The occurrence of liquid hammer in the chiller can cause damage to the scroll. The fault phenomenon is generally manifested as a significant metal impact sound inside the compressor, which is the impact of the metal fragments after the scroll is crushed against each other or with the compression. The sound of the casing hitting. What are the main reasons for the occurrence of liquid shock: a lot of refrigerant liquid enters the compressor at the moment of startup.
The flow rate of the evaporator is not good (the power saving load is reduced), and the compressor has a phenomenon of liquid backflow; the heat pump of the unit is not running well for defrosting, and many liquid refrigerants enter the compressor without evaporating, or the four-way valve reverses the instantaneous evaporator. The liquid enters the compressor, so how do we deal with the problem of liquid hammer or liquid backflow? Prompt you mainly from the following aspects to consider。
The pipeline design should prevent liquid refrigerant from entering the compressor when starting, especially the refrigeration system with a relatively large charge. Adding a gas-liquid separator to the compressor suction is a useful way to deal with this problem, especially in heat pump units using reverse cycle hot gas defrost.
Before starting the machine, long enough preheating of the compressor oil chamber can effectively prevent a lot of refrigerant from accumulating in the lubricating oil. It also has a certain role in preventing liquid shock. The flow protection of the water system cannot be lacked, so that it can protect the compressor when the water flow is not enough.
The above are a few small methods to solve the failure of the chiller, I hope it can be helpful to everyone. If you have any questions about refrigeration, you can contact us.