Patent ID: 9518760
Filing Date: 2016-12-13
CPC Classification: A47J,B08B,C02F,F24H

Claim Text:
1. A method of detaching limescale deposits from a beverage machine dispensing component of a beverage dispensing machine, the beverage dispensing machine component being selected from the group consisting of a water heater and a mixing chamber, the method comprising the steps of: memorizing a natural frequency of the water heater, in a memory means of a control unit; determining a frequency in a range of 20 kHz to 100 kHz inclusive; inducing ultrasonic vibrations at the determined frequency only if the determined frequency is other than equal to the memorized natural frequency of the water heater; selecting an increased or decreased frequency of an ultrasonic generator device if the determined frequency is equal to the memorized natural frequency of the water heater; inducing ultrasonic vibrations at the selected frequency to said beverage dispensing machine component or within water contained in the beverage dispensing machine component by powering the ultrasonic generator device for a preset time interval, yet controlling the ultrasonic generator device to avoid the natural frequency of the water heater by skipping the natural frequency of the water heater within the range of 20 kHz to 100 kHz inclusive during the inducing steps, and detaching said limescale deposits in response to the induced vibrations.