Introduction to the three most common classification methods of refrigeration compressors
The evaporation temperature of the single-stage refrigeration compressor is in the range of -45~10℃. Divided by evaporation temperature: -10~10℃ is a high-temperature compressor. -20~-10℃ is a medium temperature compressor, -45~-20℃ is a low temperature compressor. So pay attention when choosing compressors for refrigeration equipment.
1. According to the working principle
According to the working principle, it can be divided into two categories: volume type and speed type. The refrigeration compressor used in small refrigeration and air-conditioning equipment is a positive displacement type. Positive displacement compressor is to forcibly compress a certain volume of gas to reduce its volume and increase its pressure. It has two structural forms: piston type and rotary type. Rotary compressors have rolling rotor type, sliding vane type, scroll type, single screw type and twin screw type. The first three forms are often used in small refrigeration and air conditioning.
2. According to the evaporation temperature
The evaporation temperature of the single-stage refrigeration compressor is in the range of -45~10℃. Divided by evaporation temperature: -10~10℃ is a high-temperature compressor. -20~-10℃ is a medium temperature compressor, -45~-20℃ is a low temperature compressor. So pay attention when choosing compressors for refrigeration equipment.
3. According to the speed of the refrigeration compressor, there is no standard for dividing the limit according to the speed of the refrigeration compressor. However, it is customary to think that 900r/min or more is high speed, 300~900r/min is medium speed, and 300r/min or less is low speed. At present, my country's piston type multi-cylinder series, screw type, rolling rotor type and scroll type are all in the high speed range.
