Method, system and storage medium for detecting heating efficiency of heating rod in water heater

Abstract

The present application relates to the technical field of electric water heaters, and discloses a method, system and storage medium for detecting the heating efficiency of a heating rod in a water heater, and the steps are as follows: first measure the voltage U and current I of the heating rod, and calculate the heating power P; obtain the volume V of the heat tube, and measure the temperatures Tl and Th of the heat tube before and after heating; calculate the power W1 required for heating based on the water volume; calculate the total electric power W2 for heating; and obtain the heating efficiency K. Obtain the heating efficiency Ka of the new heating rod, and calculate the attenuation parameter S, S=(1‑K / Ka)×100%. If S is greater than the preset reference value Sc, a prompt is given to replace the heating rod. By obtaining the heating efficiency of the new heating rod and comparing it with the heating efficiency of the current heating rod, the attenuation parameter is calculated, and the performance change of the heating rod with the use time can be monitored in real time, and whether the heating rod has a performance degradation problem can be discovered in time.

Description

Technical Field

[0001] The present application relates to the technical field of electric water heaters, and in particular to a method, system and storage medium for detecting the heating efficiency of a heating rod in a water heater. Background Art

[0002] A water heater is a device that uses various physical principles to increase the temperature of cold water into hot water within a certain period of time. According to different principles, it can be divided into electric water heaters, gas water heaters, solar water heaters, magnetic water heaters, air water heaters, heating water heaters, etc.

[0003] Among them, electric water heaters refer to water heaters that use electricity as energy for heating, and the heating device generally uses an electric heating rod. Therefore, in a water heater, the electric heating rod is an important component for heating water. However, as the use time increases, the efficiency of the heating rod gradually decreases, resulting in increased energy consumption and decreased heating effect of the water heater. For example: minerals in the water form scale on the surface of the heating rod, reducing the efficiency of heat conduction; the heating rod material may corrode under the action of high temperature and water, affecting its performance; the resistance of the heating rod may increase, resulting in power loss; the material of the heating rod may age due to long-term high-temperature use, reducing its thermal conductivity.

[0004] The obvious decrease in the heating efficiency of the heating rod will lead to a significant increase in the user's electricity consumption, and problems such as insufficient water supply during peak hours will seriously affect the user experience and waste the user's electricity bills. Therefore, there is an urgent need for a method that can detect the heating efficiency of the heating rod, and when the heating efficiency is significantly reduced, the user can be prompted to replace the water machine heating rod. Summary of the invention

[0005] In order to prompt the user to replace the water heater heating rod when the heating efficiency of the heating rod is significantly reduced, the present application provides a method, system and storage medium for detecting the heating efficiency of the heating rod in a water heater.

[0006] In a first aspect, the present application provides a method for detecting the heating efficiency of a heating rod in a water heater, which adopts the following technical solution:

[0007] A method for detecting the heating efficiency of a heating rod in a water heater comprises the following steps:

[0008] The voltage of the heating rod is detected to obtain a heating voltage value U, the current of the heating rod is detected to obtain a heating current value I, and a heating power value P is calculated, wherein P=U×I;

[0009] The container of hot water is a heat container, and the volume value V of the heat container is obtained; the temperature of the heat container before heating is detected as the starting temperature value Tl, and the temperature of the heat container when heating is stopped is detected as the ending temperature value Th;

[0010] Based on the water having the volume value V, the heating power value W1 required to heat the water from the starting temperature value Tl to the ending temperature value Th is calculated, W1=m×c×(Th-Tl), where m is the mass of water, m=V×ρ, c is the specific heat capacity of water, and ρ is the density of water;

[0011] Calculate the total electric power W2 from the start of heating the hot bulb to the stop of heating the hot bulb, W2=P×t, where t is the heating time from the start of heating the hot bulb to the stop of heating the hot bulb, in seconds;

[0012] Calculate the heating efficiency K of the heating rod, K=W1 / W2×100%;

[0013] Obtaining a new heating efficiency Ka of the heating rod, and calculating an attenuation parameter S of the heating rod;

[0014] S = (1-K / Ka) × 100%;

[0015] If the attenuation parameter S is greater than the preset reference value Sc, a prompt to replace the heating rod is given.

[0016] By adopting the above technical solution, the heating efficiency of the heating rod is accurately calculated using clear physical formulas and measurement steps. First, the voltage and current of the heating rod are measured respectively to obtain the heating power value, and then the power value required for heating is calculated based on the volume of the heat tank, the starting and ending temperatures of the water, and other data, so as to accurately obtain the heating efficiency, which provides strong data support for objectively evaluating the performance of the heating rod. Clearly knowing the actual proportion of the heating rod converting electrical energy into water thermal energy can help users intuitively understand the energy utilization efficiency of the water heater during the heating process, facilitate the evaluation of the energy consumption level of the product, and provide a reference for users to use the water heater reasonably and reduce energy consumption. By obtaining the heating efficiency of the new heating rod and comparing it with the heating efficiency of the current heating rod, the attenuation parameter is calculated, and the performance of the heating rod can be monitored in real time as the use time changes, and whether the heating rod has a performance degradation problem can be discovered in time. Setting a preset reference value, when the attenuation parameter exceeds this value, a prompt to replace the heating rod is issued, which can provide a scientific and reasonable basis for the maintenance of the water heater and the replacement of the heating rod. This can avoid problems such as low heating efficiency and increased energy consumption caused by the aging of the heating rod, while ensuring the normal operation of the water heater, improving the safety and reliability of use, and effectively extending the service life of the water heater.

[0017] Optionally, the method further comprises the following steps:

[0018] Obtain the heating efficiencies Ka of the most recently produced heating rods; calculate the average value of the heating efficiencies Ka as the factory heating efficiency Kb;

[0019] The heating efficiency Ka is replaced by the factory heating efficiency Kb, and a new attenuation parameter S is calculated.

[0020] By adopting the above technical solution, there may be certain individual differences in the actual performance of the newly produced heating rods. By obtaining the heating efficiency of multiple newly produced heating rods and calculating their average value as the factory heating efficiency Kb, these individual differences can be comprehensively considered to obtain a more representative value. Compared with the heating efficiency Ka of a single heating rod, Kb can more accurately reflect the overall performance level of the batch of heating rods. Using Kb instead of Ka to calculate the attenuation parameter S can reduce the calculation error caused by individual differences, so that the attenuation parameter S can more truly reflect the performance attenuation of the heating rod during use. The factory heating efficiency Kb determined based on the average value of the heating efficiencies of multiple heating rods provides a relatively stable reference standard for the subsequent calculation of the attenuation parameters. When evaluating the performance attenuation of a heating rod, a stable reference standard helps to improve the consistency and comparability of the calculation of attenuation parameters between different stages and different heating rods, thereby more accurately judging the performance change trend of the heating rod.

[0021] Optionally, the method further comprises the following steps:

[0022] Obtain the changing trends of the most recent multiple attenuation parameters S compared with the preset rising curve, and adjust the reference value Sc in an anti-correlated manner according to the changing trends. If the changing trend decreases faster, the reference value Sc becomes smaller; if the changing trend increases slower, the reference value Sc becomes larger.

[0023] By adopting the above technical solution, the reference value Sc can be adjusted in real time according to the changing trend of the attenuation parameters. During the long-term use of the heating rod, the performance attenuation is not static. By obtaining the changing trend of multiple attenuation parameters and comparing them with the preset rising curve, its actual performance changes can be more accurately reflected. The faster the changing trend decreases, the faster the performance of the heating rod decays. At this time, lowering the reference value Sc can prompt the replacement of the heating rod earlier and avoid a series of problems caused by excessive wear of the heating rod; if the changing trend rises slower, it indicates that the performance of the heating rod is relatively stable. Properly increasing the reference value Sc can extend its service life while ensuring the normal operation of the heating rod, avoid unnecessary replacement, and improve resource utilization.

[0024] Optionally, the method further comprises the following steps:

[0025] The fluctuation amplitudes of the most recent multiple attenuation parameters S are used to adjust the number of newly produced heating rods involved in the calculation in a positive correlation with the fluctuation amplitudes. The larger the fluctuation amplitude, the more newly produced heating rods are involved in the calculation, and the smaller the fluctuation amplitude, the fewer newly produced heating rods are involved in the calculation.

[0026] By adopting the above technical solution, the number of newly produced heating rods involved in the calculation is adjusted according to the fluctuation range of the attenuation parameter S, which can more accurately reflect the stability of the heating rod performance. When the fluctuation range is large, it means that there may be greater uncertainty and discreteness in the performance of the heating rod. Increasing the number of new heating rods involved in the calculation can cover the performance of more different individuals, making the calculated heating efficiency Ka of the new heating rod more representative and reliable, thereby providing a more solid foundation for the subsequent accurate evaluation of the attenuation of the existing heating rods.

[0027] Optionally, the method further comprises the following steps:

[0028] The number of the heating rods produced in the same batch within the set geographical range is obtained as the regional number M1;

[0029] Calculating the attenuation parameter S of the heating rod within the geographical range;

[0030] Calculate the number of the attenuation parameters S in the area number M1 that is greater than the reference value Sc as the range warning number M1y;

[0031] If the range warning quantity M1y is greater than the preset warning reference value Mc, a prompt to replace the heating rods in the area is given.

[0032] By adopting the above technical solution, centralized monitoring and analysis are carried out on the heating rods of the same batch produced within a specific geographical area. When it is calculated that the number of attenuation parameters S in the area that is greater than the reference value Sc (i.e., the range warning number M1y) exceeds the preset warning reference value Mc, a prompt is issued to replace the heating rods in the area. This method can accurately locate the area where the problem exists, avoid blindly replacing all heating rods, and improve the pertinence and efficiency of maintenance work. Compared with indiscriminate maintenance or replacement of all heating rods, this regionalized management method can more reasonably allocate human, material and financial resources. Concentrate resources on areas where heating rods really need to be replaced to avoid waste of resources, while ensuring that the heating rods of water heaters in each area can be maintained in a timely and effective manner.

[0033] Optionally, the method further comprises the following steps:

[0034] Obtaining the arrangement areas of the heating rods produced in the same batch, dividing the arrangement areas into a plurality of distribution areas according to a preset standard range, the number of the distribution areas being the distribution number Mf;

[0035] Calculating the attenuation parameter S of all the heating rods in each of the distribution areas;

[0036] Taking an average value of all the attenuation parameters S in each of the distribution areas to obtain the distribution number Mf distribution attenuation values ​​Sf;

[0037] Calculate the area of ​​the distribution attenuation values ​​Sf of the distribution quantity Mf that is greater than the reference value Sc as the distribution warning area;

[0038] The distribution density of the distribution warning area is calculated as a position distribution density value. If the position distribution density value is greater than a preset reference density value, a regional water quality warning prompt is issued.

[0039] By adopting the above technical solution, the layout area of ​​the heating rod is divided into multiple distribution areas according to the preset standard range, and the average value of the heating rod attenuation parameter in each area is calculated as the distribution attenuation value. This refined analysis method can more accurately locate which distribution areas have more serious heating rod attenuation, and can provide more detailed and accurate information compared to the situation where only the overall area is focused. The distribution warning area is determined by judging whether the distribution attenuation value is greater than the reference value Sc, which provides a clear target area for subsequent in-depth analysis of the problem. The distribution density of the distribution warning area is calculated and compared with the preset reference density value. When the position distribution density value is greater than the reference density value, a regional water quality warning prompt is issued. This process establishes a correlation between the attenuation of the heating rod and the regional water quality, because the attenuation of the heating rod may be affected by the water quality to a certain extent. In this way, areas where water quality problems may exist can be discovered in a timely manner, providing a basis for further water quality testing and treatment.

[0040] Optionally, the method further comprises the following steps:

[0041] The distribution density of the heating rods in the arrangement area is calculated as a heating distribution density value, and the standard range is adjusted inversely according to the heating distribution density value; the larger the heating distribution density value, the smaller the standard range; the smaller the heating distribution density value, the larger the standard range.

[0042] By adopting the above technical solution, the standard range is adjusted inversely according to the distribution density of the heating rods in the layout area, making the regional division more scientific and reasonable. When the heating distribution density value is larger, it means that the heating rods are densely distributed in the area. At this time, narrowing the standard range can more carefully analyze and manage the areas where the heating rods are concentrated, and accurately capture the performance changes of the heating rods in each small area; conversely, when the heating distribution density value is smaller, appropriately increasing the standard range can ensure the effectiveness of the analysis while avoiding unnecessary calculation and management costs due to overly detailed regional division. This adjustment method achieves a good balance between analysis accuracy and management efficiency. For areas with dense distribution of heating rods, fine division can provide more detailed information and help discover small but potentially important differences; for areas with sparse distribution, a larger standard range can cover a sufficient number of heating rods for meaningful analysis without making management too cumbersome.

[0043] Optionally, the method further comprises the following steps:

[0044] The distribution density of the heating rods in the arrangement area is calculated as a heating distribution density value, and the reference density value is adjusted in positive correlation with the heating distribution density value; the larger the heating distribution density value, the larger the reference density value; the smaller the heating distribution density value, the smaller the reference density value.

[0045] By adopting the above technical solution, the heating distribution density reflects the density of the heating rods in the layout area. When the heating distribution density value is larger, it means that there are more heating rods in the area, so the possibility of more heating rod attenuation abnormalities is relatively higher. At this time, increasing the reference density value means that when judging whether to conduct a regional water quality warning, a higher distribution density requirement will be placed on the distribution warning area. This is reasonable, because more heating rods themselves may lead to a higher distribution density. Only when the actual distribution density is significantly higher than the normal level, it is more likely to be caused by water quality problems. On the contrary, the smaller the heating distribution density value, the smaller the reference density value, which can more keenly capture the water quality problems that may exist in areas where the heating rods are sparsely distributed, so that the water quality warning is more in line with the actual situation in different areas. Dynamically adjusting the reference density value according to the heating distribution density can avoid misjudgment or missed judgment that may occur due to a fixed reference density value. In areas where the heating rods are densely distributed, it is possible to prevent unnecessary water quality warnings from being frequently triggered due to the normal high distribution density; in areas where the heating rods are sparsely distributed, it is possible to ensure that potential water quality problems can be discovered in a timely manner, thereby achieving accurate warnings of regional water quality problems.

[0046] In a second aspect, the present application provides a detection system for the heating efficiency of a heating rod in a water heater, which adopts the following technical solution:

[0047] A system for detecting the heating efficiency of a heating rod in a water heater comprises a processor, wherein the processor executes the steps of any one of the above-mentioned methods for detecting the heating efficiency of a heating rod in a water heater.

[0048] In a third aspect, the present application provides a storage medium, which adopts the following technical solution:

[0049] A storage medium stores a program, wherein the program, when executed by a processor, implements the steps of any one of the above-mentioned methods for detecting the heating efficiency of a heating rod in a water heater.

[0050] In summary, the present application includes at least one of the following beneficial technical effects:

[0051] By precisely measuring the voltage, current, and heat-related parameters of the heating rod, and accurately calculating indicators such as heating efficiency and attenuation parameters, a quantitative basis is provided for a comprehensive and objective evaluation of the performance of the heating rod, which helps to gain a deeper understanding of the working status and actual efficiency of the heating rod.

[0052] On the one hand, the reference value Sc is adjusted in an anti-correlated manner according to the changing trend of the attenuation parameter, which can flexibly adapt to the dynamic changes in the performance of the heating rod, reasonably plan the replacement time of the heating rod, and improve the scientific nature of the maintenance strategy. On the other hand, the reference density value is adjusted in a positive correlation with the heating distribution density to make the regional water quality warning more accurate, effectively avoid misjudgment and missed judgment, and improve the rationality and reliability of the warning mechanism.

[0053] Regional division and management of heating rods can enable accurate analysis and decision-making based on the characteristics of different regions. By calculating the attenuation parameters of heating rods in the region, distribution warning areas, etc., centralized monitoring and maintenance reminders for heating rods in specific areas can be achieved, improving the pertinence of maintenance work and the rationality of resource allocation, and ensuring the user experience and safety of users in the region. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 The present invention is a step-by-step diagram of a method for detecting the heating efficiency of a heating rod in a water heater.

[0055] Figure 2 It is a step-by-step diagram to indicate whether to replace the heater rod in the area.

[0056] Figure 3 It is a step-by-step diagram for determining whether to issue a regional water quality early warning.

[0057] Figure 4 This is a schematic diagram of the water quality warning area. DETAILED DESCRIPTION

[0058] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings.

[0059] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] The present application embodiment discloses a method for detecting the heating efficiency of a heating rod in a water heater, referring to Figure 1, including the following steps:

[0061] The voltage at both ends of the heating rod is measured by using a voltage detection device. The voltage of the heating rod is detected to obtain the heating voltage value U. The current of the heating rod is detected to obtain the heating current value I. The heating power value P is calculated, where P=U×I.

[0062] The container of hot water is a hot water container, and the volume value V of the hot water container is obtained; the temperature of the hot water container before heating is detected as the starting temperature value Tl, and the temperature of the hot water container when heating is stopped is detected as the ending temperature value Th.

[0063] Based on the volume of water with a volume value of V, the heating power value W1 required to heat the water from the starting temperature value Tl to the ending temperature value Th is calculated, W1=m×c×(Th-Tl), where m is the mass of water, m=V×ρ, c is the specific heat capacity of water, and ρ is the density of water.

[0064] Calculate the total electric power W2 from the start of heating the hot end to the stop of heating the hot end, W2=P×t, where t is the heating time from the start of heating the hot end to the stop of heating the hot end, in seconds.

[0065] Calculate the heating efficiency K of the heating rod, K=W1 / W2×100%.

[0066] Obtain the heating efficiency Ka of the new heating rod and calculate the attenuation parameter S of the heating rod;

[0067] S = (1-K / Ka) × 100%;

[0068] If the attenuation parameter S is greater than the preset reference value Sc, a prompt to replace the heating rod will be given.

[0069] Assume a water heater, the volume of the heat tank is V=50L=0.05m³;

[0070] Using voltage detection equipment, the voltage U=220V and current I=5A at both ends of the heating rod were measured.

[0071] According to the formula P=U×I, the heating power value can be calculated as P=220V×5A=1100W.

[0072] Detect the temperature of the hot pot before heating, the starting temperature value Tl=20℃.

[0073] Detect the temperature of the heat bulb when heating stops, and the termination temperature value Th=60℃.

[0074] It is known that the density of water is ρ=1000kg / m³. According to m=V×ρ, the mass of water is 50kg.

[0075] The specific heat capacity of water is c=4.2×10³J / (kg·℃).

[0076] From the formula W1=m×c×(Th-Tl), we can get W1=50kg×4.2×10³J / (kg·℃)×(60℃-20℃)=8.4×10^6J.

[0077] The heating time from the start of heating the hot end to the stop of heating the hot end is t=8000s.

[0078] It is known that the heating power P=1100W. According to W2=P×t, we can get W2=1100W×8000s=8.8×10^6J.

[0079] According to the formula K=95.45%.

[0080] Assume that the heating efficiency of the new heating rod is Ka=98%.

[0081] According to the formula, S=2.6%.

[0082] Because 2.6%<5%, that is, the attenuation parameter S is less than the preset reference value Sc, there is no need to issue a reminder to replace the heating rod at this time.

[0083] The heating efficiency of the heating rod is accurately calculated using clear physical formulas and measurement steps. First, the voltage and current of the heating rod are measured to obtain the heating power value, and then the power value required for heating is calculated based on the volume of the heat tank, the starting and ending temperatures of the water, and other data, so as to accurately obtain the heating efficiency, which provides strong data support for objectively evaluating the performance of the heating rod. Clearly knowing the actual proportion of the heating rod converting electrical energy into water thermal energy can help users intuitively understand the energy utilization efficiency of the water heater during the heating process, facilitate the evaluation of the energy consumption level of the product, and provide a reference for users to use the water heater reasonably and reduce energy consumption. By obtaining the heating efficiency of the new heating rod and comparing it with the heating efficiency of the current heating rod, the attenuation parameter is calculated, and the performance of the heating rod can be monitored in real time as the use time changes, and whether the heating rod has a performance degradation problem can be discovered in time. Set a preset reference value, and when the attenuation parameter exceeds this value, a reminder to replace the heating rod is issued, which can provide a scientific and reasonable basis for the maintenance of the water heater and the replacement of the heating rod. This can avoid problems such as low heating efficiency and increased energy consumption caused by the aging of the heating rod, while ensuring the normal operation of the water heater, improving the safety and reliability of use, and effectively extending the service life of the water heater.

[0084] Reference Figure 2 , the method further comprises the following steps:

[0085] Obtain the heating efficiencies Ka of the most recent multiple newly produced heating rods; calculate the average value of the multiple heating efficiencies Ka as the factory heating efficiency Kb.

[0086] Use the factory heating efficiency Kb to replace the heating efficiency Ka and calculate the new attenuation parameter S.

[0087] Assume that the heating efficiencies of the 10 new heating rods produced recently are: Ka1=98.2%, Ka2=97.8%, Ka3=98.0%, Ka4=97.9%, Ka5=98.1%, Ka6=97.7%, Ka7=98.3%, Ka8=97.6%, Ka9=98.0%, Ka10=97.9%.

[0088] The average value of these heating efficiencies is calculated to be Kb = 97.98%.

[0089] Now, use the factory heating efficiency Kb=97.98% to replace the original heating efficiency Ka=98%, and recalculate the attenuation parameter S=2.59%.

[0090] Because 2.59%<5%, that is, the new attenuation parameter S is still smaller than the preset reference value Sc, there is still no need to issue a reminder to replace the heating rod at this time.

[0091] There may be certain individual differences in the actual performance of newly produced heating rods. By obtaining the heating efficiency of multiple newly produced heating rods and calculating their average value as the factory heating efficiency Kb, these individual differences can be comprehensively considered to obtain a more representative value. Compared with the heating efficiency Ka of a single heating rod, Kb can more accurately reflect the overall performance level of the batch of heating rods. Using Kb instead of Ka to calculate the attenuation parameter S can reduce the calculation error caused by individual differences, so that the attenuation parameter S can more truly reflect the performance attenuation of the heating rod during use. The factory heating efficiency Kb determined based on the average value of the heating efficiencies of multiple heating rods provides a relatively stable reference standard for the subsequent calculation of the attenuation parameters. When evaluating the performance attenuation of a heating rod, a stable reference standard helps to improve the consistency and comparability of the calculation of attenuation parameters between different stages and different heating rods, thereby more accurately judging the performance change trend of the heating rod.

[0092] The method further comprises the steps of:

[0093] Obtain the change trend of the most recent multiple attenuation parameters S compared to the preset rising curve, and adjust the reference value Sc in an anti-correlated manner according to the change trend. If the change trend decreases faster, the reference value Sc will be smaller, and if the change trend increases slower, the reference value Sc will be larger. For example, if the recent change trend of the attenuation parameter S is significantly faster, reduce the reference value Sc from the original 5% to 4% or lower. In this way, even if the attenuation parameter S of the heating rod has not reached 5%, as long as it exceeds the new reference value Sc, such as 4%, the system will prompt to replace the heating rod.

[0094] The reference value Sc can be adjusted in real time according to the changing trend of the attenuation parameters. During the long-term use of the heating rod, the performance attenuation is not static. By obtaining the changing trend of multiple attenuation parameters and comparing them with the preset rising curve, its actual performance change can be more accurately reflected. The faster the changing trend decreases, the faster the performance of the heating rod decays. At this time, lowering the reference value Sc can prompt the replacement of the heating rod earlier to avoid a series of problems caused by excessive wear of the heating rod; if the changing trend rises slower, it indicates that the performance of the heating rod is relatively stable. Properly increasing the reference value Sc can extend its service life while ensuring the normal operation of the heating rod, avoid unnecessary replacement, and improve resource utilization.

[0095] The method further comprises the steps of:

[0096] The fluctuation amplitudes of the most recent multiple attenuation parameters S are used to adjust the number of newly produced heating rods involved in the calculation based on a positive correlation with the fluctuation amplitude. The larger the fluctuation amplitude, the more newly produced heating rods are involved in the calculation, and the smaller the fluctuation amplitude, the fewer newly produced heating rods are involved in the calculation.

[0097] When the fluctuation amplitude is smaller than a certain threshold value N1, fewer newly produced heating rods, for example, 5, are used to calculate the factory heating efficiency Kb.

[0098] When the fluctuation amplitude is between N1 and N2, a moderate number of newly produced heating rods, for example 10, is used.

[0099] When the fluctuation amplitude is greater than N2, more newly produced heating rods, for example, 20, are used for calculation.

[0100] Adjusting the number of newly produced heating rods involved in the calculation according to the fluctuation range of the attenuation parameter S can more accurately reflect the stability of the heating rod performance. When the fluctuation range is large, it means that there may be greater uncertainty and discreteness in the performance of the heating rod. Increasing the number of new heating rods involved in the calculation can cover the performance of more different individuals, making the calculated heating efficiency Ka of the new heating rod more representative and reliable, thereby providing a more solid foundation for the subsequent accurate evaluation of the attenuation of the existing heating rods.

[0101] The method further comprises the steps of:

[0102] The number of heating rods produced from the same batch within the set geographical range is obtained as the regional quantity M1.

[0103] Calculate the attenuation parameter S of the heating rod within the area.

[0104] The number of attenuation parameters S in the calculation area number M1 that is greater than the reference value Sc is the range warning number M1y.

[0105] If the range warning quantity M1y is greater than the preset warning reference value Mc, a prompt to replace the heater rods in the area will be given.

[0106] Assume that the set geographical scope is a specific city, and there are 100 heating rods from the same batch in the city (M1=100).

[0107] Based on historical data and industry standards, the reference value Sc is set to 5%; it is assumed that the attenuation parameter S ranges from 0 to 1, with 1 indicating no attenuation at all.

[0108] Through calculation, the attenuation parameter S of these 100 heating rods is obtained.

[0109] Assume that among these attenuation parameters S, the number of those greater than the reference value Sc (5%) is 50 (M1y=50).

[0110] The set warning reference value Mc is 45, that is, when the attenuation parameter S of more than 45 heating rods is greater than 5%, the system should issue a replacement prompt.

[0111] Because M1y (50) is greater than Mc (45), the system issues a reminder to replace the heater rod in the city.

[0112] Centralized monitoring and analysis are performed on the heating rods of the same batch produced within a specific geographical area. When it is calculated that the number of attenuation parameters S in the area that are greater than the reference value Sc (i.e., the range warning number M1y) exceeds the preset warning reference value Mc, a prompt is issued to replace the heating rods in the area. This method can accurately locate the area where the problem exists, avoid blindly replacing all heating rods, and improve the pertinence and efficiency of maintenance work. Compared with indiscriminate maintenance or replacement of all heating rods, this regionalized management method can more reasonably allocate human, material and financial resources. Concentrate resources on areas where heating rods really need to be replaced to avoid waste of resources, while ensuring that the heating rods of water heaters in each area can be maintained in a timely and effective manner.

[0113] Reference Figure 3 and Figure 4 , the method further comprises the following steps:

[0114] Get the layout area of ​​the heating rods produced in the same batch, and divide the layout area into multiple distribution areas according to the preset standard range. The number of distribution areas is the distribution number Mf. The layout area is divided into multiple distribution areas according to the preset standard range, and the distribution number Mf=8. These 8 distribution areas correspond to the installation positions of water heaters in different residential areas, for example, area 1 is the first distribution area, area 2 is the second distribution area, and so on.

[0115] Calculate the attenuation parameters S of all the heating rods in each distribution area. Assume that there are 10 heating rods in each distribution area, and assume that the attenuation parameters S of the 10 heating rods in one area are 3.2%, 4.5%, 2.8%, 3.8%, 3.5%, 2.6%, 3.0%, 4.2%, and 3.6%, respectively.

[0116] The number of distribution attenuation values ​​Sf is obtained by taking the average value of all attenuation parameters S in each distribution area. According to the attenuation parameters S of 10 heating rods in one area, Sf is calculated to be 3.52%.

[0117] The area with the distribution attenuation value Sf greater than the reference value Sc among the distribution number Mf is calculated as the distribution warning area. Assume that the Sf of the other 7 areas are 3.0%, 4.1%, 2.5%, 3.8%, 4.3%, 3.3%, and 2.9% respectively.

[0118] The distribution density of the distribution warning area is calculated as the location distribution density value. If the location distribution density value is greater than the preset reference density value, a regional water quality warning prompt is issued.

[0119] Assuming that the preset reference value Sc is 4.0% at this time, it is found that 4.1% and 4.3% are greater than 4.0%, and the distribution density value is 2 / 8=0.25, which is greater than the preset reference density value of 0.2. Therefore, a regional water quality early warning is required. In specific areas, since there are abnormalities in the third and sixth areas, combined with the map or the flow diagram of the water pipeline, there may be problems with the water quality entering these two areas. Therefore, an early warning is needed for further investigation to ensure water quality safety.

[0120] The layout area of ​​the heating rod is divided into multiple distribution areas according to the preset standard range, and the average value of the heating rod attenuation parameter in each area is calculated as the distribution attenuation value. This refined analysis method can more accurately locate which distribution areas have more serious heating rod attenuation, and can provide more detailed and accurate information compared to the situation where only the overall area is focused. The distribution warning area is determined by judging whether the distribution attenuation value is greater than the reference value Sc, which provides a clear target area for subsequent in-depth analysis of the problem. The distribution density of the distribution warning area is calculated and compared with the preset reference density value. When the position distribution density value is greater than the reference density value, a regional water quality warning prompt is issued. This process establishes a correlation between the attenuation of the heating rod and the regional water quality, because the attenuation of the heating rod may be affected by the water quality to a certain extent. In this way, areas where water quality problems may exist can be discovered in a timely manner, providing a basis for further water quality testing and treatment.

[0121] The method further comprises the steps of:

[0122] The distribution density of the heating rods in the arrangement area is calculated as the heating distribution density value, and the standard range is adjusted inversely according to the heating distribution density value. The larger the heating distribution density value, the smaller the standard range; the smaller the heating distribution density value, the larger the standard range.

[0123] Assume that the entire layout area of ​​the batch of heating rods is 5,000 square meters, and there are a total of 200 heating rods.

[0124] Calculate the heating distribution density value = 200 / 5000 = 0.04 (pieces / square meter)

[0125] Adjustment rules for determining the standard range:

[0126] Assume that the basic standard range is 625 square meters per area (that is, the number of areas initially divided is 5000 ÷ 625 = 8). And it is stipulated that for every increase of 0.01 / square meter in heating distribution density value, the standard range area decreases by 50 square meters: for every decrease of 0.01 / square meter in heating distribution density value, the standard range area increases by 50 square meters.

[0127] Adjust the standard range according to the heating distribution density value:

[0128] The current heating distribution density value is 0.04, which increases by 0.04-0.02=0.02 per square meter compared to the basic heating distribution density value (assumed to be 0.02).

[0129] Then the standard range area should be reduced by 0.02x50=10 square meters, that is, the adjusted standard range area of ​​each distribution area is 625-10=615 square meters.

[0130] The new number of distribution areas becomes 5000:615≈8.13, rounded up to 9 distribution areas.

[0131] In this way, by adjusting the standard range in an anti-correlated manner according to the heating distribution density value, the division of the layout area is made more reasonable, which can more accurately reflect the situation of the heating rods in different areas, and also help to carry out more targeted water quality monitoring and analysis in the future, further ensuring water quality safety and the normal use efficiency of the heating rods. For example, if the attenuation parameter of the heating rod in a certain area is abnormally high again in the newly divided area, we can focus more on the water quality problem investigation in that area without being disturbed by the previously coarse-grained division area.

[0132] The method further comprises the steps of:

[0133] The distribution density of the heating rods in the calculated arrangement area is the heating distribution density value, and the reference density value is adjusted according to the positive correlation of the heating distribution density value. The larger the heating distribution density value, the larger the reference density value; the smaller the heating distribution density value, the smaller the reference density value.

[0134] Assume that the basic reference density value is 0.15, and set that for every increase of 0.01 pieces / square meter in the heating distribution density value, the reference density value increases by 0.02; for every decrease of 0.01 pieces / square meter in the heating distribution density value, the reference density value decreases by 0.02.

[0135] Adjust the reference density value according to the heating distribution density value:

[0136] The current heating distribution density value is 0.04, which increases by 0.04-0.02=0.02 per square meter compared to the basic heating distribution density value (assuming the basic value corresponds to 0.02 per square meter).

[0137] Then the reference density value should be increased by 0.02x2=0.04, that is, the adjusted reference density value is 0.15+0.04=0.19. For example, when calculating the distribution density (location distribution density value) of the distribution warning area and comparing it with the reference density value, if it is judged according to the initial reference density value of 0.15, more areas may be judged to need water quality warning prompts, which may lead to unnecessary investigation work and waste of resources. However, by adjusting the reference density value according to the positive correlation of the heating distribution density value and using the new reference density value of 0.19 for judgment, it is possible to more accurately determine the areas where water quality problems may actually exist, avoid misjudgment caused by different distribution densities of heating rods, and make water quality warning prompts more reasonable and effective, so that subsequent water quality testing and treatment work can be carried out more targeted, improving the stability and reliability of the entire hot water supply system.

[0138] In other implementations, the preset reference value Sc may also be other values ​​such as 50%, which is set according to specific design requirements and usage needs.

[0139] An embodiment of the present application further discloses a system for detecting the heating efficiency of a heating rod in a water heater, comprising a processor, wherein the processor executes the steps of any of the above-mentioned methods for detecting the heating efficiency of a heating rod in a water heater.

[0140] An embodiment of the present application further discloses a storage medium, in which a program is stored. When the program is executed by a processor, the steps of any one of the above-mentioned methods for detecting the heating efficiency of a heating rod in a water heater are implemented.

[0141] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for detecting the heating efficiency of a heating rod in a water heater, characterized in that: The steps include: The voltage of the heating rod is detected to obtain a heating voltage value U, the current of the heating rod is detected to obtain a heating current value I, and a heating power value P is calculated, wherein P=U×I; The container of hot water is a heat container, and the volume value V of the heat container is obtained; the temperature of the heat container before heating is detected as the starting temperature value Tl, and the temperature of the heat container when heating is stopped is detected as the ending temperature value Th; Based on the water having the volume value V, the heating power value W1 required to heat the water from the starting temperature value Tl to the ending temperature value Th is calculated, W1=m×c×(Th-Tl), where m is the mass of water, m=V×ρ, c is the specific heat capacity of water, and ρ is the density of water; Calculate the total electric power W2 from the start of heating the hot bulb to the stop of heating the hot bulb, W2=P×t, where t is the heating time from the start of heating the hot bulb to the stop of heating the hot bulb, in seconds; Calculate the heating efficiency K of the heating rod, K=W1 / W2×100%; Obtaining a new heating efficiency Ka of the heating rod, and calculating an attenuation parameter S of the heating rod; S = (1-K / Ka) × 100%; If the attenuation parameter S is greater than the preset reference value Sc, a prompt to replace the heating rod is given; Calculate the fluctuation amplitudes of the most recent plurality of attenuation parameters S, and adjust the number of the newly produced heating rods involved in the calculation according to the positive correlation of the fluctuation amplitudes. The larger the fluctuation amplitude, the more the number of the newly produced heating rods involved in the calculation, and the smaller the fluctuation amplitude, the fewer the number of the newly produced heating rods involved in the calculation; The number of the heating rods produced in the same batch within the set geographical range is obtained as the regional number M1; Calculating the attenuation parameter S of the heating rod within the geographical range; Calculate the number of the attenuation parameters S in the area number M1 that is greater than the reference value Sc as the range warning number M1y; If the range warning quantity M1y is greater than the preset warning reference value Mc, a prompt to replace the heating rods in the area is given.

2. The method for detecting the heating efficiency of a heating rod in a water heater according to claim 1, characterized in that: The method further comprises the steps of: Obtain the heating efficiencies Ka of the most recently produced heating rods; calculate the average value of the heating efficiencies Ka as the factory heating efficiency Kb; The heating efficiency Ka is replaced by the factory heating efficiency Kb, and a new attenuation parameter S is calculated.

3. The method for detecting the heating efficiency of a heating rod in a water heater according to claim 1, characterized in that: The method further comprises the steps of: Obtain the changing trends of the most recent multiple attenuation parameters S compared with the preset rising curve, and adjust the reference value Sc in an anti-correlated manner according to the changing trends. If the changing trend decreases faster, the reference value Sc becomes smaller; if the changing trend increases slower, the reference value Sc becomes larger.

4. The method for detecting the heating efficiency of a heating rod in a water heater according to claim 1, characterized in that: The method further comprises the steps of: Obtaining the arrangement areas of the heating rods produced in the same batch, dividing the arrangement areas into a plurality of distribution areas according to a preset standard range, the number of the distribution areas being the distribution number Mf; Calculating the attenuation parameter S of all the heating rods in each of the distribution areas; Taking an average value of all the attenuation parameters S in each of the distribution areas to obtain the distribution number Mf distribution attenuation values ​​Sf; Calculate the area of ​​the distribution attenuation values ​​Sf of the distribution quantity Mf that is greater than the reference value Sc as the distribution warning area; The distribution density of the distribution warning area is calculated as a position distribution density value. If the position distribution density value is greater than a preset reference density value, a regional water quality warning prompt is issued.

5. The method for detecting the heating efficiency of a heating rod in a water heater according to claim 4, characterized in that: The method further comprises the steps of: The distribution density of the heating rods in the arrangement area is calculated as a heating distribution density value, and the standard range is adjusted inversely according to the heating distribution density value; the larger the heating distribution density value, the smaller the standard range; the smaller the heating distribution density value, the larger the standard range.

6. The method for detecting the heating efficiency of a heating rod in a water heater according to claim 4, characterized in that: The method further comprises the steps of: The distribution density of the heating rods in the arrangement area is calculated as a heating distribution density value, and the reference density value is adjusted in positive correlation with the heating distribution density value; the larger the heating distribution density value, the larger the reference density value; the smaller the heating distribution density value, the smaller the reference density value.

7. A detection system for the heating efficiency of a heating rod in a water heater, characterized in that: It comprises a processor, in which the steps of the method for detecting the heating efficiency of a heating rod in a water heater as claimed in any one of claims 1 to 6 are executed.

8. A storage medium, characterized in that: The medium stores a program, and when the program is executed by the processor, the steps of the method for detecting the heating efficiency of a heating rod in a water heater according to any one of claims 1 to 6 are implemented.

Images