Understanding Window Air Conditioner Compressor Disconnection

Window air conditioners contain several components that work together to cool a room. The compressor is a key part of the refrigeration cycle, pumping refrigerant. Controlling when the compressor turns on and off is essential for maintaining the desired room temperature and protecting the unit.

The question asks which component disconnects the compressor from the power source when the temperature is "enriched" in the room. In the context of air conditioning, "temperature is enriched" likely refers to the desired comfortable temperature being reached.

Analyzing the Options and the OLP

Let's look at the provided options and the component identified as the correct answer: the OLP.

• Thermostat: A thermostat is designed to sense the room temperature and compare it to the user's setting. It typically signals the system (like the compressor) to turn off when the desired temperature is reached.
• OLP (Overload Protector): An OLP is primarily a safety device that protects the compressor motor from damage due to excessive current (overload) or overheating. It trips and disconnects the power if these conditions occur.
• Relay: A relay is an electrically operated switch. It is often used to turn components like the compressor on and off based on signals from control circuits, such as the thermostat.
• Selector switch: This switch allows the user to select operating modes (like cool, fan only, heat) and fan speed. It doesn't directly disconnect the compressor based on room temperature.

Based on the provided correct answer, the component that disconnects the compressor when the room temperature is reached is the OLP (Overload Protector). While typically the thermostat is responsible for cycling the compressor based on room temperature, and the OLP is a safety cut-out for electrical or thermal overload of the compressor itself, the question and answer indicate that, in this specific context, the OLP performs this function. Therefore, when the desired room temperature is reached, the OLP is the component that causes the compressor to disconnect from the power source according to the premise of the question.

Revision Table: Key Components in Window AC

Additional Information on AC Compressor Control and Safety

In a standard window air conditioner system, the thermostat plays the primary role in cycling the compressor based on room temperature. When the room reaches the temperature set on the thermostat, the thermostat signals the control circuit (often involving a relay) to turn the compressor off. When the room temperature rises again, the thermostat signals the compressor to turn back on.

The OLP is a critical safety component. It monitors the current drawn by the compressor motor or its winding temperature. If the current exceeds a safe limit (due to issues like low voltage, damaged windings, or stuck motor) or the motor overheats, the OLP will trip, breaking the circuit and stopping the compressor. This prevents permanent damage to the motor.

While the OLP's main function is safety from electrical/thermal overload, the question indicates it acts based on room temperature being reached. This suggests a specific context or design not typical of all window ACs, or perhaps an interpretation where reaching the set temperature somehow leads to conditions that trigger the OLP, though this is not its standard operational trigger.