Method and an apparatus for cleaning water in a swimming pool

Claim 1

A method of cleaning chlorinated water in a swimming pool by circulating the water through a container, in which it is treated by ultraviolet radiation, characterized in that the water in the container is carried through a plurality of flow chambers connected in series in such a manner that in the first chamber the water is carried through a plurality of heating bodies located transverse to the flow, and in a plurality of succeeding flow chambers said water is treated by a plurality of ultraviolet radiation lamps with a predetermined radiation of light with the wave length λ>300 nm.

Claim 2

A method of cleaning chlorinated water in a swimming pool by circulating the water through a container, in which it is treated by ultraviolet radiation, characterized in that the water in the container is carried through a plurality of flow chambers connected in series in such a manner that in the first chamber the water is carried through a plurality of heating bodies located transverse to the flow, and in a plurality of succeeding flow chambers said water is treated by a plurality of ultraviolet radiation lamps with a predetermined radiation of light with the wave length λ>300 nm.

Claim 4

An apparatus for cleaning chlorinated water in a swimming pool and comprising a container (1), the inlet (2) and outlet (3) of which are connected with the pool in such a manner that the water from said pool may be circulated through the container, in which it is treated by ultraviolet radiation, characterized in that the container (1) between the inlet (2) and the outlet (3) is divided into a plurality of flow chambers (5, 6) connected in series, and that the chamber (5) adjacent the inlet comprises a plurality of bar-shaped, optionally burnished heating bodies (7) located transverse to the flow direction, and that at least one of the chambers (6) succeeding in the flow path of the water comprises a plurality of ultraviolet radiation lamps (8) with a predetermined radiation of light with the wave length λ>300 nm and located in such a manner that they may radiate intensively the passing water.

Claim 5

An apparatus for cleaning chlorinated water in a swimming pool and comprising a container (1), the inlet (2) and outlet (3) of which are connected with the pool in such a manner that the water from said pool may be circulated through the container, in which it is treated by ultraviolet radiation, characterized in that the container (1) between the inlet (2) and the outlet (3) is divided into a plurality of flow chambers (5, 6) connected in series, and that the chamber (5) adjacent the inlet comprises a plurality of bar-shaped, optionally burnished heating bodies (7) located transverse to the flow direction, and that at least one of the chambers (6) succeeding in the flow path of the water comprises a plurality of ultraviolet radiation lamps (8) with a predetermined radiation of light with the wave length λ>300 nm and located in such a manner that they may radiate intensively the passing water.

Claim 9

An apparatus as claimed in any one of claims 4 to 6, characterized in that the ultraviolet radiation lamps (8) with a predetermined radiation of light with the wave length λ>300 nm are tubular and located in the flow chambers (6) transverse to the flow direction of the water, and that the ultraviolet radiation lamps (14) with a predetermined radiation of light with the wave length λ<300 nm are tubular and located in the flow chamber (13) in the flow direction of the water.

Claim 10

An apparatus as claimed in any one of claims 4 to 6, characterized in that the inner walls of the flow chambers (5, 6, 13) are reflecting.

Claim 11

An apparatus as claimed in any one of claims 4 to 6, characterized in that each bar-shaped heating body (7) comprises a centrally located electric heating element surrounded by an outer tube containing a heat transfer oil.

Claim 12

An apparatus as claimed in any one of claims 4 to 6, characterized in that the bar-shaped heating bodies (7) are glass-tube resistors radiating infrared light in the radiation range λ>700 nm with a predetermined radiation of light.

Claim 13

A method of cleaning chlorinated water in a swimming pool comprising withdrawing a stream of water from the swimming pool and passing the stream through a plurality of flow chambers connected in series, the water in the first flow chamber passing transversely across a plurality of smooth-surfaced elongated heating bodies which are at a temperature such that impurities in the water form a coating on the surfaces of the heating bodies, treating the water in a plurality of succeeding flow chambers by a plurality of ultraviolet radiation lamps emitting a predetermined radiation of light with the wave length greater than 300 nm to thereby accelerate the germicidal effect of the chlorine, treating the water passing through a further succeeding flow chamber by ultraviolet radiation lamps with a predetermined radiation of light with the wave length less than 300 nm to thereby kill bacteria which are resistant to chlorine, returning the water from the last flow chamber to the swimming pool, and while periodically interrupting the flow of swimming pool water to the flow chambers removing the coating from the heating bodies and passing the coating to waste.

Claim 14

A method of cleaning chlorinated water in a swimming pool comprising withdrawing a stream of water from the swimming pool and passing the stream through a plurality of flow chambers connected in series, the water in the first flow chamber passing transversely across a plurality of smooth-surfaced elongated heating bodies which are at a temperature such that impurities in the water form a coating on the surfaces of the heating bodies, treating the water in a plurality of succeeding flow chambers by a plurality of ultraviolet radiation lamps emitting a predetermined radiation of light with the wave length greater than 300 nm to thereby accelerate the germicidal effect of the chlorine, treating the water passing through a further succeeding flow chamber by ultraviolet radiation lamps with a predetermined radiation of light with the wave length less than 300 nm to thereby kill bacteria which are resistant to chlorine, returning the water from the last flow chamber to the swimming pool, and while periodically interrupting the flow of swimming pool water to the flow chambers removing the coating from the heating bodies and passing the coating to waste.