What is the purpose of the desiccant bag in the receiver/dryer or accumulator?

The purpose of the desiccant bag in the receiver/dryer or accumulator is to absorb moisture inside the system. In air conditioning and refrigeration systems, moisture can be detrimental to the operation and efficiency of the system. When water or moisture mixes with refrigerant, it can lead to corrosion of metal components, degrade the lubricating oil, and promote the formation of harmful acids that can damage the compressor and other components.

The desiccant material inside the bag is specifically designed to attract and hold moisture, thereby maintaining the integrity of the refrigerant system. By removing moisture, the desiccant helps to ensure that the refrigerant remains uncontaminated, which in turn supports optimal cooling performance and enhances the lifespan of the system. Proper moisture control is crucial, as it prevents freeze-ups and ensures that the system operates efficiently and effectively.