Answer :
Final answer:
To ensure correct direction of refrigerant flow in heat-pump room air conditioners, check valves are included in the unit. These allow the refrigerant to flow in a single direction, preventing any possible backward flow. The refrigerant flow is important for heat transfer from the room to the outside.
Explanation:
To ensure the appropriate directional flow of refrigerant in heat-pump room air conditioners, check valves are included in the unit. These check valves, also known as non-return valves, allow the refrigerant to flow in one direction only, preventing any potential backwards flow. Refrigerant flow is crucial to the functioning of the air conditioner unit as it's responsible for the transfer of heat from inside to outside of the room (or vice-versa based on the unit's setting). By design, these check valves open in the direction of the refrigerant flow and close if it attempts to flow backward, ensuring proper system operation and efficiency over time.
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