CN115490345B - Control method for water purifier and water purifier - Google Patents

Control method for water purifier and water purifier Download PDF

Info

Publication number
CN115490345B
CN115490345B CN202210767864.0A CN202210767864A CN115490345B CN 115490345 B CN115490345 B CN 115490345B CN 202210767864 A CN202210767864 A CN 202210767864A CN 115490345 B CN115490345 B CN 115490345B
Authority
CN
China
Prior art keywords
water
tds value
target
opening
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210767864.0A
Other languages
Chinese (zh)
Other versions
CN115490345A (en
Inventor
刘宁
薛瑞华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Strauss Water Equipment Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Strauss Water Equipment Co Ltd
Haier Smart Home Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Strauss Water Equipment Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Strauss Water Equipment Co Ltd
Priority to CN202210767864.0A priority Critical patent/CN115490345B/en
Publication of CN115490345A publication Critical patent/CN115490345A/en
Application granted granted Critical
Publication of CN115490345B publication Critical patent/CN115490345B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D11/00—Control of flow ratio
    • G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
    • G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
    • G05D11/139—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring a value related to the quantity of the individual components and sensing at least one property of the mixture
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Flow Control (AREA)

Abstract

The invention relates to the technical field of water purifying equipment, in particular to a control method for a water purifier and the water purifier, and aims to solve the problem that the prior water purifier cannot adjust the TDS value of filtered pure water and influences the use experience of users. For this purpose, the water proportion regulating valve of the invention comprises a first water inlet, a second water inlet and a water outlet, wherein two ends of the first water way are respectively communicated with the water outlet end and the first water inlet of the reverse osmosis membrane water purifying filter element, and two ends of the second water way are respectively communicated with the water outlet end and the second water inlet of the preposed filter element, and the control method of the invention comprises the following steps: acquiring a current TDS value of a water outlet; obtaining a target TDS value; and selectively adjusting the opening degree of the water proportion adjusting valve according to the current TDS value and the target TDS value. According to the invention, the opening of the water proportional regulating valve can be selectively regulated according to the current TDS value and the target TDS value to regulate the water inflow of the first waterway and the second waterway, so that the TDS value of the water outlet can be conveniently regulated, and the use experience of a user is improved.

Description

Control method for water purifier and water purifier
Technical Field
The invention relates to the technical field of water purifying equipment, and particularly provides a control method for a water purifier and the water purifier.
Background
With the continuous development of the water purification industry, the water purifier has various appearances, but the water purifier is basically used for obtaining healthy and clean drinking water. The relationship between the TDS value of pure water purified by an RO membrane and the RO membrane of the RO water purifier in the market at present is the largest, namely, the TDS value of pure water flowing out of the water purifier can only be the TDS value of pure water purified by the RO membrane.
The TDS value of pure water flowing out of the existing water purifier after being purified by the RO membrane cannot be adjusted according to the requirement of a user, so that the user can only obtain pure water with a single TDS value, and the use experience of the user is affected.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
The invention aims to solve the technical problems that the prior water purifier cannot adjust the TDS value of filtered pure water and influence the use experience of users.
In a first aspect, the present invention provides a control method for a water purifier including a pre-filter cartridge, a reverse osmosis membrane water purification cartridge, a first waterway, a second waterway, a water ratio adjustment valve, and a water outlet waterway, wherein a water outlet end of the pre-filter cartridge is communicated with a water inlet end of the reverse osmosis membrane water purification cartridge, the water ratio adjustment valve has a first water inlet, a second water inlet, and a water outlet, one end of the first waterway is communicated with the water outlet end of the reverse osmosis membrane water purification cartridge, the other end of the first waterway is communicated with the first water inlet, one end of the second waterway is communicated with the water outlet end of the pre-filter cartridge, the other end of the second waterway is communicated with the second water inlet, the water outlet waterway is communicated with the water outlet, a water inlet amount of the first water inlet decreases with an increase in an opening of the water ratio adjustment valve, and a water inlet amount of the second water inlet increases with an increase in an opening of the water ratio adjustment valve, the control method includes: acquiring a current TDS value E1 of the water outlet; obtaining a target TDS value E0; and selectively adjusting the opening degree of the water proportion adjusting valve according to the current TDS value E1 and the target TDS value E0.
In a preferred technical solution of the above control method, the specific step of selectively adjusting the opening degree of the water proportional adjustment valve according to the current TDS value E1 and the target TDS value E0 includes: judging whether the current TDS value E1 is equal to the target TDS value E0 or not; if the judgment result is yes, not adjusting the opening degree of the water proportion adjusting valve; and if the judgment result is NO, adjusting the opening degree of the water proportion adjusting valve.
In a preferred technical solution of the above control method, the specific step of "adjusting the opening degree of the water proportional control valve" includes: calculating a first difference Δ1= |e0-e1|; comparing the first difference delta 1 with a first preset value A1; according to the comparison result, selecting a corresponding preset adjusting mode to adjust the opening of the water proportion adjusting valve; wherein A1 > 0.
In the preferred technical solution of the control method, the specific step of selecting a corresponding preset adjustment mode to adjust the opening of the water proportional adjustment valve according to the comparison result includes: if Δ1 > A1, a first target opening D is calculated from the current TDS value E1 and the target TDS value E0 1 The method comprises the steps of carrying out a first treatment on the surface of the Adjusting the opening degree of the water proportion adjusting valve to the first target opening degree D 1 。
In a preferred embodiment of the above control method, the first target opening D is calculated according to the current TDS value E1 and the target TDS value E0 1 The specific steps of "comprise: acquiring the current opening D of the water proportion regulating valve t The method comprises the steps of carrying out a first treatment on the surface of the Calculating a first demand adjustment amount DeltaD 1 =k1× (E0-E1); calculating the first target opening D 1 ＝D t +△D 1 The method comprises the steps of carrying out a first treatment on the surface of the Where k1 is the feed forward coefficient.
In the preferred technical solution of the control method, the specific step of selecting a corresponding preset adjustment mode to adjust the opening of the water proportional adjustment valve according to the comparison result includes: if delta 1 is less than or equal to A1, firstly adjusting the opening of the water proportion adjusting valve to be a preset opening D 0 The method comprises the steps of carrying out a first treatment on the surface of the Obtaining a TDS value E2 of the water outlet after adjustment; according to the preset opening D 0 Calculating a second target opening D from the current TDS value E1, the target TDS value E0 and the adjusted TDS value E2 of the water outlet 2 The method comprises the steps of carrying out a first treatment on the surface of the Adjusting the opening degree of the water proportion adjusting valve to the second target opening degree D 2 。
In a preferred embodiment of the above control method, the control unit is configured to "according to the preset opening D 0 Calculating a second target opening D from the current TDS value E1, the target TDS value E0 and the adjusted TDS value E2 of the water outlet 2 The specific steps of "comprise: calculating a second demand adjustment amount DeltaD 2 =k2× (E0-E2) +k3×e0+k4× (E0-2×e2+e1); calculating the second target opening D 2 ＝D 0 +△D 2 The method comprises the steps of carrying out a first treatment on the surface of the Where k2 is the scaling factor and k3 is the productThe coefficients, k4, are the differential coefficients.
In the preferable technical scheme of the control method, the water purifier further comprises an alarm device, and the control method further comprises: acquiring a TDS value E4 of water in the first waterway; and selectively starting the alarm device according to the TDS value E4 and the target TDS value E0 of the water in the first waterway.
In a preferred technical solution of the above control method, the specific steps of selectively activating the alarm device according to the TDS value E4 and the target TDS value E0 of the water in the first waterway include: calculating a second difference Δ2=e0-E4; comparing the second difference delta 2 with a second preset value A2; selectively starting the alarm device according to the comparison result; wherein A2 is more than or equal to 0.
In a second aspect, the present invention provides a water purifier comprising a controller configured to be able to perform the control method described above.
Under the condition of adopting the technical scheme, the water purifier provided by the invention can selectively adjust the opening of the water proportion adjusting valve through the target TDS value set by a user and the current TDS value of the water outlet, so that the water inflow amount flowing into the water proportion adjusting valve from the reverse osmosis membrane water purifying filter element and the pre-filtering filter element is convenient to adjust, the TDS value of mixed water of the water outlet is further adjusted, the user obtains water with the required TDS value, and the use experience of the user is improved.
Further, by judging whether the target TDS value of the water outlet required by the user is equal to the current TDS value of the water outlet, when the target TDS value required by the user is unequal to the current TDS value of the water outlet, the opening degree of the water proportion adjusting valve is adjusted to adjust the water inflow of the first water inlet and the second water inlet, so that the TDS value of the water outlet is adjusted, the TDS value of the water outlet is matched with the target TDS value required by the user, and the user obtains water with the target TDS value required by the user at the water outlet; when the target TDS value required by the user is equal to the current TDS value of the water outlet, the opening degree of the water proportion regulating valve is not required to be regulated, and the water with the target TDS value required by the user is obtained at the water outlet.
Further, by calculating the first difference delta 1 and comparing the first difference delta 1 with the first preset value A1, the difference between the current TDS value E1 and the target TDS value E0 can be judged, on one hand, the adjustment mode of small-amplitude adjustment of the opening of the water proportional adjustment valve is convenient when the current TDS value E1 is relatively close to the target TDS value E0, water with excessive adjustment amplitude and the target TDS value can not be obtained is avoided, and the adjustment mode of large-amplitude adjustment of the opening of the water proportional adjustment valve is adopted when the difference between the current TDS value E1 and the target TDS value E0 is relatively large, so that the adjustment time is too long and the adjustment efficiency is prevented from being influenced; on the other hand, compared with the condition of being regulated only by one preset regulation mode, according to the comparison result of the first difference value delta 1 and the first preset value A1, the opening degree of the water proportional regulating valve is regulated by selecting the corresponding preset regulation mode, so that the TDS value of the water outlet is regulated more accurately, the regulation speed is higher, the efficiency is higher, and the use experience of a user is better.
Still further, the first target opening degree D is obtained empirically 1 And adjusts the opening degree of the water proportional control valve 133 to the first target opening degree D 1 In comparison with the case of (2), the first target opening D is calculated from the TDS value E1 and the target TDS value E0 1 The opening degree of the water proportional control valve 133 is then adjusted to the first target opening degree D 1 The opening degree of the water proportion regulating valve can be regulated faster, the regulating time of the TDS value is saved, and meanwhile, the calculation of the first target opening degree value can be more accurate.
Still further, when the current TDS value E1 and the target TDS value E0 differ relatively little, the opening degree of the water proportional adjustment valve can be adjusted to the preset opening degree D by first 0 Then, the TDS value E2 of the water outlet after adjustment is obtained, the conditions of a PID control algorithm are created, and the conditions pass through a preset opening D 0 The current TDS value E1, the target TDS value E0 and the TDS value E2 of the water outlet after adjustment, and a second target opening D is calculated according to a PID control algorithm 2 So that the second target opening degree of the water proportional regulating valve can be accurately calculated when the current TDS value E1 is very close to the target TDS value E0, and the water proportional regulating valve is regulated to the calculated second target opening degree, therebyThe TDS value of the water flowing out of the water outlet is more accurate, and the use experience of a user is further improved.
Still further, through setting up alarm device on the purifier, can in time start alarm device and remind the user to change reverse osmosis membrane water purification filter core when the TDS value E4 of the water in the first water route is higher than target TDS value E0, avoid influencing user's normal use, further promote user's use experience.
Still further, compared with the case of directly comparing the TDS value E4 of the water in the first waterway with the target TDS value E0, the difference between the TDS value E4 of the water in the first waterway and the target TDS value E0 is calculated first, and then the difference is compared with the second preset value A2, so that erroneous judgment caused by a detection error of the TDS value E4 of the water in the first waterway can be prevented, thereby judging accuracy.
In addition, the water purifier provided by the invention further adopts the control method, so that the control method has the beneficial effects that compared with the water purifier before improvement, the water purifier provided by the invention can quickly adjust the TDS value of purified pure water according to the requirement of a user, and simultaneously, the TDS value of the purified pure water obtained by the user is closer to the target TDS value, so that the use experience of the user is better.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of a water purifier according to the present invention;
FIG. 2 is a flow chart of a control method of the present invention;
fig. 3 is a flow chart of an embodiment of the control method of the present invention.
List of reference numerals:
1. a housing; 11. an inlet; 12. an outlet; 13. a chamber; 131. a reverse osmosis membrane water purification filter element; 1311. a first water inlet end; 1312. a first water outlet end; 132. a pre-filtration filter element; 1321. a second water inlet end; 1322. a second water outlet end; 133. a water ratio regulating valve; 1331. a first water inlet; 1332. a second water inlet; 1333. a water outlet; 134. a water outlet waterway; 1341. a first TDS sensor; 135. a first waterway; 1351. a second TDS sensor; 136. a second waterway; 137. a first water inlet pipe; 1371. a booster pump; 138. a second water inlet pipe; 14. and an alarm device.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "inner", "outer", and the like, indicating directions or positional relationships are based on directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it is to be noted that, in the description of the present invention, unless explicitly stated and defined otherwise, the terms "arrangement", "connection" and "connection" should be interpreted in a broad sense, and the specific meaning of the terms in the present invention can be understood by those skilled in the art in light of the specific circumstances.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a water purifier according to the present invention.
As shown in fig. 1, the water purifier of the present invention includes a housing 1, a chamber 13 formed in the housing 1, a pre-filter cartridge 132 and a reverse osmosis membrane water purification cartridge 131 provided in the chamber 13, and a water ratio regulating valve 133, the housing 1 of the water purifier having an inlet 11 and an outlet 12, the water ratio regulating valve 133 having a first water inlet 1331, a second water inlet 1332, and a water outlet 1333.
As shown in fig. 1, the water inlet end of the reverse osmosis membrane water purification cartridge 131 is denoted as a first water inlet end 1311, the water outlet end of the reverse osmosis membrane water purification cartridge 131 is denoted as a first water outlet end 1312, the water inlet end of the pre-filter cartridge 132 is denoted as a second water inlet end 1321, and the water outlet end of the pre-filter cartridge 132 is denoted as a second water outlet end 1322. The second water inlet end 1321 of the pre-filter cartridge 132 communicates with the inlet 11 via the first water inlet pipe 137, and the second water outlet end 1322 of the pre-filter cartridge 132 communicates with the first water inlet end 1311 of the reverse osmosis membrane water purification cartridge 131 via the second water inlet pipe 138.
As shown in fig. 1, the water purifier further includes a first water channel 135, a second water channel 136 and a water outlet channel 134, wherein one end of the first water channel 135 is communicated with the first water outlet end 1312 of the reverse osmosis membrane water purification filter element 131, the other end of the first water channel 135 is communicated with the first water inlet 1331, one end of the second water channel 136 is communicated with the second water outlet end 1322 of the pre-filtration filter element 132, the other end of the second water channel 136 is communicated with the second water inlet 1332, one end of the water outlet channel 134 is communicated with the water outlet 1333, and the other end of the water outlet channel 134 is communicated with the outlet 12.
It should be noted that, in practical applications, the second water channel 136 may be configured to be in communication with the second water inlet pipe 138 so that one end of the second water channel 136 is in communication with the second water outlet end 1322 of the pre-filtering filter element 132, or two interfaces may be configured at the second water outlet end 1322 of the pre-filtering filter element 132, where one interface is in communication with the second water inlet pipe 138 so as to convey the water filtered by the pre-filtering filter element 132 into the reverse osmosis membrane water purifying filter element 131, and the other interface is in communication with the second water channel 136 so as to convey the water filtered by the pre-filtering filter element 132 into the water proportional adjusting valve 133 through the second water inlet 1332, and so on, which are flexibly adjusted and changed without departing from the principle and scope of the present invention.
Preferably, as shown in fig. 1, one end of the second waterway 136 is provided in communication with the second inlet pipe 138.
As shown in fig. 1, the water purifier further includes a booster pump 1371 disposed on the first water inlet pipe 137, the booster pump 1371 being capable of delivering water to the pre-filter cartridge 132 and the reverse osmosis membrane water purification cartridge 131.
It should be noted that, in practical applications, the water proportional control valve 133 is not limited to be disposed in the housing 1, for example, the water proportional control valve 133 may be disposed outside the housing 1, and illustratively, a first water outlet pipe and a second water outlet pipe (not shown in the drawings) are disposed on the housing 1, one end of the first water outlet pipe is connected to the first water outlet end 1312 of the reverse osmosis membrane water purifying filter element 131, the other end of the first water outlet pipe is connected to the first water inlet 1331, one end of the second water outlet pipe is connected to the second water outlet end 1322 of the pre-filtering filter element 132, the other end of the second water outlet pipe is connected to the second water inlet 1332, and so on, which are flexibly adjusted and changed without departing from the principle and scope of the present invention. It is of course preferable to provide the water proportional control valve 133 in the housing 1.
It should be noted that, in practical applications, the person skilled in the art may set the water proportional adjustment valve 133 such that the water inflow amount of the first water inlet 1331 decreases as the opening of the water proportional adjustment valve 133 increases, the water inflow amount of the second water inlet 1332 increases as the opening of the water proportional adjustment valve 133 increases, or may set the water proportional adjustment valve 133 such that the water inflow amount of the first water inlet 1331 increases as the opening of the water proportional adjustment valve 133 increases, the water inflow amount of the second water inlet 1332 decreases as the opening of the water proportional adjustment valve 133 increases, and so on, which are flexibly adjusted and changed without departing from the principle and scope of the present invention.
A specific embodiment of the control method of the present invention will be described below taking as an example a case where the water ratio adjusting valve 133 is provided such that the water inflow amount of the first water inlet 1331 decreases as the opening degree of the water ratio adjusting valve 133 increases, and the water inflow amount of the second water inlet 1332 increases as the opening degree of the water ratio adjusting valve 133 increases.
Referring next to fig. 2, fig. 2 is a flow chart of the control method of the present invention.
As shown in fig. 2, the control method of the present invention includes the steps of:
s1000: acquiring a current TDS value E1 of a water outlet 1333;
s2000: obtaining a target TDS value E0;
s3000: the opening degree of the water ratio adjusting valve 133 is selectively adjusted according to the current TDS value E1 and the target TDS value E0.
Through the setting, the opening degree of the water proportion regulating valve 133 can be selectively regulated through the target TDS value set by a user and the current TDS value of the water outlet 1333, so that the water inflow amount flowing into the water proportion regulating valve 133 from the reverse osmosis membrane water purifying filter element 131 and the pre-filtering filter element 132 is conveniently regulated, the TDS value of mixed water of the water outlet 1333 is regulated, the user obtains water with the required TDS value, and the use experience of the user is improved.
It should be noted that, in practical applications, those skilled in the art may set the target TDS value to a fixed value, or may set the target TDS value to a set value input by the user, obtain the target TDS value according to the value input by the user, etc., and such flexible adjustment and modification are included in the protection scope of the present invention without departing from the principle and scope of the present invention.
Preferably, the target TDS value is set to a set value input by the user.
The TDS value refers to the concentration of the total dissolved substances in water, and is expressed in milligrams per liter (mg/L).
It should be further noted that, in practical applications, a person skilled in the art may set a TDS detection sensor on the water outlet channel 134 to obtain the current TDS value of the water outlet 1333, or may set a conductivity meter on the water outlet channel 134, and feed back the current TDS value of the water outlet 1333 through the value of the conductivity meter, or may directly take out the water sample on the water channel 134, directly measure the TDS value of the water sample to obtain the current TDS value of the water outlet 1333, and so on, which do not deviate from the principle and scope of the present invention, and all such flexible adjustment and change are included in the protection scope of the present invention.
Preferably, as shown in fig. 1, a first TDS sensor 1341 is provided on the water outlet path 134, and the current TDS value of the water outlet 1333 is obtained by a value detected by the first TDS sensor 1341.
Referring next to fig. 3, fig. 3 is a flow chart of an embodiment of the control method of the present invention.
Preferably, as shown in fig. 3, the specific step of selectively adjusting the opening degree of the water proportional adjustment valve 133 according to the current TDS value E1 and the target TDS value E0 includes:
S3100: judging whether the current TDS value E1 is equal to the target TDS value E0 or not;
s3110: if the determination result is "yes", the opening degree of the water proportional control valve 133 is not adjusted;
s3120: if the determination result is "no", the opening degree of the water ratio adjusting valve 133 is adjusted.
By such a setting, when the target TDS value of the user's demand is not equal to the current TDS value of the water outlet 1333, the water inflow amounts of the first water inlet 1331 and the second water inlet 1332 are adjusted by adjusting the opening degree of the water proportional adjustment valve 133, so that the TDS value of the water outlet 1333 is adjusted and the TDS value of the water outlet 1333 is matched with the target TDS value of the user's demand, and the user obtains the water of the target TDS value of the user's demand at the water outlet 1333; when the target TDS value required by the user is equal to the current TDS value of the water outlet 1333, the opening of the water proportional adjustment valve 133 is not required to be adjusted, i.e., the water of the target TDS value required by the user is obtained at the water outlet 1333.
It should be noted that, in practical applications, the person skilled in the art may set the current TDS value E1 equal to the target TDS value E0 to directly compare the current TDS value E1 with the target TDS value E0, if e1=e0, to indicate that the current TDS value E1 is equal to the target TDS value E0, or may set the current TDS value E1 equal to the target TDS value E0 to calculate the difference between the current TDS value E1 and the target TDS value E0 first, if the difference is within the preset range, to indicate that the current TDS value E1 is equal to the target TDS value E0, and so on, and such flexible adjustment and change do not deviate from the principle and the scope of the present invention, which should be included in the protection scope of the present invention.
Preferably, the specific step of determining whether the current TDS value E1 is equal to the target TDS value E0 includes:
calculating a third difference Δ3=e0-E1;
comparing the third difference delta 3 with a third preset value A3 and a fourth preset value A4 respectively;
if A3 is less than or equal to delta 3 is less than or equal to A4, the current TDS value E1 is equal to the target TDS value E0;
wherein A3 is less than 0 and A4 is more than 0.
With this arrangement, erroneous judgment due to a detection error of the TDS value of the water outlet 1333 by the first TDS sensor 1341 can be avoided.
It should be noted that, in practical applications, a person skilled in the art may set the opening of the water proportional adjustment valve 133 to be adjusted by a preset adjustment manner, for example, by adjusting the set opening value for each time in a multiple adjustment manner, or may first calculate the difference between the current TDS value E1 and the target TDS value E0, then select a corresponding preset adjustment manner according to the difference to adjust the opening of the water proportional adjustment valve 133, etc., where such adjustment and change of the specific adjustment manner of the opening of the water proportional adjustment valve 133 do not deviate from the principle and scope of the present invention, and are included in the protection scope of the present invention.
Preferably, as shown in fig. 3, the specific step of "adjusting the opening degree of the water proportional control valve 133" includes:
S3121: calculating a first difference Δ1= |e0-e1|;
s3122: comparing the first difference delta 1 with a first preset value A1;
s3123: selecting a corresponding preset adjusting mode to adjust the opening of the water proportional adjusting valve 133 according to the comparison result;
wherein A1 > 0.
Through the arrangement, on one hand, the difference between the current TDS value E1 and the target TDS value E0 can be judged according to the comparison result of the first difference delta 1 and the first preset value A1, so that the adjustment mode of small-amplitude adjustment of the opening of the water proportional adjustment valve 133 is conveniently adopted when the current TDS value E1 and the target TDS value E0 are relatively close to each other, water with excessive adjustment amplitude, which cannot obtain the target TDS value, is avoided, the adjustment mode of large-amplitude adjustment of the opening of the water proportional adjustment valve 133 is adopted when the difference between the current TDS value E1 and the target TDS value E0 is relatively large, and the adjustment time overlength caused by excessively small adjustment amplitude is avoided, and the water outlet efficiency of the water outlet 1333 is influenced; on the other hand, compared with the case of adjusting only by one preset adjusting mode, according to the comparison result of the first difference value delta 1 and the first preset value A1, selecting the corresponding preset adjusting mode to adjust the opening of the water proportional adjusting valve 133 can enable the adjustment of the TDS value of the water outlet 1333 to be more accurate, the adjusting speed to be faster, the efficiency to be higher, and the user experience to be better.
It should be noted that, in practical application, the method is not limited to calculating the absolute value of the difference between the current TDS value E1 and the target TDS value E0, comparing the absolute value of the difference with the first preset value, and selecting a corresponding preset adjustment mode to adjust the opening of the water proportional adjustment valve 133 according to the comparison result, or calculating the absolute value of the ratio between the current TDS value E1 and the target TDS value E0, comparing the absolute value of the ratio with the first preset value, selecting a corresponding preset adjustment mode to adjust the opening of the water proportional adjustment valve 133 according to the comparison result, and so on.
It should be noted that, in practical application, the method is not limited to calculating the absolute value of the difference between the current TDS value E1 and the target TDS value E0, and comparing the absolute value with the first preset value, for example, the method may also be used to calculate the difference between the current TDS value E1 and the target TDS value E0, and then compare the difference with two preset values at the same time, which is not deviated from the principle and scope of the present invention. It is of course preferable to calculate the absolute value of the difference between the current TDS value E1 and the target TDS value E0 before comparing the absolute value with the first preset value.
Preferably, the specific step of selecting a corresponding preset adjustment manner to adjust the opening degree of the water ratio adjustment valve 133 according to the comparison result includes:
if Delta1 > A1, a first target opening D is calculated from the current TDS value E1 and the target TDS value E0 1 ；
The opening degree of the water proportional control valve 133 is adjusted to a first target opening degree D 1 。
By such a setting, the first target opening degree D is obtained empirically 1 And the opening degree of the water proportion regulating valve 133Is adjusted to a first target opening degree D 1 In comparison with the case of (2), the first target opening D is calculated from the TDS value E1 and the target TDS value E0 1 The opening degree of the water proportional control valve 133 is then adjusted to the first target opening degree D 1 The opening degree of the water proportion regulating valve can be regulated faster, the regulating time of the TDS value is saved, and meanwhile, the calculation of the first target opening degree value can be more accurate.
It should be noted that, in practical application, the calculation of the first target opening D based on the current TDS value E1 and the target TDS value E0 is not limited to 1 For example, multiple sets of the first difference Δ1 and the first target opening D may be found empirically 1 Then the corresponding values of the corresponding values are compared with a plurality of groups of corresponding values to obtain a first target opening D 1 Etc., such as a first target opening D 1 And modifications and variations in the specific manner of acquisition without departing from the spirit and scope of the invention are intended to be included within the scope of the present invention.
It should be further noted that, in practical applications, a person skilled in the art may directly calculate the first target opening D of the water proportional control valve 133 1 Alternatively, the current opening of the water proportional control valve 133 may be obtained, the required adjustment amount of the water proportional control valve 133 may be calculated, and then the first target opening D may be calculated 1 Such modifications and variations that do not depart from the spirit and scope of the present invention are intended to be included within the scope of the present invention.
Preferably, the first target opening D is calculated based on the current TDS value E1 and the target TDS value E0 1 The specific steps of "comprise:
acquiring the current opening D of the water proportional control valve 133 t ；
Calculating a first demand adjustment amount DeltaD 1 ＝k1×(E0-E1)；
Calculating a first target opening D 1 ＝D t +△D 1 The method comprises the steps of carrying out a first treatment on the surface of the Where k1 is the feed forward coefficient.
By setting such that the demand adjustment amount is calculated first and then the first target opening degree D is calculated 1 And directly calculating the first target opening D 1 Compared with the prior art, the method can reduce the factorThe error of the water proportional control valve 133 is relative to the first target opening degree D 1 The adjustment of the proportional control valve 133 is more accurate, so that the TDS value of the water outlet 1333 is close to the target TDS value, and the accuracy of TDS adjustment is improved.
It should be noted that, in practical applications, a person skilled in the art may determine the specific value of k1 according to experience or experiment.
Illustratively, the current TDS value of the water outlet is set to E1 i Let the opening degree of the water proportional control valve be adjusted by n i % of (i.e. DeltaD 1 ) Then the TDS value of the water outlet is equal to the target TDS value, and the opening degree of the water proportion regulating valve is measured to regulate n i % after TDS value E0 of water outlet i Repeating the above operations to obtain multiple groups and n i % of corresponding E1 i 、E0 i Substituting a plurality of sets of data into the following formula:
△D 1 ＝k1×(E0-E1)；
the following equation is obtained:
n 1 ％＝k1×(E0 1 -E1 1 )；
n 2 ％＝k1×(E0 2 -E1 2 )；
n 3 ％＝k1×(E0 3 -E1 3 )；
n i ％＝k1×(E0 i -E1 i )；
wherein i > 0;
in the above equations, any equation is taken as a unitary one-time equation containing an unknown number k1, and the unitary one-time equation is solved, so that the value of k1 can be calculated.
It should be noted that, in order to make the obtained k1 relatively accurate, the values of a plurality of k1 may be calculated by different equations, and then the values of a plurality of k1 may be averaged to obtain a relatively accurate value k1, or the above-mentioned plurality of sets of data may be subjected to curve fitting, for example, n i % is y-axis, E0 i -E1 i For the x axis, performing curve fitting to obtain a straight line with a slope of k1, and obtaining k1 Specific values.
Preferably, the specific step of selecting a corresponding preset adjustment manner to adjust the opening degree of the water ratio adjustment valve 133 according to the comparison result includes:
if Δ1 is less than or equal to A1, the opening of the water proportional control valve 133 is adjusted to a preset opening D 0 ；
Acquiring a TDS value E2 of the adjusted water outlet 1333;
according to the preset opening degree D 0 Calculating a second target opening D from the current TDS value E1, the target TDS value E0, and the TDS value E2 of the outlet 1333 after adjustment 2 ；
The opening degree of the water proportional control valve 133 is adjusted to the second target opening degree D 2 。
With such a setting, when the current TDS value E1 differs from the target TDS value E0 by a relatively small amount, it is possible to adjust the opening degree of the water proportional adjustment valve 133 to the preset opening degree D by first 0 Then, the TDS value E2 of the regulated water outlet 1333 is obtained, conditions of a PID control algorithm are created, and the conditions are controlled by a preset opening D 0 The current TDS value E1, the target TDS value E0 and the TDS value E2 of the water outlet 1333 after adjustment, and a second target opening D is calculated according to a PID control algorithm 2 So that the second target opening degree D of the water proportional adjustment valve 133 can be accurately calculated even when the current TDS value E1 is very close to the target TDS value E0 2 And adjusts the water proportional adjustment valve 133 to the calculated second target opening degree D 2 Therefore, the TDS value of the water flowing out of the water outlet 1333 is more accurate, and the use experience of a user is further improved.
It should be noted that, in practical application, a person skilled in the art can determine the preset opening D according to experience or experiment 0 Or preset opening D 0 Directly to a fixed value, etc., and such flexible adjustments and changes do not depart from the principle and scope of the present invention, and are intended to be included in the scope of the present invention.
Preferably, the preset opening degree D is empirically determined 0 Opening value of (2).
It should be noted that, in practical applications, a person skilled in the art may calculate the value of the second target opening D2 according to the position PID control algorithm, or may calculate the value of the second target opening D2 according to the incremental PID control algorithm, etc., which are flexibly adjusted and changed without departing from the principle and scope of the present invention, and all the methods are included in the protection scope of the present invention.
Preferably, "according to the preset opening degree D 0 Calculating a second target opening D from the current TDS value E1, the target TDS value E0, and the TDS value E2 of the outlet 1333 after adjustment 2 The specific steps of "comprise:
calculating a second demand adjustment amount DeltaD 2 ＝k2×(E0-E2)+k3×E0+k4×(E0-2×E2+E1)；
Calculating a second target opening D 2 ＝D 0 +△D 2 ；
Where k2 is the scaling factor, k3 is the integration factor, and k4 is the differentiation factor.
Through the arrangement, compared with the situation that the second demand adjustment quantity is calculated through the position type PID control algorithm, the second demand adjustment quantity is calculated through the increment type PID control algorithm, the second demand adjustment quantity can be calculated only according to the TDS value of the water outlet 1333 obtained three times, the calculation is simple, the calculation error is reduced, meanwhile, the second demand adjustment quantity can be accurately calculated when the water purifier fails, the calculation accuracy of the second target opening degree is improved, the accuracy of the TDS value of the water outlet 1333 is improved, the TDS value of the water outlet 1333 after adjustment is enabled to be closer to the target TDS value of the user demand, and the use experience of the user is further improved.
If the opening of the water proportional control valve 133 is set to be in units of% and the TDS value is set to be in units of mg/L, the units of k1, k2, k3, and k4 are set to be L/100mg for unit unification.
It should be further noted that, in practical applications, a person skilled in the art may determine the specific values of k2, k3, k4 according to experience or experiment.
Illustratively, the current TDS value of the water outlet is set to E1 j The opening degree of the water proportion regulating valve is regulated to a preset opening degreeD 0 The TDS value of the subsequent water outlet is E2 j Assume that the opening of the water proportional control valve is adjusted by m j % of (i.e. DeltaD 2 ) The TDS value of the water outlet is equal to the target TDS value, and the opening of the water proportion regulating valve is set to be increased by m j % after the water outlet has a TDS value of E0 j And measuring and raising the opening of the water proportion regulating valve by m j % after-outlet TDS value E0 j Repeating the above operations to obtain multiple groups and m j % of corresponding E1 j 、E2 j 、E0 j Substituting a plurality of sets of data into the following formula:
△D 2 ＝k2×(E0-E2)+k3×E0+k4×(E0-2×E2+E1)；
the following equation is obtained:
m 1 ％＝k2×(E0 1 -E2 1 )+k3×E0 1 +k4×(E0 1 -2×E2 1 +E1 1 )；
m 2 ％＝k2×(E0 2 -E2 2 )+k3×E0 2 +k4×(E0 2 -2×E2 2 +E1 2 )；
m 3 ％＝k2×(E0 3 -E2 3 )+k3×E0 3 +k4×(E0 3 -2×E2 3 +E1 3 )；
m j ％＝k2×(E0 j -E2 j )+k3×E0 j +k4×(E0 j -2×E2 j +E1 j )；
wherein j > 0.
In the equations above, three equations are taken to form a ternary once equation set containing unknowns k2, k3 and k4, and the ternary once equation set is solved, so that the numerical values of k2, k3 and k4 can be calculated.
A specific embodiment of whether or not it is necessary to adjust the opening degree of the water ratio adjusting valve 133 will be described in detail below in conjunction with several cases.
A3= -2mg/L, a4=2 mg/L was set.
Case one:
if the current TDS value e1=20 mg/L, the target TDS value e0=20 mg/L, e1=e0, the opening degree of the water proportional control valve 133 is not adjusted.
And a second case:
if the current TDS value E1=21 mg/L, the target TDS value E0=20 mg/L;
Then Δ3=e0-e1=20-21= -1mg/L, a3 < Δ3 < A4, the opening degree of the water proportional control valve 133 is not adjusted.
Case three:
if the current TDS value E1=15 mg/L, the target TDS value E0=20 mg/L;
then Δ3=e0-e1=20-15=5 mg/L, Δ3 > A4, and a corresponding preset adjustment mode is selected to adjust the opening of the water proportional adjustment valve 133.
Case four:
if the current TDS value E1=25 mg/L, the target TDS value E0=20 mg/L;
then Δ3=e0-e1=20-25= -5mg/L, Δ3 < A3, and then the corresponding preset adjustment mode is selected to adjust the opening of the water proportional adjustment valve 133.
It should be noted that, in practical applications, a person skilled in the art may determine the specific value of A1 according to experience or experiment.
Illustratively, a1=5 mg/L.
Specific embodiments of the present invention for adjusting the opening degree of the water ratio adjusting valve 133 will be described in detail below in conjunction with several cases.
Case one:
if the current TDS value E1=30mg/L, the target TDS value E0=15mg/L;
then the first difference Δ1= |e0-e1|= |15-30|=15 mg/L, Δ1 > A1;
then the first demand adjustment quantity DeltaD is calculated 1 And then adjusting the quantity DeltaD according to the first requirement 1 And the current opening degree D t To calculate a first target opening D 1 。
And a second case:
If the current TDS value E1=5 mg/L, the target TDS value E0=15 mg/L;
then the first difference Δ1= |e0-e1|= |15-5|=10 mg/L, Δ1 > A1;
then the first demand adjustment quantity DeltaD is calculated 1 According toFirst demand adjustment amount Δd 1 And the current opening degree D t To calculate a first target opening D 1 。
Case three:
if the current TDS value E1=20mg/L, the target TDS value E0=15mg/L;
the first difference Δ1= |e0-e1|= |15-20|=5 mg/L, Δ1=a1;
the opening degree of the water proportional control valve 133 is adjusted to a preset opening degree D 0 And then calculates a second demand adjustment amount DeltaD 2 Then adjusting the quantity delta D according to the preset opening D0 and the second demand 2 To calculate the second target opening degree D 2 。
Case four:
if the current TDS value E1=18 mg/L, the target TDS value E0=15 mg/L;
then the first difference Δ1= |e0-e1|= |15-18|=3 mg/L, Δ1 < A1;
the opening degree of the water proportional control valve 133 is adjusted to a preset opening degree D 0 And then calculates a second demand adjustment amount DeltaD 2 Then adjusting the quantity delta D according to the preset opening D0 and the second demand 2 To calculate the second target opening degree D 2 。
Case five:
if the current TDS value e1=12 mg/L, the target TDS value e0=15 mg/L;
then the first difference Δ1= |e0-e1|= |15-12|=3 mg/L, Δ1 < A1;
The opening degree of the water proportional control valve 133 is adjusted to a preset opening degree D 0 And then calculates a second demand adjustment amount DeltaD 2 Then adjusting the quantity delta D according to the preset opening D0 and the second demand 2 To calculate the second target opening degree D 2 。
Regarding the first target opening degree D 1 And a second target opening degree D 2 The calculation process of (2) is not described in detail herein.
In practical application, as the reverse osmosis membrane water purification cartridge 131 is used, the TDS value of the water purified by the reverse osmosis membrane water purification cartridge 131 gradually increases, especially when the service life of the reverse osmosis membrane water purification cartridge 131 reaches the theoretical service life, the TDS value in the first waterway 135 increases, and when the TDS value in the first waterway 135 increases to the target TDS value, the water with the target TDS value required by the user cannot be obtained from the water outlet 1333, so that the user needs to replace the reverse osmosis membrane water purification cartridge 131 in time.
It should be further noted that, in practical applications, a person skilled in the art may periodically replace the reverse osmosis membrane water purification filter 131 according to experience, or may also set an alarm device on the water purifier, selectively activate the alarm device according to the TDS value and the target TDS value in the first water path 135, send an alarm through the alarm device to prompt the user to replace the reverse osmosis membrane water purification filter 131, etc., which do not deviate from the principle and scope of the present invention, and are included in the protection scope of the present invention.
Preferably, as shown in fig. 1, the water purifier further comprises an alarm device 14, and the alarm device 14 can give an alarm to a user.
Preferably, the control method of the present invention further comprises the steps of:
acquiring a TDS value E4 of water in the first waterway 135;
the alarm device 14 is selectively activated according to the TDS value E4 and the target TDS value E0 of the water in the first waterway 135.
Through such setting, be convenient for when the TDS value E4 of the water in the first water route 135 is higher than target TDS value E0, then adjust the aperture of water proportional control valve 133 nevertheless, also can not obtain the required target TDS value of user, can in time start alarm device 14 and remind the user to change reverse osmosis membrane water purification filter core 131 this moment, avoid influencing user's normal use, further promote user's use experience.
It should be noted that, in practical applications, those skilled in the art may set the alarm device 14 as an acoustic alarm unit, or may set the alarm device 14 as an optical alarm unit, or may set the alarm device 14 as an alarm unit with a combination of acoustic and optical, etc., and such modifications and changes to the specific setting type of the alarm device 14 are included in the protection scope of the present invention without departing from the principle and scope of the present invention.
Preferably, the alarm device 14 is provided as an alarm unit with a combination of sound and light.
It should be noted that, in practical applications, a person skilled in the art may directly compare the TDS value E4 and the target TDS value E0 of the water in the first waterway 135, selectively activate the alarm device 14 according to the comparison result, or may first calculate the difference between the TDS value E4 and the target TDS value E0 of the water in the first waterway 135, then compare the difference with a preset value, selectively activate the alarm device 14 according to the comparison result, or may first calculate the ratio between the TDS value E4 and the target TDS value E0 of the water in the first waterway 135, selectively activate the alarm device 14 according to the comparison result, and so on, which flexibly adjusts and changes without departing from the principle and scope of the present invention.
Preferably, the specific steps of selectively activating the alarm device 14 "according to the TDS value E4 and the target TDS value E0 of the water in the first waterway 135 include:
calculating a second difference Δ2=e0-E4;
comparing the second difference delta 2 with a second preset value A2;
selectively activating the alarm device 14 based on the comparison;
Wherein A2 is more than or equal to 0.
With such an arrangement, compared with the case where the TDS value E4 of the water in the first waterway 135 is directly compared with the target TDS value E0, the difference between the TDS value E4 of the water in the first waterway 135 and the target TDS value E0 is calculated first, and then the difference is compared with the second preset value A2, so that erroneous judgment due to a detection error of the TDS value E4 of the water in the first waterway 135 can be prevented, thereby improving the accuracy of judgment.
Preferably, the specific steps of selectively activating the alarm device 14 "according to the comparison result include: if Delta2 > A2, the alarm device 14 is not activated.
Through such a setting, when Δ2 > A2, it is indicated that the TDS value of the water in the first waterway 135 is still smaller than the target TDS value, and at this time, even if the TDS value of the water purified by the reverse osmosis membrane water purification cartridge 131 is increased, the water with the target TDS value required by the user can be called out, that is, the reverse osmosis membrane water purification cartridge 131 can still be used continuously, so that the frequency of replacing the reverse osmosis membrane water purification cartridge 131 can be reduced, the cost can be saved for the user, and the use experience of the user can be further improved.
Preferably, the specific steps of selectively activating the alarm device 14 "according to the comparison result include: if Delta2.ltoreq.A2 and the duration of Delta2.ltoreq.A2 exceeds a preset time, the alarm device 14 is activated.
By such arrangement, on the one hand, when Δ2 is less than or equal to A2, it is explained that the TDS value of the water in the first waterway 135 is increased to be relatively close to the target TDS value, and at this time, it is highly likely that the water of the target TDS value required by the user is not obtained, so that the alarm device 14 is started to remind the user to replace the reverse osmosis membrane water purification cartridge 131 in time so as not to affect the normal use of the user; on the other hand, compared with the case that the alarm device 14 is started only when the delta 2 is less than or equal to A2, when the duration time of the delta 2 is less than or equal to A2 exceeds the preset time, the alarm device 14 is started, erroneous judgment caused by a certain detection error can be avoided, and the use experience of a user is further improved.
It should be noted that, in practical applications, a person skilled in the art may set a TDS sensor on the first waterway 135 to obtain the TDS value E4 in the first waterway 135, or may set a conductivity meter on the first waterway 135, feedback the TDS value in the first waterway 135 through data of the conductivity meter, etc., which are flexibly adjusted and changed without departing from the principle and scope of the present invention, and are all included in the protection scope of the present invention.
Preferably, as shown in fig. 1, a second TDS sensor 1351 is provided on the first waterway 135.
It should be noted that the water purifier of the present invention further includes a controller configured to execute the control method described above.
It should be further noted that, in practical application, a person skilled in the art may set the controller to be in communication connection with the first TDS sensor 1341 and the second TDS sensor 1351 so as to implement intelligent data collection of the water purifier, or set the controller to be in communication connection with the water proportional control valve 133 so as to implement automatic adjustment of the water proportional control valve 133, or set the controller to be in communication connection with the alarm device 14 so as to implement intelligent reminding of the water purifier, thereby further improving the use experience of the user.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims (7)

1. The control method for the water purifier is characterized in that the water purifier comprises a pre-filter element, a reverse osmosis membrane water purification filter element, a first waterway, a second waterway, a water proportion regulating valve and a water outlet waterway, wherein the water outlet end of the pre-filter element is communicated with the water inlet end of the reverse osmosis membrane water purification filter element, the water proportion regulating valve is provided with a first water inlet, a second water inlet and a water outlet, one end of the first waterway is communicated with the water outlet end of the reverse osmosis membrane water purification filter element, the other end of the first waterway is communicated with the first water inlet, one end of the second waterway is communicated with the water outlet end of the pre-filter element, the other end of the second waterway is communicated with the second water inlet, the water outlet waterway is communicated with the water outlet, the water inlet amount of the first water inlet is reduced along with the increase of the opening of the water proportion regulating valve, and the water inlet amount of the second water inlet is increased along with the increase of the opening of the water proportion regulating valve.
Acquiring a current TDS value E1 of the water outlet;
obtaining a target TDS value E0;
selectively adjusting the opening degree of the water proportion adjusting valve according to the current TDS value E1 and the target TDS value E0;
the specific step of selectively adjusting the opening degree of the water proportional adjustment valve according to the current TDS value E1 and the target TDS value E0 includes:
judging whether the current TDS value E1 is equal to the target TDS value E0 or not;
if the judgment result is yes, not adjusting the opening degree of the water proportion adjusting valve;
if the judgment result is NO, the opening degree of the water proportion regulating valve is regulated;
the specific steps of adjusting the opening degree of the water proportion adjusting valve comprise:
calculating a first difference Δ1= |e0-e1|;
comparing the first difference delta 1 with a first preset value A1;
according to the comparison result, selecting a corresponding preset adjusting mode to adjust the opening of the water proportion adjusting valve;
wherein A1 > 0;
the specific step of selecting a corresponding preset adjusting mode to adjust the opening degree of the water proportion adjusting valve according to the comparison result comprises the following steps:
if delta 1 is less than or equal to A1, firstly adjusting the opening of the water proportion adjusting valve to be a preset opening D 0 ；
Obtaining a TDS value E2 of the water outlet after adjustment;
according to the preset opening D 0 Calculating a second target opening D according to a PID control algorithm by the current TDS value E1, the target TDS value E0 and the adjusted TDS value E2 of the water outlet 2 ；
Adjusting the opening degree of the water proportion adjusting valve to the second target opening degree D 2 。
2. The control method according to claim 1, wherein the specific step of "selecting a corresponding preset adjustment manner to adjust the opening degree of the water proportional adjustment valve according to the comparison result" includes:
if Δ1 > A1, then based on the current TDS value E1 and the target TDS valueE0 calculates a first target opening D 1 ；
Adjusting the opening degree of the water proportion adjusting valve to the first target opening degree D 1 。
3. The control method according to claim 2, characterized in that a first target opening degree D is calculated from the current TDS value E1 and the target TDS value E0 1 The specific steps of "comprise:
acquiring the current opening D of the water proportion regulating valve t ；
Calculating a first demand adjustment amount DeltaD 1 =k1×( E0- E1)；
Calculating the first target opening D 1 =D t +△D 1 ；
Where k1 is the feed forward coefficient.
4. The control method according to claim 1, characterized in that "according to the preset opening degree D 0 Calculating a second target opening D from the current TDS value E1, the target TDS value E0 and the adjusted TDS value E2 of the water outlet 2 The specific steps of "comprise:
calculating a second demand adjustment amount DeltaD 2 =k2×（E0-E2）+k3×E0+k4×(E0-2×E2+E1)；
Calculating the second target opening D 2 =D 0 +△D 2 ；
Where k2 is the scaling factor, k3 is the integration factor, and k4 is the differentiation factor.
5. The control method according to any one of claims 1 to 4, wherein the water purifier further comprises an alarm device, the control method further comprising:
acquiring a TDS value E4 of water in the first waterway;
and selectively starting the alarm device according to the TDS value E4 and the target TDS value E0 of the water in the first waterway.
6. The control method according to claim 5, wherein the specific step of selectively activating the alarm means according to the TDS value E4 and the target TDS value E0 of the water in the first waterway includes:
calculating a second difference Δ2=e0-E4;
comparing the second difference delta 2 with a second preset value A2;
selectively starting the alarm device according to the comparison result;
wherein A2 is more than or equal to 0.
7. A water purifier comprising a controller configured to be able to perform the control method of any one of claims 1 to 6.
CN202210767864.0A 2022-06-30 2022-06-30 Control method for water purifier and water purifier Active CN115490345B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210767864.0A CN115490345B (en) 2022-06-30 2022-06-30 Control method for water purifier and water purifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210767864.0A CN115490345B (en) 2022-06-30 2022-06-30 Control method for water purifier and water purifier

Publications (2)

Publication Number Publication Date
CN115490345A CN115490345A (en) 2022-12-20
CN115490345B true CN115490345B (en) 2023-08-18

Family

ID=84466701

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210767864.0A Active CN115490345B (en) 2022-06-30 2022-06-30 Control method for water purifier and water purifier

Country Status (1)

Country Link
CN (1) CN115490345B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117742132A (en) * 2023-12-20 2024-03-22 上海水成环保科技股份有限公司 Method, device, equipment and computer readable medium for controlling water quality parameters

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101408133A (en) * 2007-10-09 2009-04-15 比亚迪股份有限公司 Control method of engine electric air throttle
CN102953842A (en) * 2011-08-29 2013-03-06 比亚迪股份有限公司 Control method of electronic throttle valve
CN108264155A (en) * 2017-01-04 2018-07-10 北京思维力科技发展有限公司 A kind of water purifier for adjusting production water TDS values
CN109282522A (en) * 2018-10-10 2019-01-29 珠海格力电器股份有限公司 Temprature control method based on ratio adjusting valve and the air heat source pump with it
CN110530031A (en) * 2018-05-24 2019-12-03 青岛海尔智能技术研发有限公司 A kind of gas heater control method
CN213924252U (en) * 2020-10-16 2021-08-10 云米互联科技(广东)有限公司 Water purification system and water purification unit convenient to TDS regulation and control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101408133A (en) * 2007-10-09 2009-04-15 比亚迪股份有限公司 Control method of engine electric air throttle
CN102953842A (en) * 2011-08-29 2013-03-06 比亚迪股份有限公司 Control method of electronic throttle valve
CN108264155A (en) * 2017-01-04 2018-07-10 北京思维力科技发展有限公司 A kind of water purifier for adjusting production water TDS values
CN110530031A (en) * 2018-05-24 2019-12-03 青岛海尔智能技术研发有限公司 A kind of gas heater control method
CN109282522A (en) * 2018-10-10 2019-01-29 珠海格力电器股份有限公司 Temprature control method based on ratio adjusting valve and the air heat source pump with it
CN213924252U (en) * 2020-10-16 2021-08-10 云米互联科技(广东)有限公司 Water purification system and water purification unit convenient to TDS regulation and control

Also Published As

Publication number Publication date
CN115490345A (en) 2022-12-20

Similar Documents

Publication Publication Date Title
CN115490345B (en) Control method for water purifier and water purifier
US5198116A (en) Method and apparatus for measuring the fouling potential of membrane system feeds
EP2249942A1 (en) A water supply unit for providing purified water
CN112520817B (en) Reverse osmosis water purification system control method and device and reverse osmosis water purification system
US9739653B2 (en) Flow sensor
DK2639203T3 (en) Device and method for operating a membrane separation device
US4576723A (en) Estimation of the degree of dispersion in flowing concentrated dispersions
JP4666600B2 (en) Water evaluation method
CN108380051B (en) Stable energy-saving reverse osmosis system and control method thereof
CN103868960A (en) Water purification machine, measuring method and measuring device of TDS (Total Dissolved Solids) value of water purification machine
CN104847958A (en) Constant-current constant-temperature water mixing valve
JP6342101B1 (en) Membrane separation apparatus and membrane separation method
CN108261927A (en) A kind of life detecting method of the reverse osmosis filter core of water purifier
KR20180007479A (en) Water purifier
RU2671323C1 (en) Fluid cleaning system
KR20190068056A (en) control method of waste water outflow for RO filter of water purifier
CN211546081U (en) Dissolved oxygen adaptive control device
CN110862141A (en) Dissolved oxygen adaptive control device and method thereof
CN111003765A (en) Water purification system and water purifier with constant proportion of pure wastewater
US20190277675A1 (en) Flowmeter
JP7000063B2 (en) Cleaning air volume control device and cleaning air volume control method
CN211896190U (en) Water purification system and water purifier of pure waste water proportion of many gears control
CN211896191U (en) Water purification system and water purifier with constant proportion of pure wastewater
KR20140146388A (en) Two stage membrane filtration system having flexible recovery ratio and operation method thereof
CN101699261B (en) Method for monitoring suspended solid SS in sludge water of water treatment plant

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant