Which component condenses any vapour remaining in refrigerant?

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Condensation of refrigerant vapor happens where heat is rejected from the high‑pressure gas, turning it into liquid. In a typical refrigerant cycle, this occurs in the condenser, which sits on the high‑pressure side after the compressor. The condenser removes heat to the surroundings, and the refrigerant changes from vapor to liquid in that process.

The receiver-dryer does not condense vapor; it serves to store liquid refrigerant and remove moisture and any impurities from the liquid line after the condenser. The accumulator on the suction side protects the compressor by separating any liquid that might be returning with the vapor, preventing liquid slugging, but it does not condense vapor either. The compressor itself compresses vapor to a higher pressure and temperature, not condensing it. Therefore, condensation of remaining vapor is the function of the condenser.