Device for sterilizing swimming-pool water

Claim 1

Device for sterilizing swimming-pool water, particularly of small-volume pools, said device being provided in the water regenerating flow circuit and comprising an ozonizer, in which the ozonizer is so arranged as to supply the ozone directly into the water inside a water-ozone contacting chamber without venting the ozone to the atmosphere, the ozonizer being mounted inside the water-ozone contacting chamber, which is sealed-off and comprises an inlet and an outlet for the water to be sterilized, means being provided in said chamber for insuring the water-ozone contacting, the water-ozone contacting chamber being of the constant level type, the ozonizer being located above the water level and so arranged as to supply the ozone through a pipe and through a diffuser dipping in the water, at the bottom of the contacting chamber, the water inlet to said chamber being located above the water level in such a way that the water to be sterilized runs into that tank portion located above the water level and containing gas escaping from the water, the water outlet being located below the water level adjacent the contacting chamber bottom, and the chamber having a water-outlet pipe, the outlet of which lies at the contacting chamber bottom, which is so arranged in said contacting chamber as to extend above the chamber water level to the inlet level of the water to be sterilized, said pipe being surrounded over a portion of the length thereof lying above said water level, by two co-axial pipe sections staggered relative to one another, a first pipe section being connected to the chamber walls below the inlet for the water to be sterilized, in such a way that said water to be sterilized flows between said outlet pipe and said first pipe section, a second pipe section surrounding the first section and being staggered relative thereto in such a way that the water flow between the outlet pipe and the first pipe section causes an underpressure between both pipe sections so that the gas present inside the contacting chamber above the water level be forced between the pipe sections and contacted with the water to be sterilized as soon as it enters the contacting chamber, said water-outlet pipe comprising at the water level inside the contacting chamber, at least one opening, the said means for insuring the water ozone contacting including means provided in said pipe to cause a turbulence in the water flow at the level of said opening so as to feed therethrough in the pipe gas present above the water level inside the contacting chamber, said last-named means comprising, a baffle on said water-outlet pipe above said opening, said baffle being so arranged as to cause turbulences in the water flowing between said pipe and said first pipe section to insure a water-gas mixing and avoid water entering the water-outlet pipe through said opening.