Softening device

The water softening device efficiently regenerates ion exchange resins by using a specialized chamber configuration and electrode positioning to overcome the inefficiencies of re-adsorption, ensuring consistent soft water production without salt replenishment.

JP2026100162APending Publication Date: 2026-06-19PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Filing Date
2024-12-09
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing water softening technologies face inefficiencies in resin regeneration due to re-adsorption of hardness ions onto ion exchange resins, inhibiting the regeneration process.

Method used

A water softening device with a specific configuration that includes a casing containing a water softening chamber with weakly acidic cation exchange resin, a neutralization chamber with weakly basic anion exchange resin, and electrodes for regeneration, utilizing a diaphragm to separate the chambers and control the flow of water, along with strategically positioned electrodes and resins to enhance regeneration efficiency.

Benefits of technology

The device efficiently regenerates ion exchange resins, ensuring consistent production of soft water without the need for salt replenishment, addressing the inefficiencies of previous technologies.

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Abstract

To provide a water softening device that enables efficient regeneration of ion exchange resins. [Solution] The water softening device comprises a water softening chamber 209 that generates softened water, a neutralization chamber 210 that neutralizes the softened water, an inner circumferential diaphragm 215, a water intake section 203 that introduces raw water, a water supply section 204 that supplies the neutralized softened water to the outside, a first electrode 201, and a second electrode 202. Furthermore, the water softening chamber 209, the inner circumferential diaphragm 215, the neutralization chamber 210, and the water supply section 204 are arranged in the order of the water intake section 203 having a central axis perpendicular to the bottom surface of the water softening chamber 209, and outward in the direction of the outer circumference of a circle centered on the central axis. The weakly acidic cation exchange resin 213 includes a first weakly acidic cation exchange resin 213a and a second weakly acidic cation exchange resin 213b that has a higher acidity dissociation constant than the first weakly acidic cation exchange resin 213a. The first weakly acidic cation exchange resin 213a is located closer to the first electrode 201 than the second weakly acidic cation exchange resin 213b.
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