Causes of ice blockage in the tubes of Freon evaporators; does Freon R22 react with calcium chloride?
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Recently, in vinyl chloride refrigeration systems using -35°C Freon siphon evaporators (with Freon flowing through the tube side and calcium chloride brine flowing through the shell side), ice blockages have occurred frequently; snowflake-like ice formations are present inside the tubes and end caps (which, upon melting, yield a mixture of Freon, water, and oil), preventing the evaporator from performing heat exchange. May I ask, where does the water in the system come from? (We use evaporative cooling for freezing, and fluorine-based coolant for oil.) Does Freon R22 react with calcium chloride?
I wonder if this kind of phenomenon has occurred in other affiliated units; do their -35°C systems also use R22 and calcium chloride?
There is excessive moisture inside the machine cavity; it is recommended to perform a vacuum leak test! Refill with Freon! Theoretically, only Freon and oil are present in the piping system and the compressor