Field of the Invention

The field of the invention pertains to beverage preparation and serving machines which typically use thermally conditioned liquid, such as heated and/or cooled liquid . The liquid is typically water or waterbased . The liquid may be a carrier and/or a solvent for preparing the beverage . The machine may be configured to prepare the beverage by mixing the liquid with a flavouring ingredient , e . g . a flavouring ingredient supplied in a solid form, of the beverage to be prepared .

The machine may be configured to handle a portioned flavouring ingredient . Therefore , typically a predetermined amount of consumable is preconditioned ( e . g . factory preconditioned) prior to introduction into the machine . One or a plurality of such preconditioned amounts of consumable are used for producing a single beverage serving by such machine .

For the purpose of the present description, a "beverage" is meant to include any human-consumable liquid substance , such as tea, cof fee , cacao , hot or cold chocolate , milk, soup, baby food, etc .

Background Art

Certain beverage preparation machines use capsules containing ingredients to be extracted or to be dissolved and/or ingredients that are stored and dosed automatically in the machine or else are added at the time of preparation of the drink . Some beverage machines possess filling means that include a pump for liquid, usually water, which pumps the liquid from a source of water that is cold or indeed heated through heating means , e . g . a thermoblock or the like .

Especially in the field of cof fee preparation, machines have been widely developed in which a capsule containing beverage ingredients is inserted in a brewing device . The brewing device is tightly closed about the capsule , water is inj ected at the first face of the capsule , the beverage is produced in the closed volume of the capsule and a brewed beverage can be drained from a second face of the capsule and collected into a receptacle such as a cup or glass .

EP2175762 discloses a brewing unit that includes on a support structure a seat with a rotation movement and a piston sliding in the seat as well as a counter-piston, which are movable between a loading configuration . Several brewing configurations for delimiting di f ferent brewing chamber volumes and an ej ection configuration are disclosed . The brewing unit has a first set of cam profiles fixed to the support structure and a second set of cam prof iles rotatable relative to the support structure , so that each movement of the seat , of the piston and of the counter-piston is controlled by the fixed cam profiles and by the movable cam profiles .

EP3253263 relates to a brewing unit for brewing bulk ground cof fee that has an infusion chamber cooperating with a closing piston and with an ej ection piston . For ej ecting the ground cof fee after its extraction with hot water, the ej ection piston is moved against the closing piston to squeeze the extracted ground cof fee prior to ej ecting the cake .

Summary of the Invention

The invention relates to a machine for preparing a beverage from at least one ingredient . Normally such beverage is then dispensed to a user, e . g . to a user-cup or user-mug .

The beverage preparation typically includes the mixing of a plurality of beverage ingredients for the infusion of a beverage ingredient , such as an infusion of ground cof fee or tea with water . For instance , a predetermined amount of beverage is formed and dispensed on user-request , which corresponds to a serving . The volume of such a serving may be in the range of 15 to 1000 ml such as 25 to 600 ml for instance 40 to 250 ml , e . g . the volume for filling a cup or mug, depending on the type of beverage . Formed and dispensed beverages may be selected from ristrettos, espressos, lungos, cappuccinos, cafe latte, americano coffees, teas, etc... For example, a coffee machine may be configured for dispensing espressos, e.g. an adjustable volume of 20 to 60 ml per serving, and/or for dispensing lungos, e.g. a volume in the range of 60 to 200 ml per serving, and/or for dispensing americanos, e.g. a volume in the range of 150 to 750 ml.

The machine of the invention is configured for handling a flavouring ingredient and preparing a beverage therefrom and serving such beverage via a dispensing outlet to a consumer receptacle, e.g. placed on a support. The beverage may be selected from coffee and tea and cacao. The beverage may be prepared by by infusing the ingredient with water from a water source e.g. a water tank and/or a connector to a water distribution network, for instance via a liquid driver such as a pump and/or via a thermal conditioner e.g. a water heater and/or a cooler.

The thermal conditioner may have a thermal power in the range of 300 to 3000 watt, for instance of 500 to 2300 watt, such as of 700 to 1800 watt, e.g. of 950 to 1500 watt.

The machine has an infusion unit that comprises a support, such as a frame and/or housing, that is stationary during the handling of the flavouring ingredient and optionally during beverage preparation and/or beverage serving.

The infusion unit includes a seat, such as a seat delimiting a substantially prismatic or cylindrical inner shape having a base that is for instance substantially circular or elliptic or ovoidal or polygonal. The seat has an ingredient opening, such as an ingredient opening configured to receive the flavouring ingredient unwrapped before mixing with the water.

The flavouring ingredient supplied into the ingredient opening may be in the shape of at least one solid portion of a self-supporting agglomerate of such flavouring ingredient, such as one solid portion or a discrete number of solid portions, e.g. 2 or 3 or 4 or 5 or 6 portions.

The flavouring ingredient may be supplied within a wrapping or without such wrapping into the machine. The ingredient may be supplied within the wrapping into the machine and then separated from the wrapping prior to mixing the flavouring ingredient with water, for example prior to its introduction into the ingredient opening. Examples of wrapped flavouring ingredients that can be unwrapped by the machine prior to mixing with water are disclosed in WO2019/219523 and EP2019217270.8.

The solid portion can have a rollable shape, e.g. a substantially spherical or ellipsoidal or cylindrical shape or a combination of parts of such shapes, with: a maximum dimension in the range of 15 to 35 mm such as 17.5 to 30 mm e.g. 20 to 27 mm; and/or a maximum dimension in the range of 10 to 90%, for instance 25 to 75% such as 40 to 65% e.g. 51 to 60%, of a maximum dimension of the base of the seat's inner shape.

The flavouring ingredient forming the solid portion can be for instance selected from ground coffee and tea and cacao, such as 4 to 12 g ground coffee e.g. 5 to 9 g ground coffee.

The solid portion may be configured to resist a compression force of at least 20 N such as at least 30, e.g. at least 40 N.

The solid portion may be configured to be crushed under a compression force of at most 150 N, for instance at most 135 N, such as at most 120 N, e.g. at most 115 N.

Such compression force necessary and sufficient for crushing the solid portion can be measured when the solid portion is squeezed between two parallel plates with the compression force applied to the plates.

The infusion unit has a closure part, for instance fixed to or integral with the seat or configured to close and open the ingredient opening of the seat. The closure part may be configured to form a lid on the opening. Further possible implementation details of such a closure part cooperating with the seat, e.g. a sealing thereof, are disclosed for example in EP2020187603 and EP2020187613 .

The infusion unit includes a wall part that is movable inside the seat.

For instance, the wall part is formed by a piston.

The wall part may be movable inside the seat by a wall part actuator, e.g. a motor.

The wall part can be dimensioned to be in sliding contact along and over inner boundaries of the inner shape of the seat at a seal that is stationary relative to the wall part and that seals the wall part against the inner shape.

Further possible implementation details of such a wall part cooperating with the seat, e.g. relative movements and/or actuations thereof, are disclosed for example in EP2020187598.

The seat, the closure part and the wall part are directly or indirectly mounted to the support, e.g. the wall part being carried by the seat and/or the wall part actuator (when present) being directly or indirectly fixed to the seat.

The seat, the closure part and the wall part are relatively movable between: a transfer configuration for supplying the flavouring ingredient into the seat and/or removing such ingredient upon beverage preparation; and a mixing chamber configuration in which the seat and the closure part and the wall part form a mixing chamber fluidically connected with the water source.

Further possible implementation details of such a closure part, wall part cooperating with the seat, e.g. relative movements and/or actuations thereof, are disclosed for example in EP2020187594 and EP2020187599.

The mixing chamber is associated with an inlet guide and an outlet guide. The inlet guide may be located in the closure part and the outlet guide may be located in the wall part or vice versa, or both inlet and outlet guides may be located in the closure part or in the wall part .

The outlet guide can be made of a flexible and/or rigid guide and/or associated with a filter.

The inlet guide may be associated with a water distributor, e.g. a water shower.

The infusion unit is configured such that, during beverage preparation, the flavouring ingredient is mixed with the water in the mixing chamber to form the beverage by infusion prior to serving thereof via the dispensing outlet and that. After the serving of the beverage via the dispensing outlet, at least part of the water contained in the mixing chamber is evacuated from the mixing chamber to at least partly dry the flavouring ingredient upon infusion prior to removal of such flavouring ingredient from the mixing chamber.

The mixing chamber may be associated with a thermal conditioner, e.g. a heater and/or cooler, for thermally (pre- ) conditioning the mixing chamber prior to infusion, typically when no water is supplied into the mixing chamber. Further possible implementation details of such a thermal conditioning are disclosed for example in EP2020187621 .

The seat may be moved relatively to the support by a seat actuator, such as a motor, that is fixed to the support or to the seat.

For example, the seat actuator can relatively move the support and the seat via a transmission. Such transmission may include at least one of: gears, for instance wheels, e.g. toothed wheels, and/or worms; levers e.g. levers connected by a knuckle joint; belts such as toothed belts; and racks such as toothed racks.

The seat actuator may be different to the wall part actuator and/or different to a remover actuator (e.g. as discussed below) . The closure part may be fixed relative to the support and the seat may be movable : against the closure part so as to close the ingredient opening by the closure part ; and away from the closure part so as to open the ingredient opening .

The closure part can be configured to cover a rim of the ingredient opening and/or to remain substantially outside the seat , when the seat is closed by the closure part .

The wall part and/or the abovementioned wall part actuator (when present ) can be mounted to follow movements of the seat . For example , the closure part and the seat are sealed of f by a seal .

The wall part and/or the wall part actuator can be mounted to follow the seat .

A control unit may be provided, such as a unit comprising at least one of a controller, processor, printed circuit board, memory, user-interface and power manager . The control unit may be completely incorporated into the machine or may be at least partly deported into a distant device via a communication channel , e . g . a wired and/or wireless network, for instance including one or more of computers and mobile devices , e . g . smart phones or tablets . The control unit may be used for carrying out user-requested processes ( e . g . beverage preparation and dispensing) and/or service processes ( e . g . cleaning and/or rinsing processes and/or maintenance processes and/or management of flavouring ingredient and/or water ) .

The infusion unit is configured to generate compressed gas , such as air, in the mixing chamber containing the flavouring ingredient upon infusion and to evacuate at least part of the water (possibly together with residual flavouring ingredient extracts ) contained in the mixing chamber with such compressed gas by releasing the gas from the mixing chamber .

Thereby, residues in the mixing chamber or downstream thereof are largely avoided and crosscontamination between beverage servings may be reduced or even substantially suppressed . Providing a short ( instead of a long) downstream line from the mixing chamber to the beverage outlet may further reduce the risk of crosscontamination .

The generation of the compressed gas in the mixing chamber can typically be achieved by : introducing compressed gas into the mixing chamber ; and/or introducing uncompressed or partly compressed gas into the mixing chamber and then compressing or further compressing the gas inside the mixing chamber, e . g . by collapsing and/or heating the mixing chamber .

The infusion unit may be configured to repeat once or several times the generating of compressed gas in the mixing chamber and evacuating of part of the water with the compressed gas from the mixing chamber . This is typically appropriate when a single water evacuation cycle is insuf ficient .

The infusion unit can be configured to inhibit or prevent an urging of the extracted flavouring ingredient against both the closure part and the wall part between the generating of the compressed gas in and its release from the mixing chamber . For instance , the closure part and/or the wall part is/are spaced, between the generating of such compressed gas in and its release from the mixing chamber, by a distance to the extracted flavouring ingredient of at least 1 mm, such as at least 2 . 5 mm, for example at least 4 mm e . g . at least 6 mm . This can be useful to avoid unnecessary dispersion of water and ingredient residues in the system especially inside the mixing chamber by limiting physical contact between chamber parts , e . g . the closure part , and the flavouring ingredient prior to ( at least partly) drying thereof .

The infusion unit may be configured to inhibit or prevent a removal of the water contained in the mixing chamber from the flavouring ingredient between the generating of the compressed gas in and its release from the mixing chamber . Typically, the mixing chamber can be sealed during the provision of the compressed gas for reasons of ef ficiency . After beverage dispensing, the water (with or without extracts of the flavouring ingredient ) can be evacuated from the mixing chamber to at least partly dry the flavouring ingredient upon infusion prior to removal of the flavouring ingredient from the mixing chamber . The evacuation under the ef fect of pressure is typically less likely to lead to residual and potentially contaminating liquid in the parts of the infusion unit exposed to the beverage or its constituents ( e . g . water and/or the flavouring ingredient to be infused) . It typically leads to removal of water, for instance together with flavouring ingredient extracts , from the flavouring ingredient and from the beverage exposed parts downstream of the mixing chamber and downstream thereof .

The infusion unit may be configured to release the compressed gas via the outlet guide so as to evacuate residual beverage from the outlet guide . For instance , the outlet guide is fluidically connected with an outlet valve for closing and opening the outlet guide , e . g . a solenoid valve and/or a pinch valve . The outlet valve can be closed when the compressed gas is contained in the mixing chamber and opened to release , via the outlet guide , the compressed gas with at least part of the water contained in the mixing chamber .

The dispensing outlet may be associated with a directing device configured to direct the beverage from the outlet guide to the consumer receptacle and residual liquid to a waste collector, e . g . via a draining edge of the directing device . For instance , the directing device is configured to direct at least part of the water evacuated from the mixing chamber by releasing the compressed gas to the waste collector or to the consumer receptacle .

The infusion unit may be configured such that after releasing the compressed gas the wall part is moved against the flavouring ingredient in the mixing chamber so as to compact the flavouring ingredient in the mixing chamber, optionally without further evacuating part of the water possibly still contained in the mixing chamber . The flavouring ingredient may be compacted in the mixing chamber : between and against both the closure part and the wall part ; and/or to undergo a volume reduction in the range of 5 to 75% such as 10 to 50% , e . g . 2 to 40% .

Thus , residual water in the flavouring ingredient may be used to assist clumping of the flavouring ingredient and be removed with the flavouring ingredient . Residual water poss ibly containing ingredient extracts can be inhibited from being disseminated after the gas release out of the flavouring ingredient and into any liquid guide downstream the chamber, whereby crosscontamination between successive beverage preparations and dispensing can be inhibited and possibly even prevented .

The infusion unit may be configured to evacuate , after the compressed gas is released, the flavouring ingredient to a or the above mentioned waste collector .

The flavouring ingredient may be moved by the wall part out of the mixing chamber e . g . via the ingredient opening .

The ingredient opening may be tilted, e . g . ( i f not initially tilted) by relatively moving the seat and the closure part and the wall part from the mixing chamber configuration to the trans fer configuration, to facilitate evacuation of the flavouring ingredient . The ingredient opening may be tilted relative to a hori zontal direction by an angle in the range of 5 to 80 deg . , such as of 15 to 75 deg . , for instance of 30 to 60 deg . , e . g . of 40 to 50 deg .

The ingredient opening can be associated with a remover, such as a pusher, that is configured to remove in a removal direction the flavouring ingredient from the ingredient opening towards the waste collector . The remover may be actuated by a or the abovementioned remover actuator .

Details of a suitable configuration of the seat , the closure wall and the wall part with the remover as well as the operation thereof are disclosed, for example , in EP2020187609 . The infusion unit may include a gas device for generating the compressed gas in the mixing chamber . Such device can have at least one of : a gas pump ; a compressed gas tank; and a or the abovementioned valve used as a gas valve .

The device may incorporate the gas pump that is fluidically connected to the mixing chamber via a dedicated inlet of the mixing chamber or via the inlet guide and/or the outlet guide . For instance , the gas pump is controlled by a or the abovementioned control unit .

The device can include a compressed gas tank that is fluidically connected through a or the abovementioned gas valve to the mixing chamber via a dedicated inlet of the mixing chamber or via the inlet guide and/or the outlet guide . For instance , the gas valve is controlled by a or the abovementioned control unit .

The gas device may include the gas valve that fluidically connects the mixing chamber and a gas source , such as ambient air e . g . at ambient pressure ( typically at about 1 bar ) , via a dedicated inlet of the mixing chamber or via the inlet guide and/or the outlet guide . The gas device may further include the wall part that is movable inside the seat . The gas valve and the wall part may be controlled by a or the abovementioned control unit . The wall part may be movable inside the seat to : expand the mixing chamber thereby drawing gas via the open gas valve into the mixing chamber ; and collapse the mixing chamber thereby compressing the gas in the mixing chamber when the gas valve is closed .

The infusion unit can be configured to generate the compressed gas in the mixing chamber at a maximum pressure of at least 0 . 5 above ambient pres sure ( e . g . atmospheric pressure ) , such as in the range of 1 to 30 bar, for instance 1 . 5 to 20 bar, e . g . 2 to 10 bar, for example 2 . 5 to 6 bar, above ambient pressure .

The infusion unit may be configured to release the compressed gas from the mixing chamber to evacuate at least part of the water from a or the abovementioned maximum pressure of the gas in the mixing chamber to a pressure of 0.1 bar above ambient pressure within a period of time of less than 3 sec., such as in the range of 0.001 to 2 sec., for instance in the range of 0.01 to 1 sec., for example in the range of 0.1 to 0.5 sec., e.g. in the range of 0.2 to 0.3 sec.

The abovementioned control unit can be configured to control a preconditioning of the flavouring ingredient after an introduction into the seat's ingredient opening in the transfer configuration of at least one solid portion of a self-supporting agglomerate of the abovementioned flavouring ingredient and subsequent relative movement from the transfer configuration into the mixing chamber configuration and prior to serving the beverage via the dispensing outlet.

One or more solid portions may be introduced into the ingredient opening prior to the preconditioning, each portion having a rollable shape, e.g. a substantially spherical or ellipsoidal or cylindrical shape or a combination of parts of such shapes, with: a maximum dimension in the range of 15 to 35 mm such as 17.5 to 30 mm e.g. 20 to 27 mm; and/or a maximum dimension in the range of 10 to 90%, for instance 25 to 75% such as 40 to 65% e.g. 51 to 60%, of a maximum dimension of the abovementioned base of the seat's inner shape.

The preconditioning of the flavouring ingredient may include: a portion break-up relative movement of the seat and the closure part and the wall part, such as by controlling the abovementioned or one or more actuators, e.g. motors, associated therewith; and/or a portion loosening supply of water from a or the abovementioned water source into the mixing chamber, such as by controlling a or the abovementioned liquid driver and optionally a or the abovementioned thermal conditioner.

The control unit can be configured to control via the abovementioned at least one actuator the abovementioned break-up relative movement between the wall part and the closure part so as to exercise a compression force onto the solid portion (s) between the closure and wall parts to break-up the solid portion (s) . The agglomerate flavouring ingredient can be selected from ground cof fee and tea and cacao , such as 4 to 12 g ground cof fee e . g . 5 to 9 g ground cof fee .

The control unit and the abovementioned at least one actuator may be configured such that the compression force is of at least 20 N, such as at least 30 N, for instance at least 40 N, optionally the compression force being of at most 200 N, such as at most 175 N, for instance at most 150 N, e . g . at most 125 N .

The control unit can be configured to control the break-up relative movement between the wall part and the closure part such that the closure and wall parts are relatively moved to one another between a break-up starting spacing at which the compression force is generated and a mixing spacing at which the abovementioned flavouring ingredient is mixed with the abovementioned water, whereby the mixing spacing and the break-up starting spacing have a ratio in the range of 0 . 1 to 0 . 8 such as 0 . 2 to 0 . 4 .

Further possible implementation details of such a preconditioning are disclosed for example in EP2020187623 .

The control unit , to control the preconditioning of the flavouring ingredient , may control the abovementioned liquid driver and optionally the abovementioned thermal conditioner e . g . for thermal conditioning to a temperature corresponding substantially to a water temperature during beverage preparation and serving of the beverage via the dispensing outlet , to supply the abovementioned portion loosening supply of water into the mixing chamber and then to interrupt the supply of water for a period of time , such as for 1 to 120 sec . for instance 5 to 60 sec . e . g . 10 to 30 sec . and/or at a pressure in the chamber that is substantially constant , prior to serving the beverage .

The control unit can be configured to control the supply into the mixing chamber of the abovementioned portion loosening supply of water : after and/or before carrying out the abovementioned portion break-up relative movement of the seat and the closure part and the wall part; and/or in a volume that is in a range of 3 to 85%, such as 5 to 50%, e.g. 10 to 25%, of a total volume of the mixing chamber at a spacing of the closure and wall parts when the beverage is prepared and served via the dispensing outlet; and/or at a or the abovementioned pressure in the mixing chamber that is in a range of 0.1 to 30 bar above ambient pressure, such as 0.5 to 25 bar above ambient pressure, for instance 1 to 20 bar above ambient pressure, e.g. 2.5 to 16 bar or 4 to 13 bar above ambient pressure; and/or while closing the outlet guide with a or the abovementioned outlet valve, such as: a resilient valve, e.g. a check-valve; and/or a valve controlled by the control unit, e.g. a solenoid valve and/or a pinch valve.

Further possible implementation details of such a preconditioning are disclosed for example in EP2020187592 .

The mixing chamber may be in fluid communication with a valve, such as at least one of the abovementioned valves, configured, e.g. controlled by a or the abovementioned control unit, to release pressure from the mixing chamber when containing the flavouring ingredient prior to driving the water into the mixing chamber for infusing the flavouring ingredient. Such valve may be assembled to or integral with the seat, the closure part, the wall part, the abovementioned inlet guide or the abovementioned outlet guide. The valve can be arranged to be open to release air from the chamber when the wall part and the closure part are relatively moved together. The valve may be arranged to be closed from a beginning of introduction of the water into the mixing chamber containing the flavouring ingredient to form the beverage and until serving thereof, for instance until completion of serving thereof. Using such a valve configuration can be beneficial when the volume of the mixing chamber is reduced due to a relative movement of the closure part and the wall part towards each other, especially when the mixing chamber is otherwise sealed of f prior to infusion . Further possible implementation details of such a valve arrangement are disclosed for example in EP2020187612 .

The invention also relates to a combination of a machine as described above and the abovementioned flavouring ingredient for preparing the beverage in the machine .

Another aspect of the invention relates to a method of handling a flavouring ingredient and preparing a beverage there from and serving the beverage via a dispensing outlet to a consumer receptacle . The method includes the steps of : providing a machine as described above ; supplying the flavouring ingredient into the seat in the trans fer configuration; in the mixing chamber configuration, infusing the ingredient by the water in the mixing chamber to form the beverage ; serving the beverage via the dispensing outlet ; and evacuating by the compressed gas at least part of the water contained in the mixing chamber to at least partly dry the flavouring ingredient .

A further aspect of the invention relates to a use of an ingredient as a flavouring ingredient : as a supply to a machine as described above ; for an implementation of a combination as described above ; or for an execution of a method as described above .

Brief Description of the Drawings

The invention will now be described with reference to the schematic drawings , wherein :

Figure 1 is a schematic view of a machine according to the invention;

Figure 2a schematically shows the infusion unit of Fig . 1 while dispensing the beverage ;

Figure 2b illustrates the infusion unit of Fig . 1 when the dispensing of the beverage is ended, before at least partly drying a wet extracted flavouring ingredient in the unit's mixing chamber;

Figure 2c illustrates an introduction of gas into the mixing chamber after the end of the beverage dispensing;

Fig. 2d shows the sealing of the mixing chamber after the introduction of gas thereinto;

Fig. 2e shows a compression of the gas in the mixing chamber;

Fig. 2f illustrates a release of the gas and evacuation of water, possibly beverage residues, from the mixing chamber;

Fig. 2g shows a compacting of the extracted flavouring ingredient in the mixing chamber after the release of the gas and the evacuation of water;

Fig. 2h illustrates the wall part moving the flavouring ingredient out of the mixing chamber; and

Fig. 2i shows a remover for removing the flavouring ingredient from the ingredient opening.

Detailed description

Figures 1 to 2i illustrate a non-limiting embodiment of a machine 1 and parts thereof (Fig. 1) as well as an operational sequence of such machine 1 according to the invention (Figs 2a to 2i) .

Machine 1 is configured for handling a flavouring ingredient 2 and preparing a beverage 7 therefrom and serving beverage 7 via a dispensing outlet 8 to a consumer receptacle 9, e.g. placed on a support 90, by infusing ingredient 2 with water 3 from a water source 3' , e.g. a water tank and/or a connector to a water distribution network, for instance via a liquid driver 4 such as a pump and/or via a thermal conditioner 5 e.g. a water heater and/or a cooler. Beverage 7 may be selected from coffee and tea and cacao.

Machine 1 has an infusion unit 10 that comprises a support 11, such as a frame and/or housing, that is stationary during the handling of flavouring ingredient 2 and optionally during beverage preparation and/or beverage serving .

Infusion unit 10 includes a seat 12 , such as a seat

12 delimiting a substantially prismatic or cylindrical inner shape having a base that is for instance substantially circular or elliptic or ovoidal or polygonal . Seat 12 has an ingredient opening 120 , such as an ingredient opening 120 configured to receive flavouring ingredient 2 unwrapped before mixing with water 3 .

Infusion unit 10 has a closure part 13 , for instance fixed to or integral with seat 12 or configured to close and open ingredient opening 120 of seat 12 . Closure part

13 may be configured to form a lid on opening 120 .

Infusion unit 10 includes a wall part 14 that is movable inside seat 12 . Wall part 14 may be at least one of : formed by a piston 14 ' ; movable ins ide seat 12 by a wall part actuator, e . g . a motor ; and dimensioned to be in sliding contact along and over inner boundaries of the inner shape of seat 12 at a seal 141 that is stationary relative to wall part 14 and that seals wall part 14 against the inner shape .

Seat 12 , closure part 13 and wall part 14 are directly or indirectly mounted to support 11 , e . g . wall part 14 being carried by seat 12 and/or wall part actuator 17 (when present ) being directly or indirectly fixed to seat 12 .

Seat 12 , closure part 13 and wall part 14 are relatively movable between : a trans fer configuration for supplying flavouring ingredient 2 into seat 12 and/or removing such ingredient 2 upon beverage preparation; and a mixing chamber configuration in which seat 12 and closure part 13 and wall part 14 form a mixing chamber 12 ' fluidically connected with water source 3 ' . See Figs 2a and 2 i .

Mixing chamber 12 ' is associated with an inlet guide 135 and an outlet guide 140 . Inlet guide 135 may be located in closure part 13 and outlet guide 140 may be located in the wall part 14 or vice versa, or both inlet and outlet guides may be located in the closure part or in the wall part.

Outlet guide 140 can be made of a flexible and/or rigid guide and/or associated with a filter 141.

Inlet guide 135 can be associated with a water distributor 136, e.g. a water shower.

Infusion unit 10 is configured such that, during beverage preparation, flavouring ingredient 2 is mixed with water 3 in mixing chamber 12' to form beverage 7 by infusion prior to serving thereof via the dispensing outlet 8. See Fig. 2a.

Infusion unit 10 is configured such that, after the serving of beverage 7 via dispensing outlet 8, at least part of water 3 contained in mixing chamber 12' is evacuated from mixing chamber 12' to at least partly dry flavouring ingredient 2' upon infusion prior to removal of flavouring ingredient 2' ' from mixing chamber 12' .

Seat 12 may be moved relatively to support 11 by a seat actuator, such as a motor, that is fixed to support 11 or to seat 12. The seat actuator can relatively move support 11 and seat 12 via a transmission, such as a transmission comprising at least one of: gears, for instance wheels, e.g. toothed wheels, and/or worms; levers e.g. levers connected by a knuckle joint; belts such as toothed belts; and racks such as toothed racks, for example the seat actuator being different to the abovementioned wall part actuator and/or different to a remover actuator (as discussed below) .

Closure part 13 can be fixed relative to support 11. Seat 12 may be movable: against closure part 13 so as to close ingredient opening 120 by part 13; and away from closure part 13 so as to open ingredient opening 120.

Closure part 13 may be configured to cover a rim of ingredient opening 120 and/or to remain substantially outside seat 12, when the seat 12 is closed by closure part 13. Closure part 13 and seat 12 may be sealed off by a seal 131. Wall part 14 and/or the wall part actuator (when present) may be mounted to follow seat 12.

Machine 1 can have a control unit C, such as a unit comprising at least one of a controller, processor, printed circuit board, memory, user-interface and power manager .

Infusion unit 10 is configured to generate compressed gas 7 ’ , such as air, in mixing chamber 12' containing flavouring ingredient 2’ upon infusion and to evacuate at least part of water 3 contained in mixing chamber 12' with such compressed gas 7' by releasing gas 7' from mixing chamber 12' . See Figs 2c to 2f .

Infusion unit 10 may be configured to repeat once or several times the generating of compressed gas 7' in mixing chamber 12' and evacuating of part of water 3 with such compressed gas 7' from mixing chamber 12' .

Infusion unit 10 can be configured to inhibit or prevent an urging of the extracted flavouring ingredient against both closure part 13 and wall part 14 between the generating of compressed gas 7' in and its release from mixing chamber 12' . For instance, closure part 13 and/or wall part 14 is/are spaced, between the generating of compressed gas 7' in and its release from mixing chamber 12' , by a distance to the extracted flavouring ingredient of at least 1 mm, such as at least 2.5 mm, for example at least 4 mm e.g. at least 6 mm.

See Figs 2e and 2f, in particular the gap between ingredient 2’ ,2’ ’ and closure part 13.

Infusion unit 10 may be configured to inhibit or prevent a removal of water 3 contained in mixing chamber 12' from flavouring ingredient 2’ between the generating of compressed gas 7' in and its release from mixing chamber 12' . See Figs 2b to 2e.

Infusion unit 12 may be configured to release compressed gas 7' via outlet guide 140 so as to evacuate residual beverage 7 from outlet guide 140. Outlet guide 140 can be fluidically connected with an outlet valve 142 for closing and opening outlet guide 142, e.g. a solenoid valve and/or a pinch valve. See Fig. 2f. Outlet valve 142 may be closed when compressed gas 7' is contained in mixing chamber 12' and opened to release via outlet guide 140 compressed gas with at least part of water 3 contained in mixing chamber 12' . See Figs 2c to 2f.

Dispensing outlet 8 can be associated with a directing device 80 configured to direct beverage 7 from outlet guide 140 to consumer receptacle 9 and residual liquid to a waste collector 91, e.g. via a draining edge 81 of directing device 80. Directing device 80 can be configured to direct at least part of water 3 evacuated from mixing chamber 12' by releasing compressed gas 7' to collector 91 or to consumer receptacle 9. See Fig. 1.

Infusion unit 10 may be configured such that after releasing compressed gas 7' wall part 14 is moved against flavouring ingredient 2' ' in mixing chamber 12' so as to compact flavouring ingredient 2' ' in mixing chamber 12' , optionally without further evacuating part of water 3 possibly still contained in mixing chamber 12' . Flavouring ingredient 2' ’ may be compacted in mixing chamber 12' : between and against both closure part 13 and wall part 14; and/or to undergo a volume reduction in the range of 5 to 75% such as 10 to 50%, e.g. 2 to 40%. See Fig. 2g.

Infusion unit 10 can be configured to evacuate after compressed gas 7' is released, flavouring ingredient 2’ ’ to a or the abovementioned waste collector 91. See Figs 2h and 2i.

Flavouring ingredient 2’ ’ may be moved by wall part 14 out of mixing chamber 12' e.g. via ingredient opening 120.

Ingredient opening 120 may be tilted, e.g. by relatively moving seat 12 and closure part 13 and wall part 14 from the mixing chamber configuration to the transfer configuration, to facilitate evacuation of flavouring ingredient 2’ ’ . Ingredient opening 120 may be tilted relative to a horizontal direction by an angle in the range of 5 to 80 deg., such as of 15 to 75 deg., for instance of 30 to 60 deg., e.g. of 40 to 50 deg. Ingredient opening 120 can be associated with a remover 20, such as a pusher, that is configured to remove in a removal direction 21 flavouring ingredient 2' ' from opening 120 towards waste collector 91.

Infusion unit 10 can have a gas device 14,137 for generating compressed gas 7' in mixing chamber 12' . The device may include at least one of: a gas pump; a compressed gas tank; and a or the abovementioned valve as a gas valve 137.

The device may have gas pump that is fluidically connected to mixing chamber 12' via a dedicated inlet of mixing chamber 12' or via inlet guide 135 and/or outlet guide 140. For instance, the gas pump is controlled by a or the abovementioned control unit C.

The device may include the compressed gas tank that is fluidically connected through a or the abovementioned gas valve to mixing chamber 12' via a dedicated inlet of mixing chamber 12' or via inlet guide 135 and/or outlet guide 140. For instance, the gas valve is controlled by a or the abovementioned control unit C.

Gas device 14,137 may include gas valve 137 that fluidically connects mixing chamber 12' and a gas source, such as ambient air e.g. at ambient pressure, via a dedicated inlet of mixing chamber 12' or via inlet guide 135 and/or outlet guide 140. Device 14,137 may further include wall part 14 that is movable inside seat 12. For instance, gas valve 137 and wall part 14 are controlled by a or the abovementioned control unit C. Wall part 14 may be movable inside seat 12 to: expand mixing chamber 12' thereby drawing gas 7' via open gas valve 137 into mixing chamber 12' ; and collapse mixing chamber 12' thereby compressing gas 7' in mixing chamber 12' when gas valve 137 is closed. See Figs 2b to 2e.

Infusion unit 10 can be configured to generate compressed gas 7' in mixing chamber 12' at a maximum pressure of at least 0.5 bar above ambient pressure (e.g. atmospheric pressure) , such as in the range of 1 to 30 bar, for instance 1.5 to 20 bar, e.g. 2 to 10 bar, for example 2.5 to 6 bar, above ambient pressure. See Fig. 2e .

Infusion unit 10 can be configured to release compressed gas 7' from mixing chamber 12' to evacuate at least part of water 3 from a or the abovementioned maximum pressure of gas 7' in mixing chamber 12' to a pressure of 0.1 bar above ambient pressure within a period of time of less than 3 sec., such as in the range of 0.001 to 2 sec., for instance in the range of 0.01 to 1 sec., for example in the range of 0.1 to 0.5 sec., e.g. in the range of 0.2 to 0.3 sec. See Fig. 2f.

After an introduction into the seat's ingredient opening 120 in the transfer configuration of at least one solid portion of a self-supporting agglomerate of flavouring ingredient 2 and subsequent relative movement from the transfer configuration into the mixing chamber configuration and prior to serving beverage 7 via dispensing outlet 8, the abovementioned control unit C can be configured to control a preconditioning of flavouring ingredient 2 by: a portion break-up relative movement of seat 12 and closure part 13 and wall part 14, such as by controlling one or more actuators 16,17, e.g. motors, associated therewith; and/or a portion loosening supply of water 3 from a or the abovementioned water source 3' into mixing chamber 12' , such as by controlling a or the abovementioned liquid driver 4 and optionally a or the abovementioned thermal conditioner 5.

Flavouring ingredient 2 can be introduced into chamber's opening 120 as one or more solid portions, each portion having a rollable shape, e.g. a substantially spherical or ellipsoidal or cylindrical shape or a combination of parts of such shapes, with: a maximum dimension in the range of 15 to 35 mm such as 17.5 to 30 mm e.g. 20 to 27 mm; and/or a maximum dimension in the range of 10 to 90%, for instance 25 to 75% such as 40 to 65% e.g. 51 to 60%, of a maximum dimension of the base of the seat's inner shape.

Control unit C may be configured to control via the abovementioned at least one actuator 17 the break-up relative movement between wall part 14 and closure part 13 so as to exercise a compression force F onto solid portion (s) between closure and wall parts 13,14 to breakup solid portion (s) 2.

For instance, the agglomerate flavouring ingredient is selected from ground coffee and tea and cacao, such as 4 to 12 g ground coffee e.g. 5 to 9 g ground coffee.

Control unit C and the abovementioned at least one actuator 17 can be configured such that compression force F is of at least 20 N, such as at least 30 N, for instance at least 40 N. Compression force F can be of at most 200 N, such as at most 175 N, for instance at most 150 N, e.g. at most 125 N.

Control unit C may be configured to control the break-up relative movement between wall part 14 and closure part 13 such that closure and wall parts 13,14 are relatively moved to one another between a break-up starting spacing at which compression force F is generated and a mixing spacing at which flavouring ingredient 2 is mixed with water 3. The mixing spacing and the break-up starting spacing may have a ratio in the range of 0.1 to 0.8 such as 0.2 to 0.4.

Machine 1 can have a sensor arrangement connected to control unit C for sensing the break-up starting spacing, control unit C being configured to determine the mixing spacing from the sensed break-up starting spacing and/or from monitoring an evolution of a required compression force F when closure and wall parts 13,14 are relatively moved to one another between the break-up starting spacing and the mixing spacing.

The sensor arrangement can be configured to determine at least one of: a power consumption of at least one actuator 17 e.g. by measuring an electric current and/or voltage consumed by such actuator (s) 17; and a volume and/or weight and/or number of portions supplied into ingredient opening 120 for a serving of beverage 7 via dispensing outlet 8.

Control unit C, to control the preconditioning of flavouring ingredient 2, may control the abovementioned liquid driver 4 and optionally the abovementioned thermal conditioner 5 e.g. for thermal conditioning to a temperature corresponding substantially to a water temperature during beverage preparation and serving of beverage 7 via dispensing outlet 8 (e.g. a water conditioning temperature that is within 3, 5 or 10°C of a beverage preparation temperature or a beverage serving temperature) , to supply the abovementioned portion loosening supply of water 3 into mixing chamber 12' and then to interrupt the supply of water 3 for a period of time, such as for 1 to 120 sec. for instance 5 to 60 sec. e.g. 10 to 30 sec. and/or at a pressure in mixing chamber 12' that is substantially constant, prior to serving beverage 7.

Control unit C can be configured to control the supply into mixing chamber 12' of the abovementioned portion loosening supply of water 3: after and/or before carrying out the abovementioned portion break-up relative movement of seat 12 and closure part 13 and wall part 14; and/or in a volume that is in a range of 3 to 85%, such as 5 to 50%, e.g. 10 to 25%, of a total volume of mixing chamber 12' at a spacing of closure and wall parts 13,14 when the abovementioned beverage 7 is prepared and served via dispensing outlet 8; and/or at a or the abovementioned pressure in mixing chamber 12' that is in a range of 0.1 to 30 bar above ambient pressure, such as 0.5 to 25 bar above ambient pressure, for instance 1 to 20 bar above ambient pressure, e.g. 2.5 to 16 bar or 4 to 13 bar above ambient pressure; and/or while closing the abovementioned outlet guide 140 with an outlet valve 142, such as: a resilient valve, e.g. a check-valve; and/or a valve controlled by control unit C, e.g. a solenoid valve and/or a pinch valve.

During operation of machine 1, flavouring ingredient 2 can be supplied into seat 12 in the transfer configuration. After seat 12 is brought into the mixing chamber configuration, ingredient 2 may be mixed with water 3 in mixing chamber 12' to form beverage 7 that may then be served via dispensing outlet 8. After serving beverage 7, at least part of water 3 contained in mixing chamber 12' may be evacuated by compressed gas 7' to at least partly dry flavouring ingredient 2’ .