CN115597238A - Water temperature control method and device for water consumption equipment - Google Patents
Water temperature control method and device for water consumption equipment Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/215—Temperature of the water before heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/219—Temperature of the water after heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/238—Flow rate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
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Abstract
The invention provides a water temperature control method and a water temperature control device for water using equipment, wherein the water temperature control method for the water using equipment comprises the following steps: acquiring a water inflow curve, a water outlet temperature curve and a preset water outlet temperature of target water using equipment, and respectively calculating to obtain a current water inflow change rate and a current water outlet temperature fluctuation amount based on the water inflow curve, the water outlet temperature curve and the preset water outlet temperature; when the current water inflow change rate is larger than a water inflow change threshold and the current water outlet temperature fluctuation amount is larger than a water outlet temperature fluctuation threshold, correcting a heating power function of the target water using equipment; and controlling the target water equipment to heat according to the corrected target heating power function. The heating power function is effectively corrected according to the current water inflow change rate and the current water outlet temperature fluctuation amount, so that the water outlet temperature of the target water using equipment is effectively adjusted, the water temperature is kept stable, the heating performance of the water using equipment is improved, and the experience of a user is greatly improved.
Description
Technical Field
The invention relates to the field of control, in particular to a water temperature control method and device for water consumption equipment.
Background
The water using equipment with the heating function collects inflow water flow signals through a water flow sensor and collects outflow water temperature signals in real time through an outflow water temperature probe. The heating principle of the water using equipment is easy to know, the fluctuation of the water inlet flow of the water using equipment can inevitably cause the fluctuation of the water outlet temperature, and the existing water temperature control method can carry out filtering treatment on collected water flow signals, namely, the fluctuation of the water inlet flow in a small range is shielded, so that the water flow signals are kept constant in a certain range, and the water outlet temperature is kept stable. However, the control method has obvious defects, when the fluctuation of the inflow water flow exceeds the preset fluctuation range, the filtering control will be invalid, the constant-temperature water outlet cannot be ensured, and the user experience is greatly reduced.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that the filtration control fails and the constant-temperature water outlet cannot be ensured due to the fact that the fluctuation of the inflow water flow exceeds the preset fluctuation range in the prior art, and the user experience is greatly reduced, so that the water temperature control method and the water temperature control device for the water using equipment are provided.
According to a first aspect, an embodiment of the present invention provides a water temperature control method for a water using device, the method including:
acquiring a water inflow curve, a water outlet temperature curve and a preset water outlet temperature of target water using equipment, and respectively calculating to obtain a current water inflow change rate and a current water outlet temperature fluctuation amount based on the water inflow curve, the water outlet temperature curve and the preset water outlet temperature;
when the current water inflow change rate is greater than a water inflow change threshold and the current water outlet temperature fluctuation amount is greater than a water outlet temperature fluctuation threshold, correcting a heating power function of the target water utilization equipment based on the water inflow curve and the water outlet temperature curve;
and controlling the target water equipment to heat according to the corrected target heating power function.
Optionally, the modifying the heating power function of the target water utilization device based on the inflow water flow curve and the outflow water temperature curve includes:
extracting the current water inlet flow and the current water outlet temperature from the water inlet flow curve and the water outlet temperature curve respectively;
acquiring a first fluctuation period closest to the current moment based on the inflow curve, wherein the first fluctuation period is the time length of the inflow meeting the inflow fluctuation condition;
acquiring a second fluctuation period closest to the current moment based on the effluent temperature curve, wherein the second fluctuation period is the time length of the effluent temperature meeting the effluent temperature fluctuation condition;
and correcting the heating power function based on the current inflow, the current outflow temperature, the first fluctuation period and the second fluctuation period.
Optionally, the modifying the heating power function based on the current inflow rate, the current outflow temperature, the first fluctuation period, and the second fluctuation period includes:
determining a maximum time range corresponding to the first fluctuation period and the second fluctuation period as a target fluctuation period;
constructing a heating power correction function based on the current inflow, the current outflow temperature and the target fluctuation period;
and correcting the heating power function by using the heating power correction function.
Optionally, the formula of the heating power correction function is as follows:
wherein, T 3 A target fluctuation period; t is the current time; q (t) is the current inflow rate; k (t) is the current effluent temperature; k Setting up Presetting the outlet water temperature of target water using equipment; c Water (W) Is the specific heat capacity of water.
Optionally, the obtaining of the inflow curve and the outflow curve of the target water using device includes:
monitoring the inflow and outflow water temperature of the target water using equipment;
and respectively generating a water inlet flow curve and a water outlet temperature curve based on the relationship between the water inlet flow and the water outlet temperature and the time.
Optionally, the method further comprises:
and when the water inflow change rate is not greater than the water inflow change threshold value, or the water outlet temperature fluctuation amount is not greater than the water outlet temperature fluctuation threshold value, returning to the step of obtaining the water inflow curve and the water outlet temperature curve of the target water using equipment, and respectively calculating to obtain the current water inflow change rate and the current water outlet temperature fluctuation amount based on the water inflow curve and the water outlet temperature curve.
Optionally, the controlling the target water-using device to heat according to the corrected target heating power function includes:
calculating according to the corrected target heating power function to obtain target power;
and controlling the target water using equipment to heat at the target power.
According to a second aspect, an embodiment of the present invention provides a water temperature control apparatus for a water consumer, the apparatus including:
the calculation module is used for acquiring a water inflow curve, a water outlet temperature curve and a preset water outlet temperature of target water utilization equipment, and respectively calculating to obtain a current water inflow change rate and a current water outlet temperature fluctuation amount based on the water inflow curve, the water outlet temperature curve and the preset water outlet temperature;
the correction module is used for correcting the heating power function of the target water utilization equipment based on the inflow curve and the outflow curve when the current inflow change rate is greater than the inflow change threshold and the current outflow fluctuation amount is greater than the outflow fluctuation threshold;
and the control module is used for controlling the target water equipment to heat according to the corrected target heating power function.
According to a third aspect, embodiments of the present invention provide an electronic device, comprising:
a memory and a processor, the memory and the processor being communicatively coupled, wherein the memory stores computer instructions, and the processor executes the computer instructions to perform the method of the first aspect, or any one of the optional embodiments of the first aspect.
According to a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores computer instructions for causing a computer to execute the method described in the first aspect, or any one of the optional implementation manners of the first aspect.
The technical scheme of the invention has the following advantages:
according to the water temperature control method and the water temperature control device for the water consumption equipment, the current water inflow change rate and the current water outlet temperature fluctuation amount are respectively calculated and obtained through acquiring the water inflow curve, the water outlet temperature curve and the preset water outlet temperature of the target water consumption equipment on the basis of the water inflow curve, the water outlet temperature curve and the preset water outlet temperature; when the current water inflow change rate is larger than a water inflow change threshold and the current water outlet temperature fluctuation amount is larger than a water outlet temperature fluctuation threshold, correcting a heating power function of the target water utilization equipment based on the water inflow curve and the water outlet temperature curve; and controlling the target water equipment to heat according to the corrected target heating power function. The current water inflow change rate and the current water outlet temperature fluctuation quantity are respectively calculated based on the water inflow curve, the water outlet temperature curve and the preset water outlet temperature, and are compared with respective corresponding threshold values, when the current water inflow change rate and the current water outlet temperature fluctuation quantity are both larger than the respective threshold values, the heating power function of the target water using equipment is corrected, the target water using equipment is controlled to be heated by the corrected target heating power function, the situation that the target water using equipment cannot guarantee water outlet at a constant temperature due to large water inflow fluctuation is greatly reduced, meanwhile, the heating power function is further effectively corrected according to the current water inflow change rate and the current water outlet temperature fluctuation quantity, effective adjustment of the water outlet temperature of the target water using equipment is achieved, the water temperature is kept stable, the heating performance of the water using equipment is improved, and the experience feeling of a user is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a water temperature control method for a water utility according to an embodiment of the present invention;
FIG. 2 is a graph of the real-time water inlet flow rate according to an embodiment of the present invention;
FIG. 3 is a real-time outlet water temperature profile according to an embodiment of the present invention;
FIG. 4 is a logic diagram of water temperature control of a water consuming device according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a water temperature control device of a water consuming apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to 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" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be connected through the inside of the two elements, or may be connected wirelessly or through a wire. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment of the invention provides a water temperature control method of water using equipment, which specifically comprises the following steps of:
step S101: and acquiring a water inflow curve, a water outlet temperature curve and a preset water outlet temperature of the target water using equipment, and respectively calculating to obtain a current water inflow change rate and a current water outlet temperature fluctuation amount based on the water inflow curve, the water outlet temperature curve and the preset water outlet temperature.
Specifically, in practical application, the embodiment of the invention firstly calculates the current water inflow change rate and the current fluctuation amount of the water outlet temperature, so as to better adjust the water outlet temperature of the target water using equipment and establish data support for ensuring the stability of the water outlet temperature.
Specifically, the current water inflow rate of change can be calculated and determined according to the current water inflow and a preset water inflow, wherein the water inflow curve is a functional relation q (t) of the water inflow q and the time t, the water inflow rate of change can be obtained by calculating a first derivative q ' (t) of the functional relation q (t) of the water inflow q and the time t, that is, the water inflow rate of change is q ' (t), and the current water inflow rate of change is a corresponding water inflow rate q ' (t) value at the current moment. It should be noted that, the functional relation q (t) between the inflow rate q and the time t is related to various factors such as the target water consumption equipment, the environmental conditions, and the user requirements, and therefore, the function is not specifically limited.
Specifically, the current fluctuation Δ K of the leaving water temperature may be calculated and determined according to the current leaving water temperature and a preset leaving water temperature, wherein the leaving water temperature curve is a functional relation K (t) of the leaving water temperature K and time t, and a calculation formula of the current fluctuation Δ K of the leaving water temperature is as follows:
ΔK＝K(t1)-K setting up (1)
Wherein, delta K is the fluctuation amount of the current effluent temperature; k (t 1) is the water outlet temperature corresponding to the current time t 1; k Setting up The preset outlet water temperature of the target water using equipment is obtained.
It should be noted that, the inlet and outlet water temperature curve is a function relationship between the outlet water temperature K and the time t, and is related to various factors such as the target water usage equipment, the environmental conditions, and the user requirements, and therefore, the function is not specifically limited.
The embodiment of the present invention is described by taking a gas water heater as an example, but the actual situation is not limited to this, and the target water consumption equipment may be any water consumption equipment with a heating function.
Step S102: and when the current water inflow change rate is greater than the water inflow change threshold and the current water outlet temperature fluctuation amount is greater than the water outlet temperature fluctuation threshold, correcting the heating power function of the target water using equipment based on the water inflow curve and the water outlet temperature curve.
Specifically, in practical application, when the current water inflow change rate is greater than the water inflow change threshold and the current water outflow temperature fluctuation amount is greater than the water outflow temperature fluctuation threshold, it can be determined that the water inflow fluctuation is too large at the moment, and the water outflow temperature is correspondingly influenced by the water inflow fluctuation, so that the constant water temperature of the target water using equipment cannot be ensured, and the heating power function of the target water using equipment needs to be corrected in time, so that the fluctuation change of the water inflow is adapted, and the water demand of a user on the target water using equipment is ensured.
For example, the water inflow change threshold may be 0.10, but the actual situation is not limited thereto, the water inflow change threshold is set according to a water flow fluctuation range of the user obtained through a collected user sample, and a value obtained by integrating the precision of the water flow sensor is considered, generally, the value range of the water inflow change threshold may be 0.05 to 0.15, so that the target water utilization equipment can be effectively adjusted while the accuracy of the water inflow data is ensured, and the constant temperature water outflow effect is ensured.
Exemplary leaving water temperature fluctuation threshold K Threshold value The temperature of the outlet water can be 2 ℃, but the actual situation is not limited to the temperature, the outlet water temperature fluctuation threshold value is set according to a numerical value obtained comprehensively after the somatosensory influence of the water temperature fluctuation on a user is considered and the requirement on the water temperature fluctuation in the product standard is met, generally, the value range of the outlet water temperature fluctuation threshold value can be 1-3 ℃, so that the outlet water temperature fluctuation is effectively reduced, and the constant-temperature outlet water effect is ensured.
Step S103: and controlling the target water equipment to heat according to the corrected target heating power function.
Specifically, in practical application, the embodiment of the invention controls the target water using equipment to heat according to the corrected target heating power function, so that on the premise of ensuring accurate data of water inlet flow and water outlet temperature, fluctuation of the water outlet temperature is effectively reduced, heating performance of the target water using equipment is improved, and use requirements of users are further met.
By executing the above steps, according to the water temperature control method for the water consumption device provided by the embodiment of the invention, the current water inflow change rate and the current water outflow fluctuation amount are respectively calculated based on the water inflow curve, the water outflow curve and the preset water outflow temperature, and are compared with the respective corresponding threshold values, when the current water inflow change rate and the current water outflow fluctuation amount are both greater than the respective threshold values, the heating power function of the target water consumption device is corrected, so that the target water consumption device is controlled to be heated by the corrected target heating power function, the situation that the target water consumption device cannot ensure water outflow at a constant temperature due to the large fluctuation of the water inflow is greatly reduced, meanwhile, the heating power function is effectively corrected according to the current water inflow change rate and the current water outflow fluctuation amount, the effective regulation of the water outflow temperature of the target water consumption device is realized, the water temperature is kept stable, the heating performance of the water consumption device is improved, and the experience of users is greatly improved.
Specifically, in an embodiment, the step S101 of obtaining the inflow water curve and the outflow water temperature curve of the target water consumption device specifically includes the following steps:
step S201: and monitoring the inflow and the outflow temperature of the target water using equipment.
Step S202: and respectively generating a water inlet flow curve and a water outlet temperature curve based on the relation between the water inlet flow and the water outlet temperature and the time.
Specifically, in practical applications, taking a gas water heater as an example, in a heating process of the gas water heater, a curve image of fluctuation of inlet water flow and outlet water temperature shows a curve characteristic similar to a sine (cosine) function, and when an external condition changes suddenly, the curve image changes suddenly. The dynamic mathematical model can be established by acquiring the water inflow and the water outflow temperature in real time.
Specifically, in practical application, in order to avoid data interference, the embodiment of the invention first performs basic filtering processing on the acquired real-time data, so as to correspondingly generate an inflow water flow curve and an outflow water temperature curve. Illustratively, data of the current water inflow change rate within plus or minus 0.1L/min and the current water outlet temperature fluctuation quantity (namely the difference between the current water outlet temperature and a preset water outlet temperature fluctuation threshold value) within plus or minus 0.1 ℃ within the sampling time t0 are equivalent to no fluctuation for carrying out fluctuation shielding, and the curve image is smooth through filtering processing, so that a data base is laid for better carrying out water temperature control on target water utilization equipment. The t0 may be a minimum time unit preset by a program, and exemplarily, the value range of the t0 may be 0ms to 1000ms, but the actual situation is not limited thereto, and the value change of the value range of the sampling time t0 is performed to avoid data interference and further accurately and efficiently obtain the inflow water flow rate curve and the outflow water flow rate curve, which is also within the protection range of the water temperature control method of the water device provided by the embodiment of the present invention.
In the embodiment of the invention, the inflow water flow signal of the target water using equipment is monitored by the water flow sensor, and a real-time inflow water flow curve is drawn as shown in figure 2. The embodiment of the invention can timely and efficiently adjust the heating power of the target water using equipment by extracting the data in the real-time inflow curve while visually reflecting the fluctuation condition of the inflow water, thereby obtaining the inflow water condition of the target water using equipment at the first time and correspondingly reacting, and ensuring the stability of the outflow water temperature to the maximum extent.
Specifically, in practical application, the embodiment of the invention monitors the outlet water temperature signal of the target water using equipment through the outlet water temperature probe, and draws a real-time outlet water temperature curve as shown in fig. 3. Compared with the prior art that the inlet water flow is ensured to be constant within a certain range only by shielding the inlet water flow fluctuation condition within a smaller range, the control method ensures the outlet water temperature to be constant, the embodiment of the invention monitors the inlet water flow in real time, monitors the outlet water temperature in real time, calculates the current inlet water flow change rate and the current outlet water temperature fluctuation amount for follow-up, corrects the heating power function in real time when the current inlet water flow change rate is greater than the inlet water flow change threshold and the current outlet water temperature fluctuation amount is greater than the outlet water temperature fluctuation threshold, and controls the target water using equipment to the maximum extent, as shown in fig. 3, and the control effect is very obvious.
Specifically, in an embodiment, the step S102 corrects the heating power function of the target water using device based on the inflow water flow curve and the outflow water temperature curve, and specifically includes the following steps:
step S301: and extracting the current inlet water flow and the current outlet water temperature from the inlet water flow curve and the outlet water temperature curve respectively.
Step S302: and acquiring a first fluctuation period closest to the current moment based on the inflow curve, wherein the first fluctuation period is the time length of the inflow meeting the inflow fluctuation condition.
Step S303: and acquiring a second fluctuation period closest to the current moment based on the outlet water temperature curve, wherein the second fluctuation period is the time length of the outlet water temperature meeting the outlet water temperature fluctuation condition.
Step S304: and correcting the heating power function based on the current inflow, the current outflow temperature, the first fluctuation period and the second fluctuation period.
Specifically, in practical application, the embodiment of the present invention obtains a group of continuous smooth curves according to the filtered water inlet flow and water outlet temperature, obtains their respective derivative function curves by respectively deriving from each point on the water inlet flow curve and the water outlet temperature curve, further obtains their respective inflection points and each fluctuation period, and corrects the heating power in the next fluctuation period by calculating the characteristic of the curve in the last fluctuation period.
Specifically, in practical application, considering that a section of continuous curve image always has a corresponding "peak" and/or a corresponding "trough" in a closed interval, and the "peak" and/or the "trough" most probably satisfy an inflow water flow fluctuation condition or an outflow water temperature fluctuation condition, the "peak" and/or the "trough" of the section of continuous curve in a certain closed interval range can be judged, and when the position satisfies the inflow water flow fluctuation condition, the curve can be judged to have a first fluctuation period in the closed interval; when the temperature fluctuation condition of the outlet water is met, the curve can be judged to have a second fluctuation period in the closed interval. Therefore, the fluctuation cycle can be determined by the time ranges corresponding to two adjacent "peaks" or two "troughs", but the practical situation is not limited to this, the first/second fluctuation cycle may be smaller than the time ranges corresponding to two adjacent "peaks" or two "troughs", and the change of the determination of the fluctuation cycle is performed by enlarging or reducing the time ranges determined by two adjacent "peaks" or two "troughs" to realize the real-time accurate correction of the heating power function, and is also within the protection range of the water temperature control method of the water equipment provided by the embodiment of the invention.
For example, when the second fluctuation period is determined, if the two "peaks" respectively correspond to time 5 points 10 minutes 30 seconds and time 5 points 10 minutes 33 seconds and satisfy the fluctuation condition of the leaving water temperature, at this time, the second fluctuation period may be 3s, and also, two time nodes corresponding to the leaving water temperature that just satisfies the fluctuation condition of the leaving water temperature may be found, the time nodes 5 points 10 minutes 31 seconds and time 5 points 10 minutes 32 seconds, and the second fluctuation period may be 1s.
It should be noted that the fluctuation period in the embodiment of the present invention is not a period strictly defined by the periodic function, and because a continuous curve image always has a maximum value in its closed interval, and the fluctuation curve image has an obvious oscillation characteristic, 2 connected peaks or troughs can be approximately regarded as a fluctuation period, and the specific value of the period also changes at any time along with the fluctuation of the curve.
Specifically, in practical application, according to the intake flow curve after filtering, 2 connected wave crests or wave troughs nearest to the current moment are regarded as a first fluctuation period, wherein the intake flow in the first fluctuation period meets the intake flow fluctuation condition, namely the intake flow change rate is greater than the intake change threshold; and according to the outlet water temperature curve after filtering treatment, taking 2 connected wave crests or wave troughs nearest to the current moment as a second fluctuation period, wherein the outlet water temperature in the second fluctuation period meets the outlet water temperature fluctuation condition, namely the outlet water temperature fluctuation amount is larger than the outlet water temperature fluctuation threshold value.
According to the embodiment of the invention, the first fluctuation period and the second fluctuation period are respectively determined, and the water inflow and the change condition of the water outlet temperature are fully mastered, so that the heating power function is corrected according to the current water inflow, the current water outlet temperature, the first fluctuation period and the second fluctuation period, on the premise of ensuring the accuracy of data, the real-time correction of the heating power function is realized, the stability of the water outlet temperature is ensured to the greatest extent, and the use requirements of users are met.
Specifically, in an embodiment, the step S304 specifically includes the following steps:
step S401: and determining the maximum time range corresponding to the first fluctuation period and the second fluctuation period as a target fluctuation period.
Illustratively, the first fluctuation period is 2s, the second fluctuation period is 3s, and the target fluctuation period is determined to be 3s by taking the maximum value of the two.
Specifically, in practical applications, in order to ensure that the target fluctuation period may include both a first fluctuation period and a second fluctuation period, the embodiment of the present invention may determine the target fluctuation period by looking at the inflow rate curve to determine the start time of the first fluctuation period and the end time of the second fluctuation period, and illustratively, the start time of the first fluctuation period is 5 points, 10 minutes and 31 seconds, and the end time is 5 points, 10 minutes and 35 seconds; the starting time of the second fluctuation period is 5 points, 10 minutes and 36 seconds, and the ending time of the second fluctuation period is 5 points, 10 minutes and 39 seconds, so that the target fluctuation period can be determined to be 8 seconds from 5 points, 10 minutes and 31 seconds to 5 points, 10 minutes and 39 seconds.
Specifically, in practical application, because the inlet water flow curve and the outlet water temperature curve are not in a linear relationship, the embodiment of the invention determines the first fluctuation period and the second fluctuation period respectively, and determines the maximum time range corresponding to the first fluctuation period and the second fluctuation period as the target fluctuation period on the basis, so that the whole fluctuation period can be covered, the heating power function is corrected according to the target fluctuation period, the outlet water temperature is ensured to be stable, and the user experience is greatly improved.
Step S402: and constructing a heating power correction function based on the current inflow, the current outflow temperature and the target fluctuation period.
Step S403: and correcting the heating power function by using the heating power correction function.
Specifically, in practical applications, the embodiment of the present invention modifies the heating power function, wherein the formula of the heating power modification function is as follows:
wherein, T 3 A target fluctuation period; t is the current time; q (t) is the current inflow rate; k (t) is the current effluent temperature; k Setting up Presetting the outlet water temperature of target water using equipment; c Water (W) Is the specific heat capacity of water.
At this time, the heating power function will change as:
P′ heating of ＝P Heating of +P Correction (3)
Wherein, P' Heating of Is a modified target heating power function; p Heating of As a function of the current heating power when not corrected; p Correction Is a heating power correction function.
The embodiment of the invention updates and iterates based on real-time data, and can modify the heating power function to the maximum extent, thereby effectively reducing the fluctuation of the outlet water temperature, keeping the water temperature stable, improving the heating performance of the target water using equipment, and greatly improving the user experience.
Specifically, in an embodiment, the step S103 controls the target water-using equipment to heat according to the corrected target heating power function, and specifically includes the following steps:
step S501: and calculating to obtain the target power according to the corrected target heating power function.
Step S502: and controlling the target water using equipment to heat at the target power.
Specifically, in practical application, after the target heating power function is determined, the target power is calculated according to the real-time data and the target heating power function, and the target water using equipment is heated by the target power, so that the use requirement of a user is met.
Specifically, in an embodiment, the method specifically includes the following steps:
step S601: and when the change rate of the water inflow is not greater than the change threshold of the water inflow, or the fluctuation quantity of the water outlet temperature is not greater than the fluctuation threshold of the water outlet temperature, returning to the step S101 to obtain a water inflow curve and a water outlet temperature curve of the target water using equipment, and respectively calculating to obtain the current change rate of the water inflow and the current fluctuation quantity of the water outlet temperature based on the water inflow curve and the water outlet temperature curve.
Specifically, in practical application, when the water inflow change rate is not greater than the water inflow change threshold, or the water outlet temperature fluctuation amount is not greater than the water outlet temperature fluctuation threshold, it can be determined that the current working state of the target water using equipment can meet the use requirements of users.
The following describes a water temperature control method for a water device according to an embodiment of the present invention in detail with reference to specific application examples.
According to the existing filtering control scheme, when the water inflow change rate exceeds 0.10, filtering control fails, as shown in fig. 3, the water temperature control effect is poor at the moment, and the use feeling of a user is seriously influenced. Aiming at the defects in the prior art, the embodiment of the invention provides a water temperature control method of water using equipment, which comprises the following specific implementation processes:
with reference to fig. 1-4, it is obtained that the current water inflow rate of change q ' (t) is 0.15, the outlet water temperature of the gas water heater fluctuates greatly, the current outlet water temperature fluctuation Δ K =5, and q ' (t) is greater than the water inflow rate change threshold q ' (t) Threshold value Delta K is larger than the fluctuation threshold K of the water outlet temperature Threshold value At this time, the heating power function of the gas water heater is corrected. Calculated according to corrected target heating power function for gas water heaterThe target power is used for heating, and updating iteration is continuously carried out, so that the fluctuation of the outlet water temperature of the gas water heater is kept within a reasonable range (not exceeding +/-2 ℃), and as shown in figure 3, the water temperature control method of the water using equipment provided by the embodiment of the invention achieves an ideal water temperature control effect and meets the use requirements of users.
Due to the current water inflow rate of change q '(t) and the water inflow change threshold q' (t) Threshold value The units are consistent and are L/s 2 Or kg/s 2 Or L/min 2 Or kg/min 2 Or L/(min. T0), wherein t0 is the minimum time unit preset by the program, t0 is ms, the value range is 0-1000, and the current fluctuation quantity delta K of the water outlet temperature and the fluctuation threshold value K of the water outlet temperature Threshold value Accordingly, the above description is only illustrative of numerical values and does not refer to units in a cumulative manner.
When the fluctuation of the inflow water flow is too large, which causes the failure of the existing water flow signal filtering scheme, the control scheme of the invention is intervened, the heating power required by the working accumulation of the gas water heater in a fluctuation period is calculated, the average heating power is obtained, the heating is carried out with the corrected heating power, the heating power function is iteratively updated subsequently, and the gas water heater is controlled by the updated heating power function, so that the fluctuation of the outflow water temperature can be effectively and reliably reduced.
Generating a water inlet flow curve function q (t) and a water outlet temperature curve function K (t) by acquiring real-time numerical values of water inlet flow and water outlet temperature of target water using equipment in the using process; obtaining the fluctuation period T of the inflow water flow through a curve function q (T) 1 And calculating the current water inflow change rate q' (t); obtaining the fluctuation period T of the outlet water temperature through a curve function K (T) 2 And calculating the current water outlet temperature K and the preset water outlet temperature K of the target water using equipment Setting up The fluctuation quantity delta K of the current effluent temperature; when q '(t) > q' (t) Threshold value And Δ K > K Threshold value In the meantime, the heating power function P 'is corrected, at this time P' Heating of ＝P Heating is carried out +P Correction And continuously updating and iterating, effectively reducing the fluctuation of the outlet water temperature, keeping the water temperature stable, and improving the water qualityHigh target heating performance of water-using equipment.
An embodiment of the present invention provides a water temperature control device for a water consumption device, as shown in fig. 5, the water temperature control device for a water consumption device includes:
the calculating module 101 is configured to obtain a water inflow curve, a water outflow curve, and a preset water outflow temperature of the target water consumption device, and calculate a current water inflow change rate and a current water outflow fluctuation amount based on the water inflow curve, the water outflow curve, and the preset water outflow temperature. For details, refer to the related description of step S101 in the above method embodiment, and no further description is provided here.
And the correcting module 102 is configured to correct a heating power function of the target water equipment based on the inflow curve and the outflow curve when the current inflow change rate is greater than the inflow change threshold and the current outflow fluctuation amount is greater than the outflow fluctuation threshold. For details, refer to the related description of step S102 in the above method embodiment, and no further description is provided here.
And the control module 103 is used for controlling the target water-using equipment to heat according to the corrected target heating power function. For details, refer to the related description of step S103 in the above method embodiment, and details are not repeated herein.
For further description of the water temperature control device of the water consumption equipment, reference is made to the related description of the embodiment of the water temperature control method of the water consumption equipment, and details are not repeated herein.
Through the cooperative cooperation of the above components, the water temperature control device of the water consumption equipment provided by the embodiment of the invention calculates the current water inflow change rate and the current water outflow fluctuation amount respectively based on the water inflow curve, the water outflow curve and the preset water outflow temperature, compares the current water inflow change rate and the current water outflow fluctuation amount with the corresponding threshold values, corrects the heating power function of the target water consumption equipment when the current water inflow change rate and the current water outflow fluctuation amount are both larger than the corresponding threshold values, controls the target water consumption equipment to heat by the corrected target heating power function, greatly reduces the occurrence of the situation that the target water consumption equipment cannot ensure water outflow at a constant temperature due to large fluctuation of the water inflow, and further effectively corrects the heating power function according to the current water inflow change rate and the current water outflow fluctuation amount, realizes effective regulation of the water outflow temperature of the target water consumption equipment, keeps the water temperature stable, improves the heating performance of the water consumption equipment, and greatly improves the experience of users.
An embodiment of the present invention provides an electronic device, as shown in fig. 6, the electronic device includes a processor 901 and a memory 902, and the memory 902 and the processor 901 are communicatively connected to each other, where the processor 901 and the memory 902 may be connected by a bus or in another manner, and fig. 6 takes the connection by the bus as an example.
The memory 902, which is a non-transitory computer readable storage medium, may be used for storing non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the methods of the embodiments of the present invention. The processor 901 executes various functional applications and data processing of the processor 901 by executing non-transitory software programs, instructions and modules stored in the memory 902, that is, implements the methods in the above-described method embodiments.
The memory 902 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 901, and the like. Further, the memory 902 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 902 may optionally include memory located remotely from the processor 901, which may be connected to the processor 901 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
One or more modules are stored in the memory 902, which when executed by the processor 901 perform the methods in the above-described method embodiments.
The specific details of the electronic device may be understood by referring to the corresponding related descriptions and effects in the above method embodiments, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, and the implemented program can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A water temperature control method for a water using device is characterized by comprising the following steps:
acquiring a water inflow curve, a water outlet temperature curve and a preset water outlet temperature of target water using equipment, and respectively calculating to obtain a current water inflow change rate and a current water outlet temperature fluctuation amount based on the water inflow curve, the water outlet temperature curve and the preset water outlet temperature;
when the current water inflow change rate is larger than a water inflow change threshold and the current water outlet temperature fluctuation amount is larger than a water outlet temperature fluctuation threshold, correcting a heating power function of the target water utilization equipment based on the water inflow curve and the water outlet temperature curve;
and controlling the target water equipment to heat according to the corrected target heating power function.
2. The method of claim 1, wherein modifying the heating power function of the target water utility based on the inlet water flow curve and the outlet water temperature curve comprises:
extracting the current water inlet flow and the current water outlet temperature from the water inlet flow curve and the water outlet temperature curve respectively;
acquiring a first fluctuation period which is nearest to the current moment based on the inflow rate curve, wherein the first fluctuation period is the time length of the inflow rate meeting the inflow rate fluctuation condition;
acquiring a second fluctuation period closest to the current moment based on the effluent temperature curve, wherein the second fluctuation period is the time length of the effluent temperature meeting the effluent temperature fluctuation condition;
and correcting the heating power function based on the current inflow, the current outflow temperature, the first fluctuation period and the second fluctuation period.
3. The method of claim 2, wherein modifying the heating power function based on the current influent water flow rate, the current effluent water temperature, the first fluctuation period, and the second fluctuation period comprises:
determining a maximum time range corresponding to the first fluctuation period and the second fluctuation period as a target fluctuation period;
constructing a heating power correction function based on the current inflow, the current outflow temperature and the target fluctuation period;
and correcting the heating power function by using the heating power correction function.
4. A method according to claim 3, characterized in that the formula of the heating power correction function is as follows:
wherein, T 3 A target fluctuation period; t is the current time; q (t) is the current inflow rate; k (t) is the current effluent temperature; k Setting up Presetting the outlet water temperature of target water using equipment; c Water (W) Is the specific heat capacity of water.
5. The method of claim 1, wherein the obtaining the inlet water flow curve and the outlet water temperature curve of the target water consumer comprises:
monitoring the inflow and outflow water temperature of the target water using equipment;
and respectively generating a water inlet flow curve and a water outlet temperature curve based on the relationship between the water inlet flow and the water outlet temperature and the time.
6. The method of claim 1, further comprising:
and when the change rate of the water inflow is not more than the change threshold of the water inflow, or the fluctuation quantity of the water outlet temperature is not more than the fluctuation threshold of the water outlet temperature, returning to the step of obtaining the water inflow curve and the water outlet temperature curve of the target water using equipment, and respectively calculating to obtain the current change rate of the water inflow and the current fluctuation quantity of the water outlet temperature based on the water inflow curve and the water outlet temperature curve.
7. The method of claim 1, wherein controlling the target water-using device to heat according to the modified target heating power function comprises:
calculating according to the corrected target heating power function to obtain target power;
and controlling the target water using equipment to heat at the target power.
8. A water temperature control apparatus for a water using device, comprising:
the calculation module is used for acquiring a water inlet flow curve, a water outlet temperature curve and a preset water outlet temperature of target water utilization equipment, and respectively calculating to obtain a current water inlet change rate and a current water outlet temperature fluctuation amount based on the water inlet flow curve, the water outlet temperature curve and the preset water outlet temperature;
the correction module is used for correcting the heating power function of the target water utilization equipment based on the inflow curve and the outflow curve when the current inflow change rate is greater than the inflow change threshold and the current outflow fluctuation amount is greater than the outflow fluctuation threshold;
and the control module is used for controlling the target water equipment to heat according to the corrected target heating power function.
9. An electronic device, comprising:
a memory and a processor communicatively coupled to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of any of claims 1-7.
10. A computer-readable storage medium having stored thereon computer instructions for causing a computer to perform the method of any one of claims 1-7.
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