An ultrasonic cleaning device

Abstract

The application discloses an ultrasonic cleaning device, which comprises a cleaning tank, an ultrasonic cleaning module and a heating module; the ultrasonic cleaning module comprises an ultrasonic generator and an ultrasonic transducer, which are arranged in the cleaning tank; the heating module is used for heating liquid in the cleaning tank; the ultrasonic generator is used for converting a power frequency alternating current signal into a high frequency alternating current signal, and inputting the high frequency alternating current signal into the ultrasonic transducer; and the ultrasonic transducer is used for converting the received high frequency alternating current signal into ultrasonic waves and outputting the ultrasonic waves. The application realizes fast and complete cleaning of oil test supplies without manual cleaning, shortens the cleaning time and saves water, guarantees the reliability of measurement data and greatly improves work efficiency, so as to improve the accuracy and reliability of measurement.

Description

Technical Field

[0001] This invention relates to the field of cleaning technology for components used in testing of test electrodes or insulating oil, and more specifically, to an ultrasonic cleaning device. Background Technology

[0002] Insulating oil is one of the main media in electrical equipment, primarily serving functions such as insulation and heat dissipation. To ensure the normal and safe operation of electrical equipment, it is essential to conduct electrical performance tests on the insulating oil and obtain accurate data. During the testing process, the cleaning of the sampling and testing equipment directly affects the accuracy of the test data; therefore, cleaning these devices is crucial.

[0003] Currently, most cleaning methods involve manual cleaning using chemical detergents. During the cleaning process, the detergents generate a lot of foam, and some equipment is small and has irregular grooves on its surface, making it difficult to clean thoroughly.

[0004] Ultrasonic cleaning technology has been widely used in industrial precision cleaning, such as in the machinery industry: including the removal of rust-preventive grease, cleaning of measuring tools and cutting tools, degreasing and derusting of mechanical parts, cleaning of engine and automotive parts, and unclogging and cleaning of filters and screens; and in the surface treatment industry: including degreasing and derusting before electroplating, cleaning before ion plating, phosphating treatment, removal of carbon deposits, oxide scale, polishing paste, and surface activation treatment of metal workpieces. Industrial ultrasonic cleaning machines utilize an ultrasonic generator to produce a high-frequency signal, which is then converted into high-frequency mechanical oscillations by a mechanical vibrator. These oscillations propagate in the liquid of the cleaning tank through alternating dense and rarefaction zones. The ultrasonic waves collide with the surface of the workpiece in the cleaning solution, causing the contaminants on the workpiece surface to be dispersed, emulsified, and peeled off, thus achieving the cleaning purpose. During the entire cleaning process, the cleaning solution is heated, making it easier to remove contaminants from the workpiece surface. Since most ultrasonic cleaning is currently used in industrial manufacturing, its main parameters are set to meet industrial needs. The cleaning agent is generally large in size, and the ultrasonic generator is fixed on the cleaning tank. It has not been well applied to testing equipment, especially in the electrical performance testing of insulating oil.

[0005] Therefore, an ultrasonic cleaning device is needed to clean the components or equipment used in the electrical performance testing of insulating oil. Summary of the Invention

[0006] The present invention provides an ultrasonic cleaning device to solve the problem of how to clean components or equipment used in electrical performance testing of insulating oil.

[0007] To address the aforementioned problems, the present invention provides an ultrasonic cleaning device, comprising: a cleaning tank, an ultrasonic cleaning module, and a heating module; the ultrasonic cleaning module includes an ultrasonic generator and an ultrasonic transducer, disposed in the cleaning tank; the heating module is used to heat the liquid in the cleaning tank.

[0008] The ultrasonic generator converts the power frequency AC signal into a high frequency AC signal, and the high frequency AC signal is input to the ultrasonic transducer.

[0009] The received high-frequency AC signal is converted into ultrasonic waves and output through the ultrasonic transducer.

[0010] Preferably, the ultrasonic generator includes a high-frequency oscillator, a power amplifier, an inverter, and a power supply;

[0011] The high-frequency oscillator is connected to the power amplifier and is used to convert the power frequency AC signal into a high-frequency oscillation signal.

[0012] The power amplifier is connected to the inverter and is used to amplify the power of the high-frequency oscillation signal and convert the amplified high-frequency oscillation signal into a high-frequency AC signal.

[0013] The power supply is connected to the high-frequency oscillator and the power amplifier respectively, and is used to supply power to the high-frequency oscillator and the power amplifier.

[0014] Preferably, the high-frequency oscillator includes an externally excited circuit and a self-excited circuit;

[0015] The externally excited circuit is used to provide an externally excited signal so that the high-frequency oscillator can acquire a high-frequency oscillation signal.

[0016] The self-excited circuit is used to provide a self-excited signal so that the high-frequency oscillator can acquire a high-frequency oscillation signal.

[0017] Preferably, the externally excited circuit includes an integrated phase-locked loop circuit, with the third, fifth, and fourteenth pins of the integrated phase-locked loop circuit grounded; the sixth and seventh pins connected to the first and second ends of the oscillation capacitor, respectively; the ninth pin connected to the first voltage-controlled oscillator; the eleventh pin connected in sequence to the first oscillation resistor and the second voltage-controlled oscillator; the twelfth pin connected in sequence to the second oscillation resistor and the third voltage-controlled oscillator; and the fourth pin being a signal output terminal for outputting an externally excited signal.

[0018] Preferably, the self-excited circuit includes a current transformer, capacitors C1, C2, and C3, resistors R1, R2, and R3, diodes D1, D2, D3, D4, and D5, and a comparator.

[0019] The current transformer is connected in parallel with capacitor C1; the two ends of resistor R1 are connected to the first ends of capacitors C1 and C2 respectively, forming a π-type filter circuit; diodes D1, D2, D3, and D4 form a limiting circuit; the first end of capacitor C3 is connected to the first end of capacitor C2, and the second end of capacitor C3 is grounded; the cathode of diode D5 is connected to the second end of capacitor C2, and the anode of diode D5 is grounded; the first end of resistor R2 is connected to the anode of diode D4, and the second end of resistor R2 is grounded; the cathode of diode D3 is connected to the non-inverting input of the comparator, and the anode of diode D4 is connected to the inverting input of the comparator; the output of the comparator is connected to resistor R3.

[0020] Preferably, the oscillation frequency of the high-frequency oscillator is adjusted by adjusting the resistance values ​​of resistors R1 and R2, and the generated oscillation square wave signal is output from the fourth pin of the integrated phase-locked loop circuit.

[0021] Preferably, the oscillation frequency range is 20kHz to 35kHz.

[0022] Preferably, the output current of the inverter is sampled by the current transformer, the collected current signal is converted into a voltage signal through resistor R1, and the voltage signal is sent to the input terminal of the comparator; when the voltage difference between the input terminal and the inverting input terminal of the comparator is greater than a threshold, the inverter outputs a square wave signal.

[0023] Preferably, when the inverter has no output power, the high-frequency oscillator provides an externally excited signal through an externally excited circuit, so that the high-frequency oscillator can acquire a high-frequency oscillation signal;

[0024] When the inverter has output power, the output signal of the inverter is fed back to the high-frequency oscillator through the detection circuit, so that the high-frequency oscillator switches to the self-excited state. The high-frequency oscillator provides a self-excited signal through the self-excited circuit, so that the high-frequency oscillator can obtain a high-frequency oscillation signal.

[0025] Preferably, the ultrasonic cleaning module includes an ultrasonic generator and an ultrasonic transducer; the ultrasonic generator includes a high-frequency oscillator, a power amplifier, and an inverter.

[0026] The high-frequency oscillator is connected to the power amplifier and is used to convert the power frequency AC signal into a high-frequency oscillation signal.

[0027] The power amplifier is connected to the inverter and is used to amplify the power of the high-frequency oscillation signal and convert the amplified high-frequency oscillation signal into a high-frequency AC signal.

[0028] The received high-frequency AC signal is converted into ultrasonic waves and output through the ultrasonic transducer.

[0029] This invention provides an ultrasonic cleaning device, comprising: a cleaning tank, an ultrasonic cleaning module, and a heating module. The ultrasonic cleaning module includes an ultrasonic generator and an ultrasonic transducer, disposed within the cleaning tank. The heating module heats the liquid within the cleaning tank. The ultrasonic generator converts a power frequency AC signal into a high-frequency AC signal, which is then input to the ultrasonic transducer. The ultrasonic transducer converts the received high-frequency AC signal into ultrasonic waves and outputs them. This invention enables rapid and thorough cleaning of oil testing supplies (such as oil testing electrodes, oil bottles, syringes, etc.) without manual cleaning, shortening cleaning time and saving water. It ensures the reliability of measurement data and significantly improves work efficiency, thereby enhancing the accuracy and reliability of measurements. Attached Figure Description

[0030] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0031] Figure 1 This is a schematic diagram of an ultrasonic cleaning device according to a preferred embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the structure of an oscillating-amplifying ultrasonic generator is provided for the analog circuit according to a preferred embodiment of the present invention.

[0033] Figure 3 This is a schematic diagram of a phase-locked loop circuit integrated into a separately excited circuit according to a preferred embodiment of the present invention;

[0034] Figure 4 A schematic diagram of a self-excited circuit according to a preferred embodiment of the present invention; and

[0035] Figure 5 This is a schematic diagram of a power amplifier circuit according to a preferred embodiment of the present invention. Detailed Implementation

[0036] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0037] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0038] Figure 1 This is a schematic diagram of an ultrasonic cleaning device according to a preferred embodiment of the present invention. To facilitate faster and more effective cleaning of test electrodes and other related components or equipment used in insulating oil testing, thereby improving measurement accuracy and reliability, the present invention provides an ultrasonic cleaning device. Figure 1 As shown, the present invention provides an ultrasonic cleaning device, which includes: a cleaning tank, an ultrasonic cleaning module, and a heating module; the ultrasonic cleaning module includes an ultrasonic generator and an ultrasonic transducer, which are disposed in the cleaning tank; the heating module is used to heat the liquid in the cleaning tank.

[0039] The power frequency AC signal is converted into a high frequency AC signal by an ultrasonic generator, and the high frequency AC signal is input to the ultrasonic transducer.

[0040] The received high-frequency AC signal is converted into ultrasonic waves and output through an ultrasonic transducer.

[0041] Preferably, the ultrasonic generator includes a high-frequency oscillator, a power amplifier, an inverter, and a power supply;

[0042] The high-frequency oscillator is connected to the power amplifier to convert the power frequency AC signal into a high-frequency oscillation signal;

[0043] The power amplifier is connected to the inverter to amplify the power of the high-frequency oscillation signal and convert the amplified high-frequency oscillation signal into a high-frequency AC signal.

[0044] The power supply is connected to the high-frequency oscillator and the power amplifier respectively, and is used to supply power to the high-frequency oscillator and the power amplifier.

[0045] The present invention provides an ultrasonic cleaning device, comprising: a cleaning tank, an ultrasonic cleaning module, and a heating module; wherein, the ultrasonic cleaner is placed in the cleaning tank, and the heating module is placed at the bottom outside the cleaning tank for heating the water in the cleaning tank; the ultrasonic cleaning module includes an ultrasonic generator and an ultrasonic transducer, the ultrasonic generator is used to convert mains power into a high-frequency AC signal that matches the ultrasonic transducer, and the ultrasonic transducer is used to convert the high-frequency AC signal into ultrasonic waves and output them.

[0046] The ultrasonic generator of the present invention includes a high-frequency oscillator, a power amplifier, an inverter, and a power supply; the high-frequency oscillator is connected to the power amplifier and is used to convert the input mains power into a high-frequency oscillation signal; the power amplifier is connected to the inverter and is used to amplify the power of the high-frequency oscillation signal; the inverter is connected to the power amplifier and is used to convert the amplified high-frequency oscillation signal into a high-frequency AC signal; the power supply is connected to both the high-frequency oscillator and the power amplifier and is used to supply power to both the high-frequency oscillator and the power amplifier.

[0047] Preferably, the high-frequency oscillator includes an externally excited circuit and a self-excited circuit;

[0048] The externally excited circuit is used to provide an externally excited signal so that the high-frequency oscillator can acquire a high-frequency oscillation signal;

[0049] The self-excited circuit is used to provide a self-excited signal so that the high-frequency oscillator can obtain a high-frequency oscillation signal.

[0050] The high-frequency oscillator of the present invention includes an externally excited circuit and a self-excited circuit. The externally excited circuit is used to provide an externally excited signal so that the high-frequency oscillator obtains a high-frequency oscillation signal; the self-excited circuit is used to provide a self-excited signal so that the high-frequency oscillator obtains a high-frequency oscillation signal.

[0051] Preferably, the externally excited circuit includes an integrated phase-locked loop circuit, with the third, fifth, and fourteenth pins of the integrated phase-locked loop circuit grounded; the sixth and seventh pins are connected to the first and second terminals of the oscillation capacitor, respectively; the ninth pin is connected to the first voltage-controlled oscillator; the eleventh pin is connected to the first oscillation resistor and the second voltage-controlled oscillator in sequence; the twelfth pin is connected to the second oscillation resistor and the third voltage-controlled oscillator in sequence; and the fourth pin is a signal output terminal used to output an externally excited signal.

[0052] The externally excited circuit of the present invention includes an integrated phase-locked loop circuit, with the third, fifth and fourteenth pins of the integrated phase-locked loop circuit grounded; the sixth and seventh pins connected to the two ends of the respective oscillating capacitors; the ninth pin connected to the first voltage-controlled oscillator; the eleventh pin connected in sequence to the first oscillating resistor and the second voltage-controlled oscillator; the twelfth pin connected in sequence to the second oscillating resistor and the third voltage-controlled oscillator; and the fourth pin is a signal output terminal used to output an externally excited signal.

[0053] Preferably, the self-excited circuit includes a current transformer, capacitors C1, C2, and C3, resistors R1, R2, and R3, diodes D1, D2, D3, D4, and D5, and a comparator.

[0054] In this circuit, the current transformer is connected in parallel with capacitor C1; the two ends of resistor R1 are connected to the first ends of capacitors C1 and C2 respectively, forming a π-type filter circuit; diodes D1, D2, D3, and D4 form a limit circuit; the first end of capacitor C3 is connected to the first end of capacitor C2, and the second end of capacitor C3 is grounded; the cathode of diode D5 is connected to the second end of capacitor C2, and the anode of diode D5 is grounded; the first end of resistor R2 is connected to the anode of diode D4, and the second end of resistor R2 is grounded; the cathode of diode D3 is connected to the non-inverting input of the comparator, and the anode of diode D4 is connected to the inverting input of the comparator; the output of the comparator is connected to resistor R3.

[0055] The self-excited circuit of this invention includes a current transformer, capacitors C1-C3, resistors R1-R3, diodes D1-D5, and a comparator. The current transformer is connected in parallel with capacitor C1. The two ends of resistor R1 are connected to one end of capacitors C1 and C2 respectively, forming a π-type filter circuit. Diodes D1, D2, D3, and D4 form a limiting circuit. One end of capacitor C3 is connected to the other end of capacitor C2, and the other end of capacitor C3 is grounded. One end of diode D5 is connected to the other end of a capacitor, and the other end of diode D5 is grounded. One end of resistor R2 is connected to the anode of the diode, and the other end of resistor R2 is grounded. The cathode of diode D3 is connected to the non-inverting input of the comparator, and the anode of diode D4 is connected to the inverting input of the comparator. The output of the comparator is connected to resistor R3.

[0056] Preferably, the oscillation frequency of the high-frequency oscillator is adjusted by adjusting the resistance values ​​of resistors R1 and R2, and the generated oscillation square wave signal is output from the fourth pin of the integrated phase-locked loop circuit.

[0057] Preferably, the oscillation frequency range is 20kHz to 35kHz.

[0058] Preferably, the output current of the inverter is sampled by a current transformer, the collected current signal is converted into a voltage signal by a resistor R1, and the voltage signal is sent to the input of the comparator; when the voltage difference between the input of the comparator and the inverting input is greater than the threshold, the inverter outputs a square wave signal.

[0059] Preferably, when the inverter has no output power, the high-frequency oscillator provides an externally excited signal through an externally excited circuit, so that the high-frequency oscillator can acquire a high-frequency oscillation signal.

[0060] When the inverter has output power, the output signal of the inverter is fed back to the high-frequency oscillator through the detection circuit, so that the high-frequency oscillator switches to the self-excited state. The high-frequency oscillator provides a self-excited signal through the self-excited circuit, so that the high-frequency oscillator can obtain a high-frequency oscillation signal.

[0061] Preferably, the ultrasonic cleaning module includes an ultrasonic generator and an ultrasonic transducer; the ultrasonic generator includes a high-frequency oscillator, a power amplifier, and an inverter; the high-frequency oscillator is connected to the power amplifier to convert the power frequency AC signal into a high-frequency oscillation signal; the power amplifier is connected to the inverter to amplify the power of the high-frequency oscillation signal and convert the amplified high-frequency oscillation signal into a high-frequency AC signal; the ultrasonic transducer converts the received high-frequency AC signal into ultrasonic waves and outputs them.

[0062] This invention provides a rapid and thorough automatic removal of oil stains from the surfaces of insulating oil test electrodes and sampling bottles, eliminating the need for manual cleaning. It avoids damage to the surfaces of the insulating oil test electrodes and sampling bottles, and can be used with various cleaning agents, preventing any injury to operators due to hand contact. The cleaning tank, ultrasonic cleaning module, and heating module of this invention are designed as separate units for easy relocation.

[0063] The embodiments of the present invention enable rapid and thorough cleaning of oil testing supplies (such as oil testing electrodes, oil bottles, syringes, etc.) without the need for manual cleaning, shortening cleaning time and saving water, thus ensuring the reliability of measurement data and greatly improving work efficiency.

[0064] like Figure 1 As shown, the present invention provides an ultrasonic cleaning device, comprising: a cleaning tank, an ultrasonic cleaning module, and a heating module; wherein, the ultrasonic cleaner is placed in the cleaning tank, and the heating module is placed at the bottom outside the cleaning tank for heating the water in the cleaning tank; the ultrasonic cleaning module includes an ultrasonic generator and an ultrasonic transducer, the ultrasonic generator being used to convert mains power into a high-frequency AC signal that matches the ultrasonic transducer; the ultrasonic transducer being used to convert the high-frequency AC signal into ultrasonic waves and output them.

[0065] Embodiments of the present invention, such as Figure 2 As shown, the ultrasonic generator includes a high-frequency oscillator, a power amplifier, an inverter, and a power supply. The high-frequency oscillator is connected to the power amplifier to convert the input AC power into a high-frequency oscillation signal. The power amplifier is connected to the inverter to amplify the power of the high-frequency oscillation signal. The inverter is connected to the power amplifier to convert the amplified high-frequency oscillation signal into a high-frequency AC signal. The power supply is connected to both the high-frequency oscillator and the power amplifier to supply power to them.

[0066] The high-frequency oscillator of the present invention includes an externally excited circuit and a self-excited circuit. The externally excited circuit is used to provide an externally excited signal so that the high-frequency oscillator obtains a high-frequency oscillation signal; the self-excited circuit is used to provide a self-excited circuit so that the high-frequency oscillator obtains a high-frequency oscillation signal.

[0067] In daily cleaning operations, the ultrasonic transducer's output ultrasonic signal changes with external conditions. Therefore, to ensure the entire ultrasonic generator functions properly and achieves the expected efficiency, this invention creatively designs a high-frequency oscillator with adaptive functionality. When the equipment is first started, since the inverter has no output power, the high-frequency oscillator obtains a high-frequency oscillation signal through an externally excited signal provided by the externally excited circuit. After the inverter starts working, the detection circuit feeds back the inverter's output signal to the high-frequency oscillator, causing it to switch to a self-excited state. At this time, the self-excited circuit provides a self-excited signal, enabling the high-frequency oscillator to obtain a high-frequency oscillation signal.

[0068] Embodiments of the present invention, such as Figure 3 As shown, the externally excited circuit includes an integrated phase-locked loop (PLL) circuit. The third, fifth, and fourteenth pins of the PLL circuit are grounded; the sixth and seventh pins are connected to the two ends of the respective oscillation capacitors; the ninth pin is connected to the first voltage-controlled oscillator (VCO); the eleventh pin is connected to the first oscillation resistor and the second VCO in sequence; the twelfth pin is connected to the second oscillation resistor and the third VCO in sequence; and the fourth pin is the signal output terminal, used to output the externally excited signal.

[0069] In this embodiment of the invention, by adjusting the input voltage of the ninth pin, the externally excited circuit can function as a basic square wave oscillator. The oscillation capacitor C1 is connected between the sixth and seventh pins. The oscillation frequency of the oscillator can be adjusted by changing the resistance values ​​of the first oscillation resistor R1 and the second oscillation resistor R2. The oscillating square wave signal is output from the fourth pin, and its frequency is adjustable within the range of 20kHz (fmin) and 35kHz (fmax).

[0070] like Figure 4 As shown, the self-excited circuit of this embodiment includes a current transformer, capacitors C1-C3, resistors R1-R3, diodes D1-D5, and a comparator. The current transformer is connected in parallel with capacitor C1. The two ends of resistor R1 are connected to one end of capacitors C1 and C2 respectively, forming a π-type filter circuit. Diodes D1, D2, D3, and D4 form a limiting circuit. One end of capacitor C3 is connected to the other end of capacitor C2, and the other end of capacitor C3 is grounded. One end of diode D5 is connected to the other end of a capacitor, and the other end of diode D5 is grounded. One end of resistor R2 is connected to the anode of the diode, and the other end of resistor R2 is grounded. The cathode of diode D3 is connected to the non-inverting input of the comparator, and the anode of diode D4 is connected to the inverting input of the comparator. The output of the comparator is connected to resistor R3.

[0071] In this invention, the output current of the inverter is sampled by a through-hole current transformer. The feedback current signal is converted into a voltage signal by resistor R1 and sent to the input terminal of the comparator. When the voltage difference between the two input terminals of the comparator is greater than 1.4V, it outputs a square wave signal that reflects the phase information of the current. This signal is the 'self-excited signal'.

[0072] Figure 5 This is a schematic diagram of a power amplifier circuit, such as... Figure 5 As shown, this circuit is a half-bridge power amplifier circuit. Two high-voltage capacitors C1 and C2 with equal values ​​and large capacitance form a voltage divider circuit. When both power VMOS transistors Q1 and Q2 in the upper and lower arms are turned off, the voltage divider effect of the two capacitors C1 and C2 makes the voltage at the midpoint of C1 and C2 equal to half of the working input DC voltage VDC. To increase the pull-up current when VMOS transistors Q1 and Q2 are turned off, diodes D9 and D10 are connected in reverse parallel across the current-limiting resistors at the gates of the VMOS transistors. The very small forward resistance of the diodes increases the pull-up current. In the low-voltage drive circuit, a coupling transformer T1 is added, using a same-name terminal configuration to output a negative pulse signal, greatly increasing the pull-up current capability and enabling the VMOS transistors to turn off quickly. D2, D1, D6, and D5 form a surge protection system to achieve reliable circuit protection.

[0073] In daily cleaning operations, the ultrasonic transducer's output ultrasonic signal changes with external conditions. Therefore, to ensure the entire ultrasonic generator functions properly and achieves the expected efficiency, this invention creatively designs a high-frequency oscillator with adaptive functionality. When the equipment is first started, since the inverter has no output power, the high-frequency oscillator obtains a high-frequency oscillation signal through an externally excited signal provided by the externally excited circuit. After the inverter starts working, the detection circuit feeds back the inverter's output signal to the high-frequency oscillator, causing it to switch to a self-excited state. At this time, the self-excited circuit provides a self-excited signal, enabling the high-frequency oscillator to obtain a high-frequency oscillation signal.

[0074] The invention has been described with reference to a few embodiments. However, as will be known to those skilled in the art, and as defined in the appended claims, other embodiments besides those disclosed above fall equivalently within the scope of the invention.

[0075] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the art, unless otherwise expressly defined herein. All references to “a / the / the [device, component, etc.]” ​​are openly interpreted as at least one instance of said device, component, etc., unless otherwise expressly stated. The steps of any method disclosed herein need not be performed in the exact order disclosed unless explicitly stated otherwise.

Claims

1. An ultrasonic cleaning device, said device being used to clean components or equipment used in electrical performance testing of insulating oil, comprising: The cleaning tank, ultrasonic cleaning module, and heating module are designed as separate units; the ultrasonic cleaning module includes an ultrasonic generator and an ultrasonic transducer, which are disposed in the cleaning tank; the heating module is located at the bottom outside the cleaning tank and is used to heat the liquid in the cleaning tank. The ultrasonic generator converts the power frequency AC signal into a high frequency AC signal, and the high frequency AC signal is input to the ultrasonic transducer. The ultrasonic generator includes a high-frequency oscillator, a power amplifier, an inverter, and a power supply; The high-frequency oscillator is connected to the power amplifier and is used to convert the power frequency AC signal into a high-frequency oscillation signal. The high-frequency oscillator includes an externally excited circuit and a self-excited circuit. The externally excited circuit is used to provide an externally excited signal to enable the high-frequency oscillator to acquire a high-frequency oscillation signal. The self-excited circuit is used to provide a self-excited signal to enable the high-frequency oscillator to acquire a high-frequency oscillation signal. The power amplifier is connected to the inverter and is used to amplify the power of the high-frequency oscillation signal and convert the amplified high-frequency oscillation signal into a high-frequency AC signal. The high-frequency oscillator has an adaptive function. When the inverter has no output power, the high-frequency oscillator provides an externally excited signal through an externally excited circuit, enabling the high-frequency oscillator to acquire a high-frequency oscillation signal. When the inverter has output power, the output signal of the inverter is fed back to the high-frequency oscillator through a detection circuit, causing the high-frequency oscillator to switch to a self-excited state. The high-frequency oscillator provides a self-excited signal through a self-excited circuit, enabling the high-frequency oscillator to acquire a high-frequency oscillation signal. The power supply is connected to the high-frequency oscillator and the power amplifier respectively, and is used to supply power to the high-frequency oscillator and the power amplifier; The received high-frequency AC signal is converted into ultrasonic waves and output through the ultrasonic transducer. The externally excited circuit includes an integrated phase-locked loop circuit, with the third, fifth, and fourteenth pins of the integrated phase-locked loop circuit grounded; the sixth and seventh pins connected to the first and second terminals of the oscillating capacitor, respectively; the ninth pin connected to the first voltage-controlled oscillator; and the eleventh pin connected in sequence to the first oscillating resistor and the second voltage-controlled oscillator. The twelfth pin is connected in sequence to the second oscillation resistor and the third voltage-controlled oscillator; the fourth pin is the signal output terminal, used to output the externally excited signal; The self-excited circuit includes a current transformer, capacitors C1, C2, and C3, resistors R1, R2, and R3, diodes D1, D2, D3, D4, and D5, and a comparator. The current transformer is connected in parallel with capacitor C1; the two ends of resistor R1 are connected to the first ends of capacitors C1 and C2 respectively, forming a π-type filter circuit; diodes D1, D2, D3, and D4 form a limiting circuit; the first end of capacitor C3 is connected to the first end of capacitor C2, and the second end of capacitor C3 is grounded; the cathode of diode D5 is connected to the second end of capacitor C2, and the anode of diode D5 is grounded; the first end of resistor R2 is connected to the anode of diode D4, and the second end of resistor R2 is grounded; the cathode of diode D3 is connected to the non-inverting input of the comparator, and the anode of diode D4 is connected to the inverting input of the comparator; the output of the comparator is connected to resistor R3.

2. The device according to claim 1, wherein the oscillation frequency of the high-frequency oscillator is adjusted by adjusting the resistance values ​​of resistors R1 and R2, and the generated oscillation square wave signal is output from the fourth pin of the integrated phase-locked loop circuit.

3. The apparatus according to claim 2, wherein the oscillation frequency range is 20 kHz to 35 kHz.

4. In the device according to claim 1, the output current of the inverter is sampled by the current transformer, the collected current signal is converted into a voltage signal through resistor R1, and the voltage signal is sent to the input terminal of the comparator; when the voltage difference between the input terminal and the inverting input terminal of the comparator is greater than a threshold, the inverter outputs a square wave signal.

5. An ultrasonic cleaning module, comprising an ultrasonic generator and an ultrasonic transducer; the ultrasonic generator comprising a high-frequency oscillator, a power amplifier, and an inverter; the high-frequency oscillator comprising an externally excited circuit and a self-excited circuit; the externally excited circuit providing an externally excited signal to enable the high-frequency oscillator to acquire a high-frequency oscillation signal; the self-excited circuit providing a self-excited signal to enable the high-frequency oscillator to acquire a high-frequency oscillation signal; the externally excited circuit comprising an integrated phase-locked loop circuit, the third, fifth, and fourteenth pins of the integrated phase-locked loop circuit being grounded; the sixth and seventh pins being connected to the first and second terminals of oscillating capacitors respectively; the ninth pin being connected to a first voltage-controlled oscillator; the eleventh pin being connected sequentially to a first oscillating resistor and a second voltage-controlled oscillator; the twelfth pin being connected sequentially to a second oscillating resistor and a third voltage-controlled oscillator; the fourth pin being a signal output terminal for outputting an externally excited signal; the self-excited circuit comprising a current transformer, capacitors C1, C2, and C3, resistors R1, R2, and R3, diodes D1, D2, D3, D4, and D5, and a comparator; wherein, The current transformer is connected in parallel with capacitor C1; the two ends of resistor R1 are connected to the first ends of capacitors C1 and C2 respectively, forming a π-type filter circuit; diodes D1, D2, D3, and D4 form a limiting circuit; the first end of capacitor C3 is connected to the first end of capacitor C2, and the second end of capacitor C3 is grounded; the cathode of diode D5 is connected to the second end of capacitor C2, and the anode of diode D5 is grounded; the first end of resistor R2 is connected to the anode of diode D4, and the second end of resistor R2 is grounded; the cathode of diode D3 is connected to the non-inverting input of the comparator, and the anode of diode D4 is connected to the inverting input of the comparator; the output of the comparator is connected to resistor R3. The high-frequency oscillator is connected to the power amplifier and is used to convert the power frequency AC signal into a high-frequency oscillation signal; The power amplifier is connected to the inverter and is used to amplify the power of the high-frequency oscillation signal and convert the amplified high-frequency oscillation signal into a high-frequency AC signal. The received high-frequency AC signal is converted into ultrasonic waves and output through the ultrasonic transducer. The high-frequency oscillator has an adaptive function. When the inverter has no output power, the high-frequency oscillator provides an externally excited signal through an externally excited circuit, enabling the high-frequency oscillator to acquire a high-frequency oscillation signal. When the inverter has output power, the output signal of the inverter is fed back to the high-frequency oscillator through a detection circuit, causing the high-frequency oscillator to switch to a self-excited state. The high-frequency oscillator provides a self-excited signal through a self-excited circuit, enabling the high-frequency oscillator to acquire a high-frequency oscillation signal.

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