Auto Heating and Air Conditioning

1
Compressors, Clutches, and Drives
Chapter 8
2
l. Objectives

• Explain the purpose of a refrigeration
  compressor.
• Identify the major parts of radial and axial
  piston compressors.
• Explain the operation of radial and axial piston
  compressors.

3
ll. Objectives

• Identify the major parts and explain the
  operation of rotary vane compressors.
• Identify the major parts and explain the
  operation of scroll compressors.
• Explain the operation of a capacity control valve.

4
lll. Objectives

• Explain how the engine drives the compressor.
• Explain the purpose of a compressor clutch.
• Identify the major parts of a compressor clutch.
• Explain the operation of a compressor clutch.

5
Compressor Purpose

• To raise the pressure and temperature of the
  refrigerant

6
Basic Compressor Parts
7
Compressor Parts

• Body
• Ears
• Endplate

• Crankshaft
• Crankcase
• Lip seal

8
Compressor Body

• The mounting place for other compressor parts
• Holds refrigerant and lubricating oil
• Made of aluminum on newer vehicles

9
Compressor Ears

• Built-in mounting points for attaching compressor
  to engine

Ears
10
Endplate

• Attached to the compressor body
• Low and high side hose connections installed on
  the body or endplate

11
Crankshaft and Crankcase

• Crankshaft rides on bearings in the compressor
  body
• Crankcase holds the crankshaft

12
Crankshaft and Crankcase Illustration
13
Compressor Parts

• Crankshaft drive end extends from the body
• Pulley and clutch assembly installed on the
  crankshaft drive end

14
Lip Seal

• Always installed where crankshaft drive end
  extends from compressor body