CN115597238B - Water temperature control method and device for water using equipment - Google Patents
Water temperature control method and device for water using equipment Download PDFInfo
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- CN115597238B CN115597238B CN202211279125.3A CN202211279125A CN115597238B CN 115597238 B CN115597238 B CN 115597238B CN 202211279125 A CN202211279125 A CN 202211279125A CN 115597238 B CN115597238 B CN 115597238B
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- 238000010438 heat treatment Methods 0.000 claims abstract description 102
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Classifications
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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
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
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Abstract
The invention provides a water temperature control method and a water temperature control device of water equipment, wherein the water temperature control method of the water equipment comprises the following steps: acquiring a water inlet flow curve, a water outlet temperature curve and a preset water outlet temperature of target water using equipment, and respectively calculating to obtain the current water inlet change rate and the current water outlet temperature fluctuation based on the water inlet flow curve, the water outlet temperature curve and the preset water outlet temperature; when the current water inflow change rate is larger than the water inflow change threshold and the current water outlet temperature fluctuation is larger than the water outlet temperature fluctuation threshold, correcting a heating power function of the target water using equipment; and controlling the target water using equipment to heat according to the corrected target heating power function. Through carrying out effective correction to the heating power function according to current inflow rate and current outlet water temperature fluctuation volume, realize the effective regulation to the water temperature of target water using equipment, keep the temperature stable, improve the heating performance of water using equipment, promote user's experience by a wide margin.
Description
Technical Field
The invention relates to the field of control, in particular to a water temperature control method and device of water using equipment.
Background
The water using equipment with the heating function is mainly characterized in that a water flow sensor is used for collecting water inflow signals, and a water outlet temperature probe is used for collecting water outlet temperature signals in real time. The heating principle of the water using equipment is easy to know, fluctuation of water inlet flow of the water using equipment can inevitably lead to fluctuation of water outlet temperature, and the existing water temperature control method can carry out filtering treatment on collected water flow signals, namely, shield fluctuation of water inlet flow in a smaller range, 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 that when the fluctuation of the inflow water flow exceeds the preset fluctuation range, the filtering control is invalid, the constant-temperature outflow water cannot be ensured, and the user experience is greatly reduced.
Disclosure of Invention
Therefore, the invention aims to overcome the defects that the constant-temperature water outlet cannot be ensured due to the failure of filtering control caused by overlarge fluctuation of the water inlet flow beyond the preset fluctuation range in the prior art and the user experience is greatly reduced, thereby providing the water temperature control method and the water temperature control device of the water using equipment.
According to a first aspect, an embodiment of the present invention provides a water temperature control method of a water using apparatus, the method including:
acquiring a water inlet flow 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 inlet change rate and a current water outlet temperature fluctuation based on the water inlet flow 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 based on the water inflow curve and the water outlet temperature curve;
and controlling the target water using equipment to heat according to the corrected target heating power function.
Optionally, the correcting the heating power function of the target water using device based on the inflow rate curve and the outflow temperature curve includes:
extracting current water inflow and current water outflow temperature from the water inflow curve and the water outflow temperature curve respectively;
Acquiring a first fluctuation period closest to the current moment based on the water inflow curve, wherein the first fluctuation period is the time length of the water inflow meeting the water inflow fluctuation condition;
acquiring a second fluctuation period closest to the current moment based on the water outlet temperature curve, wherein the second fluctuation period is the time length of the water outlet temperature meeting the water outlet temperature fluctuation condition;
And correcting the heating power function based on the current water inflow, the current water outflow temperature, the first fluctuation period and the second fluctuation period.
Optionally, the correcting the heating power function based on the current inflow, 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 water inflow, the current water 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 is a target fluctuation period; t is the current moment; q (t) is the current water inflow; k (t) is the current outlet water temperature; k Setting up is the preset water outlet temperature of the target water using equipment; c Water and its preparation method is the specific heat capacity of water.
Optionally, the acquiring the inflow and outflow temperature curves of the target water using device includes:
monitoring the water inlet flow and the water outlet temperature of the target water using equipment;
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 time.
Optionally, the method further comprises:
and returning to the step of obtaining the water inflow curve and the water outflow temperature curve of the target water equipment when the water inflow change rate is not greater than the water inflow change threshold or the water outflow temperature fluctuation is not greater than the water outflow temperature fluctuation threshold, and respectively calculating the current water inflow change rate and the current water outflow temperature fluctuation based on the water inflow curve and the water outflow temperature curve.
Optionally, the controlling the target water using device to heat according to the modified target heating power function includes:
calculating to obtain target power according to the corrected target heating power function;
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 using device, the apparatus 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 the target water using equipment, and calculating to obtain the current water inlet change rate and the current water outlet temperature fluctuation based on the water inlet flow curve, the water outlet temperature curve and the preset water outlet temperature respectively;
The correction module is used for correcting the heating power function of the target water using equipment based on the water inlet flow curve and the water outlet temperature curve when the current water inlet change rate is larger than a water inlet change threshold and the current water outlet temperature fluctuation is larger than a water outlet temperature fluctuation threshold;
and the control module is used for controlling the target water using equipment to heat according to the corrected target heating power function.
According to a third aspect, an embodiment of the present invention provides an electronic device, including:
The system comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions, thereby executing the method in the first aspect or any optional implementation manner of the first aspect.
According to a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing computer instructions for causing a computer to perform the method of the first aspect, or any one of the alternative embodiments of the first aspect.
The technical scheme of the invention has the following advantages:
According to the water temperature control method and device for the water using equipment, the current water inflow change rate and the current water outflow temperature fluctuation are obtained by acquiring the water inflow flow curve, the water outflow temperature curve and the preset water outflow temperature of the target water using equipment and respectively calculating the current water inflow change rate and the current water outflow temperature fluctuation based on the water inflow flow curve, the water outflow temperature curve and the preset water outflow 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 based on the water inflow curve and the water outlet temperature curve; and controlling the target water using equipment to heat according to the corrected target heating power function. The current water inflow rate and the current water outflow temperature fluctuation are calculated respectively based on the water inflow rate curve, the water outflow temperature curve and the preset water outflow temperature, and compared with the corresponding thresholds, when the current water inflow rate and the current water outflow temperature fluctuation are both larger than the corresponding thresholds, the heating power function of the target water using device is corrected, the target water using device is controlled to be heated by the corrected target heating power function, the situation that the target water using device cannot guarantee water outflow at constant temperature due to large water inflow flow fluctuation is greatly reduced, meanwhile, the heating power function is effectively corrected according to the current water inflow rate and the current water outflow temperature fluctuation, the water temperature of the target water using device is effectively regulated, the water temperature stability is kept, the heating performance of the water using device is improved, and the experience 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 that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a water temperature control method of a water-using device according to an embodiment of the present invention;
FIG. 2 is a graph of real-time intake flow according to an embodiment of the present invention;
FIG. 3 is a graph of real-time effluent temperature profile according to an embodiment of the present invention;
FIG. 4 is a logic diagram of water temperature control of a water using apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a water temperature control device of a water-using 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 following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The embodiment of the invention provides a water temperature control method of water using equipment, as shown in figure 1, which specifically comprises the following steps:
Step S101: the method comprises the steps of obtaining a water inlet flow curve, a water outlet temperature curve and a preset water outlet temperature of target water using equipment, and respectively calculating to obtain the current water inlet change rate and the current water outlet temperature fluctuation based on the water inlet flow 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 water outlet temperature fluctuation, so as to better regulate the water outlet temperature of the target water using equipment and ensure the stability of the water outlet temperature, thereby laying a data support.
Specifically, the current water inflow rate can be calculated and determined according to the current water inflow and the preset water inflow, wherein a water inflow curve is a functional relation q (t) of the water inflow q and the time t, and the water inflow rate 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, namely, the water inflow rate is q ' (t), and the current water inflow rate is a water inflow rate q ' (t) value corresponding to the current moment. The functional relation q (t) between the inflow rate q and the time t is not particularly limited, since it relates to various factors such as the target water device, the environmental conditions, and the user demand.
Specifically, the current water outlet temperature fluctuation amount Δk may be calculated and determined according to the current water outlet temperature and a preset water outlet temperature, where the water outlet temperature curve is a functional relation K (t) between the water outlet temperature K and the time t, and the calculation formula of the current water outlet temperature fluctuation amount Δk is as follows:
ΔK＝K(t1)-K Setting up (1)
Wherein ΔK is the current outlet water temperature fluctuation; k (t 1) is the water outlet temperature corresponding to the current time t 1; k Setting up is the preset outlet water temperature of the target water using equipment.
The water inlet/outlet temperature curve is a functional relationship between the water outlet temperature K and the time t, and is related to various factors such as the target water using device, the environmental condition, and the user's demand, and thus the function is not particularly limited.
The embodiment of the invention is described by taking a gas water heater as an example, but the actual situation is not limited to the gas water heater, and the target water using device can be any water using device with a heating function.
Step S102: when the current water inflow change rate is larger than the water inflow change threshold and the current water outlet temperature fluctuation amount is larger 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 outlet temperature fluctuation is greater than the water outlet temperature fluctuation threshold, it can be determined that the water inflow fluctuation is too large at this time, the water outlet temperature is correspondingly affected by the water inflow fluctuation, the water temperature of the target water using device cannot be ensured to be constant, and the heating power function of the target water using device needs to be corrected in time, so that the fluctuation change of the water inflow is adapted, and the water using requirement of a user on the target water using device is ensured.
The water inflow change threshold value can be 0.10 in an exemplary manner, but the actual situation is not limited to the water inflow change threshold value, the setting basis of the water inflow change threshold value is the water flow fluctuation range of a user obtained through collected user samples, and the value obtained by comprehensively considering the accuracy of a water flow sensor is generally 0.05-0.15, so that the water inflow data is ensured to be accurate, and meanwhile, the target water using equipment can be effectively regulated, and the constant-temperature water outlet effect is ensured.
The water outlet temperature fluctuation threshold K Threshold value may be 2 ℃, but the actual situation is not limited thereto, and the setting basis of the water outlet temperature fluctuation threshold is a value comprehensively obtained after considering the influence of water temperature fluctuation on the body feeling of the user and having to meet the requirement on water temperature fluctuation in the product standard, generally, the value range of the water outlet temperature fluctuation threshold may be 1-3 ℃, thereby effectively reducing the water outlet temperature fluctuation and ensuring the constant-temperature water outlet effect.
Step S103: and controlling the target water using 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, effectively reduces fluctuation of the water outlet temperature on the premise of ensuring accurate water inlet flow and water outlet temperature data, improves the heating performance of the target water using equipment, and further meets the use requirement of a user.
According to the water temperature control method for the water using equipment, the current water inflow change rate and the current water outflow temperature fluctuation are calculated based on the water inflow curve, the water outflow temperature curve and the preset water outflow temperature respectively, and compared with the corresponding threshold values, when the current water inflow change rate and the current water outflow temperature fluctuation are both larger than the threshold values, the heating power function of the target water using equipment is corrected, the corrected target heating power function is used for controlling the target water using equipment to heat, the situation that the target water using equipment cannot guarantee water outflow at constant temperature due to large water inflow fluctuation is greatly reduced, meanwhile, the heating power function is effectively corrected according to the current water inflow change rate and the current water outflow temperature fluctuation, the water temperature of the target water using equipment is effectively adjusted, the water temperature stability is maintained, the heating performance of the water using equipment is improved, and the experience of a user is greatly improved.
Specifically, in an embodiment, the step S101 acquires a water inflow curve and a water outflow temperature curve of the target water using device, and specifically includes the following steps:
Step S201: and monitoring the water inlet flow and the water outlet temperature of the target water using equipment.
Step S202: based on the relation between the water inlet flow and the water outlet temperature and time, a water inlet flow curve and a water outlet temperature curve are respectively generated.
Specifically, in practical application, taking a gas water heater as an example, in the heating working process of the gas water heater, the curve image of the inflow water flow and the outflow water temperature can show curve characteristics similar to sine (cosine) functions, and when external conditions are suddenly changed, the curve image also suddenly changes. The dynamic mathematical model can be built by acquiring the water inflow and the water outlet temperature in real time.
Specifically, in practical application, in order to avoid data interference, the embodiment of the invention performs basic filtering processing on the acquired real-time data, so as to correspondingly generate a water inflow curve and a water outflow temperature curve. The method includes the steps that data, within +/-0.1L/min of the current water inflow rate and within +/-0.1 ℃ of the current water outflow temperature fluctuation (namely, the difference value between the current water outflow temperature and a preset water outflow temperature fluctuation threshold value), in the sampling time t0 are equivalent to be fluctuation-free, fluctuation shielding is conducted, a curve image is smooth and smooth through filtering treatment, and therefore a data foundation is laid for better water temperature control of target water using equipment. The value range of t0 may be, for example, 0ms to 1000ms, but the practical situation is not limited to this, and the change of the value range of t0 is performed to further accurately and efficiently obtain the water inlet flow curve and the water outlet flow curve to avoid data interference, which is also within the protection range of the water temperature control method of the water using device provided by the embodiment of the present invention.
The embodiment of the invention monitors the water inflow signal of the target water using equipment through the water flow sensor, and draws a real-time water inflow curve as shown in fig. 2. The embodiment of the invention can timely and efficiently regulate the heating power of the target water using equipment by extracting the data in the real-time water inflow flow curve while intuitively reflecting the water inflow fluctuation condition, thereby acquiring the water inflow condition of the target water using equipment at the first time to correspondingly react and maximally ensuring the stability of the water outflow temperature.
Specifically, in practical application, the embodiment of the invention monitors the water outlet temperature signal of the target water using device through the water outlet temperature probe, and draws a real-time water outlet temperature curve as shown in fig. 3. Compared with the control mode that the inflow water flow is ensured to be constant within a certain range only by shielding the fluctuation condition of the inflow water flow in a smaller range in the prior art, so as to ensure the constant outflow water temperature, the embodiment of the invention monitors the inflow water flow in real time and monitors the outflow water temperature in real time, and the heating power function is corrected in real time for the purpose of calculating the current inflow water change rate and the current outflow water temperature fluctuation amount subsequently and controlling the target water equipment to the greatest extent when the current inflow water change rate is larger than the inflow water change threshold and the current outflow water temperature fluctuation amount is larger than the outflow water temperature fluctuation threshold, as shown in fig. 3, and the control effect is quite remarkable.
Specifically, in an embodiment, the step S102 corrects the heating power function of the target water using device based on the inflow rate curve and the outflow temperature curve, and specifically includes the following steps:
step S301: and extracting the current water inflow and the current water outflow temperature from the water inflow curve and the water outflow temperature curve respectively.
Step S302: based on the water inflow curve, a first fluctuation period closest to the current moment is acquired, wherein the first fluctuation period is the time length of the water inflow meeting the water inflow fluctuation condition.
Step S303: and acquiring a second fluctuation period closest to the current moment based on the water outlet temperature curve, wherein the second fluctuation period is the time length of the water outlet temperature meeting the water outlet temperature fluctuation condition.
Step S304: and correcting the heating power function based on the current water inlet flow, the current water outlet temperature, the first fluctuation period and the second fluctuation period.
Specifically, in practical application, the embodiment of the invention obtains a group of continuous smooth curves according to the water inflow and the water outflow temperature after filtering treatment, obtains the corresponding derivative function curves by respectively deriving each point on the water inflow curve and the water outflow temperature curve, further obtains the respective inflection point and each fluctuation period, and corrects the heating power in the next fluctuation period by calculating the characteristics of the curve in the last fluctuation period.
Specifically, in practical application, considering that a section of continuous curve image always has a corresponding "crest" and/or a "trough" in a closed section thereof, and the "crest" and/or the "trough" most possibly meets the condition of fluctuation of inflow flow or the condition of fluctuation of outflow temperature, the "crest" and/or the "trough" of the section of continuous curve in a certain closed section range can be judged, and when the condition of fluctuation of inflow flow is met, the curve can be judged to have a first fluctuation period in the closed section; when the temperature fluctuation condition of the water outlet is met, the curve can be judged to have a second fluctuation period in the closed section. Therefore, the fluctuation period can be determined through the time ranges corresponding to the two adjacent "wave crests" or the two "wave troughs", but the actual situation is not limited to this, the first/second fluctuation period may be smaller than the time ranges corresponding to the two adjacent "wave crests" or the two "wave troughs", the time ranges determined by the two adjacent "wave crests" or the two "wave troughs" are enlarged or reduced to realize the real-time accurate correction of the heating power function, and the determined change of the fluctuation period is also within the protection range of the water temperature control method of the water using device provided by the embodiment of the invention.
For example, when the second fluctuation period is determined, if two "peaks" respectively correspond to 5 points, 10 minutes and 30 seconds, 5 points, 10 minutes and 33 seconds, and the water outlet temperature fluctuation condition is satisfied, the second fluctuation period may be 3s, and two time nodes, 5 points, 10 minutes and 31 seconds, 5 points, 10 minutes and 32 seconds, corresponding to the water outlet temperature that just satisfies the water outlet temperature fluctuation condition may also be found, and the second fluctuation period may be 1s.
It should be noted that, in the embodiment of the present invention, the period of fluctuation is not strictly defined as the period function, and because a continuous curve image always has the highest value in its closed region, and the fluctuation curve image has obvious oscillation characteristics, 2 continuous peaks or troughs can be 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 filtered water inflow curve, 2 connected peaks or troughs closest to the current moment are regarded as a first fluctuation period, wherein the water inflow in the first fluctuation period meets the water inflow fluctuation condition, namely the water inflow change rate is larger than a water inflow change threshold; and according to the filtered water outlet temperature curve, regarding 2 connected wave crests or wave troughs closest to the current moment as a second fluctuation period, wherein the water outlet temperature in the second fluctuation period meets the water outlet temperature fluctuation condition, namely the fluctuation amount of the water outlet temperature is larger than a water outlet temperature fluctuation threshold value.
According to the embodiment of the invention, the first fluctuation period and the second fluctuation period are respectively determined, so that the water inflow and the water outlet temperature change condition are fully mastered, 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, the real-time correction of the heating power function is realized on the premise of ensuring accurate data, the water outlet temperature is ensured to be stable to the greatest extent, and the use requirement of a user is 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 3s by taking the maximum value of the two.
Specifically, in practical application, in order to ensure that the target fluctuation period can include a first fluctuation period and a second fluctuation period at the same time, the starting time of the first fluctuation period and the ending time of the second fluctuation period can be determined by looking at the inflow flow curve, and the starting time of the first fluctuation period is 5 points, 10 minutes and 31 seconds, and the ending time of the first fluctuation period is 5 points, 10 minutes and 35 seconds; the starting time of the second fluctuation period is 5 points 10 minutes 36 seconds, the ending time is 5 points 10 minutes 39 seconds, and the target fluctuation period can be determined to be 8s through the fact that the second fluctuation period is 5 points 10 minutes 31 seconds to 5 points 10 minutes 39 seconds, and in this way, the target fluctuation period can be effectively ensured to simultaneously comprise the first fluctuation period and the second fluctuation period, and correction accuracy is further improved.
Specifically, in practical application, because the water inlet flow curve and the water outlet 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 on the basis, determines the maximum time range corresponding to the first fluctuation period and the second fluctuation period as the target fluctuation period, thereby ensuring the whole fluctuation period to be covered, correcting the heating power function aiming at the target fluctuation period, ensuring the stability of the water outlet temperature and greatly improving the user experience.
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 application, the embodiment of the invention corrects the heating power function, wherein the formula of the heating power correction function is as follows:
Wherein T 3 is a target fluctuation period; t is the current moment; q (t) is the current water inflow; k (t) is the current outlet water temperature; k Setting up is the preset water outlet temperature of the target water using equipment; c Water and its preparation method is the specific heat capacity of water.
At this time, the heating power function will change to:
P′ Heating ＝P Heating +P Correction (3)
Wherein P' Heating is the modified target heating power function; p Heating is the current heating power function when not corrected; p Correction is the heating power correction function.
The embodiment of the invention carries out updating iteration based on real-time data, and can correct the heating power function to the greatest extent, thereby effectively reducing the fluctuation of the water outlet 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 device to heat according to the corrected target heating power function, and specifically includes the following steps:
Step S501: and calculating the target power according to the corrected target heating power function.
Step S502: the target water device is controlled to heat at the target power.
Specifically, in practical application, after the target heating power function is determined, the embodiment of the invention calculates the target power 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 further includes the following steps:
Step S601: and returning to the step S101 to obtain the water inlet flow curve and the water outlet temperature curve of the target water using device when the water inlet rate is not greater than the water inlet rate change threshold or the water outlet temperature fluctuation is not greater than the water outlet temperature fluctuation threshold, and respectively calculating to obtain the current water inlet rate change and the current water outlet temperature fluctuation based on the water inlet flow 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 value, or the water outlet temperature fluctuation amount is not greater than the water outlet temperature fluctuation threshold value, it can be determined that the current working state of the target water using device can meet the use requirement of a user.
The water temperature control method of the water using device provided by the embodiment of the invention will be described in detail below with reference to specific application examples.
In the conventional filtering control scheme, when the water inflow rate exceeds 0.10, the filtering control is disabled, as shown in fig. 3, and at this time, the water temperature control effect is poor, so that the use feeling of a user is seriously affected. 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:
1-4, the current inflow rate change q ' (t) is 0.15, the fluctuation of the water outlet temperature of the gas water heater is large, the fluctuation of the current water outlet temperature delta K=5, and the heating power function of the gas water heater is corrected at the moment because q ' (t) is larger than the water inlet rate change threshold q ' (t) Threshold value and delta K is larger than the water outlet temperature fluctuation threshold K Threshold value . The gas water heater heats with the target power calculated according to the corrected target heating power function, and continuously carries out updating iteration, so that the outlet water temperature fluctuation of the gas water heater is kept within a reasonable range (not more than +/-2 ℃), as shown in fig. 3, the water temperature control method of the water using equipment achieves an ideal water temperature control effect, and meets the use requirement of users.
Because the current inflow rate q '(t) is consistent with the inflow rate change threshold q' (t) Threshold value in unit, which is 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 in unit of ms, the value range is 0-1000, and the current outflow water temperature fluctuation amount delta K is consistent with the outflow water temperature fluctuation threshold K Threshold value in unit of DEG C, the above description only exemplifies the numerical values and does not cumulate the units.
When the fluctuation of the inflow water flow is too large and the existing water flow signal filtering scheme fails, the control scheme is interposed, the average heating power of the gas water heater is calculated by calculating the heating power required by the gas water heater in a fluctuation period, the corrected heating power is used for heating, the heating power function is updated in a subsequent iteration mode, the updated heating power function is used for controlling the gas water heater, and the fluctuation of the outflow water temperature can be effectively and reliably reduced.
Generating a water inflow curve function q (t) and a water outflow temperature curve function K (t) by acquiring real-time values of water inflow and water outflow temperatures of the target water using equipment in the using process; acquiring a water inflow flow fluctuation period T 1 through a curve function q (T), and calculating the current water inflow change rate q' (T); obtaining a water outlet temperature fluctuation period T 2 through a curve function K (T), and calculating the current water outlet temperature fluctuation quantity delta K of the current water outlet temperature K and the preset water outlet temperature K Setting up of the target water using equipment; when q ' (t) > q ' (t) Threshold value and DeltaK > K Threshold value , the heating power function P is corrected, and at the moment, P ' Heating ＝P Heating +P Correction is updated continuously, so that the fluctuation of the outlet water temperature can be effectively reduced, the water temperature is kept stable, and the heating performance of the target water using equipment is improved.
The embodiment of the invention provides a water temperature control device of water using equipment, as shown in fig. 5, the water temperature control device of the water using equipment comprises:
the calculating module 101 is configured to obtain a water inflow curve, a water outflow temperature curve and a preset water outflow temperature of the target water using device, and calculate a current water inflow rate and a current water outflow temperature fluctuation based on the water inflow curve, the water outflow temperature curve and the preset water outflow temperature, respectively. For details, refer to the related description of step S101 in the above method embodiment, and no further description is given here.
The correction module 102 is configured to correct a heating power function of the target water using device based on the water inflow curve and the water outflow temperature curve when the current water inflow change rate is greater than the water inflow change threshold and the current water outflow temperature fluctuation is greater than the water outflow temperature fluctuation threshold. For details, refer to the related description of step S102 in the above method embodiment, and no further description is given 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, see the description of step S103 in the above method embodiment, and the details are not repeated here.
For further description of the water temperature control device of the water using apparatus, refer to the related description of the water temperature control method embodiment of the water using apparatus, and no further description is given here.
Through the cooperation of the above components, the water temperature control device for the water using equipment provided by the embodiment of the invention calculates the current water inflow change rate and the current water outlet temperature fluctuation based on the water inflow curve, the water outlet temperature curve and the preset water outlet temperature respectively, compares the current water inflow change rate and the current water outlet temperature fluctuation with the corresponding thresholds respectively, corrects the heating power function of the target water using equipment when the current water inflow change rate and the current water outlet temperature fluctuation are both larger than the thresholds respectively, controls the target water using equipment to heat by the corrected target heating power function, and further effectively corrects the heating power function according to the current water inflow change rate and the current water outlet temperature fluctuation when the situation that the target water using equipment cannot guarantee water outlet at constant temperature due to large water inflow fluctuation is greatly reduced, so that the water temperature of the target water using equipment is effectively regulated, 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.
An embodiment of the present invention provides an electronic device, as shown in fig. 6, where 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 other means, and in fig. 6, the connection is exemplified by a bus.
The processor 901 may be a central processing unit (Central Processing Unit, CPU). The Processor 901 may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL processors, DSPs), application SPECIFIC INTEGRATED Circuits (ASICs), field-Programmable gate arrays (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 902 is used as a non-transitory computer readable storage medium 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 of the processor 901 and data processing, i.e., implements the methods in the above-described method embodiments, by running non-transitory software programs, instructions, and modules stored in the memory 902.
The memory 902 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created by the processor 901, and the like. In addition, 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, memory 902 optionally includes memory remotely located relative to processor 901, which may be connected to 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 that, when executed by the processor 901, perform the methods of the method embodiments described above.
The specific details of the electronic device may be correspondingly understood by referring to the corresponding related descriptions and effects in the above method embodiments, which are not repeated herein.
It will be appreciated by those skilled in the art that implementing all or part of the above-described methods in the embodiments may be implemented by a computer program for instructing relevant hardware, and the implemented program may be stored in a computer readable storage medium, and the program may include the steps of the embodiments of the above-described methods when executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a hard disk (HARD DISK DRIVE, abbreviated as HDD), a Solid state disk (Solid-STATE DRIVE, SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (7)
1. A water temperature control method of a water using apparatus, comprising:
acquiring a water inlet flow 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 inlet change rate and a current water outlet temperature fluctuation based on the water inlet flow 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 based on the water inflow curve and the water outlet temperature curve;
controlling the target water using equipment to heat according to the corrected target heating power function;
The correcting the heating power function of the target water using device based on the water inlet flow curve and the water outlet temperature curve comprises the following steps:
extracting current water inflow and current water outflow temperature from the water inflow curve and the water outflow temperature curve respectively;
Acquiring a first fluctuation period closest to the current moment based on the water inflow curve, wherein the first fluctuation period is the time length of the water inflow meeting the water inflow fluctuation condition;
acquiring a second fluctuation period closest to the current moment based on the water outlet temperature curve, wherein the second fluctuation period is the time length of the water outlet temperature meeting the water outlet temperature fluctuation condition;
correcting the heating power function based on the current water inflow, the current water outflow temperature, the first fluctuation period and the second fluctuation period;
The correcting the heating power function based on the current inflow, 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 water inflow, the current water outflow temperature and the target fluctuation period;
correcting the heating power function by using the heating power correction function;
The formula of the heating power correction function is as follows:
Wherein T 3 is a target fluctuation period; t is the current moment; q (t) is the current water inflow; k (t) is the current outlet water temperature; k Setting up is the preset water outlet temperature of the target water using equipment; c Water and its preparation method is the specific heat capacity of water.
2. The method of claim 1, wherein the obtaining the inflow and outflow temperature profiles of the target water device comprises:
monitoring the water inlet flow and the water outlet temperature of the target water using equipment;
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 time.
3. The method according to claim 1, wherein the method further comprises:
and returning to the step of obtaining the water inflow curve and the water outflow temperature curve of the target water equipment when the water inflow change rate is not greater than the water inflow change threshold or the water outflow temperature fluctuation is not greater than the water outflow temperature fluctuation threshold, and respectively calculating the current water inflow change rate and the current water outflow temperature fluctuation based on the water inflow curve and the water outflow temperature curve.
4. The method of claim 1, wherein controlling the target water device to heat according to the modified target heating power function comprises:
calculating to obtain target power according to the corrected target heating power function;
and controlling the target water using equipment to heat at the target power.
5. A water temperature control device of a water using apparatus, 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 the target water using equipment, and calculating to obtain the current water inlet change rate and the current water outlet temperature fluctuation based on the water inlet flow curve, the water outlet temperature curve and the preset water outlet temperature respectively;
The correction module is used for correcting the heating power function of the target water using equipment based on the water inlet flow curve and the water outlet temperature curve when the current water inlet change rate is larger than a water inlet change threshold and the current water outlet temperature fluctuation is larger than a water outlet temperature fluctuation threshold;
the control module is used for controlling the target water equipment to heat according to the corrected target heating power function;
The correcting the heating power function of the target water using device based on the water inlet flow curve and the water outlet temperature curve comprises the following steps:
extracting current water inflow and current water outflow temperature from the water inflow curve and the water outflow temperature curve respectively;
Acquiring a first fluctuation period closest to the current moment based on the water inflow curve, wherein the first fluctuation period is the time length of the water inflow meeting the water inflow fluctuation condition;
acquiring a second fluctuation period closest to the current moment based on the water outlet temperature curve, wherein the second fluctuation period is the time length of the water outlet temperature meeting the water outlet temperature fluctuation condition;
correcting the heating power function based on the current water inflow, the current water outflow temperature, the first fluctuation period and the second fluctuation period;
The correcting the heating power function based on the current inflow, 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 water inflow, the current water outflow temperature and the target fluctuation period;
correcting the heating power function by using the heating power correction function;
The formula of the heating power correction function is as follows:
Wherein T 3 is a target fluctuation period; t is the current moment; q (t) is the current water inflow; k (t) is the current outlet water temperature; k Setting up is the preset water outlet temperature of the target water using equipment; c Water and its preparation method is the specific heat capacity of water.
6. An electronic device, comprising:
a memory and a processor in communication with each other, the memory having stored therein computer instructions which, upon execution, cause the processor to perform the method of any of claims 1-4.
7. A computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1-4.
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