Heating control method and equipment of variable frequency water heater, storage medium and program product

Abstract

The invention belongs to the field of intelligent household appliances, and particularly relates to a heating control method and device of a variable-frequency water heater, a storage medium and a program product. The water inlet temperature and the water outlet temperature of the variable-frequency water heater are detected in real time, and the variable-frequency water heater is controlled based on the water inlet temperature, the water outlet temperature and the current heating mode and the set temperature of the variable-frequency water heater; the real-time heating mode of the variable-frequency water heater is determined, the variable-frequency water heater is controlled to conduct heating according to the real-time heating mode, and compressor frequencies corresponding to different heating modes of the variable-frequency water heater are different; according to the method, the heating efficiency of the water heater is improved, and the overall energy consumption of the water heater in the operation process is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of smart home appliances, and in particular to a heating control method, device, storage medium and program product for a variable frequency water heater. Background Art

[0002] With the continuous development of the Internet of Things and artificial intelligence technology, smart home products are becoming more and more popular. As a part of smart home, variable frequency water heaters can achieve more accurate and efficient hot water supply by integrating intelligent heating logic and sensor technology.

[0003] In the prior art, the variable frequency water heater monitors the water temperature in real time through a temperature sensor and transmits the temperature signal to the controller. The water heater control system compares the set temperature set by the user through the control panel with the current water outlet temperature, and controls the rise and fall of the water outlet temperature by adjusting the power of the heating element. When the water outlet temperature reaches the set temperature, the water heater control system will cut off the power supply of the heating element and stop heating; when the water outlet temperature is lower than the preset value, the heating element will be restarted for heating.

[0004] However, in actual applications, the energy efficiency conversion of the heating element cannot always reach the optimal state, and the water heater control system may have a response lag or over-adjustment when adjusting the power, resulting in energy waste. Therefore, the existing variable frequency water heater heating control process has the problems of low heating efficiency and high energy consumption. Summary of the invention

[0005] The embodiments of the present application provide a heating control method, device, storage medium and program product for a variable frequency water heater, so as to solve the problems of low heating efficiency and high energy consumption in the heating control process of the existing variable frequency water heater.

[0006] In a first aspect, an embodiment of the present application provides a heating control method for a variable frequency water heater, comprising:

[0007] Real-time detection of water inlet temperature and water outlet temperature of the variable frequency water heater;

[0008] Based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater, the real-time heating mode of the variable frequency water heater is determined, and the variable frequency water heater is controlled to heat according to the real-time heating mode, wherein different heating modes of the variable frequency water heater correspond to different compressor frequencies.

[0009] Optionally, determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, and the current heating mode and set temperature of the variable frequency water heater includes:

[0010] If the current heating mode of the variable frequency water heater is the standby mode, then the real-time heating mode of the variable frequency water heater is determined to be the first heating mode when any of the following conditions is met:

[0011] The outlet water temperature is less than the set temperature minus a first threshold value, and when the set temperatures are different, the first threshold values ​​are the same or different;

[0012] The outlet water temperature is less than the set temperature minus a second threshold, and the inlet water temperature is less than the set temperature minus a third threshold, wherein the second threshold is less than the first threshold, and the third threshold is greater than the first threshold;

[0013] The drop value of the inlet water temperature within the preset time period is greater than or equal to the fourth threshold and less than the fifth threshold.

[0014] Optionally, determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, and the current heating mode and set temperature of the variable frequency water heater includes:

[0015] If the current heating mode of the variable frequency water heater is the first heating mode, then the real-time heating mode of the variable frequency water heater is determined to be the second heating mode when the following conditions are met, wherein the compressor frequency corresponding to the second heating mode is higher than the compressor frequency corresponding to the first heating mode:

[0016] The water inlet temperature is less than a sixth threshold, the water outlet temperature is less than the set temperature minus a seventh threshold, and the set temperature is greater than or equal to an eighth threshold, wherein the seventh threshold is greater than or equal to the first threshold, and the eighth threshold is greater than the sixth threshold.

[0017] Optionally, determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, and the current heating mode and set temperature of the variable frequency water heater includes:

[0018] If the current heating mode of the variable frequency water heater is any one of the standby mode, the first heating mode, and the second heating mode, then when any of the following conditions is met, it is determined that the real-time heating mode of the variable frequency water heater is the third heating mode, wherein the compressor frequency corresponding to the third heating mode is higher than the compressor frequency corresponding to the second heating mode:

[0019] The set temperature is greater than or equal to a ninth threshold, and the outlet water temperature is less than or equal to a tenth threshold, the ninth threshold is greater than the tenth threshold, and the tenth threshold is greater than the eighth threshold;

[0020] The set temperature is less than the ninth threshold, and the outlet water temperature is less than or equal to the set temperature minus the seventh threshold.

[0021] Optionally, determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, and the current heating mode and set temperature of the variable frequency water heater includes:

[0022] If the current heating mode of the variable frequency water heater is any one of the first heating mode, the second heating mode, and the third heating mode, then when the water outlet temperature is greater than or equal to the set temperature, the real-time heating mode of the variable frequency water heater is determined to be the standby mode.

[0023] Optionally, determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, and the current heating mode and set temperature of the variable frequency water heater includes:

[0024] If the current heating mode of the variable frequency water heater is the second heating mode, then when the outlet water temperature is greater than or equal to the set temperature minus the seventh threshold, the real-time heating mode of the variable frequency water heater is determined to be the first heating mode.

[0025] Optionally, determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, and the current heating mode and set temperature of the variable frequency water heater includes:

[0026] If the current heating mode of the variable frequency water heater is the third heating mode, then the real-time heating mode of the variable frequency water heater is determined to be the first heating mode when the following conditions are met:

[0027] The outlet water temperature is greater than the set temperature minus an eleventh threshold, and the inlet water temperature drops to be less than or equal to the fifth threshold within the preset time, and the eleventh threshold is less than the seventh threshold and greater than the second threshold;

[0028] If the current heating mode of the variable frequency water heater is the third heating mode, then the real-time heating mode of the variable frequency water heater is determined to be the second heating mode when the following conditions are met:

[0029] The outlet water temperature is greater than the set temperature minus the eleventh threshold, and the inlet water temperature drops to be greater than the fifth threshold within the preset time.

[0030] Optionally, also include:

[0031] If multiple real-time heating modes are determined based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater, the real-time heating mode with the lowest compressor frequency among the multiple real-time heating modes is determined as the target heating mode, and the variable frequency water heater is controlled to heat according to the target heating mode.

[0032] In a second aspect, an embodiment of the present application provides a heating control device for a variable frequency water heater, comprising:

[0033] A detection module, used for detecting the water inlet temperature and water outlet temperature of the variable frequency water heater in real time;

[0034] a determination module, configured to determine a real-time heating mode of the variable frequency water heater based on the inlet water temperature, the outlet water temperature, the current heating mode and the set temperature of the variable frequency water heater, wherein different heating modes of the variable frequency water heater correspond to different compressor frequencies;

[0035] The control module is used to control the variable frequency water heater to heat according to the real-time heating mode.

[0036] Optionally, the determination module is further configured to determine that the real-time heating mode of the variable frequency water heater is the first heating mode if the current heating mode of the variable frequency water heater is the standby mode and any of the following conditions is met:

[0037] The outlet water temperature is less than the set temperature minus a first threshold value, and when the set temperatures are different, the first threshold values ​​are the same or different;

[0038] The outlet water temperature is less than the set temperature minus a second threshold, and the inlet water temperature is less than the set temperature minus a third threshold, wherein the second threshold is less than the first threshold, and the third threshold is greater than the first threshold;

[0039] The drop value of the inlet water temperature within the preset time period is greater than or equal to the fourth threshold and less than the fifth threshold.

[0040] Optionally, the determination module is further configured to, if the current heating mode of the variable frequency water heater is the first heating mode, determine that the real-time heating mode of the variable frequency water heater is the second heating mode when the following conditions are met, wherein the compressor frequency corresponding to the second heating mode is higher than the compressor frequency corresponding to the first heating mode:

[0041] The water inlet temperature is less than a sixth threshold, the water outlet temperature is less than the set temperature minus a seventh threshold, and the set temperature is greater than or equal to an eighth threshold, wherein the seventh threshold is greater than or equal to the first threshold, and the eighth threshold is greater than the sixth threshold.

[0042] Optionally, the determination module is further configured to determine that the real-time heating mode of the variable frequency water heater is a third heating mode if the current heating mode of the variable frequency water heater is any one of the standby mode, the first heating mode, and the second heating mode, and if any of the following conditions is met, wherein the compressor frequency corresponding to the third heating mode is higher than the compressor frequency corresponding to the second heating mode:

[0043] The set temperature is greater than or equal to a ninth threshold, and the outlet water temperature is less than or equal to a tenth threshold, the ninth threshold is greater than the tenth threshold, and the tenth threshold is greater than the eighth threshold;

[0044] The set temperature is less than the ninth threshold, and the outlet water temperature is less than or equal to the set temperature minus the seventh threshold.

[0045] Optionally, the determination module is also used to determine that the real-time heating mode of the variable frequency water heater is the standby mode if the current heating mode of the variable frequency water heater is any one of the first heating mode, the second heating mode, and the third heating mode, and when the water outlet temperature is greater than or equal to the set temperature.

[0046] Optionally, the determination module is also used to determine that the real-time heating mode of the variable frequency water heater is the first heating mode if the current heating mode of the variable frequency water heater is the second heating mode and if the water outlet temperature is greater than or equal to the set temperature minus the seventh threshold.

[0047] Optionally, the determination module is further configured to determine that the real-time heating mode of the variable frequency water heater is the first heating mode if the current heating mode of the variable frequency water heater is the third heating mode and the following conditions are met:

[0048] The outlet water temperature is greater than the set temperature minus an eleventh threshold, and the inlet water temperature drops to be less than or equal to the fifth threshold within the preset time, and the eleventh threshold is less than the seventh threshold and greater than the second threshold;

[0049] If the current heating mode of the variable frequency water heater is the third heating mode, then the real-time heating mode of the variable frequency water heater is determined to be the second heating mode when the following conditions are met:

[0050] The outlet water temperature is greater than the set temperature minus the eleventh threshold, and the inlet water temperature drops to be greater than the fifth threshold within the preset time.

[0051] Optionally, the determination module is further configured to determine, if there are multiple real-time heating modes determined based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater, the real-time heating mode with the lowest compressor frequency among the multiple real-time heating modes is determined as the target heating mode;

[0052] The control module is also used to control the variable frequency water heater to heat according to the target heating mode.

[0053] In a third aspect, an embodiment of the present application provides a heating control device for a variable frequency water heater, comprising: a memory, a processor;

[0054] The memory stores computer-executable instructions;

[0055] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0056] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the first aspect above and / or various possible implementations of the first aspect.

[0057] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementation methods of the first aspect.

[0058] The heating control method for a variable frequency water heater provided in the present application detects the inlet water temperature and the outlet water temperature of the variable frequency water heater in real time, determines the real-time heating mode of the variable frequency water heater based on the inlet water temperature, the outlet water temperature and the current heating mode and set temperature of the variable frequency water heater, and controls the variable frequency water heater to heat according to the real-time heating mode, wherein different heating modes of the variable frequency water heater correspond to different compressor frequencies; this method improves the heating efficiency of the water heater and effectively reduces the overall energy consumption of the water heater during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0060] Figure 1 Schematic diagram of the heating control method of the variable frequency water heater provided in this application Figure 1 ;

[0061] Figure 2Schematic diagram of the heating control method of the variable frequency water heater provided in this application Figure 2 ;

[0062] Figure 3 A schematic diagram of the structure of a heating control device for a variable frequency water heater provided in this application;

[0063] Figure 4 A schematic diagram of the structure of the heating control device of the variable frequency water heater provided in this application.

[0064] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0065] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0066] With the continuous development of the Internet of Things and artificial intelligence technology, smart home products are becoming more and more popular. As a part of smart home, variable frequency water heaters can achieve more accurate and efficient hot water supply by integrating intelligent heating logic and sensor technology.

[0067] At present, the temperature sensor built into the variable frequency water heater continuously detects the change of water temperature and feeds back the real-time data to the water heater control system. In this process, the set temperature set by the user through the operation interface becomes the reference point for the water heater control system. The water heater control system then starts the intelligent comparison mechanism, compares the outlet water temperature with the set temperature, and accurately controls the rise and fall of the water temperature by dynamically adjusting the output power of the heating element. Once the outlet water temperature reaches the standard, the water heater control system immediately cuts off the heating source to achieve energy-saving shutdown; and once the temperature deviates from the set temperature, the heating process is quickly restarted to ensure stable water temperature.

[0068] However, in actual application scenarios, the energy efficiency of heating elements is often limited by many factors, making it difficult to maintain the optimal state. In addition, the limitations of the water heater control system in terms of response speed and control accuracy, such as response lag or over-adjustment, may also lead to unnecessary energy loss, which in turn leads to challenges of low heating efficiency and high energy consumption. Therefore, the existing variable frequency water heater heating control process has the problems of low heating efficiency and high energy consumption.

[0069] In response to the above problems, the heating control method of the variable frequency water heater provided in this application detects the inlet and outlet water temperatures of the variable frequency water heater in real time, combines the current heating mode with the set temperature set by the user, and intelligently analyzes and dynamically adjusts to the optimal real-time heating mode. In this process, different heating modes correspond to different compressor operating frequencies to achieve precise temperature control and maximize energy efficiency. This method improves the heating efficiency of the water heater and effectively reduces the overall operating energy consumption.

[0070] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0071] Figure 1 Schematic diagram of the heating control method of the variable frequency water heater provided in this application Figure 1 The execution subject of this embodiment is, for example, a water heater control system. Figure 1 As shown, the method includes:

[0072] S101: Real-time detection of water inlet temperature and water outlet temperature of the variable frequency water heater.

[0073] In order to ensure that the variable frequency water heater can efficiently and accurately provide hot water of suitable temperature, temperature sensors are deployed at the water inlet and outlet of the variable frequency water heater. The temperature sensor can capture and record the temperature information of water flow in and out in real time, and then transmit this data to the water heater control system through the signal line. The water heater control system processes and analyzes these real-time data quickly and accurately, thereby realizing instant adjustment of the water heater heating power, ensuring that the output hot water temperature meets user needs and achieves energy-saving and environmental protection effects. This process not only demonstrates the intelligence and efficiency of modern technology, but also allows users to experience the convenience and peace of mind brought by technology while enjoying comfortable hot water.

[0074] S102: Based on the inlet water temperature, the outlet water temperature, the current heating mode and the set temperature of the variable frequency water heater, determine the real-time heating mode of the variable frequency water heater, and control the variable frequency water heater to heat according to the real-time heating mode, wherein different heating modes of the variable frequency water heater correspond to different compressor frequencies.

[0075] Among them, the current heating mode and real-time heating mode of the variable frequency water heater are: standby mode, slow heating mode, fast heating mode and rapid heating mode.

[0076] The water heater control system will use the built-in intelligent algorithm to conduct a comprehensive analysis of these data, and determine an optimal real-time heating mode in combination with the target temperature set by the user. Once the real-time heating mode is determined, the water heater control system will adjust the operating frequency of the compressor accordingly so that the water heater works according to the new heating mode. During this process, the water heater control system will continuously monitor the changes in water temperature and make fine adjustments as needed to ensure that the water temperature always remains within the range set by the user. At the same time, the water heater's display or indicator light will also display the current working status and heating mode in real time, allowing users to understand the operation of the water heater at any time.

[0077] The heating control method for a variable frequency water heater provided in an embodiment of the present application detects the inlet water temperature and the outlet water temperature of the variable frequency water heater in real time, determines the real-time heating mode of the variable frequency water heater based on the inlet water temperature, the outlet water temperature and the current heating mode and set temperature of the variable frequency water heater, and controls the variable frequency water heater to heat according to the real-time heating mode, wherein different heating modes of the variable frequency water heater correspond to different compressor frequencies; the method improves the heating efficiency of the water heater and effectively reduces the overall energy consumption of the water heater during operation.

[0078] Figure 2 Schematic diagram of the heating control method of the variable frequency water heater provided in this application Figure 2 ,like Figure 2 As shown, in this embodiment Figure 1 Based on the embodiment, a heating control method for a variable frequency water heater is described in detail, and the method includes:

[0079] S201: Real-time detection of water inlet temperature and water outlet temperature of the variable frequency water heater.

[0080] Among them, step S201 is similar to step S101 and will not be repeated here.

[0081] S202: If the current heating mode of the variable frequency water heater is the standby mode, the outlet water temperature is less than the set temperature minus the first threshold value, and when the set temperature is different and the first threshold value is the same or different, the real-time heating mode of the variable frequency water heater is determined to be the first heating mode.

[0082] The first heating mode is the slow heating mode, which is a relatively gentle heating method, which means that the compressor of the water heater will run at a lower frequency, thereby gradually increasing the water temperature.

[0083] The first threshold is an adjustable parameter that provides a buffer zone based on the set temperature to ensure that the water temperature can accurately reach the user's expected range. At different set temperatures, the first threshold can remain the same or be adjusted according to different needs to optimize heating efficiency and user experience.

[0084] Understandably, in order to ensure that the variable frequency water heater can respond intelligently to water temperature requirements, unnecessary energy consumption and long waiting time are avoided. In standby mode, the water heater is in a low power consumption state, waiting for the user's usage needs. When it is detected that the outlet water temperature is lower than the set temperature minus the first threshold, it means that the water temperature is already lower than the user's expected comfort range, and it is necessary to start heating at this time. By setting the first threshold, the water heater control system can more flexibly handle heating requirements at different set temperatures, neither heating too early to waste energy, nor heating too late to cause the user to wait too long. When the outlet water temperature is lower than this threshold, the water heater control system will receive a signal and trigger the corresponding heating logic. In this process, the water heater control system needs to be able to respond quickly and make accurate judgments to ensure timely switching of the heating mode.

[0085] Assuming that the set temperature is ≤52°C, the first threshold is 3°C, which means that when the set temperature is ≤52°C and the water outlet temperature is <the set temperature-3°C, the real-time heating mode of the water heater is the first heating mode; assuming that 52°C <the set temperature ≤57°C, the first threshold is 4°C, which means that when 52°C <the set temperature ≤57°C and the water outlet temperature is <the set temperature-4°C, the real-time heating mode of the water heater is the first heating mode; assuming that 57°C <the set temperature ≤62°C, the first threshold is 5°C, which means that when 57°C <the set temperature ≤62°C and the water outlet temperature is <the set temperature-5°C, the real-time heating mode of the water heater is the first heating mode; assuming that the set temperature is >62°C, the first threshold is 9°C, which means that when the set temperature is >62°C and the water outlet temperature is <the set temperature-9°C, the real-time heating mode of the water heater is the first heating mode.

[0086] S203: If the current heating mode of the variable frequency water heater is the standby mode, then when the outlet water temperature is less than the set temperature minus the second threshold, and the inlet water temperature is less than the set temperature minus the third threshold, the real-time heating mode of the variable frequency water heater is determined to be the first heating mode.

[0087] The second threshold is smaller than the first threshold, and the third threshold is larger than the first threshold.

[0088] It is understandable that when both the outlet water temperature and the inlet water temperature are lower than the set temperature within a certain range, it means that the overall temperature of the water inside the water heater is low and heating needs to be started. By setting different thresholds (the second threshold is lower than the first threshold, and the third threshold is higher than the first threshold), the degree of deviation of the water temperature can be judged, so as to select the appropriate heating mode. When the inlet water temperature is also low (lower than the set temperature minus the larger third threshold), a stronger heating force may be required to quickly raise the water temperature. However, at this time, since the outlet water temperature has not deviated too far (only lower than the set temperature minus the smaller second threshold), the first heating mode (such as the slow heating mode) is selected as the starting heating mode, which is neither too radical nor too conservative, and helps to find a balance between energy saving and efficiency.

[0089] Assuming that the second threshold is 1°C and the third threshold is 15°C, when the outlet water temperature is less than the set temperature - 1°C and the inlet water temperature is less than the set temperature - 15°C, the real-time heating mode of the variable frequency water heater is the first heating mode.

[0090] S204: If the current heating mode of the variable frequency water heater is the standby mode, then if the drop value of the water inlet temperature within the preset time period is greater than or equal to the fourth threshold and less than the fifth threshold, the real-time heating mode of the variable frequency water heater is determined to be the first heating mode.

[0091] By detecting the drop in inlet water temperature within a preset time period, the water heater can predict the future trend of water temperature, so as to take heating measures in advance to avoid the water temperature being too low and affecting the user experience. At the same time, setting the fourth and fifth thresholds as trigger conditions ensures that the heating mode is only started when the water temperature drops to a certain level but has not exceeded the controllable range, so that neither excessive heating wastes energy nor too slow heating causes the water temperature to be too low.

[0092] Assuming that the preset time period is 3 minutes, the fourth threshold is 1°C, and the fifth threshold is 2°C, it means that when the inlet temperature drops by 1°C or more and less than 2°C within 3 minutes, the real-time heating mode of the variable frequency water heater is the first heating mode.

[0093] S205: If the current heating mode of the variable frequency water heater is the first heating mode, then when the water inlet temperature is less than the sixth threshold, the water outlet temperature is less than the set temperature minus the seventh threshold, and the set temperature is greater than or equal to the eighth threshold, the real-time heating mode of the variable frequency water heater is determined to be the second heating mode.

[0094] Among them, the seventh threshold is greater than or equal to the first threshold, and the eighth threshold is greater than the sixth threshold.

[0095] The second heating mode is the fast heating mode. The fast heating mode is a more efficient heating method. When the water heater needs to quickly increase the water temperature to meet the user's immediate needs, it will automatically switch to the fast heating mode.

[0096] The compressor frequency corresponding to the second heating mode is higher than the compressor frequency corresponding to the first heating mode.

[0097] It can be understood that when the variable frequency water heater is currently operating in the first heating mode, if the following five conditions are met at the same time: the water inlet temperature is lower than the sixth threshold, the water outlet temperature is lower than the value obtained by subtracting the seventh threshold from the set temperature, the set temperature is not lower than the eighth threshold, the seventh threshold is not less than the first threshold, and the eighth threshold is greater than the sixth threshold, it means that the heating efficiency of the water heater is not enough to maintain the water temperature within the set temperature range, or the water temperature has dropped significantly. At this time, in order to improve the heating efficiency and quickly restore the water temperature, the water heater will automatically switch the heating mode to the second heating mode. The fast heating mode achieves rapid heat transfer and rapid heating of water by increasing the operating frequency of the compressor, thereby meeting the immediate needs of users.

[0098] Assuming that the sixth threshold is 32°C, the seventh threshold is 9°C, and the eighth threshold is 38°C, when the inlet water temperature is less than 32°C, and the outlet water temperature is less than the set temperature - 9°C, and the set temperature is ≥ 38°C, the real-time heating mode of the variable frequency water heater is the second heating mode.

[0099] S206: If the current heating mode of the variable frequency water heater is any one of the standby mode, the first heating mode, and the second heating mode, then when the set temperature is greater than or equal to the ninth threshold and the water outlet temperature is less than or equal to the tenth threshold, the real-time heating mode of the variable frequency water heater is determined to be the third heating mode.

[0100] Among them, the ninth threshold is greater than the tenth threshold, and the tenth threshold is greater than the eighth threshold.

[0101] The third heating mode is the rapid heating mode. In the rapid heating mode, the compressor of the variable frequency water heater runs at a much higher frequency than the conventional heating mode to quickly increase the water temperature and meet the needs of users who need a large amount of hot water in a short time.

[0102] The compressor frequency corresponding to the third heating mode is higher than the compressor frequency corresponding to the second heating mode.

[0103] It is understandable that when the variable frequency water heater is in any of the current heating modes of the standby mode, the first heating mode or the second heating mode, if it is detected that the set temperature reaches or exceeds the ninth threshold, while the outlet water temperature remains at or below the tenth threshold, and the ninth threshold is greater than the tenth threshold, and the tenth threshold is greater than the eighth threshold, it means that the set temperature is already very high, but the outlet water temperature is abnormally low, and the heating capacity or efficiency of the water heater is not enough to meet the current use needs, then the water heater will automatically adjust the current heating mode to the third heating mode. In this mode, the compressor of the water heater will run at a higher frequency than the second heating mode to quickly respond and increase the water temperature.

[0104] Assuming that the ninth threshold value is 46°C and the tenth threshold value is 40°C, when the set temperature is ≥46°C and the outlet water temperature is ≤40°C, the real-time heating mode of the variable frequency water heater is the third heating mode.

[0105] S207: If the current heating mode of the variable frequency water heater is any one of the standby mode, the first heating mode, and the second heating mode, then when the set temperature is less than the ninth threshold and the water outlet temperature is less than or equal to the set temperature minus the seventh threshold, the real-time heating mode of the variable frequency water heater is determined to be the third heating mode.

[0106] Among them, the compressor frequency corresponding to the third heating mode is higher than the compressor frequency corresponding to the second heating mode.

[0107] It can be understood that when the variable frequency water heater is currently in any of the standby mode, the first heating mode or the second heating mode, if two conditions are met at the same time: the set temperature is lower than the ninth threshold, and the outlet water temperature does not exceed the value obtained by subtracting the seventh threshold from the set temperature, it means that the current set temperature is low and the outlet water temperature is also significantly lower than the user's expected level, indicating that the water heater needs to adopt a more active heating strategy to meet the user's hot water needs. Then the water heater will automatically adjust its heating mode to the third heating mode.

[0108] Assuming that the ninth threshold is 46°C and the seventh threshold is 9°C, when the set temperature is less than 46°C, the outlet water temperature is less than or equal to the set temperature - 9°C, and the real-time heating mode of the variable frequency water heater is the third heating mode.

[0109] S208: If the current heating mode of the variable frequency water heater is any one of the first heating mode, the second heating mode, and the third heating mode, then when the outlet water temperature is greater than or equal to the set temperature, the real-time heating mode of the variable frequency water heater is determined to be the standby mode.

[0110] First, when the outlet water temperature reaches or exceeds the set temperature, the water heater control system will automatically trigger the switching logic and adjust the water heater's heating mode to standby mode. In standby mode, the water heater may maintain a certain insulation power to keep the water temperature stable, or completely turn off the heating element until the user uses it again or the system detects that the water temperature has dropped and needs to be reheated. Avoid unnecessary energy waste, because it is redundant to continue heating when the water temperature has reached or exceeded the user's requirements. Secondly, keeping the water temperature within the set temperature range not only meets the user's immediate water needs, but also avoids the potential safety hazards caused by excessive water temperature, such as excessive wear and tear of the internal components of the water heater. Finally, the smart switching function improves the intelligence level of the water heater, allowing users to enjoy a comfortable, safe and energy-saving hot water experience without manual adjustment.

[0111] S209: If the current heating mode of the variable frequency water heater is the second heating mode, then when the outlet water temperature is greater than or equal to the set temperature minus the seventh threshold, determine that the real-time heating mode of the variable frequency water heater is the first heating mode.

[0112] When the outlet water temperature reaches or exceeds the condition of the set temperature minus the seventh threshold, the water heater control system will automatically execute the switching command to adjust the heating mode of the water heater from the second heating mode to the first heating mode.

[0113] By setting a threshold value lower than the set temperature as the switching condition, the water heater can adjust the heating power more flexibly to avoid the water temperature being too high or too low, thereby providing a more stable and comfortable water temperature experience. When the water temperature is close to but has not yet reached the target temperature set by the user, switching to the first heating mode with a potentially lower power can reduce unnecessary energy consumption and achieve energy-saving effects while meeting user needs.

[0114] S210: If the current heating mode of the variable frequency water heater is the third heating mode, then when the outlet water temperature is greater than the set temperature minus the eleventh threshold, and the inlet water temperature drops to less than or equal to the fifth threshold within the preset time, the real-time heating mode of the variable frequency water heater is determined to be the first heating mode.

[0115] Among them, the eleventh threshold is smaller than the seventh threshold and larger than the second threshold.

[0116] When the water heater is currently operating in the third heating mode, the water heater control system will monitor the changes in the water outlet temperature and the water inlet temperature, and determine whether it is necessary to switch the real-time heating mode of the water heater to the first heating mode which is more energy-saving or adapted to current usage needs, based on the fact that the water outlet temperature must be higher than the set temperature minus the eleventh threshold, and the water inlet temperature drops below the fifth threshold within the preset time.

[0117] Assuming that the eleventh threshold is 5°C, the preset time is 3 minutes, and the fifth threshold is 2°C, the outlet water temperature is greater than the set temperature -5°C, and the inlet water temperature drops by ≤2°C within 3 minutes, the real-time heating mode of the variable frequency water heater is the first heating mode.

[0118] S211: If the current heating mode of the variable frequency water heater is the third heating mode, then when the outlet water temperature is greater than the set temperature minus the eleventh threshold, and the inlet water temperature drops to greater than the fifth threshold within the preset time, the real-time heating mode of the variable frequency water heater is determined to be the second heating mode.

[0119] If the variable frequency water heater is currently in the third heating mode, and the outlet water temperature remains higher than the set temperature minus the eleventh threshold, and the inlet water temperature decreases within the preset time period but remains above the fifth threshold, the water heater control system will automatically adjust the real-time heating mode of the water heater to the second heating mode to optimize energy consumption while maintaining a stable water temperature.

[0120] Assuming that the eleventh threshold is 5°C, the preset time is 3 minutes, and the fifth threshold is 2°C, the outlet water temperature is greater than the set temperature -5°C, and the inlet water temperature drops by more than 2°C within 3 minutes, the real-time heating mode of the variable frequency water heater is the second heating mode.

[0121] S212: If multiple real-time heating modes are determined based on the inlet water temperature, the outlet water temperature, the current heating mode and the set temperature of the variable frequency water heater, the real-time heating mode with the lowest compressor frequency among the multiple real-time heating modes is determined as the target heating mode, and the variable frequency water heater is controlled to heat according to the target heating mode.

[0122] When the water heater control system makes a comprehensive judgment based on the variable frequency water heater's inlet water temperature, outlet water temperature, current heating mode, and the temperature value set by the user, and finds that there are multiple real-time heating modes that can meet the current conditions, the water heater control system will intelligently select a mode with the lowest compressor operating frequency as the target heating mode. This is because lower compressor frequencies usually mean lower energy consumption and gentler operating conditions, which helps to save energy, reduce emissions, and extend equipment life. After selecting the target heating mode, the water heater control system will immediately control the variable frequency water heater to heat according to this mode to ensure that the user's hot water needs are met while achieving optimal energy utilization.

[0123] Assuming that the current heating mode of the variable frequency water heater is the second heating mode, when the outlet water temperature ≥ the set temperature, the real-time heating mode of the variable frequency water heater is the standby mode; when the outlet water temperature ≥ the set temperature -9°C, the real-time heating mode of the variable frequency water heater is the first heating mode; then, when the outlet water temperature ≥ the set temperature, the real-time heating mode of the variable frequency water heater is the standby mode and the first heating mode. At this time, the target heating mode is the standby mode, and the variable frequency water heater is controlled to heat according to the target heating mode.

[0124] The heating control method of the variable frequency water heater provided in the embodiment of the present application detects the inlet water temperature and outlet water temperature of the variable frequency water heater in real time. If the current heating mode of the variable frequency water heater is the standby mode, the real-time heating mode of the variable frequency water heater is determined to be the first heating mode when any of the following conditions are met: the outlet water temperature is less than the set temperature minus the first threshold value, and the first threshold value is the same or different when the set temperature is different; the outlet water temperature is less than the set temperature minus the second threshold value, and the inlet water temperature is less than the set temperature minus the third threshold value, wherein the second threshold value is less than the first threshold value, and the third threshold value is greater than the first threshold value; the drop value of the inlet water temperature within the preset time period is greater than or equal to the fourth threshold value and less than the fifth threshold value. If the current heating mode of the variable frequency water heater is the first heating mode, the real-time heating mode of the variable frequency water heater is determined to be the second heating mode when the following conditions are met, wherein the compressor frequency corresponding to the second heating mode is higher than the compressor frequency corresponding to the first heating mode: the inlet water temperature is less than the sixth threshold value, the outlet water temperature is less than the set temperature minus the seventh threshold value, and the set temperature is greater than or equal to the eighth threshold value, wherein the seventh threshold value is greater than or equal to the first threshold value, and the eighth threshold value is greater than the sixth threshold value. If the current heating mode of the variable frequency water heater is any one of the standby mode, the first heating mode, and the second heating mode, then if any of the following conditions is met, the real-time heating mode of the variable frequency water heater is determined to be the third heating mode, wherein the compressor frequency corresponding to the third heating mode is higher than the compressor frequency corresponding to the second heating mode: the set temperature is greater than or equal to the ninth threshold, and the outlet water temperature is less than or equal to the tenth threshold, the ninth threshold is greater than the tenth threshold, and the tenth threshold is greater than the eighth threshold; the set temperature is less than the ninth threshold, and the outlet water temperature is less than or equal to the set temperature minus the seventh threshold. If the current heating mode of the variable frequency water heater is any one of the first heating mode, the second heating mode, and the third heating mode, then if the outlet water temperature is greater than or equal to the set temperature, the real-time heating mode of the variable frequency water heater is determined to be the standby mode. If the current heating mode of the variable frequency water heater is the second heating mode, then if the outlet water temperature is greater than or equal to the set temperature minus the seventh threshold, the real-time heating mode of the variable frequency water heater is determined to be the first heating mode. If the current heating mode of the variable frequency water heater is the third heating mode, then when the following conditions are met, the real-time heating mode of the variable frequency water heater is determined to be the first heating mode: the outlet water temperature is greater than the set temperature minus the eleventh threshold, and the inlet water temperature drops to less than or equal to the fifth threshold within the preset time, and the eleventh threshold is less than the seventh threshold and greater than the second threshold; if the current heating mode of the variable frequency water heater is the third heating mode, then when the following conditions are met, the real-time heating mode of the variable frequency water heater is determined to be the second heating mode: the outlet water temperature is greater than the set temperature minus the eleventh threshold, and the inlet water temperature drops to greater than the fifth threshold within the preset time.If multiple real-time heating modes are determined based on the inlet water temperature, outlet water temperature, current heating mode of the variable frequency water heater and set temperature, the real-time heating mode with the lowest compressor frequency among the multiple real-time heating modes is determined as the target heating mode, and the variable frequency water heater is controlled to heat according to the target heating mode. This method improves the heating efficiency of the water heater and effectively reduces the overall energy consumption of the water heater during operation.

[0125] Figure 3 The schematic diagram of the heating control device for the variable frequency water heater provided in this application is as follows: Figure 3 As shown, the heating control device 300 of the variable frequency water heater provided in this embodiment includes:

[0126] The detection module 301 is used to detect the water inlet temperature and water outlet temperature of the variable frequency water heater in real time;

[0127] A determination module 302 is used to determine a real-time heating mode of the variable frequency water heater based on the inlet water temperature, the outlet water temperature, the current heating mode and the set temperature of the variable frequency water heater, wherein different heating modes of the variable frequency water heater correspond to different compressor frequencies;

[0128] The control module 303 is used to control the variable frequency water heater to perform heating according to the real-time heating mode.

[0129] Optionally, the determination module 302 is further configured to determine that the real-time heating mode of the variable frequency water heater is the first heating mode if any of the following conditions is met, if the current heating mode of the variable frequency water heater is the standby mode:

[0130] The outlet water temperature is less than the set temperature minus the first threshold value, and the first threshold value is the same or different when the set temperature is different;

[0131] The water outlet temperature is less than the set temperature minus the second threshold, and the water inlet temperature is less than the set temperature minus the third threshold, wherein the second threshold is less than the first threshold, and the third threshold is greater than the first threshold;

[0132] The drop value of the inlet water temperature within the preset time period is greater than or equal to the fourth threshold and less than the fifth threshold.

[0133] Optionally, the determination module 302 is further configured to determine that the real-time heating mode of the variable frequency water heater is a second heating mode if the current heating mode of the variable frequency water heater is the first heating mode and the following conditions are met, wherein the compressor frequency corresponding to the second heating mode is higher than the compressor frequency corresponding to the first heating mode:

[0134] The inlet water temperature is less than the sixth threshold, the outlet water temperature is less than the set temperature minus the seventh threshold, and the set temperature is greater than or equal to the eighth threshold, wherein the seventh threshold is greater than or equal to the first threshold, and the eighth threshold is greater than the sixth threshold.

[0135] Optionally, the determination module 302 is further configured to determine that the real-time heating mode of the variable frequency water heater is a third heating mode if the current heating mode of the variable frequency water heater is any one of the standby mode, the first heating mode, and the second heating mode, and if any of the following conditions is met, wherein the compressor frequency corresponding to the third heating mode is higher than the compressor frequency corresponding to the second heating mode:

[0136] The set temperature is greater than or equal to the ninth threshold, and the outlet water temperature is less than or equal to the tenth threshold, the ninth threshold is greater than the tenth threshold, and the tenth threshold is greater than the eighth threshold;

[0137] The set temperature is less than the ninth threshold, and the outlet water temperature is less than or equal to the set temperature minus the seventh threshold.

[0138] Optionally, the determination module 302 is also used to determine that the real-time heating mode of the variable frequency water heater is the standby mode if the current heating mode of the variable frequency water heater is any one of the first heating mode, the second heating mode, and the third heating mode, and when the water outlet temperature is greater than or equal to the set temperature.

[0139] Optionally, the determination module 302 is also used to determine that the real-time heating mode of the variable frequency water heater is the first heating mode if the current heating mode of the variable frequency water heater is the second heating mode and the outlet water temperature is greater than or equal to the set temperature minus the seventh threshold.

[0140] Optionally, the determination module 302 is further configured to determine that the real-time heating mode of the variable frequency water heater is the first heating mode if the current heating mode of the variable frequency water heater is the third heating mode and the following conditions are met:

[0141] The outlet water temperature is greater than the set temperature minus the eleventh threshold, and the inlet water temperature drops to less than or equal to the fifth threshold within the preset time, and the eleventh threshold is less than the seventh threshold and greater than the second threshold;

[0142] If the current heating mode of the variable frequency water heater is the third heating mode, then the real-time heating mode of the variable frequency water heater is determined to be the second heating mode when the following conditions are met:

[0143] The outlet water temperature is greater than the set temperature minus the eleventh threshold, and the inlet water temperature drops to be greater than the fifth threshold within a preset time.

[0144] Optionally, the determination module 302 is further configured to determine, if multiple real-time heating modes are determined based on the inlet water temperature, the outlet water temperature, the current heating mode of the variable frequency water heater, and the set temperature, the real-time heating mode with the lowest compressor frequency among the multiple real-time heating modes as the target heating mode;

[0145] The control module 303 is also used to control the variable frequency water heater to perform heating according to the target heating mode.

[0146] The heating control device for the variable frequency water heater provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be described in detail here.

[0147] Figure 4 This is a schematic diagram of the structure of the heating control device of the variable frequency water heater provided in this application. Figure 4 As shown, the electronic device 40 provided in this embodiment includes: at least one processor 401 and a memory 402. Optionally, the device 400 further includes a communication component 403. The processor 401, the memory 402 and the communication component 403 are connected via a bus 404.

[0148] In a specific implementation process, at least one processor 401 executes the computer-executable instructions stored in the memory 402, so that at least one processor 401 executes the above method.

[0149] The specific implementation process of the processor 401 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0150] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the invention can be directly implemented as a hardware processor, or can be implemented by a combination of hardware and software modules in the processor.

[0151] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0152] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0153] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0154] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0155] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0156] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0157] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0158] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0159] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0160] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0161] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0162] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A heating control method for a variable frequency water heater, characterized in that: include: Real-time detection of water inlet temperature and water outlet temperature of the variable frequency water heater; Based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater, the real-time heating mode of the variable frequency water heater is determined, and the variable frequency water heater is controlled to heat according to the real-time heating mode, wherein different heating modes of the variable frequency water heater correspond to different compressor frequencies.

2. The method according to claim 1, characterized in that The determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater comprises: If the current heating mode of the variable frequency water heater is the standby mode, then the real-time heating mode of the variable frequency water heater is determined to be the first heating mode when any of the following conditions is met: The outlet water temperature is less than the set temperature minus a first threshold value, and when the set temperatures are different, the first threshold values ​​are the same or different; The outlet water temperature is less than the set temperature minus a second threshold, and the inlet water temperature is less than the set temperature minus a third threshold, wherein the second threshold is less than the first threshold, and the third threshold is greater than the first threshold; The drop value of the inlet water temperature within the preset time period is greater than or equal to the fourth threshold and less than the fifth threshold.

3. The method according to claim 2, characterized in that The determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater comprises: If the current heating mode of the variable frequency water heater is the first heating mode, then the real-time heating mode of the variable frequency water heater is determined to be the second heating mode when the following conditions are met, wherein the compressor frequency corresponding to the second heating mode is higher than the compressor frequency corresponding to the first heating mode: The water inlet temperature is less than a sixth threshold, the water outlet temperature is less than the set temperature minus a seventh threshold, and the set temperature is greater than or equal to an eighth threshold, wherein the seventh threshold is greater than or equal to the first threshold, and the eighth threshold is greater than the sixth threshold.

4. The method according to claim 3, characterized in that: The determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater comprises: If the current heating mode of the variable frequency water heater is any one of the standby mode, the first heating mode, and the second heating mode, then when any of the following conditions is met, it is determined that the real-time heating mode of the variable frequency water heater is the third heating mode, wherein the compressor frequency corresponding to the third heating mode is higher than the compressor frequency corresponding to the second heating mode: The set temperature is greater than or equal to a ninth threshold, and the outlet water temperature is less than or equal to a tenth threshold, the ninth threshold is greater than the tenth threshold, and the tenth threshold is greater than the eighth threshold; The set temperature is less than the ninth threshold, and the outlet water temperature is less than or equal to the set temperature minus the seventh threshold.

5. The method according to claim 4, characterized in that The determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater comprises: If the current heating mode of the variable frequency water heater is any one of the first heating mode, the second heating mode, and the third heating mode, then when the water outlet temperature is greater than or equal to the set temperature, the real-time heating mode of the variable frequency water heater is determined to be the standby mode.

6. The method according to claim 4, characterized in that The determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater comprises: If the current heating mode of the variable frequency water heater is the second heating mode, then when the outlet water temperature is greater than or equal to the set temperature minus the seventh threshold, the real-time heating mode of the variable frequency water heater is determined to be the first heating mode.

7. The method according to claim 4, characterized in that The determining the real-time heating mode of the variable frequency water heater based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater comprises: If the current heating mode of the variable frequency water heater is the third heating mode, then the real-time heating mode of the variable frequency water heater is determined to be the first heating mode when the following conditions are met: The outlet water temperature is greater than the set temperature minus an eleventh threshold, and the inlet water temperature drops to be less than or equal to the fifth threshold within the preset time, and the eleventh threshold is less than the seventh threshold and greater than the second threshold; If the current heating mode of the variable frequency water heater is the third heating mode, then the real-time heating mode of the variable frequency water heater is determined to be the second heating mode when the following conditions are met: The outlet water temperature is greater than the set temperature minus the eleventh threshold, and the inlet water temperature drops to be greater than the fifth threshold within the preset time.

8. The method according to any one of claims 2 to 7, characterized in that: Also includes: If multiple real-time heating modes are determined based on the water inlet temperature, the water outlet temperature, the current heating mode and the set temperature of the variable frequency water heater, the real-time heating mode with the lowest compressor frequency among the multiple real-time heating modes is determined as the target heating mode, and the variable frequency water heater is controlled to heat according to the target heating mode.

9. A heating control device for a variable frequency water heater, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 8 when executed by a processor.

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