A continuous boiling water preparation method based on gas-liquid two-phase object detection comprises a flow regulator, a heater, a temperature sensor, a two-phase object detection sensor and a controller; the flow regulator is used for injecting a cold water flow obtained from the outside into a water inlet of the heater; the heater heats up according to heating power provided by the controller; the two-phase object detection sensor and the temperature sensor are connected behind a water outlet of the heater, and when a boiling water flow flows through the two sensors, a gas-liquid ratio signal and a temperature signal are obtained respectively, and transmitted to the controller; and the controller transmits a signal indicating required heating power to the heater or transmits a signal indicating a required flow value to the flow regulator through calculation to execute output after receiving the gas-liquid ratio signal.

An electric kettle may include: a body receiving water or food therein; a lid configured to shield an open upper side of the body; a base provided at a lower side of the body and configured to support the body; a heating module provided in a side of the body and configured to apply heat to the body such that the content contained in the body is heated; and a handle provided at a side of the body and configured to be held by hand, wherein a control means is provided in the handle, the control means being configured to control power supplied to the heating module or to control a temperature of the content contained in the body. According to such a configuration of the electric kettle, there is an advantage in that the malfunction or failure of the electric kettle is prevented.

A device for preparing a beverage, including a body; a heat source; a sensing unit comprising at least a first temperature sensor; a control system; a user interface; and a means for vertically translating the sensing unit in upwards and downwards directions. A container is used with the device for preparing the beverage, where ingredients of the beverage are added to the container prior to actuating the device to begin preparation of the beverage.