A method and system for self-calibration control of ion yield drift of a negative ion purifier

By constructing a thermodynamic model to decouple the conductivity changes caused by water evaporation and pollutant intrusion, and combining it with the mechanical fatigue benchmark of the air pump, constant control of ion production of the negative ion purifier is achieved throughout its entire life cycle. This solves the problem of control distortion in existing technologies and ensures the safe and reliable operation of the equipment.

CN121993875BActive Publication Date: 2026-06-23XIAN NEW HOPE MEDICAL EQUIP CO LTD
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Patent Information

Application Number
CN202610458570.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-04-09
Publication Date
2026-06-23
Estimated Expiration
2046-04-09

AI Technical Summary

Technical Problem

Existing negative ion air purifiers have difficulty distinguishing between the increase in conductivity caused by natural evaporation of water and the increase in conductivity caused by the intrusion of external pollutants during long-term operation, resulting in control distortion and problems such as overcompensation or dry burning at low water levels.

Method used

A thermodynamic evaporation model based on environmental parameters is constructed. By calculating the saturated vapor pressure difference at the water-air interface and the theoretical water evaporation rate, the evaporation concentration and water pollution components in the actual conductivity signal are decoupled. The mechanical fatigue benchmark is determined by combining the cumulative operating time of the air pump, and the total performance drift is generated to achieve accurate compensation and operating envelope clamping.

Benefits of technology

It effectively solves the problem of control distortion, ensures that the ion output of the negative ion purifier remains constant throughout its entire life cycle, avoids the increase of ineffective energy consumption and the risk of dry burning at low water levels, and achieves coordinated control of precise self-calibration and intrinsic safety.

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Abstract

The application relates to the technical field of air purification, and discloses a negative ion purifier ion yield drift self-calibration control method and system, which comprises the following steps: obtaining the cumulative running time of an air pump to determine a mechanical fatigue reference drift amount; constructing a theoretical evaporation model to solve a theoretical water evaporation rate and a theoretical conductivity reference slope; comparing the actual conductivity change slope to obtain a deviation index, on the basis of which water quality state binary determination is performed, and a water quality damping drift amount is generated; superimposing the mechanical fatigue reference drift amount and the water quality damping drift amount to obtain a total performance drift amount, generating a target driving instruction, and performing clamping output in combination with a running envelope; the application effectively eliminates the conductivity false high interference caused by natural evaporation through a thermodynamic model, realizes layered and accurate compensation of hardware aging and water pollution, maintains the constant ion yield, and avoids the overcompensation and air pump dry burning risk caused by misjudgment.
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