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1.Piston Compressors

• Reciprocating Piston Type:

Uses multiple pistons in cylinders (typically 5-10 cylinders)

Common in older vehicles and some heavy-duty applications

Known for durability but less efficient than newer designs

• Swash Plate/Wobble Plate Type:

Single set of pistons mounted on angled plate

Compact design used by many OEM manufacturers

Provides smooth operation with fewer moving parts

2.Rotary Vane Compressors

• Uses rotating vanes in an elliptical chamber
• Extremely quiet operation
• Common in Japanese and European vehicles
• Requires precise manufacturing tolerances
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3.Scroll Compressors

• Spiral-shaped fixed and orbiting scrolls
• Fewest moving parts (only 2 main components)
• Highest efficiency (up to 15% more than piston types)
• Increasingly popular in hybrid/electric vehicles

4.Variable Displacement Compressors

• Automatically adjusts output to match cooling demand
• No clutch cycling (runs continuously)

Two subtypes:

• Wobble Plate Variable - Common in GM/Delphi systems
• Swash Plate Variable - Used by Denso, Sanden

5.Electric Compressors

• Used in hybrid and electric vehicles
• Powered by high-voltage battery (200-400V)
• Compact, oil-free designs
• Precise speed control for energy efficiency

Key Selection Factors:

• Vehicle Compatibility: Must match OEM specifications
• Displacement Volume: Typically 100-180cc for passenger cars
• Mounting Configuration: Different bracket designs
• Refrigerant Type: R134a vs R1234yf compatibility
• Electrical Requirements: Clutch voltage/power needs