Method for automatic dispensing of hydrochlorine in swimming pool water

• US 5,326,481 A
• Filed: 09/11/1992
• Issued: 07/05/1994
• Est. Priority Date: 09/11/1992
• Status: Expired due to Term

• Current Assignee: William J. Barkhurst
• Original Assignee: Alwerud S. Tomas
• Inventors: Alwerud, S. Tomas
• Primary Examiner(s): McCarthy, Neil
• Application Number:
  US07/943,682
• Time in Patent Office: 662 Days
• Field of Search: 210/96.1, 210/169, 210/754, 210/739, 210/742, 210/138, 210/139, 210/143, 210/141, 210/142, 422/37, 422/108, 422/116, 364/496, 364/571.03, 364/571.04, 364/571.01, 364/571.02
• US Class Current: 210/742
• CPC Class Codes: C02F 1/686 Devices for dosing liquid additives
• CPC Class Codes: C02F 1/76 with halogens or compounds of halogens C02F1/4674 takes precedence
• CPC Class Codes: C02F 2103/42 from bathing facilities, e.g. swimming pools

Abstract

A method for automatic dispensing of chlorine in swimming pools where a computer measures the pool water temperature, and an empirically derived table is used for the computer to select a temperature related volume unit figure for chlorine dispensing, which volume unit figure is adjusted according to a first step calibration of the chlorine dispensing device and a second step calibration according to the water volume of the existing pool.

Claims

1. A method for controlling the addition of chlorine to water in an existing swimming pool comprising:

(a) calibrating a chlorine dispensing device to determine the volume of chlorine dispensed per unit of time;

(b) measuring the temperature of the pool water;

(c) determining, based on said measured temperature, a hypothetical amount of chlorine necessary to be dispensed into a hypothetical pool having a fixed volume to maintain the level of chlorine in the water of said hypothetical pool within the range of from about 1.0 to about 2.0 ppm at said measured temperature;

(d) determining an actual amount of chlorine to be dispensed into said existing pool based on said hypothetical amount of chlorine determined in step (c) above by multiplying said hypothetical amount by a quota number which consists essentially of the ratio of the actual volume of the existing pool to the fixed volume of the hypothetical pool, thereby determining an actual amount of chlorine effective to maintain the chlorine level in the water of said existing pool at a desired level within the range of from about 1.0 to about 2.0 ppm;

(e) allowing the pump, based on said calibrated value of volume of chlorine dispensed per unit of time, to run for a length of time to dispense said actual amount of chlorine determined in step (d) above into the water of said existing pool;

(f) measuring the chlorine level of the water in said existing pool after dispensing said actual amount of chlorine and adjusting said quota number higher or lower in proportion to the ratio of the desired level of chlorine to the measured level of chlorine, and accordingly adjusting the dispensing time of the pump based on said ratio;

wherein said hypothetical amount of chlorine based on temperature, said calibrated volume of chlorine dispensed per unit of time, and said quota number are store in computer memory and said temperature is automatically measured and inputted into said computer and wherein said computer determines the amount of time for which the calibrated pump is to be run to dispense a desired amount of chlorine.