The internal filter core of the desiccant filter must be replaced regularly.
Change lubricant
After long-term operation, the oil quality of the unit deteriorates, with an increase in impurities and moisture within the oil. Therefore, it is necessary to regularly observe and inspect the oil quality. Any issues found should be addressed promptly, and the replacement oil must comply with the technical specifications.
Dry filter replacement
The desiccant filter is a crucial component ensuring the normal circulation of refrigerant. As water and refrigerant are immiscible, the presence of moisture in the system would greatly affect the unit's operational efficiency. Therefore, maintaining the system's dryness is vital, and the filter core inside the desiccant filter must be replaced regularly.
Electronic expansion valve for微量refrigerant adjustment
Micro-tuning of refrigerants with an electronic expansion valve ensures operation under partial and full load conditions. The heat bypass equipped, based on the compressor's inherent energy tuning, allows for adjustment. Most units are assembled as a whole at the factory and then charged with refrigerant.
After at least 8 hours of load test, ensures a single successful startup at the user's site. (The factory is equipped with a refrigerant test bench and a coolant test bench.) It is specifically designed for professional fields such as chemicals, beverage bottling, food processing, photovoltaics, and features a new generation of low-temperature freezing equipment that can actively adjust the temperature range from 30 degrees to minus 40 degrees.
Reasons for poor oil return in spiral chillers
Screw chillers presenting inefficient oil return is a headache. Generally, the main reason for the screw chiller's inefficient oil return in water-source heat pump maintenance companies is due to the mixture of lubricating oil and refrigerant gases during operation. Below, the chiller editor introduces the reasons, damages, and solutions for the screw chiller's inefficient oil return, hoping to provide a simple understanding of this issue.
Refrigerant and refrigeration compressor lubricants exhibit a solubility phenomenon during the operation of the refrigeration system, causing the lubricant in the refrigerant compressor to be discharged into the condenser in the form of mist and fine droplets. Poor performance of the oil separator or improper system design can result in inadequate separator function and inefficient return of the lubricant to the system.
Poor return oil in industrial chillers can lead to excessive lubricant accumulation in the evaporator piping, and when the oil film thickness increases by 0.1mm, it directly affects system cooling. On the other hand, for Tianjin geothermal heat pump maintenance companies, machines with insufficient oil cannot operate normally, requiring continuous lubricant replenishment, which leads to an ever-growing accumulation of lubricant in the evaporator, creating a cycle. This results in increased operating costs and reduced reliability for Tianjin geothermal heat pump maintenance and service. Generally, it is permissible for less than 1% of refrigerant gas flow to circulate with oil in the system.
What's causing the poor oil return in an industrial screw chiller? Just take a look and you'll see that there are two methods for the chiller compressor to return oil: one is using an oil separator for the return, and the other is using a return gas pipe. The oil separator is installed next to the compressor exhaust pipe and can generally separate out 50-95% of the oil, which is effective for oil return, fast, and can significantly reduce the amount of oil entering the system pipes, thus extending the time of operation without oil return.
