The compressor is the core component of the chiller. Damage to the compressor is a serious failure and needs to be handled in time, otherwise the chiller will not work. Today I will introduce the knowledge and process of dealing with damaged screw compressors.

Screw type chiller is mainly used in chemical industry, ink printing, large energy equipment, mixing station, food preservation, central air conditioning and other industries. According to different heat dissipation methods, there are air-cooled screw chiller and water-cooled screw chiller. The screw chiller compressor is usually selected from Taiwan Hanbell or German Bitzer compressor. This type of compressor uses 5: 6 ultra-efficient spiral rotor technology, which is 20-30% higher than the general compressor. However, even the best product cannot be used continuously, it will have a limited service life, and it may cause failure due to improper operation. So what should we do when the screw chiller compressor is damaged and a problem occurs? ?

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

If it is determined that the compressor is damaged and completely unusable, we should follow the steps below to replace the new compressor.

1. Remove the drying filter and use a temporary detachable pipe or copper pipe joint to catch the shorting part.

2. Inject the cleaning agent into the piping system to clean the circulating flow. If necessary, replace the cleaning agent for multiple cleanings.

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

4. Install a good compressor and dryer filter, and use a nitrogen leak pressure of 10kg / cm2 at the same time. If it does not leak, you can exhaust the remaining nitrogen from the high-pressure end angle valve to the atmosphere.

5. At the same time evacuate from the high and low pressure side to 1000micro, and then check all power and electrical control systems.

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

7. Replace the refrigerating oil of the compressor, and observe the oil used during the compressor operation.

Source: Refrigeration Network

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