In factories, circulating water used to cool the temperature of equipment can also be called refrigerant, and ammonia water can also be called refrigerant.
In life, refrigerants usually refer to Freon series volatile liquids used in refrigerators and air conditioners. Liquid absorbs tropical heat by volatilization, releases heat into liquid after being compressed by compressor, and so on. Refrigerator series commonly used in daily life.
There are also lithium bromide series, which have the same principle as Freon, but are rarely used in life.
Freon series and lithium bromide series are basically non-toxic and generally cannot be contacted. Most of them can be contacted. Long-term inhalation will cause serious harm to human body. Freon itself is non-toxic, but when it is mixed with air to a certain concentration, there have been accidents that can lead to suffocation or serious injury. Therefore, if you contact frequently, you should take protective measures.