Beverage apparatus and method

1. A beverage apparatus, comprising:

a pressure vessel configured to receive a flexible bag for containing a beverage;

a pressure release valve configured to be connected to the bag;

a pressure source connected to the pressure vessel, wherein the pressure source is configured to pressurize the pressure vessel using a gas;

a temperature adjustment device configured to adjust temperature within the pressure vessel independently of the pressure source; and

a controller comprising one or more processors and one or more memories storing instructions that are executable by the one or more processors and configured to:

control the temperature adjustment device to maintain a desired temperature within the pressure vessel according to a current mode of the apparatus, and

control the pressure source to achieve a desired pressure within the pressure vessel according to the current mode,

wherein the current mode is selected from a plurality of modes, wherein the modes comprise a fermenting mode, in which the controller is configured to control the temperature adjustment device to adjust the temperature within the pressure vessel to be within a first temperature range suitable for fermentation of the beverage, for a first predetermined period of time.

2. A beverage apparatus as claimed in claim 1 , wherein the modes comprise a conditioning mode, in which the controller is configured to:

control the temperature adjustment device to adjust the temperature within the pressure vessel to be within a second temperature range below the first temperature range, suitable for conditioning of the beverage, for a second predetermined period of time.

3. A beverage apparatus as claimed in claim 2 , wherein while in the conditioning mode the controller is configured to:

control the pressure source to achieve a desired conditioning pressure level within the pressure vessel.

4. A beverage apparatus as claimed in claim 3 , wherein while in the conditioning mode the controller is configured to:

determine the desired conditioning pressure level based at least in part on the temperature within the pressure vessel.

5. A beverage apparatus as claimed in claim 4 , wherein while in the conditioning mode the controller is configured to:

initiate control of the pressure source to achieve the desired conditioning pressure level on determining that the temperature within the pressure vessel has decreased from being within the first temperature range to a predetermined temperature.

6. A beverage apparatus as claimed in claim 4 , wherein the desired conditioning pressure level is proportional to the temperature within the pressure vessel.

7. A beverage apparatus as claimed in claim 2 , wherein the modes comprise a dispense mode, in which the controller is configured to:

control the temperature adjustment device to adjust the temperature within the pressure vessel to be within a third temperature range suitable for dispensing of the beverage; and

control the pressure source to maintain a dispensing pressure level within the pressure vessel.

8. A beverage system, comprising:

a beverage apparatus, comprising:

a pressure vessel configured to receive a flexible bag for containing a beverage;

a pressure release valve configured to be connected to the bag;

a pressure source connected to the pressure vessel, wherein the pressure source is configured to pressurize the pressure vessel using a gas;

a temperature adjustment device configured to adjust temperature within the pressure vessel independently of the pressure source; and

a controller comprising one or more processors and one or more memories storing instructions that are executable by the one or more processors and configured to:

control the temperature adjustment device to maintain a desired temperature within the pressure vessel according to a current mode of the apparatus, and

control the pressure source to achieve a desired pressure within the pressure vessel according to the current mode,

wherein the current mode is selected from a plurality of modes, wherein the modes comprise a fermenting mode, in which the controller is configured to control the temperature adjustment device to adjust the temperature within the pressure vessel to be within a first temperature range suitable for fermentation of the beverage, for a first predetermined period of time; and

a flexible bag containing a beverage, the bag positioned within the pressure vessel.

9. A beverage system as claimed in claim 8 , wherein the pressure vessel comprises a lid configured to be fitted to the pressure chamber,

wherein the bag comprises a spout made of more rigid material than the walls of the bag, configured to be attached to the lid such that at least a portion of the flexible walls of the bag lie against a surface of the lid facing the pressure chamber.

10. A beverage system as claimed in claim 9 , wherein the spout comprises a flange configured to bear against the surface of the lid facing the pressure chamber.

11. A beverage system as claimed in claim 8 , wherein an internal capacity of the bag is greater than an internal volume of the pressure vessel.

12. A method of brewing a beverage using the beverage system comprising a beverage apparatus, the apparatus comprising a pressure vessel configured to receive a flexible bag for containing a beverage, a pressure release valve configured to be connected to the bag, a pressure source connected to the pressure vessel and configured to pressurize the pressure vessel using a gas, a temperature adjustment device configured to adjust temperature within the pressure vessel independently of the pressure source, and a controller comprising one or more processors and one or more memories storing instructions that are executable by the one or more processors and configured to control the temperature adjustment device and the pressure source, the system further comprising a flexible bag configured to be positioned within the pressure vessel, and the method comprising the steps of:

positioning the bag within the pressure vessel;

connecting the bag to the pressure release valve;

mixing base ingredients and fermentation agent within the bag; and

controlling the temperature within the pressure vessel according to a current mode of the apparatus.

13. A method as claimed in claim 12 , comprising:

controlling, using the controller, the temperature adjustment device to adjust the temperature within the pressure vessel to be within a first temperature range suitable for fermentation of the beverage, for a first predetermined period of time.

14. A method as claimed in claim 13 , comprising:

on completion of the first period of time, controlling, the temperature adjustment device to adjust the temperature within the pressure vessel to be within a second temperature range below the first temperature range, suitable for conditioning of the beverage, for a second predetermined period of time.

15. A method as claimed in claim 14 , comprising:

controlling the pressure source to achieve a desired conditioning pressure level within the pressure vessel.

16. A method as claimed in claim 15 , comprising:

determining the desired conditioning pressure level based at least in part on the temperature within the pressure vessel.

17. A method as claimed in claim 15 , wherein controlling the pressure source to achieve a desired conditioning pressure level comprises initiating control on determining that the temperature within the pressure vessel has decreased from being within the first temperature range to a predetermined temperature.

18. A method as claimed in claim 16 , wherein the desired conditioning pressure level is proportional to the temperature within the pressure vessel.

19. A method as claimed in claim 14 , comprising:

controlling the temperature adjustment device to adjust the temperature within the pressure vessel to be within a third temperature range suitable for dispensing of the beverage; and

controlling the pressure source to maintain a dispensing pressure level within the pressure vessel.