CN113834219A

CN113834219A - Heating control method and device of water heater and water heater

Info

Publication number: CN113834219A
Application number: CN202111136914.7A
Authority: CN
Inventors: 张裕兆
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-12-24
Anticipated expiration: 2041-09-27
Also published as: CN113834219B

Abstract

The invention discloses a heating control method, a control device and a water heater, wherein the heating control method comprises the following steps: acquiring the current ambient temperature, the current water temperature of the water heater, the current hot water quantity and the daily water consumption of a user in a first preset period; and when the current water temperature is lower than a first preset temperature and the daily water consumption is greater than the current hot water amount, controlling the water heater to heat according to the current environment temperature. Heating is controlled according to the change of daily water consumption, current temperature and ambient temperature, can make heat pump set realize automatic opening when suitable to reach the energy-conserving effect of preferred, the user need not oneself to set for the start heating time, effectively simplifies and sets for the operation, is favorable to improving user and uses experience.

Description

Heating control method and device of water heater and water heater

Technical Field

The invention relates to the technical field of electric appliances, in particular to a heating control method and a heating control device for a water heater, the water heater and a computer readable storage medium.

Background

In the related art, the heat pump water heater generally has a function of a timing switch, and the heat pump unit is started when the ambient temperature is high by setting the starting time so as to achieve the purpose of energy conservation. However, the method of setting the boot time requires the user to set the boot time, the setting process is relatively complex, and the unreasonable setting is likely to cause the energy saving effect to be not expected and may affect the use effect of the user.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a heating control method of a water heater, which can effectively reduce the operation difficulty set by a user and is beneficial to achieving better energy-saving effect and use experience of the water heater.

The invention also provides a control device, a water heater and a computer readable storage medium for executing the heating control method.

According to a heating control method of a water heater in an embodiment of a first aspect of the invention, the method comprises the following steps:

acquiring the current ambient temperature, the current water temperature of the water heater, the current hot water quantity and the daily water consumption of a user in a first preset period;

and when the current water temperature is lower than a first preset temperature and the daily water consumption is greater than the current hot water amount, controlling the water heater to heat according to the current environment temperature.

The control method of the water heater according to the embodiment of the invention at least has the following beneficial effects:

when satisfying current temperature and being less than first preset temperature and daily water consumption and being greater than current hot water volume, heat through current ambient temperature control water heater, control the heating according to daily water consumption, current temperature and ambient temperature's change like this, can make heat pump set realize automatic opening when suitable to reach the energy-conserving effect of preferred, the user need not oneself to set for the start heating time, effectively simplifies and sets for the operation, is favorable to improving user and uses experience.

According to some embodiments of the invention, the heating control method further comprises:

acquiring the ambient temperature of each time point in a second preset period, and generating an ambient temperature curve according to the ambient temperature, wherein the ambient temperature curve is an average value curve of the ambient temperatures corresponding to the same time point in the second preset period;

the control according to current ambient temperature the water heater heats, include:

and determining the heating time according to the current environment temperature and the environment temperature curve.

According to some embodiments of the invention, said determining a heating time from said current ambient temperature to said ambient temperature profile comprises:

calculating the heating time required for heating to a first state according to the current environment temperature;

calculating the minimum heating time required for heating to the first state according to the environment temperature curve, wherein the first state is that the current water temperature is more than or equal to the first preset temperature, or the current hot water amount is more than or equal to the daily water amount;

and when the difference value between the heating time and the minimum heating time is less than or equal to a preset time difference value, controlling the water heater to start heating.

According to some embodiments of the invention, the determining a heating time from the current ambient temperature and the ambient temperature profile further comprises:

determining a time period corresponding to the highest daily ambient temperature according to the ambient temperature curve;

the control the water heater starts heating, include:

controlling the heating time of the water heater to include at least the time period.

According to some embodiments of the invention, the obtaining the ambient temperature at each time point in the second preset period comprises:

and correcting the environmental temperature according to weather information, season information or region information.

and acquiring a daily water time period of a user in the first preset period, and controlling the water heater to finish heating before the daily water time period.

According to some embodiments of the invention, the obtaining the daily water time period of the user in the first preset period comprises:

when the water temperature of the water heater drops to exceed a second preset temperature within a first preset time, recording the starting time and the ending time of the change of the water temperature;

updating the water consumption time data in the first preset period according to the starting time and the ending time;

and determining the daily water time period according to the water time data.

According to some embodiments of the invention, the obtaining of the current ambient temperature, the current water temperature of the water heater, the current hot water amount and the daily water amount of the user in the first preset period comprises:

determining the starting hot water quantity of the water heater according to the starting time;

determining the residual hot water quantity of the water heater according to the end time;

obtaining the current water consumption according to the difference value between the starting hot water quantity and the residual hot water quantity, and updating the water consumption data in the first preset period;

and calculating the daily water consumption according to the water consumption data.

According to some embodiments of the present invention, the water heater includes a water tank, a first sensor and a second sensor, an upper portion of the water tank is provided with a water outlet, a lower portion of the water tank is provided with a water inlet, the first sensor is used for detecting a first water temperature at the upper portion of the water tank, and the second sensor is used for detecting a second water temperature at the lower portion of the water tank;

the heating control method further includes:

determining the current hot water proportion in the water tank according to the first water temperature and the second water temperature;

and calculating the current hot water quantity according to the hot water proportion and the volume of the water tank.

According to some embodiments of the invention, the determining a current hot water proportion in the tank from the first water temperature and the second water temperature comprises:

and determining the current hot water proportion according to a preset corresponding relation table of the first water temperature, the second water temperature and the hot water proportion.

and calculating the current water temperature according to the first water temperature and the second water temperature.

and when the current water temperature is greater than or equal to the first preset temperature or the current hot water amount is greater than or equal to the daily water amount, controlling the water heater to finish heating and enter a standby state.

According to some embodiments of the invention, before controlling the water heater to heat according to the current ambient temperature, the method further comprises:

and when the current water temperature is lower than a third preset temperature, setting the first preset temperature as the highest preset temperature of the water heater, wherein the third preset temperature is lower than the first preset temperature.

The control device according to the second aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the heating control method according to the first aspect of the present invention.

Since the control device adopts all the technical solutions of the control method of the above embodiment, at least all the advantages brought by the technical solutions of the above embodiments are achieved.

The water heater according to the third aspect embodiment of the invention comprises the control device as described in the second aspect embodiment. Since the water heater adopts all the technical solutions of the control device of the above embodiment, at least all the advantages brought by the technical solutions of the above embodiments are achieved.

A computer-readable storage medium according to an embodiment of the fourth aspect of the present invention stores computer-executable instructions, and is characterized in that the computer-executable instructions are used for executing the heating control method according to the embodiment of the first aspect.

Since the computer-readable storage medium adopts all the technical solutions of the heating control method of the above embodiments, at least all the advantages brought by the technical solutions of the above embodiments are achieved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a heat pump water heater according to an embodiment of the present invention;

FIG. 2 is a flow chart of a heating control method according to an embodiment of the present invention;

FIG. 3 is a flow chart of a heating control method according to another embodiment of the present invention;

FIG. 4 is a flow chart of acquiring a daily water time period according to an embodiment of the present invention;

FIG. 5 is a flow chart of acquiring domestic water usage according to one embodiment of the present invention;

FIG. 6 is a table showing a preset relationship between water temperature and hot water ratio according to an embodiment of the present invention;

FIG. 7 is a control flow diagram of a combination ambient temperature and ambient temperature curve according to one embodiment of the present invention;

FIG. 8 is a graph of an ambient temperature curve in accordance with an embodiment of the present invention;

FIG. 9 is a control flow diagram of another embodiment of the present invention incorporating an ambient temperature versus ambient temperature curve;

FIG. 10 is a detailed flow chart of a heating control method according to another embodiment of the present invention;

reference numerals:

a water heater 100; a host 110; a third sensor 111; a water tank 120; a water inlet 121; a water outlet 122; the first sensor 123; a second sensor 124; and a refrigerant inlet and outlet pipe 130.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, if there are first, second, etc. described, it is only for the purpose of distinguishing technical features, and it is not understood that relative importance is indicated or implied or that the number of indicated technical features is implicitly indicated or that the precedence of the indicated technical features is implicitly indicated.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly defined, terms such as arrangement, installation, connection and the like should be broadly understood, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the related art, the air energy water heater is also called a heat pump water heater, and the air energy water heater can absorb and transfer heat from ambient air to water by driving the compressor to operate, so that the higher the ambient temperature is, the higher the air energy conversion efficiency is, and the more electricity is saved. Therefore, the heat pump water heater usually has a function of a timing switch, and the heat pump is controlled to be started in a mode of setting the starting time when the ambient temperature is higher so as to achieve the purpose of energy conservation. However, the user needs to operate and set the starting time, the setting process is relatively complex and is influenced by seasonal climate and the like, the setting time of the user is not the optimal working time period, even unreasonable setting occurs, the energy-saving effect is not expected, and the using effect of the user may be influenced.

The embodiment of the invention provides a heating control method of a water heater, which is suitable for a heat pump water heater, can control the heating of the heat pump water heater according to the change of daily water consumption, water temperature and environment temperature, can enable a heat pump to be started at a proper time so as to achieve a better energy-saving effect, effectively simplifies the setting operation of a user, and is beneficial to improving the use experience of the user.

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the embodiments described below are some, but not all embodiments of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a heat pump water heater 100 according to an embodiment of the present invention, and the heat pump water heater includes a main unit 110 and a water tank 120, where the main unit 110 is provided with a compressor, an outdoor heat exchanger, a throttling element and other components (not shown in the drawings), and the outdoor heat exchanger is connected to a heat exchanger (not shown in the drawings) in the water tank 120 through a refrigerant inlet/outlet pipe 130 to form a heat pump unit. When the compressor operates, liquid refrigerant exchanges heat in the outdoor heat exchanger, heat energy is absorbed from air, gaseous refrigerant is compressed into high-temperature and high-pressure liquid state by the compressor, and then enters the heat exchanger in the water tank 120 to release heat, so that the heat is continuously and circularly heated, the heating effect is achieved, and the specific working principle is not repeated here.

The water tank 120 is provided with a water inlet 121, a water outlet 122, a first sensor 123 and a second sensor 124, the water inlet 121 is arranged at the lower part of the water tank 120, the water outlet 122 is arranged at the upper part of the water tank 120, the first sensor 123 is arranged close to the water outlet 122 for detecting the water temperature at the upper part of the water tank 120, and the second sensor 124 is arranged close to the water inlet 121 for detecting the water temperature at the lower part of the water tank 120. The host 110 is provided with a third sensor 111 and a control module, the third sensor 111 is connected with the control module, and the third sensor 111 is used for detecting the outdoor environment temperature. When the water heater works, cold water enters the water tank 120 from the water inlet 121 and flows out of the water tank 120 from the water outlet 122 after being heated, so that a user can use the water heater.

Referring to fig. 2, fig. 2 is a flowchart of a heating control method according to an embodiment of the present invention, where the heating control method is applied to the heat pump water heater 100 according to the above embodiment, and specifically includes, but is not limited to, the following steps:

step S100, acquiring the current ambient temperature, the current water temperature of the water heater, the current hot water quantity and the daily water consumption of a user in a first preset period;

and S200, controlling the water heater to heat according to the current environment temperature when the current water temperature is lower than a first preset temperature and the daily water consumption is greater than the current hot water consumption.

It can be understood that the user has certain water use habits in daily life, including water use time, water consumption, water use temperature, etc., for example, the user can utilize hot water to bathe in a certain time period every night, needs certain water consumption, and the use experience that can greatly reduced the user is not enough with the water consumption, and the control mode of using hot water while heating is also not favorable to energy-conservation. Therefore, the embodiment of the present invention can achieve a more effective energy saving effect by combining the water usage habit of the user with the ambient temperature as a condition for controlling the heating of the heat pump water heater 100.

Specifically, in some embodiments, the water usage habit data of the user is obtained, and the water usage habit data includes the daily water usage of the user in the first preset period, which can also be understood as the daily hot water usage of the user. For example, 30 days are used as a first preset period, and in the last 30 days, according to the water usage habit of the user, the average water usage amount per day is 60 liters, and then the obtained daily water usage amount is 60 liters, that is, the heat pump water heater 100 needs to heat at least 60 liters of hot water per day to meet the usage requirement of the user. It should be noted that the daily cold water consumption can not be counted into the daily water consumption range, and the description is omitted here.

Considering that the heat pump water heater 100 stores hot water in the water tank 120, the hot water is discharged from the water outlet 122 during water consumption, and cold water is supplied from the water inlet 121, and then the cold water is heated, so that the water in the water tank 120 can be maintained within a set temperature range. It can be understood that in case of satisfying the daily water consumption of the user, the current hot water amount in the water tank 120 needs to be more than the daily water amount.

It should be noted that the current hot water amount is understood as the volume occupied by the hot water in the water tank 120, taking the water tank 120 with a volume of 100 liters as an example, the water with a water temperature of more than 38 ℃ is the hot water, and when all the water in the water tank 120 is the hot water, the current hot water amount is 100 liters; after 40 liters of hot water is used, the water tank 120 is supplemented with cold water with a corresponding volume, and at this time, although 100 liters of water is kept in the water tank 120, the current hot water volume is reduced to 60 liters, the current hot water volume can also be understood by the proportion of the hot water, and the hot water proportion is 60 percent when the current hot water volume is 60 liters. In the embodiment, the volume of the hot water in the water tank 120 may be determined by detecting the temperature of the water in the water tank 120 by the first sensor 123 and the second sensor 124, so as to obtain the current amount of the hot water in the water tank 120.

It can be understood that, for the user, besides the daily usage of hot water, the water temperature also meets the requirement of the set temperature, otherwise the use experience is greatly reduced. Therefore, the heating control method of the embodiment further needs to obtain the current water temperature, where the current water temperature is the temperature of the water in the current water tank 120, and compare the current water temperature with the first preset temperature to determine whether the water temperature meets the requirement of the water temperature, for example, the first preset temperature may be 40 ℃ or 45 ℃, and the user may manually set the first preset temperature or automatically adjust the first preset temperature according to the water usage habit of the user, the ambient temperature, and the like.

When present temperature is less than first preset temperature, and the daily water consumption is greater than current hot water volume, heat according to current ambient temperature control water heater 100, that is to say, when present temperature and current hot water volume do not all satisfy corresponding condition, just judge according to current ambient temperature's change whether open the heating, otherwise the unit keeps standby state, can control heat pump set like this and open when suitable, in order to reach the energy-conserving effect of preferred, when satisfying the water, avoid the waste that repeated heating etc. caused.

It should be noted that the daily water consumption of the user can be obtained by a machine learning mode, and the water consumption time, the water consumption and the like of the user can be recorded to determine the water consumption habit of the user, for example, the data of the daily water consumption is obtained by deep learning calculation in combination with the water consumption habit of the user in the past 30 days, and the manual setting of the user is not needed; and current ambient temperature, current hot water volume all can obtain through corresponding data acquisition, judge heat pump set's start time according to the change of daily water consumption, current temperature and ambient temperature, realize automated control, the user need not oneself to set for start time, effectively simplifies and sets for the operation, is favorable to improving user and uses the experience.

It can be understood that the current ambient temperature changes with the passage of time, and since the heat pump unit has high heating efficiency under the condition of higher ambient temperature, which is beneficial to power saving, the water heater 100 is controlled to heat according to the current ambient temperature, which can be understood as controlling the water heater 100 to start up for heating in the time period of higher ambient temperature, and the time period of higher temperature is more suitable for starting up for operation, so that the energy efficiency of the heat pump unit can be improved, and more power and energy can be saved. Generally, the ambient temperature during the midday time period of the day is relatively high, and the heating efficiency is also high, for example, the ambient temperature during the time period from 12 pm to 2 pm is the highest, and is suitable for the start-up heating, which can be understood as the optimal start-up time period, which can be more beneficial to quicken the generation of the hot water required by the user.

Referring to fig. 3, the heating control method includes, but is not limited to, the following steps:

step S200, when the current water temperature is lower than a first preset temperature and the daily water consumption is greater than the current hot water consumption, controlling a water heater to heat according to the current environment temperature;

and step S300, acquiring a daily water time period of the user in a first preset period, and controlling the water heater to finish heating before the daily water time period.

It can be understood that the daily water use time period of the user can be calculated according to the water use habit of the user, and the daily water use time period can be understood as the daily water use time period of the user, and the daily water use time period of the user can be determined by recording the time when the user starts to use water and the time when the user finishes using water in a certain period. For example, as can be seen from the water consumption record of the user for the last 30 days, the user needs to use hot water for a period of time ranging from 7 to 9 o' clock each night, and the water consumption is 80 liters. Therefore, the control method of the embodiment controls the water heater 100 to heat at least 80 liters of hot water, and the heating time period is controlled before the daily water time period of the user, that is, the heating of the hot water needs to be completed in advance, so that the heating condition in the water time period is reduced, and the use experience of the user is further improved.

In order to obtain effective water consumption data in consideration of uncertainty of water consumption of a user each time, in some embodiments, in step S300, a daily water usage period of the user in a first preset period is obtained, as shown in fig. 4, which specifically includes the following steps:

s310, when the water temperature of the water heater drops to exceed a second preset temperature within a first preset time, recording the starting time and the ending time of the change of the water temperature;

s320, updating water consumption time data in a first preset period according to the starting time and the ending time;

and S330, determining the daily water time period according to the water time data.

It can be understood that the embodiment distinguishes by judging whether the water is effectively used, and specifically, the change of the water temperature in the water tank 120 can be detected by the first sensor 123 or the second sensor 124, and when the temperature drops to exceed the second preset temperature in the first preset time, the water is considered as the effective water for the user; otherwise, the user is considered to have no water, for example, the water temperature sensed by the first sensor 123 drops by more than 5 ℃ in 10 minutes, and then the user is considered to have effective water usage; if the sensed water temperature does not drop more than 1 ℃ within 10 minutes, the user is deemed to have no water usage.

When the user effectively uses water, the starting time and the ending time of the water temperature change are recorded, the water use time data in the first preset period are updated, namely the daily water use time is recorded, so that the daily water use time period can be determined according to the water use time data, namely the daily water use time period of the user is obtained. And in case that it is determined that the user does not use water, the time for the water temperature change is negligible. It should be noted that the water usage time data of the user is continuously updated at a certain period, for example, the water usage time period and the water usage duration that the user is accustomed to can be analyzed by updating iteration at a period of 30 days. When the user uses the water heater 100 for the first time, the system defaults to the water using time period and then corrects the water using time period according to the actual water using condition.

It should be noted that, in order to obtain the water consumption data more accurately, the embodiment determines the water consumption by reducing the amount of hot water in the water tank 120 in the water consumption period, considering that the water consumption of the user in the water consumption period is not necessarily uniform. Referring to fig. 5, the process of acquiring the daily water consumption specifically includes the following steps:

s410, determining the starting hot water quantity of the water heater according to the starting time, and determining the residual hot water quantity of the water heater according to the ending time;

s420, obtaining the current water consumption according to the difference value between the starting hot water quantity and the residual hot water quantity, and updating the water consumption data in a first preset period;

and S430, calculating the daily water consumption according to the water consumption data.

It is understood that the daily water consumption is the sum of the water consumption of all the water consumption time of the day, and the daily water consumption can be calculated according to the water consumption data by updating the daily water consumption data in the first preset period, and the calculation method can be an average algorithm or a weighted average algorithm, for example, if the daily average water consumption of the user in the last 10 days is 50 liters, the daily water consumption can be set to 50 liters.

When a user uses water, cold water enters the water tank 120 through the water inlet 121 and flows out of the water tank 120 through the water outlet 122 after heating, it can be understood that the water in the water tank 120 may have a higher water temperature at the upper part and a lower water temperature at the lower part, that is, the water temperature in the water tank 120 is not uniformly distributed. In the embodiment, the amount of hot water in the water tank 120 can be determined by the temperature of the water detected by the first sensor 123 and the second sensor 124. It can be understood that the higher the detected water temperature is, the higher the proportion of hot water is, and based on this, the first sensor 123 detects that the water temperature at the upper part of the water tank 120 is the first water temperature, the second sensor 124 detects that the water temperature at the lower part of the water tank 120 is the second water temperature, and the current hot water proportion in the water tank 120 is determined according to the first water temperature and the second water temperature, so that the current hot water amount can be calculated by using the hot water proportion and the volume of the water tank 120.

Referring to fig. 6, fig. 6 is a table showing a preset correspondence relationship between the first water temperature, the second water temperature and the hot water ratio, where T5U represents the first water temperature and T5L represents the second water temperature, and the corresponding hot water ratio can be found in the table according to the temperature range between the first water temperature and the second water temperature, for example, when T5U is equal to 40 ℃ and T5L is equal to 38 ℃, the hot water ratio in the water tank 120 is 75%; when both T5U and T5L are below 38 ℃, the ratio of hot water in the water tank 120 is 0, i.e. all cold water in the water tank 120 is at this time.

The corresponding hot water ratio is determined by fig. 6, and the hot water volume in the water tank 120 can be calculated according to the physical volume of the water tank 120 and the hot water ratio. The user's starting hot water amount at the water use starting time is L1 ═ 1 ═ L × current hot water ratio, and the user's remaining hot water amount at the water use ending time is L2 ═ L × current hot water ratio, where L is the physical volume of the water tank 120. In this way, the starting hot water amount and the remaining hot water amount can be calculated, the actual hot water usage amount of the user at this time is L3-L1-L2, and the data is updated in the first preset period, so that the daily hot water usage amount L3a of the user can be calculated.

It should be noted that, in the embodiment, the current water temperature may be calculated according to the first water temperature and the second water temperature, where the current water temperature is T0 ═ T5L + T5U)/2, and the current water temperature is compared with the first preset temperature to determine whether the water temperature meets the requirement of the water temperature, and when (T5L + T5U)/2 < T- Δ T1 is met, it may be considered that the water temperature meets the requirement of the set temperature of the user, where T is the first preset temperature, and Δ T1 is a correction temperature difference, and by increasing the correction temperature difference, fluctuation of the control process around the first preset temperature may be reduced, and frequent heating may be reduced.

Referring to FIG. 7, in some embodiments, a heating control method includes, but is not limited to, the following steps:

step S510, acquiring the ambient temperature of each time point in a second preset period, and generating an ambient temperature curve according to the ambient temperature;

and S520, when the current water temperature is lower than a first preset temperature and the daily water consumption is greater than the current hot water consumption, determining the heating time according to the current ambient temperature and ambient temperature curve.

Considering that the environment temperature is easily affected by climate and regions, the optimal startup time period may also change, and the startup time controlled according to the current environment temperature may deviate from the optimal startup time period, so the embodiment generates the environment temperature curve according to the historical environment temperature, and determines the startup heating time of the water heater 100 by combining the current environment temperature and the environment temperature curve, which is more beneficial to meeting the requirement of startup heating in the optimal startup time period.

Specifically, in the embodiment, the ambient temperature is detected by the third sensor 111 on the host 110, and the ambient temperature at each time point is collected in a second preset period, where the second preset period may be 10 days, 20 days, 30 days, and the like, and 24 hours a day is used as a reference time period. Taking 10 days as an example, the environmental temperature data is recorded every other hour every day, an environmental temperature curve is generated according to the acquired environmental temperature data within 10 days, and the change of the environmental temperature can be reflected more accurately through the environmental temperature curve.

Referring to fig. 8, fig. 8 is a graph of an environment temperature curve according to an embodiment, in which an abscissa represents different time points, an ordinate represents different environment temperatures, and an environment temperature corresponding to each time point is an average value of environment temperatures corresponding to the same time point on different dates within a second preset period, that is, the environment temperature curve may be understood as an average value curve of environment temperatures corresponding to the same time point within the second preset period.

It should be noted that the ambient temperature curve may be updated daily, and the updating is performed within a certain period, for example, the recording period of the ambient temperature curve is 1,2 … … X days, after the data source of the X +1 th day is completed, the data of the first day is replaced, and so on, X ≧ 1, so as to ensure that the ambient temperature curve can more accurately represent the recent ambient temperature change.

In addition, the ambient temperature curve may be updated according to local weather information, for example, the ambient temperature curve may be corrected by acquiring weather forecast to know that the ambient temperature is decreased in the day. The environmental temperature curve can be corrected by adding season information and region information, for example, the environmental temperature curve can be set according to the season information or the region information when leaving a factory, and the environmental temperature change of different regions and different seasons can be reflected accurately according to the combination of the preset season information or the region information and the acquired environmental temperature data, and if the environmental temperature of the region in one day is low, the use requirement can be met by controlling to start heating in advance or prolong the heating time and the like. Of course, the seasonal information or the regional information may also be corrected by the actual measurement results during the product application process, that is, the seasonal information or the regional information may be updated, which is more favorable for improving the accuracy of the control.

Referring to fig. 9, in some embodiments, in the step S520, the current ambient temperature is combined with the ambient temperature curve to determine the boot-up time, which includes, but is not limited to, the following steps:

step S521, calculating the heating time required for heating to the first state according to the current environment temperature;

step S522, calculating the minimum heating time required for heating to the first state according to the environment temperature curve;

step S523, when the difference between the heating time and the minimum heating time is less than or equal to the preset time difference, controlling the water heater to start heating.

It should be noted that, in the embodiment, when the current water temperature is lower than the first preset temperature and the daily water consumption is greater than the current hot water consumption, the startup time is controlled according to the current ambient temperature and ambient temperature curve. It can be understood that the water temperature of the water tank 120 will gradually increase after the heating is started, and the proportion of the hot water quantity will also gradually increase. When the current water temperature is greater than or equal to the first preset temperature, the water heater 100 can be controlled to finish heating; the energy-saving water heater can also meet the requirements that when the current hot water amount is more than or equal to the daily water amount, the control unit finishes heating and enters a standby state, namely when the current water temperature and the current hot water amount meet one of the conditions, the use requirements of users can be met, the heating can be finished under the control, the unit enters the standby state, the energy consumption is reduced, the energy-saving effect is further improved, the water for the users can be met, and the waste caused by repeated heating and the like can be avoided.

In the embodiment, a state that the current water temperature is equal to or higher than the first preset temperature or the current hot water amount is equal to or higher than the daily water amount is regarded as the first state, and a state that the current water temperature is lower than the first preset temperature and the daily water amount is higher than the current hot water amount is regarded as the second state. And in the second state, the starting time is determined according to the current environment temperature and the environment temperature curve, and the heating is stopped after the first state is reached.

Taking the hot water amount as an example, the daily hot water usage amount of the user is L3a, the real-time hot water amount of the water tank 120 is Ls, the control module calculates the hot water amount required to be heated as L3a-Ls +. DELTA.L, and the heating time required to generate the same hot water amount at the current ambient temperature is calculated as ta in combination with the heating capacity of the host 110. And calculating the minimum heating time tb according to the ambient temperature curve, the amount of hot water to be heated equal to L3a-Ls +. DELTA.L and the heating capacity of the main unit 110. Wherein, Δ L is a volume compensation amount, and the amount of hot water to be heated can be increased by setting the volume compensation amount, so that the amount of hot water in the water tank 120 is larger than the daily water consumption.

It is understood that the maximum ambient temperature at which heating is most efficient can be obtained by the ambient temperature curve, and therefore the minimum heating time tb is calculated based on the maximum ambient temperature, and the minimum heating time tb includes at least a time period corresponding to the maximum ambient temperature. The heating time ta and the minimum heating time tb have a difference value, and whether the start of heating is controlled or not is judged by comparing the difference value with a preset time difference value, so that the starting heating time can be determined.

Referring to fig. 8, tc is a time period of the domestic water, the smaller the difference between the heating time ta and the minimum heating time tb is, the closer the time point corresponding to the current ambient temperature is to the time point corresponding to the highest ambient temperature is, and when the difference is less than or equal to the preset time difference, the start-up is controlled to perform heating, so that the start-up operation can be selected in the time period with higher efficiency, and a better energy-saving effect is achieved.

It can be understood that when the difference between the heating time ta and the minimum heating time tb is 0, the current ambient temperature is in the most appropriate heating time period, the heating efficiency is the highest, and the energy efficiency of the unit is effectively improved. On the contrary, the larger the difference between the heating time ta and the minimum heating time tb is, the longer the time point corresponding to the current ambient temperature is from the time point corresponding to the highest ambient temperature, and when the difference between the heating time ta and the minimum heating time tb is greater than the preset time difference, the current ambient temperature is not suitable for startup heating, and at this time, the unit is kept in a standby state until the time period suitable for startup heating, so that the occurrence of repeated heating and the like can be effectively reduced, and the optimal energy-saving effect and the user experience can be achieved. In an embodiment, the preset time difference may be set to be in a range of 0.5 to 3 hours, and is specifically set according to an actual application scenario.

It should be noted that, in the case that the proportion of the hot water in the water tank 120 is low, the first preset temperature T may be set to the maximum preset temperature Tmax of the water heater 100, which facilitates to increase the water temperature to the required water temperature and to accelerate the generation of the required amount of the hot water. In addition, when the water heater 100 is first powered on, the control unit starts to operate.

The control flow of the above embodiment is explained below with specific examples.

Referring to fig. 10, a heating control method of an embodiment includes the steps of:

step S610, judging whether (T5L + T5U)/2 < T-delta T1 is met, if yes, executing step S620, otherwise, the unit is in standby;

step S620, determining whether to start up for the first time, if so, executing step S680, otherwise, executing step S630;

step S630, judging whether T5L < 38 ℃ and T5U < 38 ℃ are met, if yes, executing step S640, otherwise executing step S660;

step S640, determining whether the first preset temperature T is equal to the maximum preset temperature Tmax, if yes, performing step S660, otherwise, performing step S650;

step S650, setting the first preset temperature T as the highest preset temperature Tmax, and executing step S660;

step S660, judging whether L3a is greater than Ls +. DELTA.L, if yes, executing step S670, otherwise, the unit is in standby;

step S670, judging whether delta t is less than 1 hour, if yes, executing step S680, otherwise, the unit is standby;

step S680, the unit operates;

step S690, judging whether Ls is more than or equal to L3a plus delta L or (T5U + T5L)/2 is more than or equal to T-delta T1, if yes, executing step S700, otherwise, continuing to operate;

in step S700, the device stands by and the determination in step S610 is repeated.

In addition, an embodiment of the present invention also provides a control apparatus including: a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor and memory may be connected by a bus or other means.

The memory, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and these remote memories may be connected to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The non-transitory software programs and instructions required to implement the heating control method of the above-described embodiment are stored in the memory, and when executed by the processor, perform the heating control method of the above-described embodiment, for example, perform the above-described method steps S100 to S200 in fig. 2, method steps S100 to S300 in fig. 3, method steps S310 to S330 in fig. 4, method steps S410 to S430 in fig. 5, method steps S510 to S520 in fig. 7, method steps S521 to S523 in fig. 9, and method steps S610 to S690 in fig. 10.

The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

In addition, an embodiment of the invention also provides a water heater 100 which comprises the control device of the embodiment. Since the water heater 100 adopts all the technical solutions of the control device of the above embodiment, at least all the advantages brought by the technical solutions of the above embodiments are achieved.

Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, which are executed by a processor or a controller, for example, by a processor in the embodiment of the water heater 100, and can enable the processor to execute the heating control method of the water heater 100 in the embodiment, for example, the method steps S100 to S200 in fig. 2, the method steps S100 to S300 in fig. 3, the method steps S310 to S330 in fig. 4, the method steps S410 to S430 in fig. 5, the method steps S510 to S520 in fig. 7, the method steps S521 to S523 in fig. 9, and the method steps S610 to S690 in fig. 10, which are described above.

One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A heating control method for a water heater, comprising:

2. The heating control method according to claim 1, characterized by further comprising:

3. The heating control method according to claim 2, wherein the determining a heating time according to the current ambient temperature and the ambient temperature profile includes:

4. The heating control method according to claim 3, wherein the determining a heating time according to the current ambient temperature and the ambient temperature profile further comprises:

the control the water heater starts heating, include:

5. The heating control method according to claim 2, wherein the acquiring the ambient temperature at each time point in the second preset period includes:

6. The heating control method according to claim 1, characterized by further comprising:

7. The heating control method according to claim 6, wherein the acquiring the daily water time period of the user in the first preset period comprises:

and determining the daily water time period according to the water time data.

8. The heating control method according to claim 7, wherein the obtaining of the current ambient temperature, the current water temperature of the water heater, the current hot water amount and the daily water amount of the user in the first preset period comprises:

9. The heating control method according to claim 1, wherein the water heater comprises a water tank, a first sensor and a second sensor, wherein an upper portion of the water tank is provided with a water outlet, a lower portion of the water tank is provided with a water inlet, the first sensor is used for detecting a first water temperature at the upper portion of the water tank, and the second sensor is used for detecting a second water temperature at the lower portion of the water tank;

the heating control method further includes:

10. The heating control method according to claim 9, wherein the determining a current hot water proportion in the tank based on the first water temperature and the second water temperature comprises:

11. The heating control method according to claim 9, wherein the obtaining of the current ambient temperature, the current water temperature of the water heater, the current hot water amount, and the daily water amount of the user in the first preset period comprises:

12. The heating control method according to claim 1, characterized by further comprising:

13. The heating control method according to claim 1, wherein before controlling the water heater to heat according to the current ambient temperature, the method further comprises:

14. A control device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the heating control method of the water heater according to any one of claims 1 to 13 when executing the computer program.

15. A water heater comprising the control device of claim 14.

16. A computer-readable storage medium storing computer-executable instructions for performing the heating control method of the water heater according to any one of claims 1 to 13.