A water heater scale treatment method, device, water heater and storage medium

Abstract

The embodiment of the present application provides a water scale processing method, device, water heater and storage medium, which comprises the following steps: obtaining water quality hardness detected by a water inlet conductivity sensor and water quality hardness detected by a water outlet conductivity sensor; determining a water quality hardness difference value according to the water quality hardness and the water quality hardness; determining a current thermal efficiency value in response to the water quality hardness difference value being greater than a preset water scale threshold; determining a thermal efficiency drop value according to the current thermal efficiency value; and performing descaling processing according to the thermal efficiency drop value. Through the embodiment of the present application, the water scale can be detected and processed in time, and the safety hidden danger can be eliminated, so that the safe operation of the water heater can be ensured.

Description

Technical Field

[0001] This invention relates to the field of water heater control technology, and in particular to a method for treating scale in a water heater, a device for treating scale in a water heater, a water heater, and a computer-readable storage medium. Background Technology

[0002] Because hard water contains high levels of calcium and magnesium ions, scale will form on the heat exchangers, heating elements, and other components of water heaters over time. Scale buildup has a serious negative impact on water heaters, but currently, scale detection and treatment mainly rely on user habits and are based on usage time. This means that scale cannot be removed in a timely manner, posing a safety hazard when using the water heater. Summary of the Invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide a method for treating scale in a water heater that overcomes or at least partially solves the above problems, a device for treating scale in a water heater, a water heater, and a computer-readable storage medium.

[0004] To address the aforementioned problems, in a first aspect of this invention, an embodiment of the invention discloses a method for treating scale buildup in a water heater. The water heater's inlet pipe is equipped with an inlet water conductivity sensor, and its outlet pipe is equipped with an outlet water conductivity sensor. The method includes:

[0005] The hardness of the influent water detected by the influent conductivity sensor and the hardness of the effluent water detected by the effluent conductivity sensor are obtained.

[0006] The water hardness difference is determined based on the hardness of the influent water and the hardness of the effluent water.

[0007] In response to the water hardness difference being greater than a preset scale threshold, the current thermal efficiency value is determined.

[0008] The decrease in thermal efficiency is determined based on the current thermal efficiency value;

[0009] Descaling is performed based on the aforementioned decrease in thermal efficiency.

[0010] Optionally, the step of determining the water hardness difference based on the influent water hardness and the effluent water hardness includes:

[0011] Based on the hardness difference calculation formula, the hardness of the influent water and the hardness of the effluent water are calculated to determine the hardness difference.

[0012] The formula for calculating the hardness difference is:

[0013]

[0014] Where N is the water hardness difference, with an initial value of 0; t = 0 is the start time of water use; t = i is the end time of water use; dH 进 The hardness of the influent water; dH 出 The hardness of the effluent.

[0015] Optionally, when the water heater is a gas water heater, the step of determining the current thermal efficiency value includes:

[0016] When the gas water heater has been dispensing water for a preset time, the following parameters are measured: water volume, water temperature, inlet water temperature, low calorific value of gas, gas flow rate, gas temperature, and gas pressure.

[0017] Based on the formula for calculating the thermal efficiency of a gas water heater, the current thermal efficiency value is determined according to the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow rate, gas temperature, and gas pressure.

[0018] The formula for calculating the thermal efficiency of a gas water heater is as follows:

[0019]

[0020] Where, η t The current thermal efficiency value is given; C is the specific heat capacity of water; M is the outflow rate; t w2 The outlet water temperature; t w1 Inlet water temperature; Q1 is the minimum calorific value of the gas; V is the gas flow rate; t g P represents the gas temperature. a Pg is atmospheric pressure; S is the gas pressure; t is temperature. g Saturated vapor pressure at time.

[0021] Optionally, when the water heater is an electric water heater, the step of determining the current thermal efficiency value includes:

[0022] Detect the initial water temperature;

[0023] After the electric water heater has finished heating, check the water quality, target water temperature, and heating time.

[0024] The temperature change value is determined based on the target water temperature and the initial water temperature;

[0025] Based on the formula for calculating the thermal efficiency of an electric water heater, the current thermal efficiency value is determined according to the water mass, the water temperature change value, and the heating time.

[0026] The formula for calculating the thermal efficiency of the electric water heater is as follows:

[0027] η t =(m*c*(ΔT)) / (p*t)*100%

[0028] Where, η t denoted as water mass; C as water specific heat capacity; ΔT as water temperature change; p as power of the electric water heater; and t as heating time.

[0029] Optionally, the step of determining the decrease in thermal efficiency based on the current thermal efficiency value includes:

[0030] Determine the thermal efficiency threshold;

[0031] The decrease in thermal efficiency is determined based on the quotient of the current thermal efficiency value and the thermal efficiency threshold.

[0032] Optionally, the step of descaling based on the decrease in thermal efficiency includes:

[0033] In response to the thermal efficiency decrease value being greater than a first decrease threshold and not greater than a second decrease threshold, a descaling reminder message is generated; the second decrease threshold is greater than the first decrease threshold.

[0034] Increase the preset scale threshold, and then execute the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold, until the water hardness difference is cleared to zero.

[0035] Optionally, the step of descaling based on the decrease in thermal efficiency further includes:

[0036] In response to the thermal efficiency decrease value exceeding a preset second decrease threshold, descaling guidance information is generated.

[0037] In a second aspect, an embodiment of the present invention discloses a water heater scale removal device, wherein an inlet water conductivity sensor is provided in the inlet pipe of the water heater, and an outlet water conductivity sensor is provided in the outlet pipe. The device includes:

[0038] The acquisition module is used to acquire the influent water hardness detected by the influent conductivity sensor and the effluent water hardness detected by the effluent conductivity sensor.

[0039] The first calculation module is used to determine the difference in water hardness based on the hardness of the influent water and the hardness of the effluent water.

[0040] The second calculation module is used to calculate the current thermal efficiency value in response to the water hardness difference being greater than a preset scale threshold.

[0041] The third calculation module is used to determine the decrease in thermal efficiency based on the current thermal efficiency value;

[0042] The processing module is used to perform descaling based on the decrease in thermal efficiency.

[0043] Optionally, the first computing module includes:

[0044] The first calculation submodule is used to calculate the hardness of the influent water and the hardness of the effluent water based on the hardness difference calculation formula, and to determine the hardness difference of the water.

[0045] The formula for calculating the hardness difference is:

[0046]

[0047] Where N is the water hardness difference, with an initial value of 0; t = 0 is the start time of water use; t = i is the end time of water use; dH 进 The hardness of the influent water; dH 出 The hardness of the effluent.

[0048] Optionally, when the water heater is a gas water heater, the second calculation module includes:

[0049] The first detection submodule is used to detect the water output, water output temperature, water inlet temperature, low calorific value of gas, gas flow rate, gas temperature, and gas pressure when the gas water heater has been discharging water for a preset time.

[0050] The second calculation submodule is used to determine the current thermal efficiency value based on the gas water heater thermal efficiency calculation formula, according to the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow rate, gas temperature, and gas pressure.

[0051] The formula for calculating the thermal efficiency of a gas water heater is as follows:

[0052]

[0053] Where, η t The current thermal efficiency value is given; C is the specific heat capacity of water; M is the outflow rate; t w2 The outlet water temperature; t w1 Inlet water temperature; Q1 is the minimum calorific value of the gas; V is the gas flow rate; t g P represents the gas temperature. a Pg is atmospheric pressure; S is the gas pressure; t is temperature. g Saturated vapor pressure at time.

[0054] Optionally, when the water heater is an electric water heater, the second calculation module includes:

[0055] The second detection submodule is used to detect the initial water temperature;

[0056] The third detection submodule is used to detect water quality, target water temperature and heating time after the electric water heater has finished heating.

[0057] The third calculation submodule is used to determine the temperature change value based on the target water temperature and the initial water temperature;

[0058] The fourth calculation submodule is used to determine the current thermal efficiency value based on the electric water heater thermal efficiency calculation formula, the water quality, the water temperature change value, and the heating time.

[0059] The formula for calculating the thermal efficiency of the electric water heater is as follows:

[0060] η t =(m*c*(ΔT)) / (p*t)*100%

[0061] Where, η t denoted as water mass; C as water specific heat capacity; ΔT as water temperature change; p as power of the electric water heater; and t as heating time.

[0062] Optionally, the third computing module includes:

[0063] The determination submodule is used to determine the thermal efficiency threshold;

[0064] The fifth calculation submodule is used to determine the decrease in thermal efficiency based on the quotient of the current thermal efficiency value and the thermal efficiency threshold.

[0065] Optionally, the processing module includes:

[0066] The first processing submodule is used to generate a descaling reminder message in response to the thermal efficiency decrease value being greater than a first decrease threshold and not greater than a second decrease threshold; the second decrease threshold is greater than the first decrease threshold.

[0067] The second processing submodule is used to increase the preset scale threshold, and then execute the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold, until the water hardness difference is cleared to zero.

[0068] Optionally, the processing module further includes:

[0069] The third processing submodule is used to generate descaling guidance information in response to the thermal efficiency decrease value being greater than a preset second decrease threshold.

[0070] In a third aspect of the present invention, an embodiment of the present invention discloses a water heater, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the water heater scale removal method as described above.

[0071] In a fourth aspect, embodiments of the present invention disclose a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the water heater scale removal method as described above.

[0072] The embodiments of the present invention have the following advantages:

[0073] This invention acquires the hardness of the inlet water detected by an inlet water conductivity sensor and the hardness of the outlet water detected by an outlet water conductivity sensor; determines the hardness difference based on the inlet and outlet water hardness; determines the current thermal efficiency value in response to the hardness difference exceeding a preset scale threshold; determines the thermal efficiency decrease value based on the current thermal efficiency value; and performs descaling treatment based on the thermal efficiency decrease value. By real-time monitoring of the inlet and outlet water hardness detected by the inlet and outlet water conductivity sensors, scale is detected based on the hardness difference, thereby monitoring scale formation. When scale formation leads to a decrease in thermal efficiency, corresponding scale treatment is performed, allowing users to promptly address scale buildup in their water heaters, eliminating safety hazards and ensuring safe operation. Timely scale removal also improves the heating efficiency and reduces energy consumption of the water heater. Attached Figure Description

[0074] Figure 1 This is a flowchart illustrating the steps of an embodiment of a water heater scale removal method according to the present invention;

[0075] Figure 2 This is a flowchart illustrating the steps of another embodiment of the water heater scale removal method of the present invention;

[0076] Figure 3 This is a schematic diagram of a water heater system.

[0077] Figure 4 This is a diagram illustrating limescale buildup.

[0078] Figure 5 This is a schematic flowchart illustrating an example of a water heater scale removal method according to the present invention;

[0079] Figure 6 This is a structural block diagram of an embodiment of a water heater scale removal device according to the present invention;

[0080] Figure 7 This is a structural block diagram of a water heater provided in an embodiment of the present invention;

[0081] Figure 8 This is a structural block diagram of a storage medium provided in an embodiment of the present invention. Detailed Implementation

[0082] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0083] Reference Figure 1 This diagram illustrates a flowchart of an embodiment of a water heater scale removal method according to the present invention. An inlet water conductivity sensor is installed in the water inlet pipe of the water heater, and an outlet water conductivity sensor is installed in the water outlet pipe. The inlet and outlet water conductivity sensors can be the same conductivity sensor. Specific types include, but are not limited to, electrode-type conductivity sensors, inductive conductivity sensors, and ultrasonic conductivity sensors.

[0084] Electrode-type conductivity sensors are based on the principle of electrolytic conduction and use resistance measurement to measure conductivity. They can include two-electrode types: consisting of a pair of electrodes, with a constant voltage applied across them, and conductivity calculated by measuring the change in current between the electrodes. They have a wide measurement range, but different electrode constants result in different ranges. For example, with an electrode constant of 0.01 / cm, the measurement range is 0–20 μS / cm; with an electrode constant of 1.0 / cm, the measurement range is 10–20000 μS / cm. Four-electrode types can also be included: consisting of two current electrodes and two voltage electrodes, with the voltage and current electrodes coaxial. Conductivity is calculated by measuring the current between the current electrodes and the voltage across the voltage electrodes, utilizing the linear relationship between them. Inductive conductivity sensors are based on the principle of electromagnetic induction, calculating conductivity by measuring the ratio between the induced voltage and the excitation voltage. Ultrasonic conductivity sensors measure conductivity based on the relationship between the propagation characteristics of ultrasound in liquids (such as velocity and attenuation).

[0085] The method for removing scale from water heaters may specifically include the following steps:

[0086] Step 101: Obtain the influent water hardness detected by the influent conductivity sensor and the effluent water hardness detected by the effluent conductivity sensor;

[0087] The system can separately acquire the influent water hardness detected by the influent conductivity sensor and the effluent water hardness detected by the effluent conductivity sensor. The influent water hardness is the hardness of the water detected in the influent pipe; the effluent water hardness is the hardness of the water detected in the effluent pipe.

[0088] Step 102: Determine the water hardness difference based on the influent water hardness and the effluent water hardness;

[0089] Based on the difference in hardness between the inlet and outlet water, the change in water hardness between the inlet and outlet pipes of the water heater is determined, resulting in a water hardness difference value. This water hardness difference value can be used to determine the amount of limescale remaining in the water heater and adhering to its pipes.

[0090] Step 103: In response to the water hardness difference being greater than a preset scale threshold, determine the current thermal efficiency value;

[0091] The system determines whether the water hardness difference exceeds a preset scale threshold. If the difference is not greater than the threshold, it indicates minimal residue and minimal impact on the water heater, requiring no treatment. If the difference exceeds the threshold, it also indicates minimal residue, but scale will affect the water heater. The system can determine the water heater's current thermal efficiency when the hardness difference exceeds the threshold. This current thermal efficiency is the water heater's efficiency at the current moment. The preset scale threshold can be determined based on the water heater's specific structure and can be obtained through pre-testing; no specific value is required.

[0092] Step 104: Determine the decrease in thermal efficiency based on the current thermal efficiency value;

[0093] Based on the current thermal efficiency value, the decline in the water heater's thermal efficiency relative to the specified rated thermal efficiency is determined, generating a thermal efficiency decline value. In other words, the thermal efficiency decline value characterizes the current degree of decline in the water heater's thermal efficiency.

[0094] Step 105: Perform descaling treatment based on the decrease in thermal efficiency.

[0095] Based on the decrease in thermal efficiency, different levels of thermal efficiency degradation are determined, and different descaling treatments are then adopted to ensure timely treatment of scale.

[0096] This invention acquires the hardness of the inlet water detected by an inlet water conductivity sensor and the hardness of the outlet water detected by an outlet water conductivity sensor; determines the hardness difference based on the inlet and outlet water hardness; determines the current thermal efficiency value in response to the hardness difference exceeding a preset scale threshold; determines the thermal efficiency decrease value based on the current thermal efficiency value; and performs descaling treatment based on the thermal efficiency decrease value. By real-time monitoring of the inlet and outlet water hardness detected by the inlet and outlet water conductivity sensors, scale is detected based on the hardness difference, thereby monitoring scale formation. When scale formation leads to a decrease in thermal efficiency, corresponding scale treatment is performed, allowing users to promptly address scale buildup in their water heaters, eliminating safety hazards and ensuring safe operation. Timely scale removal also improves the heating efficiency and reduces energy consumption of the water heater.

[0097] Reference Figure 2 The diagram illustrates a flowchart of another embodiment of the water heater scale removal method of the present invention. An inlet water conductivity sensor is installed in the water inlet pipe of the water heater, and an outlet water conductivity sensor is installed in the outlet pipe. See also... Figure 3 The inlet water conductivity sensor is installed inside the inlet water pipe, and the outlet water conductivity sensor is installed inside the outlet water pipe. One end of the heat exchanger is connected to the inlet water pipe, and the other end is connected to the outlet water pipe. Scale buildup adheres to the inside of the heat exchanger. Figure 4 As shown, scale adheres to the internal pipes of the heat exchanger.

[0098] The method for removing scale from water heaters may specifically include the following steps:

[0099] Step 201: Obtain the influent water hardness detected by the influent conductivity sensor and the effluent water hardness detected by the effluent conductivity sensor;

[0100] First, the hardness of the influent water detected by the influent conductivity sensor and the hardness of the effluent water detected by the effluent conductivity sensor can be obtained. Specifically, based on the sensor types of the influent and effluent conductivity sensors, the signal magnitude of the sensors can be converted into the corresponding water hardness. Furthermore, the influent and effluent conductivity sensors detect water hardness in real time while the user is using water.

[0101] Step 202: Determine the water hardness difference based on the hardness of the influent water and the hardness of the effluent water;

[0102] The system can calculate and accumulate the water hardness difference based on real-time monitoring of the influent and effluent water hardness during user water usage. This water hardness difference is used to determine the formation and removal of limescale. The initial value of the water hardness difference is 0, meaning there is no limescale.

[0103] Specifically, the step of determining the water hardness difference based on the hardness of the influent water and the hardness of the effluent water includes: calculating the hardness of the influent water and the hardness of the effluent water based on the hardness difference calculation formula, and determining the water hardness difference.

[0104] The formula for calculating the hardness difference is:

[0105]

[0106] Where N is the water hardness difference, with an initial value of 0; t = 0 is the start time of water use; t = i is the end time of water use; dH 进 The hardness of the influent water; dH 出 The hardness of the effluent.

[0107] In practical applications, the hardness difference of the effluent can be determined cumulatively based on the above hardness difference calculation formula, taking into account the hardness of the influent and effluent water during the user's water usage period.

[0108] Step 203: In response to the water hardness difference being greater than a preset scale threshold, determine the current thermal efficiency value;

[0109] Determine if the water hardness difference is greater than the preset scale threshold. If the water hardness difference is greater than the preset scale threshold, calculate and determine the current thermal efficiency value to assess the decrease in thermal efficiency.

[0110] Different methods can be used to determine the current thermal efficiency value for different types of water heaters.

[0111] In one example of the present invention, when the water heater is a gas water heater, the step of determining the current thermal efficiency value includes: after the gas water heater has been discharging water for a preset time, detecting the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow rate, gas temperature, and gas pressure; and determining the current thermal efficiency value based on the gas water heater thermal efficiency calculation formula, according to the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow rate, gas temperature, and gas pressure.

[0112] The formula for calculating the thermal efficiency of a gas water heater is as follows:

[0113]

[0114] Where, η t The current thermal efficiency value is given; C is the specific heat capacity of water; M is the outflow rate; t w2 The outlet water temperature; t w1 Inlet water temperature; Q1 is the minimum calorific value of the gas; V is the gas flow rate; t g P represents the gas temperature. a Pg is atmospheric pressure; S is the gas pressure; t is temperature. g Saturated vapor pressure at time.

[0115] When calculating the thermal efficiency of a gas water heater, the system can wait for a preset time to allow the water temperature and flow rate to stabilize before measuring the water flow rate, outlet temperature, inlet temperature, gas low calorific value, gas flow rate, gas temperature, and gas pressure. This preset time is determined based on the specific design of the gas water heater, and this embodiment of the invention does not impose a specific limitation on it. Then, the water flow rate, outlet temperature, inlet temperature, gas low calorific value, gas flow rate, gas temperature, and gas pressure are combined and substituted into the gas water heater thermal efficiency calculation formula to calculate the corresponding current thermal efficiency value. The gas low calorific value, gas flow rate, gas temperature, and gas pressure can be pre-determined through experiments with a gas flow meter on the gas water heater. The specific heat capacity of water is 4.19*10⁻⁶. -3 MJ / (kg·K). Water output is measured in kilograms per minute (kg / min); gas temperature, outlet water temperature, and inlet water temperature are measured in degrees Celsius (°C); the low calorific value of the gas is measured in megajoules per cubic meter (MJ / m³). 3 The unit for gas flow rate is cubic meters per minute (m³ / min). 3 / min); the units for gas pressure and steam pressure are kilopascals (kPa).

[0116] In one example of the present invention, when the water heater is an electric water heater, the step of determining the current thermal efficiency value includes: detecting the initial water temperature; after the electric water heater has finished heating, detecting the water quality, the target water temperature, and the heating time; determining the temperature change value based on the target water temperature and the initial water temperature; and determining the current thermal efficiency value based on the electric water heater thermal efficiency calculation formula, according to the water quality, the water temperature change value, and the heating time.

[0117] The formula for calculating the thermal efficiency of the electric water heater is as follows:

[0118] η t =(m*c*(ΔT)) / (p*t)*100%

[0119] Where, η t denoted as water mass; C as water specific heat capacity; ΔT as water temperature change; p as power of the electric water heater; and t as heating time.

[0120] When the water heater is electric, the initial water temperature before heating can be detected first. After heating is complete, the water quality, the target water temperature reached, and the heating time from the initial temperature to the target temperature can be measured. The difference between the target temperature and the initial temperature is calculated and defined as the temperature change. Then, based on the electric water heater's thermal efficiency calculation formula, the water quality, temperature change, and heating time are substituted to calculate the current thermal efficiency value of the water heater under its current scale-laden state.

[0121] Step 204: Determine the decrease in thermal efficiency based on the current thermal efficiency value;

[0122] Based on the current thermal efficiency value, the extent of the decrease in thermal efficiency can be determined, and the value of the decrease in thermal efficiency can be identified.

[0123] Specifically, the step of determining the thermal efficiency decrease value based on the current thermal efficiency value may include: determining a thermal efficiency threshold; and determining the thermal efficiency decrease value based on the quotient of the current thermal efficiency value and the thermal efficiency threshold.

[0124] First, the thermal efficiency threshold can be determined. The thermal efficiency threshold is the thermal efficiency value recorded by the water heater according to the rated thermal efficiency test standard before it leaves the factory.

[0125] The quotient of the current thermal efficiency value and the thermal efficiency threshold is calculated to determine the decrease in thermal efficiency. Furthermore, this can be expressed as a percentage. For example, the quotient of the current thermal efficiency value and the thermal efficiency threshold is calculated, and the percentage decrease in thermal efficiency is determined by subtracting 1 from the quotient.

[0126] Step 205: In response to the thermal efficiency decrease value being greater than a first decrease threshold and not greater than a second decrease threshold, a descaling reminder message is generated; the second decrease threshold is greater than the first decrease threshold.

[0127] Different treatments are applied based on different thermal efficiency reduction values. When the thermal efficiency reduction value is greater than a first reduction threshold but not greater than a second reduction threshold, it indicates that the current scale is affecting the heating efficiency of the water heater, but the harm is minor. A descaling reminder message can be generated to remind the user to remove the scale. The specific content of the descaling reminder message includes, but is not limited to, descaling symbols to remind the user to remove scale. This embodiment of the invention does not specifically limit this. The second reduction threshold is greater than the first reduction threshold. The first and second reduction thresholds can be pre-determined based on the classification of the water heater's thermal efficiency reduction status. Furthermore, to more precisely classify and judge the thermal efficiency reduction caused by scale, a third reduction threshold can be set between the first and second reduction thresholds, etc. Multiple different thresholds are used to classify the degree of scale adhesion, thereby further refining the classification of scale adhesion and implementing more precise treatment. For example, the first and second reduction thresholds can be 5% and 20%, respectively; the third threshold can be 10%.

[0128] Furthermore, if the decrease in thermal efficiency is less than the first decrease threshold, it indicates that the current scale adhesion state has little impact on thermal efficiency, and descaling is not necessary.

[0129] Step 206: Increase the preset scale threshold, and execute the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold, until the water hardness difference is cleared to zero.

[0130] While generating descaling reminder messages, the preset scale threshold can also be increased. The increased preset scale threshold is used to execute the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold, until the water hardness difference is cleared to zero. This allows the user to be reasonably reminded to descale the next time they use the water, thus avoiding the repeated generation of descaling reminder messages.

[0131] Step 207: In response to the thermal efficiency decrease value being greater than a preset second decrease threshold, descaling guidance information is generated.

[0132] When the decrease in thermal efficiency exceeds the preset second threshold, it indicates that scale buildup has significantly reduced the water heater's performance, requiring immediate descaling. Descaling guidance information will be generated to warn and notify the user to perform descaling immediately, along with relevant information such as water heater malfunction indicators and after-sales service hotline.

[0133] For example, a 5%-10% decrease in thermal efficiency indicates slight to moderate scale buildup on the heat exchanger surface. In this case, a thin layer of scale may form on the heat exchanger tube walls; this has minimal impact on user operation and no treatment is recommended.

[0134] A 10%-20% decrease in thermal efficiency indicates that scale may have accumulated to a medium to thick layer. The scale has seriously affected the heat transfer between the hot water and the heat source, requiring the water heater to consume more energy to achieve the same heating effect. This increases energy waste and significantly raises operating costs. In this case, it is recommended that users perform descaling.

[0135] A decrease in thermal efficiency greater than 20% indicates that limescale buildup has significantly weakened the water heater's performance, potentially affecting the normal hot water supply. At this point, the water heater's energy consumption will increase significantly, and user satisfaction may be negatively impacted due to the low heating efficiency. This is a sign that limescale buildup is causing serious negative effects on the water heater, requiring immediate cleaning measures; otherwise, it will affect the normal operation and lifespan of the water heater, and may even lead to equipment damage.

[0136] To enable those skilled in the art to clearly understand the implementation process of the present invention, the following example is used for illustration:

[0137] You can refer to Figure 5The diagram illustrates a flow chart of an example of a water heater scale removal method according to the present invention. The method involves real-time monitoring and accumulation of the difference N between the hardness of the inlet and outlet water during user water usage. When the amount of scale adhering to the pipes exceeds B, the user is prompted to contact after-sales service for descaling.

[0138] Gas water heaters record their thermal efficiency value η according to the rated thermal efficiency test standard before leaving the factory. 阈值 When the amount of scale buildup in the pipe exceeds B, the user can access the thermal efficiency calculation interface and input the unknown parameter P. a V, Pg, t g Turn on the tap and test the thermal efficiency value η based on the rated thermal efficiency test standard. 测试 Then calculate the percentage decrease in thermal efficiency (1-η). 测试 / η 阈值 The test measures 100% of the scale buildup inside the user's gas water heater, then displays the percentage decrease in thermal efficiency and provides user guidance.

[0139] Specifically, when a user enters the thermal efficiency calculation interface and finds a 5%-10% decrease in thermal efficiency, if no descaling has been performed, the B value (preset scale threshold) will be increased by 0.5 times to provide a judgment value for the next descaling reminder, while the N value (water hardness difference) will remain unchanged. If descaling has been performed, the N value will be reset to zero, and the B value will remain unchanged. When a user enters the thermal efficiency calculation interface and finds a 10%-20% decrease in thermal efficiency, if no descaling has been performed, the B value will be increased by 0.25 times to provide a judgment value for the next descaling reminder, while the N value will remain unchanged. If descaling has been performed, the N value will be reset to zero, and the B value will remain unchanged. When a user enters the thermal efficiency calculation interface and finds a decrease in thermal efficiency greater than 20%, if no descaling has been performed, a descaling reminder will be received every time the gas water heater is used. If descaling has been performed, the N value will be reset to zero, and the B value will remain unchanged.

[0140] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0141] Reference Figure 6 The diagram shows a structural block diagram of an embodiment of a water heater scale removal device according to the present invention. The water heater has an inlet water conductivity sensor installed in its inlet pipe and an outlet water conductivity sensor installed in its outlet pipe. The water heater scale removal device may specifically include the following modules:

[0142] The acquisition module 601 is used to acquire the influent water hardness detected by the influent conductivity sensor and the effluent water hardness detected by the effluent conductivity sensor.

[0143] The first calculation module 602 is used to determine the water hardness difference based on the hardness of the influent water and the hardness of the effluent water.

[0144] The second calculation module 603 is used to calculate the current thermal efficiency value in response to the water hardness difference being greater than a preset scale threshold.

[0145] The third calculation module 604 is used to determine the decrease in thermal efficiency based on the current thermal efficiency value;

[0146] Processing module 605 is used to perform descaling treatment based on the decrease in thermal efficiency.

[0147] In an optional embodiment of the present invention, the first computing module 602 includes:

[0148] The first calculation submodule is used to calculate the hardness of the influent water and the hardness of the effluent water based on the hardness difference calculation formula, and to determine the hardness difference of the water.

[0149] The formula for calculating the hardness difference is:

[0150]

[0151] Where N is the water hardness difference, with an initial value of 0; t = 0 is the start time of water use; t = i is the end time of water use; dH 进 The hardness of the influent water; dH 出 The hardness of the effluent.

[0152] In an optional embodiment of the present invention, when the water heater is a gas water heater, the second calculation module 603 includes:

[0153] The first detection submodule is used to detect the water output, water output temperature, water inlet temperature, low calorific value of gas, gas flow rate, gas temperature, and gas pressure when the gas water heater has been discharging water for a preset time.

[0154] The second calculation submodule is used to determine the current thermal efficiency value based on the gas water heater thermal efficiency calculation formula, according to the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow rate, gas temperature, and gas pressure.

[0155] The formula for calculating the thermal efficiency of a gas water heater is as follows:

[0156]

[0157] Where, ηt The current thermal efficiency value is given; C is the specific heat capacity of water; M is the outflow rate; t w2 The outlet water temperature; t w1 Inlet water temperature; Q1 is the minimum calorific value of the gas; V is the gas flow rate; t g P represents the gas temperature. a Pg is atmospheric pressure; S is the gas pressure; t is temperature. g Saturated vapor pressure at time.

[0158] In an optional embodiment of the present invention, when the water heater is an electric water heater, the second calculation module 603 includes:

[0159] The second detection submodule is used to detect the initial water temperature;

[0160] The third detection submodule is used to detect water quality, target water temperature and heating time after the electric water heater has finished heating.

[0161] The third calculation submodule is used to determine the temperature change value based on the target water temperature and the initial water temperature;

[0162] The fourth calculation submodule is used to determine the current thermal efficiency value based on the electric water heater thermal efficiency calculation formula, the water quality, the water temperature change value, and the heating time.

[0163] The formula for calculating the thermal efficiency of the electric water heater is as follows:

[0164] η t =(m*c*(ΔT)) / (p*t)*100%

[0165] Where, η t denoted as water mass; C as water specific heat capacity; ΔT as water temperature change; p as power of the electric water heater; and t as heating time.

[0166] In an optional embodiment of the present invention, the third computing module 604 includes:

[0167] The determination submodule is used to determine the thermal efficiency threshold;

[0168] The fifth calculation submodule is used to determine the decrease in thermal efficiency based on the quotient of the current thermal efficiency value and the thermal efficiency threshold.

[0169] In an optional embodiment of the present invention, the processing module 605 includes:

[0170] The first processing submodule is used to generate a descaling reminder message in response to the thermal efficiency decrease value being greater than a first decrease threshold and not greater than a second decrease threshold; the second decrease threshold is greater than the first decrease threshold.

[0171] The second processing submodule is used to increase the preset scale threshold, and then execute the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold, until the water hardness difference is cleared to zero.

[0172] In an optional embodiment of the present invention, the processing module 605 further includes:

[0173] The third processing submodule is used to generate descaling guidance information in response to the thermal efficiency decrease value being greater than a preset second decrease threshold.

[0174] This invention acquires the hardness of the inlet water detected by an inlet water conductivity sensor and the hardness of the outlet water detected by an outlet water conductivity sensor; determines the hardness difference based on the inlet and outlet water hardness; determines the current thermal efficiency value in response to the hardness difference exceeding a preset scale threshold; determines the thermal efficiency decrease value based on the current thermal efficiency value; and performs descaling treatment based on the thermal efficiency decrease value. By real-time monitoring of the inlet and outlet water hardness detected by the inlet and outlet water conductivity sensors, scale is detected based on the hardness difference, thereby monitoring scale formation. When scale formation leads to a decrease in thermal efficiency, corresponding scale treatment is performed, allowing users to promptly address scale buildup in their water heaters, eliminating safety hazards and ensuring safe operation. Timely scale removal also improves the heating efficiency and reduces energy consumption of the water heater.

[0175] As the device embodiment is basically similar to the method embodiment, the description is relatively simple, and relevant parts can be found in the description of the method embodiment.

[0176] Reference Figure 7 The present invention also provides a water heater, comprising:

[0177] The processor 701 and the storage medium 702 store a computer program executable by the processor 701. When the water heater is running, the processor 701 executes the computer program to implement the water heater scale removal method as described in any of the embodiments of the present invention.

[0178] The water heater is equipped with an inlet water conductivity sensor in its inlet pipe and an outlet water conductivity sensor in its outlet pipe. The water heater scale removal method includes:

[0179] The hardness of the influent water detected by the influent conductivity sensor and the hardness of the effluent water detected by the effluent conductivity sensor are obtained.

[0180] The water hardness difference is determined based on the hardness of the influent water and the hardness of the effluent water.

[0181] In response to the water hardness difference being greater than a preset scale threshold, the current thermal efficiency value is determined.

[0182] The decrease in thermal efficiency is determined based on the current thermal efficiency value;

[0183] Descaling is performed based on the aforementioned decrease in thermal efficiency.

[0184] Optionally, the step of determining the water hardness difference based on the influent water hardness and the effluent water hardness includes:

[0185] Based on the hardness difference calculation formula, the hardness of the influent water and the hardness of the effluent water are calculated to determine the hardness difference.

[0186] The formula for calculating the hardness difference is:

[0187]

[0188] Where N is the water hardness difference, with an initial value of 0; t = 0 is the start time of water use; t = i is the end time of water use; dH 进 The hardness of the influent water; dH 出 The hardness of the effluent.

[0189] Optionally, when the water heater is a gas water heater, the step of determining the current thermal efficiency value includes:

[0190] When the gas water heater has been dispensing water for a preset time, the following parameters are measured: water volume, water temperature, inlet water temperature, low calorific value of gas, gas flow rate, gas temperature, and gas pressure.

[0191] Based on the formula for calculating the thermal efficiency of a gas water heater, the current thermal efficiency value is determined according to the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow rate, gas temperature, and gas pressure.

[0192] The formula for calculating the thermal efficiency of a gas water heater is as follows:

[0193]

[0194] Where, η t The current thermal efficiency value is given; C is the specific heat capacity of water; M is the outflow rate; t w2 The outlet water temperature; t w1 Inlet water temperature; Q1 is the minimum calorific value of the gas; V is the gas flow rate; t g P represents the gas temperature. a Pg is atmospheric pressure; S is the gas pressure; t is temperature.g Saturated vapor pressure at time.

[0195] Optionally, when the water heater is an electric water heater, the step of determining the current thermal efficiency value includes:

[0196] Detect the initial water temperature;

[0197] After the electric water heater has finished heating, check the water quality, target water temperature, and heating time.

[0198] The temperature change value is determined based on the target water temperature and the initial water temperature;

[0199] Based on the formula for calculating the thermal efficiency of an electric water heater, the current thermal efficiency value is determined according to the water mass, the water temperature change value, and the heating time.

[0200] The formula for calculating the thermal efficiency of the electric water heater is as follows:

[0201] η t =(m*c*(ΔT)) / (p*t)*100%

[0202] Where, η t denoted as water mass; C as water specific heat capacity; ΔT as water temperature change; p as power of the electric water heater; and t as heating time.

[0203] Optionally, the step of determining the decrease in thermal efficiency based on the current thermal efficiency value includes:

[0204] Determine the thermal efficiency threshold;

[0205] The decrease in thermal efficiency is determined based on the quotient of the current thermal efficiency value and the thermal efficiency threshold.

[0206] Optionally, the step of descaling based on the decrease in thermal efficiency includes:

[0207] In response to the thermal efficiency decrease value being greater than a first decrease threshold and not greater than a second decrease threshold, a descaling reminder message is generated; the second decrease threshold is greater than the first decrease threshold.

[0208] Increase the preset scale threshold, and then execute the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold, until the water hardness difference is cleared to zero.

[0209] Optionally, the step of descaling based on the decrease in thermal efficiency further includes:

[0210] In response to the thermal efficiency decrease value exceeding a preset second decrease threshold, descaling guidance information is generated.

[0211] This invention acquires the hardness of the inlet water detected by an inlet water conductivity sensor and the hardness of the outlet water detected by an outlet water conductivity sensor; determines the hardness difference based on the inlet and outlet water hardness; determines the current thermal efficiency value in response to the hardness difference exceeding a preset scale threshold; determines the thermal efficiency decrease value based on the current thermal efficiency value; and performs descaling treatment based on the thermal efficiency decrease value. By real-time monitoring of the inlet and outlet water hardness detected by the inlet and outlet water conductivity sensors, scale is detected based on the hardness difference, thereby monitoring scale formation. When scale formation leads to a decrease in thermal efficiency, corresponding scale treatment is performed, allowing users to promptly address scale buildup in their water heaters, eliminating safety hazards and ensuring safe operation. Timely scale removal also improves the heating efficiency and reduces energy consumption of the water heater.

[0212] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0213] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0214] Reference Figure 8 The present invention also provides a computer-readable storage medium 801, on which a computer program is stored, and the computer program is executed by a processor to perform the water heater scale removal method as described in any one of the embodiments of the present invention.

[0215] The water heater is equipped with an inlet water conductivity sensor in its inlet pipe and an outlet water conductivity sensor in its outlet pipe. The water heater scale removal method includes:

[0216] The hardness of the influent water detected by the influent conductivity sensor and the hardness of the effluent water detected by the effluent conductivity sensor are obtained.

[0217] The water hardness difference is determined based on the hardness of the influent water and the hardness of the effluent water.

[0218] In response to the water hardness difference being greater than a preset scale threshold, the current thermal efficiency value is determined.

[0219] The decrease in thermal efficiency is determined based on the current thermal efficiency value;

[0220] Descaling is performed based on the aforementioned decrease in thermal efficiency.

[0221] Optionally, the step of determining the water hardness difference based on the influent water hardness and the effluent water hardness includes:

[0222] Based on the hardness difference calculation formula, the hardness of the influent water and the hardness of the effluent water are calculated to determine the hardness difference.

[0223] The formula for calculating the hardness difference is:

[0224]

[0225] Where N is the water hardness difference, with an initial value of 0; t = 0 is the start time of water use; t = i is the end time of water use; dH 进 The hardness of the influent water; dH 出 The hardness of the effluent.

[0226] Optionally, when the water heater is a gas water heater, the step of determining the current thermal efficiency value includes:

[0227] When the gas water heater has been dispensing water for a preset time, the following parameters are measured: water volume, water temperature, inlet water temperature, low calorific value of gas, gas flow rate, gas temperature, and gas pressure.

[0228] Based on the formula for calculating the thermal efficiency of a gas water heater, the current thermal efficiency value is determined according to the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow rate, gas temperature, and gas pressure.

[0229] The formula for calculating the thermal efficiency of a gas water heater is as follows:

[0230]

[0231] Where, η t The current thermal efficiency value is given; C is the specific heat capacity of water; M is the outflow rate; t w2 The outlet water temperature; t w1Inlet water temperature; Q1 is the minimum calorific value of the gas; V is the gas flow rate; t g P represents the gas temperature. a Pg is atmospheric pressure; S is the gas pressure; t is temperature. g Saturated vapor pressure at time.

[0232] Optionally, when the water heater is an electric water heater, the step of determining the current thermal efficiency value includes:

[0233] Detect the initial water temperature;

[0234] After the electric water heater has finished heating, check the water quality, target water temperature, and heating time.

[0235] The temperature change value is determined based on the target water temperature and the initial water temperature;

[0236] Based on the formula for calculating the thermal efficiency of an electric water heater, the current thermal efficiency value is determined according to the water mass, the water temperature change value, and the heating time.

[0237] The formula for calculating the thermal efficiency of the electric water heater is as follows:

[0238] η t =(m*c*(ΔT)) / (p*t)*100%

[0239] Where, η t denoted as water mass; C as water specific heat capacity; ΔT as water temperature change; p as power of the electric water heater; and t as heating time.

[0240] Optionally, the step of determining the decrease in thermal efficiency based on the current thermal efficiency value includes:

[0241] Determine the thermal efficiency threshold;

[0242] The decrease in thermal efficiency is determined based on the quotient of the current thermal efficiency value and the thermal efficiency threshold.

[0243] Optionally, the step of descaling based on the decrease in thermal efficiency includes:

[0244] In response to the thermal efficiency decrease value being greater than a first decrease threshold and not greater than a second decrease threshold, a descaling reminder message is generated; the second decrease threshold is greater than the first decrease threshold.

[0245] Increase the preset scale threshold, and then execute the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold, until the water hardness difference is cleared to zero.

[0246] Optionally, the step of descaling based on the decrease in thermal efficiency further includes:

[0247] In response to the thermal efficiency decrease value exceeding a preset second decrease threshold, descaling guidance information is generated.

[0248] This invention acquires the hardness of the inlet water detected by an inlet water conductivity sensor and the hardness of the outlet water detected by an outlet water conductivity sensor; determines the hardness difference based on the inlet and outlet water hardness; determines the current thermal efficiency value in response to the hardness difference exceeding a preset scale threshold; determines the thermal efficiency decrease value based on the current thermal efficiency value; and performs descaling treatment based on the thermal efficiency decrease value. By real-time monitoring of the inlet and outlet water hardness detected by the inlet and outlet water conductivity sensors, scale is detected based on the hardness difference, thereby monitoring scale formation. When scale formation leads to a decrease in thermal efficiency, corresponding scale treatment is performed, allowing users to promptly address scale buildup in their water heaters, eliminating safety hazards and ensuring safe operation. Timely scale removal also improves the heating efficiency and reduces energy consumption of the water heater.

[0249] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0250] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, embodiments of the present invention can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of the present invention can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0251] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0252] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0253] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0254] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0255] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0256] The present invention has provided a detailed description of a method for treating scale in a water heater, a device for treating scale in a water heater, a water heater, and a computer-readable storage medium. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for removing limescale from a water heater, characterized in that, The water heater has an inlet water conductivity sensor installed in its inlet pipe and an outlet water conductivity sensor installed in its outlet pipe. The method includes: The hardness of the influent water detected by the influent conductivity sensor and the hardness of the effluent water detected by the effluent conductivity sensor are obtained. The water hardness difference is determined based on the hardness of the influent water and the hardness of the effluent water. In response to the water hardness difference being greater than a preset scale threshold, the current thermal efficiency value is determined. The decrease in thermal efficiency is determined based on the current thermal efficiency value; Descaling treatment is performed based on the aforementioned decrease in thermal efficiency; The step of descaling based on the decrease in thermal efficiency includes: In response to the thermal efficiency decrease value being greater than a first decrease threshold and not greater than a second decrease threshold, a descaling reminder message is generated; the second decrease threshold is greater than the first decrease threshold. Increase the preset scale threshold, and then execute the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold, until the water hardness difference is cleared to zero.

2. The method according to claim 1, characterized in that, The step of determining the water hardness difference based on the influent water hardness and the effluent water hardness includes: Based on the hardness difference calculation formula, the hardness of the influent water and the hardness of the effluent water are calculated to determine the hardness difference. The formula for calculating the hardness difference is: Where N is the water hardness difference, with an initial value of 0; t = 0 is the start time of water use; t = i is the end time of water use; dH 进 The hardness of the influent water; dH 出 The hardness of the effluent.

3. The method according to claim 1, characterized in that, When the water heater is a gas water heater, the step of determining the current thermal efficiency value includes: When the gas water heater has been dispensing water for a preset time, the following parameters are measured: water volume, water temperature, inlet water temperature, low calorific value of gas, gas flow rate, gas temperature, and gas pressure. Based on the formula for calculating the thermal efficiency of a gas water heater, the current thermal efficiency value is determined according to the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow rate, gas temperature, and gas pressure. The formula for calculating the thermal efficiency of a gas water heater is as follows: Where, η t The current thermal efficiency value is given; C is the specific heat capacity of water; M is the outflow rate; t w2 The outlet water temperature; t w1 Inlet water temperature; Q1 is the minimum calorific value of the gas; V is the gas flow rate; t g P represents the gas temperature. a Pg is atmospheric pressure; S is the gas pressure; t is temperature. g Saturated vapor pressure at time.

4. The method according to claim 1, characterized in that, When the water heater is an electric water heater, the step of determining the current thermal efficiency value includes: Detect the initial water temperature; After the electric water heater has finished heating, check the water quality, target water temperature, and heating time. The temperature change value is determined based on the target water temperature and the initial water temperature; Based on the formula for calculating the thermal efficiency of an electric water heater, the current thermal efficiency value is determined according to the water mass, the water temperature change value, and the heating time. The formula for calculating the thermal efficiency of the electric water heater is as follows: the t =(m*c*(ΔT)) / (p*t)*100% Where, η t denoted as water mass; C as water specific heat capacity; ΔT as water temperature change; p as power of the electric water heater; and t as heating time.

5. The method according to claim 1, characterized in that, The step of determining the decrease in thermal efficiency based on the current thermal efficiency value includes: Determine the thermal efficiency threshold; The decrease in thermal efficiency is determined based on the quotient of the current thermal efficiency value and the thermal efficiency threshold.

6. The method according to claim 1, characterized in that, The step of descaling based on the decrease in thermal efficiency further includes: In response to the thermal efficiency decrease value exceeding a preset second decrease threshold, descaling guidance information is generated.

7. A water heater scale removal device, characterized in that, The water heater has an inlet water conductivity sensor installed in its inlet pipe and an outlet water conductivity sensor installed in its outlet pipe. The device includes: The acquisition module is used to acquire the influent water hardness detected by the influent conductivity sensor and the effluent water hardness detected by the effluent conductivity sensor. The first calculation module is used to determine the difference in water hardness based on the hardness of the influent water and the hardness of the effluent water. The second calculation module is used to calculate the current thermal efficiency value in response to the water hardness difference being greater than a preset scale threshold. The third calculation module is used to determine the decrease in thermal efficiency based on the current thermal efficiency value; The processing module is used to perform descaling based on the decrease in thermal efficiency. The processing module includes: The first processing submodule is used to generate a descaling reminder message in response to the thermal efficiency decrease value being greater than a first decrease threshold and not greater than a second decrease threshold; the second decrease threshold is greater than the first decrease threshold. The second processing submodule is used to increase the preset scale threshold, and then execute the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold, until the water hardness difference is cleared to zero.

8. A water heater, characterized in that, The device includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the water heater scale removal method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the steps of the water heater scale removal method as described in any one of claims 1-6.

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