The filling of r410a refrigerant should be carried out after vacuuming. There are four filling methods: weighing filling method, gauge pressure filling method, empirical filling method and quantitative filling method.
Refrigerant, also known as refrigerant, refrigerant, and refrigerant, is the medium substance used to complete energy conversion in various heat engines. These substances often undergo reversible phase changes to increase power. Such as steam in steam engines, refrigerant in refrigerators, etc. When a general steam engine is working, it releases the heat energy of steam and converts it into mechanical energy to generate motive force; while the refrigerant in the refrigerator is used to transfer heat from low temperature to high temperature. The more common working media in traditional industry and life are partially halogenated hydrocarbons, but they are gradually being eliminated because they can cause holes in the ozone layer. Other widely used working media include ammonia, sulfur dioxide and non-halogenated hydrocarbons.
In 1805, Evans originally proposed the idea of ??using volatile fluids in a closed cycle to freeze water into ice. He described a system in which ether was evaporated under vacuum and the vapor was pumped to a water-cooled heat exchanger where it was condensed and used again. In 1834, Perkins developed and patented the vapor compression refrigeration cycle for the first time. Diethyl ether was used as the refrigerant in the vapor compression refrigeration equipment he designed.