CN110939178A - Water age control system for secondary water supply equipment - Google Patents
Water age control system for secondary water supply equipment Download PDFInfo
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- CN110939178A CN110939178A CN201911392148.3A CN201911392148A CN110939178A CN 110939178 A CN110939178 A CN 110939178A CN 201911392148 A CN201911392148 A CN 201911392148A CN 110939178 A CN110939178 A CN 110939178A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 333
- 230000001105 regulatory effect Effects 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 55
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- 238000013528 artificial neural network Methods 0.000 claims description 8
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- 238000001914 filtration Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 2
- 239000008400 supply water Substances 0.000 claims description 2
- 239000008399 tap water Substances 0.000 abstract description 6
- 235000020679 tap water Nutrition 0.000 abstract description 6
- 238000005660 chlorination reaction Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 230000003203 everyday effect Effects 0.000 description 4
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- 238000004364 calculation method Methods 0.000 description 3
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/02—Arrangements or adaptations of tanks for water supply for domestic or like local water supply
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/072—Arrangement of flowmeters
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/075—Arrangement of devices for control of pressure or flow rate
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
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- 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
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Abstract
The invention relates to a water age control system for secondary water supply equipment, which comprises a flowmeter, a liquid level meter, an adjusting valve, a pressure meter, a water tank and a controller, wherein the controller is respectively connected with the flowmeter, the liquid level meter, the adjusting valve and the pressure meter; an intelligent analysis engine is arranged in the controller, and the intelligent analysis engine is used for acquiring water consumption data of a plurality of months and predicting a water consumption mode curve based on the water consumption data of the plurality of months; the controller judges and classifies the water consumption property through the water consumption mode curve, calculates the water storage capacity curve of the water tank according to the water consumption mode curve, obtains the water inlet capacity curve of the water tank according to the water storage capacity curve and the water consumption mode curve, and controls the regulating valve in real time according to the target water inlet capacity. The invention can ensure the dynamic regulation of the tap water in the water tank.
Description
Technical Field
The invention relates to the technical field of water storage quality control of a water tank, in particular to a water age control system for secondary water supply equipment.
Background
With the acceleration of the urbanization process of China, high-rise residences are pulled out of the ground, secondary water supply is increased day by day, however, drinking water is often subjected to secondary pollution after passing through secondary water supply equipment, the water quality of the water supply is affected, a lot of suspended matters exist in a secondary water supply system, and after sampling and detecting of water in partial water tanks, the situation that bacteria seriously exceed the standard is found. According to investigation, in general, only two or three months are needed, the suspended matters in the water tank can reach dozens of liters per cubic meter, the thickness of sludge under the water tank can exceed ten centimeters, and simultaneously, odor is also accompanied, which is very far worse than the requirement of secondary water supply quality.
At present, the problem of water age is generally solved by regular equipment cleaning and secondary chlorination, the secondary water supply equipment is manually maintained and cleaned or is subjected to secondary chlorination again in a certain period, the labor cost consumed by the modes is undoubtedly higher, the secondary chlorination can also increase the economic cost, the water quality cannot be updated in time, and the water quality can also reach the critical value of bacteria before cleaning or chlorination.
Disclosure of Invention
The invention provides a water age control system for secondary water supply equipment, which can control the opening and closing degree of a valve of the secondary water supply equipment through a software intelligent analysis engine to solve the water age problem in the secondary water supply equipment.
The technical scheme adopted by the invention for solving the technical problems is as follows: the water age control system for the secondary water supply equipment comprises a flowmeter, a liquid level meter, an adjusting valve, a pressure meter, a water tank and a controller, wherein the flowmeter is used for monitoring the real-time inflow flow; the liquid level meter is used for monitoring the real-time liquid level value of the water tank; the pressure gauge is used for monitoring real-time pressure; the regulating valve is used for controlling the water inlet flow of the water tank; the water tank is used for storing water; the controller is respectively connected with the flowmeter, the liquid level meter, the regulating valve and the pressure meter, and controls the regulating valve according to the real-time detection values of the flowmeter, the liquid level meter and the pressure meter; an intelligent analysis engine is arranged in the controller, and the intelligent analysis engine is used for acquiring water consumption data of a plurality of months and predicting a water consumption mode curve based on the water consumption data of the plurality of months; the controller judges and classifies the water consumption property through the water consumption mode curve, calculates the water storage capacity curve of the water tank according to the water consumption mode curve, obtains the water inlet capacity curve of the water tank according to the water storage capacity curve and the water consumption mode curve, and controls the regulating valve in real time according to the target water inlet capacity.
The intelligent analysis engine predicts a water consumption mode curve through a BP neural network, generates a real water consumption mode curve through actual water consumption data of the same day, calculates an error between the real water consumption mode curve and the predicted water consumption mode curve, reversely transmits the error to each hidden layer of the BP neural network, calculates the error of each hidden layer, updates a weight according to the error of each hidden layer to obtain a new prediction result, and controls the regulating valve by using the new prediction result.
When the prediction result deviates from the actual water consumption data of the current day due to random factors, the intelligent analysis engine corrects the prediction result through a Kalman filtering theory, and the controller adjusts the opening of the regulating valve in real time according to specific conditions that the water consumption requirement is not met.
When the intelligent analysis engine judges the water consumption property to be off-peak time through the predicted water consumption pattern curve, the controller controls the regulating valve through the change of the pressure gauge and the liquid level meter, and specifically comprises the following steps: when the municipal pressure is greater than the negative pressure and is relieved, if the detection value of the liquid level meter is lower than a first threshold liquid level, the regulating valve is opened fully to feed water, if the detection value of the liquid level meter is increased to a second threshold liquid level, the opening degree of the regulating valve is regulated to 40%, and if the detection value of the liquid level meter reaches a third threshold liquid level, the regulating valve is closed; when the municipal pressure is between the lower negative pressure limit and the negative pressure relief, if the detection value of the liquid level meter is lower than a first threshold liquid level, the regulating valve is opened fully to feed water, if the detection value of the liquid level meter is increased to a second threshold liquid level, the opening degree of the regulating valve is regulated to be 30%, and if the detection value of the liquid level meter reaches a third threshold liquid level, the regulating valve is closed automatically; when municipal administration pressure is less than the negative pressure lower limit, the governing valve is closed, and when the detected value of level gauge low to first threshold value liquid level, the governing valve is full-open and is intake.
When the intelligent analysis engine judges the water consumption property to be in a peak period through the predicted water consumption mode curve, the controller controls the regulating valve to be closed, the period of the peak period is adjusted according to the indication of the upper computer, and when the detection value of the liquid level meter is lower than a first threshold liquid level, the regulating valve is fully opened to supply water.
When the intelligent analysis engine judges the water consumption property to be the night water storage period according to the predicted water consumption mode curve, the controller controls the opening of the regulating valve to ensure that the water tank is in a full water state before the night water storage period is finished.
The water storage curve of the water tank is calculated according to the water consumption mode curve, and the water inlet curve of the water tank is obtained according to the water storage curve and the water consumption mode curve, wherein the water storage curve comprises the following specific steps: and (3) assuming that the current water storage capacity of the water tank can only meet the water consumption in the future K hours, obtaining a water storage capacity curve of the water tank based on the sum of the current water storage capacity of the water tank and the water consumption in the future K hours, and obtaining a water inflow curve according to the current water inflow which is the next-moment water storage capacity- (the current water storage capacity-the current water consumption).
Advantageous effects
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects: according to the invention, the tail end water consumption data is analyzed through the big data and the BP neural network, a water consumption curve of a user is simulated, the water consumption modes in non-peak periods and peak periods are identified and predicted, and the opening and closing degree of a valve of secondary water supply equipment is automatically controlled by combining the water storage capacity of the water tank, so that the dynamic regulation of tap water in the water tank is ensured, and the water stored in the water tank is circularly updated every day. The invention adopts the regulating valve which can be self-regulated and remotely controlled, so that the average water outlet age of the secondary water supply equipment is shortened, compared with the regular water tank cleaning and the secondary chlorination, the labor cost and the economic cost are undoubtedly saved, and the water quality of the tail end of the secondary water supply is improved.
Drawings
FIG. 1 is a graph of predicted water usage patterns in an embodiment of the present invention;
fig. 2 is a water storage capacity curve of a water tank based on a water consumption pattern curve in the embodiment of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The embodiment of the invention relates to a water age control system for secondary water supply equipment, which comprises a flow meter, a liquid level meter, a display screen, a regulating valve, a pressure meter, a water tank and a controller.
The flowmeter is positioned at an inlet of the water age control system and used for monitoring the real-time inflow rate. The liquid level meter is positioned in the water tank and used for monitoring the real-time liquid level value of the water tank, and a downstream water consumption mode curve can be calculated through the flow meter and the liquid level meter and used for adjusting the prediction model.
The display screen provides manual mode control to the lower computer, the setting of high, medium and low level value can be realized through the operation of touch-sensitive screen, the high, medium and low level value can be directly modified to the condition that the current actual water consumption is far less than the water tank volume to make the valve closing level reduced, and the water can be ensured to be updated in time in the water tank. The display screen also provides a function of setting water supply time intervals, can manually change the interval range of each water supply time interval according to actual conditions, and also provides a function of directly operating the opening and closing degree of the regulating valve.
The regulating valve is used for controlling the water inlet flow of the water tank, so that a water tank scheduling scheme is realized, and tap water can be timely updated.
The pressure gauge is used for monitoring real-time pressure and controlling the opening and closing degree of the regulating valve in linkage with the liquid level meter and the flow meter. The water tank is used for storing water, adjusting the water quantity and pressure of downstream facilities and showing the water age problem of the secondary water supply equipment by the water age control system.
This embodiment has the control valve of automatically regulated ability, and supports remote control, compares in the float valve more intelligent. Flowmeter, level gauge, governing valve and pressure gauge all link to each other with the controller in this embodiment, and this controller is inside to be equipped with intelligent analysis engine.
The intelligent analysis engine may perform feature recognition for water usage behavior. It can be after collecting local water consumption data that is close to three months, wash and classify the water consumption data, train the input layer input of the water consumption data after will handling as BP neural network to carry out the quantitative analysis to the factor that influences the water consumption action, include: weather, temperature, week, season, holidays and the like which are all influence factors influencing the trend of water consumption are input into the BP neural network as different hidden layers, and an output layer is obtained through calculation of weights between the input layer and the different hidden layers, wherein the specific calculation mode is that
Wherein y isjRepresenting the result value, w, of the corresponding jth hidden layerijRepresents the weight, x, of the ith input layer corresponding to the jth hidden layeriRepresenting the corresponding value of the ith input layer, bjF () is an activation function for the threshold corresponding to the jth hidden layer, and n corresponds to the number of input layers. And initializing weight value, using positive-too distribution with the mean value of 0 and the variance of k/n, wherein k depends on an activation function, the calculation result of the output layer is a predicted local water consumption mode curve, judging and classifying local water use quality through the curve, calculating a water storage capacity curve of the water tank and a water inlet capacity curve of the water tank according to the water consumption mode curve, and controlling the regulating valve in real time according to the target water inlet capacity.
On the basis of predicting the water consumption mode curve, in order to meet the national standard that the age of the used water in the water tank is not more than 4 hours and consider that the water quantity is instantly and completely mixed when water enters the water tank, the embodiment adopts the idea that the water stored in the current water tank only meets the water consumption of two hours in the future. The specific implementation method comprises the following steps: FIG. 1 shows a predicted water consumption curve, and based on the water consumption, the sum of the water consumption of 2-point and 3-point water storage amount in a 1-point water tank, namely 17m3And by analogy, the water storage capacity curve of the water tank can be obtained, as shown in fig. 2. The water inlet curve is obtained according to the next moment of water storage amount- (current water storage amount-current water consumption), namely the water inlet at the point 1 is the water storage amount at the point 2- (1 point water storage amount-1 point water consumption), and the like, so that the water inlet curve of the water tank can be obtained, the target water inlet of each hour is transmitted to the lower computer through the platform, and the regulating valve can be controlled in real time to achieve the target water inlet to complete control and scheduling.
The intelligent analysis engine is a self-learning backward-adjusting prediction model. The obtained pattern curve is generated only by historical data samples, and the input influence factors are only data of about three months, and influence factors which may be generated in one year, such as: the factors such as seasonal changes, population migration changes and target population changes are considered less, so that in order to ensure that the water consumption law of the next day can be predicted accurately every day, the intelligent analysis engine also needs to continuously acquire the actual water consumption data of the current day, generate a real water consumption mode curve, calculate the error between the real water consumption and the predicted water consumption, reversely propagate the error to each hidden layer, calculate the error of each hidden layer, update the weight according to the error of each hidden layer, then obtain a new prediction result, and obtain a new scheduling scheme by using the new prediction result.
Finally, for the scheduling scheme which is started to be implemented on the same day, when the actual water demand and the predicted value are greatly deviated, namely the predicted value and the actual value are deviated due to random factors, and if the water demand cannot be met due to accidental conditions such as pipe explosion and the like, the intelligent analysis engine can also rectify the predicted value through a Kalman filtering theory, adjust the opening of the adjusting valve in real time according to the specific conditions which do not meet the water demand, and guarantee the water demand, so that the predicted value can be adjusted in real time according to the actual water demand.
The water age control system for the secondary water supply equipment of the embodiment has three control modes, specifically as follows:
manual mode control of water age controller
After entering the manual mode, the opening proportion of the regulating valve is modified through the human-computer interface, and the water age control system accurately regulates the opening according to the opening proportion and controls the water inlet flow of the water tank.
The automatic mode control of the water age controller is realized, different water supply periods (off-peak, peak and night) exist in a tap water network, the periods can be obtained by taking three months of user water consumption data and utilizing a user water consumption curve simulated by a big data analysis and artificial intelligence prediction algorithm, and the method corresponds to different control strategies in different periods, and comprises the following steps:
policy one, off-peak period control
And at the time, the water age controller is controlled in a linkage manner by referring to the value of the tap water pressure through the changes of the pressure and the liquid level.
When the municipal pressure is greater than the negative pressure and is relieved, if the water level of the water tank is lower than the water shortage liquid level, the regulating valve is fully opened to feed water. And if the water level in the water tank rises to the middle liquid level, the opening degree of the regulating valve is regulated to 40 percent. If the high liquid level is reached, the regulating valve is automatically closed.
When the municipal pressure is between the lower negative pressure limit and the negative pressure relief, if the water level in the water tank is lower than the water shortage level, the regulating valve is fully opened to feed water. If the water level of the water tank rises to the middle liquid level, the opening of the regulating valve is regulated to be 30 percent. If the high liquid level is reached, the regulating valve is automatically closed.
When municipal pressure is less than the negative pressure lower limit, the regulating valve forcibly closes the water tank to feed water, and when the water level in the water tank is low to the water shortage level, the regulating valve is fully opened to feed water.
Strategy two, peak period control
Three initial peak time periods are configured when the human-computer interface leaves a factory, the time can be calculated through experience values or big data and an artificial intelligence prediction algorithm, and after the time goes into the peak time period, the water tank is forcibly closed to prevent the municipal pressure fluctuation water age control system from feeding water. The host computer platform incorporates time periods of maximum water usage during a day for a range of time (1 week, 1 month, 1 quarter, half year, all year) used by the user, each of which may be 1 hour or 2 hours. And automatically and remotely adjusting the peak regulation time period of the lower computer according to the flow change value. When the water level in the water tank is lowered to the water shortage level in the peak period, the regulating valve is opened fully to feed water.
Strategy III and night water storage mode
The accessible host computer sets up night time interval, when the mode of retaining water at night begins, adjusts the aperture of governing valve, guarantees that night time interval interior water tank water holds fully, guarantees before the mode of retaining water at night ends that the water tank is in full water state.
Remote mode control of water age controller
The remote control does not support manual control, and when the remote control is activated, the automatic control can be switched off by an instruction, and then the remote control can be performed. The water age control system can be opened, closed or opening degree adjusted through remote control commands.
The upper computer platform adjusts the existing prediction model by using the water use data of the same day through a deep learning algorithm, and continuously adjusts the prediction model to ensure that the water stored in the water tank can be circularly updated every day. The upper computer can directly modify the water supply time interval and can set the valve closing liquid level.
The invention analyzes the tail end water consumption data through big data and BP neural network, simulates the water consumption curve of the user, identifies and predicts the water consumption modes in non-peak period and peak period, automatically controls the valve opening and closing degree of the secondary water supply equipment by combining the water storage capacity of the water tank, ensures the dynamic regulation of the tap water in the water tank, and leads the water stored in the water tank to be circularly updated every day. The invention adopts the regulating valve which can be self-regulated and remotely controlled, so that the average water outlet age of the secondary water supply equipment is shortened, compared with the regular water tank cleaning and the secondary chlorination, the labor cost and the economic cost are undoubtedly saved, and the water quality of the tail end of the secondary water supply is improved.
Claims (7)
1. A water age control system for secondary water supply equipment comprises a flowmeter, a liquid level meter, an adjusting valve, a pressure meter, a water tank and a controller, and is characterized in that the flowmeter is used for monitoring the real-time inflow flow; the liquid level meter is used for monitoring the real-time liquid level value of the water tank; the pressure gauge is used for monitoring real-time pressure; the regulating valve is used for controlling the water inlet flow of the water tank; the water tank is used for storing water; the controller is respectively connected with the flowmeter, the liquid level meter, the regulating valve and the pressure meter, and controls the regulating valve according to the real-time detection values of the flowmeter, the liquid level meter and the pressure meter; an intelligent analysis engine is arranged in the controller, and the intelligent analysis engine is used for acquiring water consumption data of a plurality of months and predicting a water consumption mode curve based on the water consumption data of the plurality of months; the controller judges and classifies the water consumption property through the water consumption mode curve, calculates the water storage capacity curve of the water tank according to the water consumption mode curve, obtains the water inlet capacity curve of the water tank according to the water storage capacity curve and the water consumption mode curve, and controls the regulating valve in real time according to the target water inlet capacity.
2. The water age control system for secondary water supply equipment according to claim 1, wherein the intelligent analysis engine predicts a water consumption pattern curve through a BP neural network, generates a real water consumption pattern curve according to actual water consumption data of the same day, calculates an error between the real water consumption pattern curve and the predicted water consumption pattern curve, reversely propagates the error to each hidden layer of the BP neural network, calculates an error of each hidden layer, updates a weight according to the error of each hidden layer to obtain a new prediction result, and controls the regulating valve by using the new prediction result.
3. The water age control system for a secondary water supply device according to claim 1, wherein when the predicted result deviates from the current actual water consumption data due to random factors, the intelligent analysis engine further corrects the predicted result through the kalman filtering theory, and the controller adjusts the opening of the regulating valve in real time according to specific conditions that do not meet the water consumption requirement.
4. The water age control system for a secondary water supply facility according to claim 1, wherein when the smart analysis engine determines the water usage property as the off-peak period through the predicted water usage pattern curve, the controller controls the adjusting valve through a change of the pressure gauge and the level gauge, in particular: when the municipal pressure is greater than the negative pressure and is relieved, if the detection value of the liquid level meter is lower than a first threshold liquid level, the regulating valve is opened fully to feed water, if the detection value of the liquid level meter is increased to a second threshold liquid level, the opening degree of the regulating valve is regulated to 40%, and if the detection value of the liquid level meter reaches a third threshold liquid level, the regulating valve is closed; when the municipal pressure is between the lower negative pressure limit and the negative pressure relief, if the detection value of the liquid level meter is lower than a first threshold liquid level, the regulating valve is opened fully to feed water, if the detection value of the liquid level meter is increased to a second threshold liquid level, the opening degree of the regulating valve is regulated to be 30%, and if the detection value of the liquid level meter reaches a third threshold liquid level, the regulating valve is closed automatically; when municipal administration pressure is less than the negative pressure lower limit, the governing valve is closed, and when the detected value of level gauge low to first threshold value liquid level, the governing valve is full-open and is intake.
5. The water age control system for a secondary water supply facility according to claim 1, wherein when the intelligent analysis engine determines that the water property is a peak period through the predicted water usage pattern curve, the controller controls the regulating valve to be closed, adjusts the period of the peak period according to an instruction of an upper computer, and when a detection value of the liquid level meter is as low as a first threshold liquid level, the regulating valve is fully opened to supply water.
6. The water age control system for a secondary water supply facility according to claim 1, wherein when the smart analysis engine determines the water usage property as the night water storage period through the predicted water usage pattern curve, the controller controls the opening of the regulating valve to ensure that the water tank is in a full water state before the night water storage period is finished.
7. The water age control system for secondary water supply equipment as claimed in claim 1, wherein the water storage curve of the water tank is calculated according to the water consumption mode curve, and the water intake curve of the water tank obtained according to the water storage curve and the water consumption mode curve is specifically: and (3) assuming that the current water storage capacity of the water tank can only meet the water consumption in the future K hours, obtaining a water storage capacity curve of the water tank based on the sum of the current water storage capacity of the water tank and the water consumption in the future K hours, and obtaining a water inflow curve according to the current water inflow which is the next-moment water storage capacity- (the current water storage capacity-the current water consumption).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111340316A (en) * | 2020-05-18 | 2020-06-26 | 浙江和达科技股份有限公司 | Intelligent water supply management method and system |
| CN112465188A (en) * | 2020-11-03 | 2021-03-09 | 上海威派格智慧水务股份有限公司 | Water consumption peak period analysis system and method |
| CN112508374A (en) * | 2020-11-27 | 2021-03-16 | 熊猫智慧水务有限公司 | Peak regulation control method and device based on water use curve |
| CN112949221A (en) * | 2021-03-04 | 2021-06-11 | 熊猫智慧水务有限公司 | Faucet water age analysis method |
| CN113812851A (en) * | 2021-09-09 | 2021-12-21 | 熊猫智慧水务有限公司 | Water age control system for direct drinking water purification equipment |
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| CN112949221A (en) * | 2021-03-04 | 2021-06-11 | 熊猫智慧水务有限公司 | Faucet water age analysis method |
| CN113812851A (en) * | 2021-09-09 | 2021-12-21 | 熊猫智慧水务有限公司 | Water age control system for direct drinking water purification equipment |
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