What to do if the compressor of screw chiller is damaged

What to do if the compressor of screw chiller is damaged

The compressor is the core component of the chiller. Damage to the compressor is a very serious fault and needs to be dealt with in time, otherwise the chiller will not work. Today, the editor of okmarts.com will introduce the knowledge and process of handling damaged screw compressors.

　　 Screw chillers are mainly used in chemical industry, ink printing, large energy equipment, mixing plants, food preservation, central air conditioning and other industries. According to different heat dissipation methods, there are air-cooled screw chillers and water-cooled screw chillers. The compressors of screw chillers usually use Taiwan Hanbell or German Bitzer compressors. This type of compressor uses 5:6 super-efficient spiral rotor technology, which is 20-30% more energy efficient than general compressors. However, no matter how good the product is, it cannot be used forever. It will have a limited service life and may cause malfunctions due to improper operation. Then, what should we do when the screw chiller compressor is damaged and there is a problem? ?

First of all, we must analyze the reasons for the burning of the compressor: whether it is a temperature control quality problem such as the contactor and overloader in the control box; whether it is a setting value change or adjustment error; whether it is due to unstable power supply voltage; whether the operator follows the normal sequence Operation etc. It is important to confirm what the specific reason is, so as not to burn out after the new compressor is replaced.

　　 If it has been determined that the compressor is damaged and completely unusable, we should replace the compressor with a new one according to the following steps.

　　 1. Remove the filter drier, and use a temporary detachable pipe or copper pipe joint to catch the short connection

　　 2. Inject the cleaning agent into the pipeline system to clean the circulating flow, if necessary, the cleaning agent can be replaced for multiple cleanings

　　3. Dry the whole system. At this time, nitrogen with a pressure of 10kg/cm2 can be used to blow dry until there is no residual cleaning agent.

　　 4. Install a good compressor and filter drier, and use a nitrogen pressure of 10kg/cm2 to detect leaks. If there is no leakage, the remaining nitrogen can be discharged to the atmosphere through the high-pressure end angle valve

　　5. At the same time, vacuum from the high and low pressure ends to 1000micro, and then check all power supplies and electronic control systems

　　 6. Add liquid refrigerant and start the test after reaching 80%~90% of the refrigerant. (Note: The compressor needs to be heated for 2 hours)

　　 7. Replace the compressor refrigerating oil, and observe the oil consumption when the compressor is running.