Analysis and Solution of Frosting on the Compressor of Laser Chiller

The compressor is an important component of a laser chiller, which increases its temperature by compressing the refrigerant. Subsequently, the refrigerant releases heat through the condenser, causing its temperature to decrease and enter the evaporator. In the evaporator, the refrigerant absorbs heat and lowers its temperature before entering the compressor cycle again. However, during actual operation, we may encounter frosting in the low-pressure part of the chiller compressor. What is the reason for this?

1. Insufficient refrigerant charge or refrigerant leakage. If there is a lack of refrigerant in the laser chiller, the compressor cannot increase the gas pressure to normal operating pressure, which can cause water to condense and frost at low temperatures. At this time, we need to determine whether the insufficient refrigerant is due to insufficient charging or leakage. If it is due to insufficient charging, only an appropriate amount of refrigerant needs to be added. If there is a refrigerant leakage, we need to contact the chiller manufacturer to assist in finding the leakage point and repairing it.

2. The expansion valve is too small or blocked. This will reduce the refrigerant supply volume, lower the evaporation temperature of the chiller, and the refrigerant will continue to evaporate in the return pipe and compressor, leading to frost formation in the compressor. In this case, only adjust the size of the expansion valve and clean it.

3. Poor ventilation. If the space where the chiller is placed is relatively closed and the ventilation effect is poor, it will result in poor heat exchange efficiency of the evaporator, low ambient temperature, and frost formation of water. Therefore, we need to ensure that the chiller is used in an open and well ventilated environment.

4. The components of the chiller have dust accumulation or scaling. For example, if there is dirt or dust accumulation in evaporators, condensers, filters, etc., it can affect the heat exchange effect of the chiller, leading to compressor frosting. The chiller must be cleaned regularly during use to keep its components clean and tidy during operation.

There are many reasons for the frosting of the laser chiller compressor, and the above are some common reasons and solutions. We hope to be helpful to everyone. It is recommended that if your chiller compressor experiences frosting, first check if the chiller has sufficient refrigerant to ensure that there are no faults in the internal parts of the chiller, and regularly clean the chiller to ensure the normal operation of the system. If the frosting problem of your chiller is serious, Please contact a professional for inspection and repair.

Source: Coolingstyle