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1. WO2001074129 - GENERATEUR DE VAPEUR JETABLE POUR APPAREILS DOMESTIQUES A VAPEUR

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. Disposable steam generator (1) for domestic steam appliances, comprising a base (2), a hollow body

(3) made of heat-conducting material that defines a steam chamber (13) having an inlet for water (11) and an outlet for steam (12) , and at least one electric heating element (8), characterized by the fact that:
- said base (2) is designed to be attached permanently to the steam appliance and said hollow body (3) is designed for a rapid connection, in a replaceable manner, to the base (2) ,
- said at least one electric heating element (8) is attached to the base (2) ,
- said base (2) is also made of heat-conducting material and has a seat (7) ,
- the hollow body (3) has at least in part a shape complementary to that of said seat (7) in the base (2) and fits tightly, in close heat-transfer contact and in a releasable fashion, with and said seat (7) .
2. Steam generator according to claim 1, characterized by the fact that said hollow body (3) has, for the most part, a shape that is complementary to that of said seat (7) in the base (2) .
3. Steam generator according to claim 1 or claim 2, characterized by the fact that said seat is in the form of a deep cavity (7; 4 ' ; 4") .
4. Steam generator according to claim 3, characterized by the fact that said hollow body (3) and said cavity (7) in the base (2) both have a ring shape.

5. Steam generator according to claim 4, characterized by the fact that said ring-shaped cavity (7) in the base (2) is defined by a ring-shaped outer wall (4) and by an inner wall (5) , and by the fact that CO
said hollow body (3), when fitted into said ring-shaped cavity (7) , comes into close contact to ensure heat transfer essentially by conduction with said outer and inner walls (4,5) of the base (2) .
6. Steam generator according to claim 5, characterized by the fact that said ring-shaped cavity (7) in the base (2) is also delimited by a bottom (6), and by the fact that said hollow body (3) , when fitted inside said ring-shaped cavity (7) , also comes into contact with said bottom (6) in the base (2) for heat transfer essentially by conduction.
7. Steam generator according to claim 6, characterized by the fact that said at least one electric heating element (8) is incorporated in said bottom (6) in the base (2) .
8. Steam generator according to claim 6, characterized by the fact that said water inlet (11) and said steam outlet (12) are composed of axial tubular connectors projecting through corresponding axial holes (10) passing through the bottom (6) in the base (2) .
9. Steam generator according to any of the claims 5 to 8 , characterized by the fact that said inner wall in the base (2) is defined by a solid central element (5) .
10. Steam generator according to claim 9, characterized by the fact that said outer wall (4) , said solid central element (5) and said bottom (6) are composed of a single piece of a metal with a first thermal dilation coefficient, and said hollow body (3) is made of a metal with a second thermal dilation coefficient .
11. Steam generator according to claim 10, characterized by the fact that said first thermal dilation coefficient is greater than said second thermal dilation coefficient.
12. Steam generator according to one or more of the previous claims, characterized by the fact that said base (2) and said hollow body (3) have a circular cross-section.
13. Steam generator according to one or more of the previous claims, characterized by the fact that said hollow body (3) is designed for the application of an extractor device .
14. Steam generator (1') according to claim 3, characterized by the fact that said cavity (4') in the base (2') and said part (13') of the hollow body (3') are substantially conical in shape.
15. Steam generator according to claim 1, characterized by the fact that said seat (4') in the base (2') and said part (13') of the hollow body (3') are substantially cylindrical in shape.
16. Steam generator according to claim 1, characterized by the fact that said seat (4') in the base (2') and said part (13') of the hollow body (3') are substantially flat in shape.
17. Steam generator according to any of the claims 1, 14, 15 or 16, characterized by the fact that it also includes thrust means (15'; 12") designed to axially press said hollow body (3; 3'; 3") and said base (2; 2'; 2") against each other.
18. Steam generator according to claim 17, characterized by the fact that said thrust means (15'; 12") are elastic.
19. Steam generator according to claim 14, or claim 15, or claim 16, characterized by the fact that said at least one electric heating element (6') is incorporated underneath said seat or cavity (4 ' ) in the base (2 ' ) .
20. Steam generator according to any of the claims 14 to 19, characterized by the fact that said water inlet (ll1) and said steam outlet (12') are composed of axial tubular connectors projecting from said conical part (13') of the hollow body (3') for coupling with a watertight seal with the corresponding axial passages (5 ' ) in said base (2 ' ) .
21. Steam generator according to any of the claims 14 to 20, characterized by the fact that said base (2') is composed of a single piece of a metal with a first thermal dilation coefficient, and said hollow body (3') is made of a metal with a second thermal dilation coefficient .
22. Steam generator according to claim 21, characterized by the fact that said first thermal dilation coefficient is greater than said second thermal dilation coefficient.
23. Steam generator according to one or more of the claims 14 to 22, characterized by the fact that said base (2 ' ) and said hollow body (3 ' ) have a circular, square, elliptical or polygonal cross-section.
24. Steam generator (1") according to one or more of the previous claims, characterized by the fact said hollow body has a tranverse size much greater than its axial size.
25. Steam generator (1") according to one or more of the previous claims, in which said electric heating element (7") can be connected to a power supply source by means of normally-closed thermostatic safety switch means, characterized by the fact that said thermostatic switch means include a first thermostatic switch (15") with a first opening temperature threshold whose operation is associated with said water inlet (5"), and a second thermostatic switch (16") with a second opening temperature threshold, substantially higher than said first opening temperature threshold, operatively associated with said steam chamber (11").
26. Steam generator according to claim 25, characterized by the fact that said first opening temperature is between approximately 90 and 150 °C and said second opening temperature is approximately between 170 and 200 °C.
27. Household steam appliance comprising a steam generator (1") including a base (2"), a hollow body (3") made of heat-conducting material that defines a steam chamber (11") having an inlet for water (5") and an outlet for steam (6") , and at least one electric heating element (7"), in which said electric heating element (7") can be connected to a power supply source by means of normally-closed thermostatic safety switch means, characterized by the fact that said thermostatic switch means include a first thermostatic switch (15") with a first opening temperature threshold whose operation is associated with said water inlet (5"), and a second thermostatic switch (16") with a second opening temperature threshold, substantially higher than said first opening temperature threshold, operatively associated with said steam chamber (11") .
28. Household steam appliance according to claim 27, characterized by the fact that said first opening temperature is between approximately 90 and 150 °C and said second opening temperature is approximately between 170 and 200 °C
29. Household steam appliance according to claim 27 or claim 28, wherein said steam generator is according to any of claims 1-26.