The liquid refrigerant that is banned is CFC. It destroys the ozone.
when the refrigerant passes through the metering device, some of it starts to flash from a liquid to a gas because
Compressor ice cream makers use a refrigerant liquid like in a refrigerator or air conditioner. Older units did use freon as the refrigerant, but that is now banned.
Liquid refrigerant charging of a system is normally accomplished in the liquid line. For example, when a system is out of refrigerant, liquid refrigerant can be charged into the king valve on the liquid line or receiver.
when the refrigerant passes through the metering device, some of it starts to flash from a liquid to a gas because
Liquid
This is because as the liquid passes through the refrigerator, it absorbs the heat from the food in the fridge. Therefore as heat is transferred from the food to the refrigerant, the following happen: - The temperature of the food falls - the temperature of the refrigerant rises. Thus, a higher temperature would change the refrigerant from liquid to gas.
When changing liquid refrigerant into a system
Vaporizing the refrigerant
because of flash gas the amount of liquid entering the evaporator would be 75 % liquid and 25% vapour
To endure that the ONLY gas in the system is refrigerant.
So the refrigerant won't go into sensible heat and reject the process because no vapor is left to condense. This causes the liquid to drop below the wondering saturation temperature of 125°.
It cools the liquid refrigerant after it is compressed from gas to a liquid from the compressor.