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WO2000009450A1 - Epurateur d'eau portable a source uv - Google Patents

Epurateur d'eau portable a source uv Download PDF

Info

Publication number
WO2000009450A1
WO2000009450A1 PCT/US1999/018355 US9918355W WO0009450A1 WO 2000009450 A1 WO2000009450 A1 WO 2000009450A1 US 9918355 W US9918355 W US 9918355W WO 0009450 A1 WO0009450 A1 WO 0009450A1
Authority
WO
WIPO (PCT)
Prior art keywords
ultraviolet light
container
light source
ultraviolet
purification system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1999/018355
Other languages
English (en)
Inventor
Eric L. Lifschitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU55588/99A priority Critical patent/AU747459B2/en
Priority to IL14136999A priority patent/IL141369A0/xx
Priority to US09/601,817 priority patent/US6514405B1/en
Priority to EP99942145A priority patent/EP1113994A4/fr
Publication of WO2000009450A1 publication Critical patent/WO2000009450A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C02F1/325—Irradiation devices or lamp constructions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/009—Apparatus with independent power supply, e.g. solar cells, windpower or fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment
    • Y02A20/208—Off-grid powered water treatment
    • Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation

Definitions

  • the present invention relates generally to a water purification apparatus and, more particularly, to a portable water purifying and germicidal disinfecting system that utilizes ultraviolet radiation to prepare water for human consumption.
  • Natural water supplies can be contaminated by any number of disease-carrying microorganisms, from bacteria to protozoa to viruses. Consuming water that contains these organisms can lead to cramps, vomiting, diarrhea and even more serious medical problems. For water to be safe to drink, these microorganisms must be either rendered inactive or removed.
  • U.S. Patent No. 4,849,100 issued to Papandrea discloses a portable water purifier which shuts off the water flow therethrough upon sensing that the ultraviolet light intensity has fallen below a predetermined level, in an attempt to ensure that all of the water is sufficiently purified.
  • U.S. Patent No. 4,755,292 issued to Merriam discloses a portable ultraviolet water sterilizer with ultraviolet reflective sidewalls, in an attempt to shield the user from harmful ultraviolet radiation and cause the water to be efficiently exposed to ultraviolet light.
  • a portable water system must be compact, lightweight, and convenient to use.
  • a portable water purification system must be effective in purifying water to a suitable quality. It is also desirable that such a system not require the addition of chemicals and the like to be added to the water which either may lessen the quality of the treated water or require additional supplies.
  • U.S. Patent No. 4,849, 100 issued to Papandrea discloses a portable water purifier which shuts off the water flow therethrough upon sensing that the ultraviolet light intensity has fallen below a predetermined level, in an attempt to ensure that all of the water is sufficiently purified.
  • U. S. Patent No. 4,755,292 issued to Merriam discloses a portable ultraviolet water sterilizer with ultraviolet reflective sidewalls, in an attempt to shield the user from harmful ultraviolet radiation and cause the water to be efficiently exposed to ultraviolet light.
  • these devices fall short of providing an efficient, durable, convenient, reliable portable purification device for drinl ing water.
  • the Merriam device is not shaped to be carried but is more of a bucket, the light source does not secure or seal to the container, the container does not seal, and there is no provision for cooling the light source.
  • the Papandrea device requires water to flow therethrough making it poorly suited to portable use.
  • the portable water purification system of the present invention includes a container in which water is to be placed. Attached to the container is an ultraviolet light source which irradiates the water, the inside surfaces of the top and side portions of the container are coated with an ultraviolet reflective material. The entire container is made of a material opaque to ultraviolet light. A battery is provided in order to provide power to the ultraviolet light source. Additionally, a sensor is provided in order to determine when the water being purified has received an adequate dose of ultraviolet radiation. Upon this determination the operator of the purification device is notified and the ultraviolet light source of the present invention is automatically shut off.
  • Fig. 1 is an elevated view of a first preferred embodiment of the present invention
  • Fig. 2 is an elevated view of a second preferred embodiment of the present invention
  • Fig. 3 is an elevated exploded view of an alternative embodiment of the present invention.
  • the portable liquid purification system 10 includes a container surface 12, which generally defines the boundaries of a liquid container 11.
  • Water, or another liquid intended for human consumption may be poured into the container 11.
  • a lid 14 is then placed on the container 11 so as to seal the purification system 10 from being in liquid communication with its surroundings.
  • An ultraviolet light source 18 is removably secured to the bottom of the container surface 12 in order to provide the liquid inside the container 1 1 with ultraviolet radiation.
  • the ultraviolet radiation is provided by an ultraviolet bulb (not shown in Fig. 1) of a type well known to those skilled in the art, an integral component of the ultraviolet light source 18.
  • the ultraviolet bulb may be a deuterium lamp, or a high-pressure gas-filled arc lamp containing argon, xenon, or mercury, as is known in the art.
  • the ultraviolet bulb may be powered by a battery, AC adapter, or solar cell
  • the ultraviolet bulb is contained in the ultraviolet light source 18 by a lens 22 and a source wall 20.
  • the lens 22 is generally transparent with respect to ultraviolet light, and may be formed from quartz, fused silica, or a high tensile plastic resistant to discoloration and degradation.
  • the container 11 does not have a bottom wall, but instead the source 18 seals off the bottom of the container when it is inserted into the recess 24. This provides the benefit of allowing heat from the source 18 to conduct directly to the liquid in the container, thereby cooling the source
  • the lack of a bottom wall also allows a user to thoroughly clean the inside of the container 11 when the source is removed, thereby removing buildup from the inner surface.
  • the source 18 may be sealed to the bottom of the container 11. For example, it may snap into place and seal off the bottom. When the source 18 is removed, a cover may be provided for sealing the bottom of the container 11 so that water may be sterilized and stored without tying up the source. In this way, the source 18, may be used with multiple containers. Alternatively, the container may have a transparent-to-ultraviolet bottom wall so that the container 11 will hold a liquid when the source 18 is removed without the need for a cover. Either way, because ultraviolet radiation passes from the source, through the lens 22, and into the container 11 , the ultraviolet radiation generated by the ultraviolet bulb is allowed to effect the liquid in the container 11.
  • the container surface 12, as well as the source wall 20, are substantially opaque to ultraviolet radiation. Additionally, the device will preferably shutoff, or not turn on, if the lid 14, also made of a material substantially opaque with respect to ultraviolet light, is not secured to the container surface 12. These characteristics protect the user from harmful ultraviolet radiation, which has been shown, in substantial doses, to deteriorate human health.
  • a reflective coating 16 is provided along the inner surface of container surface 12.
  • the reflective coating 16 is substantially reflective with respect to ultraviolet light so as to cause the liquid in the container to absorb a maximum amount of the ultraviolet radiation emitted by the ultraviolet bulb.
  • a second purification system 10 is there shown. This embodiment is similar to that illustrated in Fig. 1. However, this embodiment additionally includes an ultraviolet sensor 26.
  • the ultraviolet sensor 26 determines when a sufficient amount of ultraviolet radiation has been emitted to the liquid for the liquid to be safe for consumption. Upon making such a determination, the ultraviolet sensor 26 preferably causes the ultraviolet bulb to stop emitting ultraviolet light. Additionally, or alternatively, the user is notified in some manner that the purification of the liquid has been completed.
  • This ultraviolet sensor 26 may be a photovoltaic cell, phototube, photomultiplier tube, or silicon diode, as is well known in the art. Obviously, the sensor 26 may be used with other embodiments of the present invention. As is known to those of skill in the art, the output of an ultraviolet light source 18 may degrade over time due to aging. Also, the amount of ultraviolet reaching the liquid may drop if the transparency of the lens 22 drops or sedimentation occurs. The sensor 26 allows a user to compensate for this effect and to make sure the liquid is ready to drink. As the light source 18 ages, the sensor will take longer to trigger, thereby increasing the useful life of the source 18. It also avoids over use of the light source 18, preventing premature battery discharge.
  • Fig. 2 also shows that the ultraviolet light source 18, as well as the bottom portion of the container surface 12 may be threaded so as to allow the ultraviolet light source 18 to be screwed into abutment with the container surface 12. Obviously, the ultraviolet light source 18 may also be removed in an opposite manner.
  • This screw together arrangement is an alternative to the snap together arrangement of Fig. 1. The screw together arrangement works well for containers with circular cross sections, as shown, but would be unsuitable for a container with an elliptical cross section. Another preferred embodiment of the present invention has an elliptical cross section to make the container easier to wear on a user's belt. Other shapes are also possible. Yet another embodiment of the present invention is illustrated in Fig. 3.
  • the ultraviolet bulb 28 protrudes into the container 11 where the liquid is housed.
  • the ultraviolet bulb is surrounded by a lens 22 similar to that of the first two embodiments, of an appropriate shape.
  • Ultraviolet bulbs of the type utilized in this invention may become very hot during operation and burn out.
  • the ultraviolet bulb By providing a greater surface area of contact between the lens 22 and ultraviolet bulb 28, and the liquid, the ultraviolet bulb, will be allowed to cool more easily, and thus avoid burning out. Additionally, the container surface 12 may be formed from a substantially thermal conductive material to indirectly allow the ultraviolet bulb 28 to be cooled more efficiently.
  • a mechanical filter of a type well known to those skilled in the art may be attached to the container surface where the liquid is initially poured into the container 11. In this manner, particulate contaminants may be removed prior to irradiation by ultraviolet light.
  • Ultraviolet light can act as a catalyst in the formation of ozone from oxygen molecules, readily available in ambient air.
  • Ozone like ultraviolet light, is an effective water sterilizing agent. Therefore, by allowing air to come into contact with the liquid being purified by ultraviolet radiation, the sterilizing action of ozone may also be utilized.

Landscapes

  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

L'épurateur d'eau portable (10) de la présente invention inclut un récipient (11) destiné à renfermer le liquide. Il s'accouple à une source UV (18) de façon à purifier le liquide sous l'effet du rayonnement UV.
PCT/US1999/018355 1998-08-12 1999-08-12 Epurateur d'eau portable a source uv Ceased WO2000009450A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU55588/99A AU747459B2 (en) 1998-08-12 1999-08-12 Portable water purifier with ultraviolet light source
IL14136999A IL141369A0 (en) 1998-08-12 1999-08-12 Portable water purifier with ultraviolet light source
US09/601,817 US6514405B1 (en) 1999-08-12 1999-08-12 Portable water purifier with ultraviolet light source
EP99942145A EP1113994A4 (fr) 1998-08-12 1999-08-12 Epurateur d'eau portable a source uv

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US9626098P 1998-08-12 1998-08-12
US60/096,260 1998-08-12

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US09/601,817 A-371-Of-International US6514405B1 (en) 1998-08-12 1999-08-12 Portable water purifier with ultraviolet light source
US10/283,895 Continuation US6767453B2 (en) 1998-08-12 2002-10-30 Portable water purifier with ultraviolet light source

Publications (1)

Publication Number Publication Date
WO2000009450A1 true WO2000009450A1 (fr) 2000-02-24

Family

ID=22256570

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/018355 Ceased WO2000009450A1 (fr) 1998-08-12 1999-08-12 Epurateur d'eau portable a source uv

Country Status (4)

Country Link
EP (1) EP1113994A4 (fr)
AU (1) AU747459B2 (fr)
IL (1) IL141369A0 (fr)
WO (1) WO2000009450A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017086874A1 (fr) * 2015-11-20 2017-05-26 Wallenius Water Ab Dispositif de contenant de boisson de purification de liquide doté de source de lumière uv à émission de champ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4296328A (en) * 1980-02-11 1981-10-20 Regan Michael D Apparatus for producing high purity water
US4762613A (en) * 1985-05-24 1988-08-09 William Still & Sons Limited Water purifiers
US4849100A (en) * 1986-03-07 1989-07-18 North American Aqua Portable water purifier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009814A1 (fr) * 1993-10-06 1995-04-13 Water Recovery Plc Appareil a rayons u.v. pour traitement de fluide
DE4424256C2 (de) * 1994-07-09 1996-08-14 Aweco Kunststofftech Geraete Trinkwasserfilter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4296328A (en) * 1980-02-11 1981-10-20 Regan Michael D Apparatus for producing high purity water
US4762613A (en) * 1985-05-24 1988-08-09 William Still & Sons Limited Water purifiers
US4849100A (en) * 1986-03-07 1989-07-18 North American Aqua Portable water purifier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1113994A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017086874A1 (fr) * 2015-11-20 2017-05-26 Wallenius Water Ab Dispositif de contenant de boisson de purification de liquide doté de source de lumière uv à émission de champ

Also Published As

Publication number Publication date
IL141369A0 (en) 2002-03-10
EP1113994A1 (fr) 2001-07-11
EP1113994A4 (fr) 2003-02-26
AU5558899A (en) 2000-03-06
AU747459B2 (en) 2002-05-16

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