CN115978804A

CN115978804A - Control method and control device for heating device, and heating device

Info

Publication number: CN115978804A
Application number: CN202211675182.3A
Authority: CN
Inventors: 刘书峰; 陈涛; 胡玉婷
Original assignee: AO Smith China Water Heater Co Ltd
Current assignee: AO Smith China Water Heater Co Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-04-18

Abstract

The embodiment of the application discloses a control method of a heating device, the control device and the heating device, wherein the heating device comprises a heating unit, and the control method comprises the following steps: s1, after the heating of the heating unit is completed, acquiring a first water supply condition of the heating device; s2, determining first power of the heating unit according to the first water supply condition, and taking the first power as initial power of the heating unit for heating next time; s3, controlling the heating unit to heat at the first power when the heating unit is started next time; and S4, acquiring a second water supply condition of the heating device in the heating period of the heating unit, determining a second power of the heating unit according to the second water supply condition, and controlling the heating unit to heat at the second power. Therefore, the frequent starting and stopping of the unit can be effectively reduced while the stable hot water supply is ensured, and the energy consumption is reduced.

Description

Control method and control device for heating device, and heating device

Technical Field

The embodiment of the application relates to the field of heating device control, in particular to a control method and a control device of a heating device and the heating device.

Background

The commercial heating device can supply hot water and is generally used in occasions such as hotels, bath centers, hospitals, homes and the like. Most of the current commercial heating devices adopt a water storage type heating mode, and when the water temperature is lower than a set temperature, the commercial heating devices are usually heated by fixed power.

It should be noted that the above background description is provided only for the sake of clarity and complete description of the technical solutions of the present application, and for the sake of understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

Disclosure of Invention

In the related technology, the situation of user water consumption in the heating process is not considered, and the heating process is usually carried out at a fixed power, so that the heating start and stop of the unit are more frequent, and the heat loss is more.

In view of at least one of the above problems, embodiments of the present application provide a control method and a control device for a heating device, and a heating device.

The specific technical scheme of the embodiment of the application is as follows:

according to a first aspect of embodiments of the present application, there is provided a control method of a heating apparatus including a heating unit for heating water and for supplying hot water, the method including:

s1, after the heating of the heating unit is completed, acquiring a first water supply condition of the heating device;

s2, determining first power of the heating unit according to the first water supply condition, and taking the first power as initial power of the heating unit for heating next time;

s3, controlling the heating unit to heat at the first power when the heating unit is started next time;

and S4, acquiring a second water supply condition of the heating device in the heating period of the heating unit, determining a second power of the heating unit according to the second water supply condition, and controlling the heating unit to heat at the second power.

According to a second aspect of embodiments herein, there is provided a control apparatus comprising a processor configured as a control method of the heating apparatus of the first aspect.

According to a third aspect of embodiments herein, there is provided a heating apparatus comprising the control apparatus of the second aspect.

One of the beneficial effects of the embodiment of the application lies in: the heating power during the next starting can be determined according to the user water consumption condition in the standby process of the heating device, and in addition, the heating power in the heating process can be adjusted in real time according to the user water consumption condition in the heating process of the heating device, so that the frequent starting and stopping of the unit can be effectively reduced while the stable hot water supply can be ensured, and the energy consumption is reduced.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation.

FIG. 1 is a schematic view of a control method of a heating apparatus according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating an implementation manner of step S4 in the embodiment of the present application;

FIG. 3 is a schematic diagram illustrating a control method of a heating apparatus according to an embodiment of the present application;

FIG. 4 is a schematic view of a control device according to an embodiment of the present application;

fig. 5 is a schematic view of the heating device in the embodiment of the present application.

Detailed Description

While the invention will be described in detail with reference to the drawings and specific embodiments, it is to be understood that these embodiments are merely illustrative of the invention and are not to be construed as limiting the scope of the invention, which is defined in the appended claims, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein by those skilled in the art.

In the embodiments of the present application, the terms "first", "second", and the like are used for distinguishing different elements by reference, but do not denote a spatial arrangement, a temporal order, or the like of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Embodiments of the first aspect

An embodiment of the first aspect of the present application provides a control method of a heating apparatus, the heating apparatus includes a heating unit, the heating unit is used for heating water, the heating apparatus is used for supplying hot water, fig. 1 is a schematic diagram of a control method of the heating apparatus of the embodiment of the present application, as shown in fig. 1, the control method includes:

101, step S1, obtaining a first water supply condition of the heating device after the heating unit finishes heating;

102, determining a first power of the heating unit according to the first water supply condition, and taking the first power as a starting power of the heating unit for heating next time;

103, step S3, when the heating unit is started next time, controlling the heating unit to heat at the first power;

104, step S4, obtaining a second water supply condition of the heating device during the heating period of the heating unit, determining a second power of the heating unit according to the second water supply condition, and controlling the heating unit to heat at the second power.

In some embodiments, the heating device may be an electric water heater or a gas water heater. For example, when the heating device is an electric water heater, the heating device comprises a water tank and a plurality of (hereinafter referred to as X) heating units located in the water tank, wherein X is an integer not less than 2, and the heating units are heated and generate heat by supplying power to the heating units, so that a heating function can be realized, for example, the heating units are heating rods, and the plurality of heating rods have the same power and constant power. For example, when the heating device is a gas water heater, the heating device comprises a water tank and a heating unit (comprising a burner and a gas valve) and the like, the gas valve controls the gas flow entering the burner, the heat is transferred to cold water in the water tank in a combustion heating mode, the water temperature is increased, and therefore the heating function can be achieved.

In some embodiments, the heating unit of the heating device may be in a heating state (also referred to as an on state or an operating state or a running state) when the water in the heating device is in a warming phase, or the heating unit of the heating state may be in a standby state (an off state or an off state) when the water in the heating device is in a warming or cooling phase. And the heating unit enters a heating state until the water temperature rises to a preset temperature, enters a standby state, and enters the heating state again when the water temperature falls to a starting temperature, so that the circulation is carried out until the heating device is shut down or restarted. When the heating unit is in heating state and standby state, the user all can have the water demand or not have the water demand, and this application embodiment can confirm the heating power when starting next time according to the user water condition of heating device standby in-process, in addition, can also be according to the user water condition of heating device heating in-process, adjust the heating power in the heating process in real time, from this, effectively reduce the unit and frequently open and stop when satisfying the water demand under the different operating modes, reduce the energy consumption. The preset temperature may be preset by a user, and the starting temperature may be determined according to the preset temperature and the return difference of the heating device, which will be described later.

The following description will be given by taking as an example the process of the heating apparatus in the Q-th standby state and the Q + 1-th heating state, where Q is an integer of 1 or more.

In some embodiments, in step S1, when the heating unit heats the water temperature to the preset temperature, the heating of the heating unit is completed, the qth heating state is ended, at which time, the heating unit enters the qth standby state, that is, the heating unit stops working, and during the standby state, the first water supply condition of the heating device is obtained, which may reflect the water use condition of the user or the water outlet condition of the heating device during the standby state.

In some embodiments, a first change rate of the detected water temperature decrease and/or flow rate change in the water tank may be used as the first water supply condition, for example, the greater the first change rate of the water temperature decrease, the greater the water consumption of the user or the water output of the heating device, and the water temperature may be detected and determined by the temperature sensor, which will be described in detail in the following embodiments; the larger the first change rate of the water flow change is, the larger the water consumption of the user is, or the larger the water output of the heating device is, the water flow can be detected and determined by the water flow sensor arranged at the water outlet of the heating device, and the embodiment of the present application is not limited thereto.

For example, when a first rate of change of a decrease in the temperature of water in the tank is detected as a first water supply condition, the first rate of change is determined based on a preset temperature, a start temperature, and a time required for the temperature of water in the tank to decrease from the preset temperature to the start temperature; wherein (preset temperature-start temperature)/required time may be taken as the first rate of change.

For example, when a first rate of change of a decrease in the water temperature in the tank is detected as a first water supply condition, a maximum rate of change among rates of change of decrease in the water temperature over a plurality of periods during which the water temperature in the tank decreases from the preset temperature to the activation temperature is determined as the first rate of change. And the water temperature reduction in the plurality of time periods in the process of reducing the preset temperature to the starting temperature is all preset difference values. For example, the preset temperature is 60 °, the start temperature is 55 °, the preset difference is 2 °, the rate of change a of the preset temperature from 60 ° to 58 ° for a period a is detected, the rate of change B of the temperature from 59 ° to 57 ° for a period B is detected, the rate of change C of the temperature from 58 ° to 56 ° for a period C is detected, the rate of change D of the temperature from 57 ° to 55 ° for a period D is detected, and the maximum rate of change is selected from the rates of change a, B, C, D as the first rate of change, wherein the time of 2 °/the shortest period may be used as the first rate of change. The number of the multiple time periods may be determined according to needs, and the times of the multiple time periods may overlap, or may not overlap, and may be continuous or discontinuous, which is not limited in this embodiment of the application.

For example, when a first change rate of the water flow rate change is detected as a first water supply condition, the first change rate is determined according to the water flow rate change and the time required for the change; wherein the first rate of change may be the change/time required for the flow of water.

For example, when a first rate of change in water flow rate is detected as a first water supply condition, the rate of change in water flow rate is changed over a plurality of time periods, and the maximum rate of change is taken as the first rate of change. For example, the water amount is changed to a preset change amount in the plurality of periods. For example, the period B1 of time that experiences a preset amount of change A1 determines the rate of change C1, the period B2 of time that experiences a preset amount of change A2 determines the rate of change C2, the period B3 of time that experiences a preset amount of change A3 determines the rate of change C3, and the maximum rate of change is selected from the rates of change C1, C2, C3 as the first rate of change, wherein the time of the preset amount of change/the shortest period of time may be taken as the first rate of change. The number of the multiple time periods may be determined according to needs, and the times of the multiple time periods may overlap, or may not overlap, and may be continuous or discontinuous, which is not limited in this embodiment of the application.

In some embodiments, in step S2, a first power of the heating unit is determined according to the first water supply condition, and the first power is used as a starting power when the heating unit performs heating (heating state) next (Q +1 th time); and determining first power corresponding to the first water supply condition according to a first corresponding relation between a preset water supply condition and the power of the heating unit and the first water supply condition. The first corresponding relation at least comprises that when the first water supply condition meets a first preset condition, the first power is smaller than the power of the heating unit for heating (heating state) last time (Q times); and/or when the first water supply condition meets a second preset condition, enabling the first power to be equal to the power which is heated last time by the heating unit; and/or when the first water supply condition meets a third preset condition, enabling the first power to be larger than the power of the heating unit for heating last time. The first corresponding relationship may include at least one of the above three corresponding relationships, and may further include other corresponding relationships not illustrated. The first preset condition reflects that the water consumption of a user or the water yield of the heating device is low (or no water is used or no water is discharged), at the moment, the first power can be smaller than the power of the heating unit for heating last time, so that the energy consumption of the next heating process is reduced, the third preset condition reflects that the water consumption of the user or the water yield of the heating device is high, at the moment, the first power can be larger than the power of the heating unit for heating last time, so that the required hot water is stably provided for the user, the second preset condition reflects that the water consumption of the user or the water yield of the heating device is moderate, the first power can be equal to the power of the heating unit for heating last time, and therefore, the stable hot water supply can be guaranteed, and the energy consumption is effectively reduced.

In some embodiments, in the first corresponding relationship, the first preset condition may include one or more conditions that the first power is smaller than the power last heated by the heating unit, and the third preset condition may include one or more conditions that the first power is larger than the power last heated by the heating unit. In the first corresponding relationship, the first power may be determined by an absolute value of the power, or the first power may be determined by a relative value of the power (a change value of the power from the last heating), and the absolute value and the relative value may be characterized by a power value, or the absolute value may be characterized by the number of the heating units or the magnitude of the gas flow, or the relative value may be characterized by the change of the number of the heating units or the change of the magnitude of the gas flow, as described in the following example.

For example, the first power is determined by a change in the number of the heating units, and when the first water supply condition satisfies the first preset condition, the first power is made smaller than the power that the heating unit heated last time by decreasing N1 heating units (e.g., heating rods), that is, the first power = the power that the heating unit heated last time — the power of N1 heating rods. N1 may be determined according to different water supply conditions, and when the first water supply condition satisfies the third preset condition, the first power is made larger than the power that the heating unit last heated by adding N2 heating units (e.g., heating rods), that is, the first power = the power that the heating unit last heated + the power of N2 heating rods. The amount of N2 may be determined according to different water supply conditions.

It should be noted that, in different sub-standby states, the first corresponding relationships are the same, partially different, or completely different, and the application is not limited thereto.

The foregoing first rate of change will be described below as an example of the first water supply situation.

In some embodiments, a first power corresponding to the first rate of change is determined based on a first correspondence of a preset rate of change to the power of the heating unit and the first rate of change. The first corresponding relation at least comprises that when the first change rate is not more than a first preset value, the first power is smaller than the power which is heated last time (Q time) by the heating unit; and/or when the first change rate is greater than a first preset value and not greater than a second preset value, enabling the first power to be equal to the power which is heated last time by the heating unit; and/or when the first change rate is larger than a second preset value, enabling the first power to be larger than the power of the heating unit for heating last time. The first preset value is smaller than the second preset value, and the first change rate is positively correlated with the first power. The first corresponding relationship may include at least one of the above three corresponding relationships, and may further include other corresponding relationships not illustrated.

For example, if the first change rate is not greater than the first preset value, the first change rate indicates that the water temperature is decreased slowly and reflects that the water consumption of the user or the water output of the heating device is low (or no water is used or no water is output), at this time, the first power may be smaller than the last heating power of the heating unit, so as to reduce the energy consumption in the next heating process, and if the first change rate is greater than the second preset value, the first power may be greater than the last heating power of the heating unit, so as to stably provide the user with the required hot water.

In some embodiments, in the first corresponding relationship, the first preset value may include one or more values, different intervals are divided by different preset values, and the first power is smaller than the last heating power of the heating unit by different amounts; the second preset value may comprise one or more values, different intervals are divided by different preset values, and the first power is larger than the power which is heated last time by the heating unit by different amounts.

Table 1: an example table of the first corresponding relation

As shown in table 1, the first preset values include two, 2/60 and 2/20, and the second preset value is 2/5, and the first power is determined by the change of the number of the heating units, that is, when the temperature is decreased by 2 ° for more than 60 minutes, the first power = the power of the last heating rod-2 heating rods. When the temperature is decreased by 2 ° between 20 minutes and 60 minutes, the first power = the power of the last heating-1 heating rod. When the temperature is decreased by 2 ° for less than 5 minutes, the first power = the power of the last heating + the power of 1 heating rod. When the temperature is decreased by 2 ° for 5 to 20 minutes, the first power = the power at which the heating was performed last time.

As mentioned above, the first corresponding relationships in different sub-standby states are the same, partially different, or completely different, and the application is not limited thereto. For example, table 1 may be a first correspondence table for the Q-th standby procedure, Q being an integer greater than 1. Table 2 may be a first corresponding relation table of the 1 st standby procedure, as shown in table 2, the first preset values include two, 2/60 and 2/20 respectively, and the second preset value is 2/5, and the first power is determined by the change of the number of the heating units, that is, when the temperature is decreased by 2 ° for more than 60 minutes, the first power = the power of the last heating rod-2 heating rods. When the temperature is decreased by 2 ° between 20 minutes and 60 minutes, the first power = the power of the last heating-1 heating rod. When the temperature is decreased by 2 ° for less than 20 minutes, the first power = the power at which heating was performed last time.

Table 2: an example table of the first corresponding relation

The difference from table 1 is that table 2 does not include a correspondence relationship in which the first wattage is greater than the wattage that the heating unit has heated last time.

In some embodiments, as mentioned above, according to the first corresponding relationship, the first power may be determined, and since the heating unit of the heating device has the maximum operation power and the minimum operation power limitation, the step S2 may further include: when the determined first power is smaller than a first threshold power, controlling the heating unit to heat at the first threshold power when the heating unit is started next time; when the determined first power is larger than a second threshold power, controlling the heating unit to heat at the second threshold power when the heating unit is started next time, wherein the first threshold power is smaller than the second threshold power. For example, the first threshold power is a power of 1 heating unit, and the second threshold power is a power of all X heating units, in other words, during the heating process, at least one heating unit is required to operate, and at most all heating units operate. When the determined first power is smaller than a first threshold power, the heating units are controlled to heat at the first threshold power when the heating units are started next time, that is, 1 heating unit is operated, or 1 heating unit is operated, and the other heating units are stopped, and when the determined first power is larger than a second threshold power, the heating units are controlled to heat at the second threshold power when the heating units are started next time, that is, all the heating units are operated, or all the heating units are operated.

In some embodiments, in step S3, when it is detected that the temperature of the water in the water tank is reduced to the starting temperature, the heating unit is started, the heating unit is controlled to heat at the first power determined in step S2, and the heating unit enters a heating state.

In some embodiments, during the Q +1 th heating state, a second water supply condition of the heating device is obtained, and the second water supply condition can reflect the water use condition of the user or the water outlet condition of the heating device during the heating state. According to the water consumption condition of the user in the heating process of the heating device, the heating power in the heating process is adjusted in real time, so that the frequent start and stop of the unit can be effectively reduced while the stable hot water supply is ensured, and the energy consumption is reduced. That is, during the heating state, the starting power of the (Q + 1) th heating process (the first power determined at step S2) may be adjusted according to the water usage situation of the user.

In some embodiments, a second rate of change of the water temperature and/or the flow rate change in the water tank may be detected as the second water supply condition, for example, a smaller second rate of change of the water temperature is indicative of a larger water consumption by the user or a larger water output of the heating device, and the water temperature may be detected and determined by the temperature sensor, which will be described in detail in the following embodiments; the larger the second change rate of the water flow change is, the larger the water consumption of the user is, or the larger the water output of the heating device is, the water flow can be detected and determined by the water flow sensor arranged at the water outlet of the heating device, and the embodiment of the present application is not limited thereto.

For example, when a second rate of change in the rise in water temperature in the tank is detected as a second water supply condition, the second rate of change is determined based on the current temperature, the starting temperature, and the time required for the water temperature in the tank to rise from the starting temperature to the current temperature; wherein (detected temperature-start temperature)/required time may be taken as the second rate of change. The detection temperature may be preset, for example, the start temperature is 55 °, the detection temperature is 57 °, or the required time may be a preset time length, for example, 1 minute, but the embodiment of the present application is not limited thereto.

For example, when a second change rate of the water flow rate change is detected as a second water supply condition, the second change rate is determined according to the water flow rate change and the time required for the change; wherein the second rate of change can be the water flow rate change/time required.

In some embodiments, the second power of the heating unit is determined according to the second water supply condition, that is, the second power corresponding to the second water supply condition is determined according to a preset second corresponding relationship between the water supply condition and the power of the heating unit and the second water supply condition. When the second corresponding relation at least comprises that the second power is smaller than the first power when the second water supply condition meets a fourth preset condition; and/or when the second water supply condition meets a fifth preset condition, enabling the second power to be equal to the first power; and/or when the second water supply condition meets a sixth preset condition, enabling the second power to be larger than the first power. The second corresponding relationship may include at least one of the above three corresponding relationships, and may further include other corresponding relationships that are not illustrated. The fourth preset condition reflects that the water consumption of a user or the water yield of the heating device is low (or no water is used or no water is discharged), at the moment, the second power can be smaller than the first power, so that the energy consumption in the heating process is further reduced, the sixth preset condition reflects that the water consumption of the user or the water yield of the heating device is high, at the moment, the second power can be larger than the first power, so that the required hot water is stably provided for the user, the fifth preset condition reflects that the water consumption of the user or the water yield of the heating device is moderate, and the second power can be equal to the first power, so that the stable hot water supply can be ensured, and the energy consumption is effectively reduced.

In some embodiments, in the second corresponding relationship, the fourth preset condition may include one or more conditions, where under different conditions, the second power is smaller than the first power by a different amount, and the sixth preset condition may include one or more conditions, where under different conditions, the second power is larger than the first power by a different amount. In the second corresponding relationship, the second power may be determined by an absolute value of the power, or the second power may be determined by a relative value of the power (a change value relative to the first power), where the absolute value and the relative value may be represented by a power value, or the absolute value may be represented by the number of the heating units or the gas flow rate, or the relative value may be represented by the change of the number of the heating units or the change of the gas flow rate, and the first corresponding relationship may be specifically referred to, and details are not described herein.

It should be noted that, in different heating states, the second corresponding relationship is the same, partially different, or completely different, and the application is not limited thereto.

The foregoing second rate of change will be described below as an example of the second water supply condition.

In some embodiments, a second power corresponding to the second rate of change is determined according to a second correspondence of a preset rate of change to the power of the heating unit and the second rate of change. The second corresponding relation at least comprises that when the second change rate is not larger than a third preset value, the second power is larger than the first power; and/or when the second change rate is greater than a third preset value and not greater than a fourth preset value, enabling the second power to be equal to the first power; and/or when the second change rate is larger than a fourth preset value, enabling the second power to be smaller than the first power. The third preset value is smaller than the fourth preset value, a second change rate which indicates that the water temperature is high is in negative correlation with the second power, and a second change rate which indicates that the water flow change is in positive correlation with the second power. The second corresponding relationship may include at least one of the above three corresponding relationships, and may further include other corresponding relationships that are not illustrated.

For example, if the second change rate is not greater than the third preset value, the water temperature increase rate is slower, which reflects that the water consumption of the user or the water output of the heating device is greater, and at this time, the second power may be greater than the first power, thereby stably providing the user with the required hot water, and if the second change rate is greater than the fourth preset value, the water temperature increase rate is faster, which reflects that the water consumption of the user or the water output of the heating device is less (or no water is used or no water is output), and at this time, the second power may be smaller than the first power, thereby reducing the energy consumption in the next heating process, and if the second change rate is greater than the third preset value and not greater than the fourth preset value, the second power may be equal to the first power, thereby effectively reducing the energy consumption while ensuring stable hot water supply.

In some embodiments, in the second corresponding relationship, the third preset value may include one or more values, different intervals divided by different preset values, and the second power is larger than the first power by a different amount; the fourth preset value may comprise one or more values, different intervals divided by different preset values, the second power being different amounts less than the first power.

Table 3: an example table of the second corresponding relation

Rate of change	The variation of the second power relative to the first power
		The temperature rise is more than 2 DEG/min	Reduce	1 heating unit (heating rod)
The temperature is increased between 2 and 5 DEG/min	The number of heating units (heating rods) is not changed
		The temperature rise is less than 2 DEG/min	Adding 1 heating unit (heating rod)

As shown in table 3, the third preset value is 2, the fourth preset value is 5, and the second power is determined by the change of the number of the heating units, that is, the second power = the first power-the power of 1 heating rod when the temperature rises more than 2 °/min. Second power = first power when the temperature is increased between 2 ° and 5 °/min. Second power = first power + power of 1 heating rod when the temperature rise is less than 2 °/minute.

In some embodiments, as mentioned above, according to the second corresponding relationship, the second power may be determined, and since the heating unit of the heating apparatus has the maximum operation power and the minimum operation power limitation, the step S4 may further include: when the determined second power is smaller than a first threshold power, controlling the heating units to heat at the first threshold power, that is, 1 heating unit is operated, or 1 heating unit works, and the other heating units stop operating; and when the determined second power is larger than a second threshold power, controlling the heating unit to heat at the second threshold power, namely, operating all the heating units, or enabling all the heating units to work.

In some embodiments, as described above, when the heating unit starts to enter the Q +1 th heating state, the heating unit is controlled to heat at the first power by using the first power as the starting power, during the first time period of heating at the first power, the starting power (the first power) of the Q +1 th time can be adjusted in real time according to the second water supply condition (the second change rate) of the first time period, and at the subsequent time of the first time period of the Q +1 th heating state, the heating unit is controlled to heat at the second power until the heating unit heats the water temperature to the preset temperature, and the Q +1 th heating state ends, at this time, the heating unit enters the Q +1 th standby state.

In the above, the second power is determined once in step S4 as an example, but the embodiment of the present application is not limited thereto, and the second power may be adjusted multiple times in step S4, that is, step S4 includes: step S41, acquiring a second water supply condition of the heating device in an Mth time slot during the heating period of the heating unit, determining a second power of the heating unit in an M +1 th time slot according to the second water supply condition in the Mth time slot, and controlling the heating unit to heat at the M +1 th time slot by the second power; repeating the step S41 until the hot water in the heating device is heated to the target temperature, wherein the value of M is an integer greater than or equal to 1. The length of the mth time segment and the length of the M +1 th time segment are the same or different, and the mth time segment and the M +1 th time segment are continuous or discontinuous on the time axis.

Fig. 2 is a schematic diagram of an implementation manner of step S4 for the Q +1 th heating state in the embodiment of the present application, and as shown in fig. 2, step S4 includes:

201, acquiring a second water supply condition of the heating device in an Mth time period in the heating period of the heating unit;

202, determining a second power of the heating unit in the M +1 time period according to the second water supply condition in the M time period;

203, heating the heating unit at the second power in the step 202 in the (M + 1) th time period;

and 204, judging whether the water temperature reaches a preset temperature, ending when the water temperature reaches the preset temperature, otherwise, M = M +1, and returning to the step 201.

The embodiment of step 201 above is as described above, initially M =1. For example, the starting time point of the 1 st time period is the starting time of the Q +1 st heating state, each time period is 1 minute, and each time period is continuous in time, that is, the second power is updated once per minute, which is only described here as an example, the present application is not limited thereto, the starting time point may also be at other positions, the time period may also take other time lengths, and the time period may also be discontinuous, for example, the second power is updated once every one minute, which is not illustrated here any more. For example, a second rate of change of the water temperature rise and/or the flow rate change in the water tank in the mth period is detected as the second water supply condition in the mth period, and a second change power is specifically calculated as described above with M =1, and is not repeated here

In some embodiments, in step 202, when M =1, an implementation manner thereof is as described above, for example, with reference to table 3, to determine the second power, when M is greater than 1, an implementation manner thereof is similar, for example, according to a preset second corresponding relationship between a change rate and the power of the heating unit and a second change rate of an mth time period, to determine the second power of an M +1 th time period corresponding to the second change rate, and when the second change rate of the temperature increase of the water in the water tank of the mth time period is detected as the second water supply condition, when the second change rate of the mth time period is not greater than a third preset value, to make the second power of the M +1 th time period greater than the second power of the mth time period; and/or when the second change rate of the Mth time period is greater than a third preset value and not greater than a fourth preset value, enabling the second power of the M +1 th time period to be equal to the second power of the Mth time period; and/or when the second rate of change of the mth time period is greater than a fourth preset value, making the second power of the M +1 th time period smaller than the second power of the mth time period, for example, referring to table 4, determining the second power of the M +1 th time period.

Table 4: an example table of the second corresponding relation

As shown in table 4, the third preset value is 2, the fourth preset value is 5, and the second power is determined by the change of the number of the heating units, that is, the second power of the M +1 th time period = the second power of the M +1 th time period-the power of the heating rod when the temperature rises more than 2 °/minute. And when the temperature rises between 2 and 5 degrees/minute, the second power of the M +1 time period = the second power of the M time period. The second power of the M +1 th session = the second power of the M +1 th session + the power of the 1 heating rod at the temperature rise of less than 2 °/minute. When the determined second power of the (M + 1) th time period is smaller than a first threshold power, controlling the heating units to heat at the first threshold power, that is, 1 heating unit is operated, or 1 heating unit is operated, and other heating units are stopped; when the second power of the determined (M + 1) th time period is greater than a second threshold power, controlling the heating units to heat at the second threshold power, that is, operating all the heating units, or operating all the heating units.

As can be seen from the above embodiment, when the first change rate is not greater than a first preset value, the first power is smaller than the power of the heating unit heating last time, and when the second change rate is not greater than a third preset value, the second power is greater than the first power; or the second power of the (M + 1) th time period is larger than the power of the Mth time period, so that the problem of insufficient heat load when water is suddenly used after one-time adjustment can be avoided by adjusting the heating power (the number of heating units) in an accumulated way for multiple times; the temperature rise is continuously adjusted in real time in the heating process, and the phenomenon that the hot water quantity is insufficient when water is suddenly used can be avoided. In addition, when the first change rate is not greater than a first preset value, the first power is made to be smaller than the power of the heating unit for heating last time, and when the second change rate is greater than a fourth preset value, the second power is made to be smaller than the first power, or the second power in the (M + 1) th time period is made to be smaller than the power in the (M) th time period, so that energy consumption can be further saved. In addition, under other working condition combinations of the standby state and the heating state, the energy consumption can be reduced while the stable hot water supply is ensured, and the description is omitted here.

The above description has been made by taking the process of the Q-th standby state and the Q + 1-th heating state as an example, and Q is an integer of 1 or more. For the 1 st heating state process, the control method may further include:

and S0, when the heating unit is powered on and then is heated for the first time, controlling the heating unit to heat at the maximum power until the water temperature in the water tank is increased to the preset temperature. The maximum power is the second threshold power, that is, all the heating units of the heating units are controlled to start to operate until the temperature of the water in the water tank is increased to the preset temperature.

Fig. 3 is a schematic view of a control method of a heating apparatus according to an embodiment of the present application, and as shown in fig. 3, the control method includes:

301, starting the heating device;

302, heating for the first time after the heating unit is powered on, and controlling the heating unit to heat at the maximum power until the temperature of water in the water tank is increased to a preset temperature; let Q =1;

303, the heating unit enters a Q-th standby state to acquire a first water supply condition of the heating device;

304, determining a first power of the heating unit according to the first water supply condition;

305, when the water temperature in the water tank is reduced to the starting temperature, controlling the heating unit to heat at the first power, and enabling the heating unit to enter a Q +1 th heating state; let M =1;

306, acquiring a second water supply condition of the heating device in an Mth time period in the period of heating for the heating unit for the (Q + 1) th time;

307, determining a second power of the heating unit in the M +1 time period according to the second water supply condition in the M time period;

308, heating the heating unit at the second power in the step 307 in the (M + 1) th time period;

309, judging whether the water temperature reaches a preset temperature, when the water temperature reaches the preset temperature, Q = Q +1, returning to the step 303, otherwise, M = M +1, and returning to the step 306.

After the heating device is de-energized, operations 301-309 are stopped.

For the execution modes of 301-309, reference may be made to 101-104 and 201-204, and repeated descriptions are omitted.

For example, referring to tables 2 and 3, when the first water supply condition is a temperature decrease of 2 ° for more than 60 minutes in 304, it is determined to decrease 2 heating units, and when the second water supply condition is a temperature increase of less than 2 ° per minute in 307, it is determined to further increase 1 heating unit, that is, the second power of the M +1 th time period is equal to the power of the last heating unit of-2 +1 heating units, and if the second water supply condition is a temperature increase of more than 5 ° per minute in 307, it is determined to further decrease 1 heating unit, that is, the second power of the M +2 th time period is equal to the power of the last heating unit of-2 +1 heating units of-1 heating unit, which is not illustrated herein. That is, by adjusting the heating power (the number of heating units) cumulatively for a plurality of times, the situation that the heat load is insufficient when water is suddenly used after one-time adjustment can be avoided; the temperature rise is continuously adjusted in real time in the heating process, and the phenomenon that the hot water quantity is insufficient when water is suddenly used can be avoided.

In some embodiments, after entering the Q-th time standby state process, in addition to determining the first power according to the first water supply condition, the first return difference of the heating device may be determined according to the first water supply condition, for example, when the first change rate is taken as the first water supply condition, the first change rate is in negative correlation with the first return difference, the starting temperature of the Q + 2-th time heating state is determined according to the first return difference, that is, the starting temperature in the aforementioned step 305 is equal to the difference between the preset temperature and the first return difference determined by the Q-1-th time standby state entering process (the initial return difference can be regarded as the first return difference determined by the 0-th time standby state entering process), or when to enter the Q + 2-th time heating state is determined according to the first return difference. Therefore, the unit is prevented from being started and stopped frequently. And determining the first return difference according to the third corresponding relation between the change rate and the return difference and the first change rate. The return difference (also called as return difference temperature) of the heating device is a temperature difference value between a preset temperature of water when the heating unit stops operating and a starting temperature of water when the heating unit restarts, for example, the initial return difference may be set to 5 °, the preset temperature is set to 60 °, when the water temperature is 60 °, the heating unit stops operating, at this time, the water temperature gradually decreases, and when the water temperature decreases to 60 ° -5 ° =55 °, the heating unit restarts.

In some embodiments, when entering the standby state for the first time, when the first change rate is not greater than a first preset value, the first return difference is made greater than an initial return difference of the heating device; and/or when the first change rate is greater than a first preset value and not greater than a second preset value, enabling the first return difference to be greater than or equal to an initial return difference of the heating device; and/or when the first change rate is larger than a second preset value, the first return difference is smaller than the initial return difference of the heating device. And determining when to enter a second heating state according to the first return difference.

Table 5: an example table of the third corresponding relation

Rate of change	Variation of the first return difference from the initial return difference
		Cooling for 2 deg.C over 60 min	+1°
The temperature is reduced by 2 ℃ for 20 to 60 minutes	0°
		Cooling for 2 deg.C less than 20 min	-1°

As shown in table 5, when the first change rate is decreasing the temperature by 2 ° for more than 60 minutes, the first return difference is 1 ° more than the initial return difference, for example, 5+1=6 °, that is, when the temperature is decreased to 54 °, the heating unit is restarted to enter the second heating state.

In some embodiments, when Q is greater than or equal to 1, that is, when the step S1 is performed a plurality of times, when the first rate of change acquired when the step S1 is performed Q +1 th time (into a standby state) is not greater than a first preset value, the first backlash is made greater than the first backlash determined when the step S1 is performed Q th time (into a standby state); and/or, when the first change rate obtained when the step S1 is executed (in the standby state) for the Q +1 th time is greater than a first preset value and not greater than a second preset value, making the first return difference equal to the first return difference determined when the step S1 is executed (in the standby state) for the Q th time; and/or when the first change rate acquired when the step S1 is executed (enters a standby state) for the (Q + 1) th time is greater than a second preset value, enabling the first return difference to be smaller than the first return difference determined when the step S1 is executed (enters the standby state) for the (Q + 1) th time. And determining when to enter the heating state of the Q +2 th time according to the first return difference determined by the entry of the standby state of the Q +1 th time.

Table 6: an example table of the third corresponding relation

As shown in table 6, when the first rate of change is that the temperature is decreased by 2 ° for more than 60 minutes, the first difference determined by the Q +1 th entry into the standby state is 1 ° more than the first difference determined by the Q +1 th entry into the standby state, for example, when Q =1, the first difference determined by the second entry into the standby state is that the first difference determined by the first entry into the standby state is 6 ° plus 1 °, which is 7 °, that is, when the temperature is decreased to 53 °, the heating unit is restarted to enter the third heating state. Therefore, the return difference can be adjusted in an accumulated mode for multiple times, and frequent starting and stopping of the unit are further avoided.

In some embodiments, when the heating time length (operation time length) of each heating unit is unevenly distributed, the service lives of the heating units are easily different, and in order to solve the problem, the method may further include: (not shown), counting the accumulated operation time of each heating unit; and adjusting the starting sequence of each heating unit according to the accumulated running time. Or the heating units are sequentially switched on or off according to the arrangement sequence of the heating units.

For example, when the first power is determined to be larger than the power of the heating unit for heating last time according to the first water supply condition, for example, the power of 1 heating unit needs to be increased, the heating unit with short operation time is preferentially started, or the next heating unit is started in sequence, and when the first power is determined to be smaller than the power of the heating unit for heating last time according to the first water supply condition, for example, the power of 1 heating unit needs to be reduced, the heating unit with long operation time is preferentially closed, or the next heating unit is closed in sequence, so that the service time of each heating unit is averaged, the service lives of the heating unit and the heating device are prolonged, and the phenomenon of insufficient heat load is avoided.

In the above embodiment, it is referred to detecting that the water temperature is lowered or raised, or detecting whether the water temperature reaches the activation temperature or the preset temperature, which may be determined by detection of the temperature sensor provided in the heating device, as described below.

In some embodiments, at least two temperature sensors may be disposed in the water tank of the heating device, and are respectively configured to detect an upper water temperature and a lower water temperature of the water tank, and perform weighting according to the upper water temperature and the lower water temperature to obtain a water temperature in the water tank, where the water temperature in the water tank is used as a determination parameter for starting and stopping the heating device, and the weighting during weighting may be fixed.

The inventor found that, in the case of the conventional heating apparatus in which the upper water temperature is too high, the overheat cut-off occurs, and if the weighting value is fixed and the upper water temperature is high, the deviation between the acquired water temperature in the tank (weighted temperature) and the upper water temperature is large, and therefore, if the water temperature obtained based on the fixed weighting value is compared with the preset shutdown temperature for judgment, the overheat cut-off occurs because the upper water temperature is too high before the shutdown condition of the heating apparatus is triggered. In addition, when the upper water temperature is low, the deviation between the acquired water temperature in the water tank (the temperature obtained after weighting) and the lower water temperature is large, when the heating device should be started, the heating device cannot be started in time due to the fact that the deviation of the temperature obtained based on the fixed weighted value is too large, the amount of cold water discharged after starting is large, and the hot water supply requirement of a user cannot be met in time.

In some embodiments, the higher the upper water temperature fraction; the lower the upper water temperature, the higher the lower water temperature ratio. For example, when the upper water temperature is in a first upper water temperature interval, the weighted upper water temperature is a first weight, when the upper water temperature is in a second upper water temperature interval, the weighted upper water temperature is a second weight, and when a minimum value of the first upper water temperature interval is greater than a maximum value of the second upper water temperature interval, the first weight is greater than the second weight.

That is, the weight of the upper water temperature is weighted to be in a stepwise increasing trend along with the increase of the upper water temperature, for example, the upper water temperature is below 50 degrees, the weighting ratio of the upper water temperature to the lower water temperature is 10, the weighting ratio of the upper water temperature to the lower water temperature is in the range of 50 ° to 60 °, the weighting ratio of the upper water temperature to the lower water temperature is 15, the upper water temperature is in the range of 60 ° to 70 °, the weighting ratio of the upper water temperature to the lower water temperature is 20, the upper water temperature is above 70 degrees, and the weighting ratio of the upper water temperature to the lower water temperature is 25, so that when the upper water temperature is high, the proportion of the upper water temperature is increased, the temperature difference between the weighted temperature and the upper water temperature is reduced, and the occurrence of overtemperature cutoff caused by continuous temperature rise after the machine is stopped is avoided; when the upper water temperature is lower, the proportion of the upper water temperature is reduced, and the proportion of the lower water temperature is increased, so that the heating device can be started in advance, and the hot water supply requirement of a user is met.

The inventor finds that if the difference between the upper water temperature and the lower water temperature is too large, the deviation between the acquired water temperature in the water tank (the weighted temperature) and the upper water temperature is large, as described above, the problem of the over-temperature shutdown may be caused by the too high upper water temperature after heating, and even though the problem may be solved by a non-fixed weighted value, the over-temperature shutdown may be caused by the continuous temperature rise of the heating apparatus after the shutdown. Therefore, when the temperature difference between the water temperatures of the upper part and the lower part is large, the temperature difference between the weighted temperature and the water temperature of the upper part can be further reduced by introducing a compensation value, and the situation that the heating device is switched off due to the fact that the heating device is subjected to overtemperature cutoff caused by the possibly existing continuous temperature rise after the heating device is shut down is avoided.

In some embodiments, the temperature difference between the upper water temperature and the lower water temperature is in positive correlation with the compensation value, that is, the larger the temperature difference is, the larger the compensation value is, wherein when the temperature difference between the upper water temperature and the lower water temperature is smaller than the first temperature difference value, no compensation is required, that is, the compensation value is 0, and when the temperature difference between the upper water temperature and the lower water temperature is greater than or equal to the first temperature difference value, the compensation value is in a trend of ascending in a stepwise manner along with the ascending of the temperature difference between the upper water temperature and the lower water temperature. For example, when the temperature difference between the upper water temperature and the lower water temperature is more than 70 ℃, the compensation value is 3 ℃; when the temperature difference between the upper water temperature and the lower water temperature is 50-70 ℃, the compensation value is 2 ℃; when the temperature difference between the upper water temperature and the lower water temperature is 30-50 ℃, the compensation value is 1 ℃; when the temperature difference between the upper water temperature and the lower water temperature is below 30 ℃, the compensation value is 0.

Table 7: comparison table of water temperature after adjusting weighted specific gravity and temperature compensation and water temperature without weighted compensation

As shown in table 7, the weight of the adjustment weight and the temperature compensated water temperature and the display temperature deviation are reduced.

In some embodiments, the method may further comprise: determining a water consumption curve of a user according to the accumulated operation time of each heating unit, and starting all the heating units in advance in the peak time period of water consumption of the user to ensure sufficient hot water supply; during the water-free time period, the number of the heating units is reduced, or the return difference temperature is increased, or the starting temperature is reduced, so that the energy consumption is reduced.

It should be noted that the above fig. 1 to 3 only schematically illustrate the embodiments of the present application, but the present application is not limited thereto. For example, the order of execution of various operations may be appropriately adjusted, and other operations may be added or some of the operations may be subtracted. Those skilled in the art can make appropriate modifications in light of the above disclosure, and are not limited to the description of fig. 1 to 3.

According to the embodiment, the heating power during the next starting can be determined according to the water consumption condition of the user in the standby process of the heating device, and in addition, the heating power in the heating process can be adjusted in real time according to the water consumption condition of the user in the heating process of the heating device, so that the frequent starting and stopping of the unit can be effectively reduced while the stable hot water supply is ensured, and the energy consumption is reduced.

Embodiments of the second aspect

An embodiment of a second aspect of the present application provides a control device, fig. 4 is a schematic configuration diagram of the control device in the embodiment of the present application, and as shown in fig. 4, the control device 400 in the embodiment of the present application may include: at least one interface (not shown in fig. 4), a processor (e.g., a Central Processing Unit (CPU)) 401, a memory 402; a memory 402 is coupled to the processor 401. The memory 402 may store various data; further, a program 403 is stored, and the program 403 is executed under the control of the processor 401, and various preset thresholds, predetermined conditions, and the like are stored.

In some embodiments, the processor 401 may implement the control method described in the first aspect, for example, the processor 401 may be configured to: after the heating unit finishes heating, acquiring a first water supply condition of the heating device; determining first power of the heating unit according to the first water supply condition, and taking the first power as initial power of the heating unit when the heating unit heats next time; when the heating unit is started next time, controlling the heating unit to heat at the first power; and acquiring a second water supply condition of the heating device in the heating period of the heating unit, determining a second power of the heating unit according to the second water supply condition, and controlling the heating unit to heat at the second power.

It is noted that the control device 400 may further comprise a communication module 404, for example, for receiving data from a temperature sensor and sending control start or stop commands to the heating unit. Or not necessarily all of the components shown in figure 4; in addition, the control device 400 may further include components not shown in fig. 4, which refer to the related art and are not illustrated herein.

In the present embodiment, the processor 401, sometimes referred to as a controller or operation control, may comprise a microprocessor or other processor device and/or logic device.

In the present embodiment, the memory 402 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. Various information may be stored, and programs for executing the related information may be stored. And the processor 401 may execute the program stored in the memory 402 to realize information storage or processing, etc. The functions of other parts are similar to the prior art and are not described in detail here. The various components of the control device 400 may be implemented in dedicated hardware, firmware, software, or combinations thereof, without departing from the scope of the present application.

For example, when the heating device is applied to an electric water heater, the processor 401 may be configured separately from the processor of the electric water heater, for example, the processor 401 is configured as a chip connected to the processor of the electric water heater, and the two may be controlled with each other, or the function of the processor 401 may be integrated into the processor of the electric water heater itself, which is not limited in the embodiment of the present application.

Embodiments of the third aspect

Embodiments of a third aspect of the present application provide a heating device. Fig. 5 is a schematic view of a heating device according to an embodiment of the present application. As shown in fig. 5, the heating apparatus 500 includes: a heating unit 502, and a control device 501, and the control device 501 may refer to the control device 400 of the second aspect, and will not be repeated here.

In some embodiments, the heating device may be an electric water heater or a gas water heater. For example, when the heating device is an electric water heater, the heating device includes a water tank 503 and a plurality of (hereinafter, referred to as X) heating units 502 located in the water tank, where X is an integer not less than 2, and the heating units are heated by supplying power to the heating units, so that a heating function can be achieved, for example, the heating units are heating rods, and the power of the heating rods is the same and constant. For example, when the heating device is a gas water heater, the heating device includes a water tank 503 and a heating unit 502 (including a burner and a gas valve), etc., the gas valve controls the flow of gas entering the burner, and the heat is transferred to cold water in the water tank by a combustion heating method, so that the water temperature is raised, and thus the heating function can be realized.

In some embodiments, the heating device 500 further includes at least two temperature sensors 504, which are respectively used for detecting the upper water temperature and the lower water temperature of the water tank 503, and the control device 501 is in communication with the temperature sensors 504 to obtain the upper water temperature and the lower water temperature to determine the water temperature, which is described in detail herein and will not be described again.

For example, when the heating device is applied to an electric water heater, the control device 501 may be configured separately from a processor of the electric water heater, for example, the control device 501 is configured as a chip connected to the processor of the electric water heater, and the two may be controlled with each other, or the function of the control device 501 may be integrated into the processor of the electric water heater itself, which is not limited in the embodiment of the present application.

In some embodiments, each heating unit further comprises a switch, which may be a relay or a contactor, that controls the heating unit.

In some embodiments, the heating unit is in an operating state, where in the operating state means that a corresponding switch in the heating unit is in an on state, and the stopping operation means that the switch controlling the heating unit is in an off state.

It is noted that the heating device 500 may also include components not shown in fig. 5, which are referred to in the related art and are not illustrated herein.

Embodiments of the present application also provide a computer program, where when the program is executed in a control device or a heating device, the program causes the control device or the heating device to execute the control method described in the embodiments of the first aspect.

Embodiments of the present application further provide a storage medium storing a computer program, where the computer program enables a control device or a heating device to execute the control method described in the embodiment of the first aspect.

The data transmission apparatus described in connection with the embodiments of the present application may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. For example, one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams illustrated in the figures may correspond to individual software modules, or may correspond to individual hardware modules of a computer program flow. These software modules may correspond to the steps shown in fig. 1-3, respectively. These hardware modules may be implemented, for example, by solidifying these software modules using a Field Programmable Gate Array (FPGA).

A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium; or the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The software module may be stored in the memory of the information processing system or in a memory card that is insertable into the information processing system.

One or more of the functional block diagrams and/or one or more combinations of the functional block diagrams described in the figures can be implemented as a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof designed to perform the functions described herein. A combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP communication, or any other such configuration, may also be implemented with respect to one or more of the functional block diagrams and/or one or more combinations of functional block diagrams depicted in the figures.

The present application has been described in conjunction with specific embodiments, but it should be understood by those skilled in the art that these descriptions are intended to be illustrative, and not limiting. Various modifications and adaptations of the present application may occur to those skilled in the art based on the spirit and principles of the application and are within the scope of the application.

Claims

1. A control method of a heating apparatus, characterized in that the heating apparatus includes a heating unit for heating water, the heating apparatus is for supplying hot water, the method includes:

2. The control method according to claim 1, wherein the step S4 includes:

step S41, acquiring a second water supply condition of the heating device in an Mth time slot during the heating period of the heating unit, determining a second power of the heating unit in an M +1 th time slot according to the second water supply condition in the Mth time slot, and controlling the heating unit to heat at the M +1 th time slot by the second power; repeating the step S41 until the hot water in the heating device is heated to a preset temperature, wherein the value of M is an integer greater than or equal to 1.

3. The control method according to claim 1,

when the first power determined in the step S2 is smaller than a first threshold power, controlling the heating unit to heat at the first threshold power when the heating unit is started next time; when the first power determined in the step S2 is greater than a second threshold power, controlling the heating unit to heat at the second threshold power when the heating unit is started next time, wherein the first threshold power is less than the second threshold power.

4. The control method according to claim 1,

when the second power determined in the step S4 is less than a first threshold power, controlling the heating unit to heat at the first threshold power; and when the second power determined in the step S4 is greater than a second threshold power, controlling the heating unit to heat at the second threshold power, wherein the first threshold power is less than the second threshold power.

5. The control method according to any one of claims 1 to 4,

when the first water supply condition meets a first preset condition, enabling the first power to be smaller than the power of the heating unit for heating last time;

and/or the presence of a gas in the gas,

when the first water supply condition meets a second preset condition, enabling the first power to be equal to the power which is heated by the heating unit last time;

and/or the presence of a gas in the gas,

and when the first water supply condition meets a third preset condition, enabling the first power to be larger than the power of the heating unit for heating last time.

6. The control method according to any one of claims 1 to 4,

when the second water supply condition meets a fourth preset condition, enabling the second power to be smaller than the first power;

and/or the presence of a gas in the gas,

when the second water supply condition meets a fifth preset condition, enabling the second power to be equal to the first power;

and/or the presence of a gas in the gas,

and when the second water supply condition meets a sixth preset condition, enabling the second power to be larger than the first power.

7. The control method according to claim 1,

the heating device comprises a water tank for storing hot water;

in the step S1: and after the heating unit finishes heating, detecting a first change rate of the water temperature reduction and/or the flow change in the water tank as the first water supply condition.

8. The control method according to any one of claims 1 to 4 or 7,

the heating device comprises a water tank for storing hot water;

in the step S4, a second rate of change of the temperature rise and/or the flow rate change of the water in the tank is detected as the second water supply condition.

9. The control method according to claim 7,

when the first change rate is not larger than a first preset value, enabling the first power to be smaller than the power of the heating unit for heating last time;

and/or the presence of a gas in the gas,

when the first change rate is greater than a first preset value and not greater than a second preset value, enabling the first power to be equal to the power of the heating unit for heating last time;

and/or the presence of a gas in the gas,

and when the first change rate is larger than a second preset value, enabling the first power to be larger than the power of the heating unit for heating last time.

10. The control method according to claim 8, wherein, when a second rate of change in the temperature increase of the water in the water tank is detected as the second water supply condition,

when the second change rate is not larger than a third preset value, enabling the second power to be larger than the first power;

and/or the presence of a gas in the gas,

when the second change rate is greater than a third preset value and not greater than a fourth preset value, enabling the second power to be equal to the first power;

and/or the presence of a gas in the gas,

and when the second change rate is greater than a fourth preset value, enabling the second power to be smaller than the first power.

11. The control method according to claim 8, wherein, when a second rate of change in the temperature increase of the water in the water tank is detected as the second water supply condition,

when the second change rate is not greater than a third preset value, enabling the second power of the M +1 th time period to be greater than the second power of the M +1 th time period;

and/or the presence of a gas in the gas,

when the second change rate is greater than a third preset value and not greater than a fourth preset value, enabling the second power of the M +1 th time period to be equal to the second power of the M +1 th time period;

and/or the presence of a gas in the gas,

and when the second change rate is greater than a fourth preset value, enabling the second power of the M +1 time period to be smaller than the second power of the M time period.

12. The control method according to claim 7, wherein, upon detecting a first rate of change in a decrease in the temperature of water in the water tank,

determining the first change rate according to a preset temperature, a starting temperature and the time required for the water temperature in the water tank to fall from the preset temperature to the starting temperature; alternatively, the first and second electrodes may be,

and the maximum change rate in the change rates of the water temperature reduction in a plurality of time periods in the process of reducing the water temperature in the water tank from the preset temperature to the starting temperature is used as the first change rate.

13. The control method according to claim 1,

the heating device comprises a water tank for storing hot water; the method further comprises the following steps:

and S0, when the heating unit is powered on and then is heated for the first time, controlling the heating unit to heat at the maximum power until the water temperature in the water tank is increased to the preset temperature.

14. The control method according to claim 1,

the heating device comprises a water tank for storing hot water;

the step S3 includes: and when the temperature of the water in the water tank is detected to be reduced to the starting temperature, the heating unit is started, and the heating unit is controlled to heat with the first power.

15. The control method according to claim 8,

the heating device comprises a water tank for storing hot water;

in the step S41, a second rate of change of the water temperature rise and/or the flow rate change in the water tank in the mth period is detected as the second water supply condition in the mth period.

16. The control method according to claim 7,

and determining first power corresponding to the first change rate according to a first corresponding relation between a preset change rate and the power of the heating unit and the first change rate.

17. The control method according to claim 8,

and determining second power corresponding to the second change rate according to a second corresponding relation between a preset change rate and the power of the heating unit and the second change rate.

18. The control method according to claim 16 or 17, characterized in that in the first correspondence relationship and/or the second correspondence relationship, the magnitude of the power of the heating unit is characterized by a change in the number of the heating units or a change in the magnitude of the gas flow rate.

19. The control method according to claim 16 or 17, wherein the first rate of change is positively correlated with the first power, and the second rate of change, which indicates an increase in the water temperature, is negatively correlated with the second power.

20. The control method according to claim 7, characterized in that the method further comprises:

determining a first return difference of the heating device according to the first rate of change.

21. The control method of claim 20, wherein the first rate of change is inversely related to the first return.

22. The control method according to claim 21, characterized in that the method further comprises:

when the first change rate is not larger than a first preset value, enabling the first return difference to be larger than the initial return difference of the heating device;

and/or the presence of a gas in the gas,

when the first change rate is greater than a first preset value and not greater than a second preset value, enabling the first return difference to be greater than or equal to an initial return difference of the heating device;

and/or the presence of a gas in the gas,

and when the first change rate is greater than a second preset value, enabling the first return difference to be smaller than the initial return difference of the heating device.

23. The control method according to claim 21, wherein, when said step S1 is executed a plurality of times,

when the first change rate acquired when the step S1 is executed for the (Q + 1) th time is not more than a first preset value, enabling the first return difference to be larger than the first return difference determined when the step S1 is executed for the (Q + 1) th time;

and/or the presence of a gas in the gas,

when the first change rate acquired when the step S1 is executed for the (Q + 1) th time is greater than a first preset value and not greater than a second preset value, enabling the first return difference to be equal to the first return difference determined when the step S1 is executed for the (Q) th time;

and/or the presence of a gas in the gas,

and when the first change rate acquired when the step S1 is executed for the (Q + 1) th time is greater than a second preset value, enabling the first return difference to be smaller than the first return difference determined when the step S1 is executed for the (Q) th time, wherein Q is an integer greater than or equal to 1.

24. The control method according to claim 7,

detecting upper water temperature and lower water temperature in the water tank, weighting according to the upper water temperature and the lower water temperature to obtain the water temperature in the water tank, wherein the weight during weighting is determined based on the change of the upper water temperature.

25. The control method according to claim 8,

26. The control method according to claim 24 or 25,

when the upper water temperature is in a first upper water temperature zone, the weight occupied by the weight of the upper water temperature is a first weight,

when the upper water temperature is in a second upper water temperature zone, the weight occupied by the weight of the upper water temperature is a second weight,

the first weight is greater than the second weight when the minimum value of the first upper water temperature interval is greater than the maximum value of the second upper water temperature interval.

27. The control method according to claim 26,

and performing temperature compensation on the water temperature in the water tank obtained by weighting the upper water temperature and the lower water temperature to obtain the final water temperature, wherein a compensation value during temperature compensation is determined based on the temperature difference between the upper water temperature and the lower water temperature.

28. The control method according to claim 27, wherein the temperature difference between the upper water temperature and the lower water temperature is positively correlated with the compensation value.

29. A control device comprising a processor, characterized in that the processor is configured to perform the control method of the heating device of any one of claims 1 to 28.

30. A heating device, characterized in that the heating device comprises a control device according to claim 29.

31. The heating device of claim 30, wherein the heating device comprises an electric water heater and/or a gas water heater.

32. The heating device of claim 31, wherein when the heating device is an electric water heater, the heating device comprises a water tank and a plurality of heating units located within the water tank.

33. The heating device of claim 32, wherein the heating unit is a heating rod, and the plurality of heating rods are of the same power and of constant power.

34. The heating apparatus as claimed in claim 33, further comprising at least two temperature sensors for detecting an upper water temperature and a lower water temperature of the water tank, respectively.