Does anyone know the principle of hotel central air conditioning system?

The refrigeration technology for air conditioning belongs to the scope of ordinary refrigeration, which mainly uses liquid vaporization refrigeration. (Mainly using the liquid vaporization process to absorb specific latent heat, and different liquid pressures have different boiling points. The lower the pressure, the lower the boiling point.) According to the different ways of transferring heat from high-temperature objects to low-temperature objects, it can be divided into: vapor compression refrigeration, absorption refrigeration.