Constant temperature control method, device and equipment of water heater and storage medium

Abstract

The invention relates to the technical field of water heaters, and provides a constant-temperature control method, device and equipment for a water heater and a storage medium. The method comprises the steps that the water inlet temperature, the water outlet flow and the preset constant temperature of the water heater are obtained; based on the water inlet temperature, the water outlet flow and the preset constant temperature, estimated required power is obtained; searching a target adjustment result corresponding to the estimated required power from a preset power adjustment mapping table; and the temperature of the water heater is adjusted based on the target adjusting result. According to the constant-temperature control method of the water heater, the constant-temperature adjusting speed of the water heater can be increased.

Description

Technical Field

[0001] The present application relates to the technical field of water heaters, and in particular to a constant temperature control method, device, equipment and storage medium for a water heater. Background Art

[0002] Energy storage heat exchange electric water heaters can provide constant temperature hot water when users need it by storing pre-heated hot water, thereby improving the user experience.

[0003] The relevant constant temperature control scheme mainly achieves constant temperature by directly adjusting the mixing valve and turning on the heater based on the data collected by the sensor. For example, in order to avoid overheating, the mixing valve is adjusted first and then the heater is turned on.

[0004] However, the mixing valve can only adjust the water temperature by mixing cold water and hot water, and cannot actively heat cold water. Therefore, if you only rely on the mixing valve for temperature adjustment at the beginning without activating the instant heater, it will take a long time to reach the target temperature, and too long a constant temperature time will affect the user experience. Summary of the invention

[0005] The embodiments of the present application provide a constant temperature control method, device, equipment and storage medium for a water heater, aiming to solve the problem of a relatively long constant temperature time of the water heater.

[0006] In a first aspect, an embodiment of the present application provides a constant temperature control method for a water heater, the method comprising:

[0007] Get the water inlet temperature, water outlet flow rate and preset constant temperature of the water heater;

[0008] Obtaining an estimated required power based on the water inlet temperature, the water outlet flow rate, and the preset constant temperature;

[0009] Searching for a target adjustment result corresponding to the estimated required power from a preset power adjustment mapping table;

[0010] The temperature of the water heater is adjusted based on the target adjustment result.

[0011] In some embodiments, after the water heater is thermostatically controlled based on the target adjustment result, the method further includes:

[0012] Obtain the adjusted outlet water temperature;

[0013] Determining whether the adjusted water outlet temperature is equal to a preset constant temperature;

[0014] If the adjusted water outlet temperature is not equal to the preset constant temperature, the water heater is fine-tuned.

[0015] In some embodiments, the water heater is provided with an instantaneous heater, and the fine-tuning of the water heater comprises:

[0016] Adjusting the output power of the instant heater and obtaining a first adjusted water outlet temperature obtained after the adjustment;

[0017] Determining whether the first adjusted water outlet temperature is equal to the preset constant temperature;

[0018] If the first adjusted water outlet temperature is equal to the preset constant temperature, the water heater is controlled to operate at a constant temperature based on the first adjusted water outlet temperature.

[0019] In some embodiments, the water heater is provided with a water mixing valve, and the water mixing valve is provided at the water outlet of the water heater, and the determining whether the first adjusted water outlet temperature is equal to the preset constant temperature further includes:

[0020] If the first adjusted water outlet temperature is not equal to the preset constant temperature, the water mixing valve is adjusted to perform temperature compensation until the compensated first adjusted water outlet temperature is equal to the preset constant temperature.

[0021] In some embodiments, after adjusting the temperature of the water heater based on the target adjustment result, the method further includes:

[0022] Obtain the change in inlet water temperature after adjustment;

[0023] Determine whether the adjusted water inlet temperature change is greater than or equal to the preset temperature value; if the adjusted water inlet temperature change is greater than or equal to the preset temperature value, return to the step of obtaining the estimated required power based on the water inlet temperature, the water outlet flow rate and the preset constant temperature.

[0024] In some embodiments, the determining whether the adjusted change in the inlet water temperature is greater than or equal to a preset temperature value further includes:

[0025] If the adjusted water inlet temperature change is less than the preset temperature value, obtaining the adjusted water flow change;

[0026] Determining whether the adjusted water flow change is greater than or equal to a preset water flow rate;

[0027] If the adjusted water flow change is greater than or equal to the preset water flow rate, the process returns to the step of obtaining the estimated required power based on the water inlet temperature, the water outlet flow rate and the preset constant temperature.

[0028] In some embodiments, the preset power adjustment mapping table includes the instantaneous heating heater power and the mixing valve adjustment step corresponding to each preset power interval; the target adjustment result includes the target power of the instantaneous heating heater and the target adjustment step of the mixing valve;

[0029] The step of adjusting the temperature of the water heater based on the target adjustment result includes:

[0030] The temperature of the water heater is adjusted according to the target power of the instantaneous heater and the target adjustment step of the water mixing valve.

[0031] In a second aspect, an embodiment of the present application further provides a constant temperature control device for a water heater, which includes a unit for executing the above method.

[0032] In a third aspect, an embodiment of the present application further provides a computer device, which includes a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the above method when executing the computer program.

[0033] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program can implement the above method when executed by a processor.

[0034] The embodiment of the present application provides a constant temperature control method, device, equipment and storage medium for a water heater. The method includes: obtaining the water inlet temperature, water outlet flow rate and preset constant temperature of the water heater; obtaining an estimated required power based on the water inlet temperature, the water outlet flow rate and the preset constant temperature; searching for a target adjustment result corresponding to the estimated required power from a preset power adjustment mapping table; and adjusting the temperature of the water heater based on the target adjustment result. In the embodiment of the present application, since the preset power adjustment mapping table is prepared in advance, the most suitable adjustment strategy, i.e., the target adjustment result corresponding to the estimated required power, can be quickly searched directly from the preset power adjustment mapping table according to the calculated estimated required power. The target adjustment result can be adjusted in one step according to the target adjustment result, which shortens the adjustment time and thus improves the speed of constant temperature adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0037] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0038] Figure 1 A schematic diagram of the structure of a constant temperature control system for a water heater provided in an embodiment of the present application;

[0039] Figure 2 A schematic flow chart of a first embodiment of a constant temperature control method for a water heater provided by the present application;

[0040] Figure 3 A schematic flow chart of another embodiment of a constant temperature control method for a water heater provided in the present application;

[0041] Figure 4 A schematic diagram of the structure of an embodiment of a computer device provided in the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0044] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0045] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0046] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0047] As used in this specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0048] Energy storage heat exchange electric water heaters can provide constant temperature hot water when users need it by storing pre-heated hot water, thereby improving the user experience.

[0049] The relevant constant temperature control scheme is mainly to directly adjust the mixing valve and turn on the heater to achieve constant temperature based on the data collected by the sensor. There are two specific adjustment methods:

[0050] 1. Immediately turn on the heater and adjust the mixing valve.

[0051] However, the initial instant heater may have too much constant temperature power, which may cause overheating more easily.

[0052] 2. Adjust the mixing valve first, then turn on the heater.

[0053] Although this method can avoid overheating, the mixing valve can only adjust the water outlet temperature by mixing cold water and hot water, and cannot actively heat cold water. Therefore, if you only rely on the mixing valve for temperature adjustment at the beginning and do not enable the instant heater, it will take a long time to reach the target temperature, and too long a constant temperature time will affect the user experience.

[0054] In order to solve the above technical problems in the prior art, the present application provides a constant temperature control method for a water heater, which can improve the speed of constant temperature adjustment.

[0055] First, a brief introduction is given to the constant temperature control system of the water heater provided in this application. Figure 1As shown, the thermostatic control system of the water heater includes a water heater 100 and a controller, and the controller is used to execute the steps of the following embodiment method.

[0056] The water heater 100 includes a heat storage tank 10, a heat exchanger 20, a mixing valve 30, an instant heater 40, an inlet water temperature probe 51, a storage water temperature probe 52, a mixing water temperature probe 53, an outlet water temperature probe 54 and an inlet water valve 60, and the water heater is provided with a water inlet 01 and a water outlet 02.

[0057] A flow sensor may be integrated inside the water inlet valve to measure the water flow velocity and flow rate passing through the water inlet valve.

[0058] The mixing valve is connected to the water inlet and the heat exchanger in the heat storage tank, and is used to adjust the ratio of water and cold water that have undergone heat exchange in the heat storage tank, so as to accurately control the temperature of the mixed water; the hot water heater is provided at the water outlet and connected to the mixing valve, and is used to further heat the mixed water output by the mixing valve, and then output it to the water outlet.

[0059] In some embodiments, the instantaneous heating heater is controlled by a thyristor and the output heat power can be adjusted linearly.

[0060] See also Figure 2 , Figure 2 This is a flow chart of a first embodiment of a constant temperature control method for a water heater provided by the present application, the method comprising:

[0061] Step 110: Obtain the water inlet temperature, water outlet flow rate and preset constant temperature of the water heater.

[0062] Step 120: Obtain an estimated required power based on the water inlet temperature, the water outlet flow rate, and the preset constant temperature.

[0063] Step 130: searching a preset power adjustment mapping table for a target adjustment result corresponding to the estimated required power.

[0064] Step 140: Adjust the temperature of the water heater based on the target adjustment result.

[0065] Since the preset power adjustment mapping table is prepared in advance, according to the calculated estimated demand power, the most suitable adjustment strategy, that is, the target adjustment result corresponding to the estimated demand power, can be quickly found directly from the preset power adjustment mapping table. According to the target adjustment result, the adjustment can be completed in one step, which shortens the adjustment time and thus can improve the speed of constant temperature adjustment.

[0066] In addition, since the present application directly searches for the corresponding adjustment strategy from a preset power adjustment mapping table based on the calculated estimated required power, precise constant temperature can be achieved.

[0067] Referring to the second embodiment of a constant temperature control method for a water heater provided in the present application, the method comprises:

[0068] Step 210: Obtain the water inlet temperature, water outlet flow rate and preset constant temperature of the water heater.

[0069] Step 220: Obtain an estimated required power based on the water inlet temperature, the water outlet flow rate, and the preset constant temperature.

[0070] Step 230: Searching for the target adjustment result corresponding to the estimated required power from a preset power adjustment mapping table.

[0071] Step 240: Adjust the temperature of the water heater based on the target adjustment result.

[0072] Among them, the preset power adjustment mapping table includes the instantaneous heater power and the mixing valve adjustment step corresponding to each preset power interval; the target adjustment result includes the target power of the instantaneous heater and the target adjustment step of the mixing valve. Therefore, step 240 can be to adjust the temperature of the water heater according to the target power of the instantaneous heater and the target adjustment step of the mixing valve.

[0073] For example, the preset power adjustment mapping table is shown in Table 1 below:

[0074] Table 1:

[0075]

[0076] The data in the preset power adjustment mapping table can be obtained according to actual tests. For example, the mixing valve adjustment 0 step (reset point) - 1400 steps can be tested respectively, and an instantaneous heat exchange power can be tested every 200 steps, and then the heat exchange power of an instant heat exchanger can be matched at each mixing valve step point, and the above Table 1 can be obtained.

[0077] Assuming that the estimated demand power is 2KW, it can be seen from Table 1 that 2KW is located at (1KW, ​​3KW]. Therefore, it can be found that the mixing valve adjustment step corresponding to (1KW, ​​3KW) is 200, and the power of the instant heater is B. Then 200 is the target adjustment step of the mixing valve, and B is the target power of the instant heater. Therefore, by adjusting the power of the instant heater in the water heater to B and adjusting the number of steps of the mixing valve to 200, the temperature of the water heater can be adjusted based on the target adjustment result.

[0078] Step 250: Obtain the adjusted outlet water temperature.

[0079] Step 260: Determine whether the adjusted outlet water temperature is equal to the preset constant temperature.

[0080] Step 270: If the adjusted outlet water temperature is not equal to the preset constant temperature, fine-tune the water heater.

[0081] In some embodiments, fine-tuning the water heater may include:

[0082] Step 271: Regulate the output power of the instant heater and obtain a first regulated outlet water temperature obtained after the regulation.

[0083] Step 272: Determine whether the first adjusted outlet water temperature is equal to the preset constant temperature.

[0084] Among them, the preset constant temperature can be 35°C-55°C, which can be set according to actual conditions.

[0085] Step 273: If the first adjusted water outlet temperature is equal to the preset constant temperature, the water heater is controlled to operate at a constant temperature based on the first adjusted water outlet temperature.

[0086] Step 274: If the first adjusted water outlet temperature is not equal to the preset constant temperature, the water mixing valve is adjusted to perform temperature compensation until the compensated first adjusted water outlet temperature is equal to the preset constant temperature.

[0087] Referring to the third embodiment of a constant temperature control method for a water heater provided in the present application, the method comprises:

[0088] Step 310: Obtain the water inlet temperature, water outlet flow rate and preset constant temperature of the water heater.

[0089] Step 320: Obtain an estimated required power based on the water inlet temperature, the water outlet flow rate, and the preset constant temperature.

[0090] Step 330: Searching for the target adjustment result corresponding to the estimated required power from a preset power adjustment mapping table.

[0091] Step 340: Adjust the temperature of the water heater based on the target adjustment result.

[0092] Step 350: Obtain the adjusted change in inlet water temperature.

[0093] Step 360: Determine whether the adjusted inlet water temperature change is greater than or equal to a preset temperature value.

[0094] The preset temperature value may be 2°C-5°C, preferably 3°C, and may be set according to actual conditions.

[0095] Step 370: If the adjusted change in the inlet water temperature is greater than or equal to the preset temperature value, return to the step of obtaining the estimated required power based on the inlet water temperature, the outlet water flow rate and the preset constant temperature.

[0096] Step 380: If the adjusted water inlet temperature change is less than the preset temperature value, the adjusted water flow change is obtained.

[0097] Step 390: Determine whether the adjusted water flow change is greater than or equal to a preset water flow rate.

[0098] Among them, the preset water flow rate can be 1L-2L, preferably 1.5L, and can be set according to actual conditions.

[0099] Step 400: If the adjusted water flow change is greater than or equal to the preset water flow rate, return to the step of obtaining the estimated required power based on the inlet water temperature, the outlet water flow rate and the preset constant temperature.

[0100] Based on the above embodiments, combined with Figure 3 The constant temperature control method of the water heater provided in the present application may include the following steps:

[0101] Step 11: Estimate the required power P1.

[0102] The estimated required power P1 can be obtained based on the acquired water inlet temperature, water outlet flow rate and preset constant temperature of the water heater.

[0103] For example, you can refer to the following formula 1:

[0104] P*t=C*M*Δt, Formula 1 (not considering conversion efficiency).

[0105] Among them, P*t represents the generated electric energy; C*M*Δt represents the temperature energy change caused by the temperature rise generated by the electric energy; P represents the estimated required power of the instant heater; t represents the unit time, which can be understood as 1min here; C represents the specific heat capacity of water, 4.2X103 J / (kg·℃); M represents the mass of water flowing through the instant heater per unit time, which is equivalent to the water flow rate q here and can be read by the flow sensor in the water inlet valve; Δt represents the temperature rise value that the instant heater can bring.

[0106] Step 12: Estimate the required power P1 to match the power range P2.

[0107] For details, please refer to the relevant statements in the above embodiments.

[0108] Step 13: Determine whether Tout is equal to Tsetting.

[0109] That is, it is determined whether the adjusted water outlet temperature Toutwater is equal to the preset constant temperature Tsetting.

[0110] If yes, go to step 15, if no, go to step 14.

[0111] Among them, if Toutwater is not equal to Tsetting, the temperature difference at this time can be calculated, and then the actual power difference can be calculated, and then PID fine-tuning can be performed based on the actual power difference.

[0112] Step 14: PID fine tuning.

[0113] During the PID fine tuning process, the power of the instantaneous heater can be adjusted first. If the power of the instantaneous heater is still not satisfied after adjustment, the mixing valve can be used for compensation adjustment.

[0114] Since the instant heater can directly heat the cold water, while the mixing valve can only adjust the outlet water temperature by mixing hot and cold water, the use of the instant heater first can quickly increase the water temperature, shorten the time to reach a constant temperature, and thus increase the constant temperature speed of the water heater.

[0115] Step 15: Constant temperature and stable operation.

[0116] Step 16: Determine whether the inlet water temperature TinletWaterChange>=3°C.

[0117] That is, it is determined whether the adjusted water inlet temperature change is greater than or equal to the preset temperature value of 3°C.

[0118] If yes, return to step 11, if no, go to step 17.

[0119] Step 17: Determine whether the change in water flow rate q is greater than or equal to 1.5L.

[0120] That is, it is determined whether the adjusted water flow change is greater than or equal to the preset water flow rate of 1.5L.

[0121] If yes, return to step 11; if no, return to step 15.

[0122] That is to say, after the water heater is turned on, the water inlet valve is always in the detection state. When it is detected that a user is using water, that is, when the water inlet valve detects that there is a water flow q passing through, it is determined that someone is using hot water, and the water heater starts the constant temperature process. The controller of the water heater simultaneously reads the water inlet temperature, the water outlet flow and the preset constant temperature of the system. Through mathematical modeling, the instantaneous power required for the current constant temperature of the water heater (that is, the estimated demand power P1) is calculated, and by looking up the preset power adjustment mapping table, the power interval P2 matching the estimated demand power P1 is found, and then the water heater is quickly and roughly adjusted according to the mixing valve adjustment step corresponding to the power interval P2 and the instant heater power. After the adjustment is in place, the difference between the outlet water temperature and the preset constant temperature is continuously monitored. If the constant temperature is not reached, the PID fine adjustment mode is introduced for fine adjustment. Among them, the PID fine adjustment mode gives priority to adjusting the output power of the instant heater. If the constant temperature is still not reached after adjusting the output power of the instant heater, the mixing valve is adjusted for compensation until the outlet water temperature reaches the preset constant temperature, and then the constant temperature stable water outlet operation is carried out.

[0123] Among them, during the user's water use process, the controller always detects changes in the inlet water temperature and water flow rate. If a relatively large change in the inlet water temperature and water flow rate is detected, it will automatically return to the step of estimating the required power P1 and recalculate the adjustment. In this way, dynamic adjustment and adaptive constant temperature can be achieved.

[0124] Corresponding to the above constant temperature control method for a water heater, the present application also provides a constant temperature control device for a water heater. The constant temperature control device for a water heater includes a unit for executing the above constant temperature control method for a water heater, and the constant temperature control device for a water heater can be configured in a desktop computer, a tablet computer, a laptop, or other terminals.

[0125] like Figure 4 As shown, the embodiment of the present application provides a computer device, including a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114.

[0126] Memory 113, used for storing computer programs;

[0127] In one embodiment of the present application, the processor 111 is used to execute the program stored in the memory 113 to implement the constant temperature control method of the water heater provided by any of the above method embodiments, including:

[0128] Get the water inlet temperature, water outlet flow rate and preset constant temperature of the water heater;

[0129] Obtaining an estimated required power based on the water inlet temperature, the water outlet flow rate, and the preset constant temperature;

[0130] Searching for a target adjustment result corresponding to the estimated required power from a preset power adjustment mapping table;

[0131] The temperature of the water heater is adjusted based on the target adjustment result.

[0132] It is understood by those skilled in the art that all or part of the processes in the method for implementing the above embodiment can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a storage medium, which is a computer-readable storage medium. The computer program is executed by at least one processor in the computer system to implement the process steps of the embodiment of the above method.

[0133] Therefore, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the constant temperature control method for a water heater provided in any of the above method embodiments are implemented, including:

[0134] Get the water inlet temperature, water outlet flow rate and preset constant temperature of the water heater;

[0135] Obtaining an estimated required power based on the water inlet temperature, the water outlet flow rate, and the preset constant temperature;

[0136] Searching for a target adjustment result corresponding to the estimated required power from a preset power adjustment mapping table;

[0137] The temperature of the water heater is adjusted based on the target adjustment result.

[0138] The storage medium is a physical, non-transient storage medium, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, or an optical disk, etc., which can store program codes. The computer-readable storage medium can be non-volatile or volatile.

[0139] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0140] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of each unit is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0141] The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs. The units in the device of the embodiment of the present application can be combined, divided and deleted according to actual needs. In addition, the functional units in the various embodiments of the present application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0142] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, terminal, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.

[0143] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0144] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0145] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A constant temperature control method for a water heater, characterized in that: The method comprises: Get the water inlet temperature, water outlet flow rate and preset constant temperature of the water heater; Obtaining an estimated required power based on the water inlet temperature, the water outlet flow rate, and the preset constant temperature; Searching for a target adjustment result corresponding to the estimated required power from a preset power adjustment mapping table; The temperature of the water heater is adjusted based on the target adjustment result.

2. The method according to claim 1, characterized in that After the water heater is thermostatically controlled based on the target adjustment result, the method further includes: Obtain the adjusted outlet water temperature; Determining whether the adjusted water outlet temperature is equal to a preset constant temperature; If the adjusted water outlet temperature is not equal to the preset constant temperature, the water heater is fine-tuned.

3. The method according to claim 2, characterized in that The water heater is provided with an instant heater, and the fine adjustment of the water heater comprises: Adjusting the output power of the instant heater and obtaining a first adjusted water outlet temperature obtained after the adjustment; Determining whether the first adjusted water outlet temperature is equal to the preset constant temperature; If the first adjusted water outlet temperature is equal to the preset constant temperature, the water heater is controlled to operate at a constant temperature based on the first adjusted water outlet temperature.

4. The method according to claim 3, characterized in that The water heater is provided with a water mixing valve, and the water mixing valve is provided at the water outlet of the water heater. The determining whether the first adjusted water outlet temperature is equal to the preset constant temperature further includes: If the first adjusted water outlet temperature is not equal to the preset constant temperature, the water mixing valve is adjusted to perform temperature compensation until the compensated first adjusted water outlet temperature is equal to the preset constant temperature.

5. The method according to claim 1, characterized in that After adjusting the temperature of the water heater based on the target adjustment result, the method further includes: Obtain the change in inlet water temperature after adjustment; Determining whether the adjusted water inlet temperature change is greater than or equal to a preset temperature value; If the adjusted change in the inlet water temperature is greater than or equal to the preset temperature value, the process returns to the step of obtaining the estimated required power based on the inlet water temperature, the outlet water flow rate and the preset constant temperature.

6. The method according to claim 5, characterized in that The step of determining whether the adjusted water inlet temperature change is greater than or equal to a preset temperature value further includes: If the adjusted water inlet temperature change is less than the preset temperature value, obtaining the adjusted water flow change; Determining whether the adjusted water flow change is greater than or equal to a preset water flow rate; If the adjusted water flow change is greater than or equal to the preset water flow rate, the process returns to the step of obtaining the estimated required power based on the water inlet temperature, the water outlet flow rate and the preset constant temperature.

7. The method according to claim 1, characterized in that The preset power adjustment mapping table includes the instantaneous heating heater power and the mixing valve adjustment step corresponding to each preset power interval; the target adjustment result includes the target power of the instantaneous heating heater and the target adjustment step of the mixing valve; The step of adjusting the temperature of the water heater based on the target adjustment result includes: The temperature of the water heater is adjusted according to the target power of the instantaneous heater and the target adjustment step of the water mixing valve.

8. A constant temperature control device for a water heater, characterized in that: The method comprises a unit for executing the method according to any one of claims 1 to 7.

9. A computer device, characterized in that: The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 can be implemented.

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