Hot water and/or steam generator

• US 20070086758A1
• Filed: 10/13/2006
• Published: 04/19/2007
• Est. Priority Date: 10/14/2005
• Status: Abandoned Application

• Current Assignee: Rossi Corporation S.r.l., Rotfil S.r.l.
• Original Assignee: Brasilia SPA and VIA Praglia
• Inventors: Ravaglia, Mario, Rossi, Giampiero
• Application Number:
  US11/580,531
• Publication Number:
  US 20070086758A1
• Time in Patent Office: Days
• US Class Current: 392/441
• CPC Class Codes: A47J 31/542 Continuous-flow heaters
• CPC Class Codes: F24H 1/102 with resistance
• CPC Class Codes: H05B 3/0014 Devices wherein the heating current flows through particular resistances
• CPC Class Codes: H05B 3/60 Heating arrangements wherein the heating current flows through granular powdered or fluid material, e.g. for salt-bath furnace, electrolytic heating H05B3/38 takes precedence

Abstract

The hot water and/or steam generator comprises electrically powered heating means and a chamber for producing said water and/or steam in the shape of a hollow space, delimited by heating means in cooperation with a demarcation element, through which water flows while is heated

Claims

1. Hot water and/or steam generator comprising electrically powered heating means and a chamber for producing said hot water and/or steam, characterised in that said chamber is one defined by a hollow space, delimited by said heating means in cooperation with a demarcation element, through which water flows while is heated.

2. Generator according to claim 1, characterised in that said demarcation element has an inner cavity wherein said heating means are arranged.

3. Generator for heating water according to the previous claim, characterised in that said demarcation element comprises a tubular enclosure and said heating means comprises a cartridge heater arranged coaxially inside said tubular enclosure, said hollow space being defined between the outer side surface of said cartridge heater and the inner side surface of said enclosure.

4. Generator according to claim 1, characterised in that said tubular enclosure has a radial inlet for said water, obtained through the side wall thereof, and an axial outlet for said water and/or steam, obtained through a base thereof.

5. Generator according to claim 1, characterised in that said cartridge heater has a cylindrical central core for supporting at least one thread-like resistor wound as a spiral about the side surface of said core and incorporated in a tubular matrix exhibiting high properties of dielectric insulation and heat transmission, and a tubular skirt fitted on said tubular matrix and exhibiting high properties of thermal conduction and of resistance to thermal stress.

6. Generator according to claim 5, characterised in that the spatial distribution of the coils of said resistor is variable along the axial development of said core.

7. Generator according to claim 5, characterised in that said core is of magnesium oxide.

8. Generator according to claim 5, characterised in that said skirt is of metal.

9. Generator according to claim 5, characterised in that said matrix is of magnesium oxide.

10. Generator according to claim 1, characterised in that said heating means comprises a tubular enclosure on which a resistive circuit is printed, whereas said demarcation element is a mandrel arranged internally and coaxially to said tubular enclosure, said hollow space being defined between the inner side surface of said tubular enclosure and the outer side surface of said mandrel.

11. Generator according to claim 4, characterised in that said hollow space is free so as to convey said water from said inlet to said outlet along a conveying path that develops parallel to the axis of said hollow space.

12. Generator according to claim 4, characterised in that said hollow space internally has a helical conveyor adapted for conveying said water from said inlet to said outlet along a conveying path that develops helically about the axis of said hollow space.

13. A coffeemaker characterised in that it has a hot water and/or steam generator according to claim 1.

14. (canceled)