R-134a Condenser, Orifice Tube, Evaporator & Accumulator

Completing the factory 1994 R-134a refrigeration loop are the front parallel-flow aluminum condenser, the fixed-diameter expansion orifice tube, the firewall plate-fin evaporator core, the suction-side accumulator-drier canister, and the low-pressure clutch cycling switch.

Phase-Change Refrigeration Cycle: Hot high-pressure R-134a gas (~225 psi) from the FS10 compressor condenses into a high-pressure liquid as ram air flows through the front condenser. That liquid then squeezes through a tiny calibrated brass tube—the Fixed Orifice Tube—into the low-pressure evaporator core (~32 psi). Because pressure drops suddenly, the liquid R-134a flashes into a cold boiling mist at ~35°F, absorbing massive latent heat from the cabin blower air before entering the accumulator-drier.