Method for preparing a food liquid from a food substance contained in a receptacle by passing water through the substance using centrifugal forces comprising: driving the receptacle in centrifugal rotation while introducing water in the capsule,passing water through the substance to form a food liqu
Method for preparing a food liquid from a food substance contained in a receptacle by passing water through the substance using centrifugal forces comprising: driving the receptacle in centrifugal rotation while introducing water in the capsule,passing water through the substance to form a food liquid,collecting the centrifuged food liquid,wherein the receptacle is a single-use capsule and,a flow restriction means is arranged within the flow path of the centrifuged liquid.
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1. A system for preparing a food liquid from a food substance contained in a single-use capsule by passing water through the substance in the capsule using centrifugal forces and passing the centrifuged food liquid along a flow path, the system comprising: a single-use capsule containing a food subs
1. A system for preparing a food liquid from a food substance contained in a single-use capsule by passing water through the substance in the capsule using centrifugal forces and passing the centrifuged food liquid along a flow path, the system comprising: a single-use capsule containing a food substance;a device for removably receiving the capsule, the capsule having a central axis with the food substance surrounding the central axis, and the device comprising means for centrifugally rotating the capsule around an axis of rotation (I) that aligns with the central axis of the capsule, so that water introduced into the capsule during centrifugal rotation of the capsule passes along a flow path from a central portion of the capsule through the food substance;flow restriction means arranged in the flow path of the centrifuged food liquid for providing a pressure drop of at least 0.5 bar of relative pressure during centrifugation, the flow restriction means comprising a valve which opens or enlarges a liquid passage when a sufficient pressure of the centrifuged liquid in the capsule is exerted on the valve so that the liquid food can be released from the capsule and out of the device; andwherein the valve is formed by at least one engaging portion of the device which moves relative to another engaging portion of the capsule under the effect of the pressurized centrifuged liquid for making the passage for the food liquid. 2. The system of claim 1, wherein the capsule has at least one outlet for the centrifuged food liquid, and the valve is arranged in the flow path adjacent the at least one outlet of the capsule for providing a pressure drop of between 1 and 6 bar of relative pressure during centrifugation. 3. The system of claim 2, wherein the valve opens or enlarges a passage in response to increasing pressure of centrifuged liquid so that the food liquid can exit the capsule through the passage. 4. The system of claim 1, wherein at least one of the engaging portions is spring loaded to move away relative to the other engaging portion under the effect of the pressurized centrifuged liquid. 5. The system of claim 1, wherein the engaging portion of the system includes a spring loading member comprising a rubber elastic member or at least one mechanical spring and, the engaging portion associated with the capsule comprises an annular pressing edge formed by an annular rim of the capsule which is arranged to seal on the engaging portion of the system and is deflectable to move away from the engaging portion of the system under the effect of the pressurized fluid. 6. The system of claim 1, wherein the engaging portion of the system is fixed in position and the engaging portion of the capsule is deflectable under the effect of the pressurized centrifugal liquid. 7. A liquid food preparation device for preparing a liquid food from a food substance contained in a single-use, removably insertable capsule in the device, by passing water through the substance using centrifugal forces and passing the centrifuged food liquid along a flow path, the device comprising: water injection means for introducing water in the capsule, wherein the capsule has a central axis with the food substance surrounding the central axis,means for positioning and centering the capsule along an axis of rotation (I) that aligns with the central axis of the capsule,means for centrifugally rotating the capsule around the axis of rotation (I) so that water introduced into the capsule along the central axis during centrifugal rotation of the capsule passes along a flow path the central axis of the capsule through the food substance, andflow restriction means arranged in the flow path of the centrifuged food liquid for providing a pressure drop of at least 0.5 bar of relative pressure during centrifugation, the flow restriction means comprising a valve which opens or enlarges a liquid passage when a sufficient pressure of the centrifuged liquid is exerted on the valve so that the liquid food can be released from the capsule and out of the device,wherein the valve is formed by at least one engaging portion of the device which moves relative to another engaging portion of the capsule under the effect of the pressurized centrifuged liquid for making the passage for the food liquid. 8. The device of claim 7, wherein the valve is arranged in the flow path for providing a pressure drop of between 1 and 6 bar of relative pressure during centrifugation prior to opening or enlarging the liquid passage. 9. The device of claim 8, wherein the valve is calibrated or adjusted to selectively open a liquid passage through the device in response to increasing pressure of centrifuged liquid so that the food liquid can exit the capsule and the device through the passage. 10. The device of claim 8, wherein at least one of the engaging portions is spring loaded to move away relative to the other engaging portion under the effect of the pressurized centrifuged liquid. 11. The device of claim 8, wherein the engaging portion of the device includes a spring loading member comprising a rubber elastic member or at least one mechanical spring, the engaging portion associated with the capsule comprises an annular pressing edge formed by an annular rim of the capsule which is arranged to seal on the engaging portion of the device and is deflectable to move away from the engaging portion of the device under the effect of the pressurized fluid. 12. The device of claim 7, wherein the capsule has at least one outlet for the exit of the food liquid, a collecting recess adjacent the at least one outlet of the capsule, and a pierceable cover over the at least one outlet and the recess, and the device further comprises a water injection assembly for injecting water in the capsule and comprising at least one piercing member that is substantially aligned with the central axis of the capsule and is placed to pierce the pierceable cover of the capsule. 13. The device of claim 12, wherein more than one piercing members are placed to pierce the cover in a plurality of locations and are spaced apart on an upper surface of the capsule close to a sidewall surface. 14. The device of claim 12, which includes a collecting surface adjacent the valve into which the centrifuged food liquid passing through the valve can impact to slow its velocity. 15. The system of claim 1, further comprising water injection means for introducing water in the capsule along its central axis.
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