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

Abstract

The embodiment of the invention provides a water heater scale treatment method and device, a water heater and a storage medium. The water heater scale treatment method comprises the steps that inlet water quality hardness detected by an inlet water conductivity sensor and outlet water quality hardness detected by an outlet water conductivity sensor are obtained; determining a water quality hardness difference value according to the water quality hardness of the inlet water and the water quality hardness of the outlet water; determining a current thermal efficiency value in response to the condition that the water hardness difference value is greater than a preset scale threshold value; determining a thermal efficiency decrease value according to the current thermal efficiency value; and descaling treatment is carried out according to the heat efficiency drop value. According to the embodiment of the invention, the water scale can be detected and timely treated, so that the potential safety hazard is eliminated, and the safe operation of the water heater is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of water heater control, and in particular to a water heater scale treatment method, a water heater scale treatment device, a water heater and a computer-readable storage medium. Background Art

[0002] Because hard water contains high levels of calcium and magnesium ions, long-term use of water heaters will heat water in heat exchangers, heating tubes and other components, forming scale on them. Scale accumulation has a serious negative impact on water heaters, but the current detection and treatment of scale mainly depends on the user's usage habits. Relevant treatment is based on the user's usage time, resulting in scale not being removed in time, posing a safety hazard to the use of water heaters. Summary of the invention

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

[0004] In order to solve the above problems, in a first aspect of the present invention, an embodiment of the present invention discloses a method for treating scale on a water heater, wherein an inlet water conductivity sensor is provided in a water inlet pipe of the water heater, and an outlet water conductivity sensor is provided in an outlet water pipe, and the method comprises:

[0005] Obtaining the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor;

[0006] Determine the water hardness difference according to the inlet water hardness and the outlet water hardness;

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

[0008] Determining a thermal efficiency decrease value according to the current thermal efficiency value;

[0009] Descaling is performed according to the thermal efficiency reduction value.

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

[0011] Based on the hardness difference calculation formula, the inlet water hardness and the outlet water hardness are calculated to determine the water hardness difference;

[0012] The hardness difference calculation formula is:

[0013]

[0014] Where N is the water hardness difference, the initial value is 0; t = 0 is the time when water is started; t = i is the time when water is finished; dH 进 Influent water hardness; dH 出 It is the hardness of outlet water.

[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 producing water for a preset time, the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow, gas temperature, and gas pressure are detected;

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

[0018] The thermal efficiency calculation formula of the gas water heater is:

[0019]

[0020] Among them, η t is the current thermal efficiency value; C is the specific heat capacity of water; M is the water output; t w2 is the outlet water temperature; t w1 is the water inlet temperature; Q1 is the low calorific value of the gas; V is the gas flow rate; t g is the gas temperature; P a is atmospheric pressure; Pg is gas pressure; S is temperature t g Saturated steam pressure.

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

[0022] Detect initial water temperature;

[0023] After the electric water heater has finished heating, the water quality, target water temperature and heating time are detected;

[0024] determining a temperature change value based on the target water temperature and the initial water temperature;

[0025] Based on the electric water heater thermal efficiency calculation formula, determine the current thermal efficiency value according to the water quality, the water temperature change value and the heating time;

[0026] The calculation formula for the thermal efficiency of the electric water heater is:

[0027] η t =(m*c*(ΔT)) / (p*t)*100%

[0028] Among them, η t is the water mass; C is the specific heat capacity of water; ΔT is the change in water temperature; p is the power of the electric water heater; t is the heating time.

[0029] Optionally, the step of determining the thermal efficiency decrease value according to the current thermal efficiency value comprises:

[0030] Determine thermal efficiency thresholds;

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

[0032] Optionally, the step of performing descaling according to the thermal efficiency reduction value includes:

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

[0034] The preset scale threshold is increased, and the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold is performed with the increased preset scale threshold until the water hardness difference is cleared.

[0035] Optionally, the step of performing descaling according to the thermal efficiency reduction value further includes:

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

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

[0038] An acquisition module, used to acquire the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor;

[0039] A first calculation module, used for determining a water hardness difference according to the inlet water hardness and the outlet water hardness;

[0040] A second calculation module, for calculating a current thermal efficiency value in response to the water hardness difference being greater than a preset scale threshold;

[0041] A third calculation module, used to determine a thermal efficiency drop value according to the current thermal efficiency value;

[0042] The processing module is used for performing descaling processing according to the thermal efficiency reduction value.

[0043] Optionally, the first calculation module includes:

[0044] A first calculation submodule is used to calculate the inlet water hardness and the outlet water hardness based on the hardness difference calculation formula to determine the water hardness difference;

[0045] The hardness difference calculation formula is:

[0046]

[0047] Where N is the water hardness difference, the initial value is 0; t = 0 is the time when water is started; t = i is the time when water is finished; dH 进 Influent water hardness; dH 出 It is the hardness of outlet water.

[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, gas low calorific value, gas flow, gas temperature, and gas pressure when the gas water heater outputs water for a preset time;

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

[0051] The thermal efficiency calculation formula of the gas water heater is:

[0052]

[0053] Among them, η t is the current thermal efficiency value; C is the specific heat capacity of water; M is the water output; t w2 is the outlet water temperature; t w1 is the water inlet temperature; Q1 is the low calorific value of the gas; V is the gas flow rate; t g is the gas temperature; P a is atmospheric pressure; Pg is gas pressure; S is temperature t g Saturated steam pressure.

[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] A third calculation submodule, configured to determine a temperature change value based on the target water temperature and the initial water temperature;

[0058] A fourth calculation submodule, for determining the current thermal efficiency value based on the thermal efficiency calculation formula of the electric water heater according to the water quality, the water temperature change value and the heating time;

[0059] The calculation formula for the thermal efficiency of the electric water heater is:

[0060] η t =(m*c*(ΔT)) / (p*t)*100%

[0061] Among them, η t is the water mass; C is the specific heat capacity of water; ΔT is the change in water temperature; p is the power of the electric water heater; t is the heating time.

[0062] Optionally, the third calculation module includes:

[0063] A determination submodule is used to determine a thermal efficiency threshold;

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

[0065] Optionally, the processing module includes:

[0066] A first processing submodule, configured to generate a descaling reminder message in response to the thermal efficiency decrease value being greater than a first decrease threshold value and not greater than a second decrease threshold value; the second decrease threshold value being greater than the first decrease threshold value;

[0067] The second processing submodule is used to increase the preset scale threshold, and 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 with the increased preset scale threshold until the water hardness difference is cleared.

[0068] Optionally, the processing module further includes:

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

[0070] In the 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 implements the steps of the water heater scale treatment method as described above when executed by the processor.

[0071] In a fourth aspect of the present invention, an embodiment of the present invention discloses a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the water heater scale treatment method as described above are implemented.

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

[0073] The embodiment of the present invention obtains the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor; determines the water hardness difference according to the inlet water hardness and the outlet water hardness; determines the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold; determines the thermal efficiency reduction value according to the current thermal efficiency value; and performs descaling according to the thermal efficiency reduction value. By real-time monitoring the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor, scale is detected based on the water hardness difference, and then the scale generation is monitored. When the scale generation causes the thermal efficiency to decrease, corresponding scale treatment is performed, so that the user can timely treat the scale of the water heater and eliminate safety hazards to ensure the safe operation of the water heater, and timely treatment of scale can improve the heating efficiency of the water heater and reduce the energy consumption of the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 It is a flow chart of steps of an embodiment of a method for treating scale in a water heater according to the present invention;

[0075] Figure 2 is a flowchart of another water heater scale treatment method embodiment of the present invention;

[0076] Figure 3 It is a schematic diagram of the water heater system structure;

[0077] Figure 4 It is a schematic diagram of scale attachment;

[0078] Figure 5 It is a schematic flow chart of an example of a method for treating scale on a water heater according to the present invention;

[0079] Figure 6 It is a structural block diagram of an embodiment of a water heater scale treatment device of the present invention;

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

[0081] Figure 8 It is a structural block diagram of a storage medium provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0082] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0083] Reference Figure 1 , shows a flow chart of steps of an embodiment of a water heater scale treatment method of the present invention, wherein an inlet water conductivity sensor is provided in the water inlet pipe of the water heater, and an outlet water conductivity sensor is provided in the water outlet pipe. The inlet water conductivity sensor and the outlet water conductivity sensor can use the same conductivity sensor. The specific types include but are not limited to electrode type conductivity sensors, inductive type conductivity sensors, ultrasonic conductivity sensors, etc.

[0084] Electrode conductivity sensors are based on the principle of electrolytic conductivity and use resistance measurement to measure conductivity. They can include two-electrode types: consisting of a pair of electrodes, a constant voltage is applied to the electrodes, and the conductivity is calculated by measuring the change in the current between the electrodes. Its measurement range is wide, but different electrode constants have different ranges. For example, when the electrode constant is 0.01 / cm, the measurement range is 0-20μS / cm; when the electrode constant is 1.0 / cm, the measurement range is 10-20000μS / cm. It can also include four-electrode types: consisting of 2 current electrodes and 2 voltage electrodes, and the voltage electrode and the current electrode are coaxial. The conductivity is calculated by measuring the current between the current electrodes and the voltage at both ends of the voltage electrode, and using the linear relationship between them. The inductive conductivity sensor is based on the principle of electromagnetic induction, and calculates the conductivity by measuring the proportional relationship between the induced voltage and the excitation voltage. The ultrasonic conductivity sensor measures according to the relationship between the propagation characteristics of ultrasonic waves in the liquid (such as speed, attenuation, etc.) and the conductivity.

[0085] The water heater scale treatment method may specifically include the following steps:

[0086] Step 101, obtaining the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor;

[0087] The inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor can be obtained respectively. The inlet water hardness is the hardness of the water detected in the inlet pipe; the outlet water hardness is the hardness of the water detected in the outlet pipe.

[0088] Step 102, determining a water hardness difference according to the inlet water hardness and the outlet water hardness;

[0089] Based on the difference between the inlet water hardness and the outlet water hardness, the hardness change of the water between the inlet pipe and the outlet pipe of the water heater is determined to obtain the water hardness difference. The water hardness difference can be used to determine the scale remaining in the water heater and attached to the water heater pipe.

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

[0091] Determine whether the water hardness difference is greater than the preset scale threshold. When the water hardness difference is not greater than the preset scale threshold, it means that there is less residue, and the impact of scale on the water heater is less, so no treatment is required. When the water hardness difference is greater than the preset scale threshold, it means that there is less residue, and scale will have an impact on the water heater. In response to the water hardness difference being greater than the preset scale threshold, the current thermal efficiency value of the water heater can be determined. Among them, the current thermal efficiency value is the thermal efficiency of the water heater when heating at the current moment. The preset scale threshold can be determined according to the specific structure of the water heater. It can be obtained by conducting experiments on the water heater in advance, and there is no specific limitation on the specific value.

[0092] Step 104, determining a thermal efficiency decrease value according to the current thermal efficiency value;

[0093] The decrease state of the water heater relative to the specified rated thermal efficiency is determined according to the current thermal efficiency value, and a thermal efficiency decrease value is generated. That is, the thermal efficiency decrease value represents the decrease state of the thermal efficiency of the current water heater.

[0094] Step 105: performing descaling according to the thermal efficiency reduction value.

[0095] Different thermal efficiency attenuation conditions are determined based on the thermal efficiency drop value, and different descaling treatments are then adopted, so that the scale can be treated in time.

[0096] The embodiment of the present invention obtains the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor; determines the water hardness difference according to the inlet water hardness and the outlet water hardness; determines the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold; determines the thermal efficiency reduction value according to the current thermal efficiency value; and performs descaling according to the thermal efficiency reduction value. By real-time monitoring the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor, scale is detected based on the water hardness difference, and then the scale generation is monitored. When the scale generation causes the thermal efficiency to decrease, corresponding scale treatment is performed, so that the user can timely treat the scale of the water heater and eliminate safety hazards to ensure the safe operation of the water heater, and timely treatment of scale can improve the heating efficiency of the water heater and reduce the energy consumption of the water heater.

[0097] Reference Figure 2 , shows a flow chart of steps of another water heater scale treatment method embodiment of the present invention, wherein an inlet water conductivity sensor is provided in the water inlet pipe of the water heater, and an outlet water conductivity sensor is provided in the outlet pipe. Figure 3 The inlet water conductivity sensor is set in the inlet pipe, and the outlet water conductivity sensor is set in the outlet pipe. One end of the heat exchanger is connected to the inlet pipe, and the other end is connected to the outlet pipe. The scale is attached to the heat exchanger. Figure 4 As shown, scale adheres to the internal pipes of the heat exchanger.

[0098] The water heater scale treatment method may specifically include the following steps:

[0099] Step 201, obtaining the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor;

[0100] First, the water hardness of the inlet water detected by the inlet water conductivity sensor and the water hardness of the outlet water detected by the outlet water conductivity sensor can be obtained. Specifically, the water hardness can be converted to the corresponding water hardness based on the sensor size according to the sensor type of the inlet water conductivity sensor and the outlet water conductivity sensor. And the inlet water conductivity sensor and the outlet water conductivity sensor detect the water hardness in real time when the user uses water.

[0101] Step 202, determining a water hardness difference according to the inlet water hardness and the outlet water hardness;

[0102] During the user's water use, the water hardness difference can be calculated and accumulated based on the real-time detected inlet water hardness and outlet water hardness. The formation and removal of scale is determined by the water hardness difference. The initial value of the water hardness difference is 0, that is, there is no scale.

[0103] Specifically, the step of determining the water hardness difference based on the inlet water hardness and the outlet water hardness includes: calculating the inlet water hardness and the outlet water hardness based on a hardness difference calculation formula to determine the water hardness difference;

[0104] The hardness difference calculation formula is:

[0105]

[0106] Where N is the water hardness difference, the initial value is 0; t = 0 is the time when water is started; t = i is the time when water is finished; dH 进 Influent water hardness; dH 出 It is the hardness of outlet water.

[0107] In practical applications, the hardness difference of the water quality can be determined cumulatively based on the above-mentioned hardness difference calculation formula and the inlet water hardness and outlet water hardness during the user's water use.

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

[0109] Determine whether the water hardness difference is greater than the preset scale threshold, and then determine whether the water hardness difference is greater than the preset scale threshold, calculate and determine the current thermal efficiency value, so as to judge the decline in thermal efficiency.

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

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

[0112] The thermal efficiency calculation formula of the gas water heater is:

[0113]

[0114] Among them, η t is the current thermal efficiency value; C is the specific heat capacity of water; M is the water output; t w2 is the outlet water temperature; t w1 is the water inlet temperature; Q1 is the low calorific value of the gas; V is the gas flow rate; t g is the gas temperature; P a is atmospheric pressure; Pg is gas pressure; S is temperature t g Saturated steam pressure.

[0115] When calculating the thermal efficiency of a gas water heater, you can wait for the gas water heater to output water for a preset time, so that the temperature and flow of the gas water heater outlet water are stable, and then detect the water output, water output temperature, water inlet temperature, gas low calorific value, gas flow, gas temperature, and gas pressure. Among them, the preset time is determined according to the specific design of the gas water heater, and the embodiment of the present invention does not specifically limit this. Then, the water output, water output temperature, water inlet temperature, gas low calorific value, gas flow, gas temperature, and gas pressure are combined and substituted into the thermal efficiency calculation formula of the gas water heater to calculate the corresponding current thermal efficiency value. Among them, the gas low calorific value, gas flow, gas temperature, gas pressure, etc. can be determined in advance by testing the gas water heater through a gas flow meter. The specific heat capacity of water is 4.19*10 -3 The unit of water output is kilogram per minute (kg / min); the unit of gas temperature, water outlet temperature and water inlet temperature is Celsius (℃); the unit of gas lower calorific value is megajoule per cubic meter (MJ / m 3 ); The unit of gas flow is cubic meter per minute (m 3 / min); the unit of gas pressure and steam pressure is kilopascal (kPa).

[0116] In an 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 is heated, 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; 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 calculation formula for the thermal efficiency of the electric water heater is:

[0118] η t =(m*c*(ΔT)) / (p*t)*100%

[0119] Among them, η t is the water mass; C is the specific heat capacity of water; ΔT is the change in water temperature; p is the power of the electric water heater; t is the heating time.

[0120] When the water heater is an electric water heater, the initial water temperature of the electric water heater before heating can be detected first. After the electric water heater is heated, the quality of the water after heating, the target water temperature currently reached by heating, and the heating time consumed from the initial water temperature to the target water temperature are detected. The difference between the target water temperature and the initial water temperature is calculated, and the difference is determined as the temperature change value. Then, based on the electric water heater thermal efficiency calculation formula, the water quality, water temperature change value and heating time are substituted to calculate the current thermal efficiency value of the electric water heater in the current scale state.

[0121] Step 204, determining a thermal efficiency decrease value according to the current thermal efficiency value;

[0122] The decrease in thermal efficiency can be determined based on the current thermal efficiency value, and the thermal efficiency decrease value can be determined.

[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 a 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 according to the rated thermal efficiency test standard before the water heater leaves the factory.

[0125] The quotient of the current thermal efficiency value and the thermal efficiency threshold is calculated to determine the thermal efficiency reduction value. Further, it can also be expressed in percentage. For example, the quotient of the current thermal efficiency value and the thermal efficiency threshold is calculated, and the percentage of 1 minus the quotient is determined as the thermal efficiency reduction value.

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

[0127] Different treatments are performed based on different thermal efficiency drop values. When the thermal efficiency drop value is greater than the first drop threshold value and not greater than the second drop threshold value, it means that the current scale affects the heating efficiency of the water heater, but the harm is small. A descaling reminder message can be generated to remind the user that the scale needs to be removed. The specific content of the descaling reminder message includes but is not limited to information such as a descaling mark to remind the user to remove the scale. The embodiment of the present invention does not specifically limit this. The second drop threshold value is greater than the first drop threshold value. The first drop threshold value and the second drop threshold value can be determined in advance according to the classification of the thermal efficiency drop state of the water heater. In addition, in the first drop threshold value and the second drop threshold value, in order to more finely classify and judge the thermal efficiency drop caused by scale, a third drop threshold value can be set between the first drop threshold value and the second drop threshold value, and multiple different thresholds are used to divide the degree of scale attachment, so as to further finely classify the degree of scale attachment and implement more fine processing. For example, the first drop threshold value and the second drop threshold value can be 5% and 20% respectively; the third threshold value can be 10%.

[0128] Furthermore, when the thermal efficiency decrease value is less than the first decrease threshold, it indicates that the current scale adhesion state has little effect on the thermal efficiency, and descaling may not be performed.

[0129] Step 206, increasing the preset scale threshold, and executing the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold with the increased preset scale threshold until the water hardness difference is cleared;

[0130] While generating the descaling reminder information, the preset scale threshold can also be increased, and the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold is executed with the increased preset scale threshold until the water hardness difference is reset to zero, thereby being able to reasonably remind the user to descale the next time the user uses water, and avoiding repeated generation of descaling reminder information.

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

[0132] When the thermal efficiency drop value is greater than the preset second drop threshold, it indicates that the performance of the water heater has been greatly weakened due to scaling, and descaling needs to be performed as soon as possible. Descaling guidance information is generated, and the user is warned and notified to perform descaling immediately through the descaling guidance information, as well as related descaling information, such as water heater fault identification, after-sales service hotline, etc.

[0133] For example, a 5%-10% drop in thermal efficiency indicates that scale has accumulated slightly to moderately on the surface of the heat exchanger. At this point, scale may form a thin layer on the wall of the heat exchanger. This situation has little impact on user use and users are advised not to take any action.

[0134] A 10%-20% drop in thermal efficiency means that scale may have accumulated into a medium to thick layer. The scale has seriously affected the heat transfer between hot water and the heat source. The water heater requires more energy to achieve the same heating effect, energy waste increases, and operating costs increase significantly. In this case, users may be advised to perform descaling.

[0135] A drop in thermal efficiency of more than 20% indicates that the performance of the water heater has been greatly reduced due to scale, which may affect the normal hot water supply. At this time, the energy consumption of the water heater will increase significantly, and user satisfaction may be affected due to low heating efficiency. This is a sign that scale accumulation has a serious negative impact on the water heater, and cleaning measures must be taken immediately, otherwise it will affect the normal operation and life of the water heater, and may even cause damage to the equipment.

[0136] In order to make the implementation process of the present invention clear to those skilled in the art, an example is used as follows to illustrate:

[0137] You can refer to Figure 5, showing a flow chart of an example of a water heater scale treatment method of the present invention. When the user uses water, the difference N between the inlet water hardness and the outlet water hardness is detected and accumulated in real time. When the amount of scale attached in the pipeline is greater than B, the user is prompted to contact after-sales service for descaling treatment.

[0138] Before leaving the factory, the gas water heater will record the thermal efficiency value η according to the rated thermal efficiency test standard 阈值 When the amount of scale attached to the pipe is greater than B, the user can enter the thermal efficiency calculation interface and enter 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 , and then calculate the percentage of thermal efficiency decrease (1-η 测试 / η 阈值 )*100%, test the basic situation of scale inside the user's gas water heater, then display the percentage of thermal efficiency reduction and the display interface and give user guidance.

[0139] Specifically, when the user enters the thermal efficiency calculation interface and obtains that the thermal efficiency decreases by 5%-10%, if no descaling is performed, the B value (preset scale threshold) will be increased by 0.5 times to provide a judgment value for the next descaling reminder and the N value (water hardness difference) will remain unchanged; if descaling is performed, the N value will be cleared and the B value will remain unchanged. When the user enters the thermal efficiency calculation interface and obtains that the thermal efficiency decreases by 10%-20%, if no descaling is performed, the B value will be increased by 0.25 times to provide a judgment value for the next descaling reminder and the N value will remain unchanged; if descaling is performed, the N value will be cleared and the B value will remain unchanged. When the user enters the thermal efficiency calculation interface and obtains that the thermal efficiency decreases by more than 20%, if no descaling is performed, a descaling reminder will be received each time the gas water heater is used; if descaling is performed, the N value will be cleared and the B value will remain unchanged.

[0140] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0141] Reference Figure 6 , shows a structural block diagram of an embodiment of a water heater scale treatment device of the present invention, wherein an inlet water conductivity sensor is provided in the water inlet pipe of the water heater, and an outlet water conductivity sensor is provided in the water outlet pipe. The water heater scale treatment device may specifically include the following modules:

[0142] An acquisition module 601 is used to acquire the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor;

[0143] A first calculation module 602, for determining a water hardness difference according to the inlet water hardness and the outlet water hardness;

[0144] A second calculation module 603, for calculating a current thermal efficiency value in response to the water hardness difference being greater than a preset scale threshold;

[0145] A third calculation module 604 is used to determine a thermal efficiency drop value according to the current thermal efficiency value;

[0146] The processing module 605 is used to perform descaling according to the thermal efficiency reduction value.

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

[0148] A first calculation submodule is used to calculate the inlet water hardness and the outlet water hardness based on the hardness difference calculation formula to determine the water hardness difference;

[0149] The hardness difference calculation formula is:

[0150]

[0151] Where N is the water hardness difference, the initial value is 0; t = 0 is the time when water is started; t = i is the time when water is finished; dH 进 Influent water hardness; dH 出 It is the hardness of outlet water.

[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, gas low calorific value, gas flow, gas temperature, and gas pressure when the gas water heater outputs water for a preset time;

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

[0155] The thermal efficiency calculation formula of the gas water heater is:

[0156]

[0157] Among them, ηt is the current thermal efficiency value; C is the specific heat capacity of water; M is the water output; t w2 is the outlet water temperature; t w1 is the water inlet temperature; Q1 is the low calorific value of the gas; V is the gas flow rate; t g is the gas temperature; P a is atmospheric pressure; Pg is gas pressure; S is temperature t g Saturated steam pressure.

[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] A third calculation submodule, configured to determine a temperature change value based on the target water temperature and the initial water temperature;

[0162] A fourth calculation submodule, for determining the current thermal efficiency value based on the thermal efficiency calculation formula of the electric water heater according to the water quality, the water temperature change value and the heating time;

[0163] The calculation formula for the thermal efficiency of the electric water heater is:

[0164] η t =(m*c*(ΔT)) / (p*t)*100%

[0165] Among them, η t is the water mass; C is the specific heat capacity of water; ΔT is the change in water temperature; p is the power of the electric water heater; t is the heating time.

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

[0167] A determination submodule is used to determine a thermal efficiency threshold;

[0168] The fifth calculation submodule is used to determine the thermal efficiency drop value 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] A first processing submodule, configured to generate a descaling reminder message in response to the thermal efficiency decrease value being greater than a first decrease threshold value and not greater than a second decrease threshold value; the second decrease threshold value being greater than the first decrease threshold value;

[0171] The second processing submodule is used to increase the preset scale threshold, and 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 with the increased preset scale threshold until the water hardness difference is cleared.

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

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

[0174] The embodiment of the present invention obtains the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor; determines the water hardness difference according to the inlet water hardness and the outlet water hardness; determines the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold; determines the thermal efficiency reduction value according to the current thermal efficiency value; and performs descaling according to the thermal efficiency reduction value. By real-time monitoring the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor, scale is detected based on the water hardness difference, and then the scale generation is monitored. When the scale generation causes the thermal efficiency to decrease, corresponding scale treatment is performed, so that the user can timely treat the scale of the water heater and eliminate safety hazards to ensure the safe operation of the water heater, and timely treatment of scale can improve the heating efficiency of the water heater and reduce the energy consumption of the water heater.

[0175] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0176] Reference Figure 7 The embodiment of the present invention further provides a water heater, comprising:

[0177] A processor 701 and a storage medium 702, wherein the storage medium 702 stores 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 treatment method as described in any one of the embodiments of the present invention.

[0178] Wherein, an inlet water conductivity sensor is provided in the water inlet pipe of the water heater, and an outlet water conductivity sensor is provided in the water outlet pipe. The water heater scale treatment method comprises:

[0179] Obtaining the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor;

[0180] Determine the water hardness difference according to the inlet water hardness and the outlet water hardness;

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

[0182] Determining a thermal efficiency decrease value according to the current thermal efficiency value;

[0183] Descaling is performed according to the thermal efficiency reduction value.

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

[0185] Based on the hardness difference calculation formula, the inlet water hardness and the outlet water hardness are calculated to determine the water hardness difference;

[0186] The hardness difference calculation formula is:

[0187]

[0188] Where N is the water hardness difference, the initial value is 0; t = 0 is the time when water is started; t = i is the time when water is finished; dH 进 Influent water hardness; dH 出 It is the hardness of outlet water.

[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 producing water for a preset time, the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow, gas temperature, and gas pressure are detected;

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

[0192] The thermal efficiency calculation formula of the gas water heater is:

[0193]

[0194] Among them, η t is the current thermal efficiency value; C is the specific heat capacity of water; M is the water output; t w2 is the outlet water temperature; t w1 is the water inlet temperature; Q1 is the low calorific value of the gas; V is the gas flow rate; t g is the gas temperature; P a is atmospheric pressure; Pg is gas pressure; S is temperature tg Saturated steam pressure.

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

[0196] Detect initial water temperature;

[0197] After the electric water heater has finished heating, the water quality, target water temperature and heating time are detected;

[0198] determining a temperature change value based on the target water temperature and the initial water temperature;

[0199] Based on the electric water heater thermal efficiency calculation formula, determine the current thermal efficiency value according to the water quality, the water temperature change value and the heating time;

[0200] The calculation formula for the thermal efficiency of the electric water heater is:

[0201] η t =(m*c*(ΔT)) / (p*t)*100%

[0202] Among them, η t is the water mass; C is the specific heat capacity of water; ΔT is the change in water temperature; p is the power of the electric water heater; t is the heating time.

[0203] Optionally, the step of determining the thermal efficiency decrease value according to the current thermal efficiency value comprises:

[0204] Determine thermal efficiency thresholds;

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

[0206] Optionally, the step of performing descaling according to the thermal efficiency reduction value includes:

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

[0208] The preset scale threshold is increased, and the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold is performed with the increased preset scale threshold until the water hardness difference is cleared.

[0209] Optionally, the step of performing descaling according to the thermal efficiency reduction value further includes:

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

[0211] The embodiment of the present invention obtains the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor; determines the water hardness difference according to the inlet water hardness and the outlet water hardness; determines the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold; determines the thermal efficiency reduction value according to the current thermal efficiency value; and performs descaling according to the thermal efficiency reduction value. By real-time monitoring the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor, scale is detected based on the water hardness difference, and then the scale generation is monitored. When the scale generation causes the thermal efficiency to decrease, corresponding scale treatment is performed, so that the user can timely treat the scale of the water heater and eliminate safety hazards to ensure the safe operation of the water heater, and timely treatment of scale can improve the heating efficiency of the water heater and reduce the energy consumption of the water heater.

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

[0213] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

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

[0215] Wherein, an inlet water conductivity sensor is provided in the water inlet pipe of the water heater, and an outlet water conductivity sensor is provided in the water outlet pipe. The water heater scale treatment method comprises:

[0216] Obtaining the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor;

[0217] Determine the water hardness difference according to the inlet water hardness and the outlet water hardness;

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

[0219] Determining a thermal efficiency decrease value according to the current thermal efficiency value;

[0220] Descaling is performed according to the thermal efficiency reduction value.

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

[0222] Based on the hardness difference calculation formula, the inlet water hardness and the outlet water hardness are calculated to determine the water hardness difference;

[0223] The hardness difference calculation formula is:

[0224]

[0225] Where N is the water hardness difference, the initial value is 0; t = 0 is the time when water is started; t = i is the time when water is finished; dH 进 Influent water hardness; dH 出 It is the hardness of outlet water.

[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 producing water for a preset time, the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow, gas temperature, and gas pressure are detected;

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

[0229] The thermal efficiency calculation formula of the gas water heater is:

[0230]

[0231] Among them, η t is the current thermal efficiency value; C is the specific heat capacity of water; M is the water output; t w2 is the outlet water temperature; t w1is the water inlet temperature; Q1 is the low calorific value of the gas; V is the gas flow rate; t g is the gas temperature; P a is atmospheric pressure; Pg is gas pressure; S is temperature t g Saturated steam pressure.

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

[0233] Detect initial water temperature;

[0234] After the electric water heater has finished heating, the water quality, target water temperature and heating time are detected;

[0235] determining a temperature change value based on the target water temperature and the initial water temperature;

[0236] Based on the electric water heater thermal efficiency calculation formula, determine the current thermal efficiency value according to the water quality, the water temperature change value and the heating time;

[0237] The calculation formula for the thermal efficiency of the electric water heater is:

[0238] η t =(m*c*(ΔT)) / (p*t)*100%

[0239] Among them, η t is the water mass; C is the specific heat capacity of water; ΔT is the change in water temperature; p is the power of the electric water heater; t is the heating time.

[0240] Optionally, the step of determining the thermal efficiency decrease value according to the current thermal efficiency value comprises:

[0241] Determine thermal efficiency thresholds;

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

[0243] Optionally, the step of performing descaling according to the thermal efficiency reduction value includes:

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

[0245] The preset scale threshold is increased, and the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold is performed with the increased preset scale threshold until the water hardness difference is cleared.

[0246] Optionally, the step of performing descaling according to the thermal efficiency reduction value further includes:

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

[0248] The embodiment of the present invention obtains the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor; determines the water hardness difference according to the inlet water hardness and the outlet water hardness; determines the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold; determines the thermal efficiency reduction value according to the current thermal efficiency value; and performs descaling according to the thermal efficiency reduction value. By real-time monitoring the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor, scale is detected based on the water hardness difference, and then the scale generation is monitored. When the scale generation causes the thermal efficiency to decrease, corresponding scale treatment is performed, so that the user can timely treat the scale of the water heater and eliminate safety hazards to ensure the safe operation of the water heater, and timely treatment of scale can improve the heating efficiency of the water heater and reduce the energy consumption of the water heater.

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

[0250] It will be appreciated by those skilled in the art that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may take the form of a computer program product 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 codes.

[0251] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0252] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A 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 device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0254] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0255] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0256] The above is a detailed introduction to a water heater scale treatment method provided by the present invention, which involves a water heater scale treatment device, a water heater and a computer-readable storage medium. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for treating water heater scale, characterized in that: An inlet water conductivity sensor is provided in a water inlet pipe of the water heater, and an outlet water conductivity sensor is provided in an outlet water pipe. The method comprises: Obtaining the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor; Determine the water hardness difference according to the inlet water hardness and the outlet water hardness; In response to the water hardness difference being greater than a preset scale threshold, determining a current thermal efficiency value; Determining a thermal efficiency decrease value according to the current thermal efficiency value; Descaling is performed according to the thermal efficiency reduction value.

2. The method according to claim 1, characterized in that The step of determining the water hardness difference based on the inlet water hardness and the outlet water hardness comprises: Based on the hardness difference calculation formula, the inlet water hardness and the outlet water hardness are calculated to determine the water hardness difference; The hardness difference calculation formula is: Where N is the water hardness difference, the initial value is 0; t = 0 is the time when water is started; t = i is the time when water is finished; dH 进 Influent water hardness; dH 出 It is the hardness of outlet water.

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 producing water for a preset time, the water output, water output temperature, water inlet temperature, low calorific value of the gas, gas flow, gas temperature, and gas pressure are detected; Based on the thermal efficiency calculation formula of the gas water heater, the current thermal efficiency value is determined according to the water output, the water output temperature, the water inlet temperature, the low calorific value of the gas, the gas flow, the gas temperature, and the gas pressure; The thermal efficiency calculation formula of the gas water heater is: Among them, η t is the current thermal efficiency value; C is the specific heat capacity of water; M is the water output; t w2 is the outlet water temperature; t w1 is the water inlet temperature; Q1 is the low calorific value of the gas; V is the gas flow rate; t g is the gas temperature; P a is atmospheric pressure; Pg is gas pressure; S is temperature t g Saturated steam pressure.

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 initial water temperature; After the electric water heater has finished heating, the water quality, target water temperature and heating time are detected; determining a temperature change value based on the target water temperature and the initial water temperature; Based on the electric water heater thermal efficiency calculation formula, determine the current thermal efficiency value according to the water quality, the water temperature change value and the heating time; The calculation formula for the thermal efficiency of the electric water heater is: the t =(m*c*(ΔT)) / (p*t)*100% Among them, η t is the water mass; C is the specific heat capacity of water; ΔT is the change in water temperature; p is the power of the electric water heater; t is the heating time.

5. The method according to claim 1, characterized in that The step of determining the thermal efficiency decrease value according to the current thermal efficiency value comprises: Determine thermal efficiency thresholds; The thermal efficiency reduction value is determined based on a 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 performing descaling according to the thermal efficiency reduction value comprises: In response to the thermal efficiency decrease value being greater than a first decrease threshold value and not greater than a second decrease threshold value, generating a descaling reminder message; the second decrease threshold value being greater than the first decrease threshold value; The preset scale threshold is increased, and the step of determining the current thermal efficiency value in response to the water hardness difference being greater than the preset scale threshold is performed with the increased preset scale threshold until the water hardness difference is cleared.

7. The method according to claim 6, characterized in that The step of performing descaling according to the thermal efficiency reduction value also includes: In response to the thermal efficiency decrease value being greater than a preset second decrease threshold, descaling guidance information is generated.

8. A water heater scale treatment device, characterized in that: The water inlet pipe of the water heater is provided with an inlet water conductivity sensor, and the water outlet pipe is provided with an outlet water conductivity sensor. The device comprises: An acquisition module, used to acquire the inlet water hardness detected by the inlet water conductivity sensor and the outlet water hardness detected by the outlet water conductivity sensor; A first calculation module, used for determining a water hardness difference according to the inlet water hardness and the outlet water hardness; A second calculation module, for calculating a current thermal efficiency value in response to the water hardness difference being greater than a preset scale threshold; A third calculation module, used to determine a thermal efficiency drop value according to the current thermal efficiency value; The processing module is used for performing descaling processing according to the thermal efficiency reduction value.

9. A water heater, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the water heater scale treatment method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the water heater scale treatment method according to any one of claims 1 to 7 are implemented.

Images