CN110398063B

CN110398063B - Water heater, control method thereof and computer-readable storage medium

Info

Publication number: CN110398063B
Application number: CN201910607830.3A
Authority: CN
Inventors: 申勇兵; 谢亚光; 王明
Original assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2021-06-22
Anticipated expiration: 2039-07-05
Also published as: CN110398063A

Abstract

The invention discloses a control method of a water heater, which is characterized in that heating devices are respectively arranged at the bottom and the top of an inner container of the water heater, and the control method of the water heater comprises the following steps: acquiring the middle water temperature corresponding to the inner container; and controlling a heating device at the bottom of the inner container to operate when the water temperature in the middle part is determined to be less than or equal to the set temperature. The invention also discloses a water heater and a computer readable storage medium. The water heater has good shower effect.

Description

Water heater, control method thereof and computer-readable storage medium

Technical Field

The invention relates to the technical field of water heaters, in particular to a water heater, a control method thereof and a computer readable storage medium.

Background

At present, a water heater has become a popular household appliance. The water heater is favored by people because of the advantages of constant outlet water temperature, unlimited installation conditions and the like.

In an exemplary technology, when a user uses a water heater, a heating device at the top of the water heater is started, so that the temperature of output water of the water heater can reach the temperature of bathing, but the heating device at the top only heats the water at the top of a liner of the water heater, and if the bathing time of the user is long, or the flow of hot water output by the water heater is large, the temperature of the output water of the water heater is greatly reduced, and the shower effect of the water heater is poor.

Disclosure of Invention

The invention mainly aims to provide a water heater, a control method thereof and a computer readable storage medium, and aims to solve the problem that the water heater is poor in shower effect.

In order to achieve the above object, the present invention provides a control method of a water heater, wherein heating devices are respectively arranged at the bottom and the top of an inner container of the water heater, the control method of the water heater comprises the following steps:

acquiring the water temperature of the middle part of the inner container;

and controlling a heating device at the bottom of the inner container to operate when the water temperature in the middle part is determined to be less than or equal to the set temperature.

In an embodiment, after the step of obtaining the water temperature at the middle of the inner container, the method further includes:

and when the water temperature in the middle part is determined to be higher than the set temperature and the water heater is determined to be in a water discharging state, controlling the heating device at the top of the inner container to operate.

In one embodiment, the step of determining that the water heater is in the water discharge state comprises:

determining a temperature decrease amount of the water temperature at a middle portion of the sensing period;

and when the temperature reduction amount corresponding to a plurality of continuous detection periods is determined to be larger than the preset reduction amount, judging that the water heater is in a water discharging state.

when the water temperature in the middle part is determined to be higher than the set temperature and the water heater is determined to be in a water discharging state, the current maximum hot water output quantity of the water heater and the target water consumption quantity corresponding to the current time period of the user are obtained;

and when the maximum hot water output quantity is determined to be less than or equal to the target water consumption, controlling a heating device at the top of the inner container to operate, or controlling heating devices corresponding to the top and the bottom of the inner container to operate.

determining the water demand of the time period of the current time point, and determining the current water inlet temperature of the water heater;

and determining a set temperature according to the water demand and the current water inlet temperature, wherein the lower the water inlet temperature is, the lower the set temperature is.

In one embodiment, the step of determining the temperature of the water supply to the water heater comprises:

when the water heater is determined not to be in the water discharging state, taking the pre-stored inlet water temperature as the current inlet water temperature;

and when the water heater is determined to be in a water discharging state, determining the current water temperature at the bottom of the inner container to be the current water inlet temperature.

In one embodiment, the water demand is determined based on the current time period of the user's habitual water usage and the amount of hot water that the water heater has exported during the current time period.

In one embodiment, the habit water consumption is determined according to the water use reliability of the user in the current time period, the water use reliability is determined according to the total number of the historical time periods which are the same as the current time period in the data acquisition cycle and the number of the historical time periods of the associated water use parameters, and the dates of the historical time periods are different.

In order to achieve the above object, the present invention further provides a water heater, wherein a temperature sensor is disposed in the middle of an inner container of the water heater, the water heater further includes a memory, a processor, and a control program of the water heater, which is stored in the memory and can be run on the processor, the temperature sensor is connected to the processor, and the control program of the water heater, when executed by the processor, implements the steps of the control method of the water heater as described above.

To achieve the above object, the present invention also provides a computer-readable storage medium storing a control program of a water heater, which when executed by a processor, implements the steps of the control method of the water heater as described above.

According to the water heater and the control method thereof and the computer readable storage medium, the water heater obtains the water temperature of the middle part of the inner container, and the water temperature of the middle part is less than or equal to the set temperature, so that the heating device at the bottom of the inner container of the water heater is controlled to operate; when the water heater discharges water, the water temperature in the inner container of the water heater is reduced from bottom to top in sequence, if the water temperature in the middle of the inner container is smaller than or equal to a set temperature, the water temperature at the top of the inner container is low, namely the water outlet temperature of the water heater is low, the water heater controls the heating device at the bottom of the inner container to operate so as to integrally heat the water in the inner container, the temperature of the hot water output by the water heater is high under the condition that the water inlet flow is high or the bathing time of a user is long, and the shower effect of the water heater is good.

Drawings

FIG. 1 is a schematic diagram of a hardware structure of a water heater according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a first embodiment of a control method of a water heater according to the present invention;

FIG. 3 is a schematic structural view of the water heater of the present invention;

FIG. 4 is a schematic flow chart of a second embodiment of a control method for a water heater according to the present invention;

FIG. 5 is a schematic flow chart of a third embodiment of a control method for a water heater according to the present invention;

FIG. 6 is a schematic diagram of temperature curves detected by various temperature sensors when the water heater discharges water;

FIG. 7 is a flow chart of a fourth embodiment of the control method of the water heater of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The main solution of the embodiment of the invention is as follows: acquiring the water temperature of the middle part of the inner container; and controlling a heating device at the bottom of the inner container to operate when the water temperature in the middle part is determined to be less than or equal to the set temperature.

When the water heater discharges water, the water temperature in the inner container of the water heater is reduced from bottom to top in sequence, if the water temperature in the middle of the inner container is smaller than or equal to a set temperature, the water temperature at the top of the inner container is low, namely the water outlet temperature of the water heater is low, the water heater controls the heating device at the bottom of the inner container to operate so as to integrally heat the water in the inner container, the temperature of the hot water output by the water heater is high under the condition that the water inlet flow is high or the bathing time of a user is long, and the shower effect of the water heater is good.

As one implementation, the water heater may be as shown in fig. 1.

The embodiment of the invention relates to a water heater, which comprises: a processor 101, such as a CPU, a memory 102, a communication bus 103, a temperature sensor 104 located in the middle of the liner, a bottom heating device 105 located at the bottom of the liner, and a top heating device 106 located at the top of the liner. Wherein a communication bus 103 is used for enabling the connection communication between these components.

The memory 102 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). As shown in fig. 1, a control program of the water heater may be included in the memory 103 as a kind of computer storage medium; and the processor 101 may be configured to call the control program of the water heater stored in the memory 102 and perform the following operations:

acquiring the water temperature of the middle part of the inner container;

Based on the hardware architecture of the water heater, the embodiment of the control method of the water heater is provided.

Referring to fig. 2, fig. 2 is a first embodiment of a control method of a water heater according to the present invention, the control method of the water heater including the steps of:

step S10, acquiring the water temperature of the middle part of the inner container;

in this embodiment, the middle part of water heater inner bag is equipped with middle part temperature sensor, and middle part temperature sensor is used for detecting the temperature of the middle part of inner bag. The middle part of the inner container refers to the position between the bottom of the inner container and the top of the inner container. Referring to fig. 3, fig. 3 is a schematic structural diagram of the water heater, the height of the liner of the water heater is H, the liner from the bottom wall of the liner to 1/4H away from the bottom wall is defined as the bottom of the liner, the liner from the top wall of the liner to 1/4H away from the top wall is defined as the top wall of the liner, the rest portions are defined as the middle portion of the liner, corresponding temperature sensors are arranged at the bottom of the liner, the middle portion of the liner and the top of the liner, and heating devices are respectively arranged at the top of the liner and the bottom of the liner.

The hot water output of the water heater is that cold water is input from a water inlet pipe at the bottom of the inner container and hot water at the top of the inner container is extruded out at the same time. Because of the density difference of cold water and hot water, the temperature of the inner bag is low down and high in proper order layering change, when the inner bag discharges hot water, at first can be that the temperature of inner bag bottom changes earlier, reaches the temperature that the temperature of inner bag bottom can be the same with the temperature of intaking after the certain time, then passes a period again, and the temperature at inner bag middle part reduces gradually, and then makes the temperature change at the top of inner bag. In this embodiment, the bottom and the top of the inner container of the water heater are respectively provided with a heating device. The middle part of the inner container is not provided with a heating device, and the water temperature in the middle part of the inner container is less influenced by the heating device, so that whether the water heater needs to be heated or not can be judged according to the water temperature in the middle part of the inner container.

And step S20, when the water temperature in the middle part is determined to be less than or equal to the set temperature, controlling a heating device at the bottom of the inner container to operate.

In this embodiment, the water temperature at the middle of the inner container and the set temperature can be compared by the water heater, and if the water temperature at the middle of the inner container is lower than or equal to the set temperature, it indicates that the water temperature at the top of the water heater is possibly lower than the set temperature, and accordingly, the operation of the heating device at the bottom of the inner container is controlled. Heating devices are arranged at the top and the bottom of the water heater, but the higher the temperature of the water, the lower the density of the water, namely the water with the high temperature is positioned at the top of the water heater. If the heating device on the top of the inner container is controlled to operate, the hot water on the top has lower density, so that the heating rate of the water in the middle is lower. Therefore, the water heater controls the operation of the heating device at the bottom of the inner container, so that the heating device heats the water at the bottom of the inner container, and the water heated at the bottom floats upwards, so that the cold water at the bottom of the middle part and the top of the inner container is deposited to the bottom and the middle part, namely the water at each part in the inner container is heated by the heating device at the bottom of the water heater.

When the water temperature in the middle of the inner container is higher than the set temperature, the water temperature at the top of the inner container is higher, the temperature requirement of a user on hot water can be met, and the operation of the heating devices at the bottom and the top is not required to be controlled.

In this embodiment, the water heater is according to the setting temperature that the user corresponds at the custom water consumption of current time quantum confirms the water heater, compares with the setting temperature according to comparatively stable inner bag middle part temperature, when middle part temperature is less than or equal to the setting temperature, starts inner bag bottom heating device to heat up to the holistic water of inner bag.

In the technical scheme provided by the embodiment, the water heater acquires the water temperature of the middle part of the inner container, and the water temperature of the middle part is less than or equal to the set temperature, so that the heating device at the bottom of the inner container of the water heater is controlled to operate; when the water heater discharges water, the water temperature in the inner container of the water heater is reduced from bottom to top in sequence, if the water temperature in the middle of the inner container is smaller than or equal to a set temperature, the water temperature at the top of the inner container is low, namely the water outlet temperature of the water heater is low, the water heater controls the heating device at the bottom of the inner container to operate so as to integrally heat the water in the inner container, the temperature of the hot water output by the water heater is high under the condition that the water inlet flow is high or the bathing time of a user is long, and the shower effect of the water heater is good.

Referring to fig. 4, fig. 4 is a second embodiment of the control method of the water heater according to the present invention, and based on the first embodiment, after step S10, the method further includes:

and step S30, controlling the operation of the heating device on the top of the inner container when the water temperature in the middle part is determined to be higher than the set temperature and the water heater is determined to be in a water discharging state.

In this embodiment, when the water temperature in the middle of the inner container is higher 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 a water discharging state, the water heater outputs hot water, and the hot water is output by the water heater, so that cold water inevitably enters the inner container. In order to ensure that the water heater can stably output the water heater, the water heater can control the heating device at the top of the inner container to operate.

The water temperature in the middle of the inner container is higher than the set temperature, which indicates that the water temperature at the top of the inner container is also higher than the set temperature, and the hot water output by the water heater at the moment can meet the requirement of a user on the water temperature. However, as the hot water of the water heater is continuously output, the temperature of the output hot water is gradually reduced. Because the heating rate of the bottom heating device to the water on the top of the inner container is less than the heating rate of the top heating device to the top of the inner container, the operation of the top heating device can be controlled, the temperature of the hot water output by the water heater is higher, and the hot water meeting the temperature requirement of a user can be output by the water heater.

In the technical scheme provided by this embodiment, when the middle water temperature is greater than the set temperature, whether the user uses the water heater is judged, and if the user uses the water heater, the heating device at the top of the inner container is controlled to operate, so that the temperature of the hot water output by the water heater is higher, and the temperature requirement of the user on the hot water is met.

Referring to fig. 5, fig. 5 is a third embodiment of the control method of the water heater according to the present invention, and based on the second embodiment, the step S30 includes:

step S31, determining a temperature decrease amount of the water temperature at the middle of the detection period;

and step S32, determining that the water heater is in a water discharging state when the temperature reduction corresponding to a plurality of continuous detection periods is larger than the preset reduction.

In this embodiment, the water heater is provided with a detection period, and the duration of the detection period can be any suitable value. The water heater can acquire the water temperature collected by the temperature sensor in real time, so that the temperature reduction amount of the water temperature in the detection period is determined. The temperature sensor is not limited to the temperature sensor in the middle of the inner container, and can be a temperature sensor at the bottom of the inner container or a temperature sensor at the top of the inner container.

The water heater calculates the temperature reduction amount corresponding to each detection period, each detection period is continuous in time, and if the temperature reduction amount corresponding to the continuous detection periods is larger than the target reduction amount, the water heater can judge that the water heater is in a water discharging state, namely that a user is using the water heater. At the moment, the water heater can acquire the water consumption parameters of the water heater. The water usage parameter may be at least one of an inlet water temperature, an outlet water temperature, a hot water flow rate, a user's water usage, and a user's bathing temperature of the water heater. The water heater can determine the continuous number of the detection periods for judging that the water heater is in the water discharging state according to the duration of the detection periods. For example, when the duration of the detection period is long, the temperature decrease amounts corresponding to two continuous detection periods are both greater than the target decrease amount, and the water heater can be judged to be in the water discharge state; and when the time of the detection period is short, the temperature reduction amount corresponding to three or more detection periods is larger than the target reduction amount, and the water heater can be judged to be in the water discharge state. Referring to fig. 6, fig. 6 is a schematic diagram of temperature curves detected by each temperature sensor when the water heater discharges water, wherein 1 is a water temperature curve detected by the temperature sensor at the bottom of the inner container, 2 is a water temperature curve detected by the temperature sensor at the middle of the inner container, 3 is a water temperature curve detected at the top of the inner container, 4 is a water outlet temperature curve, 5 is a water inlet temperature curve, Δ T is a detection period, and Δ T is a temperature decrease amount of the water temperature detected by the bottom temperature sensor in a detection period. From the water temperature curves in fig. 4, it can be seen that the target decrease of the detection period corresponding to the bottom temperature sensor is the largest, the target decrease of the detection period corresponding to the middle temperature sensor is the next largest, and the target decrease of the detection period corresponding to the top temperature sensor is the smallest.

The longer the detection cycle that the water heater set up, the higher the precision of judging whether the water heater is in the state of draining, but the detection cycle length can make the water data of using that the water heater gathered inaccurate, for example, the detection cycle length can make the user use a period of time after, the user just can be judged to the water heater and use the water heater for the water heater can not gather the user's of previous period of time water consumption. When the detection period set by the water heater is shorter, the water heater needs to judge whether the temperature reduction amounts corresponding to more continuous detection periods are all larger than the preset reduction amount, so that the water heater needs to use a large amount of resources for judgment. Therefore, the water heater is accurate in acquired water consumption parameters and less in resource used for judgment by setting the duration of the detection period.

In the technical scheme provided by this embodiment, the water heater acquires the water temperature collected by the temperature sensor, and determines the temperature decrease of the water temperature in the detection period, and if the temperature decrease corresponding to a plurality of continuous detection periods is greater than the target decrease, it is determined that the water heater is in the water discharge state, and the determination accuracy of the water heater is high.

Referring to fig. 7, fig. 7 is a fourth embodiment of the control method of the water heater according to the present invention, and based on the second or third embodiment, after step S10, the method further includes:

step S40, when the water temperature in the middle part is determined to be higher than the set temperature and the water heater is determined to be in a water discharging state, the current maximum hot water output quantity of the water heater and the target water consumption quantity corresponding to the current time period of the user are obtained;

and step S50, when the maximum hot water output quantity is determined to be less than or equal to the target water consumption, controlling the operation of the heating device at the top of the inner container, or controlling the operation of the heating devices corresponding to the top and the bottom of the inner container.

In this embodiment, the water heater may determine the current maximum hot water output when the water heater is in the water discharge state. The water heater may determine that the user has a corresponding target water usage during the time period, which is indicative of the amount of hot water required by the user. The water heater judges whether the maximum hot water output is larger than the target water consumption,

when the maximum hot water output quantity is less than or equal to the target water consumption, the water heater cannot meet the hot water requirement of a user in the current time period, and accordingly, the water heater can control the top heating device which is used for heating water at the top of the liner to operate at a high heating rate, or control all the heating devices at the bottom of the liner and the top of the liner to operate, so that the hot water output quantity is increased, and the water heater can meet the hot water requirement 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 a mode of discharging water and not heating, that is, each heating device stops operating.

The maximum hot water output may be determined according to the inlet water temperature and the set temperature. Specifically, the water heater divides the water inlet temperature into N sections at 5-40 ℃, the water outlet temperature into N sections at 35-45 ℃, the set temperature is 35-80 ℃, the N sections are divided, and when the water outlet temperature is 35-45 ℃, hot water is output by the water heater; the output quantity of the water heater, which is the maximum hot water output quantity, is acquired when the water temperature is 35-45 ℃. The water heater constructs a mapping relation table according to the data relation among the maximum hot water output quantity, the inlet water temperature and the set temperature, and the maximum hot water output quantity can be found in the mapping relation table only 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 amount refers to a current set temperature corresponding to a current time period of the water heater.

In the technical scheme provided by this embodiment, when the water heater is in a water discharge state, the water heater determines the current maximum hot water output amount to compare the maximum hot water output amount with the target water consumption, and when the maximum hot water output amount is less than or equal to the target water consumption, the top heating device is controlled, or the top and bottom heating devices are controlled to operate, so that the hot water amount which can be currently output by the water heater meets the hot water demand of a user.

In one embodiment, the set temperature is not the user-set temperature, but is determined by the water heater based on the user's water demand for the current time period and the current inlet water temperature. Specifically, the water heater determines each same time period of a plurality of different dates in the data acquisition cycle, for example, the time period may be 9:00am to 10:00am every day in the data acquisition cycle, determines whether the user has water records in each time period, thereby counting the number of the time periods in which the water records exist, dividing the number by the total number of the time points to obtain a ratio, which may be defined as water reliability, determining the water level of the user from an interval in which the ratio exists, and finally determining the habitual water consumption of the user in the time period according to the water level.

For example, when the water consumption level is 1 grade or 2 grade, the water heater can accurately determine the target water consumption of the user in the time period. In contrast, the water heater divides the water consumption associated with each first time period into different water volume intervals, and takes the upper limit value of the water volume interval containing the most water consumption as the water consumption corresponding to the water reliability level 1 and the water reliability level 2.

When the water consumption level of the user in the first time period is 3 grades, the water consumption of the user in the time period is accurately determined by the water heater. In this regard, the maximum water usage of the user during the first time period may be used as the water usage corresponding to the water usage reliability level 3.

When the water consumption level of the user in the first time period is 4 grades, the water consumption of the user in the time period cannot be accurately determined by the water heater. And adding the preset water quantity to the water quantity corresponding to the water consumption grade 3, wherein the preset water quantity is the redundant quantity, and the water consumption corresponding to the water consumption grade 4 is obtained.

And when the water consumption level is 5, the water heater basically cannot determine the water consumption of the user in the first time period, but the user still has the possibility of water consumption, and therefore the water consumption corresponding to the water consumption level 5 can be obtained by adding the water consumption of the user corresponding to the water consumption level 4 to the preset water consumption.

When the water heater is not in the water discharging state, the habitual water consumption is the water consumption demand, and when the water heater is in the water discharging state, the water consumption demand is the difference between the habitual water consumption and the current output hot water quantity of the water heater.

The water demand represents the hot water amount required by a user in the current time period, the hot water amount, the water inlet temperature and the set temperature have a mapping relation, the water heater can determine the set temperature according to the water inlet temperature, the hot water amount and the mapping relation, and the lower the water inlet temperature is, the higher the set temperature is. It should be noted that, when the water heater is not in the water discharge state, that is, when the user does not use the water heater, the water inlet temperature is the water inlet temperature corresponding to the user using the water heater in the current time period; when the water heater is in a water discharging state, namely a user uses the water heater, the water inlet temperature is detected according to the second temperature sensor at the bottom of the inner container of the water heater.

In one embodiment, the water heater liner is provided with a plurality of heating devices. At the initial stage of water discharge of the water heater, the water temperature at the top is reduced to a small extent, if the heating device operates, the water temperature at the top is increased, and the heating device is cut off by the temperature limiter, so that the water heater stops operating, namely, the heat input to the top of the inner container is gradually reduced along with the continuous water discharge time increase of the water heater. In the initial stage of water discharge of the water heater, the temperature rise of the top water by the bottom heating device at the bottom of the inner container and the middle heating device in the middle of the inner container is limited, and the heat input to the top of the inner container is less, so that the water heater controls the top heating device with the maximum temperature rise rate to operate on the top water in the initial stage of water discharge so as to output more heat at the top of the inner container to the maximum extent. In contrast, when water outlet of the water heater is detected, determining a first target heating device according to the heating rate of each heating device to the water at the top of the liner, wherein the first target heating device at least comprises a heating device with the largest heating rate to the water at the top of the liner; and controlling the first target heating device to operate. The water heater is internally provided with a safe temperature, and when the water temperature at the top is lower than the safe temperature and the difference value between the water temperature at the top and the safe temperature is larger, a first target heating device consisting of a top heating device and a middle heating device which have larger heating rate to the water at the top can be controlled to operate; and when the temperature of the top water is lower than the safe temperature and the difference value between the temperature of the top water and the safe temperature is smaller, controlling the first target heating device consisting of the top heating device and the lower heating device with smaller heating rate to the top water to operate.

The safe temperature may be less than a corresponding limit temperature of the temperature limiter. After the first target heating device operates, the water heater acquires the current top water temperature of the inner container in real time, when the current top water temperature is higher than the safe temperature, the top water temperature is indicated to be too high, and if the first target heating device continues to operate, the temperature limiter can cut off the operation of the heating device.

In this regard, the water heater determines a second target heating device that heats the top water at a rate that is less than the rate at which the first target heating device heats the top water. When the first target heating means includes one of the middle heating means and the bottom heating means and the top heating means, the second target heating means includes the top heating means, or the second target heating means includes the middle heating means and the bottom heating means.

And after the second target heating device is determined, controlling the first target heating device to stop running, and controlling the second target heating device to run.

Furthermore, after the second target heating device operates for a period of time, if the current water temperature at the top is higher than the safe temperature, the water temperature at the top is indicated to be too high, and if the second target heating device continues to operate, the temperature limiter can cut off the operation of the heating device. In this regard, the water heater determines a third target heating device, the rate of temperature rise of the top water by the third target heating device being less than the rate of temperature rise of the top water by the second target heating device. The second target heating means may comprise a top heating means, or the second target heating means may comprise a middle heating means and a bottom heating means, and the third target heating means may comprise said bottom heating means. And after the third target heating device is determined, controlling the second target heating device to stop running, and controlling the second target heating device to run.

And by analogy, after the target heating device is switched to operate for a period of time, the current top water temperature is higher than the safe temperature, the current target heating device is switched to the next target heating device by the water heater, and the voiceprint rate of the next target heating device to the top water is smaller than the heating rate of the current target heating device to the water.

After the first target heating device is operated, the water heater can calculate the heat output by the water heater in unit time. The heat output in unit time is (water outlet temperature-water inlet temperature) flow rate specific heat capacity in unit time, wherein the flow rate refers to the flow rate of a water outlet pipe of the water heater, the water inlet temperature can be detected according to a temperature sensor at the bottom of the inner container, the water outlet temperature can be detected according to a temperature sensor at the top of the inner container, and 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 means per unit time. Specifically, the heat generated per unit time is the heating rate, the capacity of the top of the inner container is the specific heat capacity, and the coefficient per unit time, and the first target heating device heats the water at the middle part and the bottom part, so that the heat contributed to the top part by the first target heating device is less than the actual heat, that is, the coefficient is less than 1. When the heat generated by the first target heating device in unit time is equal to or less than the heat output by the water heater in unit time, the variation amplitude of the water temperature at the top part is small, at this time, the first target heating device can be controlled to continuously operate, when the heat generated by the first target heating device in unit time is greater than the heat output by the water heater in unit time, the water temperature at the top part tends to rise, if the duration time that the heat generated by the first target heating device in unit time is greater than the heat output by the water heater in unit time reaches the target time length, the water temperature at the top part is over-high, at this time, the first target heating device needs to be switched to the second target heating device.

In one embodiment, the water heater analyzes the water consumption law of the user by combining the water consumption parameters associated with each time period, and further realizes the intelligent function of the water heater according to the water consumption law. Specifically, the water heater determines a water demand corresponding to a current time period, wherein the water demand is determined according to water use reliability; determining a target set temperature of the water heater according to the water demand; and controlling the heating device of the water heater to operate according to the target set temperature.

Specifically, the water heater is provided with a data acquisition cycle, the time length of the data acquisition cycle can be one week, two weeks, three weeks and the like, when the water heater detects water outlet, namely when a user uses the water heater, water consumption parameters of the water heater can be acquired, the water consumption parameters comprise the hot water amount of the water heater used by the user, and the water heater and the time periods are stored in a related mode, so that a database of the water consumption parameters and the time periods corresponding to the data acquisition cycle is established. The water heater can determine the water demand of a user in any time period according to the database corresponding to the data acquisition cycle, wherein the time period refers to a certain time period of a day.

The water heater acquires each time period in the data acquisition cycle, wherein the dates of the time periods are different, for example, the data acquisition cycle is 7 days, and then the time periods [9:00 and 10:00] are 7 in total. The water heater determines the time period associated with the water usage parameter and counts the number of time periods, which may be considered the number of times the user has used water during that time period. The water heater calculates the ratio of the water consumption times to the total amount of the time periods, defines the ratio as the water consumption reliability, and determines the intervals where the water consumption reliability is located, and each interval corresponds to one water consumption. For example, the water heater divides the water usage reliability into a plurality of reliability intervals, for example, [ 100%, 85% ], (85%, 70% ], (75%, 55% ], (55%, 40% ], and (40%, 0% ] five intervals, each of the reliability intervals corresponds to a water usage class, e.g., [ 100%, 85% ] corresponds to a water usage class of 1 grade, (85%, 70% ] corresponds to a water usage class of 2 grade, (75%, 55% ] corresponds to a water usage class of 3 grade, (55%, 40% ] corresponds to a water usage class of 4 grade, (40%, 0% ] corresponds to a water usage class of 5 grade, it is understood that the higher the water usage reliability is, the lower the water usage class is, each water usage class has a corresponding water usage amount, the water heater, after determining the water usage reliability, determines the reliability interval in which the water usage reliability is located, and further determines the water usage class based on the reliability intervals, therefore, the water consumption corresponding to the water consumption grade is used as the water consumption demand.

When the water level is 1 level or 2 level, the water heater can accurately determine the target water consumption of the user in the time period. In contrast, the water heater divides the water consumption associated with each first time period into different water volume intervals, and takes the upper limit value of the water volume interval containing the most water consumption as the water consumption corresponding to the water reliability level 1 and the water reliability level 2.

When the water consumption level of the user in the first time period is 3 grades, the water consumption of the user in the time period is accurately determined by the water heater. In this regard, the maximum water usage of the user during the first time period may be used as the water usage corresponding to the water usage level 3.

The water heater can determine the water consumption demand of the user in the current time period according to the water consumption 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, namely after the water heater controls the heating device to operate through the target set temperature, the hot water provided by the water heater in the current time period is larger than or equal to the water demand of the user in the current time period. The water heater stores the mapping relation 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, in general, the water heater sets the inlet water temperature to be lower, and the inlet water temperature is regarded as a constant, so that the set temperature can be determined according to the water demand. However, in practical situations, the inlet water temperature of the water heater may be high, and if the water heater is at a set temperature determined according to the water demand, the amount of hot water that can be actually output by the water heater is greater than or far greater than the water demand of the user, which causes energy waste of the water heater.

The water heater is provided with a plurality of water discharging modes, wherein the water discharging modes comprise a water discharging non-heating mode, a water discharging heating mode, a capacity increasing mode and the like. The water heater has corresponding maximum hot water output in different discharge modes. Specifically, the water heater divides the water inlet temperature into N sections at 5-40 ℃, the water outlet temperature into N sections at 35-45 ℃, the set temperature is 35-80 ℃, the N sections are divided, and when the water outlet temperature is 35-45 ℃, hot water is output by the water heater; the water heater sets different inlet water temperatures and set temperatures in different heating modes, and acquires the output quantity of the outlet water temperature at 35-45 ℃, wherein the output quantity is the maximum hot water output quantity corresponding to the water discharging mode. The water heater constructs a mapping relation table according to the data relation among the maximum hot water output quantity, the water inlet temperature, the set temperature and the water discharging mode, and the maximum hot water output quantity can be found in the mapping relation table only according to the water discharging mode, the water inlet 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 amount refers to a current set temperature corresponding to a current time period of the water heater.

After the maximum hot water output quantity corresponding to each water discharging mode is determined, the water using demand and the maximum hot water output quantity are compared, and the water discharging mode corresponding to the maximum hot water output quantity larger than the water using demand is used as a target water discharging mode. And the water heater searches a set temperature in a mapping relation table according to the target water discharge mode, the maximum hot water output quantity corresponding to the target water discharge mode and the water inlet temperature, wherein the set temperature is the target set temperature.

The water discharging modes with the maximum hot water output quantity larger than the water demand of the user can be used as target water discharging modes, but when the difference value between the maximum hot water output quantity and the water demand is larger, the situation that the water heater provides more hot water and wastes more energy is shown. In contrast, the water heater firstly judges whether the water discharge mode with the smaller maximum hot water output is the target water discharge mode or not, and then judges whether the water discharge mode with the larger maximum hot water output is the target water discharge mode or not, so that the hot water provided by the water heater for users is not excessive.

And if so, taking the water discharging non-heating mode as a target water discharging mode.

If the maximum hot water output quantity corresponding to the water discharging non-heating mode is less than or equal to the water demand of the user, the water heater judges whether the maximum hot water output quantity corresponding to the water discharging heating mode is greater than the water demand, the maximum hot water output quantity corresponding to the water discharging heating mode is greater than the maximum hot water output quantity corresponding to the water discharging non-heating mode, and if the maximum hot water output quantity corresponding to the water discharging heating mode is greater than the water demand, the water discharging heating mode is taken as the target water discharging mode.

If the maximum hot water output corresponding to the water discharging heating mode is less than or equal to the water demand of a user, the water heater takes the capacity increasing mode as the target water discharging mode, the maximum hot water output corresponding to the capacity increasing mode is the maximum of the three water discharging modes, the capacity increasing mode refers to that the water heater collects other means to increase the hot water output, for example, the water heater is internally provided with a standby heating device, and the standby heating device is started when the water heater enters the capacity increasing mode.

When the water heater is in a water discharging state, namely the water heater is used by a user, a part of hot water is output by the water heater, and at the moment, the set temperature of the hot water needs to be determined again, so that the residual output hot water quantity of the water heater and the output hot water quantity are equal to or slightly larger than the water using demand of the user.

When the water heater is in a water discharging state, the output quantity of hot water in the water heater is detected in real time, the output quantity of the hot water is the quantity of the outputted hot water, the difference value between the water demand quantity and the outputted hot water quantity of the water heater is calculated, the difference value is the residual water consumption quantity, the water heater collects the water inlet temperature detected by a temperature sensor arranged at the bottom of the liner, the temperature is set according to the water inlet temperature, the residual water consumption quantity and the difference value of a target water discharging mode determined before the water heater in a mapping relation table, 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 energy waste of the water heater is less.

In one embodiment, the water heater analyzes the water consumption law of the user by combining the water consumption parameters associated with each time period, and further realizes the intelligent function of the water heater according to the water consumption law. For example, a water heater acquires a first water consumption parameter corresponding to a user in a first time period, wherein the first water consumption parameter comprises a first water amount and a first water temperature; determining a target advanced heating time length corresponding to the first time period of the water heater according to the first water parameter and the heating power of the water heater; and controlling the heating device of the water heater to operate according to the target advanced heating time length.

Specifically, the first water parameter includes a first water amount, and the first water parameter may also include a first water temperature, where the first water temperature is a temperature of hot water required by the user in the first time period, and the first water temperature may be determined according to a water usage habit temperature of the user 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 of the hot water, and the first water temperature can be 35-45 ℃. After the first water parameter is determined, the target set temperature of the water heater can be determined according to the first water parameter, namely after the water heater controls the heating device to operate through the target set temperature, the hot water provided by the water heater in the first time period is larger than or equal to the hot water amount of the user in the current time period. The water heater stores a mapping relation among the set temperature, the first water quantity and the first water temperature, so that the set temperature can be determined according to the first water quantity and the first water temperature. It should be noted that, in general, the water heater sets the inlet water temperature to be lower, and the inlet water temperature is regarded as a constant, so that 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 high, and if the water heater determines the set temperature according to the water consumption, the amount of hot water that can be actually output by the water heater is larger than the water consumption of a user, or is much larger than the water consumption of the user, which causes energy waste of the water heater.

Because the water heater is heated in advance, the water heater can be regarded as not entering water, and the water heater obtains the water temperature in the liner, and the water temperature can be the average water temperature in the liner. The bottom and the top of the inner container are provided with temperature sensors, the average value of the water temperatures detected by the two temperature sensors is the water temperature of the inner container, of course, the inner container can also be provided with a plurality of temperature sensors, and the average water temperature corresponding to the water temperatures collected by the plurality of temperature sensors is the water temperature of the inner container.

When the target set temperature, the heating rate of the heating device to water and the water temperature of the inner container are determined, the advance heating time of the water heater can be calculated, and the advance heating time can be set as the target advance heating time.

After the target advanced heating time length is calculated by the water heater, the water heater can obtain the starting time point of the heating device according to the starting time point of the first time period and the target advanced heating time length, and then the heating device is controlled to operate when the current time point reaches the starting time point. It should be noted that, a plurality of heating devices, for example, 2 or 3 heating devices, may be set in the water heater, and when the water heater is operated in advance, the water heater needs to control the operation of each heating device.

The water heater determines the heating advance time length corresponding to a first time period and a second time period, wherein the second time period is positioned after the first time period and is adjacent to the first time period in terms of time.

And the water heater calculates a third water consumption parameter corresponding to the first water consumption and the second time period, wherein the third water consumption parameter comprises the total water consumption of the first time period and the second time period or comprises the total water consumption and the water consumption temperature, the water consumption temperature is the water consumption temperature of the user in the first time period and the second time period, and the target advanced heating time corresponding to the first time period is determined according to the third water consumption parameter, so that the water heater can provide sufficient hot water for the user in both the first time period and the second time period.

And when the first interval duration is less than the second advanced heating duration, the user water usage in the second time period does not influence the user water usage in the first time period, and at the moment, the advanced heating duration corresponding to the first time period is taken as the target advanced heating duration.

When the first interval duration is longer than the advanced heating duration corresponding to the second time period, the water heater determines the target heating duration of the first time period according to the first water consumption parameter and the second water consumption parameter, that is, the target advanced heating duration of the second time period is actually the sum of the first interval duration and the target advanced heating duration corresponding to the first time period, and at this time, the target advanced heating duration of the second time period does not need to be repeatedly determined. In this regard, when the water heater determines the target advanced heating time period of the first time period, it is necessary to determine whether the water heater simultaneously determines the target advanced heating time period corresponding to a third time period before the first time period, the third time period being adjacent in time to the first time period. And if the second interval duration is longer than the first advanced heating duration, the water heater can be judged not to determine the target advanced heating duration of the first time period in advance, and the target advanced heating duration of the first time period needs to be determined. When the second interval duration is less than or equal to the first advanced heating duration, it can be determined that the water heater determines the target advanced heating duration of the first time period in advance, and the water heater can determine the target advanced heating duration corresponding to the first time period according to the target advanced heating duration of the third time period, that is, the target advanced heating duration of the third time period plus the second interval duration is the target advanced heating duration of the first time period.

In one embodiment, the water heater analyzes the water consumption law of the user by combining the water consumption parameters associated with each time period, and further realizes the intelligent function of the water heater according to the water consumption law. For example, the water heater determines the water use reliability corresponding to a user in a first time period, and determines a target water consumption according to the water use reliability; determining target operation parameters corresponding to the water heater according to the target water consumption; and controlling the water heater to operate according to the target operation parameter in the first time period, and/or controlling the water heater to operate before the first time period according to the target operation parameter.

Specifically, the water heater may determine a water usage reliability of the user over a time period, the water usage reliability indicating a probability that the user uses the water heater over the time period, the higher the water usage reliability, the greater the probability that the user uses the water heater over the time period. The water use reliability corresponding to the first time period can be determined according to the water use times of the user in the first time period, and the water use reliability is higher when the water use times are higher when the number of the first time periods on different dates is fixed. After the water use reliability is determined, the reliability interval where the water use reliability is located is determined, and then the water use grade is determined according to the reliability interval, so that the water use quantity corresponding to the water use grade is used as the target water use quantity.

The water heater is provided with a data acquisition period, and the duration of the data acquisition period can be the latest week, two weeks, three weeks or the like. The water heater determines the total number of the same first time periods on different dates in the data acquisition cycle, for example, when the time length of the data acquisition cycle is one week, then the data acquisition cycle has 7 first time periods from 9 am to 10 am, that is, the total number of the first time periods is 7. When the water heater detects that a user uses the water heater, the time period of using the water heater is related to the water consumption of the user, so that the number of the first time periods with water consumption is determined after the water heater obtains a plurality of first time periods.

The water heater may determine the water usage reliability based on the number of first time periods with water usage and the total number of first time periods. For example, the mapping relationship among the number of the first time periods, the total number of the first time periods, and the water usage reliability is stored in the water heater, and after the total number of the first time periods and the number of the first time periods with water are determined, the water usage reliability of the water heater can be determined according to the mapping relationship, the total number of the first time periods, and the number of the first time periods with water. The water heater calculates a first ratio between the number of first time periods having water usage and the total number of the first time periods, the first ratio being indicative of the frequency of water usage by the user during the first time period, the greater the first ratio, the higher the frequency of water usage by the user during the first time period. In this regard, the first ratio may be directly used as the water usage reliability to characterize the reliability of the user's water usage during the time period.

The water heater is divided into a plurality of time periods in one day, and after a user uses the water heater in a certain time period, the probability that the user uses hot water in the next time period is influenced. For example, if the user takes a bath at 8 pm to 9 pm and goes to sleep, then the probability of the user using water decreases from 9 pm to 10 pm, from 10 pm to 11 pm, and from 11 pm to 12 pm, so that the influence of the user using water in the time period before 9 pm to 10 pm needs to be considered when calculating 9 pm to 10 pm.

For this, the water heater determines a second time period earlier than the first time period, the date of the second time period is different from that of the first time period, the second time period comprises one or more sub-time periods, for example, when the first time period is 1:00am-2:00am, the second time period is 0:00am-1:00am, the second time period only contains one sub-time period, and the sub-time period is 0:00am-1:00 am; the first 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, 0:00am-1:00am, 1:00am-2:00am, 2:00am-3:00am, respectively.

The water heater calculates the total number of the sub-time periods in the data acquisition cycle and the number of the sub-time periods with water consumption, so that a second ratio is obtained according to the number of the sub-time periods with water consumption and the total number of the sub-time periods, and if the second time period comprises a plurality of sub-time periods, a plurality of second ratios exist.

And after the second ratio is obtained, setting corresponding weights for each sub-time period and the first time period. Since the influence of the earlier sub-period on the first period is smaller, the earlier sub-period has a smaller weight, i.e., the first period has the largest weight. And the water heater performs weighted calculation on each second ratio and the first ratio to obtain a target ratio, wherein the target ratio is the water use reliability of the user in the first time period.

The user has more historical water consumption times for the water heater in a certain time period, has less historical water consumption times for the water heater in another time period, and records the water consumption times of the user in one time period as the historical book consumption times, for example, the user has a difference in a certain week, so the water heater has no water consumption parameter of the week. At this time, when the water heater is used for calculating the water use reliability, the water use reliability of the user in the time period is inaccurate due to the difference of the user, that is, the water use reliability of the user in the time period is lower than the actual water use reliability.

In this regard, the water heater is provided with a plurality of data acquisition cycles, and the time lengths of the data acquisition cycles are different, for example, the time length is one week, the time length is two weeks, the time length is three weeks, and the like. The last day of the data acquisition cycle is the same day, and it can be understood that the data acquired in the data acquisition cycle is updated along with the lapse of time, for example, the data acquisition cycle has a time length of one week, if the date of the first time period is 6 months and 8 days, the day with the earliest time of the data acquisition cycle is 6 months and 1 #, and the schedule of the first time period is changed to 6 months and 9 #, the day with the earliest time of the data acquisition cycle is updated to 6 months and 2 #, that is, the water heater replaces the water consumption parameter acquired in 6 months and 9 # with the water consumption parameter acquired in 6 months and 1 #.

The water heater calculates the total number of the first time periods in each type of data acquisition period and the number of the first time periods with water, and the third ratio corresponding to the data acquisition period is obtained by dividing the number of the first time periods with water by the total number of the first time periods. Therefore, the water heater calculates to obtain a plurality of third ratios, and then the maximum third ratio is used as the water use reliability corresponding to the user in the first time period.

In one embodiment, the water heater analyzes the water consumption law of the user by combining the water consumption parameters associated with each time period, and further realizes the intelligent function of the water heater according to the water consumption law. For example, the water heater obtains a first total number of first time periods within a current data acquisition cycle, wherein each of the first time periods belongs to a different date; dividing the first total number of the first time period into a plurality of calculation sets according to different preset interval days; calculating a first water reliability of each calculation set; determining whether the current data acquisition cycle is valid according to the first water reliability of the plurality of calculation sets.

Specifically, the water heater can collect water consumption parameters of a user using the water heater and perform self-learning according to the water consumption parameters, so that the use law of the user on the water heater is analyzed, the use law is the water consumption law of the user, and the water consumption law means that the user needs to use water in a certain time period or does not need to use water in a certain time period.

If the fluctuation is large, it can indicate that the user does not have the water usage law in the time period, i.e. the data collection cycle is invalid in the time period.

Specifically, the water heater needs to first judge whether a certain time period in the data acquisition period is valid, if so, the water consumption fluctuation of the user in the time period is small, the data acquisition period is a user habit period, namely, the user has a water consumption rule in the time period; if the water consumption is invalid, the water consumption fluctuation of the user in the time period is large, and the water consumption law of the user in the time period is not good. Specifically, taking the time length of the data acquisition cycle as 7 days as an example, the water heater acquires first time periods of different dates in the data acquisition cycle, and the first total number of the first time periods is 7.

In this embodiment, the water heater may obtain a corresponding number of calculation sets by taking any two or more preset interval days from 1 day, 2 days, 3 days, 4 days, 5 days, and 6 days, i.e., the data acquisition cycle includes N first time periods, where the preset interval days K are different, and K is 1 day, 2 days, 3 days, 4 days, 5 days, and 6 days, i.e., the data acquisition cycle includes N first time periods, and for example, if the number of the preset interval days is 3, there are 3 calculation sets. And calculating the interval duration between the first time periods adjacent to the time in the set as preset interval days. For example, the data acquisition cycle is 7 days, the preset interval days are 1 day and 2 days respectively, then the calculation set corresponding to the preset interval days being 1 day includes 7 first time periods, and the calculation set corresponding to the preset interval days being 2 days includes 4 first time periods of 1, 3, 5, and 7. The more preset interval days are adopted, the higher the accuracy of whether the data acquisition period is effective or not is. In addition, the number of the first time periods in each calculation set can be limited, the number of the first time periods in the calculation sets is greater than or equal to a preset number, the situation that the number of samples in the calculation sets is too small to cause a large error is avoided, and the preset number can be any suitable number.

After the calculation sets are determined, the first water reliability of each calculation set is calculated, specifically, the second total number of the first time periods in the calculation sets and the number of the first time periods with water are determined, and the ratio obtained by dividing the number of the first time periods with water by the second total number is the first water reliability.

After determining the first water reliability corresponding to each calculation set, the water heater determines the maximum first water reliability to serve as a target water reliability, then sequentially calculates first difference values between the target water reliability and each other first water reliability, and takes the first difference values larger than a preset difference value as target difference values, so as to determine the number of the target difference values; the water heater calculates a first ratio of the number of the target difference values to the total number of the first difference values, if the first ratio is larger than a first preset threshold value, the first preset threshold value can be any suitable value, for example, 70%, the water use fluctuation of the user is in an acceptable range, namely, the fluctuation is normal, at this moment, the data acquisition period is judged to be effective, and the data acquisition period is a user habit period; if the first ratio is smaller than or equal to the first preset threshold, it indicates that the water consumption of the user is abnormal, and the data acquisition cycle is invalid, that is, the user has no water consumption regularity in the first time period of the data acquisition cycle.

It should be noted that a plurality of data acquisition cycles can be set in the water heater, the time length of each data acquisition cycle is different, and when the current data acquisition cycle is determined to be invalid, the next data acquisition cycle is used as the current data acquisition cycle until the valid data acquisition cycle is determined. Of course, if all data collection cycles are invalid, it indicates that the user has no water usage pattern for the first time period.

The water heater can calculate the range and the average value of the first water reliability of each calculation set, so that whether the water fluctuation of the user in the first time period is normal or not is determined according to the range and the average value, namely whether the data acquisition period is effective or not is judged.

Specifically, the maximum first water reliability and the minimum water reliability are extracted from the water heater to calculate a second difference, and then an average value corresponding to each first water reliability is calculated. The water heater then calculates a second ratio between the second difference and the average value, and determines whether the second ratio is less than or equal to a second preset threshold, where the second preset threshold may be any suitable value, such as 150%. When the second ratio is smaller than or equal to a second preset threshold, the water fluctuation of the user in the first time period can be judged to be normal, namely the data acquisition cycle is effective; and if the second ratio is larger than a second preset threshold value, the data acquisition period is invalid.

In one embodiment, the water heater analyzes the water consumption law of the user by combining the water consumption parameters associated with each time period, and further realizes the intelligent function of the water heater according to the water consumption law. For example, when the water heater determines that a user does not need water in a first time period, the water use reliability and the water inlet temperature corresponding to the first time period are obtained; and determining the target set temperature of the water heater according to the water use reliability and the inlet water temperature.

Specifically, the water heater determines a current water usage level corresponding to the water usage reliability, wherein the higher the water usage reliability is, the lower the current water usage level is; determining a temperature increment value according to the current water consumption level, wherein the lower the current water consumption level is, the smaller the temperature increment value is; and determining the target set temperature of the water heater according to the temperature increment value and the inlet water temperature.

If the current water consumption level is level 1, the accuracy that the user does not use the water heater in the first time period is very high, so that the target set temperature can be set to be the water inlet temperature, and the water inlet temperature is the historical water inlet temperature stored in the first time period by the water heater. If the current water consumption level is level 2, the accuracy that the user does not use the water heater is high, and at the moment, the target setting is set to be the inlet water temperature + the temperature increment value m. By analogy, when the current water consumption level is higher, the accuracy of judging that the water heater is not used by a user in a first time period by the water heater is lower, the target set temperature is higher, and the target set temperature can be determined by the following formula: the target set temperature is the intake water temperature + K temperature increment value, where K is 0, 1,2,3.

The invention also provides a water heater, wherein a temperature sensor is arranged in the middle of the inner container of the water heater, the water heater further comprises a memory, a processor and a control program of the water heater, the control program of the water heater is stored in the memory and can run on the processor, the temperature sensor is connected with the processor, and when the control program of the water heater is executed by the processor, the steps of the control method of the water heater in the embodiment are realized.

The present invention also provides a computer-readable storage medium storing a control program of a water heater, which when executed by a processor, implements the steps of the control method of the water heater according to the above embodiment.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The control method of the water heater is characterized in that heating devices are respectively arranged at the bottom and the top of an inner container of the water heater, and comprises the following steps:

acquiring the middle water temperature corresponding to the inner container;

and when the water temperature in the middle is determined to be less than or equal to the set temperature, controlling a heating device at the bottom of the inner container to operate, wherein the set temperature is determined by the habitual water consumption of a user in the current time period, the habitual water consumption is determined according to the water reliability of the user in the current time period, the water reliability is determined according to the total water consumption times of all historical time periods in a data acquisition cycle, which are the same as the current time period, and the water consumption times of the current time period, in addition, mapping relations exist among the habitual water consumption, the water inlet temperature and the set temperature, the set temperature is determined according to the water inlet temperature, the habitual water consumption and the mapping relations, and the lower the water inlet temperature is, the higher the set temperature.

2. The method for controlling a water heater according to claim 1, wherein the step of obtaining the temperature of the water at the middle portion of the inner container is followed by the steps of:

3. The method of controlling a water heater as set forth in claim 2, wherein said step of determining that the water heater is in a water discharge state includes:

determining a temperature decrease amount in a detection period according to the middle water temperature;

4. The method for controlling a water heater according to claim 1, wherein the step of obtaining the temperature of the water at the middle portion of the inner container is followed by the steps of:

when the water temperature in the middle part is determined to be higher than the set temperature, the water heater is determined to be in a water discharging state, and the current maximum hot water output quantity of the water heater and the target water consumption quantity corresponding to the current time period of the user are obtained;

5. A water heater, characterized in that a temperature sensor is arranged in the middle of the inner container of the water heater, the water heater further comprises a memory, a processor and a control program of the water heater stored in the memory and capable of running on the processor, the temperature sensor is connected with the processor, and the control program of the water heater realizes the steps of the control method of the water heater according to any one of claims 1-4 when being executed by the processor.

6. A computer-readable storage medium characterized in that it stores a control program of a water heater, which when executed by a processor implements the steps of the control method of the water heater according to any one of claims 1 to 4.