In a system using an automatic expansion valve, where is constant pressure maintained?

In a refrigeration system utilizing an automatic expansion valve, constant pressure is maintained in the evaporator. The primary function of the automatic expansion valve is to regulate the flow of refrigerant into the evaporator while keeping the pressure within that section steady. This regulation ensures that the evaporator operates effectively by allowing the refrigerant to absorb heat from the surroundings consistently.

By maintaining a constant pressure, the automatic expansion valve ensures that the refrigerant can adequately change from a liquid to a vapor state as it absorbs heat, optimizing the cooling capacity of the system. This reliable control mechanism is essential for maintaining the efficiency and performance of the refrigeration cycle.