Intelligent control method, system and device for off-grid heat pump water heater and medium

Abstract

The application relates to an intelligent control method, system, equipment and medium of a parallel and off-grid heat pump water heater, and belongs to the technical field of heat pump control. The method comprises the following steps: controlling the heat pump water heater to run in an alternating current power limiting mode by default; acquiring an actual water temperature, a user set water temperature, a strong heating enabled temperature and a quit judgment reference temperature; if the actual water temperature is less than the enabled temperature and the enabled temperature is less than the set water temperature, the power limiting mode is removed and a strong heating mode in which alternating current power supply is greater than a power limiting threshold is entered; in the strong heating mode, if the set water temperature is greater than the reference temperature, the reference temperature is taken as a target quit temperature, and if the set water temperature is less than or equal to the reference temperature, the set water temperature is taken as the target quit temperature; and the power limiting mode is restored when the actual water temperature reaches the target quit temperature. The application takes into account the parallel and off-grid power grid limitation and the instant heating demand, and effectively avoids excessive consumption of electric energy under a high set water temperature.

Description

Technical Field

[0001] This application relates to the field of heat pump control technology, and in particular to an intelligent control method, system, device and medium for on-grid and off-grid heat pump water heaters. Background Technology

[0002] With the advancement of energy conservation and emission reduction policies and the popularization of photovoltaic and energy storage technologies, grid-connected and off-grid heat pump water heaters have been widely used. To reduce grid load or adapt to energy storage power supply scenarios, existing grid-connected and off-grid heat pump water heaters generally have AC power limiting control functions. By default, the system restricts AC power from being used for high-power heating operation, allowing only DC power or low-power AC power to maintain basic operation.

[0003] However, in practical applications, this one-size-fits-all power-limiting control strategy has significant limitations. When the water temperature in the hot water tank is low and the user has an immediate and large demand for hot water, the heat pump water heater's heating speed is extremely slow due to the power-limiting mode, resulting in a poor user experience. To address this issue, some existing technologies allow users to manually turn off the power-limiting mode, allowing the heat pump water heater to operate at full power throughout. However, this method not only requires frequent manual intervention, but also means that the system will continue to heat at high power until the water temperature reaches a higher set value. This seriously violates the original intention of power-limiting energy saving for on-grid and off-grid devices, causing unnecessary energy waste. Summary of the Invention

[0004] In view of the above problems, this application provides an intelligent control method, system, device and medium for on-grid and off-grid heat pump water heaters. Through a three-party temperature condition triggering and reference temperature dynamic exit mechanism, the heat pump water heater can realize on-demand tiered heating and prevent excessive consumption under power restriction conditions, thus balancing the instant heating demand and comprehensive energy saving limitations.

[0005] In a first aspect, embodiments of this application provide an intelligent control method for on-grid and off-grid heat pump water heaters, including: The heat pump water heater is controlled to operate in AC power limiting mode by default. In AC power limiting mode, the AC power supply heating power of the heat pump water heater is limited to not exceeding the preset power limiting power threshold. The actual water temperature of the heat pump water heater, the user-set water temperature, the powerful heating enable temperature, and the exit judgment benchmark temperature are obtained. If the actual water temperature is lower than the strong heating enable temperature, and the strong heating enable temperature is lower than the user-set water temperature, then the AC power limiting mode is released, and the heat pump water heater is controlled to enter the strong heating mode. In the strong heating mode, the AC power supply is controlled to participate in heating, and the AC power supply heating power is greater than the preset power limiting power threshold. During the operation of the powerful heating mode, the target exit temperature is determined based on the relationship between the user-set water temperature and the exit judgment benchmark temperature; When the actual water temperature reaches the target exit temperature, the heat pump water heater is controlled to exit the powerful heating mode and return to the AC power restriction mode.

[0006] In one embodiment, the step of deactivating the AC power restriction mode and controlling the heat pump water heater to enter the powerful heating mode includes: Generate trigger command; Based on the trigger command, and according to a control priority higher than the AC power restriction mode, the AC power restriction mode is lifted, and the heat pump water heater is controlled to enter the powerful heating mode.

[0007] In one embodiment, the step of determining the target exit temperature based on the relationship between the user-set water temperature and the exit determination benchmark temperature includes: Determine whether the user-set water temperature is greater than the exit determination benchmark temperature; If the user-set water temperature is greater than the exit determination benchmark temperature, then the exit determination benchmark temperature is determined as the target exit temperature; If the user-set water temperature is less than or equal to the exit determination benchmark temperature, then the user-set water temperature is determined as the target exit temperature.

[0008] In one embodiment, the control method further includes: During the operation of the powerful heating mode, if a change in the user-set water temperature is detected, the updated user-set water temperature is obtained. Based on the relationship between the updated user-set water temperature and the exit determination benchmark temperature, the target exit temperature is re-determined and updated. The heat pump water heater is controlled to continue operating in the powerful heating mode until the actual water temperature reaches the updated target exit temperature.

[0009] In one embodiment, the powerful heating enable temperature is a user-defined temperature threshold, and the powerful heating enable temperature is less than or equal to the exit judgment benchmark temperature; in the AC power limiting mode, the heat pump water heater is powered only by DC power, or by AC power and the AC power supply heating power is not greater than the preset power limiting power threshold.

[0010] In one embodiment, the steps of obtaining the actual water temperature of the heat pump water heater, the user-set water temperature, the powerful heating enable temperature, and the exit reference temperature include: The actual water temperature is collected in real time by a temperature sensor installed in the water tank of the heat pump water heater. In response to user input, the system obtains the user-defined water temperature and the powerful heating enable temperature. The system reads a pre-configured fixed temperature threshold and uses it as the exit determination reference temperature.

[0011] In one embodiment, the upper limit of the powerful heating enable temperature is limited to being less than or equal to the exit determination reference temperature; the value of the exit determination reference temperature is 50°C.

[0012] Secondly, embodiments of this application provide an intelligent control system for a grid-connected and off-grid heat pump water heater, including an AC power limiting control module, a parameter acquisition module, a logic judgment module, a mode switching module, and an operation control module; The AC power limiting control module is used to control the heat pump water heater to operate in AC power limiting mode by default. In AC power limiting mode, the AC power supply heating power of the heat pump water heater is limited to not exceeding the preset power limiting power threshold. The parameter acquisition module is used to acquire the actual water temperature of the heat pump water heater, the user-set water temperature, the strong heating enable temperature, and the exit judgment benchmark temperature. The logic judgment module is used to determine whether the actual water temperature is lower than the strong heating enable temperature and whether the strong heating enable temperature is lower than the user-set water temperature; and during the operation of the strong heating mode, to determine the target exit temperature based on the relationship between the user-set water temperature and the exit judgment benchmark temperature. The mode switching module is used to control the heat pump water heater to switch between the AC power restriction mode and the strong heating mode according to the judgment result of the logic judgment module. The operation control module is used to control the AC power supply to participate in heating in the powerful heating mode, and the heating power of the AC power supply is greater than the preset power limit threshold.

[0013] Thirdly, embodiments of this application provide an electronic device, including at least one processor and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and when the computer program is executed by the at least one processor, the at least one processor is able to implement the intelligent control method for on-grid and off-grid heat pump water heaters as described in any embodiment of the first aspect.

[0014] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer instructions for causing a computer to execute the intelligent control method for on-grid and off-grid heat pump water heaters described in any embodiment of the first aspect.

[0015] The intelligent control method, system, equipment, and medium for on-grid and off-grid heat pump water heaters provided in this application introduce a three-way condition judgment mechanism consisting of the actual water temperature, the strong heating enable temperature, and the user-set water temperature under AC power restriction mode. This enables the automatic on-demand triggering of the strong heating mode, taking into account both the grid load limitations in on-grid and off-grid scenarios and the user's immediate hot water demand. Simultaneously, during the operation of the strong heating mode, a target exit temperature determination logic is established based on the relationship between the exit judgment benchmark temperature and the user-set water temperature. This dynamically intervenes in the exit conditions of the strong heating mode, preventing the system from continuously heating at high power when the user sets a high water temperature, avoiding excessive energy consumption, and improving the overall energy utilization efficiency of the heat pump water heater under controlled grid conditions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly described below. Obviously, the drawings described below are only for illustrating preferred embodiments and are not intended to limit the scope of this application. In the drawings: Figure 1 This is a flowchart illustrating the intelligent control method for on-grid and off-grid heat pump water heaters provided in this application embodiment. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0019] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0020] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0021] Firstly, Embodiment 1 of this application provides an intelligent control method for a grid-connected or off-grid heat pump water heater. This method can be applied to grid-connected or off-grid heat pump water heaters with both AC and DC power supply circuits. For example... Figure 1 As shown, the method specifically includes the following steps: Step S101: Control the heat pump water heater to operate in AC power limiting mode by default. In AC power limiting mode, limit the AC power supply heating power of the heat pump water heater to no more than the preset power limiting threshold.

[0022] In practice, after the system is powered on and initialized, it automatically enters and maintains AC power-limiting mode to respond to the basic energy-saving requirements of off-grid devices in scenarios where photovoltaic energy storage or grid load is limited. In this mode, the main control chip (MCU) of the heat pump water heater limits the input of AC power by controlling relays or frequency converter drive modules.

[0023] Specifically, heat pump water heaters can be powered by DC power sources such as photovoltaic panels or battery systems to drive the compressor; or, when AC power is allowed, frequency reduction control can be used to ensure that the AC power supply heating power does not exceed a preset power limit threshold (e.g., set to a low power state of 500W or 800W), thereby maintaining basic operation and heat preservation.

[0024] Step S102: Obtain the actual water temperature of the heat pump water heater, the user-set water temperature, the strong heating enable temperature, and the exit judgment reference temperature.

[0025] In practical implementation, an NTC temperature sensor installed in the lower middle part of the water tank or at the outlet of the heat pump water heater can collect the actual water temperature of the heat pump water heater in real time. Simultaneously, the system responds to user input via the control panel, remote control, or mobile application to obtain the user-defined water temperature and the powerful heating enable temperature. The powerful heating enable temperature is a user-defined temperature threshold, representing the lowest acceptable water temperature for the user. Its upper limit is limited by the system program to be less than or equal to the exit judgment reference temperature to prevent logical conflicts. Furthermore, the system reads a pre-configured fixed temperature threshold from local non-volatile memory (such as EEPROM or Flash) as the exit judgment reference temperature. In this embodiment, the value of this exit judgment reference temperature is factory-set to 50°C.

[0026] Step S103: If the actual water temperature is lower than the strong heating enable temperature and the strong heating enable temperature is lower than the user-set water temperature, then the AC power limiting mode is deactivated and the heat pump water heater is controlled to enter the strong heating mode.

[0027] After acquiring the aforementioned temperature parameters, the system performs a three-way temperature condition judgment. Only when the combined condition of actual water temperature < powerful heating enable temperature < user-set water temperature is met is it determined that there is an urgent demand for a large amount of hot water, and the water temperature is below the user's tolerance threshold. At this time, the system generates a trigger command and, based on the trigger command, forcibly releases the power limiting logic of the AC power limiting mode according to a higher control priority than the AC power limiting mode. Subsequently, the system controls the heat pump water heater to enter the powerful heating mode. In the powerful heating mode, the system controls the AC power circuit to be fully operational, with the AC power fully participating in heating. The compressor is controlled to operate at a high frequency, and the AC power supply heating power is greater than the preset power limiting threshold (e.g., reaching 2000W or more of the rated power), thereby achieving a rapid increase in water temperature.

[0028] Step S104: During the operation of the powerful heating mode, the target exit temperature is determined based on the relationship between the user-set water temperature and the exit judgment reference temperature.

[0029] In practice, during operation in the powerful heating mode, a dynamic exit logic based on the exit judgment reference temperature (e.g., 50°C) is introduced. The specific judgment process is as follows: Determine if the user-set water temperature is greater than the exit judgment benchmark temperature; If the user sets the water temperature to be higher than the exit judgment reference temperature (for example, the user sets the water temperature to 60℃), the system determines that the current emergency heating demand only needs to reach the reference temperature to meet the basic bathing requirements. In order to avoid energy waste caused by continuous high-power heating, the exit judgment reference temperature is set as the target exit temperature. If the user sets the water temperature to be less than or equal to the exit judgment benchmark temperature (for example, the user sets the water temperature to 45℃), the system determines that the user's demand is too low and directly sets the user's water temperature (for example, 45℃) as the target exit temperature.

[0030] Step S105: When the actual water temperature reaches the target exit temperature, control the heat pump water heater to exit the strong heating mode and return to the AC power restriction mode.

[0031] During the continuous heating process in the powerful heating mode, the system continuously monitors the actual water temperature. Once the actual water temperature rises and reaches the target exit temperature determined in step S104, the system immediately cuts off the control logic of the powerful heating mode, cuts off or limits the high-power output of the AC power supply circuit, and allows the system to smoothly transition and return to the default AC power-limiting mode. Thereafter, the heat pump water heater continues to heat slowly using DC power or low-power AC power or enters the heat preservation state.

[0032] In some embodiments, the control method further includes a dynamic update step: during operation in the powerful heating mode, if the system detects a change in the user-set water temperature via the interactive interface, for example, if the user lowers the set water temperature from 60°C to 48°C during heating, the system obtains the updated user-set water temperature in real time. Subsequently, the system re-evaluates based on the relationship between the updated user-set water temperature (48°C) and the exit determination benchmark temperature (50°C). Since 48°C is less than 50°C, the system redetermines and updates the target exit temperature to 48°C. The system controls the heat pump water heater to continue operating in the powerful heating mode until the actual water temperature reaches the updated target exit temperature (48°C) and then exits.

[0033] Secondly, embodiments of this application provide an intelligent control system for a grid-connected or off-grid heat pump water heater. This system can be integrated into the main control board of the heat pump water heater and includes: The AC power limiting control module is used to control the heat pump water heater to operate in AC power limiting mode by default. In AC power limiting mode, the heat pump water heater's AC power supply heating power is limited to a preset power limiting power threshold by outputting PWM signals or relay control signals.

[0034] The parameter acquisition module, including a temperature sampling circuit and a communication interface circuit, is used to acquire the actual water temperature of the heat pump water heater, the user-set water temperature, the strong heating enable temperature, and the exit judgment reference temperature read from the local memory.

[0035] The logic judgment module, implemented using a microprocessor or microcontroller, is used to perform logical operations to determine whether the actual water temperature is lower than the strong heating enable temperature and whether the strong heating enable temperature is lower than the user-set water temperature; and during the operation of the strong heating mode, based on the relationship between the user-set water temperature and the exit judgment benchmark temperature, the target exit temperature is determined by a comparator or software algorithm.

[0036] The mode switching module controls the heat pump water heater to switch between AC power-limited mode and strong heating mode based on the judgment result of the logic judgment module. When the judgment result of the logic judgment module is yes, it outputs the highest priority control level to release the AC power-limited mode and control the heat pump water heater to enter the strong heating mode; and when the actual water temperature is detected to have reached the target exit temperature, it cancels the highest priority control level, controls the heat pump water heater to exit the strong heating mode, and restores the AC power-limited mode.

[0037] The operation control module, including the compressor drive circuit and the fan drive circuit, is used to control the AC power supply to participate in heating in the strong heating mode, and to make the AC power supply heating power greater than the preset power limit threshold.

[0038] Thirdly, embodiments of this application provide an electronic device, which can be a central controller or smart gateway for a heat pump water heater. The electronic device includes at least one processor (such as an ARM-based MCU or DSP chip) and a memory (such as RAM, ROM, or Flash memory) communicatively connected to the at least one processor. The memory stores computer program instructions executable by the at least one processor. When the computer program is called and executed by the at least one processor, it enables the at least one processor to implement the various steps of the smart control method for on-grid and off-grid heat pump water heaters as described in Embodiment 1.

[0039] In some embodiments, the intelligent control system enhances the user's physical interaction experience and provides an intuitive manual intervention mechanism, and also includes a hardware interaction module.

[0040] Specifically, the hardware interaction module includes physical control buttons located on the outer casing of the heat pump water heater or on an external control panel, such as those labeled "Smart Power Button" or "Auto Power Button," as well as corresponding button detection circuits.

[0041] The working principle of the hardware interaction module is as follows: When the system detects that the user has performed a first trigger operation on the control button, such as a single press or a 3-second long press, the hardware interaction module sends an enable signal to the main control chip. In response to this first trigger operation, the system enables the aforementioned AC power limiting control module, parameter acquisition module, logic judgment module, mode switching module, and operation control module to work together. This allows the system to automatically switch to a powerful heating mode when it determines that the water temperature is too low. At this time, the indicator light next to the button will illuminate, indicating that the intelligent control function has been activated.

[0042] When a second trigger operation is detected by the user on the control button, such as pressing it again in the active state, the hardware interaction module sends a shielding signal to the main control chip. In response to this second trigger operation, the system immediately shields the intelligent control logic triggered by the three-way temperature conditions and forces the heat pump water heater to switch and lock to the normal AC power-limiting mode. At this time, the indicator light goes out.

[0043] By setting up this hardware interaction module, users can decide with one click whether to authorize the system to perform overheating based on current electricity pricing policies (such as off-peak / peak hours), the remaining power of the home energy storage battery, or the urgency of their personal bathing needs, effectively enhancing the product's adaptability to different scenarios and user control.

[0044] Fourthly, embodiments of this application also provide a computer-readable storage medium, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code. The computer-readable storage medium stores computer instructions, which, when read and executed by a processor, cause the computer to perform various steps of the intelligent control method for on-grid and off-grid heat pump water heaters as described in Embodiment 1.

[0045] The intelligent control method, system, device, and medium for on-grid and off-grid heat pump water heaters provided in this application introduce a three-way condition judgment mechanism consisting of the actual water temperature, the strong heating enable temperature, and the user-set water temperature under AC power restriction mode. This enables the automatic on-demand triggering of the strong heating mode, taking into account both the grid load limitations in on-grid and off-grid scenarios and the user's immediate hot water demand. Simultaneously, during the operation of the strong heating mode, a target exit temperature determination logic is established based on the relationship between the exit judgment benchmark temperature and the user-set water temperature. This dynamically intervenes in the exit conditions of the strong heating mode, preventing the system from continuously heating at high power when the user sets a high water temperature, avoiding excessive energy consumption, and improving the overall energy utilization efficiency of the heat pump water heater under controlled grid conditions.

[0046] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0047] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0048] The steps in the methods of this application embodiment can be adjusted, merged, or deleted according to actual needs. The units in the apparatus of this application embodiment can be merged, divided, or deleted according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0049] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A smart control method for on-grid and off-grid heat pump water heaters, characterized in that, include: The heat pump water heater is controlled to operate in AC power limiting mode by default. In AC power limiting mode, the AC power supply heating power of the heat pump water heater is limited to not exceeding the preset power limiting power threshold. The actual water temperature of the heat pump water heater, the user-set water temperature, the powerful heating enable temperature, and the exit judgment benchmark temperature are obtained. If the actual water temperature is lower than the strong heating enable temperature, and the strong heating enable temperature is lower than the user-set water temperature, then the AC power limiting mode is released, and the heat pump water heater is controlled to enter the strong heating mode. In the strong heating mode, the AC power supply is controlled to participate in heating, and the AC power supply heating power is greater than the preset power limiting power threshold. During the operation of the powerful heating mode, the target exit temperature is determined based on the relationship between the user-set water temperature and the exit judgment benchmark temperature; When the actual water temperature reaches the target exit temperature, the heat pump water heater is controlled to exit the powerful heating mode and return to the AC power restriction mode.

2. The control method according to claim 1, characterized in that, The step of releasing the AC power restriction mode and controlling the heat pump water heater to enter the strong heating mode includes: Generate trigger command; Based on the trigger command, and according to a control priority higher than the AC power restriction mode, the AC power restriction mode is lifted, and the heat pump water heater is controlled to enter the powerful heating mode.

3. The control method according to claim 1, characterized in that, The step of determining the target exit temperature based on the relationship between the user-set water temperature and the exit determination benchmark temperature includes: Determine whether the user-set water temperature is greater than the exit determination benchmark temperature; If the user-set water temperature is greater than the exit determination benchmark temperature, then the exit determination benchmark temperature is determined as the target exit temperature; If the user-set water temperature is less than or equal to the exit determination benchmark temperature, then the user-set water temperature is determined as the target exit temperature.

4. The control method according to claim 3, characterized in that, The control method further includes: During the operation of the powerful heating mode, if a change in the user-set water temperature is detected, the updated user-set water temperature is obtained. Based on the relationship between the updated user-set water temperature and the exit determination benchmark temperature, the target exit temperature is re-determined and updated. The heat pump water heater is controlled to continue operating in the powerful heating mode until the actual water temperature reaches the updated target exit temperature.

5. The control method according to any one of claims 1 to 4, characterized in that, The powerful heating enable temperature is a user-defined temperature threshold, and the powerful heating enable temperature is less than or equal to the exit judgment benchmark temperature; in the AC power limiting mode, the heat pump water heater is powered only by DC power, or by AC power and the AC power supply heating power is not greater than the preset power limiting power threshold.

6. The control method according to claim 1, characterized in that, The steps of obtaining the actual water temperature of the heat pump water heater, the user-set water temperature, the powerful heating enable temperature, and the exit judgment reference temperature include: The actual water temperature is collected in real time by a temperature sensor installed in the water tank of the heat pump water heater. In response to user input, the system obtains the user-defined water temperature and the powerful heating enable temperature. The system reads a pre-configured fixed temperature threshold and uses it as the exit determination reference temperature.

7. The control method according to claim 6, characterized in that, The upper limit of the powerful heating enable temperature is limited to be less than or equal to the exit determination benchmark temperature; the value of the exit determination benchmark temperature is 50°C.

8. An intelligent control system for a grid-connected and off-grid heat pump water heater, characterized in that, It includes an AC power limiting control module, a parameter acquisition module, a logic judgment module, a mode switching module, and an operation control module; The AC power limiting control module is used to control the heat pump water heater to operate in AC power limiting mode by default. In AC power limiting mode, the AC power supply heating power of the heat pump water heater is limited to not exceeding the preset power limiting power threshold. The parameter acquisition module is used to acquire the actual water temperature of the heat pump water heater, the user-set water temperature, the strong heating enable temperature, and the exit judgment benchmark temperature. The logic judgment module is used to determine whether the actual water temperature is lower than the powerful heating enable temperature and whether the powerful heating enable temperature is lower than the user-set water temperature. And during operation in the powerful heating mode, the target exit temperature is determined based on the relationship between the user-set water temperature and the exit determination benchmark temperature; The mode switching module is used to control the heat pump water heater to switch between the AC power restriction mode and the strong heating mode according to the judgment result of the logic judgment module. The operation control module is used to control the AC power supply to participate in heating in the powerful heating mode, and the heating power of the AC power supply is greater than the preset power limit threshold.

9. An electronic device, characterized in that, The device includes at least one processor and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and when the computer program is executed by the at least one processor, the at least one processor is able to implement the intelligent control method for on-grid and off-grid heat pump water heaters as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to execute the intelligent control method for an on-grid or off-grid heat pump water heater as described in any one of claims 1 to 7.

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