Control method and system of water heater, water heater and medium

Abstract

The application discloses a kind of control method, system, water heater and medium of water heater, the control method includes: the output power of control water pump is increased gradually, until the flow difference between the water flow corresponding to the output power of water pump next level and the water flow corresponding to current output power is not greater than first preset threshold;In response to actual outlet water temperature and target outlet water temperature are different, adjust the combustion state of water heater according to the temperature difference between actual outlet water temperature and target outlet water temperature;In response to combustion state adjustment to maximum or minimum, actual outlet water temperature is still different from target outlet water temperature, adjust the output power of water pump according to the temperature difference between actual outlet water temperature and target outlet water temperature.The application adjusts the output power of water pump in real time according to the different water flow corresponding to the different output power of water pump and the temperature difference between actual outlet water temperature and target outlet water temperature, so that the output power of water pump can meet actual demand, improve the use experience of user.

Description

Technical Field

[0001] This invention belongs to the field of water heaters, specifically relating to a control method, system, water heater, and medium for a water heater. Background Technology

[0002] To meet users' demand for large water volumes, water heaters with booster functions have been introduced to the market. However, existing water heaters generally use pumps with fixed output power to achieve this booster function. Therefore, these heaters cannot determine the initial output power of the pump based on different piping conditions, nor can they adjust the pump's output power in real time according to different conditions such as water and gas connections during use. This results in the pump's output power failing to meet actual needs, leading to a significant difference between the actual outlet water temperature and the user's target temperature, thus reducing the user experience. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art in which water heaters generally use water pumps with fixed output power to realize the pressurization function of water heaters, which makes the output power of water pumps unable to meet the actual needs, and the actual outlet water temperature of water heaters is far from the target outlet water temperature set by the user, thus reducing the user experience. The present invention provides a control method, system, water heater and medium for water heaters.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] This invention provides a control method for a water heater, the water heater including a water pump and a water outlet, the control method comprising:

[0006] In response to the water heater entering the working state, the water pump is controlled to start;

[0007] The output power of the water pump is controlled to increase step by step until the flow rate difference between the water flow rate at the outlet corresponding to the next level of output power and the water flow rate at the outlet corresponding to the current output power is not greater than a first preset threshold.

[0008] Detect the actual water temperature at the outlet;

[0009] In response to the difference between the actual outlet water temperature and the target outlet water temperature, the combustion state of the water heater is adjusted according to the temperature difference between the actual outlet water temperature and the target outlet water temperature.

[0010] In response to the combustion state being adjusted to maximum or minimum, the actual water temperature at the outlet is still different from the target water temperature. The output power of the water pump is adjusted according to the temperature difference between the actual water temperature at the outlet and the target water temperature.

[0011] Optionally, the control method further includes:

[0012] In response to the fact that the actual water temperature at the outlet is the same as the target water temperature, the actual water flow rate at the outlet is detected twice at a preset time interval to calculate the change in the actual water flow rate at the outlet.

[0013] In response to the absolute value of the change not being greater than a second preset threshold, the output power of the water pump remains unchanged;

[0014] In response to the absolute value of the change being greater than a second preset threshold, the output power of the water pump is adjusted according to the change.

[0015] Optionally, the step of adjusting the combustion state of the water heater based on the temperature difference between the actual outlet water temperature and the target outlet water temperature specifically includes:

[0016] In response to the actual outlet water temperature being greater than the target outlet water temperature, the combustion state of the water heater is reduced;

[0017] In response to the actual water temperature at the outlet being lower than the target water temperature, the combustion state of the water heater is enhanced.

[0018] Optionally, the step of adjusting the output power of the water pump based on the temperature difference between the actual outlet water temperature and the target outlet water temperature specifically includes:

[0019] In response to the actual outlet water temperature being greater than the target outlet water temperature, the output power of the water pump is increased;

[0020] In response to the actual outlet water temperature being lower than the target outlet water temperature, the output power of the water pump is reduced.

[0021] Optionally, the step of reducing the output power of the water pump in response to the actual outlet water temperature being lower than the target outlet water temperature specifically includes:

[0022] In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature not being less than a third preset threshold, the output power of the water pump is adjusted to the minimum.

[0023] In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than a third preset threshold and not less than a fourth preset threshold, the target outlet water flow rate is calculated based on the actual outlet water temperature, the inlet water temperature of the water heater, the water flow rate at the outlet water temperature, and the target outlet water temperature. Then, the output power of the water pump is adjusted to the output power corresponding to the target outlet water flow rate.

[0024] In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than a fourth preset threshold and not less than a fifth preset threshold, the output power of the water pump is gradually reduced.

[0025] In response to the temperature difference between the actual water temperature at the outlet and the target water temperature being less than a fifth preset threshold, it is determined that the actual water temperature at the outlet is the same as the target water temperature.

[0026] Optionally, the step of controlling the water pump to start in response to the water heater entering the working state further includes:

[0027] Control the water heater to start;

[0028] Control the water heater to activate its pressurization function;

[0029] Detect the initial water flow rate at the outlet;

[0030] In response to the initial water flow rate being not less than the preset start-up flow rate, the water heater is determined to enter the working state;

[0031] In response to the initial water flow rate being less than the preset start-up flow rate, the water heater is determined to enter standby mode.

[0032] Optionally, the step of adjusting the output power of the water pump according to the change value in response to the absolute value of the change being greater than a second preset threshold specifically includes:

[0033] In response to a positive change value, the output power of the water pump is reduced;

[0034] In response to the change being negative, the output power of the water pump is increased.

[0035] The present invention also provides a control system for a water heater, the water heater including a water pump and a water outlet, the control system including:

[0036] The first control module is used to control the water pump to start in response to the water heater entering the working state;

[0037] The second control module is used to control the output power of the water pump to increase step by step until the flow rate difference between the water flow rate of the outlet corresponding to the next level of output power and the water flow rate of the outlet corresponding to the current output power is not greater than a first preset threshold.

[0038] The detection module is used to detect the actual water temperature at the outlet.

[0039] The third control module is used to adjust the combustion state of the water heater according to the temperature difference between the actual outlet water temperature and the target outlet water temperature in response to the difference between the actual outlet water temperature and the target outlet water temperature.

[0040] The fourth control module is used to adjust the output power of the water pump in response to the combustion state being adjusted to the maximum or minimum, where the actual water temperature at the outlet is still different from the target water temperature.

[0041] The present invention also provides a water heater, including a memory, a processor, and a computer program stored in the memory and used to run on the processor, wherein the processor executes the computer program to implement the aforementioned water heater control method.

[0042] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the aforementioned water heater control method.

[0043] The positive and progressive effects of this invention are as follows: This invention provides a control method for a water heater. This control method determines the output power of the water pump according to different pipeline conditions. Specifically, it determines the output power of the water pump according to the different water flow rates corresponding to different output powers. Furthermore, it adjusts the output power of the water pump in real time according to different conditions such as water and gas lines. Specifically, it adjusts the output power of the water pump in real time according to the temperature difference between the actual outlet water temperature and the target outlet water temperature. The combination of these two methods ensures that the output power of the water pump meets actual needs, and the actual outlet water temperature of the water heater reaches the target outlet water temperature set by the user, thereby improving the user experience. Attached Figure Description

[0044] Figure 1 A flowchart of a water heater control method provided in Embodiment 1 of the present invention.

[0045] Figure 2 This is a schematic diagram of the control system of a water heater provided in Embodiment 2 of the present invention.

[0046] Figure 3 This is a schematic diagram of the structure of a water heater provided in Embodiment 3 of the present invention. Detailed Implementation

[0047] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0048] Example 1

[0049] This embodiment provides a control method for a water heater, which includes a water pump and a water outlet, such as... Figure 1As shown, the control method includes the following steps:

[0050] S101, In response to the water heater entering the working state, control the water pump to start.

[0051] S102. Control the output power of the water pump to increase step by step until the flow rate difference between the water flow rate of the outlet corresponding to the next level of output power and the water flow rate of the outlet corresponding to the current output power is not greater than the first preset threshold.

[0052] Specifically, after the water pump is turned on, its output power is increased step by step. The increment of output power between each two steps can be determined according to the actual situation, and this embodiment does not impose any restrictions on it. During the process of gradually increasing the output power of the water pump, after the output power of the water pump stays at each step for a duration of t1, the water flow rate at the outlet is measured to obtain the water flow rate at the outlet corresponding to the output power of the current level. Here, t1 is the time that can stabilize the water flow rate at the outlet, and the specific value of t1 can be determined according to the characteristics of the water pump and the actual situation, and this embodiment does not impose any restrictions on it. If the flow rate difference between the outlet flow rate corresponding to the next level of output power and the outlet flow rate corresponding to the current output power is not greater than the first preset threshold, it indicates that the pump output power has increased, but the increase in flow rate is small. It is unnecessary to increase the pump output power for such a small increase, so the pump output power is controlled to stop increasing step by step, and the current level output power is used as the pump output power. If the flow rate difference between the outlet flow rate corresponding to the next level of output power and the outlet flow rate corresponding to the current output power is greater than the first preset threshold, it indicates that the output power has increased, and the increase in flow rate is large. Therefore, the pump output power is controlled to continue increasing step by step. By judging step by step, a suitable output power can be selected. If each judgment result shows that the flow rate difference between the outlet flow rate corresponding to the next level of output power and the outlet flow rate corresponding to the current output power is greater than the first preset threshold, then the pump output power is controlled to increase until the highest level to increase the water flow rate of the water heater. The value of the first preset threshold can be determined according to actual conditions, for example, 0.2L; this embodiment does not impose any restrictions on this.

[0053] S103. Detect the actual water temperature at the outlet.

[0054] S104. In response to the difference between the actual outlet water temperature and the target outlet water temperature, the combustion state of the water heater is adjusted according to the temperature difference between the actual outlet water temperature and the target outlet water temperature.

[0055] S105. In response to the combustion state being adjusted to the maximum or minimum, the actual water temperature at the outlet is still different from the target water temperature. The output power of the water pump is adjusted according to the temperature difference between the actual water temperature at the outlet and the target water temperature.

[0056] This embodiment provides a control method for a water heater. This method determines the output power of the water pump based on different pipeline conditions. Specifically, it determines the output power of the water pump based on the different water flow rates corresponding to different output powers. Furthermore, it adjusts the output power of the water pump in real time based on different conditions such as water and gas lines. Specifically, it adjusts the output power of the water pump in real time based on the temperature difference between the actual outlet water temperature and the target outlet water temperature. Combining these two methods ensures that the output power of the water pump meets actual needs, and that the actual outlet water temperature of the water heater reaches the target outlet water temperature set by the user, thereby improving the user experience.

[0057] In one optional implementation, the control method further includes the following steps:

[0058] S106. In response to the fact that the actual water temperature at the outlet is the same as the target water temperature, the actual water flow rate at the outlet is detected twice before and after a preset time interval to calculate the change value of the actual water flow rate at the outlet.

[0059] S107. In response to the absolute value of the change not being greater than the second preset threshold, the output power of the water pump remains unchanged.

[0060] S108. In response to the absolute value of the change being greater than the second preset threshold, the output power of the water pump is adjusted according to the change.

[0061] Specifically, the value of the second preset threshold can be determined according to the actual situation, such as 0.5L, but this embodiment does not impose any restrictions on it. Adjusting the output power of the water pump according to the change value can make the water flow rate tend to be stable.

[0062] In one optional implementation, step S104 specifically includes:

[0063] S1041. In response to the actual outlet water temperature being greater than the target outlet water temperature, the combustion state of the water heater is reduced.

[0064] S1042. In response to the actual outlet water temperature being lower than the target outlet water temperature, the combustion state of the water heater is enhanced.

[0065] Specifically, adjust the combustion state of the water heater according to the relationship between the actual outlet water temperature and the target outlet water temperature. First, adjust the combustion state of the water heater. If the combustion state is adjusted to the maximum or minimum and the actual outlet water temperature of the outlet is still different from the target outlet water temperature, then adjust the output power of the water pump. If the actual outlet water temperature of the outlet can be made the same as the target outlet water temperature by increasing or decreasing the combustion state of the water heater, then there is no need to adjust the output power of the water pump.

[0066] In an optional implementation manner, step S105 specifically includes:

[0067] S1051. In response to the actual outlet water temperature of the outlet being greater than the target outlet water temperature, increase the output power of the water pump.

[0068] S1052. In response to the actual outlet water temperature of the outlet being less than the target outlet water temperature, decrease the output power of the water pump.

[0069] In an optional implementation manner, step S1052 specifically includes:

[0070] S10521. In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being not less than the third preset threshold, adjust the output power of the water pump to the minimum.

[0071] S10522. In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than the third preset threshold and not less than the fourth preset threshold, calculate the target outlet water flow according to the actual outlet water temperature, the inlet water temperature of the water heater, the water flow of the outlet, and the target outlet water temperature, and then adjust the output power of the water pump to the output power corresponding to the target outlet water flow.

[0072] S10523. In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than the fourth preset threshold and not less than the fifth preset threshold, gradually decrease the output power of the water pump.

[0073] S10524. In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than the fifth preset threshold, determine that the actual outlet water temperature is the same as the target outlet water temperature.

[0074] Specifically, if T1 - T2 ≥ T3, then adjust the output power of the water pump to the minimum; if T4 ≤ T_{1}-T_{2}<T3, calculate the target outlet water flow according to the actual outlet water temperature, the inlet water temperature of the water heater, the water flow of the outlet, and the target outlet water temperature, and then adjust the output power of the water pump to the output power corresponding to the target outlet water flow; if T5 ≤ T_{1}-T_{2}<T4, decrease the output power of the water pump; if T_{1}-T_{2}<T5, determine that the actual outlet water temperature is the same as the target outlet water temperature.

[0075] Wherein, T1 represents the target outlet water temperature, T2 represents the actual outlet water temperature, T3 represents the third preset threshold, T4 represents the fourth preset threshold, and T5 represents the fifth preset threshold. The values ​​of T3, T4, and T5 can be determined according to the actual situation. For example, T3 = 8℃, T4 = 5℃, and T5 = 3℃. This embodiment does not impose any restrictions on this.

[0076] Specifically, the actual combustion load of the water heater can be calculated using the following formula, and then the target water flow rate can be calculated based on the actual combustion load of the water heater:

[0077] P = (T2 - T6) * F1

[0078] F2 = P / (T1 - T6)

[0079] Where P represents the actual combustion load, T6 represents the inlet water temperature, F1 represents the actual outlet water flow rate, and F2 represents the target outlet water flow rate.

[0080] In one optional implementation, the method further includes the following step before step S101:

[0081] S0101, Control the water heater to start.

[0082] S0102. Control the water heater's pressurization function to be activated.

[0083] S0103. Detect the initial outflow rate of the water outlet.

[0084] S0104. In response to the initial water flow rate being not less than the preset start-up flow rate, the water heater is confirmed to enter the working state.

[0085] Specifically, once the water heater is confirmed to be in working condition, if the water heater has an icon that displays its working status, the icon can be turned on.

[0086] S0105. In response to the initial water flow rate being less than the preset start-up flow rate, the water heater is determined to enter standby mode.

[0087] In one optional implementation, step S108 specifically includes:

[0088] S1081. In response to a positive change value, reduce the output power of the water pump.

[0089] S1082. In response to a negative change value, increase the output power of the water pump.

[0090] Specifically, if the change value is positive, the trend of the water flow rate is determined to be increasing; if the change value is negative, the trend of the water flow rate is determined to be decreasing. Adjusting the output power of the water pump according to the change value can stabilize the water flow rate.

[0091] Example 2

[0092] This embodiment provides a control system for a water heater, which includes a water pump and a water outlet, such as... Figure 2 As shown, the control system 20 of the water heater includes a first control module 21, a second control module 22, a detection module 23, a third control module 24, and a fourth control module 25.

[0093] The first control module is used to control the water pump to start in response to the water heater entering the working state.

[0094] The second control module is used to control the output power of the water pump to increase step by step until the flow rate difference between the outlet flow rate corresponding to the next level of output power and the outlet flow rate corresponding to the current output power is not greater than the first preset threshold.

[0095] Specifically, after the water pump is turned on, the second control module controls the output power of the water pump to increase step by step. The increment of output power between each two steps can be determined according to the actual situation, and this embodiment does not impose any restrictions on it. During the process of controlling the output power of the water pump to increase step by step, after the output power of the water pump stays at each step for a duration of t1, the water flow rate at the outlet is measured to obtain the water flow rate at the outlet corresponding to the output power of the current level; where t1 is the time that can stabilize the water flow rate at the outlet, the specific value of t1 can be determined according to the characteristics of the water pump and the actual situation, and this embodiment does not impose any restrictions on it. If the flow rate difference between the outlet flow rate corresponding to the next level of output power and the outlet flow rate corresponding to the current output power is not greater than the first preset threshold, it indicates that the pump output power has increased, but the increase in flow rate is small. It is unnecessary to increase the pump output power for such a small increase, so the pump output power is controlled to stop increasing step by step, and the current level output power is used as the pump output power. If the flow rate difference between the outlet flow rate corresponding to the next level of output power and the outlet flow rate corresponding to the current output power is greater than the first preset threshold, it indicates that the output power has increased, and the increase in flow rate is large. Therefore, the pump output power is controlled to continue increasing step by step. By judging step by step, a suitable output power can be selected. If each judgment result shows that the flow rate difference between the outlet flow rate corresponding to the next level of output power and the outlet flow rate corresponding to the current output power is greater than the first preset threshold, then the pump output power is controlled to increase until the highest level to increase the water flow rate of the water heater. The value of the first preset threshold can be determined according to actual conditions, for example, 0.2L; this embodiment does not impose any restrictions on this.

[0096] The detection module is used to detect the actual water temperature at the outlet.

[0097] The third control module is used to adjust the combustion state of the water heater in response to the difference between the actual outlet water temperature and the target outlet water temperature.

[0098] The fourth control module is used to adjust the water pump output power according to the temperature difference between the actual water temperature at the outlet and the target water temperature, even though the actual water temperature at the outlet is still different from the target water temperature.

[0099] This embodiment provides a control system for a water heater. This control system determines the output power of the water pump based on different pipeline conditions. Specifically, it determines the output power of the water pump based on the different water flow rates corresponding to different output powers. Furthermore, it adjusts the output power of the water pump in real time based on different conditions such as water and gas lines. Specifically, it adjusts the output power of the water pump in real time based on the temperature difference between the actual outlet water temperature and the target outlet water temperature. Combining these two methods ensures that the output power of the water pump meets actual needs, and that the actual outlet water temperature of the water heater reaches the target outlet water temperature set by the user, thereby improving the user experience.

[0100] In one optional embodiment, the control system further includes a fifth control module, which is configured to: detect the actual water flow rate of the outlet twice at preset time intervals in response to the actual water temperature at the outlet being the same as the target water temperature, so as to calculate the change value of the actual water flow rate at the outlet; keep the output power of the water pump unchanged in response to the absolute value of the change value not being greater than a second preset threshold; and adjust the output power of the water pump according to the change value in response to the absolute value of the change value being greater than the second preset threshold.

[0101] Specifically, the value of the second preset threshold can be determined according to the actual situation, such as 0.5L, but this embodiment does not impose any restrictions on it. Adjusting the output power of the water pump according to the change value can make the water flow rate tend to be stable.

[0102] In one optional implementation, the third control module is specifically used to: reduce the combustion state of the water heater in response to the actual outlet water temperature being greater than the target outlet water temperature; and to enhance the combustion state of the water heater in response to the actual outlet water temperature being less than the target outlet water temperature.

[0103] Specifically, the combustion state of the water heater is adjusted according to the relationship between the actual outlet water temperature and the target outlet water temperature. First, the combustion state of the water heater is adjusted. If the actual outlet water temperature is still different from the target outlet water temperature when the combustion state is adjusted to the maximum or minimum, then the output power of the water pump is adjusted. If the actual outlet water temperature can be the same as the target outlet water temperature by increasing or decreasing the combustion state of the water heater, then there is no need to adjust the output power of the water pump.

[0104] In an optional implementation, the fourth control module is specifically configured to: in response to the actual outlet water temperature being greater than the target outlet water temperature, increase the output power of the water pump; in response to the actual outlet water temperature being less than the target outlet water temperature, decrease the output power of the water pump.

[0105] In an optional implementation, the fourth control module is further specifically configured to: in response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being not less than a third preset threshold, adjust the output power of the water pump to the minimum; in response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than the third preset threshold and not less than a fourth preset threshold, calculate the target outlet water flow based on the actual outlet water temperature, the inlet water temperature of the water heater, the water flow rate at the outlet, and the target outlet water temperature, and then adjust the output power of the water pump to the output power corresponding to the target outlet water flow; in response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than the fourth preset threshold and not less than a fifth preset threshold, decrease the output power of the water pump; in response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than the fifth preset threshold, determine that the actual outlet water temperature is the same as the target outlet water temperature.

[0106] Specifically, if T1 - T2 ≥ T3, then adjust the output power of the water pump to the minimum; if T4 ≤ T1 - T2 < T3, then calculate the target outlet water flow based on the actual outlet water temperature, the inlet water temperature of the water heater, the water flow rate at the outlet, and the target outlet water temperature, and then adjust the output power of the water pump to the output power corresponding to the target outlet water flow; if T5 ≤ T1 - T2 < T4, then decrease the output power of the water pump; if T1 - T2 < T5, then determine that the actual outlet water temperature is the same as the target outlet water temperature.

[0107] Where, T1 represents the target outlet water temperature, T2 represents the actual outlet water temperature, T3 represents the third preset threshold, T4 represents the fourth preset threshold, T5 represents the fifth preset threshold, and the values of T3, T4, and T5 can be determined according to the actual situation. For example, T3 = 8°C, T4 = 5°C, T5 = 3°C, and this embodiment does not limit this.

[0108] Specifically, the actual combustion load of the water heater can be calculated according to the following formula, and then the target outlet water flow can be calculated based on the actual combustion load of the water heater:

[0109] P = (T2 - T6) * F1

[0110] F2 = P / (T1 - T6)

[0111] Where, P represents the actual combustion load, T6 represents the inlet water temperature, F1 represents the actual outlet water flow, and F2 represents the target outlet water flow.

[0112] In one optional implementation, the control system further includes a startup module, which is used to: control the water heater to start; control the water heater to activate its pressurization function; detect the initial water flow rate at the outlet; determine that the water heater has entered the working state in response to the initial water flow rate being not less than the preset start-up flow rate; and determine that the water heater has entered the standby state in response to the initial water flow rate being less than the preset start-up flow rate.

[0113] Specifically, once the water heater is confirmed to be in working condition, if the water heater has an icon that displays its working status, the icon can be turned on.

[0114] In one alternative implementation, the fifth control module is specifically configured to: decrease the output power of the water pump in response to a positive change value; and increase the output power of the water pump in response to a negative change value.

[0115] Specifically, if the change value is positive, the trend of the water flow rate is determined to be increasing; if the change value is negative, the trend of the water flow rate is determined to be decreasing. Adjusting the output power of the water pump according to the change value can stabilize the water flow rate.

[0116] Example 3

[0117] Figure 3 This is a schematic diagram of a water heater according to Embodiment 3 of the present invention. It includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the control method for the water heater described in Embodiment 1. Figure 3 The water heater 30 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of the present invention.

[0118] The water heater 30 can be represented as a general-purpose computing device, such as a server device. The components of the water heater 30 may include, but are not limited to: at least one processor 31, at least one memory 32, and a bus 33 connecting different system components (including memory 32 and processor 31).

[0119] Bus 33 includes a data bus, an address bus, and a control bus.

[0120] The memory 32 may include volatile memory, such as random access memory (RAM) 321 and / or cache memory 322, and may further include read-only memory (ROM) 323.

[0121] The memory 32 may also include a program / utility 325 having a set (at least one) of program modules 324, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0122] The processor 31 executes various functional applications and data processing by running computer programs stored in the memory 32, such as the water heater control method of Embodiment 1 of the present invention.

[0123] The water heater 30 can also communicate with one or more external devices 34 (e.g., keyboard, pointing device, etc.). This communication can be performed via input / output (I / O) interface 35. Furthermore, the model-generated device 30 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 36. As shown, network adapter 36 communicates with other modules of the model-generated device 30 via bus 33. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the model-generated device 30, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0124] It should be noted that although several units / modules or sub-units / modules of the electronic device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0125] Example 4

[0126] The present invention also provides a computer-readable medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the water heater control method of the aforementioned embodiment 1.

[0127] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.

[0128] In a possible implementation, the present invention can also be implemented as a program product comprising program code, which, when the program product is run on a terminal device, causes the terminal device to execute the control method for the water heater of Embodiment 1.

[0129] The program code for executing the present invention can be written in any combination of one or more programming languages. The program code can be executed entirely on the user device, partially on the user device, as a standalone software package, partially on the user device and partially on a remote device, or entirely on a remote device.

[0130] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for controlling a water heater, characterized in that, The water heater includes a water pump and a water outlet, and the control method includes: In response to the water heater entering the working state, the water pump is controlled to start; The output power of the water pump is controlled to increase step by step until the flow rate difference between the outlet flow rate corresponding to the next level of output power and the outlet flow rate corresponding to the current output power is not greater than a first preset threshold. If the flow rate difference between the outlet flow rate corresponding to the next level of output power and the outlet flow rate corresponding to the current output power is not greater than the first preset threshold, it indicates that the output power of the water pump is increasing but the increase in the flow rate is small. Then the output power of the water pump is controlled to stop increasing step by step, and the output power of the current level is used as the output power of the water pump. Detect the actual water temperature at the outlet; In response to the difference between the actual outlet water temperature and the target outlet water temperature, the combustion state of the water heater is adjusted according to the temperature difference between the actual outlet water temperature and the target outlet water temperature. In response to the combustion state being adjusted to the maximum or minimum, the actual water temperature at the outlet is still different from the target water temperature. The output power of the water pump is adjusted according to the temperature difference between the actual water temperature at the outlet and the target water temperature. The step of adjusting the combustion state of the water heater based on the temperature difference between the actual outlet water temperature and the target outlet water temperature specifically includes: In response to the actual outlet water temperature being greater than the target outlet water temperature, the combustion state of the water heater is reduced; In response to the actual water temperature at the outlet being lower than the target water temperature, the combustion state of the water heater is enhanced.

2. The water heater control method as described in claim 1, characterized in that, The control method further includes: In response to the fact that the actual water temperature at the outlet is the same as the target water temperature, the actual water flow rate at the outlet is detected twice at a preset time interval to calculate the change in the actual water flow rate at the outlet. In response to the absolute value of the change not being greater than a second preset threshold, the output power of the water pump remains unchanged; In response to the absolute value of the change being greater than a second preset threshold, the output power of the water pump is adjusted according to the change.

3. The water heater control method as described in claim 1, characterized in that, The step of adjusting the output power of the water pump based on the temperature difference between the actual outlet water temperature and the target outlet water temperature specifically includes: In response to the actual outlet water temperature being greater than the target outlet water temperature, the output power of the water pump is increased; In response to the actual outlet water temperature being lower than the target outlet water temperature, the output power of the water pump is reduced.

4. The water heater control method as described in claim 3, characterized in that, The step of reducing the output power of the water pump in response to the actual outlet water temperature being lower than the target outlet water temperature specifically includes: In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature not being less than a third preset threshold, the output power of the water pump is adjusted to the minimum. In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than a third preset threshold and not less than a fourth preset threshold, the target outlet water flow rate is calculated based on the actual outlet water temperature, the inlet water temperature of the water heater, the water flow rate at the outlet water temperature, and the target outlet water temperature. Then, the output power of the water pump is adjusted to the output power corresponding to the target outlet water flow rate. In response to the temperature difference between the actual outlet water temperature and the target outlet water temperature being less than a fourth preset threshold and not less than a fifth preset threshold, the output power of the water pump is gradually reduced. In response to the temperature difference between the actual water temperature at the outlet and the target water temperature being less than a fifth preset threshold, it is determined that the actual water temperature at the outlet is the same as the target water temperature.

5. The control method for a water heater as described in claim 1, characterized in that, Prior to the step of controlling the water pump to start in response to the water heater entering the working state, the method further includes: Control the water heater to start; Control the water heater to activate its pressurization function; Detect the initial water flow rate at the outlet; In response to the initial water flow rate being not less than the preset start-up flow rate, the water heater is determined to enter the working state; In response to the initial water flow rate being less than the preset start-up flow rate, the water heater is determined to enter standby mode.

6. The water heater control method as described in claim 2, characterized in that, The step of adjusting the output power of the water pump in response to the absolute value of the change being greater than a second preset threshold specifically includes: In response to a positive change value, the output power of the water pump is reduced; In response to the change being negative, the output power of the water pump is increased.

7. A control system for a water heater, characterized in that, The water heater includes a water pump and a water outlet, and the control system includes: The first control module is used to control the water pump to start in response to the water heater entering the working state; The second control module is used to control the output power of the water pump to increase step by step until the flow rate difference between the water flow rate of the outlet corresponding to the next level of output power and the water flow rate of the outlet corresponding to the current output power is not greater than a first preset threshold. If the flow rate difference between the water flow rate of the outlet corresponding to the next level of output power and the water flow rate of the outlet corresponding to the current output power is not greater than the first preset threshold, it indicates that the output power of the water pump is increasing and the increase in water flow rate is small. Then, the output power of the water pump is controlled to stop increasing step by step, and the output power of the current level is used as the output power of the water pump. The detection module is used to detect the actual water temperature at the outlet. The third control module is used to adjust the combustion state of the water heater according to the temperature difference between the actual outlet water temperature and the target outlet water temperature in response to the difference between the actual outlet water temperature and the target outlet water temperature. The fourth control module is used to adjust the output power of the water pump in response to the combustion state being adjusted to the maximum or minimum, where the actual water temperature at the outlet is still different from the target water temperature. The third control module is specifically used to: reduce the combustion state of the water heater in response to the actual water temperature at the outlet being greater than the target water temperature; and to enhance the combustion state of the water heater in response to the actual water temperature at the outlet being less than the target water temperature.

8. A water heater, comprising a memory, a processor, and a computer program stored in the memory and used to run on the processor, characterized in that, When the processor executes the computer program, it implements the control method for the water heater as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control method for the water heater as described in any one of claims 1 to 6.

Images