How much does temperature affect semi-hermetic refrigeration compressors?

The impact of temperature on semi-hermetic refrigeration compressors is mainly reflected in the performance, efficiency and service life of the compressor. Semi-hermetic refrigeration compressors are widely used in refrigeration and air-conditioning systems. Their working principle is to compress low-temperature and low-pressure refrigerants into high-temperature and high-pressure gases through compressors to achieve refrigeration effects. The following are several key aspects of the impact of temperature on them.

The ambient temperature directly affects the suction temperature and exhaust temperature of the compressor. In a high temperature environment, the suction temperature increases, resulting in a higher temperature of the refrigerant gas inhaled by the compressor, which will increase the workload of the compressor and reduce its efficiency. When the suction temperature exceeds the design range, it may cause the compressor to overheat, which in turn triggers a protective shutdown and affects the normal operation of the system.

Temperature changes affect the physical properties of the refrigerant. The density and viscosity of the refrigerant are different at different temperatures, which will cause changes in the flow rate of the compressor during the suction and exhaust processes. In a low temperature environment, the viscosity of the refrigerant increases and the fluidity deteriorates, which may cause the compressor to start with difficulty or performance degradation.

Temperature also affects the performance of the lubricant. Compressors usually require lubricants to reduce friction and wear. High temperature will cause the viscosity of the lubricating oil to decrease, lose its effective lubrication effect, and may cause increased wear of the internal parts of the compressor, thereby shortening its service life. Under low temperature conditions, the lubricating oil may become too viscous, which will also affect its fluidity and lead to insufficient lubrication.

Temperature also has an important impact on the overall performance of the refrigeration system. The working efficiency and cooling capacity of the semi-hermetic refrigeration compressor will fluctuate with the change of ambient temperature. The cooling capacity of the system may be insufficient at high temperatures, affecting the refrigeration effect. In addition, long-term operation at extreme temperatures may cause aging and failure of system components, thereby increasing maintenance costs.

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