Cooling and heating methods of water dispenser
Cooling
Most modern units offer a refrigeration function to chill the water, using Vapor compression refrigeration or Thermoelectric cooling.
Vapor compression refrigeration
Water coolers using vapor compression refrigeration are made up of the following components:
Reservoir
RR technology is a removable reservoir is an open-end tank with cooling coils that come into contact with the external tank surface. It operates on the basis of a modular system, allowing one to easily detach and refill water instead of keeping it in a closed system. One of the advantages in using a removable reservoir is the ease of sanitization. This allows end users to replace the reservoir completely rather than sending an entire water cooler back for servicing. A similar technology can be found in many modern water dispensers and coffee machines.
Stainless Steel – open end tank with cooling coils that come into contact with the external tank surface
Pressure cooling tank – A closed pressurized tank with external cooling coil that comes in contact with the tank surface
Ice-bank – A pressurized water coil pipe that sits in a volume of pre-chilled water
Heating
Some versions also have a second dispenser that delivers room-temperature water or even heated water that can be used for tea, hot chocolate or other uses. The water in the alternate hot tap is generally heated with a heating element and stored in a hot tank (much like the traditional hot water heaters used in residential homes). Additionally, the hot tap is usually equipped with a push-in safety valve to prevent burns from an accidental or inadvertent pressing of the lever.
