Filter screen life prediction method, device and equipment of purification equipment and air purifier

By monitoring the fan speed and current of the purification equipment and combining historical data, the dynamic load information and attenuation rate of the filter are calculated, solving the problem of the accuracy of filter life monitoring and realizing efficient and low-cost filter life prediction.

CN121520688BActive Publication Date: 2026-07-21GREE ELECTRIC APPLIANCE INC OF ZHUHAI
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Patent Information

Application Number
CN202511980851.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-25
Publication Date
2026-07-21
Estimated Expiration
2045-12-25

AI Technical Summary

Technical Problem

Existing methods for monitoring filter life rely on operating time or particulate matter concentration, which can lead to significant discrepancies between the monitoring results and actual conditions or the risk of misjudgment. These methods cannot accurately reflect the degree of filter clogging and its lifespan.

Method used

By monitoring the fan speed and current operating current of the fan motor in the purification equipment, the dynamic load information of the fan is calculated. Combined with the historical decay rate of the filter, the decay rate of the filter at the current life prediction time is determined, and life prediction is then performed. No additional sensors are required to use the fan operation information.

Benefits of technology

It improves the accuracy of filter life prediction, reduces prediction costs, and does not require additional sensors for information collection, accurately reflecting the degree of filter clogging and remaining life.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to a filter screen life prediction method, device and equipment of a purification device and an air purifier. The method comprises the following steps: acquiring a fan rotating speed and a current operating current of a fan motor when the purification device is running; determining dynamic load information of the fan according to a current deviation degree of a reference operating current matched with the fan rotating speed and the current operating current; the dynamic load information is used for reflecting a clogging degree of a filter screen in the purification device; determining a filter screen attenuation rate of the filter screen at a current life prediction moment based on a historical attenuation rate of the filter screen and the dynamic load information; and performing life prediction on the filter screen according to a preset life threshold of the filter screen, the dynamic load information and the filter screen attenuation rate, so as to obtain a life prediction result of the filter screen. The method can improve the life prediction accuracy of the filter screen.
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Citation Information

Patent Citations

  • Air conditioner filter screen washing judging method

    CN108826581A

  • Method for monitoring service life of filter screen in air purifier and related device

    CN109991147A

  • Filter screen life calculating method and device and purifying equipment

    CN111780345A

  • Method and system for prompting replacement of efficient filter screen of air purifier

    CN120576444A