Valeooscope - Air Conditioning System Thermal comfort loop

11. The components of the A/C Loop

11.1.1 Piston compressors Piston compressors work by transforming the rotational movement of the shaft into linear movement of the pistons. There are three subfamilies of piston compressors: g Crank shaft g Swash plate type g Wobble plate type The crank shaft family is more specific to bus applications. The swash plate and wobble plate families are common in light vehicles. There are two variants, the fixed-cylinder com- pressors and the variable-cylinder compressors Fixed-cylinder compressors The oscillating plate remains at the same angle, irrespective of the conditions of use. This variant cannot adjust the cooling power of the system precisely and only the complete compres- sor shutdown cycles are possible.

Suction port

The refrigerant suction occurs in the compressor suction port. It is part of the A/C loop Low Pressure circuit (LP)

LP

HP

Pulley

Oscillating plate

Pistons

The refrigerant discharge occurs in the compressor discharge port. It is part of the A/C loop High Pressure circuit (HP)

Discharge port

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