In a TXV-equipped air conditioning system, where is the TXV located?

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Multiple Choice

In a TXV-equipped air conditioning system, where is the TXV located?

The main idea here is that the TXV is the metering device that controls how much liquid refrigerant enters the evaporator. It belongs in the liquid line feeding the evaporator, after the receiver-dryer so the liquid is clean and dry, and before the evaporator so it can regulate flow into the evaporator properly. Being after the receiver-dryer ensures moisture and contaminants are removed before the metering device, protecting the valve and helping it meter accurately. Being before the evaporator lets the TXV control the amount of liquid that actually enters the evaporator, which in turn maintains the proper superheat and prevents flooding or starvation of the evaporator. Placing it elsewhere would undermine its function: on the high-pressure side before the dryer or after the evaporator would miss the correct point of metering, and mounting it between the compressor and condenser would place it in the wrong part of the circuit for regulating evaporator flow.

The main idea here is that the TXV is the metering device that controls how much liquid refrigerant enters the evaporator. It belongs in the liquid line feeding the evaporator, after the receiver-dryer so the liquid is clean and dry, and before the evaporator so it can regulate flow into the evaporator properly.

Being after the receiver-dryer ensures moisture and contaminants are removed before the metering device, protecting the valve and helping it meter accurately. Being before the evaporator lets the TXV control the amount of liquid that actually enters the evaporator, which in turn maintains the proper superheat and prevents flooding or starvation of the evaporator.

Placing it elsewhere would undermine its function: on the high-pressure side before the dryer or after the evaporator would miss the correct point of metering, and mounting it between the compressor and condenser would place it in the wrong part of the circuit for regulating evaporator flow.

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