12 Volt Air Conditioner Compressor 01139026 For Renault Megane WXRN004

12 Volt Air Conditioner Compressor 01139026 For Renault Megane WXRN004
 
 

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Compressors :

1) Rotary Vane - Panasonic

Rotary vane compressors consist of a rotor with three or four vanes and a carefully shaped rotor housing. As the compressor shaft rotates, the vanes and housing form chambers.

The R134a is drawn through the suction port into these chambers, which become smaller as the rotor turns. The discharge port is located at the point where the gas is fully compressed.The vanes are sealed against the rotor housing by centrifugal force and lubricating oil. The oil sump and oil pump are located on the discharge side, so that the high pressure forces oil through the oil pump and then onto the base of the vanes keeping them sealed against the rotor housing.

During idle an occasional vane noise from the compressor may be heard. This is due to the time taken for lubricating oil to circulate through the A/C system.

2)Scroll type - Sanden

This compressor uses a unique design with two scrolls, one fixed and one is movable, both are inter-leaved.The movable spiral is able to ORBIT or oscillate without actually fully rotating. The movable scroll is connected to the input shaft via a concentric bearing.

As the movable spiral oscillates within the fixed spiral, a number of pockets are formed between the spiral. As these pockets decrease in size the refrigerant is squeezed, the pressure increases and is discharged through a reed valve at the discharge port in the rear section of the compressor.

3)Variable stroke - Harrison V5

The Delphi (Harrison) V5 compressor is a non-cycling variable displacement compressor.

The compressor varies displacement to control capacity to meet A/C system demand at all operating conditions. The compressor features a variable angle wobble plate in five (V5) cylinder axial piston design.

Displacement is controlled by a bellows actuated control valve located in the rear cylinder head. This control valve senses and responds to the system suction pressure or A/C system demand.

Through regulation of compressor crankcase pressure, the wobble plate angle, and therefore compressor displacement is variable.

In general, the compressor discharge pressure is much greater than the compressor crankcase. Which is greater than or equal to the compressor suction pressure.

At maximum displacement, compressor crankcase pressure is equal to the compressor suction pressure.

At reduced or minimum displacement, the compressor crankcase pressure is greater than the suction pressure.

4 steps to diagnose a car air conditioning compressor problem:

Step 1: Start the engine and turn on the A/C to the highest setting. This will activate the air conditioning compressor, which will draw refrigerant from the evaporator at low pressure, compress it, and send it to the condenser at high temperature and pressure.

Step 2: Listen for any unusual noises. Inspect the clamps, fixing points, hoses, and lines for breaks, cracks, missing nuts or bolts, and vibrations transmitted from the engine to the cabin. Check the belt, clamping device, tensioner pulleys, and clutch for wear, as they can cause unusual noises. If no obvious issues are found, consult a qualified technician to further diagnose the problem.

Step 3: Check for cool air coming from the air vents. Make sure the cooling fans operate when the air conditioner is on. Clean or replace the cabin air filter if necessary. Remove any debris, such as leaves, bugs, or dirt, that could obstruct airflow through the condenser.

Step 4: Inspect for visible leaks under the car. Look for any signs of refrigerant leakage, such as oily stains or puddles. If a leak is detected, it is recommended to seek professional assistance to properly diagnose and repair the issue.