iron comprising a steam generating device according to claim 1 .
13. The steam generating device of claim 1 , wherein the hydrophilic coating composition comprises Al:P:B:Na in a ratio by weight of 1:3:1:0.31.
14. The steam generating device of claim 1 , wherein the hydrophilic coating composition comprises approximately equal amounts of Al and B.
15. The steam generating device of claim 1 , wherein the acid phosphate compound includes a metal-phosphate compound in which the phosphate is singly protonated.
16. The steam generating device of claim 1 , wherein the acid phosphate compound phosphate comprises one of MgHPO 4 and Zn(H 2 PO 4 ) 2 .
17. A method of producing a hydrophilic coating in a steam chamber of a steam generating device, the method comprising the acts of:
preparing a mixture of an acid phosphate compound, boron and Al(H 2 PO 4 ) 3 ;
introducing the mixture into the steam chamber; and
curing the mixture at an elevated temperature to form a hydrophilic coating.
18. The method according to claim 17 , wherein the mixture is brought to the elevated temperature by heating the steam chamber surface.
19. The method of claim 17 , wherein the coating comprises a salt of boron with a metallic element.
20. The method of claim 19 , wherein a quantity of the salt of boron with a metallic element in the steam promoter coating is between 1 and 40% by weight of a total composition of the hydrophilic coating.