Us 7879231 B2 In Tank Water Chiller


This invention is an improvement to the existing reverse osmosis water filtration systems used in under-the-sink and similar commercial applications. This improvement uses a thermally conductive liner and thermoelectric device to cool the water.

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Posted by Daniel Cavataio under Household

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Us 7879231 B2 In Tank Water Chiller
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Full Description

Water is a staple of life. We use it to quench our thirst, cook our food, and cleanse our bodies. Its applications are limitless. Contaminated water, however, may harbor pollutants that have adverse, and sometimes downright dangerous, affects. High levels of natural fluorides, for example, can lead to permanently discolored teeth; and high sulfide levels can make water practically undrinkable. Contaminated water may be the result of natural causes, weather-related disasters, such as floods or hurricanes, or even municipal water sources. Therefore, the availability of quality water in homes and businesses is a matter of national concern, as is the need for energy-efficient, cost-effective, under-the-sink water purification systems.

Under-the-sink water purification systems are a well-known art and typically incorporate a chilling means, resulting in cool, purified, and refreshing drinking water. Past designs have used mechanical refrigeration as a chilling means. Mechanical refrigeration, however, often uses complex, large machines that are noisy and expensive to operate due to their high energy consumption. Hence, mechanical refrigeration cannot be effectively used as a chilling means for under-the-sink water purification systems.

For compact, quiet, under-the-sink water purification systems, Peltier-like devices, otherwise known as thermoelectric modules, can be used as a chilling means. Thermoelectric modules generally have two sides, one hot and one cold. They are powered by voltage in direct current (or dc voltage). The thermal characteristics can be reversed by electrically reversing the voltage applied to the device. In this application the cold side is in thermal communication with the water reservoir, and the hot side is thermal communication with the free air, a heat-sink, or potentially the hot water supply or waste lines.


Advantages over other Chiller systems:


  • All in one unit
  • Larger water reservoir
  • Less space "Cooling is built into Pressure Vessel"
  • Cost




  • Residential
  • Light Commercial
  • Marine
Since this posting, I have had a many responses though IdeaBuyer, In order for me to expedite your requests in a timely matter please contact me directly, either at dcavataio@toast.net or call 414-248-4989  "Please specify that your requesting information for patent number "US7879231B2 In Tank Water Chiller" in your message", Thank You.. Dan