초록 ▼

The invention relates to an appliance including an infusion chamber having an opening for receiving a fill, a closure part for said chamber, a water container connected to the chamber, pressurizing means for delivering air into the container, and control means suitable for causing a certain volume o

The invention relates to an appliance including an infusion chamber having an opening for receiving a fill, a closure part for said chamber, a water container connected to the chamber, pressurizing means for delivering air into the container, and control means suitable for causing a certain volume of water to be delivered from said container into said chamber, said pressurizing means being connected to a compression chamber that is arranged between said pressurizing means and said container and that includes inlet and outlet isolation means. According to the invention, with the water container full and the outlet isolation means including the control means, the control means is suitable for causing the compressed air to expand suddenly in the container and to flow with a curve of decreasing pressure. The invention is applicable to appliances for household use.

대표청구항 ▼

1. An appliance for preparing an infusion, the appliance comprising: a case, said case comprising (a) an infusion head containing a chamber with an opening through which a fill of substance for infusing can be inserted and presenting in its end wall a hot water feed nozzle, and that is fitted with a

1. An appliance for preparing an infusion, the appliance comprising: a case, said case comprising (a) an infusion head containing a chamber with an opening through which a fill of substance for infusing can be inserted and presenting in its end wall a hot water feed nozzle, and that is fitted with a closure part presenting an outflow orifice for the infusion, the closure part being movably mounted relative to said chamber to transition between two positions, an open position and a closed position, the open position corresponding to filling and emptying said chamber and the closed position corresponding to preparing the infusion with the closure part closing the chamber, and with a water container communicating with said nozzle, and (b) a body containing a pressurizing device having an active state or an inactive state and designed to be in the active state to deliver air in order to pressurize said water container, andcontrol means suitable for causing a certain volume of water raised to an infusion temperature to be delivered from said container into the infusion chamber,said pressurizing device being connected to a compression chamber that is arranged between said pressurizing device and said water container and that includes inlet and outlet isolation devices,wherein with the water container being full and the outlet device including the control means, the control means are suitable, when the pressurization device is placed in the inactive state, for causing compressed air to expand suddenly into said water-filled container and then to flow with a pressure curve that decreases down to the end of an infusion cycle,wherein the outlet isolation device includes an outlet nozzle connected to a duct leading to the water container and including the control means formed by an on/off type valve,wherein said on/off valve comprises a movable slider slidable in a two-port cylinder so as to occupy, starting from a rest state corresponding to closure of the outlet isolation of the compression chamber, a first port corresponding to delivering the air pressure into the container and beginning infusion, and a second port corresponding to stopping the delivery of air pressure to the container and thus stopping infusion, and connecting the container to the surrounding atmosphere. 2. The appliance according to claim 1, wherein said inlet isolation device includes an inlet passage containing a check valve. 3. The appliance according to claim 1, wherein the hot water feed nozzle includes a distribution grid with its outside face practically corresponding dimensionally with the inlet area of the face of the fill that is in contact with said grid. 4. The appliance according to claim 3, wherein the grid presents a plurality of holes with the sum of their sectional areas forming a fluid flow section occupying 10% to 25% of the area of the face of the fill, and preferably occupying 17%. 5. The appliance according to claim 3, wherein the water container is generally in the shape of a bell with its mouth engaging on the outside wall of the chamber, which outside wall presents, for this purpose, a shape that is complementary to the shape of the mouth of the container. 6. The appliance according to claim 1, wherein the body presents an oblong shape, with the head being located transversely thereon so that part of the body constitutes grip means, wherein the pressurizing device is a hand-operated air pump comprising a tube with a cylindrical wall that slidably receives a piston, the tube having a perforated end for passing the rod of the piston, which rod is connected to a handle, and an end including the inlet means, the compression chamber being arranged between said wall of the tube and the body that has an internal wall mounted in leaktight manner with the wall of the tube. 7. The appliance according to claim 6, wherein the internal wall of the body is cylindrical and arranged coaxially about the tube, and the compression chamber is suitable for receiving at least one volume element for adjusting the capacity of said chamber. 8. The appliance according to claim 7, wherein the volume element is constituted by a ring placed around the tube. 9. The appliance according to claim 6, wherein the valve is arranged on the body in the grip means and close to the head and comprises a pushbutton projecting from the case so as to be suitable for being controlled by the thumb of the user. 10. The appliance according to claim 9, wherein the valve comprises a movable slider connected to the pushbutton and slidable in a two-port cylinder so as to occupy, starting from a rest state corresponding to first closure of the outlet isolation device of the compression chamber, a first port corresponding to delivering the air pressure into the container and beginning infusion, and a second port corresponding to stopping the delivery of air pressure to the container and thus stopping infusion, and connecting the container to the surrounding atmosphere. 11. The appliance according to claim 1, wherein the container is removably mounted on a frame secured to the case, thereby enabling containers of different capacities to be fitted. 12. The appliance according to claim 2, wherein the duct including the control means and leading from the outlet nozzle to the water container presents a diameter that is substantially equal to 0.3 mm, in full or in part. 13. The appliance according to claim 1, wherein the outlet isolation device is connected to a duct which opens out vertically into a top portion of the water container.