Belt Drive Compressors

The air conditioner compressor is the heart of the refrigeration system and functions as a suction, compression, and circulation pump. The compressor can be regarded as the interface between the low-pressure end and the high-pressure end of the refrigerant circuit, and the refrigerant is sucked and compressed from the low-pressure side to raise the temperature and pressure, and then pumped into the high-pressure side to reciprocate.

SMP manufactures Belt Drive Compressors:

Variable Displacement Swashplate
Fixed Displacement Swashplate
Scroll, Fixed or Variable control

Variable Displacement Swashplate

The required amount of refrigerant gas is sucked in and compressed by changing the pressure balance within the compressor. The swashplate angle can be adjusted, which forces the piston to make larger or smaller strokes.

Fixed Displacement Axial Swashplate

The pistons move back and forth when power from the engine causes the shaft and swashplate to rotate. The ends of the piston intake pressurize and discharge refrigerant.

Scroll, Fixed or Variable Control

The compressor is constructed from one fixed and one rotating scroll in an offset spiral configuration. Shaft rotation creates spaces of varying volume btw the 2 scrolls, causing refrigerant to be sucked in and compressed.

Belt Drive Compressors

COMPRESSOR TYPE	DISPLACEMENT	OPTIONS	APP
	130, 140, and 170 cc	Mechanical control (internal), electric control (external), clutch type, clutchless	PC
	140, 150, 160. 170. 180, 210, and 320 cc	Speed sensor	PC & CV
	77, 86, 96, and 106 cc	Thermal cutout, variable capacity control valve	CV
Rotary Vane	83, 96, and 120 cc	Thermal cutout	PC
Twin Cylinder Crankshaft (York)	210 cc	With and without clutch	PC & CV
Fixed Displacement Wobble Plate, 5 & 7 Cylinder	108, 138, and 150 cc	With and without clutch, thermal cutout	CV