What is Water Cooler ?

      A water cooler or water dispenser is a device that cools and dispenses water. They are generally broken up in two categories: bottleless and bottled water coolers. Bottleless water coolers are hooked up to a water supply, while bottled water coolers require delivery (or self-pick-up) of water in large bottles from vendors.
      Nowdays, there are about 6 kinds of water dispenser, these are as follows:

   1.Wall-mounted water dispenser

      The wall-mounted type is connected to the building's water supply for a

continuous supply of water and electricity to run a refrigeration unit to cool the incoming water, and to the building's waste disposal system to dispose of unused water.
      In the standard wall-mounted cooler, also commonly referred to as a water fountain or drinking fountain, a small tank in the machine holds chilled water so the user does not have to wait for chilled water. Water is delivered by turning or pressing a button on a spring-loaded valve located on the top of the unit, that turns off the water when released. Some devices also offer a large button on the front or side. Newer machines may not have a button at all; instead a sensor that detects when someone is near and activates the water. Water is delivered in a stream that arches up, allowing the user to drink directly from the top of the stream of water. These devices usually dispense water directly from the municipal water supply, without treatment or filtering.

   2.Bottom-load water dispenser

      The most common water dispensers are the ones that have the bottle on the top. The bottom-load water dispenser eliminates the need to lift the heavy water bottles. Instead the water bottle is placed at the bottom of the dispenser.

   3.Tabletop water dispenser

   
There are also smaller versions of the water dispensers where the dispenser can be placed directly on top of a table for serving a smaller number of people.

   

 

4.Direct-piping water dispenser

      Water dispensers can be directly connected to the in-house water source for continuous dispensing of hot and cold drinking water.

   5.Freestanding water dispenser

     

A freestanding design generally involves bottles of water placed spout-down into the dispensing machine.Just like the Genuine Joe

   6. Instant hot water dispenser

      A new development within the water cooler market is the advent of countertop appliances which are connected to the mains and provide an instant supply of not only chilled water but also boiling hot and hot water.For example, InSinkErator and Billi

 

 Cooling and heating methods

     Usually units offer a refrigeration function to chill the water. 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.

In the next post , I want to discuss how do the water dispenser heat up water so quickly.