Patent ID: 8470170
Filing Date: 2013-06-25
Classification: C02F

Abstract:
1. An apparatus for supplying ozone-aerated and filtered fluid to a main fluid reservoir, comprising: an auxiliary fluid reservoir for filtering and ozone-aerating fluid therein positioned adjacent to and outside of the main fluid reservoir; a first conduit for enabling ozone-aerated and filtered fluid in the auxiliary reservoir to flow into the main reservoir by gravity when the fluid level in the auxiliary fluid reservoir is higher than the fluid level in the main fluid reservoir; a second fluid conduit for enabling fluid to flow from the main fluid reservoir to the auxiliary fluid reservoir; a filtration device comprising filtering surfaces housed within the auxiliary fluid reservoir, wherein fluid in the auxiliary fluid reservoir is enabled to pass through the filtering surfaces before entering said first conduit; a lift tube having an upper end and a lower end, said lift tube upper end open within the auxiliary fluid reservoir, said lift tube extending below the auxiliary fluid reservoir a predetermined length and having its lower end connected to the end of said second fluid conduit opposite to the end of said second fluid conduit connected to the main fluid reservoir, such that fluid from the main fluid reservoir is fed by gravity into said lift tube and up into said auxiliary fluid reservoir via said second fluid conduit; and a diffuser positioned inside said lift tube lower end for injecting ozonated air into the fluid in the lift tube; and such that, when ozonated air is injected into said lift tube by the diffuser, the expansion of the ozonated air as it bubbles up said lift tube causes the fluid in said lift tube to flow up the lift tube and into the auxiliary fluid reservoir, said fluid in contact in said lift tube with the ozonated air being injected by the diffuser, to cause the level of fluid in the auxiliary fluid reservoir to be higher than the level of fluid in the main fluid reservoir and thereby to cause ozone-aerated fluid to flow through the filtration device and into the first fluid conduit from the auxiliary fluid reservoir and into the main fluid reservoir, at the same time causing fluid to be drawn through said second fluid conduit from the main fluid reservoir and into said lift tube.