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Refrigeration Receiver

A receiver is commonly used on a refrigeration system that uses a TXV valve as its metering device.

Its main purpose is to temporarily store excess refrigerant in its liquid state that is not required when load conditions are low. The TXV also needs a supply of refrigerant in its liquid form at all times.  The receiver provides a constant supply of liquid to the TXV

Freon sometimes can back up into the condensor in some systems if no receiver is installed, this compenent prevents this.

The refrigerant charge in a system with a receiver is actually excessive than what is required.  This is to insure that at all times and operating conditions, there is enough freon to present constant liquid to the TXV.