Self-cleaning control method, device and equipment for water heater and storage medium

Abstract

The invention discloses a water heater self-cleaning control method, device and equipment and a storage medium, and the method comprises the steps that the rotating speed of a motor of a water heater is controlled to be increased to a first preset rotating speed, and the motor is controlled to operate for a first duration at the first preset rotating speed; obtaining the first motor power of the motor after the first duration; and if the difference value between the first motor power and the first power threshold value is larger than the first difference threshold value, the water heater is controlled to enter an evaporator self-cleaning mode so as to execute self-cleaning operation.

Description

Technical Field

[0001] The present application relates to, but is not limited to, the technical field of water heaters, and in particular, to a self-cleaning control method, device, equipment and storage medium for a water heater. Background Art

[0002] As a device that operates for a long time, a water heater introduces indoor or outdoor air into its interior through an air duct for heat exchange. However, due to long-term operation, dust and other impurities in the air will enter the head of the outdoor unit through the air duct, resulting in obvious dust accumulation on the surface of the coil of the evaporator inside the head, causing the evaporator to be clogged, increasing the air resistance of the air duct, reducing the air supply volume, affecting hot water heat exchange, and further affecting the hot water production capacity of the water heater.

[0003] In the related art, by detecting the operating parameters of the indoor fan, the water heater is directly controlled to perform a cleaning operation. However, there are many other interference factors that affect the operating parameters of the indoor fan, such as equipment aging or damage, and the surrounding environment being airtight. Directly controlling the water heater to perform a cleaning operation will result in frequent operations and even misoperations, causing the hot water production performance of the water heater to decline. Summary of the Invention

[0004] The present application provides a self-cleaning control method, device, equipment and storage medium for a water heater, which solves the problem that in the related art, by detecting the operating parameters of the indoor fan and directly controlling the water heater to perform a cleaning operation, it will result in frequent operations and even misoperations, causing the hot water production performance of the water heater to decline.

[0005] The technical solution of the present application is implemented as follows:

[0006] A self-cleaning control method for a water heater, characterized in that the method includes:

[0007] Controlling the speed of the motor of the water heater to be increased to a first preset speed, and controlling the motor to run at the first preset speed for a first duration;

[0008] Obtaining the first motor power of the motor after the first duration;

[0009] If the difference between the first motor power and a first power threshold is greater than a first difference threshold, controlling the water heater to enter an evaporator self-cleaning mode to perform a self-cleaning operation.

[0010] A self-cleaning control device for a water heater, characterized in that the device includes:

[0011] A processing unit, configured to control the speed of the motor of the water heater to be increased to a first preset speed, and control the motor to run at the first preset speed for a first duration;

[0012] An acquisition unit, configured to acquire the first motor power of the motor after the first time period;

[0013] The processing unit is further configured to, if the difference between the first motor power and the first power threshold is greater than the first difference threshold, control the water heater to enter the evaporator self-cleaning mode to perform a self-cleaning operation.

[0014] A water heater self-cleaning control device, the device includes:

[0015] A memory, configured to store executable instructions;

[0016] A processor, configured to execute the executable instructions stored in the memory to implement the above-mentioned water heater self-cleaning control method.

[0017] A storage medium, the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of the above-mentioned water heater self-cleaning control method.

[0018] A water heater self-cleaning control method, device, device and storage medium provided by an embodiment of the present application, the method includes: controlling the rotation speed of the motor of the water heater to be increased to a first preset rotation speed, and controlling the motor to run at the first preset rotation speed for a first time period; acquiring the first motor power of the motor after the first time period; if the difference between the first motor power and the first power threshold is greater than the first difference threshold, controlling the water heater to enter the evaporator self-cleaning mode to perform a self-cleaning operation; solving the problem in the related art that by detecting the operating parameters of the indoor fan and directly controlling the water heater to perform a cleaning operation, it will cause frequent operations and even misoperations, resulting in a decline in the performance of the water heater; in this application, after controlling the rotation speed of the motor to increase and run for a period of time, it is then judged whether to start the evaporator self-cleaning according to the first electric power. It can first increase the motor rotation speed for a period of time to make up for the air volume attenuation caused by the dirty evaporator, and when the electric power meets the judgment condition of the first difference threshold, then control the water heater to enter the evaporator self-cleaning mode, avoiding the decline in the hot water production performance of the water heater caused by frequent startup of the self-cleaning function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic flowchart of a water heater self-cleaning control method according to an embodiment of the present application;

[0020] Figure 2 It is a schematic flowchart of a water heater self-cleaning control method in an actual scenario according to an embodiment of the present application;

[0021] Figure 3 It is a schematic flowchart of an evaporator self-cleaning operation in an actual scenario according to an embodiment of the present application;

[0022] Figure 4This is a schematic structural diagram of a self - cleaning control device for a water heater according to an embodiment of the present application;

[0023] Figure 5 This is a schematic structural diagram of a self - cleaning control device for a water heater according to an embodiment of the present application. Specific embodiments

[0024] In order to make the purpose, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limitations of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0025] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0026] In the following description, the terms "first\second\third" are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence when allowed, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0028] An embodiment of the present application provides a self - cleaning control method for a water heater. Referring to Figure 1 as shown, the method includes the following steps:

[0029] Step 101: Control the speed of the motor of the water heater to increase to a first preset speed, and control the motor to run at the first preset speed for a first duration.

[0030] In an embodiment of the present application, the first preset speed is a preset motor speed for increasing the motor speed. The first duration can be a preset duration or a duration determined according to the current motor speed, and is related to the noise of the whole water heater and the air supply requirements of the air duct, and can be set according to actual needs. The present application does not make specific limitations on this.

[0031] Understandably, first control the rotation speed of the motor of the water heater to increase to the first preset rotation speed, and control the motor to run at the increased first preset rotation speed for a period of time, so that the water heater maintains normal air volume operation for a period of time at the increased motor rotation speed.

[0032] In the embodiments of the present application, the function of the water heater is to produce hot water. The application scenario of the water heater can be indoor or outdoor. When the application scenario of the water heater is indoor, the water heater can be installed in a basement or a tool room, etc. An air duct is installed on the water heater to introduce indoor or outdoor air for heat exchange. The water heater can be an integral floor-standing type or a wall-mounted type, which can be set according to requirements, and the present application does not limit this.

[0033] Understandably, the execution subject of this embodiment is the above-mentioned water heater, which has functions such as data processing, data communication, and program operation. Usually, the operation of each component in the water heater can be driven by a core controller. Therefore, the execution subject of this embodiment can also be the core controller in the above-mentioned water heater, and the core controller can be a processor.

[0034] Step 102: Obtain the first motor power of the motor after the first duration.

[0035] In the embodiments of the present application, the first motor power is the motor power detected after controlling the motor to run at the first preset rotation speed for the first duration, and this first motor power is detected and obtained.

[0036] Step 103: If the difference between the first motor power and the first power threshold is greater than the first difference threshold, control the water heater to enter the evaporator self-cleaning mode to perform self-cleaning operations.

[0037] In the embodiments of the present application, the first power threshold is a preset power threshold, which represents the motor power when the water heater is operating normally before dust and other dirt accumulate on the evaporator. When there is a lot of dust and other dirt accumulated on the surface of the evaporator, it affects the smoothness of air supply in the air duct, the air resistance increases, and the motor power decreases when the rotation speed remains unchanged. At this time, the detected motor power is on the low side.

[0038] In the embodiments of the present application, after controlling the motor to run at the increased rotation speed for a period of time, the motor power is detected again to obtain the first motor power. The detected first motor power is judged. If the difference between the detected first motor power and the preset first power threshold is still greater than the first difference threshold, that is, the first motor power still seriously deviates from the motor power range when operating normally without dust accumulation after the motor rotation speed is increased, it indicates that the dust on the surface of the evaporator still accumulates seriously at this time, and the evaporator needs to be cleaned, that is, control the water heater to enter the evaporator self-cleaning mode to perform self-cleaning operations.

[0039] A self-cleaning control method for a water heater provided by an embodiment of the present application. The method includes: controlling the rotation speed of the motor of the water heater to increase to a first preset rotation speed, and controlling the motor to operate at the first preset rotation speed for a first duration; obtaining the first motor power of the motor after the first duration; if the difference between the first motor power and a first power threshold is greater than a first difference threshold, controlling the water heater to enter an evaporator self-cleaning mode to perform a self-cleaning operation. This solves the problem in the related art that directly controlling the water heater to perform a cleaning operation by detecting the operating parameters of the indoor fan can lead to frequent operations and even misoperations, resulting in a decline in the performance of the water heater. In the present application, after controlling the rotation speed of the motor to increase and operate for a period of time, it is then determined whether to start evaporator self-cleaning based on the first electric power. First, the rotation speed of the motor can be increased for a period of time to make up for the attenuation of the air volume caused by the dirty evaporator. When the electric power meets the judgment condition of the first difference threshold, the water heater is then controlled to enter the evaporator self-cleaning mode, avoiding the decline in the hot water production performance of the water heater caused by frequent activation of the self-cleaning function.

[0040] In some embodiments of the present application, controlling the rotation speed of the motor of the water heater to increase to the first preset rotation speed in step 101 can be achieved through the following steps:

[0041] Obtaining the second motor power of the motor of the water heater;

[0042] If the difference between the second motor power and the first power threshold is greater than the first difference threshold, controlling the rotation speed of the motor to increase to the first preset rotation speed.

[0043] In an embodiment of the present application, before controlling the rotation speed of the motor of the water heater to increase to the first preset rotation speed, a detection of the motor power is first performed to obtain the second motor power of the motor of the water heater.

[0044] In an embodiment of the present application, when the difference between the second motor power and the set first power threshold is greater than the first difference threshold, the method in formula (1) can be used to control the motor to increase from the current rotation speed to the first preset rotation speed:

[0045] r new =r+r set (1)

[0046] Where r new is the first preset rotation speed, with the unit of revolutions per second;

[0047] r set is the set rotation speed increase increment value, with the unit of revolutions per second;

[0048] r is the current motor rotation speed when detecting the second power, with the unit of revolutions per second.

[0049] In the embodiments of the present application, the second motor power detected is judged. If the difference between the detected second motor power and the preset first power threshold is greater than the first difference threshold, it indicates that there may be factors affecting the motor power such as dust accumulation on the evaporator surface of the water heater. To avoid affecting the hot water production performance of the water heater and to prevent misjudgment in a single motor power judgment, the evaporator self-cleaning operation is not performed at this time. Instead, the motor speed is first controlled to increase from the current speed corresponding to the current second motor power to the first preset speed to make up for the air volume attenuation caused by the decrease in motor power, so that the water heater can continue to operate in a good performance state for a period of time, preventing the decrease in the hot water production performance of the water heater caused by frequent startup of the self-cleaning function, and maximizing the utilization of the equipment / machine margin.

[0050] Further, in some embodiments of the present application, obtaining the second motor power of the motor of the water heater can be achieved through the following steps:

[0051] Obtain the first working time and the first time of the evaporator of the water heater;

[0052] If the first working time is less than the first time, obtain the second motor power.

[0053] Wherein, the first time is the self-cleaning reminder time of the evaporator.

[0054] In the embodiments of the present application, the first working time is the usage duration of the evaporator after the water heater is first turned on. It can be understood that after the water heater is first turned on, the usage duration of the evaporator is set to zero and starts to be timed, so as to obtain the usage duration of the evaporator.

[0055] In the embodiments of the present application, the usage duration of the evaporator of the water heater and the self-cleaning reminder time of the evaporator are obtained for time judgment. If the usage duration of the evaporator is less than the self-cleaning reminder time of the evaporator, the second motor power is detected and obtained to determine whether the water heater needs to perform evaporator self-cleaning according to the second motor power. In this way, even when the usage duration of the evaporator has not reached the self-cleaning reminder time of the evaporator, as long as it is judged that the evaporator needs self-cleaning, the second motor power can be quickly detected and obtained, and the next cleaning operation can be carried out in a timely manner according to the current dirty state of the evaporator, avoiding affecting the hot water production performance of the water heater due to long-term low-power operation.

[0056] Further, in some embodiments of the present application, if the first working time is greater than or equal to the first time, the water heater is controlled to enter the evaporator self-cleaning mode to perform the self-cleaning operation.

[0057] In the embodiments of the present application, the usage duration of the evaporator of the water heater and the self-cleaning reminder time of the evaporator are obtained, and time judgment is performed. If the usage duration of the evaporator is greater than or equal to the self-cleaning reminder time of the evaporator, it indicates that the usage duration of the evaporator has reached the set self-cleaning reminder time of the evaporator. At this time, the water heater is controlled to enter the evaporator self-cleaning mode to perform the self-cleaning operation. In this way, even when there is no or only a small amount of dirt on the surface of the evaporator, in the case of long-term operation of the water heater, the evaporator can still be cleaned regularly / at a fixed time according to the set self-cleaning reminder time of the evaporator, realizing the regular maintenance of the equipment and ensuring the hot water production performance of the water heater under long-term operation.

[0058] In some embodiments of the present application, in step 103, controlling the water heater to enter the evaporator self-cleaning mode to perform the self-cleaning operation can be achieved through the following steps:

[0059] Control the water pump of the inner coil of the water heater to close, and turn on the self-cleaning function of the evaporator to perform the self-cleaning operation.

[0060] In the embodiments of the present application, the inner coil is a heating component of the water heater and is arranged inside the water tank. When the water heater is a solar water heater, the heating medium, i.e., the refrigerant, in the inner coil is water heated by solar energy. A circulation water pump is arranged on the inner coil to control the flow or cut-off of the medium in the inner coil, and thus control the opening and closing of the hot water production function of the inner coil. It can be understood that when the circulation water pump of the inner coil is controlled to close, the hot water production function of the inner coil is closed, and at this time, the hot water production function inside the water tank stops; when the circulation water pump of the inner coil is controlled to open, the hot water production function of the inner coil is turned on, and at this time, the water inside the water tank is heated by using the heat exchange process between the inner coil and the water.

[0061] In the embodiments of the present application, for a water heater provided with an inner coil, before turning on the self-cleaning function of the evaporator, first control the water pump of the inner coil of the water heater to close, so that the hot water production function of the inner coil is closed, and at this time, the hot water production process inside the water tank stops. Then turn on the self-cleaning function of the evaporator to perform the self-cleaning operation. In this way, before turning on the self-cleaning function of the evaporator, first control the water pump of the inner coil to close and stop hot water production to ensure that the self-cleaning operation is carried out separately, avoid equipment operation failures, ensure the use safety and hot water production performance of the water heater, and at the same time ensure the normal execution of the evaporator self-cleaning operation.

[0062] Further, in some embodiments of the present application, turning on the self-cleaning function of the evaporator to perform the self-cleaning operation can be achieved through the following steps:

[0063] Obtain the second time;

[0064] According to the second time, turn on the self-cleaning function of the evaporator to perform the self-cleaning operation.

[0065] Among them, the second time is the self-cleaning trigger time of the evaporator. The difference from the first time is that the second time is used to trigger the water heater to perform the self-cleaning operation of the evaporator, while the first time is used to remind the user or send a self-cleaning reminder message to the device to remind the user or the device to turn on the self-cleaning function of the evaporator, and after the cleaning preparation work is done, then control the water heater to perform the self-cleaning operation of the evaporator corresponding to the second time. Among them, the cleaning preparation work includes but is not limited to turning off the water pump of the inner coil as described above.

[0066] In the embodiment of the present application, the self-cleaning trigger time of the evaporator is obtained, and time judgment is performed according to the usage duration of the evaporator of the water heater obtained above. If the usage duration of the evaporator reaches the self-cleaning trigger time of the evaporator, the self-cleaning function of the evaporator is automatically turned on, and the evaporator is controlled to perform the self-cleaning operation.

[0067] In the embodiment of the present application, as a device that operates for a long time, after the user turns on the water heater and sets the usage temperature, other operations on the water heater are not performed frequently. Therefore, for a water heater that requires self-cleaning of the evaporator, it is necessary to automatically start the self-cleaning function of the evaporator according to the self-cleaning prompt message, or send a prompt message to the user to remind the user to perform self-cleaning of the evaporator. For a water heater with a WiFi function, when the usage duration of the evaporator reaches the self-cleaning trigger time of the evaporator, a prompt message can be sent to the user through the WiFi function to prompt the user that the water heater will perform self-cleaning of the evaporator at the set self-cleaning trigger time of the evaporator. For a water heater without a WiFi function, since a prompt message cannot be sent to the user remotely, when the usage duration of the evaporator reaches the self-cleaning trigger time of the evaporator, the self-cleaning function of the evaporator is directly turned on, and the evaporator is controlled to perform the self-cleaning operation. In this way, it is ensured that the evaporator can still be self-cleaned when the water heater does not have a WiFi function, realizing regular cleaning and equipment maintenance of the water heater, and ensuring the hot water production performance of the water heater.

[0068] Further, in some embodiments of the present application, the self-cleaning function of the evaporator is turned on to perform the self-cleaning operation, which can also be realized through the following steps:

[0069] Obtain the third time; the third time is the self-cleaning trigger time obtained by correcting the standby time in the self-learning mode;

[0070] According to the third time, turn on the self-cleaning function of the evaporator to perform the self-cleaning operation.

[0071] In the embodiments of the present application, when the water heater has a self-learning mode, relevant information such as the common working hours of the water heater is statistically analyzed in the self-learning mode, and then the standby time in the self-learning mode is obtained to obtain the corrected self-cleaning trigger time. According to the corrected self-cleaning trigger time, when the usage duration of the evaporator reaches the corrected self-cleaning trigger time, the self-cleaning function of the evaporator is turned on to perform the self-cleaning operation. In this way, the self-cleaning trigger time of the evaporator is dynamically adjusted according to the user's usage habits and the actual usage situation / status of the evaporator, improving the accuracy of the self-cleaning trigger time.

[0072] Further, in some embodiments of the present application, after obtaining the first working time of the evaporator of the water heater, in step 103, controlling the water heater to enter the evaporator self-cleaning mode to perform the self-cleaning operation can be achieved through the following steps:

[0073] If the first working time is within the time range corresponding to the holiday mode, the self-cleaning function of the evaporator is turned on according to the fourth time in the holiday mode to perform the self-cleaning operation.

[0074] Wherein, the fourth time belongs to the time range corresponding to the holiday mode.

[0075] In the embodiments of the present application, the fourth time is the set duration of the holiday evaporator cleaning reminder. It can be understood that the fourth time can be the nth hour after the start of the holiday.

[0076] In the embodiments of the present application, after the user activates the holiday mode, the holiday timing starts. When the usage duration of the evaporator corresponding to the first working time reaches the set duration of the holiday evaporator cleaning reminder, the water heater is automatically controlled to turn on the self-cleaning function of the evaporator to perform the self-cleaning operation. In this way, by setting the self-cleaning reminder time in the holiday mode, it is realized that when the water heater is not used for a long time in the holiday mode, the evaporator can be automatically self-cleaned, which will not affect the hot water production process of the water heater, and the water heater can operate with better working performance after the holiday mode ends.

[0077] In some embodiments of the present application, in step 101, controlling the speed of the motor of the water heater to increase to the first preset speed can also be achieved through the following steps:

[0078] Output a prompt message for filter cleaning;

[0079] If it is detected that the filter cleaning operation is performed in response to the prompt message, obtain the air supply volume of the water heater;

[0080] Control the speed of the motor to increase to the first preset speed corresponding to the air supply volume.

[0081] In the embodiments of the present application, before the rotation speed of the motor of the water heater is increased to the first preset rotation speed, the motor power is detected once to obtain the second motor power. When the difference between the second motor power and the first power threshold is greater than the first difference threshold, a prompt message for filter cleaning is output to prompt the user to clean the filter. After the user cleans the filter, the filter cleaning operation performed in response to the prompt message is detected, the air supply volume of the water heater at this time is obtained, and the first preset rotation speed corresponding to the current air supply volume is determined. The motor is controlled to increase from the current motor rotation speed to the determined first preset rotation speed. In this way, before increasing the rotation speed of the motor, the user is first prompted to clean the filter, improving the cleanliness of the air duct, effectively improving the air supply smoothness, increasing the air volume. At this time, by increasing the rotation speed of the motor to a small extent, the motor power can be restored, reducing the energy consumption and achieving energy saving.

[0082] Further, in some embodiments of the present application, the output of the prompt message for filter cleaning can be implemented through the following steps:

[0083] Obtain the second working time of the filter of the water heater;

[0084] If the second working time is greater than or equal to the fourth time, output a prompt message; the fourth time is the cleaning reminder time of the filter.

[0085] In the embodiments of the present application, the second working time is the usage duration of the filter since the water heater is first turned on. It can be understood that after the water heater is first turned on, the usage duration of the filter is set to zero and starts to be timed, so as to obtain the usage duration of the filter.

[0086] In the embodiments of the present application, the prompt message is a prompt message for filter cleaning. The usage duration of the filter of the water heater and the cleaning reminder time of the filter are obtained. When the usage duration of the filter of the water heater is greater than or equal to the cleaning reminder time of the filter, it indicates that the filter needs to be cleaned at this time, and a prompt message for filter cleaning is output to perform the filter cleaning operation.

[0087] In some embodiments of the present application, in step 101, the water heater is controlled to enter the evaporator self-cleaning mode to perform the self-cleaning operation. Among them, the self-cleaning operation can be implemented through the following steps: sequentially perform refrigeration, frosting, defrosting, and air supply.

[0088] In the embodiments of the present application, the external coil, as a heating component of the water heater, is disposed outside the water tank. The external coil is provided with an evaporator and a condenser. The evaporator can be disposed in the outdoor unit, and the condenser is in contact with the outside of the water tank for heat exchange with the water in the water tank. The refrigerant in the external coil can be heated or cooled by electric energy. Exemplarily, when in the refrigeration stage of the self-cleaning operation, the refrigerant in the evaporator of the external coil is heated and vaporized, absorbing the heat in the surrounding air and reducing the surface temperature of the evaporator; it can be understood that when in the defrosting high-temperature stage of the self-cleaning operation, the refrigerant in the evaporator of the external coil releases its own heat to the surrounding air, increasing the surface temperature of the evaporator.

[0089] In the embodiments of the present application, the evaporator is controlled to sequentially execute the refrigeration, frosting, defrosting, and air supply stages in the self-cleaning operation to perform self-cleaning of the evaporator. The self-cleaning operation is divided into four stages, including: the refrigeration stage, the frosting stage, the defrosting stage, and the air supply stage; wherein, in the refrigeration stage, as the first stage, the compressor of the water heater is controlled to start running, and the evaporator inside the water heater head is controlled to turn on the refrigeration function, so that the air on the surface of the evaporator is quickly cooled; in the frosting stage, as the second stage, the evaporator is controlled to further refrigerate, so that frost forms on the surface of the evaporator, thereby solidifying the dirt on the surface of the evaporator on the frost; in the defrosting stage, as the third stage, the evaporator is controlled to turn on the heating function, so that the frost on the surface of the evaporator gradually melts and falls off, thereby taking the dirt on the surface of the evaporator away from the surface of the evaporator as the frost falls off; in the air supply stage, as the fourth stage, the compressor of the water heater is controlled to stop running, and the fan is controlled to continue running to blow dry the remaining water droplets on the surface of the evaporator, thereby drying the outer surface of the evaporator.

[0090] In the embodiments of the present application, compared with the self-cleaning operation in the related art, in the self-cleaning operation of the evaporator, the air discharged through the air duct of the water heater will be directly discharged to the outside during the air supply stage, and high-temperature disinfection is no longer required, achieving energy saving.

[0091] Further, in some embodiments of the present application, after the self-cleaning operation is executed, it can be achieved through the following steps:

[0092] If at least one of the following evaporator self-cleaning exit conditions is satisfied, the water heater is controlled to exit the evaporator self-cleaning mode:

[0093] A signal to exit the evaporator self-cleaning mode is received;

[0094] A signal to turn on the energy-saving mode of the water heater is received;

[0095] A signal to restart the water heater is received;

[0096] A signal to exit the vacation mode is received;

[0097] Received a signal indicating the end of the air supply stage;

[0098] Received a signal to shut down the water heater.

[0099] In the embodiments of the present application, based on the obtained motor power, the self-cleaning trigger time of the evaporator, and the time range in the vacation mode, fully combining the usage status and actual usage of the device, starting from different dimensions such as air resistance, set time, and vacation mode, it is determined whether to start the self-cleaning function of the evaporator. When the corresponding start conditions are met, the water heater is automatically controlled to turn on the self-cleaning function, perform the self-cleaning operation, and after receiving the signal indicating the exit of the evaporator self-cleaning, the water heater is automatically controlled to exit the evaporator self-cleaning mode, realizing the automatic control of the evaporator self-cleaning, effectively reducing the air volume attenuation caused by the increase in air resistance due to the dirt blockage of the evaporator, and ensuring the hot water production performance of the water heater.

[0100] As a new type of environmentally friendly refrigerant, R290 refrigerant is widely used. In the embodiments of the present application, the refrigerant of the water heater can be selected as the new type of environmentally friendly R290 refrigerant. The charging amount requirement of this type of refrigerant is less than 152g. Compared with other types of refrigerants, such as R134A refrigerant that can be charged with 1kg, the charging amount of the new type of R290 refrigerant is significantly reduced. When the evaporator accumulates dirt such as dust under the same capacity of the water tank, the same hot water output efficiency, and the same usage duration of the water heater, the increase in air resistance has a greater impact on the hot water production performance of the water heater using R290 refrigerant. In order to ensure the requirements of the air flow field in the air duct, avoid the increase in air resistance as much as possible, and reduce the impact on the water heater using R290 refrigerant, below, taking the actual scenario of the water heater self-cleaning control as an example, referring to Figure 2 As shown, the embodiments of the present application provide a method for controlling the self-cleaning of a water heater, adding a self-cleaning function to the control logic of the water heater, including two aspects: evaporator cleaning and filter cleaning. Among them, the self-cleaning function of the evaporator is triggered from three dimensions: air resistance, set timing, and vacation mode, so as to control the self-cleaning of the water heater from multiple dimensions, reduce the impact of the dirt blockage of the evaporator on the air flow field, and further ensure the hot water production performance of the water heater. The specific description is as follows:

[0101] Step 201, First power on.

[0102] Step 202, Set T zfq-ok .

[0103] After the user first turns on the water heater, the user sets the self-cleaning trigger time T zfq-ok of the evaporator, which is used to trigger the water heater to start the self-cleaning function of the evaporator.

[0104] Step 203, Set T zfq = 0.

[0105] After the user first turns on the water heater, while setting T zfq-ok , the first working time of the evaporator, that is, the usage duration T zfq of the evaporator, is reset to zero.

[0106] Step 204: Set T W = 0.

[0107] After the user first turns on the water heater, while setting T zfq-ok , the second working time of the filter screen, that is, the usage duration T W of the filter screen, is reset to zero.

[0108] Step 205: Time T W and T zfq .

[0109] Start timing the usage duration of the evaporator and simultaneously time the usage duration of the filter screen.

[0110] Step 206: Determine whether T zfq ≥ T zfq-max . If yes, go to Step 213; otherwise, go to Step 207.

[0111] Among them, T zfq-max is the set self - cleaning reminder time of the evaporator, used to remind the user of the evaporator self - cleaning. When the usage duration T zfq of the evaporator has not reached the self - cleaning reminder time T zfq-max of the evaporator, go to Step 207 to further detect the motor power to determine whether to start the evaporator self - cleaning function. When the usage duration T zfq of the evaporator is greater than or equal to the self - cleaning reminder time T zfq-max of the evaporator, it indicates that the self - cleaning reminder time T zfq-max of the evaporator has been reached, and the evaporator self - cleaning function needs to be started, then go to Step 213.

[0112] Step 207: Detect the motor power P m1 .

[0113] First, perform a detection of the motor power, that is, detect and obtain the second motor power, denoted as P m1 .

[0114] Step 208: Determine whether P m0 - P m1 ≥ ΔP1. If yes, go to Step 209 and Step 225; otherwise, return to Step 205.

[0115] Set the first power threshold, that is, the reference value P m0, used for power judgment. When the evaporator of the water heater is severely blocked by dirt, it affects the smooth air supply of the air duct, increasing the air resistance. With the motor speed unchanged, the air supply volume of the air duct will decrease due to the influence of air resistance. When the air resistance increases to a certain extent, the motor power drops to the set condition. When the first detected P m1 and the reference value P m0 of the motor power, when the difference is greater than or equal to the set difference ΔP1, it indicates that the evaporator of the water heater may be accumulating dust or dirt. First, perform the operation of increasing the motor speed and enter step 209. At the same time, considering that it may also be that the filter on the air inlet of the water heater is accumulating dust or dirt, while performing the operation of increasing the motor speed, give a cleaning reminder and perform the cleaning operation on the filter, that is, enter step 223 while entering step 209. When the first detected P m1 and the reference value P m0 of the motor power, when the difference is less than the set difference ΔP1, it indicates that there is no obvious decrease in the motor power at this time, and there is no obvious accumulation of dust or dirt on the evaporator or filter of the water heater. There is no need to perform a cleaning operation, and the water heater can continue to operate normally at the current motor speed. At this time, return to step 205 to continue timing the usage duration of the evaporator and the usage duration of the filter.

[0116] Step 209: Increase the motor speed from r by r set to r new , and maintain the operation for a period of time T lft .

[0117] When the first detected P m1 and the reference value P m0 of the motor power, when the difference is greater than or equal to the set difference ΔP1, first perform the operation of increasing the motor speed according to formula (1), increase the motor from the current speed r to r new , and maintain the operation for a period of time T lft , r set is the set speed increase increment value. In this way, when the blockage of the evaporator is not very serious, a small range of speed increase is performed to make up for the attenuation of the air volume caused by the accumulation of dust or blockage of the evaporator. At this time, the air duct noise can still be kept within an acceptable range, reducing the equipment noise while ensuring the hot water production performance of the water heater.

[0118] Step 210: Detect the motor power P m2 .

[0119] After controlling the motor to run at the increased speed r new for a period of time, perform another motor power detection, that is, detect and obtain the first motor power, denoted as P m2 .

[0120] Step 211: Determine whether P m0 -P m2 ≥ΔP1. If yes, proceed to step 213; otherwise, proceed to step 212.

[0121] Step 212: Control the motor to maintain the increased rotational speed r new for a period of time T 2ft .

[0122] When the difference between the second detected P m2 and the reference value P m0 of the motor power is less than the set difference ΔP1, it indicates that there is still no significant decrease in the motor power at this time, and there is no obvious dust or dirt accumulation on the evaporator or filter of the water heater, and no cleaning operation is required, indicating that the increased rotational speed can be continued to be used for a period of time T 2ft , at this time, control the motor to continue running for a duration T new at the increased rotational speed r 2ft , and then proceed to the next step of starting the evaporator self-cleaning function.

[0123] Step 213: Start the evaporator self-cleaning function.

[0124] Step 214: Determine whether there is an inner coil. If there is, proceed to step 215; otherwise, proceed to step 216.

[0125] When starting the evaporator self-cleaning, to prevent equipment operation failures or fault error reports, control the hot water production function of the inner coil to be turned off, that is, control the inner coil to stop heating, and proceed to step 215. If the water heater does not have an inner coil, there is no need to control the inner coil, and directly proceed to step 216.

[0126] Step 215: Control the circulation pump of the inner coil to be turned off.

[0127] Control the circulation pump of the inner coil to be turned off to control the cut-off of the medium in the inner coil and turn off the hot water production function of the inner coil.

[0128] Step 216: Determine whether there is a self-learning mode. If yes, proceed to step 217; otherwise, proceed to step 219.

[0129] When the water heater has a self-learning mode, proceed to step 217 to count relevant information such as the common working hours of the water heater in the self-learning mode to obtain the user's hot water usage habits. When the water heater does not have a self-learning mode, it is impossible to count the relevant information of the user's hot water usage. At this time, a cleaning reminder message can be output to the user, and the time to start the evaporator self-cleaning function can be made to meet the user's usage requirements through human-computer interaction, and proceed to step 219.

[0130] Step 217: Confirm the standby time of the water heater and correct Tzfq-ok.

[0131] Based on the statistically relevant information of the user's hot water usage, such as the common working periods of the water heater, determine the standby time of the water heater and correct the time T for triggering the evaporator self-cleaning function set by the user zfq-ok , so that the evaporator self-cleaning function is triggered within the standby time of the water heater, avoiding triggering the cleaning operation during the working period, and ensuring the normal hot water production function of the water heater during the working period.

[0132] Step 218: When the water heater reaches the standby time, go to Step 220.

[0133] When the water heater reaches this standby time, go to Step 220 to trigger the evaporator self-cleaning function.

[0134] Step 219: Send a prompt message to the user to perform the evaporator self-cleaning operation.

[0135] When the water heater has the WiFi function, if the water heater does not have the self-learning mode, send a prompt message to the user to remind the user that when the usage duration T of the evaporator zfq reaches the time T set by the user to trigger the evaporator self-cleaning function zfq-ok , it is necessary to timely control the evaporator to perform the self-cleaning operation and enter Step 220. When the water heater does not have the WiFi function, since it is impossible to send a prompt message to the user, directly when the usage duration T of the evaporator zfq reaches the time T set by the user to trigger the evaporator self-cleaning function zfq-ok , automatically enter Step 220 to control the evaporator to perform the self-cleaning operation.

[0136] Step 220: Control the evaporator to perform the self-cleaning operation.

[0137] Control the evaporator to sequentially perform each stage in the self-cleaning operation. Refer to Figure 3 shown, the steps include:

[0138] Step 301: Perform the refrigeration stage;

[0139] Step 302: Perform the frosting stage;

[0140] Step 303: Perform the defrosting stage;

[0141] Step 304: Perform the air supply stage.

[0142] During the self-cleaning operation of the evaporator in the embodiments of the present application, the air on the surface of the evaporator is rapidly cooled through the refrigeration stage, and the dirt on the surface of the evaporator is solidified on the ice and frost during the ice and frost stage. Then, during the defrosting high-temperature stage, the dirt solidified on the ice and frost is carried away as the ice and frost fall off. Finally, the outer surface of the evaporator is dried through the air supply stage, realizing the automatic cleaning of the evaporator. Compared with the self-cleaning operation in the related art, in the self-cleaning operation of the evaporator in the embodiments of the present application, through the air supply stage, the air discharged through the hot water machine air duct will be directly discharged outdoors, and high-temperature disinfection is no longer required, achieving energy conservation.

[0143] Step 221: When the self-cleaning exit condition of the evaporator is met, exit the self-cleaning function of the evaporator.

[0144] After controlling the evaporator to perform the self-cleaning operation and completing the air supply stage, when the above-mentioned self-cleaning exit condition of the evaporator is met, control the hot water machine to automatically exit the self-cleaning function of the evaporator.

[0145] Step 222: Control the motor speed to reduce from r new to r, and return to step 205.

[0146] After exiting the self-cleaning function of the evaporator, the evaporator reaches a clean state. At this time, the air supply fluency of the air duct is good, the air resistance is reduced, and with the motor speed unchanged, the air supply volume of the air duct will increase, causing the motor power to recover. At this time, according to the deformation formula of formula (1) r = r new -r set to control the motor speed to reduce from r new to r to restore the original operating state of the hot water machine.

[0147] Step 223: Determine whether T zfq ≥T zfq-h is satisfied. If yes, enter step 220; otherwise, return to step 205.

[0148] Among them, T zfq-h is the set duration of the holiday evaporator cleaning reminder. After the user activates the holiday mode, the holiday timing starts. When the usage duration T zfq of the evaporator is greater than or equal to the set duration T zfq-h of the holiday evaporator cleaning reminder, it indicates that the evaporator needs to be self-cleaned, and enter step 220; otherwise, return to step 205 to continue timing.

[0149] Step 224: Determine whether T W ≥T W-max is satisfied. If yes, enter step 225; otherwise, return to step 205.

[0150] Among them, T W-maxThe set duration for the filter screen cleaning reminder. Set 7 days as a judgment period, and every 7 days, judge T W and T W-max Make a judgment. When the usage duration T of the filter screen W is greater than or equal to the set duration T of the filter screen cleaning reminder W-max , it indicates that the filter screen needs to be cleaned at this time, and enter step 225.

[0151] Step 225: Send a filter screen cleaning reminder to the user and / or display a filter screen cleaning mark on the display end.

[0152] When the water heater has the WiFi function, send a reminder to the user to clean the filter screen. At the same time, turn on the indicator light of the filter screen to be cleaned mark on the display end to display the filter screen cleaning mark; when the water heater does not have the WiFi function, directly turn on the indicator light of the filter screen to be cleaned mark on the display end to display the filter screen cleaning mark.

[0153] Step 226: The user cleans the filter screen.

[0154] Step 227: Turn off the cleaning mark at the display end, exit the filter screen cleaning, and return to step 204.

[0155] When the user completes the cleaning of the filter screen, turn off the cleaning mark at the display end, indicating the exit of the filter screen cleaning. At this time, return to step 204, and set the usage duration T of the filter screen again W to zero, and start timing for the next cycle again.

[0156] In the embodiment of the present application, after first controlling the motor speed to increase and run for a period of time, then judge whether to start the evaporator self-cleaning according to the electric power. It can first increase the motor speed for a period of time to make up for the air volume attenuation caused by the dirty evaporator, and when the electric power meets the power judgment condition, then control the water heater to enter the evaporator self-cleaning mode. In this way, by detecting and judging the motor power multiple times, it avoids the decline of the hot water production performance of the water heater caused by frequent startup of the self-cleaning function. In this way, it solves the problem that in the related art, by detecting the operating parameters of the indoor fan and directly controlling the water heater to perform the cleaning operation, it will cause frequent operations and even misoperations, resulting in the decline of the water heater performance.

[0157] The embodiment of the present application provides a hot water heater self-cleaning control device 400. Refer to Figure 4 As shown, the hot water heater self-cleaning control device 400 includes: an acquisition unit 401, a processing unit 402; wherein,

[0158] The processing unit 402 is used to control the speed of the motor of the water heater to increase to a first preset speed, and control the motor to run at the first preset speed for a first duration;

[0159] An acquisition unit 401, configured to acquire the first motor power of the motor after the first duration;

[0160] A processing unit 402, further configured to, if the difference between the first motor power and the first power threshold is greater than the first difference threshold, control the water heater to enter the evaporator self-cleaning mode to perform a self-cleaning operation.

[0161] The acquisition unit 401 is further configured to acquire the second motor power of the motor of the water heater;

[0162] The processing unit 402 is further configured to, if the difference between the second motor power and the first power threshold is greater than the first difference threshold, control the speed of the motor to increase to the first preset speed.

[0163] The acquisition unit 401 is further configured to acquire the first working time and the first time of the evaporator of the water heater;

[0164] The acquisition unit 401 is further configured to, if the first working time is less than the first time, acquire the second motor power; the first time is the self-cleaning reminder time of the evaporator.

[0165] The processing unit 402 is further configured to, if the first working time is greater than or equal to the first time, control the water heater to enter the evaporator self-cleaning mode to perform a self-cleaning operation.

[0166] The processing unit 402 is further configured to control the water pump of the inner coil of the water heater to close and turn on the self-cleaning function of the evaporator to perform a self-cleaning operation.

[0167] The acquisition unit 401 is further configured to acquire the second time; the second time is the self-cleaning trigger time of the evaporator;

[0168] The processing unit 402 is further configured to, according to the second time, turn on the self-cleaning function of the evaporator to perform a self-cleaning operation.

[0169] The acquisition unit 401 is further configured to acquire the third time; the third time is the self-cleaning trigger time obtained by correcting the standby time in the self-learning mode;

[0170] The processing unit 402 is further configured to, according to the third time, turn on the self-cleaning function of the evaporator to perform a self-cleaning operation.

[0171] The processing unit 402 is further configured to, if the first working time is within the time range corresponding to the holiday mode, according to the fourth time in the holiday mode, turn on the self-cleaning function of the evaporator to perform a self-cleaning operation; the fourth time belongs to the time range.

[0172] The processing unit 402 is further configured to output a prompt message for filter cleaning;

[0173] The obtaining unit 401 is further configured to obtain the air supply volume of the water heater if a filter screen cleaning operation performed on the prompt information is detected.

[0174] The processing unit 402 is further configured to control the rotation speed of the motor to be increased to a first preset rotation speed corresponding to the air supply volume.

[0175] The obtaining unit 401 is further configured to obtain the second working time of the filter screen of the water heater.

[0176] The processing unit 402 is further configured to output a prompt message if the second working time is greater than or equal to a fourth time; the fourth time is the cleaning reminder time of the filter screen.

[0177] The processing unit 402 is further configured to control the water heater to enter the evaporator self-cleaning mode to perform a self-cleaning operation, where performing the self-cleaning operation includes: sequentially performing refrigeration, frosting, defrosting, and air supply.

[0178] The processing unit 402 is further configured to, after performing the self-cleaning operation, control the water heater to exit the evaporator self-cleaning mode when at least one of the following conditions is met:

[0179] Receiving a signal to exit the evaporator self-cleaning mode;

[0180] Receiving a signal to turn on the energy-saving mode of the water heater;

[0181] Receiving a signal to restart the water heater;

[0182] Receiving a signal to exit the vacation mode;

[0183] Receiving a signal that the air supply stage ends;

[0184] Receiving a shutdown signal of the water heater.

[0185] A self-cleaning control device for a water heater provided by an embodiment of the present application controls the rotation speed of the motor of the water heater to be increased to a first preset rotation speed through a processing unit 402, and controls the motor to run at the first preset rotation speed for a first duration; through an acquisition unit 401, the first motor power of the motor after the first duration is acquired; through the processing unit 402, if the difference between the first motor power and a first power threshold is greater than a first difference threshold, the water heater is controlled to enter an evaporator self-cleaning mode to perform a self-cleaning operation. This solves the problem in the related art that directly controlling the water heater to perform a cleaning operation by detecting the operating parameters of the indoor fan will cause frequent operations and even misoperations, resulting in a decline in the performance of the water heater; in this application, after controlling the rotation speed of the motor to increase and run for a period of time, it is then judged whether to start evaporator self-cleaning based on the first electric power. It can first increase the motor rotation speed for a period of time to make up for the air volume attenuation caused by the dirty evaporator, and when the electric power meets the judgment condition of the first difference threshold, then control the water heater to enter the evaporator self-cleaning mode, avoiding the decline in the hot water production performance of the water heater caused by frequent startup of the self-cleaning function.

[0186] An embodiment of the present application provides a self-cleaning control device 500 for a water heater. Referring to Figure 5 as shown, the self-cleaning control device 500 for a water heater includes: a memory 501, a processor 502, and a communication bus 503; wherein,

[0187] The communication bus 503 is used to realize the communication connection between the memory 501 and the processor 502;

[0188] The memory 501 is used to store executable instructions.

[0189] The processor 502 is used to execute the executable instructions stored in the memory 501 to implement the steps of the self-cleaning control method for the water heater as described above.

[0190] The processor can be an integrated circuit chip with signal processing capabilities, such as a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor can be a microprocessor or any conventional processor, etc.

[0191] The self-cleaning control device for a water heater provided by an embodiment of the present application can first control the motor to increase its rotation speed and run for a period of time, and then determine whether to start the self-cleaning of the evaporator according to the electric power. It can first increase the motor rotation speed for a period of time to make up for the air volume attenuation caused by the dirt on the evaporator, and when the electric power meets the power judgment condition, then control the water heater to enter the evaporator self-cleaning mode, avoiding the decline in the hot water production performance of the water heater caused by frequent startup of the self-cleaning function. It solves the problem in the related art that by detecting the operating parameters of the indoor fan and directly controlling the water heater to perform the cleaning operation, it will cause frequent operations and even misoperations, resulting in the decline in the hot water production performance of the water heater.

[0192] It should be noted that the description of the same steps and the same content in this embodiment and other embodiments can refer to the description in other embodiments, and will not be repeated here.

[0193] An embodiment of the present application provides a computer-readable storage medium. The computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the implementation process in the Figures 1 to 3 corresponding embodiment of the self-cleaning control method for a water heater, which will not be repeated here.

[0194] The above computer storage medium / memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a ferromagnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM), etc.; it can also be various terminals including one or any combination of the above memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc.

[0195] It should be understood that the "one embodiment" or "an embodiment" or "the embodiments of the present application" or "the foregoing embodiments" or "some embodiments" or "some implementations" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the "in one embodiment" or "in an embodiment" or "the embodiments of the present application" or "the foregoing embodiments" or "some embodiments" or "some implementations" that appear throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the magnitude of the serial numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The serial numbers of the embodiments of the present application above are only for description and do not represent the advantages or disadvantages of the embodiments.

[0196] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined, or can be integrated into another system, or some features can be ignored, or not executed. In addition, the couplings, direct couplings, or communication connections between the components shown or discussed with each other can be through some interfaces, and the indirect couplings or communication connections of devices or units can be electrical, mechanical or other forms.

[0197] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units; they can be located in one place or distributed to multiple network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0198] In addition, each functional unit in the embodiments of the present application can be all integrated in a processing unit, or each unit can be separately used as a unit, or two or more units can be integrated in one unit; the above integrated units can be implemented in the form of hardware, or in the form of a combination of hardware and software functional units.

[0199] The methods disclosed in several method embodiments provided by the present application can be combined arbitrarily without conflict to obtain new method embodiments.

[0200] The features disclosed in several product embodiments provided by the present application can be combined arbitrarily without conflict to obtain new product embodiments.

[0201] The features disclosed in several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0202] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps including the above method embodiments; and the foregoing storage medium includes: removable storage devices, read-only memory (ROM), magnetic disks, or optical disks and other various media that can store program codes.

[0203] Alternatively, if the above integrated units of this application are implemented in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of this application essentially or the part that contributes to the related technology can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the various embodiments of this application. And the foregoing storage medium includes: removable storage devices, ROM, magnetic disks, or optical disks and other various media that can store program codes.

[0204] It should be noted that the drawings in the embodiments of this application are only for illustrating the schematic positions of various components on the terminal device and do not represent their actual positions in the terminal device. The actual positions of each component or each area can be changed or offset according to the actual situation (for example, the structure of the terminal device). Moreover, the proportions of different parts in the terminal device in the figure do not represent the actual proportions.

[0205] The above is only the implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A self-cleaning control method for a water heater, characterized in that, The method includes: Controlling the rotational speed of the motor of the water heater to increase to a first preset rotational speed, and controlling the motor to operate at the first preset rotational speed for a first duration; Obtaining the first motor power of the motor after the first duration; If the difference between the first motor power and a first power threshold is greater than a first difference threshold, controlling the water heater to enter an evaporator self-cleaning mode to perform a self-cleaning operation.

2. The method according to claim 1, characterized in that, The controlling the rotational speed of the motor of the water heater to increase to the first preset rotational speed includes: Obtaining the second motor power of the motor of the water heater; If the difference between the second motor power and the first power threshold is greater than the first difference threshold, controlling the rotational speed of the motor to increase to the first preset rotational speed.

3. The method according to claim 2, characterized in that, The obtaining the second motor power of the motor of the water heater includes: Obtaining the first working time and a first time of the evaporator of the water heater; If the first working time is less than the first time, obtaining the second motor power; the first time is the self-cleaning reminder time of the evaporator.

4. The method according to claim 3, characterized in that, The method further includes: If the first working time is greater than or equal to the first time, controlling the water heater to enter the evaporator self-cleaning mode to perform a self-cleaning operation.

5. The method according to claim 4, characterized in that, The controlling the water heater to enter the evaporator self-cleaning mode to perform a self-cleaning operation includes: Controlling the water pump of the inner coil of the water heater to close, and turning on the self-cleaning function of the evaporator to perform a self-cleaning operation.

6. The method according to claim 5, characterized in that, The turning on the self-cleaning function of the evaporator to perform a self-cleaning operation includes: Obtaining a second time; the second time is the self-cleaning trigger time of the evaporator; According to the second time, turning on the self-cleaning function of the evaporator to perform a self-cleaning operation.

7. The method according to claim 5, characterized in that, The turning on the self-cleaning function of the evaporator to perform a self-cleaning operation includes: Obtaining a third time; the third time is the self-cleaning trigger time obtained by correcting the standby time in the self-learning mode; According to the third time, turning on the self-cleaning function of the evaporator to perform a self-cleaning operation.

8. The method according to claim 3, characterized in that, The method further includes: If the first working time is within the time range corresponding to the holiday mode, according to a fourth time in the holiday mode, turning on the self-cleaning function of the evaporator to perform a self-cleaning operation; the fourth time belongs to the time range.

9. The method according to claim 1, characterized in that, The controlling the rotational speed of the motor of the water heater to increase to the first preset rotational speed includes: Outputting a prompt message for filter cleaning; If a filter cleaning operation performed in response to the prompt message is detected, obtaining the air supply volume of the water heater; Controlling the rotational speed of the motor to increase to the first preset rotational speed corresponding to the air supply volume.

10. The method according to claim 9, characterized in that, The outputting the prompt message for filter cleaning further includes: Obtaining the second working time of the filter of the water heater; If the second working time is greater than or equal to a fourth time, outputting the prompt message; the fourth time is the cleaning reminder time of the filter.

11. The method according to claim 1, characterized in that, The performing the self-cleaning operation includes: sequentially performing refrigeration, frosting, defrosting, and air supply.

12. According to the method described in claim 11, wherein, After the performing the self-cleaning operation, the method further includes: If at least one of the following conditions is met, controlling the water heater to exit the evaporator self-cleaning mode: A signal to exit the self-cleaning mode of the evaporator is received; A signal to turn on the energy-saving mode of the water heater is received; A signal to restart the water heater is received; A signal to exit the vacation mode is received; A signal indicating the end of the air supply stage is received; A signal to turn off the water heater is received.

13. A self-cleaning control device for a water heater, wherein, The device includes: A processing unit for controlling the speed of the motor of the water heater to be increased to a first preset speed and controlling the motor to operate at the first preset speed for a first duration; An acquisition unit for acquiring the first motor power of the motor after the first duration; The processing unit is further configured to, if the difference between the first motor power and a first power threshold is greater than a first difference threshold, control the water heater to enter the self-cleaning mode of the evaporator to perform self-cleaning operations.

14. A self-cleaning control equipment for a water heater, wherein, The device includes: A memory for storing executable instructions; A processor for executing the executable instructions stored in the memory to implement the water heater self-cleaning control method according to any one of claims 1 to 12.

15. A computer-readable storage medium, wherein, Stored with executable instructions, when the executable instructions are executed, for causing the processor to execute the water heater self-cleaning control method according to any one of claims 1 to 12.

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