CN107543906B - Self-correcting method for water purifier sensor - Google Patents
Self-correcting method for water purifier sensor Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 252
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012937 correction Methods 0.000 claims abstract description 27
- 238000011010 flushing procedure Methods 0.000 claims abstract description 26
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 21
- 238000005406 washing Methods 0.000 claims description 4
- 238000012935 Averaging Methods 0.000 claims description 2
- 238000012887 quadratic function Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000011045 prefiltration Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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Abstract
The invention discloses a self-correcting method for a water purifier sensor, belongs to the field of water purifying devices, solves the problem of difficult correction of a water quality sensor, and adopts the technical scheme of solving the problem of difficult correction of the water quality sensor by draining pure water of a pure water pipeline to the upstream side of the water quality sensor to perform flushing self-correction on the water quality sensor. The invention is mainly used for realizing the automatic and low-cost correction of the water quality sensor of the water purifier.
Description
Technical Field
The invention relates to a water purifier, in particular to a self-correcting method for a water purifier sensor.
Background
The existing water purifier is more and more intelligent, the adopted water quality sensors are more and more, but most of the water quality sensors, such as sensors for detecting water quality parameters of TOC, COD, chromaticity, turbidity and the like, are calibrated when leaving a factory, after the sensors are used for a period of time, the service environment of the water quality sensors is changed, the surface of the water quality sensors is polluted or the water quality sensors drift, the error of measured data is larger, the measurement is inaccurate, and the recalibration is needed. The calibration work of the water quality sensor generally uses standard liquid, the water quality sensor needs to be detached and recalibrated, and for common users, time and labor are wasted, and most users cannot operate the water quality sensor. In addition, in which case the correction is necessary, it is difficult for the ordinary user to grasp.
Disclosure of Invention
The invention aims to provide a self-correcting method of a water purifier sensor, which realizes automatic and low-cost correction of a water quality sensor.
In order to achieve the purpose, the invention adopts the following technical scheme: a self-correcting method for a water purifier sensor comprises the steps that pure water of a pure water pipeline is drained to the upstream side of a water quality sensor to wash the water quality sensor to be self-corrected.
Furthermore, the water quality sensor acquires a detection value in the process of pure water flushing, the detection value is recorded as a reference value D1 corrected by the water quality sensor after being stabilized, and when the water purifier normally produces water, D1 is subtracted from the detection value acquired by the water quality sensor to obtain an actual display value D.
Furthermore, the water quality sensor has a correction parameter delta D, and when the water purifier normally produces water, D1 and delta D are subtracted from a detection value obtained by the water quality sensor to obtain an actual display value D.
Further, the water quality sensor is washed for a plurality of times by pure water of a certain time or a certain flow rate in a self-correcting process, stable detection values after each washing are recorded, and a reference value D1 is obtained after all stable detection values are weighted and averaged.
Further, the self-correcting period of the water quality sensor of the water purifier is T, T = K A, A is a power-on time constant of the water purifier, K is a factor for improving the quality of the reaction water, and a primary function K = a + D + b (a and b are constants) or a secondary function K = a + D + b + c (a, b and c are constants) or a step function K = [ D ] is satisfied.
Furthermore, a plurality of water quality sensors are provided, each water quality sensor corresponds to one K, and the K is the maximum of all K or K = a 1K 1+ a 2K 2+ … + an n kn, wherein a1 and a2 … an are constants and a1+ a2+ … + an = 1.
Further, the water temperature of D1 is T1 obtained in the self-correction process of the water quality sensor, when the deviation between T1 and the self-correction water temperature T0 set by the water quality sensor factory exceeds a preset value, the water quality sensor is corrected again, and T1 is assigned to T0 after the correction is completed.
Further, the pure water pipeline is communicated with the original water pipeline through a flushing pipeline, the water quality sensor closes the original water pipeline from the beginning of correction, then the flushing pipeline is opened to enable the pure water of the pure water pipeline to flow back to the original water pipeline, the original water pipeline is provided with a booster pump, and the booster pump works to enable the pure water of the original water pipeline to flush the water quality sensor.
Furthermore, the raw water pipeline is provided with a water inlet electromagnetic valve, the water inlet electromagnetic valve is located on the upstream side of the water quality sensor, the flushing pipeline is connected between the water inlet electromagnetic valve and the water quality sensor, the flushing pipeline is provided with a flushing control valve for controlling the on-off of the flushing pipeline and preventing raw water from entering the flushing pipeline in a countercurrent mode, after the water inlet electromagnetic valve is closed, the flushing control valve is opened, the booster pump works, and the self-correction work of the water quality sensor is started.
Furthermore, the pure water pipeline is communicated with a water storage barrel, and after the water quality sensor starts to perform self-correction work, the water storage barrel provides pure water to flush the water quality sensor.
After the technical scheme is adopted, the invention has the following advantages: because the pure water of the pure water pipeline is relatively clean liquid and basically has no other impurities, the pure water of the pure water pipeline can be used for replacing the standard liquid for cleaning the water quality sensor, so that a user does not need to specially purchase the standard liquid for cleaning the water quality sensor, and the use cost of the user is reduced; in addition, because the pure water of pure water pipeline can be used at any time, therefore the water purifier can wash the correction to water quality sensor automatically according to self needs, save the user and judge whether need wash and add relevant operations such as standard liquid, made things convenient for the user to use, very big degree has alleviateed the burden that the user used the water purifier, and the water purifier can carry out automatic correction to water quality sensor in addition, and intelligent degree is higher, and long-term result of use is better.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a waterway connection according to a first embodiment of the present invention;
FIG. 2 is a diagram illustrating that K and D satisfy a linear function according to a first embodiment;
FIG. 3 is a diagram illustrating that K and D satisfy a quadratic function according to an embodiment I;
FIG. 4 is a diagram illustrating that K and D satisfy the step function according to one embodiment;
fig. 5 is a water path connection diagram according to a second embodiment of the invention.
Detailed Description
The first embodiment is as follows:
the invention provides a self-correcting method of a water purifier sensor, wherein the water purifier comprises a first filter element 1, a water quality sensor 21, a raw water pipeline 2, a pure water pipeline 3 and a concentrated water pipeline 4, the raw water pipeline 2, the pure water pipeline 3 and the concentrated water pipeline 4 are respectively communicated with the first filter element 1, the water quality sensor 21 is arranged on the raw water pipeline 2, the first filter element 1 of the embodiment adopts a reverse osmosis filter element, and therefore a booster pump 22 is also arranged on the raw water pipeline 2. The self-calibration method of the water purifier sensor comprises the steps of draining pure water in the pure water pipeline 3 to the upstream side of the water quality sensor 21 and carrying out flushing self-calibration on the water quality sensor 21.
Because the pure water of the pure water pipeline 3 is relatively clean liquid and basically has no other impurities, the pure water of the pure water pipeline 3 can be used for replacing the standard liquid for cleaning the water quality sensor 21, so that a user does not need to specially purchase the standard liquid for cleaning the water quality sensor 21, and the use cost of the user is reduced; in addition, because the pure water of pure water pipeline 3 can be used at any time, therefore the water purifier can wash the correction to water quality sensor 21 automatically according to self needs, save the user and judge whether need wash and add relevant operations such as standard solution, made things convenient for the user to use, very big degree has alleviateed the burden that the user used the water purifier, and the water purifier can carry out automatic correction to water quality sensor 21 in addition, and intelligent degree is higher, and long-term result of use is better.
In the present embodiment, as shown in fig. 1, the upstream end of the raw water pipe 2 is connected to an external water source, for example, tap water, the raw water pipe 2 is provided with a pre-filter 23, a water inlet solenoid valve 24, a water quality sensor 21 and a booster pump 22, the pure water pipe 3 is connected to the raw water pipe 2 through a flushing pipe 5, the water quality sensor 21 closes the raw water pipe 2 from the beginning of calibration, then opens the flushing pipe 5 to return pure water in the pure water pipe 3 to the raw water pipe 2, and the booster pump 22 operates to flush the water quality sensor 21 with pure water in the raw water pipe 2. The water quality sensor 21 is generally arranged at the downstream side of the water inlet electromagnetic valve 24, and the connection part of the flushing pipeline 5 and the raw water pipeline 2 is arranged at the upstream side of the water quality sensor 21, so that the flushing pipeline 5 is connected between the water inlet electromagnetic valve 24 and the water quality sensor 21, the flushing pipeline 5 is provided with a flushing control valve 51 for controlling the on-off of the flushing pipeline 5 and preventing the raw water from reversely flowing into the flushing pipeline 5, after the water inlet electromagnetic valve 24 is closed, the flushing control valve 51 is opened, the booster pump 22 works, and the self-correction work of the water quality sensor 21 is started. The pre-filter element 23 can adopt a single-stage or multi-stage filter element, for example, a PP cotton filter element and a pre-activated carbon filter element are adopted in the embodiment. To improve the purity of pure water, the pure water line 3 may be provided with a post-filter 31, and similar to the pre-filter 23, the post-filter 31 may be a single-stage or multi-stage filter, for example, the post-activated carbon filter is used in this embodiment, so that the flushing line 5 may be connected to the downstream side of the post-filter 31. The upstream end of the pure water pipeline 3 can be provided with a check valve 32 to prevent the pure water from flowing back into the first filter element 1. The concentrated water pipeline 4 is provided with a concentrated water proportional valve 41, and the concentrated water can be directly discharged into a sewer and also can be discharged into other water storage containers for other uses.
In the specific correction process, the water quality sensor 21 acquires a detection value in the pure water flushing process, the detection value is recorded as a reference value D1 after the water quality sensor 21 is corrected after being stabilized, the reference value changes because the water quality sensor 21 can generate scale after being used for a long time, the stable detection value obtained after the pure water flushing process is the current reference value of the water quality sensor 21, the reference value can be used as the calculation basis of the detection value within a period of time, and when the water purifier normally produces water, the detection value acquired by the water quality sensor 21 is subtracted from D1 to obtain an actual display value D, so that the accuracy of the water quality sensor 21 is improved. Some water quality sensors 21 have a correction parameter delta D when leaving the factory, and when the water purifier normally produces water, D1 and delta D are subtracted from a detection value obtained by the water quality sensors 21 to obtain an actual display value D, so that the detection error is further reduced.
In order to improve the accuracy of the self-calibration, the water quality sensor 21 is washed with pure water for a certain time or a certain flow rate several times in one self-calibration process, and stable detection values after each washing are recorded, and a reference value D1 is obtained by weighted-averaging all the stable detection values.
The calibration cycle of the self-calibration of the water quality sensor 21 of the water purifier is T, T = K × a, a is a power-on time constant of the water purifier, K is a factor reflecting the quality of the water, and satisfies a primary function K = a × D + b (a and b are constants), as shown in fig. 2, or satisfies a secondary function K = a × D + b × D + c (a, b, and c are constants), as shown in fig. 3, or satisfies a step function K = [ D ], as shown in fig. 4. It is understood that the higher D, the worse the water quality, the smaller K, and the shorter the self-calibration period, and conversely, the lower D, the better the water quality, the larger K, and the longer the self-calibration period, an intermediate value Dm can be set in advance, and when D = Dm, K =1, that is, the last calibration period is maintained.
In addition, the influence of the temperature on the water quality sensor 21 can be considered, the water temperature of D1 obtained in the self-correction process of the water quality sensor 21 is T1, when the deviation between T1 and the self-correction water temperature T0 set by the water quality sensor 21 in the factory exceeds a preset value, the water quality sensor 21 is corrected again, and T1 is assigned to T0 after the correction is completed, so that the influence of the temperature can be eliminated, and the self-correction precision can be further improved.
Example two:
in the first embodiment, only one water quality sensor 21 is provided, and in an actual product, the water quality sensor 21 may be provided with a plurality of, for example, two, three or more, and each water quality sensor 21 has one K, so that K associated with the self-correcting correction period T is the maximum of all K or K = a 1K 1+ a 2K 2+ … + an n K, where a1 and a2 … an are constants and a1+ a2+ … + an = 1.
Other contents not described in this embodiment may refer to embodiment one.
Example three:
as shown in fig. 5, the pure water pipeline 3 is further connected to a water storage tank 33, and after the water quality sensor 21 starts calibration, the water storage tank 33 can supply pure water to flush the water quality sensor 21.
Other contents not described in this embodiment may refer to embodiment one.
Besides the reverse osmosis filter element, the first filter element can also adopt a super filter element or a nano filter element, and a booster pump is not needed correspondingly. Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.
Claims (8)
1. A self-correcting method of a water purifier sensor is characterized in that the self-correcting method of the water purifier sensor comprises the steps that pure water of a pure water pipeline is drained to the upstream side of a water quality sensor to wash and self-correct the water quality sensor;
the water quality sensor obtains a detection value in the process of washing with pure water, the detection value is recorded as a reference value D1 corrected by the water quality sensor after being stabilized, and when the water purifier normally produces water, D1 is subtracted from the detection value obtained by the water quality sensor to obtain an actual display value D;
the self-correcting period of the water quality sensor of the water purifier is T, T is K A, A is a power-on time constant of the water purifier, K is a factor for reflecting the quality of water quality, and a first function K is a D + b or a quadratic function K is a D2+ b + D + c or satisfy a step function K ═ D]。
2. The self-correcting method for the water purifier sensor according to claim 1, wherein the water quality sensor has a correction parameter Δ D, and when the water purifier normally produces water, D1 and Δ D are subtracted from the detection value obtained by the water quality sensor to obtain an actual display value D.
3. The self-calibration method for the water purifier sensor according to claim 1 or 2, wherein the water quality sensor is washed several times by pure water for a certain time or a certain flow rate in one self-calibration process, and a stable detection value is recorded after each washing, and a reference value D1 is obtained by weighted-averaging all the stable detection values.
4. The self-correcting method for the water purifier sensor according to claim 1, wherein a plurality of water quality sensors are provided, each water quality sensor corresponds to one K, the maximum of K is taken as K, or K is a 1K 1+ a 2K 2+ … + an n kn, wherein a1 and a2 … an are constants, and a1+ a2+ … + an is 1.
5. The self-correcting method of the water purifier sensor according to claim 1 or 2, wherein the water temperature of D1 is T1 obtained in the self-correcting process of the water quality sensor, when the deviation of T1 and the self-correcting water temperature T0 set by the water quality sensor from the factory exceeds a preset value, the water quality sensor is corrected again, and T1 is assigned to T0 after the correction is completed.
6. The self-calibration method of a water purifier sensor according to claim 1 or 2, wherein the water quality sensor is started to self-calibrate, the raw water pipeline is closed, and then the flushing pipeline is opened to enable pure water in the pure water pipeline to flow back to the raw water pipeline, the raw water pipeline is provided with a booster pump, and the booster pump works to enable pure water in the raw water pipeline to flush the water quality sensor.
7. The self-calibration method for the water purifier sensor according to claim 6, wherein the raw water pipeline is provided with a water inlet solenoid valve, the water inlet solenoid valve is positioned at the upstream side of the water quality sensor, the flushing pipeline is connected between the water inlet solenoid valve and the water quality sensor, after the water inlet solenoid valve is closed, the flushing control valve is opened, the booster pump works, and the self-calibration work of the water quality sensor is started.
8. The self-calibration method for the sensor of the water purifier as claimed in claim 6, wherein the pure water pipeline is connected to a water storage tank, and after the self-calibration operation of the water quality sensor is started, the water storage tank supplies pure water to flush the water quality sensor.
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| CN108226437B (en) * | 2018-04-09 | 2021-04-30 | 山东建筑大学 | Method for correcting water quality monitoring result applied to lake and reservoir water body |
| CN109179581A (en) * | 2018-10-22 | 2019-01-11 | 福建东亚环保科技股份有限公司 | A kind of integrated water quality detecting device forming pure water calibration with Treated sewage reusing |
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