Counter top reverse osmosis water purification system

• US 6,099,735 A
• Filed: 06/04/1998
• Issued: 08/08/2000
• Est. Priority Date: 06/04/1998
• Status: Expired due to Term

• Current Assignee: Maher I. Kelada
• Original Assignee: Maher I. Kelada
• Inventors: Kelada, Maher I.
• Primary Examiner(s): FORTUNA, ANA M
• Application Number:
  US09/090,496
• Time in Patent Office: 796 Days
• Field of Search: 210/257.2, 210/195.2, 210/652, 210/660, 210/440, 210/85, 210/86, 210/97, 210/195.1, 210/134, 210/137, 210/258
• US Class Current: 210/652
• CPC Class Codes: B01D 61/08 Apparatus therefor
• CPC Class Codes: B01D 61/081 used at home, e.g. kitchen
• CPC Class Codes: B01D 61/10 Accessories; Auxiliary operations
• CPC Class Codes: C02F 1/283 using coal, charred products, or inorganic mixtures containing them
• CPC Class Codes: C02F 1/32 with ultraviolet light
• CPC Class Codes: C02F 1/441 by reverse osmosis
• CPC Class Codes: C02F 1/505 by oligodynamic treatment
• CPC Class Codes: C02F 9/20 Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems

Abstract

A counter top reverse osmosis water purification system, suitable for home use, is connected to a water supply and contains a closed fluid treatment circuit extending to a water outlet. The closed fluid circuit flows through a plurality of replaceable water treatment modules mounted on a flowboard and each having a specific water treatment function, such as the removal of a particular material from the water by the use of reverse osmosis, filtration, carbon adsorption, ion exchange or the addition of a chemical to balance the desired water conditions. Preferably the circuit also includes traversing a radiation device, for example an ultraviolet light, for the purpose of sanitizing the water.

Claims

1. A method for treating and purifying water on site, including reverse osmosis, comprising:

providing a flowboard having a plurality of mounting blocks opening from a top surface thereof and flow means interconnecting said blocks within said flowboard;

providing a plurality of water treatment cartridges, each said cartridge being single ended, readily received in and removed from a respective mounting block, and adapted to treat a specific aspect of the water to be purified, at least one of said modules providing reverse osmosis water treatment, at least one cartridge capable of physically treating water by removing suspended and colloidal matter, and at least one cartridge capable of chemically treating the water by the removal of undesirable or all chemicals therefrom thereby improving the purity and taste of the water; and

directing a flow of water sequentially through said cartridges where the water will be treated so as to remove any impurities therein.

2. A counter-top system, including reverse osmosis, for on site treatment of water to provide substantially pure water suitable for human consumption, said system comprising:

flowboard means defining a cavity containing a plurality of mounting blocks and conduit means interconnecting said blocks to form a closed path flow circuit, at least some of said mounting blocks opening on and accessible to an upper surface of said flowboard;

water inlet means and water drain means connected to said flow circuit;

purified water outlet means connected to said flow circuit;

a plurality of single port water treatment cartridges each containing materials suitable for the treatment of water for the purposes of purifying said water, each said cartridge received in a respective mounting block of said flowboard whereby water passing through said system is sequentially treated by passing into and out of the respective cartridges while being treated for removal of substantially all of the impurities contained therein, at least one of said cartridges incorporating reverse osmosis;

valve means mounted in said flowboard and connected in said flow path so as to control the direction of flow through said flowboard; and

a purified water storage tank including means to dispense the purified water.

3. A system according to claim 2 wherein:

each said single port cartridge removes at least one form of contaminant from water passing into and out of said cartridge by passage of water therethrough either axially or coaxially.

4. The counter-top reverse osmosis water purification system according to claim 3 further comprising:

at least one cartridge having a spiral-wound cartridge insert.

5. The counter-top reverse osmosis water purification system according to claim 3 further comprising:

at least one cartridge having an cartridge containing an on-line replaceable single ended ultraviolet lamp contained within concentric sleeves allowing for water circulation and/or for lamp cooling with air.

6. The counter-top reverse osmosis water purification system according to claim 3 further comprising:

pump means received in a respective mounting block to be connected in said flow path to maintain sufficient pressure to circulate the purified water.

7. The counter-top reverse osmosis water purification system according to claim 3 further comprising:

solenoid valve means received in a respective mounting block to be connected in said flow path to control flow of water therethrough.

8. The counter-top reverse osmosis water purification system according to claim 3 further comprising:

needle valve means received in a respective mounting block to be connected into said flow path to control the flow of water therethrough.

9. The counter-top reverse osmosis water purification system according to claim 3 further comprising:

check valve means received in a respective mounting block to be connected into said flow path to control the flow of water therethrough.

10. The counter-top reverse osmosis water purification system according to claim 3 further comprising:

silver impregnated carbon vent disinfection bed received in a respective mounting block to be connected into said flow path so as to prevent the unwanted intake of untreated air into said system.

11. The counter-top reverse osmosis water purification system according to claim 3 further comprising:

vent/drain gap cup received in a respective one of said mounting blocks to be connected into said flow path.

12. A system according to claim 2 wherein:

at least one cartridge dispenses an additive into said water.

13. A system according to claim 2 wherein:

at least one of said cartridges exposes water-passing therethrough to radiation.

14. The counter-top reverse osmosis water purification system according to claim 3 further comprising:

means for interconnecting said flowboard with other like flowboards whereby the system can be expanded and the flow path modified.

15. An apparatus for the treatment of water as necessary for removal of substantially all of the impurities therefrom and/or the addition of taste/purity enhances thereto, said apparatus comprising:

a flowboard defining a cavity having therein a plurality of mounting blocks, conduit means connecting said mounting blocks to form a flow path extending from an inlet to an outlet, and valve means connected in said flow path controlling the direction of flow through said apparatus;

a plurality of single ended cartridges each removably received vertically in a respective one of said mounting blocks, each said cartridge containing therein means to treat water to either remove a specific impurity found in untreated water or to add a water purity/flavor enhancer, at least one of said cartridges incorporating reverse osmosis.

16. The apparatus according to claim 15 wherein at least one of said cartridges comprises:

an ultraviolet lamp encased within concentric spaced sleeves to define an annulus space between the two sleeves whereby cooling air is provided to the lamp.

17. The apparatus according to claim 16 further comprising:

means providing forced convection air draft around said lamp.

18. The apparatus according to claim 15 wherein said valve means comprises:

at least one linear motion valve which, by means of linear movement, opens, isolates or bypasses multiple connections simultaneously thereby controlling direction of flow through the system.

19. The apparatus according to claim 15 wherein the normal flow pattern through each individual cartridge containing particulate filter material is downward through the material to thereby maintain said particles in a packed condition to insure uniform flow therethrough.

20. The apparatus according to claim 15 further comprising:

a thermoelectric water cooler and/or an electric water heater.

21. The apparatus according to claim 15 further comprising:

cover means enclosing said cartridges and secured to said flowboard.

22. The apparatus according to claim 15 further comprising:

electric lock means activated by removal of the cover to de-energize all electrically operated flow board mounted elements.

23. The apparatus according to claim 15 further comprising:

system status indication means including alarms and lights to give a visual indication of the proper operation of said apparatus.

24. The apparatus according to claim 15 further comprising:

lapsed time clock means for monitoring the time interval between servicing of said cartridges; and

flow monitor means measuring the volume of water passing through said apparatus.

25. The apparatus according to claim 15 wherein:

said system preferably operates off 110v AC power with direct current power for the thermoelectric element.

26. The apparatus according to claim 15 further comprising:

at least one cartridge add water treating/conditioning material into the water in said flow path.

27. An improved apparatus for the on-site treatment of water in accordance with claim 15 wherein at least some of said mounting blocks comprise:

a housing having a cylindrical receiving socket blind bore with a cylindrical sleeve fixed coaxially therein to define an inner axial chamber and an outer annular chamber coaxial around said axial chamber, a first port providing fluid communication only with said inner chamber and a second port providing communication with only said annular chamber whereby water can be inserted axially into an associated water treatment cartridge and retrieved annularly from said cartridge or vice versa.

28. The apparatus according to claim 15 wherein at least some of said mounting blocks further comprise:

means for detachably receiving a respective water treatment cartridge by one end vertically therein.

29. The apparatus according to claim 15 wherein said valve means comprises;

at least one linear valve having an elongated housing with an axial bore therein, an elongated valve member extending the length of said bore, means to move said valve member axially along said bore, a plurality of ports intersecting said bore at spaced locations, and valve means secured on said valve member disposed so that movement of said valve member along said bore allow and/or prevents fluid communication between various of said ports.

30. The apparatus according to claim 15 wherein said reverse osmosis cartridge comprises:

at least one spiral wound reverse osmosis membrane housed within a single ended cartridge having a single port containing concentric water inlet, reject water outlet and permeate water outlet.

31. The apparatus according to claim 15 wherein purified water is stored against atmospheric pressure without back pressure and the high differential pressure between the supply header and the storage tank enhances membrane capacity thereby allowing use of a more compact and esthetically acceptable counter top storage vessel, the vessel is provided with a spill proof insert received in the neck of the vessel and engages the inner annular elements of the three-way mounting block, said insert consists of an outer sleeve force fitted into the neck of the water storage vessel and a coaxial outer sleeve which contains an array of slots to allow water to flow from vessel housing downwardly through the annular space of the mounting block, the upper end of the outer sleeve is threaded to engage a threaded shank which supports a purified water feed tube, an overflow tube runs coaxially inside the water feed tube and extends further out to allow for air intake and exhale due to water level fluctuation in the water storage vessel.

32. The apparatus according to claim 15 wherein water treatment cartridges and the storage tank are single ended devices mounted vertically on said flowboard which conceals all connecting piping and fittings.

33. The apparatus according to claim 15 wherein all water treatment modules and flow control devices are provided with only one single threaded connection so that they can be placed on and removed from the flowboard by hand.

34. The apparatus according to claim 15 wherein said valve means are linear valves for controlling purging, recycling, and draining operations of said apparatus with a single motion of each linear valve.

35. The apparatus according to claim 15 wherein:

all electrical wiring is concealed and all electrically operated devices have concentric electrical contact strips of opposite polarity at the top of each of these devices, said contact strips engaging spring-tensioned contacts of equivalent size, aligned above each device and mounted within a protective socket integral to the system housing forming, further comprising interlock means whereby opening the system housing requires that the power cord to the unit be unplugged in order to deactivate the system electrical locks and removing the cover causes all power-supplied fixtures attached to said cover to be momentarily isolated from their associated flow devices mounted on the flowboard, rendering these devices safe for inspection and maintenance.

36. The apparatus according to claim 15 further comprising:

pump means having a drive housing and a pump casing to encapsulate an impeller and its magnet, a vertical wall of said pump housing having series of holes for fluid discharge through a conduit extended through the bottom of the pump casing to a single ended concentric threaded outlet which can be easily engage the thread of a mounting block.

37. The apparatus according to claim 36 wherein said pump means is a single stage pump.

38. The apparatus according to claim 36 wherein said pump is a multi-stage pump to produce higher discharge pressure.

39. The apparatus according to claim 15 further comprising a single ended, top mounted solenoid valve comprising:

a two-part housing defining an upper coil housing to encapsulate a wire coil to be completely isolated from the fluid, and, at the top of said upper part, two concentric electrical contact strips placed on an insulated padding and connected internally to the solenoid coil and externally to a power supply; and

a lower plunger chamber;

a wire coil in the form of a cylinder having a length much greater than its diameter;

a cylindrical iron plunger coated with material to prevent rust formation and mounted for free movement in a vertical plane through a plunger chamber of said housing, the plunger having a rim close to its lower end to prevent the plunger from dropping through the solenoid valve mounting assembly;

wherein passage of direct electric current through a uniformly wound coil of wire creates a magnetic field that draws said plunger into the solenoid.

40. The apparatus according to claim 15 further comprising:

a single ended, vertically mounted check valve which allows water to flow only in one direction, said check valve comprises valve body profiled to engage a mounting block and support a short spring loaded plunger that has slightly tapered tip to easily engage the mounting block internal cylindrical element, it also has a sealing element placed in a groove to maintain proper sealing with the element which serves as a seat for the plunger.

41. The apparatus according to claim 15 further comprising a flowboard mounted high level switch requiring only one point for sensing a flow condition.

42. The apparatus according to claim 15 further comprising a single ended vent disinfection silver impregnated charcoal cartridge consisting of a housing which contains activated charcoal impregnated with silver placed within a filament sac to inhibit entrance of airborne microbes that could possibly enter the system and grow during storage tank filing and emptying, a vent tube connected at its core is secured at the top of the housing to allow for air or water movement across the media.

43. The apparatus according to claim 15 further comprising a single ended vent/drain gap cup comprising a small cup open top having a short cylinder wall with a threaded connection for mounting on a block to maintain a physical gap between the drainage and the sewer system, and the vent system of stored water vessel to prevent microbial contamination, in case of back flow of the drain system for any unforeseen reason, in which case, backed up drain water overflows the cup and does not penetrate the storage vessel.

44. The apparatus according to claim 15 further comprising:

a high level switch controlling the water level in said storage tank.

45. The apparatus according to claim 15 wherein the flow path through the system in the normal service mode is downward through the ion exchange and carbon beds for higher efficiency.

46. The apparatus according to claim 15 wherein:

said storage tank is located intermediate in the flow path; and

further comprising;

mixed bed ion exchange means; and

temperature controlled disinfection means both located down stream of the storage tank to insure the removal of any dissolved gases that could occur during storage.

47. The apparatus according to claim 15 further comprising:

single ended, top mounted pump means connected to overcome pressure drop across the ion exchange bed.