What are the common faults of refrigeration compressors in laser chillers?

In a laser chiller, the refrigeration compressor is the heart of the entire refrigeration system and the most important one. Its main function is to compress the low-temperature and low-pressure gas from the evaporator into high-temperature and high-pressure gas, providing the source power for the entire refrigeration cycle. As the usage time increases, refrigeration compressors are also prone to some malfunctions. Let's take a look at some common faults of refrigeration compressors.

1. High compressor temperature
The reasons for high compressor temperature include: wear and tear on internal components of the refrigeration system; The refrigeration system is out of oil; Excessive oil or refrigerant; Capillary tube too long, etc.

2. Abnormal noise from the compressor
There are foreign objects in the cylinder; Wear of bearings and cylinders; Excessive refrigerant and pulsating noise can cause abnormal noise in the compressor.

3. The compressor vibrates heavily
Structural errors in the refrigeration system, resonance between the unit and the pipeline, and excessive oil or refrigerant can cause significant compressor vibration.

4. The compressor does not start
Possible reasons include: incorrect wiring; Low voltage; Damaged starting capacitor; The relay or contactor does not close; Open circuit of starting winding; Lack of phase.

5. The compressor starts and stops repeatedly due to overload protection action
Possible causes: Low voltage or three-phase imbalance; Other electrical equipment is connected to the overload protector; Overload protector malfunction; The operating capacitor is too small; Excessive exhaust pressure; Short circuit between windings, etc.

6. Low compressor efficiency
Long usage time; The internal components of the compressor are severely worn, and the clearance between various components is large; The decrease in sealing performance of the gas valve results in a decrease in actual exhaust volume.

Source: coolingstyle