CN114739010A - Control method, device and equipment of electric water heater and computer program product - Google Patents

Abstract

The application provides a control method, a control device, control equipment and a computer program product of an electric water heater, relates to the technical field of household appliances, and is used for solving the problem that the safety of the electric water heater is low due to fire caused by melting of a connector insert. The control method of the electric water heater comprises the following steps: acquiring the current temperature of a connector of the electric water heater; acquiring a current operation mode of the electric water heater, wherein the current operation mode is a first operation mode or a second operation mode, and the operation power of the first operation mode is greater than that of the second operation mode; determining a target operation mode of the electric water heater according to the current temperature and the current operation mode, and controlling the electric water heater to switch to the target operation mode, wherein the target operation mode is the first operation mode, the second operation mode or a power-off mode.

Description

Electric water heater control method, device, equipment and computer program product

technical field

The present application relates to the technical field of household appliances, and in particular, to a control method, device, device and computer program product for an electric water heater.

Background technique

An electric water heater is a water heater that uses electricity as an energy source for heating. Electric water heaters have been widely used due to their clean energy and other advantages.

The electric water heater includes: an outer shell, an inner tank, a foam layer and an electrical chamber; the inner tank is located in the outer shell, and the foam layer and the electrical chamber are located in the space between the outer shell and the inner tank; wherein, the foam layer is used to improve the thermal insulation effect, The electrical room is used to provide a relatively safe working environment for the control system of the electric water heater. In the related art, when the connector in the electric room of the electric water heater is not properly plugged, a large contact resistance will be generated, and when the current passes through the plug, heat will be generated through the contact resistance, resulting in a sharp increase in the temperature of the contact point. When the temperature reaches a certain threshold, the connector inserts will melt.

However, since the foam material itself is flammable, the melting of the connector insert will cause the surrounding foam layer and other plastic parts to catch fire, which in turn causes the entire electric water heater to catch fire, resulting in lower safety of the electric water heater.

SUMMARY OF THE INVENTION

The present application provides a control method, device, equipment and computer program product for an electric water heater, to overcome the problem of low safety of the electric water heater caused by fire caused by the melting of the connector insert.

A first aspect of the present application is to provide a control method for an electric water heater, including:

Get the current temperature of the connector of the electric water heater;

acquiring a current operation mode of the electric water heater, where the current operation mode is a first operation mode or a second operation mode, and the operation power of the first operation mode is greater than the operation power of the second operation mode;

According to the current temperature and the current operation mode, a target operation mode of the electric water heater is determined, and the electric water heater is controlled to switch to the target operation mode, where the target operation mode is the first operation mode, the the second operating mode or power-off mode.

In one possible implementation manner, determining the target operation mode of the electric water heater according to the current temperature and the current operation mode includes:

If the current temperature is less than or equal to a first threshold, acquiring a first temperature curve of the electric water heater within a historical period, and determining the target operation mode according to the first temperature curve and the current operation mode;

If the current temperature is greater than the first threshold, the target operation mode is determined according to the current operation mode.

In one possible implementation manner, determining the target operation mode according to the first temperature curve and the current operation mode includes:

obtaining the curve slope of the first temperature curve;

If the slope of the curve is greater than or equal to a second threshold, determining the target operating mode according to the current operating mode;

If the slope of the curve is smaller than the second threshold, the target operation mode is determined according to the first temperature curve and a plurality of preset temperature curves.

In one possible implementation manner, determining the target operating mode according to the first temperature curve and a plurality of preset temperature curves includes:

obtaining the similarity between the first temperature curve and the plurality of preset temperature curves;

According to the similarity between the first temperature curve and the plurality of preset temperature curves, it is determined whether there is a target temperature curve in the plurality of preset temperature curves, the target temperature curve and the first temperature curve The similarity between them is greater than or equal to the preset similarity;

If so, determining the target operation mode according to the current operation mode;

If not, it is determined that the target operating mode is the same as the current operating mode.

In one possible implementation manner, determining the target operation mode according to the current operation mode includes:

If the current operation mode is the first operation mode, determining that the target operation mode is the second operation mode;

If the current operation mode is the second operation mode, it is determined that the target operation mode is the power-off mode.

In one possible implementation manner, a thermistor is integrated at the connector; obtaining the current temperature of the connector of the electric water heater, including:

Obtain the resistance value of the thermistor;

The current temperature is determined according to the resistance value of the thermistor.

In one possible implementation manner, if it is determined that the target operation mode of the electric water heater is the power-off mode, the method further includes:

generating fault information, and sending the fault information to the server;

Wherein, the fault information includes: geographic location information of the electric water heater and abnormal information of the connector.

A second aspect of the present application provides a control device for an electric water heater, comprising:

a first acquisition module, used to acquire the current temperature of the connector of the electric water heater;

The second obtaining module is configured to obtain the current operation mode of the electric water heater, the current operation mode is the first operation mode or the second operation mode, and the operation power of the first operation mode is greater than that of the second operation mode. operating power;

a processing module, configured to determine a target operation mode of the electric water heater according to the current temperature and the current operation mode, and control the electric water heater to switch to the target operation mode, where the target operation mode is the first an operating mode, the second operating mode, or a power-down mode.

In a possible implementation manner, the processing module is specifically used for:

When the current temperature is less than or equal to a first threshold, obtain a first temperature curve of the electric water heater within a historical period, and determine the target operation mode according to the first temperature curve and the current operation mode;

The target operating mode is determined according to the current operating mode when the current temperature is greater than the first threshold.

In a possible implementation manner, the processing module is specifically used for:

obtaining the curve slope of the first temperature curve;

When the slope of the curve is greater than or equal to a second threshold, determining the target operating mode according to the current operating mode;

When the slope of the curve is smaller than the second threshold, the target operation mode is determined according to the first temperature curve and a plurality of preset temperature curves.

In a possible implementation manner, the processing module is specifically used for:

obtaining the similarity between the first temperature curve and the plurality of preset temperature curves;

According to the similarity between the first temperature curve and the plurality of preset temperature curves, it is determined whether there is a target temperature curve in the plurality of preset temperature curves, the target temperature curve and the first temperature curve The similarity between them is greater than or equal to the preset similarity;

When a target temperature curve exists in the plurality of preset temperature curves, determining the target operation mode according to the current operation mode;

When there is no target temperature curve among the plurality of preset temperature curves, it is determined that the target operation mode is the same as the current operation mode.

In a possible implementation manner, the processing module is specifically used for:

When the current operation mode is the first operation mode, determining that the target operation mode is the second operation mode;

When the current operation mode is the second operation mode, it is determined that the target operation mode is the power-off mode.

In a possible implementation manner, a thermistor is integrated at the connector; the first acquisition module is specifically used for:

Obtain the resistance value of the thermistor;

The current temperature is determined according to the resistance value of the thermistor.

In a possible implementation manner, the processing module is further used for:

generating fault information, and sending the fault information to the server;

Wherein, the fault information includes: geographic location information of the electric water heater and abnormal information of the connector.

A third aspect of the present application provides a control device for an electric water heater, including: a processor and a memory;

The memory is used to store computer programs;

The processor is configured to execute the computer program stored in the memory to implement the control method for an electric water heater according to any one of the foregoing.

A fourth aspect of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the control method for an electric water heater according to any one of the foregoing.

In the method for controlling an electric water heater provided by the embodiment of the present application, the current temperature of the connector of the electric water heater is obtained; the current operation mode of the electric water heater is obtained. The operation power of the first operation mode is greater than the operation power of the second operation mode; according to the current temperature and the current operation mode, the target operation mode of the electric water heater is determined, and the electric water heater is controlled to switch to the desired operation mode. The target operation mode is the first operation mode, the second operation mode or the power-off mode. In this way, when the current temperature of the connector is abnormal due to poor connection at the connection point between the male end and the female end of the connector, the target operation mode of the electric water heater can be determined in time according to the current operation mode of the electric water heater. The operation power of the current operation mode is lower than The current operation mode or the target operation mode is not powered off, which is beneficial to alleviate the abnormal temperature problem at the connector and avoid accidents such as fire caused by the temperature rise caused by the poor connection at the connector, thereby reliably improving the safety of the electric water heater. sex.

Description of drawings

The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and the present application is not limited to the following specific embodiments.

FIG. 1 is a schematic structural diagram of an electric water heater provided by an embodiment of the application;

2 is a schematic diagram of a connection between a power cord and a power control circuit board according to an embodiment of the present application;

3 is a schematic flowchart of a control method for an electric water heater provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a connector provided by an embodiment of the present application;

5 is a schematic flowchart of a control method for an electric water heater provided by another embodiment of the present application;

6 is a schematic structural diagram of a control device for an electric water heater provided by an embodiment of the application;

FIG. 7 is a schematic diagram of a hardware structure of a control device of an electric water heater according to an embodiment of the application.

Detailed ways

The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and the present application is not limited to the following specific embodiments.

When the connector in the electrical room is poorly plugged, a large contact resistance will occur. When the current passes through the plug, it will heat up through the contact resistance, resulting in a sharp increase in the temperature of the contact point. When the temperature reaches a certain threshold, the connector inserts will melt. The melting of the insert will cause the surrounding plastic parts such as the foam layer to catch fire, which will cause the electrical room to catch fire and cause the entire water heater to catch fire and cause an accident.

In the related art, in order to improve safety, electric water heaters are usually installed with sensors. Some electric water heaters are equipped with gas-sensitive resistance fire extinguishers. When the gas-sensitive resistance fire extinguisher detects that the indoor smoke exceeds a certain threshold, the gas-sensitive resistance fire extinguisher will activate the top water spray valve to extinguish the fire. Some electric water heaters are equipped with infrared smoke sensors. When there is combustion in the space and smoke is generated, the smoke will be emitted upward. When the smoke in the air enters the infrared smoke sensor, when the smoke gathers to a certain extent, it will cause the reflection of infrared rays. If the infrared ray is received, an alarm signal will be issued. Some electric water heaters are also equipped with a video smoke sensor, which collects the flame state through the video smoke sensor and sends the collected image information to the processor for processing and judgment.

However, both the gas-resistor fire extinguisher and the infrared smoke sensor are too far away from the fire site. Usually, the real fire method and the smoke and temperature are required to be detected. This detection method has a certain time delay, which leads to the failure of the electric water heater. The safety and reliability are poor; the visual smoke sensor is easily affected by the environment, and the detection accuracy is low when the environmental interference is relatively large, resulting in poor safety and reliability of the electric water heater.

The following describes application scenarios of the embodiments of the present application with reference to FIG. 1 and FIG. 2 .

FIG. 1 is a schematic structural diagram of an electric water heater according to an embodiment of the application. Please refer to FIG. 1, the electric water heater includes: an outer shell and an inner tank arranged in the outer shell; an insulating partition is arranged between the inner tank and the outer shell, and the partition plate can be located at one end of the inner tank, and the partition plate faces away from the inner tank at one end. An electrical room is formed between the side and the outer shell; the space enclosed by the outer shell, the inner liner and the partition is filled with a foam layer. An electric heating tube can be arranged in the inner pot, and one end of the electric heating tube extends out of the inner pot and is electrically connected with the power control circuit board in the electric chamber through the partition plate. FIG. 2 is a schematic diagram of a connection between a power cable and a power control circuit board according to an embodiment of the present application. Please refer to FIG. 2, the power control circuit board is connected to the neutral wire N and the live wire L of the power line through the connector, and the power line is used to connect with the mains; wherein, the connector may include a male end and a female end that cooperate with each other, and the male end It can be arranged on the power cord, and the female end can be arranged on the power supply control circuit board, and the power cord is electrically connected with the power supply control circuit board through the cooperation of the male end and the female end.

In the control method of the electric water heater provided by this embodiment, during the working process of the electric water heater, the electric water heater can control whether the electric water heater switches the operation mode according to the temperature at the connector and the current operation mode, so as to facilitate timely control of the electric water heater to reduce the operation mode Power to reduce the actual temperature at the connector, and even control the power outage of the electric water heater in time, so as to avoid accidents such as fire caused by the temperature rise caused by the poor connection at the connector, and can reliably improve the safety of the electric water heater.

The technical solutions shown in the present application will be described in detail below through specific embodiments. It should be noted that the following embodiments may exist alone or may be combined with each other, and the same or similar content will not be repeated in different embodiments.

FIG. 3 is a schematic flowchart of a control method for an electric water heater provided by an embodiment of the present application. Referring to Figure 3, the method can include:

S101. Obtain the current temperature of the connector of the electric water heater;

The executive body of the embodiment of the present application may be an electric water heater, or may be a control device of an electric water heater provided in the electric water heater. Optionally, the control device of the electric water heater may be implemented by software, or by a combination of software and hardware.

FIG. 4 is a schematic structural diagram of a kind of connector according to an embodiment of the present application. Referring to FIG. 4 , optionally, a temperature sensor may be integrated at the male end or the female end of the connector, so as to detect the current temperature at the connector through the temperature sensor. The temperature sensor may include a thermistor such as a negative temperature coefficient thermistor (Negative Temperature Coefficient, NTC), a positive temperature coefficient thermistor (Positive Temperature Coefficient, PTC). When the thermistor is NTC, the lower the resistance of NTC, the higher the current temperature of the connector; when the thermistor is PTC, the greater the resistance of PTC, the higher the current temperature of the connector.

In other examples, the temperature sensor can also be a common sensor such as an infrared temperature sensor or a microwave sensor that can detect temperature and convert it into a usable output signal.

Taking the temperature sensor as the thermistor as an example, step S101 may specifically include: obtaining the resistance value of the thermistor; and determining the current temperature of the connector according to the resistance value of the thermistor. During specific implementation, the current temperature of the connector is determined according to the resistance value of the thermistor and the pre-stored functional relationship between the resistance value and the temperature.

Optionally, during the working process of the electric water heater, the current temperature of the connector can be obtained in real time, or the current temperature of the connector can be obtained at preset time intervals, which can be set according to actual needs. set up.

Poor connection of the connector will occur due to poor contact between the male and female ends of the connector, or overloading of power at the male and female ends of the connector, or oxidation of the male and female ends of the connector, or an open circuit. Or bad connector contacts. Poor connection of the connector will result in abnormal temperature at the connector. Therefore, in this embodiment, by obtaining the current temperature at the connector, it is beneficial to timely determine whether a poor connection occurs at the connector according to the current temperature at the connector.

S102. Acquire a current operation mode of the electric water heater, where the current operation mode is the first operation mode or the second operation mode, and the operation power of the first operation mode is greater than the operation power of the second operation mode;

Optionally, the operation modes of the electric water heater are divided in advance according to the operation power. In some examples, the electric water heater has a first operating mode and a second operating mode, and the operating power of the first operating mode is greater than the operating power of the second operating mode. For example, in the first operating mode, the operating power of the electric water heater may be 3 kW; in the second operating mode, the operating power of the electric water heater is less than 3 kW, for example, the operating power of the electric water heater is less than 2 kW or 2.5 kW.

In other examples, when there are more operation modes of the electric water heater, the operation power of each operation mode is gradually reduced.

During the working process of the electric water heater, the heating speed of the electric water heater can be improved by switching the electric water heater to an operating mode with a higher operating power. By switching the electric water heater to an operating mode with a higher operating power, it is beneficial to reduce energy consumption at the same time.

S103. Determine the target operation mode of the electric water heater according to the current temperature and the current operation mode, and control the electric water heater to switch to the target operation mode, where the target operation mode is the first operation mode, the second operation mode or the power-off mode.

Optionally, according to the current temperature of the connector and the current operating mode of the electric water heater, when the current temperature satisfies the preset condition, the electric water heater can be controlled to switch to another operating mode with a lower operating power than the current operating mode, or the electric water heater can be controlled Switching off the relay in the electrical room puts the electric water heater into power-off mode.

For example, when the current temperature is higher than the set value, or when the current temperature changes greatly relative to the temperature at the previous moment, it is determined that the current temperature satisfies the preset condition, and the temperature at the connector is determined to be abnormal. If the current operation mode is the first operation mode, the target operation mode of the electric water heater is determined to be the second operation mode, and the electric water heater is controlled to switch to the second operation mode; if the current operation mode is the second operation mode, the target operation mode of the electric water heater is determined. The operation mode is the power-off mode, and the electric water heater is controlled to switch to the power-off mode.

The method for controlling an electric water heater provided in this embodiment is obtained by acquiring the current temperature of the connector of the electric water heater; The power is greater than the operating power of the second operation mode; according to the current temperature and the current operation mode, the target operation mode of the electric water heater is determined, and the electric water heater is controlled to switch to the target operation mode, and the target operation mode is the first operation mode, the second operation mode or Power down mode. In this way, when the current temperature of the connector is abnormal due to poor connection at the connection point between the male end and the female end of the connector, the target operation mode of the electric water heater can be determined in time according to the current operation mode of the electric water heater. The operation power of the current operation mode is lower than The current operation mode or the target operation mode is not powered off, which is beneficial to alleviate the abnormal temperature problem at the connector and avoid accidents such as fire caused by temperature rise caused by poor connection at the connector, thereby reliably improving the safety of the electric water heater. sex.

FIG. 5 is a schematic flowchart of a control method for an electric water heater provided by another embodiment of the present application. Referring to FIG. 5 , in one possible implementation manner, the control method for an electric water heater provided in this embodiment includes:

S201. Obtain the current temperature of the connector of the electric water heater.

S202. Acquire the current operation mode of the electric water heater, where the current operation mode is the first operation mode or the second operation mode, and the operation power of the first operation mode is greater than the operation power of the second operation mode.

S203. Determine whether the current temperature is greater than a first threshold.

If not, go to step S204; if yes, go to step S210.

S204: Obtain the first temperature curve of the electric water heater in the historical period.

S205. Determine the curve slope of the first temperature curve according to the first temperature curve.

S206. Determine whether the slope of the curve is less than a second threshold.

If yes, go to step S207; if not, go to step S210.

S207. Obtain the similarity between the first temperature curve and the plurality of preset temperature curves.

S208. Determine whether a target temperature curve exists in the plurality of preset temperature curves, and the similarity between the target temperature curve and the first temperature curve is greater than or equal to the preset similarity.

If the target temperature curve exists, step S210 is performed; if there is no target temperature curve, step S209 is performed.

S209, it is determined that the target operation mode is the same as the current operation mode.

S210. If the current operation mode is the first operation mode, determine that the target operation mode is the second operation mode, and if the current operation mode is the second operation mode, determine that the target operation mode is the power-off mode.

S211. When it is determined that the target operation mode is the power-off mode, generate fault information, and send the fault information to the server, wherein the fault information includes: geographic location information of the electric water heater and abnormal information of the connector.

The implementation process of step S201 and step S202 is the same as that in the foregoing embodiment, and details are not described herein again in this embodiment.

In step S203, a first threshold is obtained, wherein the specific value of the first threshold can be set according to actual needs. The acquired current temperature is compared with the first threshold.

If the current temperature is greater than the first threshold, it may be determined that the temperature at the connector is abnormal, and it may be determined that the connection at the connector is poor, and then step S210 is executed. If the acquired current operation mode of the electric water heater is the first operation mode, the target operation mode is determined to be the second operation mode; if the acquired current operation mode of the electric water heater is the second operation mode, the target operation mode is determined to be off power mode.

If the current temperature is less than or equal to the first threshold, step S204 is executed. In the implementation process of step S204, the first temperature curve of the connector of the electric water heater in the historical period may be determined in real time. The first temperature curve of the connector in the historical period can also be determined every preset time period; in this example, when the current temperature is less than or equal to the first threshold, the first temperature curve can be updated in time, and after the update is obtained the first temperature curve. In this way, it is beneficial to determine the target operation mode according to the first temperature curve and the current operation mode.

In steps S205 and S206, a curve slope of the first temperature curve is determined according to the first temperature curve, and the obtained curve slope is compared with the acquired second threshold value.

If the slope of the curve is greater than or equal to the second threshold, step S210 is executed.

If the slope of the curve is smaller than the second threshold, step S207 is executed. In step S207, optionally, the difference between the first temperature curve and the plurality of preset temperature curves may be determined according to conventional similarity analysis methods such as Euclidean distance, Pearson correlation coefficient, cosine similarity, etc. similarity.

In this example, the preset temperature curve is a temperature curve obtained and stored in advance under multiple abnormal operating conditions; abnormal operating conditions include but are not limited to: power overload, line aging, open circuit, short circuit, and poor connection.

Of course, in other examples, the preset temperature curve can also be the temperature curve in each operation mode of the electric water heater. If the first temperature curve deviates from each preset temperature curve, the target operation mode is determined according to the current operation mode, that is: If the current operation mode of the electric water heater is the first operation mode, the target operation mode is determined as the second operation mode; if the current operation mode of the electric water heater is the second operation mode, the target operation mode is determined as the power-off mode.

In step S208, the obtained multiple degrees of similarity are compared with the preset degrees of similarity respectively. If there is no similarity greater than the preset similarity, it is determined that the temperature at the connector is normal and the connection at the connector is good, and step S209 is executed. If there is a similarity greater than the preset similarity, it is determined that the first temperature curve matches one of the preset temperature curves, and the preset temperature curve is the target temperature curve, then it is determined that the temperature at the connector is abnormal, and it is determined that there is an abnormality power, and step S210 is executed.

In step S209, if the current operation mode of the electric water heater is the first operation mode, the target operation mode is determined to be the first operation mode; if the current operation mode of the electric water heater is the second operation mode, the target operation mode is determined to be the first operation mode. Two operating modes.

In step S210, if the current operation mode of the electric water heater is the first operation mode, it is determined that the target operation mode is the second operation mode. If the current operation mode of the electric water heater is the second operation module type, it is determined that the target operation mode is the power-off mode.

When it is determined that the target operation mode of the electric water heater is the power-off mode, step S211 is performed. After the generated fault information is sent to the server, the server can allocate a nearby maintenance site according to the geographic location information in the fault information, and send the fault information to the maintenance site, so that maintenance personnel can come to repair as soon as possible. Moreover, the server can push maintenance information to the terminal device bound to the electric water heater, so as to notify the user of the maintenance information in time; the maintenance information can include the estimated maintenance time and the contact information of the maintenance personnel; of course, it can also be provided by after-sales service personnel or maintenance personnel. Notify customers by telephone, etc. Users can choose to receive notifications through text messages or phone calls on their terminal devices. The server may be a cabinet-type server or a cloud server.

Optionally, an integrated NTC resistor is set at the connector of the live wire and the neutral wire of the power line; during the normal operation of the electric water heater, the obtained current temperature difference between the connector of the neutral wire and the live wire is within the allowable range. within the range; the difference between the current temperature at the connector of the neutral wire and the live wire exceeds the allowable range, then it is determined that there is a poor connection at one of the connectors of the neutral wire and the live wire; at this time, the fault information can be generated according to the situation sent to the server.

Optionally, when the current temperatures at the connectors of the live wire and the neutral wire have an upward trend, a corresponding first temperature curve can be obtained respectively, so as to determine the current operating power of the electric water heater according to the first temperature curve, so as to facilitate the user to understand. The real power consumption of the electric water heater.

Optionally, the use and scaling of the heating pipe of the water heater can also be determined according to the first temperature curve at the connector and the second temperature curve at the inner tank and in combination with various parameters of the water heater when the water heater is initially used. Exemplarily, the usage and scaling of the heating pipe of the water heater can be calculated by comparing the change curve of the temperature of the connector and the temperature in the tank and combining various parameters of the water heater when the water heater is initially used. For example: the overall resistance of the heating pipe does not change much, but the corresponding heating efficiency decreases when the heating pipe is fouled, and the time for the temperature at the same connector to drop to the set temperature becomes longer. Therefore, according to the current The heating time of the heating pipe and the heating time of the initial use determine the fouling situation of the heating pipe, such as the fouling level.

The working flow of the improved electric water heater control method of the present embodiment is illustrated below with an example.

After being powered on, the electric water heater operates in the first operating mode, and obtains the current temperature T ₁ detected by the NTC at the connector. If T ₁ is greater than the first threshold T ₀ , the electric water heater is controlled to enter the second operating mode with lower operating power; if T ₁ is less than or equal to the first threshold T ₀ , the first temperature curve is acquired, and the first temperature curve is determined. Slope d _T /d _t ; if d _T /d _t is greater than T _n , control the electric water heater to enter the second operating mode with lower operating power; if d _T /d _t is less than or equal to T _n , obtain the first temperature curve similarity with multiple preset temperature curves; if it is determined according to the similarity that a target temperature curve exists in the multiple preset temperature curves, the similarity between the target temperature curve and the first temperature curve is greater than or equal to the preset similarity , the electric water heater is controlled to enter the second operation mode with lower operating power; if it is determined according to the similarity that there is no target temperature curve in the plurality of preset temperature curves, the electric water heater continues to operate in the first operation mode.

The electric water heater operates in the second operating mode and continues to acquire the current temperature T ₁ detected by the NTC at the connector. If T ₁ is greater than the first threshold T ₀ , the electric water heater is controlled to enter the power-off mode; if T ₁ is less than or equal to the first threshold T ₀ , the first temperature curve is acquired, and the slope d _T /d _t of the first temperature curve is determined , if d _T /d _t is greater than T _n , control the electric water heater to enter the power-off mode; if d _T /d _t is less than or equal to T _n , then obtain the similarity between the first temperature curve and multiple preset temperature curves If it is determined according to the similarity that there is a target temperature curve in the multiple preset temperature curves, and the similarity between the target temperature curve and the first temperature curve is greater than or equal to the preset similarity, the electric water heater is controlled to enter the power-off mode, otherwise The electric water heater continues to operate in the second operating mode.

When the electric water heater is controlled to enter the power-off mode, fault information is generated and sent to the cloud server according to the geographical location information and abnormal information of the electric water heater, so that the cloud server can determine the maintenance information and push it to the user terminal device, so as to improve the user experience.

FIG. 6 is a schematic structural diagram of a control device for an electric water heater according to an embodiment of the application. The control device 10 of the electric water heater can be arranged in the electric water heater. Referring to FIG. 6 , the control device 10 of the electric water heater may include: a first acquisition module 11 , a second acquisition module 12 and a processing module 13 , wherein:

The first obtaining module 11 is used to obtain the current temperature of the connector of the electric water heater;

The second obtaining module 12 is configured to obtain the current operation mode of the electric water heater, where the current operation mode is the first operation mode or the second operation mode, and the operation power of the first operation mode is greater than the operation power of the second operation mode;

The processing module 13 is configured to determine the target operation mode of the electric water heater according to the current temperature and the current operation mode, and control the electric water heater to switch to the target operation mode, where the target operation mode is the first operation mode, the second operation mode or the power-off mode.

In a possible implementation manner, the processing module 13 is specifically used for:

When the current temperature is less than or equal to the first threshold value, obtain the first temperature curve of the electric water heater in the historical period, and determine the target operation mode according to the first temperature curve and the current operation mode;

When the current temperature is greater than the first threshold, the target operation mode is determined according to the current operation mode.

In a possible implementation manner, the processing module 13 is specifically used for:

Obtain the curve slope of the first temperature curve;

When the slope of the curve is greater than or equal to the second threshold, determining the target operation mode according to the current operation mode;

When the slope of the curve is smaller than the second threshold, the target operation mode is determined according to the first temperature curve and the plurality of preset temperature curves.

In a possible implementation manner, the processing module 13 is specifically used for:

obtaining the similarity between the first temperature curve and a plurality of preset temperature curves;

According to the similarity between the first temperature curve and the multiple preset temperature curves, it is determined whether there is a target temperature curve in the multiple preset temperature curves, and the similarity between the target temperature curve and the first temperature curve is greater than or equal to the preset temperature curve similarity;

When a target temperature curve exists in the plurality of preset temperature curves, the target operation mode is determined according to the current operation mode;

When there is no target temperature curve among the plurality of preset temperature curves, it is determined that the target operation mode is the same as the current operation mode.

In a possible implementation manner, the processing module 13 is specifically used for:

When the current operation mode is the first operation mode, determining that the target operation mode is the second operation mode;

When the current operation mode is the second operation mode, it is determined that the target operation mode is the power-off mode.

In a possible implementation manner, a thermistor is integrated at the connector; the first acquisition module 11 is specifically used for:

Get the resistance of the thermistor;

Determine the current temperature according to the resistance of the thermistor.

In a possible implementation manner, the processing module 30 is further configured to:

Generate fault information and send fault information to the server;

The fault information includes: geographic location information of the electric water heater and abnormal information of the connector.

The control device for an electric water heater provided by the embodiments of the present application can implement the technical solutions shown in the above method embodiments, and the principles and beneficial effects thereof are similar, which will not be repeated here.

FIG. 7 is a schematic diagram of a hardware structure of a control device of an electric water heater according to an embodiment of the application. Referring to FIG. 7 , the control device 20 of the electric water heater may include: a processor 21 and a memory 22, wherein the processor 21 and the memory 22 can communicate; exemplarily, the processor 21 and the memory 22 communicate through a communication bus 23, and the memory 22 is used to store program instructions, and the processor 21 is used to call the program instructions in the memory to execute the electric water heater control method shown in any of the above method embodiments.

Optionally, the control device 20 of the electric water heater may further include a communication interface, and the communication interface may include a transmitter and/or a receiver.

Optionally, the above-mentioned processor may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC) )Wait. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

The embodiment of the present application provides an electric water heater, and the electric water heater includes the control device of the electric water heater as shown in FIG. 7 .

The embodiments of the present application provide a readable storage medium, on which a computer program is stored; the computer program is used to implement the control method for an electric water heater according to any of the foregoing embodiments.

An embodiment of the present application provides a computer program product, where the computer program product includes an instruction, when the instruction is executed, the computer is made to execute the above-mentioned control method of an electric water heater.

All or part of the steps for implementing the above method embodiments may be completed by program instructions related to hardware. The aforementioned program can be stored in a readable memory. When the program is executed, the steps including the above method embodiments are executed; and the aforementioned memory (storage medium) includes: read-only memory (English: read-only memory, abbreviation: ROM), RAM, flash memory, hard disk, Solid state drive, magnetic tape (English: magnetic tape), floppy disk (English: floppydisk), optical disc (English: optical disc) and any combination thereof.

The embodiments of the present application are described with reference to flowcharts and/or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processing unit of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processing unit of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

In this application, the term "comprising" and its variants may mean non-limiting inclusion; the term "or" and its variants may mean "and/or". The terms "first", "second" and the like in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. In this application, "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects are an "or" relationship.

Claims (10)

1. A control method for an electric water heater, comprising: Get the current temperature of the connector of the electric water heater; acquiring a current operation mode of the electric water heater, where the current operation mode is a first operation mode or a second operation mode, and the operation power of the first operation mode is greater than the operation power of the second operation mode; According to the current temperature and the current operation mode, a target operation mode of the electric water heater is determined, and the electric water heater is controlled to switch to the target operation mode, where the target operation mode is the first operation mode, the the second operating mode or power-off mode. 2 . The method for controlling an electric water heater according to claim 1 , wherein the determining the target operation mode of the electric water heater according to the current temperature and the current operation mode comprises: 2 . If the current temperature is less than or equal to a first threshold, acquiring a first temperature curve of the electric water heater within a historical period, and determining the target operation mode according to the first temperature curve and the current operation mode; If the current temperature is greater than the first threshold, the target operating mode is determined according to the current operating mode. 3. The method for controlling an electric water heater according to claim 2, wherein the determining the target operation mode according to the first temperature curve and the current operation mode comprises: obtaining the curve slope of the first temperature curve; If the slope of the curve is greater than or equal to a second threshold, determining the target operating mode according to the current operating mode; If the slope of the curve is smaller than the second threshold, the target operation mode is determined according to the first temperature curve and a plurality of preset temperature curves. 4. The method for controlling an electric water heater according to claim 3, wherein the determining the target operation mode according to the first temperature curve and a plurality of preset temperature curves comprises: obtaining the similarity between the first temperature curve and the plurality of preset temperature curves; According to the similarity between the first temperature curve and the plurality of preset temperature curves, it is determined whether there is a target temperature curve in the plurality of preset temperature curves, the target temperature curve and the first temperature curve The similarity between them is greater than or equal to the preset similarity; If so, determining the target operation mode according to the current operation mode; If not, it is determined that the target operating mode is the same as the current operating mode. 5. The method for controlling an electric water heater according to any one of claims 2-4, wherein the determining the target operation mode according to the current operation mode comprises: If the current operation mode is the first operation mode, determining that the target operation mode is the second operation mode; If the current operation mode is the second operation mode, it is determined that the target operation mode is the power-off mode. 6. The method for controlling an electric water heater according to any one of claims 1-4, wherein a thermistor is integrated at the connector; obtaining the current temperature of the connector of the electric water heater, comprising: Obtain the resistance value of the thermistor; The current temperature is determined according to the resistance value of the thermistor. 7. The control method of an electric water heater according to any one of claims 1-4, wherein if it is determined that the target operation mode of the electric water heater is the power-off mode, the control method further comprises: generating fault information, and sending the fault information to the server; Wherein, the fault information includes: geographic location information of the electric water heater and abnormal information of the connector. 8. A control device for an electric water heater, comprising: a first acquisition module, used to acquire the current temperature of the connector of the electric water heater; The second obtaining module is configured to obtain the current operation mode of the electric water heater, the current operation mode is the first operation mode or the second operation mode, and the operation power of the first operation mode is greater than that of the second operation mode. operating power; a processing module, configured to determine a target operation mode of the electric water heater according to the current temperature and the current operation mode, and control the electric water heater to switch to the target operation mode, where the target operation mode is the first an operating mode, the second operating mode, or a power-down mode. 9. A control device for an electric water heater, comprising: a processor and a memory; The memory is used to store computer programs; The processor is configured to execute the computer program stored in the memory to realize the control method of the electric water heater according to any one of claims 1 to 7. 10. A computer program product, comprising a computer program, characterized in that, when the computer program is executed by a processor, the control method for an electric water heater according to any one of claims 1 to 7 is implemented.

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