What is the primary function of a low-pressure switch in a refrigeration system?

The primary function of a low-pressure switch in a refrigeration system is to protect the compressor from operating under low refrigerant conditions. When the refrigerant pressure drops below a certain threshold, it indicates that there may be a refrigerant leak or other issues affecting the system's pressure. The low-pressure switch will open, shutting off the compressor to prevent it from running without adequate refrigerant. This is crucial for preventing potential damage to the compressor, which can occur when it runs without sufficient refrigerant to absorb heat. Protecting the compressor in this way helps maintain the system's reliability and extends its lifespan.

Monitoring temperature levels, regulating airflow, or measuring refrigerant efficiency are functions related to other components in a refrigeration system. Temperature sensors and airflow controls have their designated roles, while efficiency measurements would be handled separately without directly involving the low-pressure switch's protective function.