A control method and device of a water purifier, an electronic device, and a storage medium

Abstract

The application discloses a control method and device of a water purifier, electronic equipment and a storage medium, wherein the control method can be applied to the water purifier, the water purifier comprises a preheating container, the preheating container is connected with a water inlet pipeline, a water outlet pipeline and a drain pipeline respectively, the water outlet pipeline is used for being connected with a water outlet device, and a backflow pipeline is arranged between the preheating container and the water outlet pipeline; the method comprises the following steps: in response to a hot water selection signal, water is added to the preheating container based on the water inlet pipeline, and the preheating container is heated; in response to a water taking signal, water flow of the preheating container is controlled to flow to the water outlet pipeline; the water outlet pipeline is heated based on a target water outlet temperature, the water outlet pipeline is controlled to be conducted until the water outlet device stops water outlet; and the backflow pipeline and the drain pipeline are controlled to be conducted, so that water of the water outlet pipeline and water of the preheating container are discharged through the drain pipeline. The application can ensure that a user obtains fresh water every time, and can maximize the water outlet flow of hot water and ensure that the initial water outlet temperature reaches the target water outlet temperature set by the user.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen equipment, and in particular to a control method and device for a water purifier, an electronic device, and a storage medium. BACKGROUND

[0002] A water purifier is a water treatment device that performs deep filtration and purification treatment on water quality according to the use requirements of the water. The water purified by a household water purifier can be directly drunk. Due to the high demand of users for hot drinking water, instant drinking water machines and water purifiers are gradually widely used. The mainstream instant drinking water machines on the market generally use a large-power heater of 3000 watts or more to achieve instant heating effect, and the water volume can reach 22 liters per hour. However, the first cup of water (about 200 milliliters) generally only reaches about 50 degrees Celsius, which cannot meet the customer's use requirements. In addition, due to the insufficient heating efficiency, the hot water outflow is small.

[0003] Therefore, an instant water purifier with a water storage structure appears. The water storage structure is used for water storage and heat preservation. For example, if the user does not take high-temperature water or boiling water for a long time, the water in the water storage structure will not be fresh, or the water will be repeatedly boiled and heated. In addition, due to the heat preservation requirement, the power consumption is high. SUMMARY

[0004] To solve the problems in the prior art, the embodiments of the present application provide a control method and device for a water purifier, an electronic device, and a storage medium. The technical solution is as follows:

[0005] In one aspect, a control method for a water purifier is provided. The water purifier includes a preheating container, a first heating device is arranged in the preheating container, the preheating container is connected with a water inlet pipeline, a water outlet pipeline, and a drain pipeline, the water inlet pipeline is used to communicate the preheating container with a water supply device, the water outlet pipeline is used to communicate the preheating container with a water outlet device, a second heating device is arranged on the water outlet pipeline, and a backflow pipeline is arranged between the water outlet pipeline and the preheating container. The method includes the following steps.

[0006] In response to a hot water selection signal, the water inlet pipeline is controlled to be turned on, a first acting force is applied to water in the water supply device through the water inlet pipeline to make the water in the water supply device flow to the preheating container.

[0007] The first heating device is used to heat the water in the preheating container.

[0008] In response to a water taking signal, a second acting force is applied to the water in the preheating container through the water outlet pipeline to make the water in the preheating container flow to the water outlet pipeline. The water taking signal indicates a target water outlet temperature.

[0009] heating water flowing through the second heating device via the water outlet pipeline based on the second heating device and the target water outlet temperature, and controlling the water outlet pipeline to be conducted so that the water outlet device discharges water until the water outlet device stops discharging water;

[0010] controlling the backflow pipeline and the drainage pipeline to be conducted so that water in the water outlet pipeline flows into the preheating container via the backflow pipeline and is discharged via the drainage pipeline together with water in the preheating container

[0011] In another aspect, a control device of a water purifier is provided, the water purifier comprising a preheating container, the preheating container being provided with a first heating device, the preheating container being connected with a water inlet pipeline, a water outlet pipeline and a drainage pipeline, the water inlet pipeline being used to communicate the preheating container with a water supply device, the water outlet pipeline being used to communicate the preheating container with a water outlet device, the water outlet pipeline being provided with a second heating device, the water outlet pipeline being provided with a backflow pipeline between the preheating container; the device comprises:

[0012] a water preheating module, configured to control the water inlet pipeline to be conducted in response to a hot water selection signal, and apply a first force to water in the water supply device via the water inlet pipeline based on the water inlet pipeline so that water in the water supply device flows to the preheating container via the water inlet pipeline;

[0013] and the first heating device heats water in the preheating container;

[0014] a first water taking module, configured to apply a second force to water in the preheating container via the water outlet pipeline based on the water outlet pipeline in response to a water taking signal so that water in the preheating container flows to the water outlet pipeline; the water taking signal indicates a target water outlet temperature;

[0015] a second water taking module, configured to heat water flowing through the second heating device via the water outlet pipeline based on the second heating device and the target water outlet temperature, and control the water outlet pipeline to be conducted so that the water outlet device discharges water until the water outlet device stops discharging water;

[0016] a pipeline drainage module, configured to control the backflow pipeline and the drainage pipeline to be conducted so that water in the water outlet pipeline flows into the preheating container via the backflow pipeline and is discharged via the drainage pipeline together with water in the preheating container.

[0017] In an exemplary embodiment, the water outlet pipeline comprises a first pipeline and a second pipeline, one end of the first pipeline is connected to the water outlet device, the other end of the first pipeline is connected to the second heating device, one end of the second pipeline is connected to the second heating device, and the other end of the second pipeline is connected to the preheating container; the pipeline drainage module comprises:

[0018] a heating stop module configured to turn off the second heating device and stop applying the second force;

[0019] a first drainage module configured to control the backflow pipeline and the drainage pipeline to be turned on, so that the water in the first pipeline flows into the preheating container through the backflow pipeline;

[0020] a first cutoff module configured to control the first pipeline to be cut off;

[0021] a second drainage module configured to apply the second force to the water in the second pipeline to the preheating container, so that the water in the second pipeline flows into the preheating container through the backflow pipeline and is discharged together with the water in the preheating container through the drainage pipeline;

[0022] a second cutoff module configured to stop applying the second force and control the backflow pipeline and the drainage pipeline to be cut off.

[0023] In an exemplary embodiment, the first pipeline is provided with a first temperature sensing device; the first cutoff module comprises:

[0024] a first temperature acquisition module configured to acquire first temperature data; the first temperature data is collected by the first temperature sensing device before the water in the first pipeline flows into the preheating container;

[0025] a first temperature collection module configured to collect second temperature data based on the first temperature sensing device;

[0026] a first temperature difference determination module configured to determine a first temperature difference between the first temperature data and the second temperature data;

[0027] a first pipeline cutoff module configured to, in a case where the first temperature difference is less than a first preset threshold, control the first pipeline to remain in a turned-on state, update the second temperature data, update the first temperature difference, and control the first pipeline to be cut off when the first temperature difference reaches the first preset threshold.

[0028] In an exemplary embodiment, the second pipeline is provided with a second temperature sensing device; the second cutoff module comprises:

[0029] a second temperature acquisition module, configured to acquire fourth temperature data collected by the second temperature sensing device;

[0030] a second temperature acquisition module, configured to acquire fourth temperature data collected by the second temperature sensing device;

[0031] a second temperature difference determination module, configured to determine a second temperature difference between the third temperature data and the fourth temperature data;

[0032] a second pipeline cutoff module, configured to, in a case where the second temperature difference is less than a second preset threshold, keep the second acting force, update the fourth temperature data, update the second temperature difference, and stop applying the second acting force until the second temperature difference reaches the second preset threshold, and control the backflow pipeline and the drain pipeline to be cut off.

[0033] In an exemplary embodiment, the preheating container is provided with a first liquid level detection device and a third temperature sensing device, the distance between the first liquid level detection device and the bottom of the preheating container is greater than the distance between the first heating device and the bottom of the preheating container; and the water preheating module comprises:

[0034] a third temperature acquisition module, configured to, in response to a first liquid level signal output by the first liquid level detection device, acquire fifth temperature data based on the third temperature sensing device; the first liquid level signal indicates that the water level in the preheating container reaches a first preset height;

[0035] a preheating control module, configured to, in a case where the fifth temperature data is lower than a first preset temperature, control the first heating device to enter a working state, heat the water in the preheating container based on the first heating device, and update the fifth temperature data, until the updated fifth temperature data reaches a second preset temperature, and control the first heating device to enter a non-working state; the first preset temperature is less than or equal to the second preset temperature.

[0036] In an exemplary embodiment, the preheating container is provided with a second liquid level detection device, the distance between the second liquid level detection device and the bottom of the preheating container is greater than the distance between the first liquid level detection device and the bottom of the preheating container; and the water preheating module comprises:

[0037] a water adding control module, configured to control the water inlet pipeline to be turned on in response to a second liquid level signal output by the second liquid level detection device, and to apply a first force to water in the water supply device based on the water inlet pipeline, so that the water in the water supply device flows to the preheating container through the water inlet pipeline; the second liquid level signal indicates that the water level in the preheating container is lower than a second preset height; and the second preset height is greater than the first preset height;

[0038] a water adding stop module, configured to stop applying the first force and control the water inlet pipeline to be turned off in response to a third liquid level signal output by the second liquid level detection device; and the third liquid level signal indicates that the water level in the preheating container reaches the second preset height.

[0039] In an exemplary embodiment, the second water taking module comprises:

[0040] a fourth temperature acquisition module, configured to acquire sixth temperature data based on the second temperature sensing device;

[0041] a third temperature difference determination module, configured to determine a third temperature difference between the sixth temperature data and the target outlet water temperature;

[0042] a power determination module, configured to determine a first heating power based on the third temperature difference and the second force;

[0043] a first heating module, configured to control the second heating device to work based on the first heating power;

[0044] a fifth temperature acquisition module, configured to acquire seventh temperature data based on the first temperature sensing device;

[0045] a fourth temperature difference determination module, configured to determine a fourth temperature difference between the seventh temperature data and the target outlet water temperature;

[0046] a power adjustment module, configured to adjust the first heating power based on the fourth temperature difference to obtain a second heating power and a third force matched with the second heating power;

[0047] a second heating module, configured to control the second heating device to work based on the second heating power, and to adjust the second force to the third force.

[0048] In another aspect, an electronic device is provided, comprising a processor and a memory, the memory storing at least one instruction or at least one program, the at least one instruction or the at least one program being loaded and executed by the processor to implement the control method of the water purifier of any one of the above aspects.

[0049] In another aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores at least one instruction or at least one program, which is loaded and executed by a processor to implement the control method of the water purifier according to any one of the above aspects.

[0050] In another aspect, a computer program product or computer program is provided, and the computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the electronic device to perform the control method of the water purifier according to any one of the above aspects.

[0051] The embodiment of the present application controls the water inlet pipeline to be conducted after the user selects hot water, adds water to the preheating container based on the water inlet pipeline, and heats the water in the preheating container; the user sets the target water outlet temperature and other water taking parameters, confirms the water taking, controls the water flow in the preheating container to flow to the water outlet pipeline, heats the water flowing through the water outlet pipeline based on the target water outlet temperature, controls the water outlet pipeline to be conducted, so that the water outlet device discharges water until the water outlet device stops discharging water, and the user completes the water taking; the reflux pipeline and the drain pipeline are controlled to be conducted, so that the water in the water outlet pipeline flows into the preheating container through the reflux pipeline, and is discharged through the drain pipeline together with the water in the preheating container. The present application can empty the residual water in the pipeline and the preheating container after the user completes the water taking, so as to ensure that the user can obtain fresh water every time; therefore, there is no residual water to be quickly heated when the user takes hot water next time, which may cause the hot water discharge flow to be small due to insufficient heating efficiency, or the temperature of the first cup of water to be substandard. In the process of setting the water taking parameters by the user, the preheating container is added with water and preheated, so as to maximize the hot water discharge flow and ensure that the initial water outlet temperature reaches the target water outlet temperature set by the user. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0053] Figure 1 is a structural block diagram of a water purifier provided by the embodiment of the present application;

[0054] Figure 2 is a flowchart of a control method of a water purifier provided by the embodiment of the present application;

[0055] Figure 3is a flowchart of a water adding and preheating method of a water purifier provided by an embodiment of the present application;

[0056] Figure 4 is a flowchart of a water taking and discharging method of a water purifier provided by an embodiment of the present application;

[0057] Figure 5 is a flowchart of a water discharging method of a water purifier provided by an embodiment of the present application;

[0058] Figure 6 is a structural block diagram of a control device of a water purifier provided by an embodiment of the present application;

[0059] Figure 7 is a hardware structural block diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0061] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or server including a series of steps or units does not necessarily have to include only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product, or device.

[0062] It can be understood that in the specific embodiments of the present application, data related to user information is involved, and when the above embodiments of the present application are applied to specific products or technologies, user permission or consent needs to be obtained, and the collection, use, and processing of related data need to comply with relevant laws, regulations, and standards in relevant countries and regions.

[0063] Please refer to Figure 1As shown in FIG. 1, which is a structural block diagram of a water purifier provided by an embodiment of the present application, the water purifier comprises a preheating container, a first heating device is arranged in the preheating container, the preheating container is connected with a water inlet pipeline, a water outlet pipeline and a drain pipeline, the water inlet pipeline is used for connecting the preheating container with a water supply device, the water outlet pipeline is used for connecting the preheating container with a water outlet device, a second heating device is arranged on the water outlet pipeline, and a backflow pipeline is arranged between the water outlet pipeline and the preheating container.

[0064] Specifically, the preheating container is a preheating tank in Figure 1 ; the first heating device can be a heating body, i.e., a preheating heating body in Figure 1 , which is usually arranged at the bottom of the preheating tank; a water inlet valve and a water inlet pump are arranged on the water inlet pipeline, the water inlet valve is used for controlling the conduction or cutoff of the water inlet pipeline, and the water inlet pump is used for applying a first acting force to the water in the water supply device so that the water in the water supply device flows to the preheating container through the water inlet pipeline; a hot water pump, the second heating device and a hot water outlet valve are arranged on the water outlet pipeline, the hot water pump is used for applying a second acting force to the water in the preheating container so that the water in the preheating container flows to the water outlet pipeline, the second heating device can be a heating body, i.e., a quick heating heating body in Figure 1 , and the hot water outlet valve is used for controlling the conduction or cutoff of the water outlet pipeline; a drain valve is arranged on the drain pipeline, and the drain valve is used for controlling the conduction or cutoff of the drain pipeline; a water outlet backflow valve is arranged on the backflow pipeline, and the water outlet backflow valve is used for controlling the conduction or cutoff of the backflow pipeline.

[0065] Please refer to Figure 2 , which is a flowchart of a control method of a water purifier provided by an embodiment of the present application. It should be noted that the present specification provides method operation steps such as embodiments or flowcharts, but more or fewer operation steps can be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one of the many execution orders, and does not represent the only execution order. In actual system or product execution, the method order shown in the embodiments or the drawings can be executed in sequence or in parallel (for example, in a parallel processor or multi-thread processing environment). Specifically, as shown in Figure 2 , the method can comprise:

[0066] S201, in response to a hot water selection signal, controlling the water inlet pipeline to be conducted, applying a first acting force to the water in the water supply device based on the water inlet pipeline so that the water in the water supply device flows to the preheating container through the water inlet pipeline, and heating the water in the preheating container based on the first heating device.

[0067] The hot water selection signal is triggered by a user based on the water purifier. Specifically, the user needs to select hot water or normal temperature water before taking water, and then set the water taking parameters, such as the target water output, and if the user selects hot water, the water taking parameters can also include the target water temperature, and then the user can take water. These selections or settings can be made by the user based on the control panel of the water purifier, and the hot water selection signal is triggered based on the user's selection of hot water.

[0068] The first force is triggered by the user by opening the water inlet pump. Specifically, the water inlet pump can be set as a centrifugal pump.

[0069] Specifically, when the user selects hot water to trigger the hot water selection signal, the water inlet valve is opened to control the water inlet pipeline to be conducted, the water inlet pump is opened to make the water in the water supply device flow to the preheating container through the water inlet pipeline, and the first heating device is opened to heat the water flowing into the preheating container.

[0070] In an exemplary embodiment, the preheating container is provided with a first liquid level detection device and a third temperature sensing device, the distance between the first liquid level detection device and the bottom of the preheating container is greater than the distance between the first heating device and the bottom of the preheating container; the process of heating the water in the preheating container based on the first heating device in the above step S201 can include the following steps:

[0071] In response to the first liquid level signal output by the first liquid level detection device, the third temperature sensing device collects the fifth temperature data;

[0072] In the case where the fifth temperature data is lower than the first preset temperature, the first heating device is controlled to enter the working state, the water in the preheating container is heated based on the first heating device, the fifth temperature data is updated, and when the updated fifth temperature data reaches the second preset temperature, the first heating device is controlled to enter the non-working state.

[0073] The first liquid level signal indicates that the water level in the preheating container reaches a first preset height. Specifically, the first liquid level detection device is arranged on the side wall of the preheating container, and the distance between the first liquid level detection device and the bottom of the preheating container is the first preset height. When the first liquid level detection device detects the water level, the first liquid level signal is output.

[0074] In a specific implementation, the first heating device is arranged at the bottom of the preheating container, and the first liquid level detection device is higher than the first heating device. For example, the first liquid level detection device is 2 cm higher than the first heating device, which ensures that there is water when the first heating device is working, and prevents dry burning.

[0075] The third temperature sensing device is used to detect the water temperature in the preheating container.

[0076] The fifth temperature data indicates the current temperature of the water in the preheating container.

[0077] wherein the first preset temperature is less than or equal to the second preset temperature. In specific implementation, the first preset temperature and the second preset temperature are usually less than the target outlet water temperature. In specific implementation, the second preset temperature can be set to be 2 degrees Celsius higher than the first preset temperature.

[0078] In specific implementation, the reference temperature is the first preset temperature. Figure 3 Fig. 1 shows a flowchart of a water adding preheating method of a water purifier provided by an embodiment of the present application. In the figure, the unlocking operation is an operation of triggering a hot water selection signal by a user. The first liquid level detection device can be a probe, i.e., the first liquid level probe in the figure. The third temperature sensing device can be a temperature sensor, i.e., the preheating tank temperature sensor in the figure. After the user selects hot water, the water inlet pump is turned on to add water to the preheating container. When the first liquid level detection device detects the liquid level, the temperature data collected by the third temperature sensing device, i.e., the fifth temperature data, is acquired. It is determined whether the fifth temperature data is lower than the first preset temperature. If the fifth temperature data is lower than the first preset temperature, the first heating device is turned on to heat the water in the preheating container. When the temperature data collected by the third temperature sensing device reaches the second preset temperature, the first heating device is turned off. If the fifth temperature data is greater than or equal to the second preset temperature, the first heating device does not need to be turned on.

[0079] As can be seen from the above technical solution of the embodiment of the present application, by arranging the first liquid level detection device and the third temperature sensing device in the preheating container, the distance between the first liquid level detection device and the bottom of the preheating container is greater than the distance between the first heating device and the bottom of the preheating container. When the first liquid level detection device detects the water level, if the temperature data collected by the third temperature sensing device is lower than the first preset temperature, the first heating device is turned on to heat the water in the preheating container. When the temperature data collected by the third temperature sensing device reaches the second temperature data, the first heating device is turned off. This ensures that there is water when the first heating device is working, preventing dry burning. The water in the preheating container is preheated before the user takes water, so as to shorten the heating time of the second heating device during the user's water taking process, thereby maximizing the outlet water flow of hot water and improving the hot water response speed of the water purifier.

[0080] In one exemplary embodiment, the preheating container is provided with a second liquid level detection device, and the distance between the second liquid level detection device and the bottom of the preheating container is greater than the distance between the first liquid level detection device and the bottom of the preheating container. The process of controlling the water inlet pipeline to be conducted in the above step S201 can include the following steps:

[0081] In response to a second liquid level signal output by the second liquid level detection device, the water inlet pipeline is controlled to be turned on, and a first force is applied to the water in the water supply device based on the water inlet pipeline, so that the water in the water supply device flows to the preheating container through the water inlet pipeline.

[0082] In response to a third liquid level signal output by the second liquid level detection device, the application of the first force is stopped, and the water inlet pipeline is controlled to be turned off.

[0083] The second liquid level signal indicates that the water level in the preheating container is lower than a second preset height. Specifically, the second liquid level detection device is arranged on the side wall of the preheating container, and the distance from the bottom of the preheating container is the second preset height. When the second liquid level detection device does not detect the water level, the second liquid level signal is output.

[0084] The second preset height is greater than the first preset height.

[0085] The third liquid level signal indicates that the water level in the preheating container reaches the second preset height. Specifically, when the second liquid level detection device detects the water level, the third liquid level signal is output.

[0086] Specifically, if the water level in the preheating container is lower than the second preset height, the water inlet valve and the water inlet pump are opened in sequence to add water to the preheating container. When the water level in the preheating container reaches the second preset height, the water inlet pump and the water inlet valve are closed in sequence to stop adding water to the preheating container.

[0087] In a specific implementation, reference is made to Figure 3 The second liquid level detection device can be a liquid level probe, i.e., the second liquid level probe in the figure. When the second liquid level probe detects the liquid level, the water inlet pump and the water inlet valve are closed, and the addition of water to the preheating container is stopped.

[0088] Specifically, if the water level in the preheating container reaches the second preset height when the drainage starts, to prevent the water in the preheating container from overflowing during the drainage, the distance between the second liquid level detection device and the top of the preheating container is set based on the total volume of the water outlet pipeline and the backflow pipeline, so as to ensure that when the water level in the preheating container reaches the second preset height, the remaining capacity of the preheating container is greater than the total volume of the water outlet pipeline and the backflow pipeline.

[0089] As can be seen from the above technical solutions of the embodiments of the present application, the embodiments of the present application control the amount of water in the preheating container during the operation of the water purifier to ensure that the water outlet device does not stop water during the user's water taking process.

[0090] S203, in response to the water taking signal, a second force is applied to the water in the preheating container based on the water outlet pipeline, so that the water in the preheating container flows to the water outlet pipeline.

[0091] wherein the water taking signal indicates a target water outlet temperature. Specifically, after the user selects hot water, the user sets water taking parameters, such as the target water outlet temperature, the target water outlet volume, and the like, based on the control panel of the water purifier, and then confirms water taking, triggering the water taking signal. In a specific implementation, the user can confirm water taking through a touch key on the control panel of the water purifier.

[0092] wherein the target water outlet temperature is a water temperature required by the user and set by the user through the water purifier.

[0093] wherein the second force is triggered by the user by opening the hot water pump. Specifically, the hot water pump can be set as a centrifugal pump.

[0094] Specifically, when the water taking signal is triggered by confirming water taking, the hot water pump is opened, so that the water in the preheating container flows to the water outlet pipeline.

[0095] S205, based on the second heating device and the target water outlet temperature, heating the water flowing through the second heating device through the water outlet pipeline, controlling the water outlet pipeline to be conducted, so that the water outlet device outlets water until the water outlet device stops outletting water.

[0096] Specifically, by adjusting the duty cycle of the hot water pump to adjust the water flow, and by adjusting the duty cycle of the second heating device to adjust the heating power, the target water outlet temperature is taken as the heating target, the heating speed is improved on the basis of satisfying the heating power being less than the maximum power of the second heating device, the water flow is maximized on the premise of ensuring that the water outlet temperature of the water outlet device reaches the target water outlet temperature, and the response speed of the water outlet device to outlet hot water is ensured.

[0097] Specifically, the water outlet device stopping outletting water can be that the user actively closes the water outlet device, or the water outlet volume of the water outlet device reaches the target water outlet volume set by the user. In a specific implementation, the water outlet device usually refers to a faucet, and the user takes water through the water outlet device.

[0098] In an exemplary embodiment, the process of heating the water flowing through the second heating device through the water outlet pipeline based on the second heating device and the target water outlet temperature in the above step S205 can include the following steps:

[0099] (1) collecting sixth temperature data based on the second temperature sensing device.

[0100] wherein the second temperature sensing device is arranged on the water outlet pipeline on the side of the second heating device close to the preheating container, that is, the temperature sensor Tin in Figure 1

[0101] wherein the sixth temperature data is the temperature of the water in the water outlet pipeline that has not been heated by the second heating device.

[0102] ​(2) determining a third temperature difference between the sixth temperature data and the target outlet water temperature.

[0103] The third temperature difference is compensated by the second heating device.

[0104] (3) determining a first heating power based on the third temperature difference and a second acting force.

[0105] The second acting force corresponds to a duty cycle of the hot water pump, i.e., a water flow in the outlet pipeline.

[0106] The first heating power is less than a maximum power of the second heating device.

[0107] In a specific implementation, the first heating power can be calculated by the following formula:

[0108] Heating power (kW) = temperature difference (K) * flow (kg / min) * 4.2 / 60 (1)

[0109] The unit of the heating power is kilowatt, the unit of the temperature difference is Kelvin, the unit of the flow is kilogram per minute, and 4.2 is a coefficient value. The temperature difference can refer to the third temperature difference or the fourth temperature difference. Specifically, the target outlet water temperature is the heating target. On the premise of ensuring that the outlet water temperature of the outlet device reaches the target outlet water temperature, the flow is maximized to improve the heating speed on the premise that the heating power is less than the maximum power of the second heating device, thereby ensuring the response speed of the outlet device flowing out hot water.

[0110] (4) controlling the second heating device to work based on the first heating power.

[0111] Specifically, the heating power of the second heating device is adjusted to the first heating power by adjusting the duty cycle of the second heating device.

[0112] (5) collecting seventh temperature data based on the first temperature sensor device.

[0113] The first temperature sensor device is arranged on the outlet pipeline away from the preheating container on the side of the second heating device, i.e., the temperature sensor Tout in the outlet pipeline. Figure 1

[0114] The seventh temperature data is the temperature of the water heated by the second heating device in the outlet pipeline.

[0115] (6) determining a fourth temperature difference between the seventh temperature data and the target outlet water temperature.

[0116] The fourth temperature difference indicates that the second heating device is insufficient.

[0117] ​(7) Adjusting the first heating power based on the fourth temperature difference to obtain a second heating power and a third force matched with the second heating power.

[0118] The third force corresponds to a duty cycle of the hot water pump, i.e., a water flow in the water outlet pipeline.

[0119] The second heating power is less than a maximum power of the second heating device. In a specific implementation, the second heating power is usually greater than the first heating power.

[0120] In a specific implementation, the reference Figure 4 is a flowchart of a water taking and discharging method of a water purifier provided by the embodiment. When a user triggers a water taking signal by pressing a hot water taking key, the hot water pump is turned on, the sixth temperature data T1 collected by the second temperature sensor is read, the seventh temperature data T2 collected by the first temperature sensor is read, the second heating device is turned on, and the duty cycle of the second heating device and the duty cycle of the hot water pump are adjusted by a PID (Proportion Integral Differential) control algorithm to adjust the first heating power and the flow, so as to take the target outlet water temperature as a heating target, increase the heating power on the premise that the heating power is less than the maximum power of the second heating device to obtain the second heating power, increase the heating speed, shorten the heating time, maximize the water flow on the premise that the outlet water temperature of the outlet device reaches the target outlet water temperature, determine the corresponding third force, and ensure the response speed of the hot water flowing out of the outlet device.

[0121] (8) Controlling the second heating device to work based on the second heating power, and adjusting the second force to the third force.

[0122] Specifically, the third force is applied to the water in the preheating container by the water outlet pipeline, so that the water in the preheating container flows to the water outlet pipeline.

[0123] As can be seen from the above technical solutions of the embodiment, the heating power of the second heating device and the water flow of the water outlet pipeline are adjusted, the target outlet water temperature is taken as a heating target, the heating speed is increased on the premise that the heating power is less than the maximum power of the second heating device, the water flow is maximized on the premise that the outlet water temperature of the outlet device reaches the target outlet water temperature, and the response speed of the hot water flowing out of the outlet device is improved.

[0124] S207, the control backflow pipeline and the drainage pipeline are conducted to make the water in the water outlet pipeline flow into the preheating container through the backflow pipeline, and the water in the preheating container and the water in the preheating container flow out through the drainage pipeline.

[0125] Specifically, the backflow valve is opened to make the backflow pipeline conductive, and the drain valve is opened to make the drain pipeline conductive; the water in the outlet pipeline is partially backflowed into the preheating container by gravity and partially backflowed into the preheating container by the action of the hot water pump.

[0126] As can be seen from the above technical solutions of the embodiments of the present application, the embodiments of the present application can ensure that the user obtains fresh water each time by emptying the residual water in the pipeline and the preheating container after the user finishes taking water; thus, the user does not need to quickly heat the residual water when taking hot water next time, which may cause the problem of small hot water outlet flow due to insufficient heating efficiency or the problem of substandard temperature of the first cup of water, the embodiments of the present application add water to the preheating container and preheat the preheating container in the process in which the user sets the water taking parameters, thereby maximizing the outlet flow of hot water and ensuring that the initial outlet temperature reaches the target outlet temperature set by the user.

[0127] In one exemplary embodiment, referring to Figure 1 , the outlet pipeline includes a first pipeline and a second pipeline, one end of the first pipeline is used to connect the outlet device, the other end of the first pipeline is connected to the second heating device, one end of the second pipeline is connected to the second heating device, the other end of the second pipeline is connected to the preheating container, the hot water outlet valve is arranged in the first pipeline, and the hot water pump is arranged in the second pipeline; as shown in Figure 5 , it is a flowchart of a water draining method of a water purifier provided by the embodiments of the present application, and the step S207 can include the following steps:

[0128] S501, the second heating device is closed, and the second action force is stopped.

[0129] Specifically, after the user finishes taking water, the second heating device and the hot water pump are closed.

[0130] S503, the backflow pipeline and the drain pipeline are controlled to be conductive, so that the water in the first pipeline flows into the preheating container through the backflow pipeline.

[0131] Specifically, the water in the first pipeline backflows into the preheating container along the backflow pipeline under the action of gravity.

[0132] S505, the first pipeline is controlled to be cut off.

[0133] Specifically, after the water in the first pipeline is emptied, the hot water outlet valve is closed.

[0134] In one exemplary embodiment, a first temperature sensing device is arranged on the first pipeline; referring to Figure 4 , it is a flowchart of a water taking and draining method of a water purifier provided by the embodiments of the present application, and the step S505 can include the following steps:

[0135] obtaining first temperature data;

[0136] collecting second temperature data based on the first temperature sensor;

[0137] determining a first temperature difference between the first temperature data and the second temperature data;

[0138] in a case where the first temperature difference is less than a first preset threshold, controlling the first pipeline to keep a conducting state, updating the second temperature data, updating the first temperature difference, and until the first temperature difference reaches the first preset threshold, controlling the first pipeline to be cut off.

[0139] wherein the first temperature data is collected by the first temperature sensor before the water in the first pipeline flows into the preheating container, denoted as Tout0. Specifically, after the user finishes taking water, the second heating device and the hot water pump are turned off, and the first temperature data Tout0 is collected based on the first temperature sensor.

[0140] wherein the second temperature data is collected by the first temperature sensor during the process of draining the first pipeline, denoted as Tout1. Specifically, the backflow valve and the drain valve are opened, and the second temperature data Tout1 is collected based on the first temperature sensor.

[0141] Specifically, after the hot water backflows, the temperature in the first pipeline is affected by the air temperature, and the detection value of the first temperature sensor will decrease, so the first temperature difference will be generated.

[0142] wherein the first preset threshold is a temperature threshold. Specifically, in a case where the first temperature difference is less than the first preset threshold, it is considered that the water in the first pipeline has not been drained, and the first pipeline continues to be drained until the first temperature difference is greater than or equal to the first preset threshold, it is considered that the water in the first pipeline has been drained, and the hot water outlet valve is closed. In a specific implementation, considering the delay of gravity backflow, when the first temperature difference is greater than or equal to the first preset threshold, the hot water outlet valve is closed after a few seconds.

[0143] As can be seen from the above technical solutions of the embodiments of the present application, the embodiments of the present application drain the water in the first pipeline by means of gravity, confirm whether the first pipeline is drained according to the temperature change in the first pipeline after the hot water backflows, and close the hot water outlet valve after confirming the drainage, so as to facilitate subsequent drainage of other pipelines.

[0144] S507, based on the second pipeline applying a second acting force to the water in the preheating container, so that the water in the second pipeline flows into the preheating container through the backflow pipeline, and is drained together with the water in the preheating container through the drain pipeline.

[0145] Specifically, the hot water pump is opened, the second pipeline, the backflow pipeline and the preheating container form a loop, part of the water flows to the drain pipeline and part of the water flows to the outlet pipeline, therefore the outlet pipeline is connected to the side wall of the preheating container close to the bottom and the drain pipeline is connected to the bottom of the preheating container, so that the connection between the outlet pipeline and the preheating container is higher than the connection between the drain pipeline and the preheating container; during the drainage process, as the amount of water to be drained gradually decreases, the water to be drained finally flows to the drain pipeline.

[0146] S509, stop applying the second force, control the backflow pipeline and the drain pipeline to be cut off.

[0147] Specifically, after the drainage is completed, the hot water pump is closed, the outlet backflow valve and the drain valve are closed.

[0148] As can be seen from the above technical solutions of the embodiments of the present application, the embodiments of the present application drain the water in the first pipeline and the second pipeline into the preheating container respectively by means of gravity and the hot water pump after the user finishes taking water, and drain the water in the preheating container into the drain pipeline, so as to empty the residual water in the pipeline and the preheating container, thereby ensuring that the user gets fresh water each time.

[0149] In one exemplary embodiment, a second temperature sensing device is arranged on the second pipeline; with reference to Figure 4 It shows a flowchart of a water taking and draining method of a water purifier provided by the embodiments of the present application, and the above step S509 can include the following steps:

[0150] Acquire third temperature data collected by the second temperature sensing device;

[0151] Collect fourth temperature data based on the second temperature sensing device;

[0152] Determine a second temperature difference between the third temperature data and the fourth temperature data;

[0153] In the case where the second temperature difference is less than a second preset threshold, the second force is maintained, the fourth temperature data is updated, the second temperature difference is updated, and when the second temperature difference reaches the second preset threshold, the application of the second force is stopped and the backflow pipeline and the drain pipeline are controlled to be cut off.

[0154] The third temperature data is collected by the second temperature sensing device before the water in the second pipeline flows into the preheating container, denoted as Tin0. Specifically, after the drainage of the first pipeline is completed, the hot water outlet valve is closed, and the third temperature data Tin0 is collected based on the second temperature sensing device.

[0155] The fourth temperature data is collected by the second temperature sensing device in the process of the water in the second pipeline flowing into the preheating container, denoted as Tin1. Specifically, the hot water pump is opened, and the fourth temperature data Tin1 is collected based on the second temperature sensing device.

[0156] Specifically, since the hot water flows back, the temperature in the second pipeline is affected by the air temperature, the detection value of the second temperature sensing device decreases, and thus the second temperature difference is generated.

[0157] In the specific implementation, considering the time delay of pipeline backflow, when the second temperature difference is greater than or equal to the second preset threshold, the hot water pump, the water outlet backflow valve and the drain valve are closed after a delay of several seconds.

[0158] According to the above technical solutions of the embodiments of the present application, the embodiments of the present application empty the water in the second pipeline with the help of the hot water pump, confirm whether the second pipeline is emptied according to the temperature change in the second pipeline after the hot water flows back, close the hot water pump, the water outlet backflow valve and the drain valve after confirming the emptying, complete the emptying of the pipeline and the preheating container, and thus ensure that the user obtains fresh water each time.

[0159] Corresponding to the control method of the water purifier provided in the above several embodiments, the embodiments of the present application also provide a control device of a water purifier. Since the control device of the water purifier provided in the embodiments of the present application corresponds to the control method of the water purifier provided in the above several embodiments, the implementation manners of the control method of the water purifier are also applicable to the control device of the water purifier provided in the embodiments of the present application, which will not be described in detail in the embodiments of the present application.

[0160] Please refer to Figure 6 which is a structure schematic diagram of a control device of a water purifier provided in the embodiments of the present application. The device has the function of implementing the control method of the water purifier in the above method embodiments. The function can be realized by hardware, or the corresponding software can be executed by hardware. The water purifier includes a preheating container, the preheating container is provided with a first heating device, the preheating container is connected with a water inlet pipeline, a water outlet pipeline and a drain pipeline, the water inlet pipeline is used to communicate the preheating container with a water supply device, the water outlet pipeline is used to communicate the preheating container with a water outlet device, the water outlet pipeline is provided with a second heating device, and a backflow pipeline is arranged between the water outlet pipeline and the preheating container; as Figure 6 shown, the device can include:

[0161] The water adding and preheating module 610 is configured to, in response to a hot water selection signal, control the water inlet pipeline to be conducted, apply a first acting force to the water in the water supply device based on the water inlet pipeline, so that the water in the water supply device flows to the preheating container through the water inlet pipeline.

[0162] and the first heating device heats water in the preheating container;

[0163] The first water taking module 620 is configured to apply a second force to the water in the preheating container based on the water outlet pipeline to make the water in the preheating container flow to the water outlet pipeline in response to a water taking signal; the water taking signal indicates a target outlet water temperature;

[0164] The second water taking module 630 is configured to heat the water flowing through the second heating device based on the second heating device and the target outlet water temperature, and control the water outlet pipeline to be conducted to make the water outlet device outlet water until the water outlet device stops outletting water.

[0165] The pipeline drainage module 640 is configured to control the backflow pipeline and the drainage pipeline to be conducted to make the water in the water outlet pipeline flow into the preheating container through the backflow pipeline and be drained through the drainage pipeline together with the water in the preheating container.

[0166] In an exemplary embodiment, the water outlet pipeline comprises a first pipeline and a second pipeline, one end of the first pipeline is configured to be connected to the water outlet device, the other end of the first pipeline is connected to the second heating device, one end of the second pipeline is connected to the second heating device, and the other end of the second pipeline is connected to the preheating container; the pipeline drainage module comprises:

[0167] The heating stop module is configured to close the second heating device and stop applying the second force;

[0168] The first drainage module is configured to control the backflow pipeline and the drainage pipeline to be conducted to make the water in the first pipeline flow into the preheating container through the backflow pipeline;

[0169] The first cutoff module is configured to control the first pipeline to be cut off;

[0170] The second drainage module is configured to apply the second force to the water in the preheating container based on the second pipeline to make the water in the second pipeline flow into the preheating container through the backflow pipeline and be drained through the drainage pipeline together with the water in the preheating container;

[0171] The second cutoff module is configured to stop applying the second force and control the backflow pipeline and the drainage pipeline to be cut off.

[0172] In an exemplary embodiment, the first pipeline is provided with a first temperature sensing device; the first cutoff module comprises:

[0173] The first temperature acquisition module is configured to acquire first temperature data; the first temperature data is collected by the first temperature sensing device before the water in the first pipeline flows into the preheating container;

[0174] The first temperature acquisition module is configured to acquire first temperature data; the first temperature data is collected by the first temperature sensing device before the water in the first pipeline flows into the preheating container;

[0175] The first temperature difference determining module is configured to determine a first temperature difference between the first temperature data and the second temperature data.

[0176] The first pipeline cutoff module is configured to, in a case where the first temperature difference is less than a first preset threshold, control the first pipeline to remain in a conducting state, update the second temperature data, and update the first temperature difference, until the first temperature difference reaches the first preset threshold, and then control the first pipeline to be cutoff.

[0177] In an exemplary embodiment, the second pipeline is provided with a second temperature sensing device; and the second cutoff module comprises:

[0178] The second temperature obtaining module is configured to obtain third temperature data collected by the second temperature sensing device; the third temperature data is collected by the second temperature sensing device before water flows into the preheating container in the second pipeline.

[0179] The second temperature collecting module is configured to collect fourth temperature data based on the second temperature sensing device.

[0180] The second temperature difference determining module is configured to determine a second temperature difference between the third temperature data and the fourth temperature data.

[0181] The second pipeline cutoff module is configured to, in a case where the second temperature difference is less than a second preset threshold, maintain the second acting force, update the fourth temperature data, and update the second temperature difference, until the second temperature difference reaches the second preset threshold, and then stop applying the second acting force and control the backflow pipeline and the drainage pipeline to be cutoff.

[0182] In an exemplary embodiment, the preheating container is provided with a first liquid level detecting device and a third temperature sensing device, the distance between the first liquid level detecting device and the bottom of the preheating container is greater than the distance between the first heating device and the bottom of the preheating container; and the water preheating module comprises:

[0183] The third temperature collecting module is configured to, in response to a first liquid level signal output by the first liquid level detecting device, collect fifth temperature data based on the third temperature sensing device; the first liquid level signal indicates that the water level in the preheating container reaches a first preset height.

[0184] The preheating control module is configured to, in a case where the fifth temperature data is lower than a first preset temperature, control the first heating device to enter a working state, heat the water in the preheating container based on the first heating device, update the fifth temperature data, until the updated fifth temperature data reaches a second preset temperature, and then control the first heating device to enter a non-working state; the first preset temperature is less than or equal to the second preset temperature.

[0185] In an example embodiment, the preheating container is provided with a second liquid level detection device, the distance between the second liquid level detection device and the bottom of the preheating container is greater than the distance between the first liquid level detection device and the bottom of the preheating container; the water adding preheating module comprises:

[0186] The water adding control module is configured to control the water inlet pipeline to be turned on in response to a second liquid level signal output by the second liquid level detection device, and to apply a first force to the water in the water supply device based on the water inlet pipeline, so that the water in the water supply device flows to the preheating container through the water inlet pipeline; the second liquid level signal indicates that the water level in the preheating container is lower than a second preset height; the second preset height is greater than the first preset height;

[0187] The water adding stop module is configured to stop applying the first force and to control the water inlet pipeline to be turned off in response to a third liquid level signal output by the second liquid level detection device; the third liquid level signal indicates that the water level in the preheating container reaches the second preset height.

[0188] In an example embodiment, the second water taking module comprises:

[0189] The fourth temperature acquisition module is configured to acquire sixth temperature data based on the second temperature sensing device;

[0190] The third temperature difference determination module is configured to determine a third temperature difference between the sixth temperature data and the target outlet water temperature;

[0191] The power determination module is configured to determine a first heating power based on the third temperature difference and the second force;

[0192] The first heating module is configured to control the second heating device to work based on the first heating power;

[0193] The fifth temperature acquisition module is configured to acquire seventh temperature data based on the first temperature sensing device;

[0194] The fourth temperature difference determination module is configured to determine a fourth temperature difference between the seventh temperature data and the target outlet water temperature;

[0195] The power adjustment module is configured to adjust the first heating power based on the fourth temperature difference to obtain a second heating power and a third force matched with the second heating power;

[0196] The second heating module is configured to control the second heating device to work based on the second heating power and to adjust the second force to the third force.

[0197] It should be noted that the apparatus provided in the above embodiments, in realizing its functions, only divides the above-mentioned various functional modules by way of example, and in actual application, the above-mentioned functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be repeated here.

[0198] The electronic device provided in the embodiments of the present application includes a processor and a memory, and the memory stores at least one instruction or at least one program, which is loaded and executed by the processor to implement the control method of the water purifier provided in any one of the above method embodiments.

[0199] The memory can be used to store software programs and modules, and the processor executes various functional applications and data processing by running the software programs and modules stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs required by functions, etc.; and the data storage area can store data created according to the use of the device, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device. Accordingly, the memory can also include a memory controller to provide access of the processor to the memory.

[0200] The method embodiments provided in the embodiments of the present application can be executed in a computer terminal, a server or a similar computing device, that is, the above-mentioned electronic device can include a computer terminal, a server or a similar computing device. Figure 7 is the hardware structure block diagram of the computer device provided in the embodiments of the present application for running a control method of a water purifier, as Figure 7 shown, the internal structure of the computer device can include but is not limited to a processor, a network interface and a memory. Among them, the processor, the network interface and the memory in the computer device can be connected through a bus or other means, in the embodiments of the present application Figure 7 are taken as examples of connection through a bus.

[0201] The processor (or CPU (Central Processing Unit)) is the computing core and control core of the computer device. The network interface can optionally include a standard wired interface, a wireless interface (such as WI-FI, a mobile communication interface, etc.). The memory is a memory device in the computer device, used to store programs and data. It can be understood that the memory here can be a high-speed RAM memory device, or a non-volatile memory, for example, at least one disk storage device; optionally, it can also be at least one storage device located away from the aforementioned processor. The memory provides a storage space that stores the operating system of the electronic device, which can include but is not limited to: a Windows system (an operating system), a Linux (an operating system), an Android (a mobile operating system) system, an IOS (a mobile operating system) system, etc., and the present application does not limit this; and in the storage space, one or more instructions suitable for being loaded and executed by the processor are also stored, and these instructions can be one or more computer programs (including program codes). In the embodiment of the present application, the processor loads and executes one or more instructions stored in the memory to implement the control method of the water purifier provided by the above method embodiment.

[0202] The embodiment of the present application also provides a computer readable storage medium, which can be arranged in an electronic device to save at least one instruction or at least one program related to a control method of a water purifier. The at least one instruction or the at least one program is loaded and executed by the processor to implement any one of the control methods of the water purifier provided by the above method embodiment.

[0203] Optionally, in the present embodiment, the above-mentioned storage medium can include but is not limited to: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0204] It should be noted that the above-mentioned order of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And the above describes the specific embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be executed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multi-task processing and parallel processing are possible or can be advantageous.

[0205] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments.

[0206] A person of ordinary skill in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or by program instructing relevant hardware to complete, and the program can be stored in a computer readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0207] The above is only the preferred embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control method of a water purifier, characterized by, The water purifier comprises a preheating container, a first heating device is arranged in the preheating container, the preheating container is connected with a water inlet pipeline, a water outlet pipeline and a drain pipeline, the water inlet pipeline is used for connecting the preheating container with a water supply device, the water outlet pipeline is used for connecting the preheating container with a water outlet device, a second heating device is arranged on the water outlet pipeline, and a backflow pipeline is arranged between the water outlet pipeline and the preheating container; the method comprises: in response to a hot water selection signal, controlling the water inlet pipeline to be conducted, applying a first force to water in the water supply device through the water inlet pipeline to make the water in the water supply device flow to the preheating container through the water inlet pipeline; and heating water in the preheating container based on the first heating device; in response to a water taking signal, applying a second force to water in the preheating container through the water outlet pipeline to make the water in the preheating container flow to the water outlet pipeline; the water taking signal indicates a target water outlet temperature; based on the second heating device and the target water outlet temperature, heating water flowing through the second heating device through the water outlet pipeline, controlling the water outlet pipeline to be conducted to make the water outlet device outlet water until the water outlet device stops outletting water; controlling the backflow pipeline and the drain pipeline to be conducted to make water in the water outlet pipeline flow into the preheating container through the backflow pipeline and be discharged through the drain pipeline together with water in the preheating container.

2. The control method of the water purifier according to claim 1, characterized by, The water outlet pipeline comprises a first pipeline and a second pipeline, one end of the first pipeline is used for connecting the water outlet device, the other end of the first pipeline is connected with the second heating device, one end of the second pipeline is connected with the second heating device, and the other end of the second pipeline is connected with the preheating container; The control of the backflow pipeline and the drain pipeline to be conducted to make water in the water outlet pipeline flow into the preheating container through the backflow pipeline and be discharged through the drain pipeline together with water in the preheating container comprises: turning off the second heating device and stopping the application of the second force; controlling the backflow pipeline and the drain pipeline to be conducted to make water in the first pipeline flow into the preheating container through the backflow pipeline; controlling the first pipeline to be cut off; applying the second force to water in the preheating container through the second pipeline to make water in the second pipeline flow into the preheating container through the backflow pipeline and be discharged through the drain pipeline together with water in the preheating container; stopping the application of the second force and controlling the backflow pipeline and the drain pipeline to be cut off.

3. The control method of the water purifier according to claim 2, characterized by, A first temperature sensing device is arranged on the first pipeline; The control of the first pipeline to be cut off comprises: acquiring first temperature data; the first temperature data is collected by the first temperature sensing device before water in the first pipeline flows into the preheating container; acquiring second temperature data based on the first temperature sensing device; determining a first temperature difference between the first temperature data and the second temperature data; In a case that the first temperature difference is less than a first preset threshold, the first pipeline is controlled to keep in a conducting state, the second temperature data is updated, and the first temperature difference is updated until the first temperature difference reaches the first preset threshold, and then the first pipeline is controlled to be turned off.

4. The control method of the water purifier according to claim 3, characterized by, The second pipeline is provided with a second temperature sensing device; and the stopping of the second force and the controlling of the return pipeline and the drainage pipeline to be turned off include: Third temperature data collected by the second temperature sensing device is acquired; the third temperature data is collected by the second temperature sensing device before water in the second pipeline flows into the preheating container; Fourth temperature data collected by the second temperature sensing device is acquired; A second temperature difference between the third temperature data and the fourth temperature data is determined; In a case that the second temperature difference is less than a second preset threshold, the second force is kept, the fourth temperature data is updated, and the second temperature difference is updated until the second temperature difference reaches the second preset threshold, and then the second force is stopped, and the return pipeline and the drainage pipeline are controlled to be turned off.

5. The control method of the water purifier according to claim 1, characterized in that, The preheating container is provided with a first liquid level detection device and a third temperature sensing device, a distance between the first liquid level detection device and a bottom of the preheating container is greater than a distance between the first heating device and the bottom of the preheating container; and the heating of water in the preheating container by the first heating device includes: Fifth temperature data collected by the third temperature sensing device is acquired in response to a first liquid level signal output by the first liquid level detection device; the first liquid level signal indicates that a water level in the preheating container reaches a first preset height; In a case that the fifth temperature data is lower than a first preset temperature, the first heating device is controlled to enter a working state, the water in the preheating container is heated by the first heating device, the fifth temperature data is updated, and then the first heating device is controlled to enter a non-working state when the updated fifth temperature data reaches a second preset temperature; the first preset temperature is less than or equal to the second preset temperature.

6. The control method of the water purifier according to claim 5, characterized in that, The preheating container is provided with a second liquid level detection device, a distance between the second liquid level detection device and the bottom of the preheating container is greater than a distance between the first liquid level detection device and the bottom of the preheating container; The controlling of the water inlet pipeline to be conducted and the applying of the first force by the water inlet pipeline to water in the water supply device so that the water in the water supply device flows to the preheating container through the water inlet pipeline include: The water inlet pipeline is controlled to be conducted and the first force is applied by the water inlet pipeline to water in the water supply device so that the water in the water supply device flows to the preheating container through the water inlet pipeline in response to a second liquid level signal output by the second liquid level detection device; the second liquid level signal indicates that the water level in the preheating container is lower than a second preset height; and the second preset height is greater than the first preset height. In response to a third liquid level signal output by the second liquid level detection device, the first action force is stopped, and the water inlet pipeline is controlled to be cut off; the third liquid level signal indicates that the water level in the preheating container reaches the second preset height.

7. The control method of the water purifier according to claim 4, characterized by, The water flowing through the second heating device via the water outlet pipeline is heated based on the second heating device and the target water outlet temperature, including: The sixth temperature data is collected based on the second temperature sensing device; A third temperature difference between the sixth temperature data and the target water outlet temperature is determined; The first heating power is determined based on the third temperature difference and the second action force; The second heating device is controlled to work based on the first heating power; The seventh temperature data is collected based on the first temperature sensing device; A fourth temperature difference between the seventh temperature data and the target water outlet temperature is determined; The first heating power is adjusted based on the fourth temperature difference to obtain a second heating power and a third action force matched with the second heating power; The second heating device is controlled to work based on the second heating power, and the second action force is adjusted to the third action force.

8. A control device for a water purifier, characterized by comprising: The water purifier includes a preheating container, the preheating container is provided with a first heating device, the preheating container is connected with a water inlet pipeline, a water outlet pipeline and a drain pipeline, the water inlet pipeline is used to communicate the preheating container with a water supply device, the water outlet pipeline is used to communicate the preheating container with a water outlet device, the water outlet pipeline is provided with a second heating device, and a backflow pipeline is arranged between the water outlet pipeline and the preheating container; the device includes: A water adding and preheating module is used to control the water inlet pipeline to be conducted in response to a hot water selection signal, apply a first action force to water in the water supply device based on the water inlet pipeline, so that the water in the water supply device flows to the preheating container via the water inlet pipeline, and heat the water in the preheating container based on the first heating device; A first water taking module is used to apply a second action force to water in the preheating container based on the water outlet pipeline in response to a water taking signal, so that the water in the preheating container flows to the water outlet pipeline; the water taking signal indicates a target water outlet temperature; A second water taking module is used to heat water flowing through the second heating device via the water outlet pipeline based on the second heating device and the target water outlet temperature, control the water outlet pipeline to be conducted, so that the water outlet device discharges water until the water outlet device stops discharging water; A pipeline drainage module is used to control the backflow pipeline and the drain pipeline to be conducted, so that the water in the water outlet pipeline flows into the preheating container via the backflow pipeline, and is discharged together with the water in the preheating container via the drain pipeline. The water purifier includes a processor and a memory, the memory stores at least one instruction or at least one program, the at least one instruction or the at least one program is loaded and executed by the processor to implement the control method of the water purifier in any one of claims 1-7.

9. An electronic device, comprising: ​ 10. A computer readable storage medium, the storage medium having stored therein at least one instruction or at least one piece of program, the at least one instruction or the at least one piece of program being loaded and executed by a processor to implement the control method of the water purifier according to any one of claims 1-7.

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