Water purifier filter element replacement grading reminding device and method

A reminder device and water purifier technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, filtration treatment, etc., can solve problems such as untimely replacement, early replacement of filter elements, easy misjudgment, etc., and achieve flexible judgment Effective, intuitive and accurate detection, accurate judgment process

Active Publication Date: 2020-05-26
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the water purifiers in the market calculate the life of the filter elements based on the cumulative use time, but the water quality in each region is different, and the service life of the filter elements will also change greatly, so it is easy to cause the filter element to be replaced in advance or not in time
Patent application CN109851079A discloses a water purifier capable of intelligently monitoring the life of the filter element. The water purifier is equipped with a water pressure sensor at the water inlet pipe to judge the clogging of the filter element through the pressure difference, but it can only judge single-stage clogging. If the filter element of the first stage is blocked at the same time, it cannot be judged and reminded at the same time in multiple stages, and misjudgment is also prone to occur when the water inlet pressure is unstable; patent application CN108479169A discloses a water purifier filter element life monitoring system and monitoring method. TDS detection sensors are installed at the water inlet and water outlet respectively, and the desalination rate is judged by setting different TDS value intervals. If the RO reverse osmosis membrane filter element or ultra-membrane filter element is normal, the TDS detection result is normal, but other filter elements cannot be blocked. judge

Method used

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  • Water purifier filter element replacement grading reminding device and method
  • Water purifier filter element replacement grading reminding device and method
  • Water purifier filter element replacement grading reminding device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: Use the color recognition module 5 to remind the user to replace the primary PP cotton filter element

[0044] Set the initial RGB contrast value to R 0 =205,G 0 =133,B 0 =63, the maximum color difference value M=50, carry out 3 tests, the value measured for the first time is R 1 =218,G 1 =165,B 1 =32, the second measured value is R 1 =205,G 1 =102,B 1 =29, the third measured value is R 1 =238, G 1 =118,B 1 =33, the average color difference value of the three tests is about 46.5, and 46.5<50, it is determined that the first-grade PP cotton filter element needs to be replaced.

[0045] When the pp cotton filter element is replaced, the color recognition module 5 can be unscrewed to clean the detection end, so as to ensure the accuracy of sensor detection in each use cycle.

Embodiment 2

[0046] Example 2: Use the maximum usage time to remind the user to replace the secondary carbon rod filter element and the fourth-stage activated carbon filter element

[0047] The water quality of tap water in urban communities is generally good, and the TDS of the water is generally around 200ppm. If the user does not have high requirements, set it to the maximum usage time; if the water quality in rural areas is poor, set it to the maximum usage time multiplied by 80% , when the actual use time of the water purifier exceeds the set maximum use time, the user will be reminded to replace the filter element.

Embodiment 3

[0048] Example 3: Using the temperature-compensated TDS value and desalination rate to judge and remind the user to replace the three-stage RO reverse osmosis membrane filter element

[0049] In winter, the tap water temperature is about 5°C, when the first probe 8 of the TDS detection module 17 detects the value P 1 ∈[0, 300], the detection value P of the second probe 9 2 =30, then P 补 =42,P 补 2 =36, then P 补 =50.4,P 补 >50, it reminds the user that the filter element needs to be replaced.

[0050] When the first probe 8 of the TDS detection module 17 detects the value P 1 ∈(300, 1000], the detection value P of the second probe 9 2 =60, then P 补 =84,P 补 2 =75, then P 补 =105,P 补 >100, remind the user that the filter element needs to be replaced.

[0051] The water quality in the local area is very poor, and the first probe 8 of the TDS detection module 17 detects a value of P 1 ∈(1000, +∞), if P 1 =2000, the detection value P of the second probe 9 2 =120, then P=0...

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Abstract

The invention discloses a water purifier filter element replacement grading reminding device, which comprises a water purifier body and a detection device, wherein the water purifier body comprises afiltering device; the filtering device comprises four stages of filter elements; the detection device comprises a color recognition module, a TDS detection module, a temperature detection module, a water flow sensor and a single chip microcomputer module; and the color recognition module, the TDS detection module, the temperature detection module and the water flow sensor are connected with the single chip microcomputer module. The invention also discloses a water purifier filter element replacement grading reminding method. The method comprises the following steps of: reminding a user to replace a first grade of pp cotton filter element by utilizing the color recognition module, and reminding the user to replace the three-stage RO membrane filter element by using the TDS value after temperature compensation and the desalination rate, or reminding the user to replace the three-stage RO membrane filter element by using the water flow after temperature compensation. Different indexes ofdifferent filter elements are detected, and the effects of self-inspection at each stage, judgment at each stage and graded reminding are realized.

Description

technical field [0001] The invention relates to the field of water purifier devices, in particular to a water purifier filter element replacement grading reminding device and method. Background technique [0002] The water purifier has gradually become a commonly used household appliance. Its core part is the filter elements of all levels. The filter elements of each level have their own service life. Secondary pollution. [0003] At present, the water purifiers in the market calculate the life of the filter element based on the cumulative use time, but the water quality in each region is different, and the service life of the filter element will also change greatly, so it is easy to cause the filter element to be replaced in advance or not in time. Patent application CN109851079A discloses a water purifier capable of intelligently monitoring the life of the filter element. The water purifier is equipped with a water pressure sensor at the water inlet pipe to judge the clog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02
CPCC02F1/001C02F1/441C02F2209/445C02F2303/14
Inventor 金肃钦陈海秀王鹏许炜华
Owner NANJING UNIV OF INFORMATION SCI & TECH
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