A method of detecting the service lifetime of a filter screen of a vehicle-loaded purifier

Abstract

A method of detecting the service lifetime of a filter screen of a vehicle-loaded purifier is provided. The method includes a dust adsorption service lifetime detecting step including S11) collecting calibration date for the dust adsorption service lifetime of the filter screen and forming a database; S12) detecting, in real time, an air pressure value of an interlayer between the filter screen and a draught fan, calculating power, comparing an air pressure value, in the database, corresponding to the calculated power with the detected air pressure value, performing a next step if a deviation is within a preset firs threshold, and otherwise, repeating the S12) step; and S13) performing optical illuminance testing, detecting a gray-scale value of the surface of an HEPA layer of the filter screen, determining a first preset range where the gray-scale value is in, and giving an alarm when the gray-scale value reaches a first dangerous range. A change of air pressures before and after the filter screen, the power of the draught fan, the gray-scale value of the surface of the filter screen, and other parameters are combined to comprehensively determine the service lifetime stage of the filter screen, and therefore a filter screen service lifetime prompting function of the purifier is more precise, the method can adapt to conversion of different environments and can effectively estimate the service lifetime of the filter screen, data are precise and reliable, and secondary pollution in vehicles is avoided.

Description

technical field [0001] The invention relates to the field of filter testing, in particular to a method for detecting the life of a filter screen of a vehicle-mounted purifier. Background technique [0002] Most of the current vehicle-mounted air purifiers have an automatic reminder function for filter replacement. The automatic reminder function for the life detection logic of the filter is mostly based on the cumulative power-on time reaching a certain period of time to remind the replacement, such as setting the cumulative use of 360 hours That is to remind you to replace the filter, but the automatic reminder function ignores many factors that affect the life of the filter, causing consumers to question the product’s automatic filter replacement reminder function. For example, if the purifier is used in the smog weather in northern China, its air quality As a result, the filter screen in the purifier is scrapped in a short period of time and loses the purification effect,...

AI Technical Summary

Problems solved by technology

[0002] Most of the current vehicle-mounted air purifiers have an automatic reminder function for filter replacement. The automatic reminder function for the life detection logic of the filter is mostly based on the cumulative power-on time reaching a certain period of time to remind the replacement, such as setting the cumulative use of 360 hours That is to remind you to replace the filter, but the automatic reminder function ignores many factors that affect the life of the filter, causing consumers to question the product’s automatic filter replacement reminder function. For example, if the purifier is used in the smog weather in northern China, its air quality As a result, the filter screen in the purifier is scrapped in a short period of time and loses the purification effect, but the system does not prompt in time, and continuing to use the scrapped filter screen will easily cause secondary pollution in the car; while the car air purifier can not only remove dust It also has the function of removing harmful gases. Generally, the interior space of a car is about 3 cubic meters, and the filter screen of the purifier is relatively small. At present, most manufacturers use composite filter screens, which can not only remove dust, but also absorb dust. Harmful gas, but the life of the filter is only replaced by the accumulated startup time or dust-related indicators, without considering the life of adsorbing harmful gas, which is obviously inaccurate

[0003] Therefore, in the prior art, there is inaccurate automatic detection of the filter life of the vehicle-mounted purifier, and the vehicle-mounted purifier does not carry out targeted detection of the adsorption life of harmful gases in the filter, so that consumers cannot effectively evaluate the state of the filter, resulting in filtration The filter is not maximized and the filter cannot be replaced in time, causing secondary pollution

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