A coffee grinder has a housing that includes a ring burr, a shaft extending through the ring burr, a frustoconical burr, and an interlocking plug. An internal bore of the frustoconical burr has an upper cylindrical surface adjacent the top end, an interlocking portion adjacent the bottom edge, and a tapered side surface. The interlocking plug is shaped to extend through the internal bore of the frustoconical burr, and includes an upper cylindrical portion that fits through the upper cylindrical surface, and a lower portion that includes a sidewall surface which is also tapered such that the sidewall surface interlocks with the side surface of the frustoconical burr.

A mill for granular food including an adjuster attached to a barrel unit and rotatable relative to the barrel unit and to be prevented from coming off the barrel unit in an axis direction. A ground particle size for granular food is adjusted by rotating the adjuster. A movement attachment and detachment unit that inscribes an outer mill unit in the barrel unit and the adjuster, and makes the outer mill unit movable in the axis direction and makes the outer mill unit attachable and detachable. A rotary shaft extending from a rotary operation unit extends downward along a mill. An inner mill unit is attached to the rotary shaft. The adjuster is provided with a movement restricting unit that restricts movement of the inner mill unit to a predetermined position. Releasing the restriction makes the inner mill unit and the outer mill unit extractable.

A mill for granular food including an adjuster attached to a barrel unit and rotatable relative to the barrel unit and to be prevented from coming off the barrel unit in an axis direction. A ground particle size for granular food is adjusted by rotating the adjuster. A movement attachment and detachment unit that inscribes an outer mill unit in the barrel unit and the adjuster, and makes the outer mill unit movable in the axis direction and makes the outer mill unit attachable and detachable. A rotary shaft extending from a rotary operation unit extends downward along a mill. An inner mill unit is attached to the rotary shaft. The adjuster is provided with a movement restricting unit that restricts movement of the inner mill unit to a predetermined position. Releasing the restriction makes the inner mill unit and the outer mill unit extractable.

A dispenser for a first solid flowable material and a second flowable material, including an actuator for providing rotational motion on a shaft. A first reservoir holds the first material, and a second reservoir holds the second material. A metering unit selectively passes at least one of the first material and the second material. A grinder grinds the at least one of the first material and the second material passed by the metering unit.

A dispenser for a first solid flowable material and a second flowable material, including an actuator for providing rotational motion on a shaft. A first reservoir holds the first material, and a second reservoir holds the second material. A metering unit selectively passes at least one of the first material and the second material. A grinder grinds the at least one of the first material and the second material passed by the metering unit.

A coffee bean grinder includes a machine body and a burr grinder. The burr grinder is detachably mounted to the machine body, and includes an adjusting mechanism, and a grinding mechanism. The grinding mechanism is connected to the adjusting mechanism, and includes an inner burr that is rotatable about a grinding axis, and an outer burr that surrounds the inner burr, and that is rotatable about the grinding axis relative to the inner burr. The inner burr is movable by the adjusting mechanism along the grinding axis relative to the outer burr so as to adjust a space between the inner and outer burrs.

A coffee bean grinder includes a machine body and a burr grinder. The burr grinder is detachably mounted to the machine body, and includes an adjusting mechanism, and a grinding mechanism. The grinding mechanism is connected to the adjusting mechanism, and includes an inner burr that is rotatable about a grinding axis, and an outer burr that surrounds the inner burr, and that is rotatable about the grinding axis relative to the inner burr. The inner burr is movable by the adjusting mechanism along the grinding axis relative to the outer burr so as to adjust a space between the inner and outer burrs.

A cold brew coffee extraction device includes a container having a first chamber for receiving cold water. A filtering cup is mounted in the first chamber and includes a second chamber intercommunicating with the first chamber. The second chamber receives coffee powders and includes a second opening. The filtering cup further includes a third opening at a lower end thereof and receiving a filter. A first guiding tube includes a first end intercommunicating with the second chamber and a second end located outside of the container. A pump is disposed outside of the container and is connected to the second end of the first guiding tube. A controller is electrically connected to the pump to control operation of the pump to thereby supply air into or suck air out of the first guiding tube, thereby controlling a water level of the cold water in the first chamber.

A brewing system comprises a grinder, a brewer, a capsule holder, and a controller. The grinder is configured to grind whole coffee beans into coffee grounds with adjustable coarseness. The grinder is configured to receive the whole coffee beans through a first opening above the grinder and dispense the coffee grounds through a second opening below the grinder. The brewer is configured to dispense water for brewing coffee through a third opening below the brewer, wherein the brewer is positioned laterally relative to the grinder. The capsule dock is configured to (a) hold a capsule containing a coffee filter and (b) translate the capsule from a first position under the second opening of the grinder to a second position under the third opening below the brewer. The controller is configured to control the grinder, brewer, and capsule dock.

A brewing system comprises a grinder, a brewer, a capsule holder, and a controller. The grinder is configured to grind whole coffee beans into coffee grounds with adjustable coarseness. The grinder is configured to receive the whole coffee beans through a first opening above the grinder and dispense the coffee grounds through a second opening below the grinder. The brewer is configured to dispense water for brewing coffee through a third opening below the brewer, wherein the brewer is positioned laterally relative to the grinder. The capsule dock is configured to (a) hold a capsule containing a coffee filter and (b) translate the capsule from a first position under the second opening of the grinder to a second position under the third opening below the brewer. The controller is configured to control the grinder, brewer, and capsule dock.