The invention provides an ultra high-speed preparation method and a device for tea making water. The method comprises the steps of: setting flow and each-stage
electric power; dividing a
water body heating curve of a pipeline heater into a quickly-heated
linear region and a slowly-heated nonlinear region; leading the pipeline heater to work in the controllable nonlinear region and keep away from the
linear region by a master control board; heating up the water which is fed into the pipeline heater; obtaining the water with a target
water temperature from a water outlet; installing an outlet
water temperature sensor at the water outlet; computing, tracking and compensating the
water temperature decrease caused by the characteristic drift and the air injection since the pipeline heater works for a long time by the master control board; automatically adjusting the
electric power by a heating body sensor according to the heating curve when the water is heated up; and precisely controllingthe water temperature at the water outlet at + / -2 DEG C. After the tea making water is prepared by the method and the device, and the phenomena that the temperature rise is too fast, the water is highly burnt, and the
water cluster is broken caused by the hysteretic response speed of the heating body sensor are thoroughly eradicated, so that the water can be used for making the tea which is mellow, fragrant, sweet and good in
aroma and taste, and therefore, the device is a substitute for upgrading and updating the existing water dispenser.