Gas filter: includes mesh filter and dehumidifier. A dehumidifier is a material that absorbs moisture mixed in refrigerants. Inside the gas filter, the dehumidifier is placed between two layers of mesh or stored in a separate bag. The dehumidifier bag is fixed or placed freely in the filter. The hygroscopicity of this substance depends on the volume and type of desiccant as well as on temperature.
Above the gas filter there is usually a glass window to monitor the flow of the medium, this door is also called the gas eye. Inside the filter, the refrigerant receiving tube is installed at the bottom of the filter to receive 100% of the liquid medium supplied to the expansion valve.
Principle of operation
The refrigerant is liquid, flowing from the condenser into the filter hole, through the filter mesh and dehumidifier. The refrigerant after passing through the filter is a refrigerant that has been removed from moisture and dirt. Wet substances exist in the system either because they enter during assembly repair or due to unsatisfactory vacuum. If the refrigerant is not filtered out of dirt and moisture, the valves in the system as well as the cold cyclone will quickly fail.
After being purified and dehumidified, the liquid medium follows the tube to the expansion valve (throttle valve)
R-12 refrigerant and R-134a refrigerant use different desiccants. The refrigerant receiving tube is located above the accumulator. A fine filter prevents impurities from circulating in the system. The inside of the filter has a small hole that allows some lubricant to return to the compressor.
