What is the basic function of water dispenser?

Water dispenser is a device that can raise or lower the temperature of barreled pure water (or mineral water) and make it convenient for people to drink. Put barreled water on the top of the machine and use it together with barreled water.
Water dispensers can be divided into three types: warm water, ice heat and ice warm water. Ice heat dispensers can be divided into two types: semiconductor refrigeration water dispenser and compressor refrigeration water dispenser.
Put barreled water on the top of the machine and use it together with barreled water. Bottled water dispenser appeared before the middle of the 20th century. This kind of water dispenser is designed as a special connector on the top of the machine body to place the bucket upside down. The latest foreign water dispenser puts the bottled water on the lower part of the machine, which is inhaled by the suction pump. This way is more safe and sanitary than the conventional water dispenser. Because of the different water dispensers, there are many specifications of the bucket.
In the United States and China, most of them use 5-gallon barrels, while the standard specification in other countries or regions is 18.9 liters.

Bottled water refers to the pure water or mineral water produced by tap water or groundwater extraction and processed by modern industrial technology (reverse osmosis, electrodialysis, distillation, resin softening, etc.), which is filled into PC barrels by the filling production line.
The barreled water is pure water, mineral water and mineral water (made by adding minerals into purified water manually), etc.
There are many kinds of bottled water on the market, including purified water, mountain spring water, mineral water, mineralized water, activated water, ionic water, etc. Because of the different water sources and production processes, the kinds and contents of trace elements in different kinds of barreled water are also very different. Some bottled water sources are natural groundwater, such as mineral water and mountain spring water; some are urban tap water, which is processed into bottled water, such as purified water, distilled water and ionic water.