WO2021004034A1

WO2021004034A1 - Water heater and control method therefor, and computer-readable storage medium

Info

Publication number: WO2021004034A1
Application number: PCT/CN2019/129841
Authority: WO
Inventors: 申勇兵; 谢亚光; 王明
Original assignee: 芜湖美的厨卫电器制造有限公司
Priority date: 2019-07-05
Filing date: 2019-12-30
Publication date: 2021-01-14

Abstract

Disclosed are a water heater control method and a water heater. A heating device (105) is respectively arranged at the bottom and the top of an inner container of the water heater. The control method for the water heater comprises the following steps: acquiring a water temperature, corresponding to the inner container, of a middle part; and when it is determined that the water temperature of the middle part is less than or equal to a set temperature, controlling a heating device (105) at the bottom of the inner container to run.

Description

Water heater and its control method and computer readable storage medium

Related application

This application requires that the application number applied on July 5, 2019 is 201910607830.3 and the name is "water heater and its control method and computer readable storage medium" and the application number applied on July 5, 2019 is 201910608059.1 and the name is "water heater and its control" The priority of the two Chinese patent applications of "Methods and Computer-readable Storage Media", the full texts of the two Chinese patents are hereby incorporated by reference.

Technical field

This application relates to the technical field of water heaters, in particular to a water heater and its control method and computer readable storage medium.

Background technique

At present, the water heater has become a very popular household appliance. Water heaters are favored by people because of their constant water outlet temperature and unlimited installation conditions.

In the exemplary technology, when the user uses the water heater, the heating device on the top of the water heater is activated, so that the temperature of the water output from the water heater can reach the temperature of bathing, but the heating device on the top only heats the water at the top of the inner tank of the water heater If the user takes a long bath or the hot water output from the water heater is large, the temperature of the water output from the water heater will be greatly reduced, and the shower effect of the water heater will be poor.

Technical solutions

The main purpose of this application is to provide a water heater, a control method thereof, and a computer-readable storage medium, so as to solve the problem of poor shower effect of the water heater.

In order to achieve the above objective, the present application provides a water heater control method. The bottom and top of the inner tank of the water heater are respectively provided with heating devices. The control method of the water heater includes the following steps:

Obtaining the middle water temperature of the inner tank;

When it is determined that the middle water temperature is less than or equal to the set temperature, the operation of the heating device at the bottom of the inner tank is controlled.

In order to achieve the above-mentioned object, this application also provides a water heater, the middle of the inner tank of the water heater is provided with a temperature sensor, the water heater further includes a memory, a processor, and is stored in the memory and can run on the processor The control program of the water heater, the temperature sensor is connected with the processor, and the control program of the water heater is executed by the processor to implement the steps of the control method of the water heater as described above.

To achieve the above objective, the present application also provides a computer-readable storage medium that stores a control program for a water heater, and the control program of the water heater is executed by a processor to realize the control of the water heater as described above. The steps of the method.

The water heater and its control method and computer readable storage medium provided in the present application. The water heater obtains the middle water temperature of the inner tank, and the middle water temperature is less than or equal to the set temperature, and controls the operation of the heating device at the bottom of the water heater inner tank; , The water temperature in the inner tank of the water heater decreases sequentially from the bottom to the top. If the water temperature in the middle of the inner tank is less than or equal to the set temperature, it indicates that the water temperature at the top of the inner tank is lower, that is, the outlet temperature of the water heater is lower, and the water heater controls the inner temperature. The heating device at the bottom of the tank operates to heat the water in the tank as a whole, so that when the water flow is large or the user takes a long bath, the temperature of the hot water output by the water heater is higher, and the shower effect of the water heater is good .

Description of the drawings

Figure 1 is a schematic diagram of the hardware structure of a water heater involved in an embodiment of the application;

2 is a schematic flowchart of a first embodiment of a control method for a water heater according to the present application;

Figure 3 is a schematic diagram of the structure of the water heater of the application;

4 is a schematic flowchart of a second embodiment of the control method for a water heater according to the present application;

5 is a schematic flowchart of a third embodiment of a control method for a water heater according to the present application;

Figure 6 is a schematic diagram of temperature curves detected by various temperature sensors when the water heater is discharged according to the application;

Fig. 7 is a schematic flowchart of a fourth embodiment of a method for controlling a water heater according to the present application.

FIG. 8 is a schematic flowchart of a fifth embodiment of a method for controlling a water heater according to the present application;

Figure 9 is another structural schematic diagram of the water heater of the application;

10 is a schematic flowchart of a sixth embodiment of a method for controlling a water heater according to the present application;

Fig. 11 is a schematic flowchart of a seventh embodiment of a method for controlling a water heater according to the present application.

The realization, functional characteristics, and advantages of the purpose of this application will be further described in conjunction with the embodiments and with reference to the drawings.

Implementation of this application

It should be understood that the specific embodiments described here are only used to explain the application, and are not used to limit the application.

The main solution of the embodiment of the present application is to obtain the water temperature in the middle of the inner tank; after determining that the water temperature in the middle is less than or equal to the set temperature, control the operation of the heating device at the bottom of the inner tank.

Since the water heater is discharging water, the water temperature in the inner tank of the water heater decreases sequentially from bottom to top. If the water temperature in the middle of the inner tank is less than or equal to the set temperature, it indicates that the water temperature at the top of the tank is lower, that is, the outlet temperature of the water heater is higher. Small, the water heater controls the operation of the heating device at the bottom of the inner tank to heat the water in the inner tank as a whole, so that the temperature of the hot water output by the water heater is higher when the water flow is large or the user takes a long bath. The shower effect of the water heater is good.

As an implementation scheme, the water heater can be as shown in Figure 1.

The embodiment of the application relates to a water heater. The water heater includes a processor 101, such as a CPU, a memory 102, a communication bus 103, a temperature sensor 104 located in the middle of the inner tank, a bottom heating device 105 located at the bottom of the inner tank, and The top heating device 106 on the top of the liner. Among them, the communication bus 103 is used to implement connection and communication between these components.

The memory 102 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a magnetic disk memory. As shown in FIG. 1, the memory 103, which is a computer storage medium, may include a water heater control program; and the processor 101 may be used to call the water heater control program stored in the memory 102 and perform the following operations:

Obtaining the middle water temperature of the inner tank;

Based on the above hardware architecture of the water heater, an embodiment of the control method of the water heater of the present application is proposed.

Referring to Fig. 2, Fig. 2 is a first embodiment of a control method of a water heater according to the present application. The control method of the water heater includes the following steps:

Step S10, acquiring the water temperature in the middle of the inner tank;

In this embodiment, a middle temperature sensor is provided in the middle of the inner tank of the water heater, and the middle temperature sensor is used to detect the water temperature in the middle of the inner tank. The middle of the liner refers to the position between the bottom of the liner and the top of the liner. Refer to Figure 3, which is a schematic diagram of the structure of the water heater. The height of the inner container of the water heater is H. The inner container from the bottom wall of the inner container to 1/4H from the bottom wall is defined as the bottom of the inner container, and the top wall of the inner container to The liner with a distance of 1/4H from the top wall is defined as the top wall of the liner, and the remaining part is defined as the middle of the liner. Corresponding temperature sensors are provided at the bottom, middle and top of the liner, and the top and Heating devices are respectively arranged at the bottom of the bladder.

The hot water output of the water heater is to input cold water from the inlet pipe at the bottom of the inner tank and simultaneously squeeze out the hot water at the top of the inner tank. Due to the different density of cold water and hot water, the water temperature in the inner tank changes layer by layer. When the inner tank discharges hot water, the water temperature at the bottom of the inner tank first changes, and after a certain period of time, the inner tank changes its temperature. The water temperature at the bottom will be the same as the inlet water temperature, and then after a period of time, the temperature in the middle of the liner will gradually decrease, which in turn causes the temperature at the top of the liner to change. In this embodiment, the bottom of the inner tank and the top of the inner tank of the water heater are respectively provided with heating devices. There is no heating device in the middle of the inner container, and the water temperature in the middle of the inner container is less affected by the heating device. Therefore, it can be judged whether the water heater needs heating according to the water temperature in the middle of the inner container. Step S20, when it is determined that the middle water temperature is less than or equal to the set temperature, the heating device at the bottom of the inner tank is controlled to operate.

In this embodiment, the water heater can compare the water temperature in the middle of the inner tank with the set temperature. If the water temperature in the middle of the inner tank is lower than or equal to the set temperature, it indicates that the water temperature at the top of the water heater may also be lower than the set temperature. For this, control the operation of the heating device at the bottom of the inner tank. The top and bottom of the water heater are equipped with heating devices, but the higher the temperature, the lower the density, that is, the higher temperature water is located on the top of the water heater. If at this time, the heating device at the top of the inner tank is controlled to operate, the hot water at the top will have a lower heating rate for the water in the middle due to its lower density. In this regard, the water heater controls the operation of the heating device at the bottom of the inner tank, so that the heating device heats the water at the bottom of the inner tank. Since the water heated at the bottom will float, the colder water in the middle and the top will be deposited on the bottom and the middle. That is, the heating device at the bottom of the water heater controls the temperature of the water in each part of the inner tank.

When the water temperature in the middle of the inner tank is greater than the set temperature, it indicates that the water temperature at the top of the inner tank is higher, which can meet the user's temperature demand for hot water. At this time, there is no need to control the operation of the heating device at the bottom and the top.

In this embodiment, the water heater determines the set temperature of the water heater according to the user's habitual water consumption corresponding to the current time period, and then compares the set temperature with the relatively stable central water temperature of the inner tank. The central water temperature is less than or equal to the set temperature. At the time of temperature, the heating device at the bottom of the inner tank is activated to heat up the entire water in the inner tank.

In the technical solution provided in this embodiment, the water heater obtains the water temperature in the middle of the inner tank, and the middle water temperature is less than or equal to the set temperature, and controls the operation of the heating device at the bottom of the inner tank of the water heater; The water temperature decreases sequentially from the bottom to the top. If the water temperature in the middle of the inner tank is less than or equal to the set temperature, it indicates that the water temperature at the top of the inner tank is lower, that is, the outlet temperature of the water heater is lower, and the water heater controls the operation of the heating device at the bottom of the inner tank , In order to heat the water in the inner tank as a whole, so that when the water flow is large or the user takes a long bath, the temperature of the hot water output by the water heater is higher, and the shower effect of the water heater is good.

Referring to Fig. 4, Fig. 4 is a second embodiment of a method for controlling a water heater according to the present application. Based on the first embodiment, after the step S10, the method further includes:

Step S30, after determining that the middle water temperature is greater than the set temperature, and determining that the water heater is in a water discharge state, control the operation of the heating device on the top of the inner tank.

In this embodiment, when the water temperature in the middle of the inner tank is greater than the set temperature, the water heater further determines whether the water heater is in a water discharge state. If the water heater is in the discharge state, the water heater is outputting hot water, and the water heater is outputting hot water, cold water will inevitably enter the inner tank. In order to ensure the stable output of the water heater, the water heater can control the operation of the heating device on the top of the inner tank.

The water temperature in the middle of the inner tank is higher than the set temperature, indicating that the water temperature at the top of the inner tank is also higher than the set temperature, and the hot water output by the water heater at this time can meet the user's requirements for water temperature. But as the water heater continues to output hot water, the temperature of the output hot water will gradually decrease. Since the heating rate of the bottom heating device to the top of the inner tank is less than the heating rate of the top heating device to the top of the inner tank, the operation of the top heating device can be controlled to make the hot water temperature output by the water heater higher, which means that the water heater can output satisfactorily Hot water required by the user's temperature.

In the technical solution provided by this embodiment, when the middle water temperature is greater than the set temperature, it is determined whether the user uses the water heater. If the user uses the water heater, the heating device on the top of the inner tank is controlled to operate, so that the hot water output by the water heater has a higher temperature. To meet the user's temperature demand for hot water.

Referring to Fig. 5, Fig. 5 is a third embodiment of a water heater control method according to the present application. Based on the second embodiment, the step S30 includes:

Step S31, determining the temperature decrease amount of the water temperature in the middle of the detection period;

In step S32, it is determined that the temperature decrease corresponding to a plurality of consecutive detection periods is greater than the preset decrease, and it is determined that the water heater is in a water discharge state.

In this embodiment, the water heater is provided with a detection period, and the length of the detection period can be any suitable value. The water heater can obtain the water temperature collected by the temperature sensor in real time, so as to determine the temperature decrease of the water temperature during the detection period. The temperature sensor is not limited to the temperature sensor in the middle of the inner liner, and may be a temperature sensor at the bottom of the inner liner, or a temperature sensor at the top of the inner liner.

The water heater calculates the temperature reduction corresponding to each detection cycle, and each detection cycle is continuous in time. If the temperature reduction corresponding to multiple consecutive detection cycles is greater than the target reduction, the water heater can determine that the water heater is in a water discharge state. That is, the user is using the water heater. At this time, the water heater can collect water parameters of the water heater. The water use parameter may be at least one of the water inlet temperature, the outlet water temperature, the hot water flow rate, the user's water consumption, and the user's bath temperature of the water heater. The water heater can determine the continuous number of the detection period for judging that the water heater is in the water discharge state according to the length of the detection period. For example, when the length of the detection period is long, and the temperature reduction corresponding to two consecutive detection periods is greater than the target reduction, it can be determined that the water heater is in the water discharge state; in the detection period, the time is short, three or three The temperature reduction corresponding to the above detection period is greater than the target reduction, and it can be determined that the water heater is in a water discharge state. Referring to Figure 6, Figure 6 is a schematic diagram of the temperature curve detected by each temperature sensor when the water heater is discharged. Among them, 1 is the water temperature curve detected by the temperature sensor at the bottom of the inner tank, 2 is the water temperature curve detected by the temperature sensor in the middle of the inner tank, and 3 is the inner temperature curve. The water temperature curve detected at the top of the tank, 4 is the outlet water temperature curve, 5 is the inlet water temperature curve, Δt is a detection period, and ΔT is the temperature decrease of the water temperature detected by the bottom temperature sensor in a detection period. From the various water temperature curves in Figure 4, it can be seen that the target reduction of the detection period corresponding to the bottom temperature sensor is the largest, followed by the target reduction of the detection period corresponding to the middle temperature sensor, and the smallest is the detection period corresponding to the top temperature sensor. Target reduction.

The longer the detection period of the water heater is set, the higher the accuracy of judging whether the water heater is in a discharged state, but the longer the detection period will make the water use data collected by the water heater inaccurate. For example, the long detection period will cause the user to use the water heater for a period of time. It will be determined that the user is using the water heater, so that the water heater has not collected the user's water consumption in the previous period of time. When the detection period of the water heater is set to be shorter, the water heater needs to determine whether the temperature decrease corresponding to more consecutive detection periods is greater than the preset decrease, so that the water heater uses a lot of resources for judgment. In this regard, the water heater sets the length of the detection cycle so that the water heater takes into account the water parameters collected more accurately and has fewer resources for judgment.

In the technical solution provided in this embodiment, the water heater obtains the water temperature collected by the temperature sensor, and determines the temperature decrease of the water temperature during the detection period. If the temperature decrease corresponding to multiple consecutive detection periods is greater than the target decrease When the water heater is in the discharge state, it is judged that the water heater has a higher judgment accuracy.

Referring to Fig. 7, Fig. 7 is a fourth embodiment of a water heater control method of this application. Based on the second or third embodiment, after the step S10, the method further includes:

Step S40, after determining that the central water temperature is greater than the set temperature, and determining that the water heater is in a water discharge state, obtain the current maximum hot water output of the water heater and the target water consumption corresponding to the user in the current time period;

Step S50: When it is determined that the maximum hot water output is less than or equal to the target water consumption, the heating device on the top of the inner tank is controlled to operate, or the heating device corresponding to the top and bottom of the inner tank is controlled to operate.

In this embodiment, when the water heater is in the water discharge state, the water heater can determine the current maximum hot water output. The water heater can determine that the user has a corresponding target water consumption during this time period, and the target water consumption represents the amount of hot water required by the user. The water heater judges whether the maximum hot water output is greater than the target water consumption. When the maximum hot water output is less than or equal to the target water consumption, it indicates that the water heater cannot meet the hot water demand of the user in the current time period. For this, the water heater can control the The top heating device on the top of the inner tank with a faster water heating rate is operated, or the heating devices at the bottom of the inner tank and the top of the inner tank are all operated to increase the hot water output so that the water heater can meet the hot water demand of the user as much as possible.

Of course, when the maximum hot water output is greater than the target water consumption, the water heater can operate in the mode of discharging water without heating, that is, each heating device stops operating.

It should be noted that the maximum hot water output can be determined according to the inlet water temperature and the set temperature. Specifically, the water heater divides the inlet water temperature 5°C~40°C into N sections, the outlet water temperature 35°C~45°C is divided into N sections, and the set temperature 35°C~80°C is divided into N sections. When the outlet water temperature is 35°C~45°C, the water heater The output is hot water; the water heater collects the output of the water temperature between 35°C and 45°C, and the output is the maximum hot water output. The water heater constructs a mapping relationship table based on the data relationship between the maximum hot water output, the inlet water temperature and the set temperature. The water heater only needs to find the maximum hot water output in the mapping relationship table according to the inlet water temperature and the set temperature. It should be noted that the set temperature used by the water heater to determine the maximum hot water output refers to the current set temperature corresponding to the current time period of the water heater.

In the technical solution provided by this embodiment, when the water heater is in the water discharge state, the water heater determines the current maximum hot water output to compare the maximum hot water output with the target water consumption, and when the maximum hot water output is When it is less than or equal to the target water consumption, control the top heating device, or control the operation of the top and bottom heating devices, so that the current output of the water heater can meet the user's hot water demand.

Referring to Fig. 8, Fig. 8 is a fifth embodiment of the control method of a water heater according to the present application. The control method of the water heater includes the following steps:

Step S60, the middle of the inner tank of the water heater is not provided with a heating device, and the step of obtaining the middle water temperature corresponding to the inner tank is executed;

The inner tank of the water heater may be provided with top and bottom heating devices, or the inner tank may be provided with top, middle and top heating devices. If the inner tank is provided with top and bottom heating devices, step S10 to step S30 are executed.

In step S70, a heating device is provided in the middle of the inner tank of the water heater, and the water output from the water heater is detected, the first target heating device is determined according to the heating rate of each heating device to the water on the top of the inner tank, and the The first target heating device operates, wherein the first target heating device at least includes a heating device that has the largest heating rate for the water on the top of the inner container.

In this embodiment, multiple heating devices are provided in the inner tank of the water heater, and there may be three heating devices in the inner tank, which are respectively arranged in the middle of the inner tank, the bottom of the inner tank, and the top of the inner tank. 9 is a schematic diagram of the structure of the water heater according to this embodiment. The height of the inner container of the water heater is H. The inner container from the bottom wall of the inner container to 1/4H from the bottom wall is defined as the bottom of the inner container. The liner from the top wall to 1/4H from the top wall is defined as the top wall of the liner, and the remaining part is defined as the middle part of the liner. Corresponding temperature sensors and heating devices are provided at the bottom, middle and top of the liner. The definition of the bottom of the liner, the top of the liner, and the middle of the liner can be adjusted according to the actual size of the liner. In this embodiment, the working principle of the water heater: the hot water output of the water heater is the cold water input from the inlet pipe at the bottom of the inner tank, and the hot water at the top of the inner tank is simultaneously squeezed out; because the density of cold water and hot water are different, the inner tank When the inner tank discharges hot water, the water temperature at the bottom of the tank first changes until the temperature of the tank bottom is the same as the inlet water temperature, and then the cold water flows from the bottom of the tank to the tank in turn. Top diffusion. Due to the different flow of cold water entering the inner tank, the temperature change speed of each layer of the inner tank will be different. Referring to Figure 6, Figure 6 is a schematic diagram of the temperature curve detected by each temperature sensor when the water heater is discharged. Among them, 1 is the water temperature curve detected by the temperature sensor at the bottom of the inner tank, 2 is the water temperature curve detected by the temperature sensor in the middle of the inner tank, and 3 is the inner temperature curve. The water temperature curve detected at the top of the tank, 4 is the outlet water temperature curve, 5 is the inlet water temperature curve, Δt is a detection period, and ΔT is the temperature decrease of the water temperature detected by the bottom temperature sensor in a detection period. It can be seen from Figure 4 that in the initial stage of the water heater discharge, the top water temperature, that is, curve 3, has a small drop. If the heating device is running, the top water temperature will rise, causing the temperature limiter to cut off the heating device, causing the water heater to stop running. The time that the water heater continues to discharge water increases, and the heat input to the top of the inner tank gradually decreases. In the initial stage of the water heater discharge, the bottom heating device at the bottom of the inner tank and the middle heating device at the middle of the inner tank heat up the top water limitedly, and the heat input to the top of the inner tank is less. Therefore, the water heater controls the maximum heating rate of the top water at the initial stage of discharge The top heating device operates to maximize the output of heat at the top of the inner tank.

The above description is based on the fact that the operating power of the three heating devices is not much different. When the power of each heating device of the water heater differs greatly, the heating rate of the top heating device to the top water is not necessarily the largest. Therefore, the water heater It is necessary to determine the heating rate of the top water under the operating power of each heating device, and then determine the first target heating device according to the heating rate of each heating device. The first target heating device at least includes the heating device that has the highest heating rate of the top water.

After the first target heating device is determined, the operation of the first target heating device can be controlled. When the operating power difference of the three heating devices is small, the first target heating device includes at least the top heating device, that is, the top heating device has the largest heating rate for the top water. The first target heating device can be the top heating device and the middle The heating device, or the first target heating device may be a top heating device and a lower heating device.

It should be noted that the water heater is equipped with a safe temperature. When the top water temperature is less than the safe temperature, and the difference between the top water temperature and the safe temperature is large, the top heating device and the middle heating device with a large heating rate for the top water can be controlled When the top water temperature is less than the safe temperature, and the difference between the top water temperature and the safe temperature is small, the top heating device and the lower heating device that control the heating rate of the top water are small The first target heating device operates.

In the technical solution provided in this embodiment, the inner tank of the water heater is provided with multiple heating devices. When it is determined that the water heater stores water, the target heating device is determined according to the heating rate of the water on the top of the inner tank by each heating device to control the target The heating device is running; during the water heater discharge process, the water temperature at the bottom of the inner tank and the middle part of the inner tank decreases greatly, while the water temperature at the top of the tank decreases less. If the heating device operates, the water temperature at the top will be too high. The thermostat cuts off the operation of the heating device, causing the heat input to the inner tank to gradually decrease; and the target heating device includes the heating device that heats up the water at the top of the inner tank at the highest rate. The water heater operates the target heating device to discharge the water in the initial stage More energy is generated, and the duration of the continuous hot water output of the water heater is increased, thereby increasing the amount of hot water provided by the water heater, and the shower effect of the water heater is good. Referring to Fig. 10, Fig. 10 is a sixth embodiment of a water heater control method according to the present application. After the step S70, the method further includes:

Step S80, acquiring the current top water temperature of the inner tank;

Step S90, after determining that the current top water temperature is greater than the safe temperature of the water heater, determine a second target heating device according to the heating rate corresponding to each heating device, wherein the second target heating device is The heating rate of the water at is lower than the heating rate of the water at the top of the inner container by the first target heating device;

Step S100, controlling the first target heating device to stop running, and controlling the second target heating device to run.

In this embodiment, a safety temperature is provided in the water heater, and the safety temperature may be less than the limit temperature corresponding to the temperature limiter. After the first target heating device is running, the water heater obtains the current top water temperature of the inner tank in real time. When the current top water temperature is greater than the safe temperature, it indicates that the top water temperature is too high. If the first target heating device continues to run, the temperature limiter will be cut off The operation of the heating device.

In this regard, the water heater determines the second target heating device, and the heating rate of the top water by the second target heating device is less than the heating rate of the top water by the first target heating device. When the first target heating device includes one of the middle heating device and the bottom heating device and the top heating device, the second target heating device includes the top heating device, or the second target heating device includes the middle heating device, and Bottom heating device.

After the second target heating device is determined, the first target heating device is controlled to stop running, and the second target heating device is controlled to run.

Further, after the second target heating device has been operating for a period of time, if the current top water temperature is greater than the safe temperature, it indicates that the top water temperature is too high. If the second target heating device continues to operate, the temperature limiter will cut off the operation of the heating device. In this regard, the water heater determines a third target heating device, and the heating rate of the top water by the third target heating device is less than the heating rate of the top water by the second target heating device. The second target heating device includes a top heating device, or the second target heating device includes a middle heating device and a bottom heating device, and the third target heating device includes the bottom heating device. After the third target heating device is determined, the second target heating device is controlled to stop running, and the second target heating device is controlled to run. By analogy, after the switching target heating device has been running for a period of time, the current top water temperature is greater than the safe temperature, and the water heater will switch the current target heating device to the next target heating device, and the voiceprint rate of the next target heating device to the top water is less than the current The rate at which the target heating device heats up the water.

In the technical solution provided by this embodiment, the water heater obtains the top water temperature of the inner tank, and when the top water temperature is greater than the safe temperature, it switches to the target heating device with a lower heating rate of the top water to avoid the top water temperature from being too high and causing the temperature limit The heater cuts off the operation of the heating device.

Referring to Fig. 11, Fig. 11 is a seventh embodiment of a water heater control method according to the present application. After the step S70, the method further includes:

Step S110, determine the heat output per unit time of the water heater, and obtain the heating rate of the water in the inner tank; step S120, determine the heat generated by the first target heating device per unit time according to the heating rate;

Step S130, the duration of the heat generated by the first target heating device per unit time is greater than the heat output per unit time of the water heater reaches the target duration, and the second target heating device is determined, wherein the second target heating device outputs The heat is less than the heat output by the first target heating device; the first target heating device is controlled to stop running, and the second target heating device is controlled to run.

In this embodiment, after the first target heating device is running, the water heater can calculate the heat output per unit time of the water heater. Heat output per unit time = (outlet water temperature-inlet water temperature) * flow * specific heat capacity * unit time, where flow refers to the flow of the outlet pipe of the water heater, the inlet water temperature can be detected by the temperature sensor at the bottom of the tank, and the outlet water temperature is According to the temperature sensor on the top of the inner tank, the specific heat capacity is the specific heat capacity of water.

The water heater calculates the amount of heat generated by the first target heating device per unit time. Specifically, the heat generated per unit time = heating rate * top capacity of the inner tank * specific heat capacity * unit time * coefficient, the first target heating device has to heat up the water in the middle and bottom, therefore, the first target heating device contributes to the top The heat is less than the actual heat, that is, the coefficient is less than 1. When the heat generated by the first target heating device per unit time is equal to or less than the heat output per unit time of the water heater, then the top water temperature changes less. At this time, the first target heating device can be controlled to continue to operate. If the heat generated per unit time is greater than the heat output per unit time of the water heater, the top water temperature has a rising trend. If the heat generated by the first target heating device per unit time is greater than the heat output per unit time of the water heater, the duration reaches the target time. The top water temperature is too high. At this time, the first target heating device needs to be switched to the second target heating device. The determination of the second target heating device and the relationship between the second target heating device and the first target heating device refer to the above embodiments. This will not be repeated one by one.

It should be noted that the target duration is determined according to the difference between the heat generated by the first target heating device per unit time and the heat output per unit time of the water heater, and the difference is negatively correlated with the target duration The relationship, that is, the greater the difference, the smaller the target duration.

In the technical solution provided in this embodiment, the water heater calculates the heat generated by the first target heating device per unit time and the heat output per unit time of the water heater to estimate whether the top water temperature of the water heater is too high, so as to take corresponding measures to prevent the top water temperature of the water heater Too high.

In an embodiment, the water heater is provided with a detection period, and the length of the detection period can be any suitable value. The water heater can obtain the water temperature collected by the temperature sensor in real time, so as to determine the temperature decrease of the water temperature during the detection period.

The water heater calculates the temperature reduction corresponding to each detection cycle, and each detection cycle is continuous in time. If the temperature reduction corresponding to multiple consecutive detection cycles is greater than the target reduction, the water heater can determine that the water heater is in a water discharge state. That is, the user is using the water heater. At this time, the water heater can collect water parameters of the water heater. The water use parameter may be at least one of the water inlet temperature, the outlet water temperature, the hot water flow rate, the user's water consumption, and the user's bath temperature of the water heater. The water heater can determine the continuous number of the detection period for judging that the water heater is in the water discharge state according to the length of the detection period. For example, when the length of the detection period is long, and the temperature reduction corresponding to two consecutive detection periods is greater than the target reduction, it can be determined that the water heater is in the water discharge state; in the detection period, the time is short, three or three The temperature decrease corresponding to the above detection period is greater than the first target decrease, and it can be determined that the water heater is in the water discharge state.

The longer the detection period of the water heater is set, the higher the accuracy of judging whether the water heater is in a discharged state, but the longer the detection period will make the water use data collected by the water heater inaccurate. For example, the long detection period will cause the user to use the water heater for a period of time. It will be determined that the user is using the water heater, so that the water heater has not collected the user's water consumption in the previous period of time. When the detection cycle of the water heater is set to be shorter, the water heater needs to determine whether the temperature reduction corresponding to more consecutive detection cycles is greater than the target reduction, which makes the water heater use a lot of resources for judgment. In this regard, the water heater sets the length of the detection cycle so that the water heater takes into account the water parameters collected more accurately and has fewer resources for judgment.

When it is determined that the water heater is in the water discharge state, step S10 to step S20 are executed.

When it is determined that the water heater is not in a water discharge state, that is, the temperature reduction amount is less than the second target reduction amount, the average water temperature of the inner tank is obtained, and the average water temperature of the inner tank may be the average value of the water temperature in the middle of the inner tank and the water temperature at the top of the inner tank;

After determining that the average water temperature is less than the set temperature and greater than or equal to the preset temperature, control the operation of the bottom heating device at the bottom of the inner tank, where the preset temperature is less than the set temperature;

When it is determined that the average water temperature is less than the set temperature and less than the preset temperature, control the operation of one of the top heating device at the top of the liner and the middle heating device at the middle of the liner, and control the operation of the bottom heating device at the bottom of the liner;

When it is determined that the average water temperature is greater than or equal to the set temperature, each heating device of the water heater is controlled to stop running.

It is understandable that when the water heater is not in the water discharge state, the water heater controls the operation of the corresponding heating device according to the comparison of the average water temperature with the set temperature and preset temperature of the water heater. If the average temperature is greater than the set temperature, the water heater does not need to be heated, and each heating device does not need to operate; when the average temperature is less than the set temperature and greater than the preset temperature, it indicates that the water temperature in the water heater is slightly lower. Control the operation of the bottom heating device, that is Control the operation of the heating device with a slower heating rate of the water to avoid the average temperature being greater than the set temperature due to excessive heating; when the average temperature is less than the preset temperature, it indicates that the water temperature of the water heater is lower. The heating rate of the water is higher than that of the heating device running.

In an embodiment, the set temperature does not refer to the temperature set by the user, but the water heater is determined according to the user's water demand in the current time period and the current inlet water temperature. Specifically, the water heater determines the same time period on multiple different dates in the data collection period. For example, the time period can be 9:00am-10:00am every day in the data collection period to determine whether the user has water for each time period Record, so as to count the number of time periods with water use records, divide the number by the total number at the time point to get the ratio. The ratio can be defined as the reliability of water use. The interval in which the ratio is located determines the user's water level, and finally according to the water level Determine the user's habitual water consumption during this time period.

For example, when the water consumption level is level 1 or 2, the water heater can accurately determine the user's target water consumption during that time period. In this regard, the water heater divides the water consumption associated with each first time period into different water volume intervals, and sets the upper limit of the water volume interval containing the most water consumption as the water consumption corresponding to the water reliability levels 1 and 2.

When the user's water consumption level is level 3 in the first time period, the water heater more accurately determines the user's water consumption in that time period. In this regard, the user's maximum water consumption in the first time period can be used as the water consumption corresponding to water reliability level 3.

When the user's water consumption level is level 4 in the first time period, the user's water consumption in the time period cannot be accurately determined by the water heater. In this regard, the water volume corresponding to water level 3 is added to the preset water volume, and the preset water volume is the redundant volume, and the water volume corresponding to water level 4 is obtained.

When the water level is 5, the water heater basically cannot determine the user's water consumption in the first time period, but the user still has the possibility to use water. For this, the user water volume corresponding to the water level 4 can be added to the preset water volume to get water. Water consumption corresponding to level 5.

When the water heater is not in the discharge state, the accustomed water consumption is the water demand. When the water heater is in the discharge state, the water demand is the difference between the habitual water consumption and the current output of the water heater.

The water demand represents the amount of hot water the user needs in the current time period, and there is a mapping relationship between the hot water amount, the inlet water temperature and the set temperature. The water heater can determine the setting according to the inlet temperature, the hot water amount and the mapping relationship Temperature, the lower the inlet water temperature, the higher the set temperature. It should be noted that when the water heater is not in the water discharge state, that is, when the user is not using the water heater, the inlet water temperature is the water inlet temperature corresponding to the user using the water heater in the current time period; and when the water heater is in the water discharge state, that is, the user uses the water heater When, the inlet water temperature is detected by the second temperature sensor at the bottom of the inner tank of the water heater.

In one embodiment, the inner tank of the water heater is provided with multiple heating devices. In the initial stage of the water heater discharge, the top water temperature drops slightly. If the heating device is running, the top water temperature will rise, causing the temperature limiter to cut off the heating device, causing the water heater to stop running. That is, as the water heater continues to discharge the water, enter the internal The heat at the top of the gallbladder gradually decreases. In the initial stage of the water heater discharge, the bottom heating device at the bottom of the inner tank and the middle heating device at the middle of the inner tank heat up the top water limitedly, and the heat input to the top of the inner tank is less. Therefore, the water heater controls the maximum heating rate of the top water at the initial stage of discharge The top heating device operates to maximize the output of heat at the top of the inner tank. In this regard, when the water outlet from the water heater is detected, the first target heating device is determined according to the heating rate of the water on the top of the inner tank by each heating device, wherein the first target heating device at least includes The heating device with the largest heating rate of the water; controlling the operation of the first target heating device. The water heater is equipped with a safe temperature. When the top water temperature is less than the safe temperature, and the difference between the top water temperature and the safe temperature is large, the first target composed of the top heating device and the middle heating device with a large heating rate for the top water can be controlled The heating device is running; and when the top water temperature is less than the safe temperature and the difference between the top water temperature and the safe temperature is small, the first target heating device composed of the top heating device and the lower heating device with a lower heating rate to the top water is controlled run.

The safe temperature can be less than the limit temperature corresponding to the temperature limiter. After the first target heating device is running, the water heater obtains the current top water temperature of the inner tank in real time. When the current top water temperature is greater than the safe temperature, it indicates that the top water temperature is too high. If the first target heating device continues to run, the temperature limiter will be cut off The operation of the heating device.

After the first target heating device is running, the water heater can calculate the heat output per unit time of the water heater. Heat output per unit time = (outlet water temperature-inlet water temperature) * flow * specific heat capacity * unit time, where flow refers to the flow of the outlet pipe of the water heater, the inlet water temperature can be detected by the temperature sensor at the bottom of the tank, and the outlet water temperature is According to the temperature sensor on the top of the inner tank, the specific heat capacity is the specific heat capacity of water.

The water heater calculates the amount of heat generated by the first target heating device per unit time. Specifically, the heat generated per unit time = heating rate * top capacity of the inner tank * specific heat capacity * unit time * coefficient, the first target heating device has to heat up the water in the middle and bottom, therefore, the first target heating device contributes to the top The heat is less than the actual heat, that is, the coefficient is less than 1. When the heat generated by the first target heating device per unit time is equal to or less than the heat output per unit time of the water heater, then the top water temperature changes less. At this time, the first target heating device can be controlled to continue to operate. If the heat generated per unit time is greater than the heat output per unit time of the water heater, the top water temperature has a rising trend. If the heat generated by the first target heating device per unit time is greater than the heat output per unit time of the water heater, the duration reaches the target time. The top water temperature is too high. At this time, the first target heating device needs to be switched to the second target heating device. In an embodiment, the water heater analyzes the user's water usage pattern in combination with water usage parameters associated with each time period, and then realizes the intelligent function of the water heater according to the water usage pattern. Specifically, the water heater determines the water demand corresponding to the current time period, wherein the water demand is determined according to the reliability of water use; the target set temperature of the water heater is determined according to the water demand; and the target set temperature is determined according to the target Control the operation of the heating device of the water heater.

Specifically, the water heater is set with a data collection cycle, and the length of the data collection cycle can be one week, two weeks, three weeks, etc. When the water heater detects water, that is, when it detects that the user uses the water heater, it will collect the water heater water parameters. The water use parameters include the amount of hot water used by the user to use the water heater, and the water heater is stored in association with the time period to establish a database of water use parameters and time periods corresponding to the data collection period. The water heater can determine the user's water demand in any time period according to the database corresponding to the data collection period, and the time period refers to a certain time period of the day.

The water heater acquires each time period in the data collection cycle, and the date of each time period is different. For example, if the data collection cycle is 7 days, then there are 7 time periods [9:00, 10:00] in total. The water heater determines the time period associated with water use parameters, and counts the number of time periods, which can be regarded as the number of times the user uses water in this time period. The water heater calculates the ratio between the number of times of water use and the total number of time periods, defines the ratio as the reliability of water use, and determines the interval of water reliability, and each interval corresponds to a water consumption. For example, water heaters divide water reliability into multiple reliability intervals, for example, [100%, 85%], (85%, 70%], (75%, 55%], (55%, 40%), and (40%, 0%] Five de-intervals, each reliability interval corresponds to a water level, for example, [100%, 85%] corresponds to a water level of 1, and (85%, 70%] corresponds to a water level Level 2, (75%, 55%) corresponds to level 3, (55%, 40%] corresponds to level 4, and (40%, 0%] corresponds to level 5. Yes. It is understood that the higher the water reliability, the lower the water level. Each water level has a corresponding water consumption. After the water heater determines the water reliability, the reliability interval of the water reliability is determined, and then the water is determined according to the reliability interval. Level, so that the water consumption corresponding to the water level is used as the water demand.

When the water level is level 1 or 2, the water heater can accurately determine the user's target water consumption during that time period. In this regard, the water heater divides the water consumption associated with each first time period into different water volume intervals, and sets the upper limit of the water volume interval containing the most water consumption as the water consumption corresponding to the water reliability levels 1 and 2.

When the user's water consumption level is level 3 in the first time period, the water heater more accurately determines the user's water consumption in that time period. In this regard, the user's maximum water consumption in the first time period can be used as the water consumption corresponding to water level 3.

The water heater can determine the user's water demand in the current time period according to the water level.

After the water heater determines the water demand, the target set temperature of the water heater can be determined according to the water demand, that is, after the water heater controls the heating device through the target set temperature, the hot water provided by the water heater in the current time period is greater than or equal to the user’s The water demand for the current time period. The water heater stores the mapping relationship between the set temperature and the water demand, so that the set temperature can be determined according to the water demand.

It should be noted that, under normal circumstances, the water heater sets the inlet water temperature to be lower, and the inlet water temperature is regarded as a constant. Therefore, the set temperature can be determined only according to the water demand. However, in actual situations, the inlet temperature of the water heater may be higher. If the water heater has a set temperature determined according to the water demand, the actual output of the water heater is greater than the user's water demand, or much greater than the user's water demand In this regard, the water heater user uses the water heater's inlet water temperature or the water heater's current water inlet temperature during the current time period, and the water demand to determine the target set temperature.

The water heater is equipped with multiple water discharge modes, including water discharge without heating mode, water discharge heating mode, and capacity increasing mode. The water heater has a corresponding maximum hot water output in different water discharge modes. Specifically, the water heater divides the inlet water temperature 5°C~40°C into N sections, the outlet water temperature 35°C~45°C is divided into N sections, and the set temperature 35°C~80°C is divided into N sections. When the outlet water temperature is 35°C~45°C, the water heater The output is hot water; in different heating modes, the water heater sets different inlet water temperature and set temperature, and collects the output of the outlet water temperature between 35°C and 45°C. This output is the maximum hot water output corresponding to the water release mode the amount. The water heater constructs a mapping relationship table according to the data relationship between the maximum hot water output, the inlet water temperature, the set temperature, and the water discharge mode. The water heater only needs to find it in the mapping relationship table according to the water discharge mode, the water inlet temperature and the set temperature Maximum hot water output. It should be noted that the set temperature used by the water heater to determine the maximum hot water output refers to the current set temperature corresponding to the current time period of the water heater.

After determining the maximum hot water output corresponding to each water discharging mode, the water heater compares the water demand with the maximum hot water output, and uses the water discharging mode corresponding to the maximum hot water output greater than the water demand as the target water discharging mode. The water heater searches for the set temperature in the mapping relationship table according to the target water discharge mode, the maximum hot water output corresponding to the target water discharge mode, and the inlet water temperature, and the set temperature is the target set temperature.

The water release mode in which the maximum hot water output is greater than the user's water demand can be used as the target water release mode, but when the difference between the maximum hot water output and the water demand is large, it indicates that the water heater provides more hot water. More energy is wasted. In this regard, the water heater first judges whether the water discharging mode with a smaller maximum hot water output is the target water discharging mode, and then judges whether the water discharging mode with a larger maximum hot water output is the target water discharging mode, so that the hot water provided by the water heater to the user is not excessive.

In the water release and non-heating mode, the maximum hot water output corresponding to the water heater is the smallest. Therefore, the water heater first determines whether the maximum hot water output corresponding to the water release and non-heating mode is greater than the water demand. If it is, the water discharge and non-heating mode is set as the target water release mode. .

If the maximum hot water output corresponding to the water release and non-heating mode is less than or equal to the user's water demand, the water heater then judges whether the maximum hot water output corresponding to the water heating mode is greater than the water demand, and the maximum hot water output corresponding to the water heating mode The amount is greater than the maximum hot water output corresponding to the water discharge without heating mode. If the corresponding maximum hot water output in the water discharge heating mode is greater than the water demand, the water discharge heating mode is taken as the target water discharge mode.

If the maximum hot water output corresponding to the water release heating mode is less than or equal to the user's water demand, the water heater will use the capacity increase mode as the target water release mode. The maximum hot water output corresponding to the capacity increase mode is the largest of the three water release modes. , Capacity increasing mode refers to the water heater collecting other means to increase the hot water output. For example, the water heater is equipped with a backup heating device, and when the water heater enters the capacity increasing mode, the backup heating device is activated.

When the water heater is in the state of discharging water, that is, when the water heater is used by the user, the water heater has already output a part of the hot water. At this time, the hot water needs to re-determine the set temperature so that the remaining output of the water heater and the output of the hot water Equal to or slightly greater than the user's water demand.

In this regard, when the water heater is in the state of discharging water, it detects the output of hot water in the water heater in real time. The output of hot water is the output of hot water. The water heater is calculating the difference between the water demand and the output of hot water. , The difference is the remaining water consumption. The water heater collects and detects the inlet water temperature through the temperature sensor at the bottom of the inner tank. The difference in the mapping relationship table is based on the inlet water temperature, remaining water consumption and the target water discharge mode determined before the water heater The set temperature is the current set temperature of the water heater, and the water heater controls the heating device according to the current set temperature, so that the water heater wastes less energy.

In an embodiment, the water heater analyzes the user's water usage pattern in combination with water usage parameters associated with each time period, and then realizes the intelligent function of the water heater according to the water usage pattern. For example, the water heater obtains the first water use parameter corresponding to the user in the first time period, where the first water use parameter includes a first water consumption and a first water temperature; the determination is made according to the first water use parameter and the heating power of the water heater The target heating time period of the water heater corresponding to the first time period is advanced; the operation of the heating device of the water heater is controlled according to the target heating time period in advance.

Specifically, the first water use parameter includes a first water consumption, and the first water use parameter may also include a first water temperature. The first water temperature is the temperature of the hot water required by the user in the first time period. The first water temperature may be Determined according to the user's habitual water temperature in the first time period.

Specifically, the first water temperature can be regarded as hot water, that is, the first water temperature can be regarded as the temperature that defines the hot water, and the first water temperature can be 35°C to 45°C. After the water heater has determined the first water use parameter, the target set temperature of the water heater can be determined according to the first water use parameter, that is, after the water heater controls the heating device operation by the target set temperature, the hot water provided by the water heater in the first time period is greater than or Equal to the amount of hot water the user has in the current time period. The water heater stores a mapping relationship between the set temperature, the first water consumption, and the first water temperature, so that the set temperature can be determined according to the first water consumption and the first water temperature. It should be noted that, under normal circumstances, the water heater sets the inlet water temperature to be lower, and the inlet water temperature is regarded as a constant. Therefore, the set temperature can be determined only according to the water consumption and the water temperature. However, in actual situations, the water inlet temperature of the water heater may be higher. If the temperature of the water heater is determined according to the water consumption, the actual output of the water heater is greater than the user's water consumption, or much greater than the user's water consumption, resulting in Water heater energy is wasted. In this regard, the water heater user uses the water heater's inlet water temperature or the current water heater's current water inlet temperature, water temperature and water consumption to determine the target set temperature.

Since the water heater is heated in advance, it can be considered that the water heater has not entered water, and the water heater obtains the water temperature in the inner tank, which may be the average water temperature in the inner tank. The bottom and top of the inner tank are equipped with temperature sensors. The average value calculated from the water temperature detected by the two temperature sensors is the water temperature of the inner tank. Of course, the inner tank can also be equipped with multiple temperature sensors, and the average water temperature collected by multiple temperature sensors corresponds to the average The water temperature is the inner tank water temperature.

When the water heater determines the target set temperature, the heating rate of the water heating device and the inner tank water temperature, the pre-heating time of the water heater can be calculated, and the pre-heating time can be set as the target pre-heating time.

After the water heater calculates the target heating time in advance, the water heater can obtain the starting time of the heating device according to the start time point of the first time period and the target heating time in advance, and then control the heating device to operate when the current time reaches the starting time. It should be noted that multiple heating devices can be set in the water heater, for example, two or three. When the water heater runs in advance, the water heater needs to control the operation of each heating device.

The water heater first determines the advance heating duration corresponding to the first time period and the second time period. The second time period is located after the first time period and is temporally adjacent to the first time period.

The water heater calculates the first interval time between the start time of the first time period and the start time of the second time period. If the first interval time is greater than or equal to the second advance heating time, it indicates that the user is in the second time The water consumption in the first time period will affect the water consumption of the user in the first time period. For this, the water heater calculates the first water consumption corresponding to the first time period and the third water use parameter corresponding to the second time period. The third water use parameter includes the first time period. Compared with the total water consumption in the second time period, or including the total water consumption and the water temperature, the water temperature is the user's water temperature in the first time period and the second time period, and the first time period is determined according to the third water use parameter The goal is to advance the heating time, so that the water heater can provide users with sufficient hot water in the first time period and the second time period.

When the first interval is less than the second pre-heating time, it indicates that the user's water use in the second time period will not affect the user's water use in the first time period. At this time, the advance heating time corresponding to the first time period is taken as Target heating time in advance.

When the first interval is longer than the corresponding advance heating time of the second time period, the water heater will determine the target heating time of the first time period according to the first water use parameter and the second water use parameter, that is, the target heating time of the second time period The duration is actually the first interval duration plus the target advance heating duration corresponding to the first time period, and there is no need to repeatedly determine the target advance heating duration for the second time period. In this regard, when the water heater determines the target heating time length of the first time period in advance, it is necessary to determine whether the water heater simultaneously determines the target heating time length corresponding to the first time period and the third time period before the first time period. The first time period is adjacent in time. In this regard, the water heater calculates the second interval between the start time of the third time period and the start time of the first time period. If the second interval is longer than the first advance heating time, it can be determined that the water heater has not determined the first time in advance. The target heating time in advance of the time period needs to be determined for the target heating time in advance of the first time period. When the second interval is less than or equal to the first heating time in advance, it can be determined that the water heater determines the target heating time in advance for the first time period in advance, and the water heater can determine the target corresponding to the first time period according to the target heating time in the third time period in advance The heating time in advance, that is, the target heating time in advance in the third time period plus the second interval time is the target heating time in advance in the first time period.

In an embodiment, the water heater analyzes the user's water usage pattern in combination with water usage parameters associated with each time period, and then realizes the intelligent function of the water heater according to the water usage pattern. For example, the water heater determines the user's water reliability for the first time period, and determines the target water consumption according to the water reliability; determines the target operating parameters corresponding to the water heater according to the target water consumption; controls the water heater to operate The first time period is operated according to the target operating parameter, and/or the water heater is controlled to operate before the first time period according to the target operating parameter.

Specifically, the water heater can determine the user's water reliability in a certain period of time, and the water reliability represents the probability of the user using the water heater during that period of time. The higher the water reliability, the greater the probability of the user using the water heater in this period of time. The water use reliability corresponding to the first time period can be determined according to the user's water use times in the first time period. When the number of first time periods on different dates is constant, the more water use times, the greater the water use reliability. After the water heater determines the water reliability, the reliability interval of the water reliability is determined, and then the water level is determined according to the reliability interval, so that the water consumption corresponding to the water level is used as the target water consumption.

The water heater has a data collection period, and the length of the data collection period can be the most recent one week, two weeks, or three weeks. The water heater determines the total number of the same first time period on different days in the data collection cycle. For example, when the time length of the data collection cycle is one week, then the data collection cycle has 7 first time periods from 9 am to 10 am, That is, the total number of the first time period is 7. When the water heater detects that the user uses the water heater, it will associate the time period in which the water heater is used with the user's water consumption. Therefore, the water heater determines the number of first time periods with water after obtaining multiple first time periods.

The water heater may determine the water reliability according to the number of the first time period with water and the total number of the first time period. For example, the water heater stores the mapping relationship between the number of the first time period, the total number of the first time period and the reliability of water use. After the water heater determines the total number of the first time period and the number of the first time period with water, The water reliability can be determined according to the mapping relationship, the total number of the first time period, and the number of the first time period with water. The water heater calculates the first ratio between the number of the first time period with water consumption and the total number of the first time period. The first ratio represents the frequency of the user’s water use in the first time period. The greater the first ratio, the greater the user’s The higher the frequency of water use over time. In this regard, the first ratio can be directly used as the water reliability to characterize the reliability of the user's water use during this time period.

The water heater divides a day into multiple time periods. After a user uses the water heater in a certain time period, the probability of the user using hot water in the next time period will be affected. For example, if the user takes a shower at 8pm-9pm, the user will fall asleep. Then 9pm-10pm, 10pm-11pm, and 11pm-12pm, the user's probability of using water will decrease, so , If you calculate the time between 9 pm and 10 pm, you need to consider the impact of the user's water use during the time period before 9 pm to 10 pm.

In this regard, the water heater determines a second time period earlier than the first time period, the second time period is different from the date of the first time period, and the second time period includes one or more sub-time periods, for example, in the first time period When it is 1:00am-2:00am, the second time period is 0:00am-1:00am, and the second time period contains only one sub-time period, which is 0:00am-1:00am; One time period is 3:00am-4:00am, then the second time period is 0:00am-3:00am, and the second time period includes three sub-time periods, namely 0:00am-1:00am, 1:00am- 2:00am, 2:00am-3:00am.

The water heater calculates the total number of sub-periods and the number of sub-periods with water in the data collection cycle, so as to obtain the second ratio according to the number of sub-periods with water and the total number of sub-periods. If the second period includes multiple sub-periods Time period, there are multiple second ratios.

After the second ratio is obtained, corresponding weights are set for each sub-time period and the first time period. Since the earlier sub-time period has less influence on the first time period, the earlier time period has a smaller weight, that is, the first time period has the largest weight. The water heater then performs a weighted calculation on each of the second ratio and the first ratio to obtain the target ratio, which is the user's water reliability in the first time period.

The user has more historical water use times for the water heater in a certain time period, and less historical water use times for the water heater in another time period. The user's multiple times of water use in a time period are recorded as the historical book times. For example, the user During a business trip in a certain week, the water heater does not have water consumption parameters for this week. At this time, when the water heater is performing water reliability statistics, due to the user's business trip, the user's water reliability during this time period is inaccurate, that is, the user's water reliability during this time period is less than the actual water reliability.

In this regard, the water heater is provided with multiple data collection cycles, and the time length of the various data collection cycles is different, for example, the time length is one week, the time length is two weeks, and the time length is three weeks. The last day of the data collection period is the current day. It can be understood that the data collected in the data collection period is updated with the passage of time. For example, a data collection period with a time length of one week, if the date of the first time period is June On the 8th, the earliest day of the data collection cycle time is June 1, and the schedule in the first time period is changed to June 9, then the earliest day of the data collection cycle time is updated to June 2, that is, the water heater Replace the water parameters collected on June 9 with the water parameters collected on June 1.

The water heater sequentially calculates the total number of the first time period and the number of the first time period with water in each type of data collection period. The number of the first time period with water use divided by the total number of the first time period is the corresponding data collection period The third ratio. As a result, the water heater calculates multiple third ratios, and then uses the largest third ratio as the user's corresponding water reliability in the first time period.

In an embodiment, the water heater analyzes the user's water usage pattern in combination with water usage parameters associated with each time period, and then realizes the intelligent function of the water heater according to the water usage pattern. For example, the water heater obtains the first total number of the first time period in the current data collection period, where each of the first time periods belongs to a different date; the first total number of the first time period is set according to different presets The interval days are divided into a plurality of calculation sets; the first water use reliability of each calculation set is calculated; and the current data collection period is determined according to the first water use reliability of the multiple calculation sets.

Specifically, the water heater can collect the water consumption parameters of the user using the water heater, and conduct self-learning according to the water usage parameters, thereby analyzing the user's usage law of the water heater. The usage law is the user's water usage law, and the water usage law refers to the user during a certain period of time. Water is needed, or water is not needed for a certain period of time.

The user uses water for a certain period of time on a certain day, but does not use water for this period of the next day, that is, the user has fluctuations in the first period of time. If the fluctuation is large, it can indicate that the user does not have a regularity of water use during that period of time. That is, the data collection period is invalid in this time period.

Specifically, the water heater needs to first determine whether a certain time period in the data collection cycle is valid. If it is valid, it indicates that the user’s water consumption during this time period is less fluctuating. The data collection cycle is the user habit cycle, that is, the user is in the The time period has a water usage pattern; if it is invalid, it means that the user's water consumption during this time period fluctuates greatly, and the user has no water usage pattern during this time period. Specifically, taking the time length of the data collection period of 7 days as an example, the water heater obtains the first time periods of different dates in the data collection period, and the first total number of the first time periods is 7.

The water heater takes a different preset interval of days K, K is 1 day, 2 days, 3 days, 4 days, 5 days, 6 days...N-1 day, N is the number of days in the data collection cycle, that is, data collection The cycle includes N first time periods. In this embodiment, the water heater can choose more than two preset intervals from 1 day, 2 days, 3 days, 4 days, 5 days, 6 days...N-1 days. The number of days is used to obtain a corresponding number of calculation sets. For example, if the number of preset interval days is 3, there are 3 calculation sets. Calculate the interval length between the first time periods adjacent in time in the set as the preset interval days. For example, if the data collection period is 7 days and the preset interval days are 1 day and 2 days respectively, then the calculation set corresponding to the preset interval of 1 day contains 7 first time periods, and the preset interval of days is 2 days. The calculation set of contains 4 first time periods of 1, 3, 5, and 7. The more preset interval days are adopted, the more accurate the data collection period is. In addition, the number of first time periods in each calculation set can be limited, and the number of first time periods in the calculation set is greater than or equal to the preset number to avoid the situation that too few samples in the calculation set cause large errors Appears, the preset number can be any suitable value.

After determining the calculation set, calculate the first water use reliability of each calculation set. Specifically, determine the second total number of the first time period in the calculation set and the number of the first time period with water, and the first time with water The ratio of the number of segments divided by the second total is the first water reliability.

After the water heater determines the first water reliability corresponding to each calculation set, it determines the maximum first water reliability as the target water reliability, and then calculates the first water reliability between the target water reliability and the other first water reliability in turn. Difference value, and use the first difference value greater than the preset difference value as the target difference value to determine the target difference value; the water heater then calculates the first ratio of the target difference value to the total number of the first difference value. A ratio is greater than the first preset threshold. The first preset threshold can be any suitable value, such as 70%, which indicates that the user's water consumption fluctuation is within an acceptable range, that is, the fluctuation is normal. At this time, it is determined that the data collection period is valid. The data collection period is the user's habitual period; if the first ratio is less than or equal to the first preset threshold, it indicates that the user's water consumption fluctuates abnormally, and the data collection period is invalid, that is, the user does not match in the first time period of the data collection period. No water usage pattern.

It should be noted that multiple data collection periods can be set in the water heater, and the length of each data collection period is different. When it is determined that the current data collection period is invalid, the next data collection period is regarded as the current data collection period until it is determined to be valid. The data collection cycle. Of course, if all the data collection periods are invalid, it means that the user does not have a regularity of water consumption in the first time period.

The water heater can calculate the range and average value of the first water reliability of each calculation set, so as to determine whether the user's water consumption fluctuation in the first time period is normal according to the range and average value, that is, judge whether the data collection period is valid.

Specifically, the water heater extracts the maximum first water reliability and the minimum water reliability to calculate the second difference, and then calculates the average value corresponding to each first water reliability. The water heater calculates a second ratio between the second difference and the average value, and then determines whether the second ratio is less than or equal to a second preset threshold. The second preset threshold can be any suitable value, such as 150%. When the second ratio is less than or equal to the second preset threshold, it can be determined that the user's water consumption during the first time period is normal, that is, the data collection period is valid; if the second ratio is greater than the second preset threshold, the data collection period is invalid .

In an embodiment, the water heater analyzes the user's water usage pattern in combination with water usage parameters associated with each time period, and then realizes the intelligent function of the water heater according to the water usage pattern. For example, when the water heater determines that the user does not need to use water for the first time period, obtain the water reliability and the inlet water temperature corresponding to the first time period; determine the target set temperature of the water heater according to the water reliability and the inlet water temperature .

Specifically, the water heater determines the current water use level corresponding to the water use reliability, where the greater the water use reliability, the lower the current water use level; and the temperature increment value is determined according to the current water use level, where the The lower the current water level, the smaller the temperature increment value; the target set temperature of the water heater is determined according to the temperature increment value and the inlet water temperature.

If the current water level is level 1, it indicates that the user does not use the water heater in the first time period with high accuracy. Therefore, the target setting temperature can be set as the inlet water temperature, and the inlet water temperature is stored by the water heater in the first time period The historical inlet water temperature. If the current water use level is level 2, it indicates that the user has a high accuracy whether the water heater is not used or not. At this time, the target setting is set to the inlet water temperature + the temperature increment value m. By analogy, when the current water level is higher, the accuracy of the water heater in judging that the user does not use the water heater in the first period of time is lower, and the target setting temperature is higher. The target setting temperature can be determined by the following formula, specifically: target setting Constant temperature=inlet water temperature+K*temperature increment value, where K=0,1,2,3….., the water reliability level determines the size of K, when the water reliability level is 1, K =0, when the water reliability level is level 2, K=1, and so on.

The present application also provides a water heater, the middle of the inner tank of the water heater is provided with a temperature sensor, the water heater further includes a memory, a processor, and a control program of the water heater stored in the memory and running on the processor The temperature sensor is connected to the processor, and the control program of the water heater is executed by the processor to implement the steps of the water heater control method described in the above embodiment.

The present application also provides a computer-readable storage medium that stores a control program of a water heater, and when the control program of the water heater is executed by a processor, each of the control methods of the water heater described in the above embodiment is implemented. step.

The serial numbers of the foregoing embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article or device that includes the element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of this application essentially or the part that contributes to the exemplary technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM) as described above. , Magnetic disk, optical disk), including several instructions to make a terminal device (can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the method described in each embodiment of the present application.

The above are only optional embodiments of this application, and do not limit the scope of this application. Any equivalent structure or equivalent process transformation made by using the description and drawings of this application, or directly or indirectly applied to other related technologies In the same way, all fields are included in the scope of patent protection of this application.

Claims

A control method of a water heater, wherein heating devices are respectively provided at the bottom and top of the inner tank of the water heater, and the control method of the water heater includes the following steps:

Obtaining the middle water temperature corresponding to the inner tank; and

It is determined that the middle water temperature is less than or equal to a set temperature, and the heating device at the bottom of the inner tank is controlled to operate.
The control method of the water heater according to claim 1, wherein after the step of obtaining the water temperature in the middle of the inner tank, the method further comprises:

It is determined that the middle water temperature is greater than the set temperature, and the water heater is determined to be in a water discharge state, and the heating device on the top of the inner tank is controlled to operate.
The control method of the water heater according to claim 2, wherein the step of determining that the water heater is in a water discharge state comprises:

Determine the amount of temperature decrease in the detection period according to the middle water temperature; and

It is determined that the temperature decrease corresponding to a plurality of consecutive detection cycles is greater than the preset decrease, and it is determined that the water heater is in a water discharge state.
The control method of the water heater according to claim 1, wherein after the step of obtaining the water temperature in the middle of the inner tank, the method further comprises:

Determine that the central water temperature is greater than the set temperature, and determine that the water heater is in a drain state, obtain the current maximum hot water output of the water heater and the target water consumption corresponding to the user in the current time period; and

When it is determined that the maximum hot water output is less than or equal to the target water consumption, the heating device at the top of the inner tank is controlled to operate, or the heating device corresponding to the top and bottom of the inner tank is controlled to operate.
The control method of the water heater according to any one of claims 1 to 4, wherein after the step of obtaining the water temperature in the middle of the inner tank, the method further comprises:

Determine the water demand for the time period at the current time point, and determine the current water inlet temperature of the water heater; and

The set temperature is determined according to the water demand and the current inlet water temperature, and the lower the inlet water temperature, the lower the set temperature.
The method for controlling a water heater according to claim 5, wherein the step of determining the inlet water temperature of the water heater comprises:

Determine that the water heater is not in a water discharge state, and use the pre-stored water inlet temperature as the current water inlet temperature; and

It is determined that the water heater is in a water discharge state, and the current water temperature at the bottom of the inner tank is used to determine the current water inlet temperature.
The control method of the water heater according to claim 5, wherein the water demand is determined according to the user's habitual water consumption in the current time period and the output hot water volume of the water heater in the current time period.
The water heater control method according to claim 7, wherein the habitual water consumption is determined according to the user's water use reliability in the current time period, and the water use reliability is based on the same history in the data collection period as the current time period. The total number of time periods and the number of historical time periods associated with water use parameters are determined, and each of the historical time periods has different dates.
The control method of the water heater according to claim 1, wherein the control method of the water heater comprises the following steps:

There is no heating device in the middle of the inner tank of the water heater, and the step of obtaining the middle water temperature corresponding to the inner tank is executed; and

A heating device is provided in the middle of the inner tank of the water heater, and the water output from the water heater is detected, the first target heating device is determined according to the heating rate of the water on the top of the inner tank of each heating device, and the first target is controlled The heating device is operated, wherein the first target heating device at least includes a heating device that has the largest heating rate for the water at the top of the inner container.
9. The control method of a water heater according to claim 9, wherein after the step of controlling the operation of the first target heating device, the method further comprises:

Obtaining the current top water temperature of the inner tank;

It is determined that the current top water temperature is greater than the safe temperature of the water heater, and a second target heating device is determined according to the heating rate corresponding to each heating device, wherein the second target heating device raises the temperature of the water at the top of the inner tank The rate is less than the rate of heating of the water at the top of the inner container by the first target heating device; and

Control the first target heating device to stop operating, and control the second target heating device to run.
The control method of a water heater according to claim 10, wherein:

It is determined that the first target heating device includes one of the middle heating device and the bottom heating device, and the top heating device, and the second target heating device includes the top heating device, or the second target The heating device includes the middle heating device and the bottom heating device.
The method for controlling a water heater according to claim 10, wherein after the step of controlling the operation of the second target heating device, the method further comprises:

It is determined that the current top water temperature is greater than the safe temperature, and a third target heating device is determined according to the heating rate corresponding to each heating device, wherein the heating rate of the third target heating device to the water at the top of the inner tank is less than The heating rate of the water at the top of the inner container by the second target heating device; and

Control the second target heating device to stop operating, so as to control the third target heating device to run.
The method of controlling a water heater according to claim 12, wherein:

It is determined that the second target heating device includes the top heating device, or the second target heating device includes the middle heating device and the bottom heating device, and the third target heating device includes the bottom heating device .
9. The control method of a water heater according to claim 9, wherein after the step of controlling the operation of the first target heating device, the method further comprises:

Determine the heat output per unit time of the water heater, and obtain the heating rate of the water in the inner tank;

Determining the amount of heat generated by the first target heating device per unit time according to the heating rate; and

If the heat generated by the first target heating device per unit time is greater than the heat output per unit time of the water heater and the duration reaches the target time period, a second target heating device is determined, wherein the heat output by the second target heating device is less than the The heat output by the first target heating device; controlling the first target heating device to stop running, and control the second target heating device to run.
The water heater control method according to claim 14, wherein the target duration is determined according to the difference between the heat generated per unit time by the first target heating device and the heat output per unit time by the water heater, and the difference The value has a negative correlation with the target duration.
9. The control method of the water heater according to claim 9, wherein the control method of the water heater further comprises:

Acquiring the temperature decrease amount of the water temperature collected by the temperature sensor set in the inner tank of the water heater during the detection period; and

When it is determined that the temperature decrease corresponding to a plurality of consecutive detection periods is greater than the first target decrease, the heating of the water at the top of the tank according to each heating device in the water heater tank is executed The rate determines the step of the first target heating device.
9. The method for controlling a water heater according to claim 9, wherein after the step of obtaining the temperature decrease amount of the water temperature collected by the temperature sensor provided in the inner tank of the water heater during the detection period, the method further comprises:

When it is determined that the temperature decrease amount is less than a second target decrease amount, obtaining an average water temperature of the inner tank, wherein the first target decrease amount is greater than the second target decrease amount;

Determining that the average water temperature is less than a set temperature and greater than or equal to a preset temperature, and controlling the operation of the bottom heating device at the bottom of the inner tank, wherein the preset temperature is less than the set temperature; and

Determine that the average water temperature is less than the set temperature and less than the preset temperature, control the operation of one of the top heating device at the top of the liner and the middle heating device at the middle of the liner, and control the bottom heating of the bottom of the liner The device is running.
9. The water heater control method according to claim 9, wherein after the step of obtaining the average water temperature of the inner tank, the method further comprises:

It is determined that the average water temperature is greater than or equal to the set temperature, and each heating device of the water heater is controlled to stop operating.
A water heater, wherein a temperature sensor is arranged in the middle of the inner tank of the water heater, and the water heater further includes a memory, a processor, and a control program of the water heater stored in the memory and running on the processor. The temperature sensor is connected to the processor, and the following steps are implemented when the control program of the water heater is executed by the processor:

Acquiring the middle water temperature corresponding to the inner tank; and

When it is determined that the middle water temperature is less than or equal to the set temperature, the operation of the heating device at the bottom of the inner tank is controlled.
A computer-readable storage medium, wherein the computer-readable storage medium stores a control program of a water heater, and the control program of the water heater is executed by a processor to implement the following steps:

Acquiring the middle water temperature corresponding to the inner tank; and

When it is determined that the middle water temperature is less than or equal to the set temperature, the operation of the heating device at the bottom of the inner tank is controlled.