WATER FILTER CUM PRUIFIER ASSEMBLY PROVIDED WITH MULTIPLE U.V. EXPOSURE FACILITY
This invention relates to water filter cum purifier assembly provided with multiple U.V. exposure facility.
Water filter cum purifiers currently available commercially do not ensure complete purification of water. Main reasons for insufficient purification are inadequate exposure to U.V. radiation and contamination of water due to contact with the metallic surfaces of the housing through which it flows.
In order to overcome these problems, a foolproof U.V. treatment system has been developed by us. Contact with the metal components are also avoided by providing a specific channel made of quartzes glass through which water is allowed to flow.
The water filter cum purifier assembly has a sedimentation filter module, a carbon adsorption filter module and a U.V. disinfections module, all sequentially connected with appropriate tubing water inlet and water outlet. The assembly also has the following supporting elements which ensure proper functioning of the product.
A printed circuit board for supply of power to the purifier assembly and for monitoring and controlling its functions.
A solenoid valve is provided to switch off and switch on the water supply to the assembly. This valve also regulates the flow of water through the assembly.

A photo conductive cell is provided which monitors the U.V. lamps intensity when the intensity level varies from the present valves, a signal generated by the photo conductive cell alerts the printed circuit board to switch off the water supply to the assembly thereby ensuring that the right dose of U.V. exposure to the water to be purified.
A sedimentation filter module housed inside a conventional bowl and suspended particles like dust, rust and other physical impurities are removed from the incoming water before it flows to the next stage.
Sediment filtration cartridge may be made of cellulose compressed filter medium, polypropylene yam wound cartridge, polypropylene melt blown cartridge and the like. Ceramic filter having 2 micron alumina fibres incorporated therewith and pleated to provide larger surface area for filtration is also used for enhancing filtration efficacy.
The outlet of sedimentation filtration module is connected to a carbon filtration module, which is made of carbon black made from powdered carbon which has a higher surface area than the conventional granular carbon filtration medium. Carbon powder is compressed and moulded with food grade bonding agents to provide the carbon block filter.
Pathogenic and infectious microorganisms that contaminate water is removed conventionally by passing the same through a chamber housing a U.V. lamp. This chamber is connected to the outlet of the carbon filtration module.
Conventional U.V. irradiation step is found unsatisfactory due to insufficient U.V. light exposure water passing through the metal housing of the U.V. lamps housing is prone to further contaminating the water.

In order to afford maximum exposure of incoming water to U.V. radiation, a special system has been developed. U.V. lamp preferably emits 253.7 nM U.V. wave length. These lamps are commercially known as U.C.V. grade lamps.
Channeling of water through the U.V. radiation module carried air through quartz glass tubings housed there in the outlet of the quartz glass is connected directly to the faucet by drawing out water. This is to avoid contact with the metallic surface of the U.V. housing. U.V. radiation lamp is located in the middle of the housing and the quartz channels are made in such a way that water entering the U.V. disinfection chamber is exposed to U.V. radiation at least twice. The inlet of water is at the bottom of the chamber and the outlet at the top water flows vertically as it enters and then horizontally. At the top end of the vertical channel, water is again allowed to flow horizontally and then vertically downward, horizontally at the bottom and vertically again around the U.V. lamp. The bends of the quartz channels are at right angles to each other thereby ensuring maximum turbulence to the water flowing there through. This further ensures maximum exposure to U.V. radiation. The diameter of the channels may also be different to enhance turbulence. The U.V. lamp, and the quartz channels around it are housed in highly reflective aluminum housing which also enhances exposure of water to U.V. radiation.
Water filter cum purifier are amply provided with multiple U.V. exposure facility according to this invention comprises a faucet means for drawing purified water, a sedimentation filtration module, a carbon filtration module and a U.V. radiation disinfecting module sequentially connected wherein said disinfecting module has a U.V. lamps and quartz glass channeling for water flow, the inlet of said quartz glass channel being connected to the outlet of carbon filtration module and is vertically and upwardly disposed at the entry, said channeling thereafter

being horizontally vertically and then horizontally disposed with respect to the base of the housing, all the bends of said channeling being at right angles to each other such that water flowing therethrough is subjected to their balance and is exposed at least twice to U.V. radiation, the outlet of said quartz channel being connected.
This invention will now be described with particular reference to the figures in the accompanying drawings.
Fig. I represents a schematic diagram of the water filter cum purifier according to this invention. Reference numerals 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 represent the water inlet port, sedimentation filter, carbon filter, first water passage channel, second water passage channel, U.V. lamp, U.V. housing, purified water outlet and L connector respectively. Arrows indicate the direction of water flow.
Fig. II is a sectional view of the water filter cum purifier assembly wherein reference letter SF and CF represent sedimentation and carbon filter modules. UV stands for ultra violet lamp, while WPl, WP2 stand for water passage 1 and 2. WIP and WOP represent water inlet and water outlet while BFP and FV represent back flush port and solenoid valve. Reference letters PCC stands for photo conductive cell for monitoring U.V. radiation.
Arrows indicate the direction of flow of water through the assembly.
Various alterations and modifications known to persons skilled in the art fall within the scope and ambit of this invention and the appended claims.

WE CLAIM:
1. A water filter cum purifier assembly with multiple U.V. exposure facility comprising a sedimentation filtration module, a carbon filtration module and a U.V. radiation disinfecting module sequentially connected wherein said disinfecting module has a U.V. lamps and quartz glass channeling for water flow, the inlet of said quartz glass channel being connected to the outlet of carbon filtration module and is vertically and upwardly disposed at the entry, said channeling thereafter being horizontally vertically and then horizontally disposed with respect to the base of the housing, all the bends of said channeling being at right angles to each other such that water flowing therethrough is subjected to their balance and is exposed at least twice to U.V. radiation, the outlet of said quartz channel being connected.
2. The water filter cum purifier assembly as claimed in claim 1 wherein said sedimentation filter module is a polypropylene yam wound filter, polypropylene melt blown filter, compacted cellulose medium fitter or plated ceramic filter.
3. The water filter cum purifier assembly as claimed in claims 1 and 2 wherein said a U.V. lamp is a UVC grade lamp 253.7 nM wavelength.
4. The water filter cum purifier assembly as claimed in claims 1 - 3 wherein a printed circuit board, a photo conductive cell and a solenoid valve are provided for monitoring and controlling the operation of said assembly.

5. The water filter cum purifier as claimed in claims 1 - 4 wherein said
U.V. lamp and quartz glass channels are enclosed and aluminum housing having
high reflective surface.
6. A water filter cum purifier assembly substantially as herein described
with reference to Figs. I and II of the accompanying drawings.