Patent ID: 8764911
Filing Date: 2014-07-01
Classification: B08B

Abstract:
1. An ultrasonic wave generating apparatus for preventing scale from being produced in a pipe and removing the same from the pipe, the ultrasonic wave generating apparatus comprising: a generator including an electric power supply, a controller that generates a control signal according to a program stored therein, a liquid crystal display (LCD) indicator, and a transducer drive circuit; and transducer portions that convert an electric signal into an ultrasonic signal, respectively, wherein the generator comprises: the controller having an internal memory or a port to which an external memory is inserted, and formed of a microcomputer to control the generator and the transducer portions according to the program stored in the internal memory and the external memory; thyristor portions that are arranged respectively in the front and rear ends of the transducer portions, in which two thyristors are connected in series in the respective thyristor portions; snubber circuit portions that are connected in parallel with the respective thyristor portions, to thereby protect each thyristor from transient voltage that is generated by circuit inductance in the ultrasonic wave generating apparatus, and suppress a voltage rising rate when the thyristor is turned off to thus accomplish circuit stability; at least one to at maximum nine transducers that are connected with the controller and are included in the transducer portions; and choke coils that are connected with one end of the respective transducers in the transducer portions and protects the circuit from surge reverse voltage that is generated during operation of the transducers, and wherein the ultrasonic wave generating apparatus is programmed to operate according to the program stored in the controller after three seconds after electric voltage is applied to the ultrasonic wave generating apparatus, in order to secure stability of the ultrasonic wave generating apparatus.