Final answer:
The single body, combo condenser-receiver pressure regulator is a head pressure control, and the air conditioner component that converts gas to liquid is the condenser.
Step-by-step explanation:
A single body, combo condenser-receiver pressure regulator that regulates both condenser and liquid receiver pressure is a head pressure control. The component of an air conditioner that converts gas into liquid is the condenser. The evaporator converts liquid refrigerant into gas. In a heat pump system, the electrically driven compressor raises the temperature and pressure of the gas and forces it into the condenser coils, where the gas releases heat and condenses into a liquid. This liquid then flows through an expansion valve to the outdoor evaporator coils, where it is cooled through expansion, completing the cycle.