Frequent problems with ultrasonic cleaner transducers

 

1) The ultrasonic transducer is damp. Generally, it can be judged by checking the plug connected to the transducer with a megger, and checking the insulation resistance value between the positive and negative poles of the transducer. Generally, the insulation resistance should be greater than 30 megohms. If this insulation resistance value is not reached, it is likely that the transducer is damp. The repair method is to put the whole transducer (not including the plastic-sprayed shell) into the oven and set it to about 100℃, and dry it for three hours or use a hair dryer to remove moisture until the resistance is normal.

 

2) The transducer vibrator ignites, and the ceramic material is broken. It can be inspected with the naked eye and megohmmeter when repairing. Generally, as an emergency measure, individual damaged transducers can be disconnected without affecting the normal use of other transducers.

 

3) Degumming of the transducer. We know that most manufacturers use glue to fix the transducer, but after long-term use of the ultrasonic cleaner, degumming will occur due to vibration. Some manufacturers use the method of cementing and screw fastening. Under normal circumstances, there will be no degumming. Due to the action of screws, the vibrator will not fall from the vibrating surface after degumming. The general judgment method is to gently shake the tail of the vibrator by hand and observe the vibration carefully. Make a judgment based on the glue situation on the surface.

 

Generally, the output power of the ultrasonic power supply is normal after the vibrator is degummed, but because the vibrator is not connected to the vibrating surface, the vibration effect of the vibrating surface is not good, and the energy cannot be released after a long time, and the vibrator is likely to be burned. Vibrator degumming is troublesome for users to repair. Generally, they can only be returned to the manufacturer for repair. The most effective way to avoid degumming of the vibrator is to not hit the vibrating surface during normal use.

 

4) The vibration surface is perforated. Generally, ultrasonic transducers may experience perforation on the vibrating surface after a few years of full-load use. This is because the stainless steel plate on the vibrating surface is long-term

Frequent high-frequency vibration fatigue and perforation on the vibrating surface indicate that the service life of the transducer has been reached, and it can only be replaced in maintenance.

 

 

 

Frequent problems with ultrasonic cleaner generators

1) Turn on the power switch of the ultrasonic cleaner, and the indicator light is off. In this case, you must check whether the power switch is intact and whether the leakage switch is closed. If the switch is intact, check whether the fuse is overloaded and blown, it can basically be solved.

 

2) After the ultrasonic cleaner turns on the power switch, the indicator light is on, but there is no ultrasonic output. This situation is more complicated. When repairing, first check whether the connection plug between the transducer and the ultrasonic power board is loose, and then check whether the fuse is blown. If everything is normal, it may be caused by an internal failure of the ultrasonic power generator. Use a multimeter to make the power cord open and check whether the live wire is open. After troubleshooting the generator, check whether the ultrasonic transducer is burned out and whether it needs to be replaced.

 

3) The DC fuse of the ultrasonic cleaner is blown. It may be that the rectifier bridge stack or power tube is burnt out, or it may be that the transducer is aging and the current is unstable, which may cause the power generator to malfunction. Pay more attention when repairing.

 

4) After turning on the power switch of the ultrasonic cleaning machine, the machine has ultrasonic output, but the cleaning effect is not as ideal as before. This situation is mostly caused by improper use, such as improper cleaning liquid level in the cleaning tank, too high or too low; ultrasonic frequency coordination is not adjusted properly; the temperature of the liquid in the cleaning tank is too high or too low; the cleaning liquid is selected or used improperly not enough. Of course, it is not ruled out that after the transducer is degummed, most of the ultrasonic energy cannot be transmitted to the cleaning fluid. In this case, it should be sent back to the manufacturer for repair in time to avoid burning the vibrator.

 

Of course, the above are just some basic maintenance ideas for ultrasonic cleaners. In actual maintenance operations, a wealth of professional knowledge and practical experience are needed. The general service life of ultrasonic cleaners can basically be used for more than five to eight years.