Device for preparing hot beverages and method for preparing hot beverages using the device

A device for preparing beverages comprising:

• a closed compartment;
• an open compartment;
• an ascension pipe connecting the compartments, said ascension pipe having a lower orifice;
• and
• a filtering device between said ascension pipe and said open compartment,
• whereby said closed compartment includes a bottom, said bottom comprises:
• a large area having a bottom portion which defines a first level, and
• a small area smaller than said large area and having a bottom portion which defines a second level, said small area being around the lower orifice of the ascension pipe, said second level being at least below said first level of said large area, and said ascension pipe lower orifice defines a third level, said third level being below said first level,
• said closed compartment further includes a rim surrounding said large area and partially separating said large area from said small area, said rim defining a reservoir for holding a residual of liquid;
• an electrical heater that heats said large area;
• a switch device which controls said electrical heater;
• and
• a temperature sensor which controls said switch device.

A method for preparing beverages in which liquid is brought to a desired infusion temperature in a closed compartment and is forced by steam pressure through an ascension pipe and through a filtering device to an open compartment containing aromatic carriers, after which the steam from the residual of the liquid in the closed compartment condenses in the liquid in the open compartment heating the mixture of liquid and the aromatic carriers to the desired infusion temperature for some time, after which the closed compartment is allowed to cool thereby decreasing the pressure in the closed compartment so as to bring back the beverage by suction of the beverage through a filter and a pipe to the closed compartment leaving the residuals of the aromatic carriers in the open compartment comprising the steps of:

• i. using a heating means in a relatively large area for
• a. heating the liquid in the closed compartment, thereby increasing the pressure in said closed compartment and forcing the liquid to an open compartment and leaving a residual of liquid behind a rim surrounding a relatively large area equipped with the heating means,
• b. evaporating the residual of liquid behind said rim, thereby maintaining the pressure in the closed compartment by exhausting the steam through the ascension pipe to the open compartment, where the steam condenses in the mixture of liquid and aromatic carriers, heating the mixture to a desired infusion temperature, which is maintained until the evaporation is finished, the duration of which is decided by the volume of the residual of liquid, or the effective height of the rim enclosing the volume of liquid,
• c. heating the relatively large area of the closed compartment, thereby increasing the temperature until the temperature sensitive means reacts and switches the circuit supplying the heating means, and
• ii. switching of a circuit supplying the heating means of the relatively large area, thereby having the closed compartment,
• a. allowed to cool, decreasing the pressure in the closed compartment to a depression, which is used for
• b. performing a suction of the beverage from the open compartment through the filter and the ascension pipe to the closed compartment, and
• c. leaving the carriers of the aroma in the open compartment,
• iii. switching the heating means to a power state being sufficient to keep the beverage at the desired temperature.

A device for preparing beverages comprising:

• a closed compartment;
• an open compartment;
• an ascension pipe connecting the compartments, said ascension pipe having a lower orifice;
• and
• a filtering device between said ascension pipe and said open compartment,
• whereby said closed compartment includes a bottom, said bottom comprises:
• a large area having a bottom portion which defines a first level, and
• a small area smaller than said large area and having a bottom portion which defines a second level, said small area being around the lower orifice of the ascension pipe, said second level being at least below said first level of said large area, and said ascension pipe lower orifice defines a third level, said third level being below said first level,
• said closed compartment further includes a rim surrounding said large area and defining a reservoir for holding a residual of liquid,
• an electrical heater that heats said large area;
• a switch device which controls said electrical heater;
• a temperature sensor which controls said switch device;
• and
• means for varying an infusion time.

A device for preparing beverages comprising:

• a closed compartment;
• an open compartment;
• an ascension pipe connecting the compartments, said ascension pipe having a lower orifice;
• and
• a filtering device between said ascension pipe and said open compartment,
• whereby said closed compartment includes a bottom, said bottom comprises:
• a large area having a bottom portion which defines a first level, and
• a small area smaller than said large area and having a bottom portion which defines a second level, said small area being around the lower orifice of the ascension pipe, said second level being at least below said first level of said large area, and said ascension pipe lower orifice defines a third level, said third level being below said first level,
• said closed compartment further includes a rim surrounding said large area and defining a reservoir for holding a residual of liquid,
• an electrical heater that heats said large area;
• an electronic switch device which controls said electrical heater;
• a micro processor that controls said electronic switch device;
• and
• a temperature sensor which controls said switch device.