Coolant machine VS water machine, the difference is a bit big:
1。 primary structure
Usually, there is only one circulating system in the refrigeration unit. It's a Freon refrigeration cycle.
Refrigerator has three cycles, Freon cycle, cooling water cycle and chilled water cycle.
2。 Available range
Refrigeration unit: the applicable building area is relatively narrow, and the refrigeration capacity is limited. But it is suitable for general household central air conditioning. Because refrigerants and copper pipes are expensive. In case of leakage, there is a danger of explosion. Representative systems: household air conditioner, VRV air conditioner.
Chiller: Because water is used to carry cold, it has a large building area, which can be one building or several buildings. Multi-machines can run in parallel, with stable temperature change and generally good comfort. The average 5-star hotel will definitely choose a brand-name water dispenser with high energy efficiency.
3。 expense
Because of its characteristics, the refrigeration unit is cheap. But it doesn't save energy.
Chillers are very fraudulent, but they are very energy-saving. The COP of centrifuge can reach 5 or even more than 7. Of course, there are also screw units with less fraud.
Personally, I usually look at the basic knowledge and comparison of air conditioning on industry websites and forums, hoping to help you.