DEVICE FOR ULTRASONIC CLEANING OF HEAT-EXCHANGING UNITS FROM DEPOSITS AND INTENSIFICATION OF TECHNOLOGICAL PROCESSES Russian patent published in 2015 - IPC F28G7/00 

FIELD: instrument engineering.

SUBSTANCE: device for ultrasonic cleaning of the heat-exchanging units from deposits comprises the power supply including a network filter, a full-wave rectifier connected to the terminals of the network filter, and a storage capacitor connected by the positive terminal to the cathodes of the diodes of the rectifier and by the negative terminal - to the anodes of the diodes of the rectifier, the power switching elements connected in a bridge circuit, at least two magnetostrictional transducers each of which comprises one excitation winding connected between the pairs of power switching elements through the switching capacitor of large capacitance, the sensor of current of power current pulses, consisting of a fixed resistor connected in parallel with a variable resistor connected at one end to the common bus and at the other end - to the common sources of power switching elements, the sensor of short circuit current, the control unit containing a setting crystal oscillator, a DC current source of magnetic biasing, the outputs of which are connected through the throttles to the excitation winding of magnetostrictional transducers, and the inputs - to the outputs of the storage capacitor. The sensor of short-circuit current comprises a non-saturable throttle connected in parallel with a diode connected at one end to the positive terminal of the storage capacitor and the other end - to the common drains of power switching elements, and a secondary measuring winding connected in parallel with the resistor connected at one end to the common bus, and the second end - to the input of the control unit.

EFFECT: improved stability of operation of the device, the intensification of technological processes.

3 cl, 3 dwg