Spare Parts For Car Air-Conditioners
Compressor Assembly
The air-conditioning compressor does exactly what its name says it compresses refrigerant and sends it to your car's air condenser. The entire process is powered by your engine's drive belt (or belts). The highly pressurized liquid refrigerant converts to a gas and is circulated into tubes where the heat from the gas is quickly released, causing it to cool. The cooled gas then reverts back into liquid form as it returns to the compressor. The cooled gas is used to chill the car's cabin air.
Condensor Assembly
An AC Condenser helps in dissipating the heat. The AC condenser is placed directly behind the grille. An AC condenser looks like a radiator. This AC condenser has tubing or coils and cooling fins inside it. The only difference between a radiator and an AC condenser is that the radiator works for the cooling system of the engine, whereas an AC condenser functions for the interior air conditioning.  The coil of an air conditioning condenser is kept neat and clean, it will definitely function properly and that too for long time. This will also increase the life of the compressor as the compressor will also run cooler.
Evaporator Coil Assembly
The evaporator serves as the heat absorption component. The evaporator provides several functions. Its primary duty is to remove heat from the inside of your vehicle. A secondary benefit is dehumidification. As warmer air travels through the aluminum fins of the cooler evaporator coil, the moisture contained in the air condenses on its surface. Dust and pollen passing through stick to its wet surfaces and drain off to the outside. 
They are used to transport the gas from one component to other.
Receiver Drier Bottle / Filter
DRIER expands dramatically when it is heated up as it passes through the evaporator in the passenger compartment, absorbing the heat and changed into gas. The accumulator receives the in the gas state as it leaves the passenger compartment evaporator. It has desiccant to trap moisture. It filters the gas and silica gel inside absorbs the moisture from the system.
Relays are normally used in the A/C electrical circuit to protect switches that have a low current carrying capacity (i.e. a small contact area/weak pressure contact point) or for current draw differences between components.
The pressure switch senses internal pressures and can cycle the compressor off and back on based on minimum and maximum pressure limits.

Safety switches are installed at various points in the A/C system to prevent against too low or too high of a pressure or too high of a temperature. When activated, they turn off the compressor to prevent damage to the system as well as to help control its continuous operation.

Refrigerant Pressure Switches used to interrupt the electrical circuit to the compressor clutch.
Expansion Valve
A variable metering device that varies refrigerant flow based on cooling demand. As demand increases, the valve opens wider to permit more refrigerant into the evaporator. Once the demand has been satisfied, the valve opening is reduced to decrease flow. Cooling demand is monitored by a sensing bulb mounted on or near the evaporator.
Liquid Pipes
LIQUID pipes moves high-pressure liquid through system
Various Adaptors
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