Abstract: A water filtration device comprising a water pump for providing water, a first carbon filter that receives water from the water pump, a first ball valve having a first opening connected to the first carbon filter, a first ultrafiltration membrane that receives water from the first carbon filter after it passes through the first opening, a second ball valve having a second opening and connected downstream from the first ultrafiltration membrane, a second ultrafiltration membrane that receives water from the first carbon filter through the second opening, said second ultrafiltration membrane being positioned downstream said first carbon filter, wherein water can flow simultaneously through the first ultrafiltration membrane and the second ultrafiltration membrane from the first carbon filter, a second carbon filter connected downstream from the first and second ultrafiltration membranes that receives and filters water from the first and second ultrafiltration membranes, resulting in producing purified water.

Abstract: An apparatus is provided for automatic regulation of water temperature. The apparatus comprises a compressor for compressing a refrigerant, a condenser that receives refrigerant from the compressor and reduces the temperature of the refrigerant by exchanging the refrigerant's heat with air surrounding the condenser, an expanding valve that receives refrigerant from the condenser and transforms the refrigerant in a high pressure state to a low pressure state, and an evaporator that receives refrigerant from the expanding valve and facilitates heat exchange between the low temperature refrigerant and a high temperature water. The evaporator comprises of two adjacent chambers that share a common wall. The first chamber is configured to receive the refrigerant and the second chamber is configured to receive the water, and the refrigerant and water exchange heat through the common wall. The heat exchange results in the reduction of water temperature and an increase in the refrigerant's temperature.