Water treatment system for swimming pools and potable water

A device for treating a body of water, in a swimming pool or spa, which is recirculated in a treatment path external of the pool by a pump, comprising:

• a casing operatively connected to said pump and having an inlet and an outlet and a treatment flow path for water flowing between said inlet and outlet;
• said casing being a stainless steel cylinder having end plates with lamp-receiving apertures therein secured to opposite ends of said cylinder,
• an ultraviolet germicidal lamp means having a generally tubular surface positioned in said treatment flow path;
• an ozone producing ultraviolet lamp means having a generally tubular surface positioned in said treatment flow path and operative to convert dissolved oxygen in the water into ozone;
• said lamp means extending through said apertures and having electrical terminals at the ends thereof located outside said cylinder,
• seal means associated with said apertures and including a compressible gland of a material which is resistant to degradation by UV radiation, and
• compression means in said seal means compressing said gland against said tubular surface of said lamp means and against the portion of said end plates defining said apertures to support said lamp means sealed to and electrically insulated from said cylinder.
• an elongated pipe extending from said inlet and defining the flow path;
• a tee fitting having one of its ends connected to said pipe and having its branch extending perpendicular to said pipe and providing said outlet;
• means extending from the other end of said tee fitting and providing a chamber,
• bulkhead means separating said chamber from the remainder of said tee fitting,
• said ultraviolet lamp means extending from said bulkhead toward said inlet in parallel relation to each other,
• a pair of copper electrodes positioned spaced apart within the treatment path;
• means supported adjacent said casing for powering said ultraviolet lamp means;
• means providing a source of electrical power to said powering means and to said electrodes;
• and
• control means limiting the current applied to said electrodes to hold the copper ion concentration in the water within acceptable limits to maintain control of algae growth in the body of water.

In a device for use in treating water flowing in a treatment path, the device comprising:

• a germicidal ultraviolet lamp having electrical terminals for the supply of electrical energy thereto and having a surface through which UV is radiated;
• an ozone producing ultraviolet lamp having electrical terminals for the supply of electrical energy thereto and having a surface through which UV is radiated at a frequency to convert oxygen into ozone;
• a casing surrounding said lamps and defining therewith a flow path of annular cross-section for water to be treated, said casing having an extending body portion, an inlet portion including an inlet opening and an outlet portion including an outlet opening such that water to be treated flows along and in direct contact with said surfaces of said lamps;
• said casing being constructed of a material resistant to UV degradation;
• said flow path within said casing and along the exteriors of said lamps having sufficient capacity to pass at least 10 gallons of water per minute;
• a pair of copper electrodes supported in the water flow path through said casing and providing a source of algae controlling copper ions for treating the water to inhibit growth of algae therein;
• ultrasonic transducer means mounted in said casing to direct ultrasonic energy at said surfaces of said lamps to loosen deposited material from said surfaces for entrainment into the flow of water, whereby said lamp surfaces are cleaned to minimize impedance of UV radiation therefrom due to such deposited material.