What role does an expansion valve play in a refrigeration system?

The expansion valve plays a critical role in a refrigeration system by lowering the pressure of the refrigerant as it passes through. This reduction in pressure results in a drop in temperature, which is essential for the refrigeration cycle. As the refrigerant enters the expansion valve at high pressure, it is allowed to expand rapidly. This expansion causes the refrigerant to cool significantly, preparing it to absorb heat from the environment in the evaporator section of the system.

Additionally, the expansion valve regulates the flow of refrigerant into the evaporator to ensure that the system operates efficiently. By controlling the amount of refrigerant that enters the evaporator, the expansion valve maintains optimal operating conditions, facilitating effective heat absorption and contributing to the overall efficiency and effectiveness of the refrigeration system.