WO2007010549A1 - A household reverse osmosis based drinking water purifier - Google Patents

A household reverse osmosis based drinking water purifier Download PDF

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Publication number
WO2007010549A1
WO2007010549A1 PCT/IN2006/000055 IN2006000055W WO2007010549A1 WO 2007010549 A1 WO2007010549 A1 WO 2007010549A1 IN 2006000055 W IN2006000055 W IN 2006000055W WO 2007010549 A1 WO2007010549 A1 WO 2007010549A1
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WIPO (PCT)
Prior art keywords
water
reverse osmosis
purifier
treated
membrane
Prior art date
Application number
PCT/IN2006/000055
Other languages
French (fr)
Inventor
Mahesh Gupta
Original Assignee
Mahesh Gupta
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Publication of WO2007010549A1 publication Critical patent/WO2007010549A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C02F9/20—Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/043—Treatment of partial or bypass streams
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage

Definitions

  • the present invention relates to a water purifier and, in particular, to a household reverse osmosis based drinking water purifier adapted for controlled natural mineral content in generated purified water.
  • the reverse osmosis based water purifier adapted for delivery of purified water with controlled natural mineral content is simple and cost effective and serves to provide safe and healthy drinking water suitable for household purposes.
  • the water purifier of the invention is adapted compact and user-friendly configuration of reverse osmosis based purifier so as to facilitate its ready and wide application even in remote locations.
  • Drinking water contamination is a serious health concern '.and with the water resources being polluted gradually with various sources of contamination, provision of pure and safe drinking water has been a continuing concern in the related field.
  • US 5,928,503 disclose a desktop drinking water machine and include a reverse osmosis mechanism consisting of a reverse osmosis filter and a pair of active carbon filters.
  • the reverse osmosis mechanism is linked to a pump through an inlet pipe, a pure water pipe connected to a reservoir and an outlet pipe connected to the original reservoir where both pipes link the original reservoir to the pump.
  • a water level sensor in the reservoir is linked with the pump through a processor to control a water pumping operation. When the water level rises above the water level sensor, the pump is initiated and delivers water from the reservoir into the reverse osmosis mechanism. Pure water then flows into the storage tank and wastewater flows to the reservoir.
  • the pump When the volume of the water in the reservoir is approximately one-third of the volume of the original water maintained in the reservoir, the pump is deactivated. At this time, the purified water contained in the storage tank approximates two-thirds of the volume of the water in the reseWoir, which provides for an increased purifying rate.
  • US 6,383,384 is directed to An apparatus for purifying water that uses a synchronous combination of a worm gear and spring assembly that delivers constant mechanical energy for sustaining continuous filtration operations without the concomitant repetitious cranking that has been commonly prerequisite in the art.
  • An electric motor may be provided particularly to support mass production of fresh water from salt water. The electric motor is preferably applied intermittently to engender sufficient energy storage to sustain continuous filtration.
  • US 6,579,451 teaches * a water desalting installation which comprises at least an auxiliary pump and another high pressure pump in parallel with an internal circulation pump, and at least one pair of feed chamber which are pressurized alternatively, each of them forming a closed circuit, preferably toroidal, so that the water circulates always in the same direction and continuously, taking advantage of its kinetic energy in the valve actuation; it may have separation means to separate the water masses of different salinity, said separation means being comprised of pistons having a spherical shape and of which the apparent density is similar to that of the water, said pistons being retained briefly during the cycle change by baskets or equivalent devices, while the water circulates to the expense of its kinetic energy, the cycle changes being controlled by approximation and housing sensors, or by flow meters or by salinity measures when such separation means are not available.
  • reverse osmosis based water purifiers are well known and commonly in use. Importantly however such reverse osmosis based water purifiers are basically used for purifying water having high salt content. Moreover, also such reverse osmosis based purifiers are found to provide excellent result in removing bacteria, viruses and apart from salts from tabs/tube well water. While the above state of the art to go to reveal the provision gadget/means to purify drinking water especially by way of removal of bacteria, viruses and salts, it is found that the desired removal of salt which is mostly attended involving the reverse osmosis means is accompanied with problem of unwanted removal of natural health ingredients/contents from drinking water.
  • reverse osmosis based , purjfiers to pufify water having high salt content is essentially accompan.ied with removal of essential minerals from raw water, which are required by human body from drinking water.
  • reverse osmosis means for purification of water can provide for excellent results in removing bacteria, viruses as well as salts from tap/tube well water, it is found that such purification or purified water obtained through such reverse osmosis system was highly deficient in as far as the requirement of essential natural minerals from raw water required by the human body.
  • Another object of the present invention is directed to reverse osmosis based water purifier which would not only enable removal of salts from tap/tube well water or other water sources having high salt content but would also be capable of removing harmful bacteria/viruses and finally provide for purified water which would contain essential minerals required by the human body.
  • Yet another object of the present invention is directed to provide for a reverse osmosis based water purifier, which would take care of the above, identified problem of demineralization of water treated through reverse osmosis.
  • Yet another object of the present invention is to provide for a reverse osmosis based water purifier adapted to deliver purified water with controlled and desired natural mineral content to provide for safe and healthy purified drinking water. Yet another object of the present invention is directed to provide for a selective combination in reverse osmosis based water purifier system adapted to remove sediment/particulate contaminants, harmful bacteria/virus, removal of excess salts and provide for good quality drinking water having safe and desired levels of health beneficial mineral content.
  • Another object of the present invention is to provide a reverse osmosis based purifier which would be adapted to remove undissoived impurities like sediments, bacteria, viruses as well as dissolved impurities like salts, minerals etc. and yet provide for purified water with controlled natural mineral content.
  • a reverse osmosis based drinking water purifier providing, purified water with controlled natural mineral content comprising:
  • a reverse osmosis based drinking water purifier comprising:
  • the reverse osmosis based drinking water purifier comprises:
  • the said filtration means to free the water of harmful bacteria and viruses is selected from UF membrane and/or UV lamp means.
  • the reverse osmosis ease ⁇ purifier of the invention comprises:
  • the said controlled mineral incorporation of the. reverse osmosis treated water comprises flow control valve means, in the pipeline supplying the mineral containing treated water for mixing with the reverse osmosis treated water,
  • a reverse osmosis based ..drinking water purifier comprising:
  • the said means for providing raw water processed and having desired mineral content comprises filtration means selected from UF membrane and/or UV lamp means for removal and/or killing of harmful bacteria and viruses.
  • the reverse osmosis based drinking water 1 purifier comprising:
  • reverse osmosis based purifier can be selectively and advantageously combined with sediment filter, activated carbon filter and UF/UV filtration means. It is also preferred to provide twin membrane filtration means for better quality generation of the purified water.
  • the water purifier involving such selective combination is adapted to deliver quality drinking water depending upon the requirements of the end user especially by way of providing for means for regulated and controlled incorporation of natural minerals in the purified water.
  • the said controlled mineral incorporation of the reverse osmosis treated water comprises flow control Valve means in trie pipeline supplying the mineral containing UF/UV treated water for mixing with the reverse osmosis treated water.
  • reverse osmosis based water purifier further comprises means for controlling the TDS level in purified water.
  • the water purifier of the invention provides for selectively controlling the desired amount of mineral content in punrie ⁇ water, wnicn would add to the much-desired flexibility in providing quality, and uses specific purified drinking water.
  • the water purifier selectively provides for controlling not only the unwanted complete demineralised of reverse osmosis treated water but also the amount of harmful bacteria/virus free water containing desired natural minerals in the final purified water discharged through the unit there by providing for possible monitoring of quality of water generated by the device.
  • reverse osmosis based water purified of the invention with desired mineral content can be provided involving selective combination of reverse osmosis gadget/means and providing means of delivered partially purified water with controlled mineral content.
  • reverse osmosis means which generates reverse osmosis treated water and mixes with purified water having controlled mineral content to be finally purified by UF membrane or UV lamp to remove bacteria and viruses.
  • the water purifier of the invention comprises of reverse osmosis means which parallel generates reverse osmosis treated water along with UF/UV processed water to there by provide for purified water with desired mineral content.
  • the water purifier of the invention is preferably provided with online flow control where by it is possible to selectively control using the water purifier of the invention the proportionate mix of the reverse osmosis treated water with natural mineral fortified purified drinking water.
  • Fig 1 is schematic illustration of an embodiment of the water purifier of the invention involving reverse osmosis membrane and UF membrane in accordance with the invention
  • FIG. 1 is schematic illustration of another embodiment of the water purifier of the invention involving reverse osmosis membrane and UF membrane;
  • Fig 3 is yet another schematic illustration of an embodiment of the water purifier of the invention involving reverse osmosis membrane and UV lamp;
  • Fig 4 is yet further schematic illustration of another embodiment of the water purifier of the invention involving reverse osmosis membrane and UV lamp;
  • Fig 1 illustrates the first embodiment of the invention in particular the water purifier adapted for pre-mixing and involving ultra fine membrane as secondary purification means.
  • the water purifier is adapted and selectively disposed with reverse osmosis and filtration means such that water reach in salt content and contaminated with bacteria, viruses and organic compounds is first allowed traverse through a sediment filter (1) to remove suspended particulars from raw water,. Thereafter the water Jn the device is allowed to pass through an activated carbon filter (2) adapted to remove any organic compounds. Next the water is pressurized involving pump means (3) and the output is bifurcated such that one channel is fed into a reverse osmosis membrane (4) and the other channel goes into a flow control valve (5).
  • the purified water coming out of the reverse osmosis membrane (4) is the demineralised water which is then mixed with pressurized water (partially purified) using flow control valve (5) to obtain mixed water having controlled natural minerals.
  • the water purifier of the invention not only provides for adding the much required natural mineral in reverse osmosis purified water but also provides for flexibility in controlling the amount of mineral content in the purified water generated by the purifier.
  • the pressurized water flow can be
  • the final form of the purified water generated by the purifier controls natural mineral contents, which is required for adding health benefits to such purified drinking water.
  • the purifier before its discharge outlet provides for traversal of the water through a hollow UF membrane element (7) of about 0.001 Micron pores for removing all bacteria/viruses from it and to produce purified water free of impurities and controlled natural mineral content.
  • Fig 2 illustrates a second embodiment of the water purifier of the invention.
  • the purifier of this embodiment is having a selective different combination of features from that of the first embodiment so as to provide for a post mixing provision instead of pre-mixing provision as that of the first embodiment )
  • the raw water is first allowed to pass through a sediment filter (1) and then through an activated carbon filter (2).
  • Water is thereafter allowed to pressurized using pump means (3) and the output is bifurcated such that one channel is fed into a reverse osmosis membrane (4) and the other into UF membrane (5).
  • the purified water passing though the reverse osmosis membrane (4) is demineralised and thereafter mixed with purified water coming out of the UF membrane (5).
  • a flow valve (7) is provided to selectively deliver purified water with desired controlled natural minerals.
  • FIG 3 illustrates another embodiment of the water purifier in accordance with the present invention.
  • the same is basically in line with the arrangement as per first embodiment except that instead of the provision of UF membrane, this embodiment after the mixing and adjustment of natural mineral content the mixed water is processed through a UV lamp (7) adapted to deactivate bacteria and viruses and provide purified water with controlled minerals.
  • FIG. 4 illustrates another embodiment of the water purifier in accordance with the present invention.
  • the same is basically in line with the arrangement as per third embodiment except that the pressurized water generated by the pump means (3) is bifurcated into a reverse osmosis membrane (4) and a UV lamp (5) instead of a UF membrane.
  • the output of reverse osmosis membrane (4), and UV lamp is bifurcated into a reverse osmosis membrane (4) and a UV lamp (5) instead of a UF membrane.
  • the purifier of the invention provides for a selective reverse osmosis and UF/UV purification means which enable simple, cost effective and user- friendly compact purifier device for household purposes.

Abstract

The present invention discloses a house hold reverse osmosis based drinking water purifier having controlled natural mineral content in purified water which comprises of means for subjecting the raw water to reverse osmosis purifier to provide treated demineralised water and means for controlled natural mineral incorporation in the said de-mineralized water by purifying the water through UF and/or UV treatment and to thereby provide for a reverse osmosis treated and controlled natural mineral content purified water'

Description

The present invention relates to a water purifier and, in particular, to a household reverse osmosis based drinking water purifier adapted for controlled natural mineral content in generated purified water. The reverse osmosis based water purifier adapted for delivery of purified water with controlled natural mineral content is simple and cost effective and serves to provide safe and healthy drinking water suitable for household purposes. The water purifier of the invention is adapted compact and user-friendly configuration of reverse osmosis based purifier so as to facilitate its ready and wide application even in remote locations.
BACKGROUND ART
Drinking water contamination is a serious health concern '.and with the water resources being polluted gradually with various sources of contamination, provision of pure and safe drinking water has been a continuing concern in the related field.
While variety of drinking water purifier means/system have been developed and provided from time to time, the complexities of contamination and removal of
- harmful contaminants and yet providing for a safe and healthy drinking water is found to be extremely challenging.
Over the years various means to purify drinking water have been provided in the art ranging from activated carbon purifier, membrane filtration, sediment filters, ultra violet lamp as filtration means as well as reverse osmosis to provide for purified drinking water.
US 5,928,503 disclose a desktop drinking water machine and include a reverse osmosis mechanism consisting of a reverse osmosis filter and a pair of active carbon filters. The reverse osmosis mechanism is linked to a pump through an inlet pipe, a pure water pipe connected to a reservoir and an outlet pipe connected to the original reservoir where both pipes link the original reservoir to the pump. A water level sensor in the reservoir is linked with the pump through a processor to control a water pumping operation. When the water level rises above the water level sensor, the pump is initiated and delivers water from the reservoir into the reverse osmosis mechanism. Pure water then flows into the storage tank and wastewater flows to the reservoir. When the volume of the water in the reservoir is approximately one-third of the volume of the original water maintained in the reservoir, the pump is deactivated. At this time, the purified water contained in the storage tank approximates two-thirds of the volume of the water in the reseWoir, which provides for an increased purifying rate.
US 6,383,384 is directed to An apparatus for purifying water that uses a synchronous combination of a worm gear and spring assembly that delivers constant mechanical energy for sustaining continuous filtration operations without the concomitant repetitious cranking that has been commonly prerequisite in the art. A simple means for storing energy as a ready reservoir for pressure-driving an aqueous solution through semi permeable membranes to produce purified water. An electric motor may be provided particularly to support mass production of fresh water from salt water. The electric motor is preferably applied intermittently to engender sufficient energy storage to sustain continuous filtration.
US 6,579,451 teaches* a water desalting installation which comprises at least an auxiliary pump and another high pressure pump in parallel with an internal circulation pump, and at least one pair of feed chamber which are pressurized alternatively, each of them forming a closed circuit, preferably toroidal, so that the water circulates always in the same direction and continuously, taking advantage of its kinetic energy in the valve actuation; it may have separation means to separate the water masses of different salinity, said separation means being comprised of pistons having a spherical shape and of which the apparent density is similar to that of the water, said pistons being retained briefly during the cycle change by baskets or equivalent devices, while the water circulates to the expense of its kinetic energy, the cycle changes being controlled by approximation and housing sensors, or by flow meters or by salinity measures when such separation means are not available.
It would be apparent from the above that the provision of reverse osmosis based water purifiers is well known and commonly in use. Importantly however such reverse osmosis based water purifiers are basically used for purifying water having high salt content. Moreover, also such reverse osmosis based purifiers are found to provide excellent result in removing bacteria, viruses and apart from salts from tabs/tube well water. While the above state of the art to go to reveal the provision gadget/means to purify drinking water especially by way of removal of bacteria, viruses and salts, it is found that the desired removal of salt which is mostly attended involving the reverse osmosis means is accompanied with problem of unwanted removal of natural health ingredients/contents from drinking water. Importantly, it is found by way of the present invention thatΛ.the use of reverse osmosis based , purjfiers to pufify water having high salt content is essentially accompan.ied with removal of essential minerals from raw water, which are required by human body from drinking water. Thus while reverse osmosis means for purification of water can provide for excellent results in removing bacteria, viruses as well as salts from tap/tube well water, it is found that such purification or purified water obtained through such reverse osmosis system was highly deficient in as far as the requirement of essential natural minerals from raw water required by the human body.
OBJECTS OF THE INVENTION
It is thus the basic object of the present. invention to provide for a reverse osmosis based water purifier which would be capable of generating pure drinking water with desired controlled natural mineral content to make the s purified water1 safe and healthy to drink.
Another object of the present invention is directed to reverse osmosis based water purifier which would not only enable removal of salts from tap/tube well water or other water sources having high salt content but would also be capable of removing harmful bacteria/viruses and finally provide for purified water which would contain essential minerals required by the human body.
Yet another object of the present invention is directed to provide for a reverse osmosis based water purifier, which would take care of the above, identified problem of demineralization of water treated through reverse osmosis.
Yet another object of the present invention is to provide for a reverse osmosis based water purifier adapted to deliver purified water with controlled and desired natural mineral content to provide for safe and healthy purified drinking water. Yet another object of the present invention is directed to provide for a selective combination in reverse osmosis based water purifier system adapted to remove sediment/particulate contaminants, harmful bacteria/virus, removal of excess salts and provide for good quality drinking water having safe and desired levels of health beneficial mineral content.
Another object of the present invention is to provide a reverse osmosis based purifier which would be adapted to remove undissoived impurities like sediments, bacteria, viruses as well as dissolved impurities like salts, minerals etc. and yet provide for purified water with controlled natural mineral content.
SUMMARY OF THE INVENTION
Thus according to the basic aspect of the present invention there is provided a reverse osmosis based drinking water purifier providing, purified water with controlled natural mineral content comprising:
means for subjecting the water to reverse osmosis to provide treated de-mineralised water and means for controlled natural mineral incorporation in said treated de- mineralised water to thereby provide for a reverse osmosis treated and controlled natural mineral content purified water.
It is thus possible by way of the above disclosed water purifier to provide of reverse osmosis based water purifier which would not have the limitation of producing totally de-mineralised health affecting water and thereby make such water purifiers involving reverse osmosis more beneficial for producing safe and quality drinking water.
In accordance with an aspect of the present invention there is provided a reverse osmosis based drinking water purifier comprising:
a) means for subjecting the water to demineralization of raw water by reverse osmosis; b) means for providing partially purified water and having desired mineral content;
c) system for online mixing the said de-mineralised reverse osmosis treated water with said partially purified mineral containing water; and
d) filtration means for purifying the mix generated by the system in (c) above.
In accordance with a preferred aspect the reverse osmosis based drinking water purifier comprises:
a) meaps for subjecting the water to demineralization of raw water by reverse osmosis;
b) means for providing partially purified water having desired mineral content;
c) system for online mixing of the said demineralised reverse osmosis treated water with said partially purified mineral containing water; and
d) filtration means to free the water of harmful bacteria and viruses and purifying the mix generated by the system in (c) above.
Advantageously and selectively the said filtration means to free the water of harmful bacteria and viruses is selected from UF membrane and/or UV lamp means.
In accordance with an embodiment the reverse osmosis oaseα purifier of the invention comprises:
(a) sediment filtration means preferably 5.00 microns;
(b) activated carbon filter (c) passing a part of treated water from (b) above partly at high pressure • through reverse osmosis membrane to demineralize raw water by reverse osmosis and;
(d) mixing the demineralised water through said reverse osmosis membrane with the remainder of the treated water from (b) at controlled rate;
(e) filtration means to free the thus mixed water of (d) above of harmful bacteria and viruses selectively involving UF membrane and/or UV lamp.
In. the above purifier device the said controlled mineral incorporation of the. reverse osmosis treated water comprises flow control valve means, in the pipeline supplying the mineral containing treated water for mixing with the reverse osmosis treated water,
In accordance with another aspect of . the present invention there is provided a reverse osmosis based ..drinking water purifier comprising:
(a) means for subjecting the water to demineralization by reverse osmosis; .
(b) means for providing raw water processed and having desired mineral content;
(c) system for online mixing the said demineralised reverse osmosis treated water with said raw processed and desired mineral containing water.
Preferably, the said means for providing raw water processed and having desired mineral content comprises filtration means selected from UF membrane and/or UV lamp means for removal and/or killing of harmful bacteria and viruses.
In accordance with another embodiment the reverse osmosis based drinking water1 purifier comprising:
(a) sediment filtration means preferably 5.00 microns; Ch) activated carbon filter
(c) passing a part of treated water from (b) above partly at high pressure through reverse osmosis membrane to demineralize raw water by reverse osmosis and partly through harmful bacteria/virus removal means selected from UF membrane and/or UV lamp;
(d) controlled mixing, of the reverse osmosis treated water, and the ,UF membrane and/or UV lamp treated water to obtain the purified water.
It is found by way of another aspect of the invention that reverse osmosis based purifier can be selectively and advantageously combined with sediment filter, activated carbon filter and UF/UV filtration means. It is also preferred to provide twin membrane filtration means for better quality generation of the purified water. The water purifier involving such selective combination is adapted to deliver quality drinking water depending upon the requirements of the end user especially by way of providing for means for regulated and controlled incorporation of natural minerals in the purified water.
In the above embodiment also the said controlled mineral incorporation of the reverse osmosis treated water comprises flow control Valve means in trie pipeline supplying the mineral containing UF/UV treated water for mixing with the reverse osmosis treated water.
In accordance with yet further aspect the reverse osmosis based water purifier further comprises means for controlling the TDS level in purified water.
Importantly the above provide for a selective household drinking water purifier involving reverse osmosis and UF/UV gadget means adapted to deliver water which would be salt free, harmful bacteria/virus free but importantly not totally demineralised but containing controlled amounts of natural mineral,
Preferably and advantageously the water purifier of the invention provides for selectively controlling the desired amount of mineral content in punrieα water, wnicn would add to the much-desired flexibility in providing quality, and uses specific purified drinking water. The water purifier selectively provides for controlling not only the unwanted complete demineralised of reverse osmosis treated water but also the amount of harmful bacteria/virus free water containing desired natural minerals in the final purified water discharged through the unit there by providing for possible monitoring of quality of water generated by the device.
It would be apparent from the above that the reverse osmosis based water purified of the invention with desired mineral content can be provided involving selective combination of reverse osmosis gadget/means and providing means of delivered partially purified water with controlled mineral content.
In accordance with 'orfe aspect of the water purifier of the invention the same is provided with reverse osmosis means which generates reverse osmosis treated water and mixes with purified water having controlled mineral content to be finally purified by UF membrane or UV lamp to remove bacteria and viruses.
In accordance with another aspect of. the. invention the water purifier of the invention comprises of reverse osmosis means which parallel generates reverse osmosis treated water along with UF/UV processed water to there by provide for purified water with desired mineral content.
Importantly the water purifier of the invention is preferably provided with online flow control where by it is possible to selectively control using the water purifier of the invention the proportionate mix of the reverse osmosis treated water with natural mineral fortified purified drinking water.
BRIEF DESCRIPTION OF THE DRAWINGS
The- details of the invention, its objects and advantageous are1 explained hereunder in greater detail in relation to non-limiting exemplary illustration of the water purifier involving reverse osmosis means/membrane in accordance with the invention adapted to generate purified drinking water with controlled mineral content as per the accompany figures wherein:
Fig 1 is schematic illustration of an embodiment of the water purifier of the invention involving reverse osmosis membrane and UF membrane in accordance with the invention;
Fig 2 is schematic illustration of another embodiment of the water purifier of the invention involving reverse osmosis membrane and UF membrane;
Fig 3 is yet another schematic illustration of an embodiment of the water purifier of the invention involving reverse osmosis membrane and UV lamp;
Fig 4 is yet further schematic illustration of another embodiment of the water purifier of the invention involving reverse osmosis membrane and UV lamp;
Reference is first invited to accompany Fig 1, which illustrates the first embodiment of the invention in particular the water purifier adapted for pre-mixing and involving ultra fine membrane as secondary purification means. As illustrated in said figure the water purifier is adapted and selectively disposed with reverse osmosis and filtration means such that water reach in salt content and contaminated with bacteria, viruses and organic compounds is first allowed traverse through a sediment filter (1) to remove suspended particulars from raw water,. Thereafter the water Jn the device is allowed to pass through an activated carbon filter (2) adapted to remove any organic compounds. Next the water is pressurized involving pump means (3) and the output is bifurcated such that one channel is fed into a reverse osmosis membrane (4) and the other channel goes into a flow control valve (5). Some of the water entering the reverse osmosis membrane is rejected as it is used for . washing away excessive slats and impurities from the membrane via the flow restricted tube (6). The purified water coming out of the reverse osmosis membrane (4) is the demineralised water which is then mixed with pressurized water (partially purified) using flow control valve (5) to obtain mixed water having controlled natural minerals. Importantly the water purifier of the invention not only provides for adding the much required natural mineral in reverse osmosis purified water but also provides for flexibility in controlling the amount of mineral content in the purified water generated by the purifier. In particular the pressurized water flow can be
Cr . regulated to increase or decrease the amount of mineral in the mixed water. The final form of the purified water generated by the purifier controls natural mineral contents, which is required for adding health benefits to such purified drinking water. Moreover the purifier before its discharge outlet provides for traversal of the water through a hollow UF membrane element (7) of about 0.001 Micron pores for removing all bacteria/viruses from it and to produce purified water free of impurities and controlled natural mineral content.
Reference is now invited to accompanying in Fig 2, which illustrates a second embodiment of the water purifier of the invention. As illustrated in said, figure the purifier of this embodiment is having a selective different combination of features from that of the first embodiment so as to provide for a post mixing provision instead of pre-mixing provision as that of the first embodiment), In this embodiment the raw water is first allowed to pass through a sediment filter (1) and then through an activated carbon filter (2). Water is thereafter allowed to pressurized using pump means (3) and the output is bifurcated such that one channel is fed into a reverse osmosis membrane (4) and the other into UF membrane (5). The purified water passing though the reverse osmosis membrane (4) is demineralised and thereafter mixed with purified water coming out of the UF membrane (5). Likewise the embodiment of figure 1, a flow valve (7) is provided to selectively deliver purified water with desired controlled natural minerals.
Reference is now invited to accompanying figure 3, which illustrates another embodiment of the water purifier in accordance with the present invention. As would be apparent from the schematic illustration of this embodiment the same is basically in line with the arrangement as per first embodiment except that instead of the provision of UF membrane, this embodiment after the mixing and adjustment of natural mineral content the mixed water is processed through a UV lamp (7) adapted to deactivate bacteria and viruses and provide purified water with controlled minerals.
Reference is now invited to accompanying figure 4, which illustrates another embodiment of the water purifier in accordance with the present invention. As would be apparent from the schematic illustration of this embodiment the same is basically in line with the arrangement as per third embodiment except that the pressurized water generated by the pump means (3) is bifurcated into a reverse osmosis membrane (4) and a UV lamp (5) instead of a UF membrane. Importantly likewise the other embodiments .the output of reverse osmosis membrane (4), and UV lamp
(5) are selectively combined using flow control valve (7) to obtain purified water with controlled minerals.
It is thus possible by way of above disclosed water purifier in particular reverse osmosis based drinking water purifier which would enable providing purified water with controlled natural minerals for safe and healthy consumption especially for household purposes. The purifier of the invention provides for a selective reverse osmosis and UF/UV purification means which enable simple, cost effective and user- friendly compact purifier device for household purposes.

Claims

We Claim:
1. A reverse osmosis based drinking water purifier providing purified water with controlled natural mineral content comprising:
means for subjecting the water to reverse osmosis to provide treated demineralised water and means for controlled natural mineral incorporation in said treated demineralised water to thereby provide for a reverse osmosis treated and controlled natural mineral content purified water.
2. A reverse osmosis based drinking water purifier as claimed in claim 1 comprising:
(a) means for subjecting the water to demineralization of raw water by reverse osmosis;
(b) means for providing partially purified water and having desired mineral . content;
(c) system for online mixing the said demineralised reverse osmosis treated water with said partially purified mineral containing water; and
(d) filtration means for purifying the mix generated by the system in (c) above.
3. ^A reverse osmosis based drinking water purifier as claimed in anyone of claims 1 Or 2 comprising:
(a) means for subjecting the water to demineralization of raw water by reverse osmosis;
(b) means for providing partially purified water having desired mineral content;
(c) system for online mixing of the said demineralised reverse osmosis treated water with said partially purified mineral containing water; and (d) filtration means to free the water of harmful bacteria and viruses and purifying the mix generated by the system in (c) above.
4. A reverse osmosis based drinking water purifier as claimed in anyone of claims 1 to 3 wherein said filtration means to free the water of harmful1 bacteria arid viruses is selected from UF membrane and/or UV lamp means.
5. A reverse osmosis based drinking water purifier comprising:
(a) sediment filtration means preferably 5.00 microns;
(b) activated carbon filter
(c) passing a part of treated water from (b) above partly at high pressure through reverse osmosis membrane to demineralize raw water by reverse osmosis and;
(d) mixing the demineralised water through said reverse osmosis membrane with the remainder of the treated water from (b) at controlled rate;
(e) filtration means to free the thus mixed water of (d) above of harmful bacteria and viruses selectively involving UF membrane and/or UV lamp.
6. A reverse osmosis based drinking water purifier as claimed in anyone of claims 1 to 5 wherein said controlled mineral fortification of the reverse osmosis treated water comprises flow control valve in the. pipeline supplying the mineral containing treated water for mixing with the reverse osmosis treated water.
7. A. reverse osmosis based drinking water purifier as claimed in claim 1 comprising:
(a) means for subjecting the water to demineralization by reverse osmosis;
(b) means for providing raw water processed and having desired mineral content; (c) system for online mixing the said demineralised reverse osmosis created water with said raw processed and desired mineral containing water.
8. A reverse osmosis based drinking water purifier as claimed in claim 7 wherein said means for providing raw water processed and having desired mineral content comprise filtration means selected from UF membrane and/or UV lamp means for removal and/or killing of harmful bacteria and viruses.
9. A reverse osmosis bέ'sed drinking water purifier comprising: . (a) sediment filtration means preferably 5.00 microns;
(b) activated carbon filter
(c) passing a part of treated water from (b) above partly at high pressure through reverse osmosis membrane to de mineralize raw water by reverse osmosis and partly through harmful bacteria/virus removal means selected from UF membrane and/or UV lamp;
(d) controlled mixing of the reverse osmosis treated water and the UF membrane and/or UV lamp treated water to obtain the purified water.
10.A reverse osmosis based drinking water purifier as claimed in anyone of claims 7 to 9 wherein said controlled mineral fortification of the reverse osmosis treated water comprises flow control valve means in the pipeline supplying the mineral containing UF/UV treated water for mixing with the reverse osmosis treated water.
11. A reverse osmosis based drinking water purifier as claimed in anyone of claims 1 to 10 comprising means, for controlling the TDS level in purified water.
12. A reverse osmosis based drinking water purifier as claimed in anyone of claims 1 to 11 comprising twin membrane filtration means.
13. A reverse osmosis based drinking water purifier for providing purified water with controlled natural minerals content substantially as herein described and illustrated with reference to the accompanying figures.
PCT/IN2006/000055 2005-07-20 2006-02-22 A household reverse osmosis based drinking water purifier WO2007010549A1 (en)

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EP2203392A2 (en) * 2007-10-15 2010-07-07 Aquamall Water Solutions Ltd. An integrated water purifier assembly with built-in water condition assessing sensor
WO2011042885A1 (en) * 2009-10-09 2011-04-14 Befreetec Ltd Water filtration and purification method and device for implementing same
WO2011147656A1 (en) 2010-05-24 2011-12-01 Unilever Nv Water purification device
ITMI20101812A1 (en) * 2010-10-04 2012-04-05 Erre Due S N C Di Renzo Ricca E C DEVICE FOR WATER TREATMENT, PARTICULARLY FOR DOMESTIC USE.
WO2012136220A1 (en) * 2011-04-04 2012-10-11 Pure H2O A/S Mobile water purification system
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ITCZ20110013A1 (en) * 2011-08-04 2013-02-05 Pietro Mazzeo SYSTEM FOR THE PRODUCTION OF PURIFIED WATER WITH TDS CONTROL - TOTAL DISSOLVED SALT.
CN107176732A (en) * 2016-03-11 2017-09-19 王沛 A kind of new water purifier
CN107840475A (en) * 2017-11-15 2018-03-27 东莞奥拓电子科技有限公司 A kind of intelligent water purifier
US20200346138A1 (en) * 2019-04-30 2020-11-05 King's Flair Marketing Limited Fluid filter for treating the fluid, a container comprising the same and air release device
CN112830609A (en) * 2019-11-25 2021-05-25 天津大学 Drinking water purification system and method
US11597669B1 (en) 2022-07-27 2023-03-07 Core Pacific Inc. Apparatus for mineralizing drinking water

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Cited By (17)

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EP2203392A4 (en) * 2007-10-15 2012-07-04 Aquamall Water Solutions Ltd An integrated water purifier assembly with built-in water condition assessing sensor
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WO2012136220A1 (en) * 2011-04-04 2012-10-11 Pure H2O A/S Mobile water purification system
ITCZ20110013A1 (en) * 2011-08-04 2013-02-05 Pietro Mazzeo SYSTEM FOR THE PRODUCTION OF PURIFIED WATER WITH TDS CONTROL - TOTAL DISSOLVED SALT.
CN107176732A (en) * 2016-03-11 2017-09-19 王沛 A kind of new water purifier
CN107176732B (en) * 2016-03-11 2021-07-30 北京快知行科技有限公司 Novel water purifier
CN107840475A (en) * 2017-11-15 2018-03-27 东莞奥拓电子科技有限公司 A kind of intelligent water purifier
US20200346138A1 (en) * 2019-04-30 2020-11-05 King's Flair Marketing Limited Fluid filter for treating the fluid, a container comprising the same and air release device
US11857896B2 (en) * 2019-04-30 2024-01-02 King's Flair Marketing Limited Fluid filter for treating the fluid, a container comprising the same and air release device
CN112830609A (en) * 2019-11-25 2021-05-25 天津大学 Drinking water purification system and method
US11597669B1 (en) 2022-07-27 2023-03-07 Core Pacific Inc. Apparatus for mineralizing drinking water

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