What is the difference between an accumulator and a receiver drier

Refrigerant from the condenser enters the receiver drier through the inlet port. The vapor rises to the top, while the heavier liquid refrigerant drops to the bottom. It passes through the filter and desiccant before it's stored at the bottom of the tank. As the expansion valve opens and closes, liquid refrigerant is drawn into the outlet port tube of the receiver drier, through the high-pressure line, and onto the expansion valve.

If this occurs, the desiccant is no longer effective, and will not provide future protection. This could diminish refrigerant and oil flow.

It serves similar, but slightly different functions. Accumulators are only used on systems that contain orifice tubes. It is a characteristic of orifice tube systems to have large amounts of liquid refrigerant leaving the evaporator.

In other words, unlike in expansion valve systems, where all or most of the refrigerant turned into a vapor while passing through the evaporator, in orifice tube systems, the refrigerant leaves the evaporator still as a liquid.

Sometimes, the desiccant material will disintegrate into small sand-like particles. This can cause possible clogging in other system components.

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