Liquid purification or separation – With preliminary chemical manufacture
Patent
1983-10-17
1986-07-22
Wyse, Thomas
Liquid purification or separation
With preliminary chemical manufacture
210223, C02F 132
Patent
active
046018220
DESCRIPTION:
BRIEF SUMMARY
This invention relates to water purifying apparatus and has been devised particularly though not solely for purifying the water in a swimming pool.
It is a disadvantage of present swimming pool water purifying systems that they entail the use of chemicals which are expensive to purchase and which involve frequent dosing into the pool which is inconvenient and takes up a considerable amount of time both in the dosing and testing procedures. Furthermore swimming pools treated with chlorine or other similar chemicals are often unpleasant to swim in due to the presence of the chemicals in the water.
It is therefore an object of the present invention to provide a water purifying apparatus and a method of purifying pool water which will obviate or minimize the foregoing disadvantages in a simple yet effective manner or which will at least provide the public with a useful choice.
Accordingly in one aspect the invention consists in apparatus for purifying water comprising an outer chamber, an inner chamber located within the outer chamber and having at least a substantial portion of the walls thereof formed from a substantially transparent material, ultra-violet light generating means located within the inner chamber and means to direct the flow of water through said outer chamber and over said inner chamber.
In a further aspect the invention consists in a method of purifying pool water comprising the steps of directing a flow of water from the pool through a chamber and irradiating the water in the chamber with ultra-violet light.
Notwithstanding any other forms that may fall within its scope one preferred form of the invention will now be described by way of example only with reference to the accompanying drawings in which:
FIG. 1 is a horizontal cross-section of water purifying apparatus according to the invention,
FIG. 2 is a vertical cross-section on the line A--A of FIG. 1, and
FIG. 3 is an elevation of the water purifying apparatus viewed at right angles to FIG. 2.
In the preferred form of the invention water purifying apparatus which is particularly designed for purifying water used in swimming pools but which may of course be used in other water purifying applications is constructed as follows:
The apparatus comprises an outer chamber 1 which is a cylindrical tube connecting end flanges 2 and 3. The apparatus further comprises an inner chamber 4 which may be a transparent cylinder coaxially located within the outer chamber 1 but which is preferably the casing of an ultra-violet light generating tube having electrical terminals 5 at either end thereof. Where the inner chamber is a transparent cylinder the ultra-violet light generating tube is located within the cylinder. The annular space 7 between the inner and outer chambers is divided into a plurality of longitudinal channels by way of longitudinal fins 8 extending between the inner and outer chambers and forming longitudinal channels 9, 9A, 10 and 10A communicating with one another through the space 6 at the bottom of the chamber 1. The fins are supported and spaced as shown by fin spacers 8A into space 6, upwardly through channels 9A, downwardly through channels 10.
The apparatus is provided with an inlet pipe 11 into the outer chamber at the upper end adjacent the mounting flange 2 and an outlet pipe 12 located diametrically opposite the inlet pipe 11. In this manner water from a pool or other source may be pumped in through the inlet pipe 11 whereupon it is directed downwardly between the inner and outer chambers through channel 9 into space 6, upwardly through channels 9A, downwardly through channels 10 and upwardly through the channel 10A and outwardly through the outlet pipe 12.
The inner chamber is formed by the outer casing of an ultra-violet light generating tube 13 which extends from the end flange 2 to the end flange 3. The tube is mounted in rubber O-ring seals 14 and provided with suitable end caps and mounts 15 to provide electricity to the tube.
In the preferred form of the invention the inner surface of the outer chamber 1 is reflectori
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patent: 4267455 (1981-05-01), Keller
patent: 4273660 (1981-06-01), Beitzel
patent: 4278549 (1981-07-01), Abrams et al.
patent: 4296066 (1981-10-01), Schenck
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