# US 5,341,655 A · Salt free evaporative air conditioning > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,341,655 A - Document ID: US5341655A - Status: Granted - Kind: A - Application number: 07/966,814 - Filed: 1992-10-26 - Granted: 1994-08-30 - Earliest claimed: 1992-10-26 - Inventors: Abdul A. A. Al-Saleh - Web page: https://patentgrep.com/patent/US5341655A ## CPC - F24F 5/0035: {using evaporation} - F24F 2006/006: {with water treatment} - Y02B 30/54: Free-cooling systems - Y10S 261/46: Residue prevention in humidifiers and air conditioners - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract An air conditioner is provided that self-disposes of salts that accumulate in increasing concentration inside the air conditioner cooler. Such salts result from continuous evaporation of water that cools air passing through water evaporation mats located within the cooler. The air conditioner includes a separate basin for drawing salty water from the cooler reservoir. Drawn water is evaporated from the basin to concentrate the salt for disposal. The evaporation basin is designed so that the evaporation rate therein is substantially equal to a predetermined ideal quantity of salt water to be disposed of in order to maintain the highest efficiency in performance of the cooler. As such, the evaporative air conditioner system does not consume a larger quantity of water than that consumed by ordinary coolers that require regular cleaning and maintenance. ## Claims ### Claim 1 An evaporative air conditioner of the type including an evaporative cooler and a cooler reservoir, the improvement comprising: a. means for disposing of salty water which normally accumulates in increasing concentration within the cooler reservoir, said disposal means including a drying basin in a location remote from the cooler reservoir, the drying basin being exposed to sun and air so that salty water from the cooler reservoir will evaporate therein; and b. flow control means for periodically refilling the drying basin with salty water from the cooler reservoir when the salty water from a previous filling has substantially evaporated. ### Claim 2 (depends on 1) The evaporative air conditioner of claim 1 wherein the drying basin, when full of salty water from the cooler reservoir has a center of gravity which is offset from its center of gravity when not filled, the drying basin being hingedly mounted along an axis which is located with respect to the drying basin's respective centers of gravity so that the drying basin when full is rotated about the axis into a full position, and wherein said flow control means includes a shut-off valve which closes when the drying basin tips into its full position. ### Claim 3 (depends on 2) The evaporative air conditioner of claim 2, further comprising a frame enclosing the air conditioner and the drying basin, and means for releasably mounting said drying basin on said frame so that the drying basin can be disengaged periodically for removal of accumulated salts. ### Claim 4 (depends on 3) The evaporative air conditioner of claim 3, wherein the drying basin further comprises wind driven fin means for eliminating a salt crust that would otherwise form on the surface of the salty water contained within the drying basin. ### Claim 5 (depends on 1) The evaporative air conditioner of claim 1, wherein the flow control means includes a shut-off valve for interrupting the flow of salty water from the cooler reservoir to the drying basin and further includes level control means for closing the shut-off valve when the drying basin is full and for closing the shut-off valve when there is a substantial change in the salty water level within the drying basin. ### Claim 6 (depends on 1) The evaporative air conditioner of claim 1, wherein the flow controller comprises a small pump for pumping salty water from the cooler reservoir to the drying basin and a floating electric switch for operating the pump in response to the level of salty water in the drying basin. ### Claim 7 (depends on 1) The evaporative air conditioner of claim 1, wherein the drying basin is equipped with a mobile lid for controlling the rate of evaporation from the drying basin by covering some area of the drying basin in inverse relation to the operation hours of the evaporative air conditioner. ### Claim 8 (depends on 3) The evaporative air conditioner of claim 3, further comprising means for adjusting the location of the mount in relation to the center of gravity of the drying basin. ### Claim 9 (depends on 1) The evaporative air conditioner of claim 1, the improvement further comprising a replacement cooler reservoir of smaller capacity than the existing reservoir for reducing water consumption during the salt disposal operation, and wherein the drying basin is sized and the refilling frequent enough to increase the salt dilution within the cooler reservoir to the extent of tap water. ### Claim 10 A salt removal system for retrofit on an evaporative air conditioner of the type including an evaporative cooler and a cooler reservoir, the salt removal system comprising: a. means for disposing of salty water which normally accumulates in increasing concentration within the cooler reservoir, said disposal means including a drying basin in a location remote from the cooler reservoir, the drying basin being exposed to sun and air so that salty water from the cooler reservoir will evaporate therein; and b. flow control means for periodically refilling the drying basin with salty water from the cooler reservoir when the salty water from a previous filling has substantially evaporated. ### Claim 11 (depends on 10) The salt removal system of claim 10, wherein the drying basin, when full of salty water from the cooler reservoir has a center of gravity which is offset from its center of gravity when not filled, the drying basin being hingedly mounted along an axis which is located with respect to the drying basin's respective centers of gravity so that the drying basin when full is rotated about the axis into a full position, and wherein said flow control means includes a shut-off valve which closes when the drying basin tips into its full position. ### Claim 12 (depends on 11) The salt removal system of claim 11, further comprising a frame enclosing the the drying basin, and means for releasably mounting said drying basin on said frame so that the drying basin can be disengaged periodically for removal of accumulated salts. ### Claim 13 (depends on 12) The salt removal system of claim 12, wherein the drying basin further comprises wind driven fin means for eliminating a salt crust that would otherwise form on the surface of the salty water contained within the drying basin. ### Claim 14 (depends on 10) The salt removal system of claim 10, wherein the flow control means includes a shut-off valve for interrupting the flow of salty water from the cooler reservoir to the drying basin and further includes level control means for closing the shut-off valve when the drying basin is full and for closing the shut-off valve when there is a substantial change in the salty water level within the drying basin. ### Claim 15 (depends on 10) The salt removal system of claim 10, wherein the flow controller comprises a small pump for pumping salty water from the cooler reservoir to the drying basin and a floating electric switch for operating the pump in response to the level of salty water in the drying basin. ### Claim 16 (depends on 10) The salt removal system of claim 10, wherein the drying basin is equipped with a mobile lid for controlling the rate of evaporation from the drying basin by covering some area of the drying basin in inverse relation to the operation hours of the evaporative air conditioner. ### Claim 17 (depends on 12) The salt removal system of claim 12, further comprising means for adjusting the location of the mount in relation to the center of gravity of the drying basin. ### Claim 18 (depends on 10) The salt removal system of claim 10, the improvement further comprising a replacement cooler reservoir of smaller capacity than the existing reservoir for reducing water consumption during the salt disposal operation, and wherein the drying basin is sized and the refilling frequent enough to increase the salt dilution within the cooler reservoir to the extent of tap water.