Constant temperature control method and control system of water heater

Abstract

This application relates to the technical field of water heaters, and provides a constant temperature control method and control system for a water heater. A heating element is provided at the water inlet pipe of the water heater. The method includes: when the water heater is in the water-off state, obtaining the inlet water temperature of the water inlet pipe; determining whether the inlet water temperature meets the heating trigger condition; if the inlet water temperature meets the heating trigger condition, starting the heating element to heat the water inlet pipe. The constant temperature control method for the water heater provided by this application can pre-heat the cold water in the water inlet pipe in advance when the water heater is in the water-off state, and improve the water outlet temperature of the water inlet pipe. In this way, when the user re-opens the faucet, it is ensured that the flowing water has been fully heated, thereby avoiding the temperature drop when the water heater is turned off and then turned on again, and improving the bathing comfort of the user.

Description

Technical Field

[0001] This application relates to the field of water heaters, and particularly to a constant temperature control method and control system for a water heater. Background Art

[0002] When the water heater is turned off and then turned on again, there is generally a problem of temperature drop, which affects the user's bathing experience.

[0003] In order to solve the problem of temperature drop when the water is turned off and then turned on again, most of the water heaters on the market currently adopt the solution of accelerating the ignition speed. By optimizing the ignition control system, the time from detecting the change in water volume to ignition and combustion is shortened, thereby reducing the flow rate of unheated cold water.

[0004] However, this method can only reduce the flow rate of cold water to a certain extent and cannot fundamentally increase the temperature of the cold water. Users will still feel an obvious temperature difference. That is, although accelerating the ignition speed can alleviate the temperature drop to a certain extent, it fails to fundamentally solve the problem. Summary of the Invention

[0005] Embodiments of this application provide a constant temperature control method and control system for a water heater, aiming to solve the problem that the traditional solution of accelerating the ignition speed can only reduce the flow rate of cold water to a certain extent and cannot fundamentally increase the temperature of the cold water.

[0006] In a first aspect, embodiments of this application provide a constant temperature control method for a water heater. A heating element is provided at the inlet pipe of the water heater. The method includes:

[0007] When the water heater is in a water-off state, obtain the inlet water temperature of the inlet pipe;

[0008] Determine whether the inlet water temperature meets the heating trigger condition;

[0009] If the inlet water temperature meets the heating trigger condition, start the heating element to heat the inlet pipe.

[0010] In some embodiments, if the inlet water temperature meets the heating trigger condition, starting the heating element to heat the inlet pipe includes:

[0011] If the inlet water temperature meets the heating trigger condition, determine whether the inlet water temperature meets the first heating condition;

[0012] If the inlet water temperature meets the first heating condition, start one of the heating elements to heat the inlet pipe.

[0013] In some embodiments, determining whether the inlet water temperature meets the first heating condition further includes:

[0014] If the inlet water temperature does not meet the first heating condition, at least two of the heating elements are activated to heat the inlet pipe.

[0015] In some embodiments, determining whether the inlet water temperature meets the heating trigger condition includes:

[0016] Determining whether the inlet water temperature is less than a first preset temperature value;

[0017] If the inlet water temperature is less than the first preset temperature value, it is determined that the inlet water temperature meets the heating trigger condition.

[0018] In some embodiments, determining whether the inlet water temperature meets the first heating condition includes:

[0019] Determining whether the inlet water temperature is greater than a second preset temperature value;

[0020] If the inlet water temperature is greater than the second preset temperature value, it is determined that the inlet water temperature meets the first heating condition.

[0021] In some embodiments, determining whether the inlet water temperature is greater than the second preset temperature value further includes:

[0022] If the inlet water temperature is not greater than the second preset temperature value, it is determined that the inlet water temperature does not meet the first heating condition.

[0023] In some embodiments, when determining whether the inlet water temperature meets the heating trigger condition, the method further includes:

[0024] If the inlet water temperature does not meet the heating trigger condition, the heating element is not activated to heat the inlet pipe.

[0025] In some embodiments, after activating the heating element to heat the inlet pipe, the method further includes:

[0026] When the water in the water heater is turned off and then turned on again, the water-off time of the water heater is obtained;

[0027] Determining whether the water-off time of the water heater is greater than a preset water-off threshold;

[0028] If the water-off time of the water heater is not greater than the preset water-off threshold, when a water flow signal is detected, the heating element is controlled to stop heating.

[0029] In some embodiments, when determining whether the water-off time of the water heater is greater than the preset water-off threshold, the method further includes:

[0030] If the water-off time of the water heater is greater than the preset water-off threshold, the heating element is controlled to stop heating within a preset time period.

[0031] In a second aspect, an embodiment of the present application further provides a constant temperature control system for a water heater. The constant temperature control system for the water heater includes a main controller and the water heater. The water heater includes a water tank, a heating element, a temperature sensor, and a flow sensor. The heating element, the temperature sensor, and the flow sensor are all disposed at the water inlet of the water heater. The main controller is disposed on the water heater and is electrically connected to the heating element. The main controller is configured to execute the steps of the method as described above.

[0032] An embodiment of the present application provides a constant temperature control method and a control system for a water heater. Wherein, the method includes: when the water heater is in a water-off state, obtaining the inlet water temperature of the water inlet pipe; determining whether the inlet water temperature satisfies a heating trigger condition; if the inlet water temperature satisfies the heating trigger condition, starting the heating element to heat the water inlet pipe.

[0033] In the embodiment of the present application, since a heating element is disposed at the water inlet pipe of the water heater, therefore, when the water heater is in a water-off state, if it is determined that the inlet water temperature of the water inlet pipe satisfies the heating trigger condition, the heating element is directly started to heat the water inlet pipe, that is, the cold water in the water inlet pipe is preheated in advance to increase the water outlet temperature of the water inlet pipe. In this way, when the user re-opens the faucet, it is ensured that the flowing water has been fully heated, thereby avoiding the temperature drop generated when the water heater is turned off and then turned on again, improving the user's bathing comfort, and improving the problem that the traditional scheme of accelerating the ignition speed can only reduce the flowing amount of cold water to a certain extent and cannot fundamentally increase the temperature of the cold water. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application and, together with the specification, are used to explain the principles of the present application.

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] One or more embodiments are illustrated by way of example in the accompanying drawings corresponding thereto. These exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the figures do not constitute a proportional limitation.

[0037] Figure 1 FIG. is a schematic structural diagram of a constant temperature control system for a water heater provided by an embodiment of the present application.

[0038] Figure 2 It is a schematic flowchart of a constant temperature control method for a water heater provided by an embodiment of the present application.

[0039] Figure 3 It is another schematic flowchart of a constant temperature control method for a water heater provided by an embodiment of the present application.

[0040] Figure 4 It is a schematic structural diagram of a computer device provided by an embodiment of the present application.

[0041] Explanation of the reference numerals in the drawings:

[0042] Water tank 1, main controller 2, heating element 3, temperature sensor 4, water flow sensor 5. Specific embodiments

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0044] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0045] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0046] It should also be understood that the terms used in this specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this specification of the present application and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0047] It should also be further understood that the term "and / or" as used in the specification and appended claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0048] As used in this specification and the appended claims, the term "if" can be construed, depending on the context, as "when...", "once", "in response to determining", or "in response to detecting". Similarly, the phrase "if determined" or "if [the described condition or event] is detected" can be construed, depending on the context, to mean "once determined", "in response to determining", "once [the described condition or event] is detected", or "in response to detecting [the described condition or event]".

[0049] In a traditional water heater, if the user turns off the faucet during a bath and then turns it on again, since the main controller needs to detect the change in water volume and control ignition and combustion, there is a certain delay in this process. Therefore, when the faucet is turned on again, there will be a period of cold water that has not had time to be heated flowing through the water heater, resulting in a sudden drop in water temperature and affecting the user's bathing experience. This temperature fluctuation not only reduces the user's comfort but may also cause unnecessary energy waste, especially in the case of frequent water on and off.

[0050] To solve the problem of temperature drop when turning off and then turning on the water, most of the water heaters on the market currently adopt the solutions of accelerating the ignition speed or using a segmented water valve.

[0051] The way to accelerate the ignition speed is to optimize the ignition control system to shorten the time from detecting the change in water volume to ignition and combustion, thereby reducing the flow rate of unheated cold water. However, this method can only reduce the flow rate of cold water to a certain extent and cannot fundamentally increase the temperature of the cold water. Users will still feel an obvious temperature difference. In addition, accelerating the ignition speed may increase the complexity and maintenance cost of the system and cannot completely eliminate the temperature drop phenomenon.

[0052] The way of the segmented water valve is to first use a small water volume and then a large water volume after turning off and then turning on the water, so that the temperature rises rapidly. Specifically, when the user turns off and then turns on the water, the system will first supply water with a small water volume to ensure that the water temperature can rise rapidly, and then gradually switch to a large water volume to meet the user's water demand. Among them, in order to prevent temperature overshoot, a bypass pipeline also needs to be added to regulate the water temperature and flow rate. Although this solution can improve the temperature drop problem to a certain extent, this method requires a segmented water valve and a bypass pipe added to the water tank, which requires more costs.

[0053] To solve the above technical problems in the prior art, the present application provides a constant temperature control method and control system for a water heater, which can solve the problem of temperature drop when the water heater turns off and then turns on the water.

[0054] Refer to Figure 1 Figure 1 , this application provides a constant temperature control system for a water heater. The constant temperature control system of the water heater includes a main controller 2 and a water heater. The water heater includes a water tank 1, a heating element 3, a temperature sensor 4, and a flow sensor. The heating element 3, the temperature sensor 4, and the flow sensor are all arranged at the water inlet of the water heater. The main controller 2 is arranged on the water heater and is electrically connected to the heating element 3. The main controller 2 is used to execute the steps of the method described in the following embodiments.

[0055] Among them, the heating element 3 is connected to the main controller 2 and is controlled independently by the main controller 2.

[0056] In some embodiments, the heating element 3 can be an anti-freezing heating element 3. Moreover, the number and power of the heating elements 3 can be reasonably configured according to the diameter of the water pipe of the water tank 1.

[0057] Refer to Figure 2 , Figure 2 Figure 2 is a schematic flow chart of the first embodiment of a constant temperature control method for a water heater provided by this application. The method includes:

[0058] Step 110: When the water heater is in the water-off state, obtain the inlet water temperature of the water inlet pipe.

[0059] Step 120: Determine whether the inlet water temperature meets the heating trigger condition.

[0060] Step 130: If the inlet water temperature meets the heating trigger condition, start the heating element to heat the water inlet pipe.

[0061] In this embodiment, since a heating element is provided at the water inlet pipe of the water heater, therefore, when the water heater is in the water-off state, if it is determined that the inlet water temperature of the water inlet pipe meets the heating trigger condition, the heating element is directly started to heat the water inlet pipe, that is, the cold water in the water inlet pipe is pre-heated in advance. In this way, when the user re-opens the faucet, it is ensured that the water flowing out has been fully heated, thereby avoiding the temperature drop when the water heater is turned off and then turned on again, improving the user's bathing comfort, and improving the problem that the traditional scheme of accelerating the ignition speed can only reduce the flow rate of cold water to a certain extent and cannot fundamentally increase the temperature of cold water.

[0062] In addition, since the heating element is basically a standard configuration of the water heater, therefore, using the heating element to heat the water inlet pipe does not require additional cost.

[0063] In some embodiments, step 120, that is, determining whether the inlet water temperature meets the heating trigger condition, includes:

[0064] Step 121: Determine whether the inlet water temperature is less than the first preset temperature value.

[0065] Among them, the inlet water temperature can be detected and obtained by a temperature sensor at the water inlet pipe.

[0066] Step 122: If the inlet water temperature is less than the first preset temperature value, it is determined that the inlet water temperature meets the heating trigger condition.

[0067] In some embodiments, if the inlet water temperature does not meet the heating trigger condition, the heating element is not activated to heat the water inlet pipe.

[0068] For example, if the inlet water temperature is greater than the first preset temperature value, it is determined that the inlet water temperature does not meet the heating trigger condition, and the heating element is not activated to heat the water inlet pipe.

[0069] In some embodiments, the first preset temperature value can be 28 - 32 °C.

[0070] That is, when the inlet water temperature is lower than 28 - 32 °C, it means that the heating element needs to be activated for heating. When the inlet water temperature is higher than 28 - 32 °C, it means that the water temperature when the water heater is turned on again after being turned off will not be too low. To avoid too high water temperature and save electricity, the heating element is no longer turned on for heating.

[0071] That is, when the water heater is in the closed - water state, if the detected inlet water temperature does not meet the heating trigger condition, the heating element is not activated to heat the water inlet pipe. In this way, the heating cost can be reduced, and at the same time, the problem that the water temperature provided to the user is too hot, resulting in a poor user experience, can be avoided.

[0072] In some embodiments, the number of heating elements can be multiple. Referring to the second embodiment of a constant - temperature control method for a water heater provided in this application, the method includes:

[0073] Step 210: When the water heater is in the closed - water state, obtain the inlet water temperature of the water inlet pipe.

[0074] Step 220: Determine whether the inlet water temperature meets the heating trigger condition.

[0075] Step 230: If the inlet water temperature meets the heating trigger condition, determine whether the inlet water temperature meets the first heating condition.

[0076] Step 240: If the inlet water temperature meets the first heating condition, activate one of the heating elements to heat the water inlet pipe.

[0077] Referring to the third embodiment of a constant - temperature control method for a water heater provided in this application, the method includes:

[0078] Step 310: When the water heater is in the water-off state, obtain the inlet water temperature of the water inlet pipe.

[0079] Step 320: Determine whether the inlet water temperature meets the heating trigger condition.

[0080] Step 330: If the inlet water temperature meets the heating trigger condition, then determine whether the inlet water temperature meets the first heating condition.

[0081] Step 340: If the inlet water temperature meets the first heating condition, start one of the heating elements to heat the water inlet pipe.

[0082] Step 350: If the inlet water temperature does not meet the first heating condition, start at least two of the heating elements to heat the water inlet pipe.

[0083] Since the number of heating elements is multiple, therefore, after it is determined that the heating trigger condition is met, it can be further determined whether the inlet water temperature meets the first heating condition, so as to control the number of started heating elements according to the temperature, and then heating can be carried out reasonably and electricity can be saved.

[0084] In some embodiments, determining whether the inlet water temperature meets the first heating condition in step 230 includes:

[0085] Step 231: Determine whether the inlet water temperature is greater than a second preset temperature value.

[0086] Step 232: If the inlet water temperature is greater than the second preset temperature value, determine that the inlet water temperature meets the first heating condition.

[0087] Step 233: If the inlet water temperature is not greater than the second preset temperature value, determine that the inlet water temperature does not meet the first heating condition.

[0088] In some embodiments, the second preset temperature value can be 5 - 10 °C. When the inlet water temperature is higher than 5 - 10 °C and lower than 28 - 32 °C, it means that the temperature is moderate at this time, and 1 heating element can be started to heat the water inlet pipe.

[0089] When the inlet water temperature is lower than 5 - 10 °C, it means that the temperature is low. At this time, if the water is turned off and then the temperature is restarted, the temperature drop will be obvious. Therefore, more than 2 heating elements need to be started to quickly heat the water inlet pipe.

[0090] Referring to the fourth embodiment of a constant temperature control method for a water heater provided in the present application, the method includes:

[0091] Step 410: When the water heater is in the water-off state, obtain the inlet water temperature of the water inlet pipe.

[0092] Step 420: Determine whether the inlet water temperature meets the heating trigger condition.

[0093] Step 430: If the inlet water temperature meets the heating trigger condition, start the heating element to heat the inlet pipe.

[0094] Step 440: When the water is turned on again after the water heater is turned off, obtain the water-off time of the water heater.

[0095] Step 450: Determine whether the water-off time of the water heater is greater than a preset water-off threshold.

[0096] Step 460: If the water-off time of the water heater is not greater than the preset water-off threshold, control the heating element to stop heating when a water flow signal is detected.

[0097] In some embodiments, when determining whether the water-off time of the water heater is greater than a preset water-off threshold, the method further includes:

[0098] Step 470: If the water-off time of the water heater is greater than the preset water-off threshold, control the heating element to stop heating within a preset time period.

[0099] Wherein, the preset water-off threshold refers to the intermediate interval time between turning off the water and turning it on again, which can be 60s - 90s, and the preset time period can also be 60s - 90s. The intermediate interval time is mainly the time for users to operate to apply shampoo, facial cleanser, body wash, etc.

[0100] Assuming 60s as the dividing line, in actual use, if the user's water-off interval time is less than 60s, when the water heater turns on the water, directly control the heating element to stop working.

[0101] If the water-off time is greater than 60s, the user may have completed bathing. To avoid wasting electricity, control the heating element to turn off after heating for 60s - 90s.

[0102] In this way, when the water heater turns off the water, control the heating element to heat the inlet pipe according to the inlet water temperature. When the water heater turns on the water again, then control the heating element to stop working according to the water-off time. This can ensure that during the water-off period, the heating element can pre-heat the cold water at the inlet pipe, improve the water outlet temperature of the inlet pipe, avoid having a section of cold water with a lower temperature when turning off and then on the water, and improve the user's bathing experience.

[0103] Based on the above embodiments, referring to Figure 3 , the constant temperature control method of the water heater provided by the present application mainly includes the following processes:

[0104] Step 11: The water heater works normally.

[0105] Step 12: The anti-freezing heating element does not work.

[0106] Step 13: The water supply of the water heater is turned off.

[0107] Step 14: The main controller monitors the temperature T of the water inlet probe.

[0108] Wherein, the water inlet probe is a temperature sensor.

[0109] Step 15: When the inlet water temperature is higher than TI, the anti-freezing heating element is not started to heat the water inlet pipe.

[0110] Step 16: When the current inlet water temperature is higher than T2 and lower than TI, the main controller starts 1 anti-freezing heating element to heat the water inlet pipe.

[0111] Step 17: When the current inlet water temperature is lower than T2, the main controller starts more than 2 anti-freezing heating elements to heat the water inlet pipe.

[0112] Wherein, TI is the first preset temperature value, T2 is the second preset temperature value, TI can be 28 - 32 °C, and T2 can be 5 - 10 °C.

[0113] Step 18: The water supply of the water heater is turned off and then turned on again.

[0114] Step 19: The main controller records the water cut-off time P.

[0115] If the water cut-off time is below P1, step 20 is executed; if the water cut-off time is above P1, step 21 is executed.

[0116] Wherein, P1 is the preset water cut-off threshold, which can be 60s - 90s.

[0117] Step 20: After the water supply of the water heater is turned on again, when the main controller detects a water flow signal, it controls the anti-freezing heating element to stop heating.

[0118] Step 21: The main controller controls the anti-freezing heating element to heat and stops heating after a specific time.

[0119] Wherein, the specific time is the preset time period, which can be 60s - 90s.

[0120] That is, when the water supply of the water heater is turned off, the main controller will first detect the inlet water temperature. If the current inlet water temperature is higher than T1, in order to avoid too high outlet water temperature, the main controller does not start the anti-freezing heating element to heat the water inlet pipe.

[0121] When the current inlet water temperature is lower than T1, it indicates that the anti-freezing heating element needs to be started to heat the inlet pipe. Since there are multiple anti-freezing heating elements, the relationship between the current inlet water temperature and T2 can be further determined. When the inlet water temperature is lower than T1 and higher than T2, 1 anti-freezing heating element is controlled to heat the inlet pipe; when the inlet water temperature is lower than T2, 2 or more anti-freezing heating elements are controlled to heat the inlet pipe. That is, by controlling the number of anti-freezing heating elements according to the temperature, the inlet pipe can be heated reasonably and electricity can be saved.

[0122] In addition, when the water supply of the water heater is turned off, the main controller will record the water supply off duration. If the water supply off duration does not exceed P1, when the water supply is turned on again and the main controller detects the water volume signal transmitted by the water flow sensor, it will control the anti-freezing heating element to stop working. If the water supply off duration exceeds P1, the main controller will control the anti-freezing heating element to turn off at a specific time.

[0123] In this way, when the water supply of the water heater is turned off and then on again, since the anti-freezing heating element can preheat the inlet pipe, the excessive decrease in water temperature when the water supply is turned on again can be avoided, improving the user's bathing experience.

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

[0125] As Figure 4 shown, an 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. Among them, the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114.

[0126] The memory 113 is used to store a computer program.

[0127] In an embodiment of the present application, when the processor 111 executes the program stored on the memory 113, it implements the constant temperature control method of the water heater provided by any one of the foregoing method embodiments, including:

[0128] When the water heater is in the water supply off state, obtain the inlet water temperature of the inlet pipe;

[0129] Judge whether the inlet water temperature meets the heating trigger condition;

[0130] If the inlet water temperature meets the heating trigger condition, start the heating element to heat the inlet pipe.

[0131] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a storage medium, and the storage medium 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 above method embodiments.

[0132] Therefore, the embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the constant temperature control method of the water heater provided in any of the foregoing method embodiments, including:

[0133] When the water heater is in the water-off state, obtain the inlet water temperature of the water inlet pipe;

[0134] Judge whether the inlet water temperature meets the heating trigger condition;

[0135] If the inlet water temperature meets the heating trigger condition, start the heating element to heat the water inlet pipe.

[0136] The storage medium is a physical, non-transitory storage medium, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, or an optical disc, etc., which are various physical storage media that can store program codes. The computer-readable storage medium can be non-volatile or volatile.

[0137] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0138] In 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 merely illustrative. 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.

[0139] The steps in the method of the embodiments of the present application can be adjusted in sequence, combined, and deleted according to actual needs. The units in the device of the embodiments of the present application can be combined, divided, and deleted according to actual needs. In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, can exist physically alone for each unit, or two or more units can be integrated in one unit.

[0140] 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 such an understanding, the technical solution of the present application, in essence, 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. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application.

[0141] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0142] 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, provided that these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

[0143] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A constant temperature control method for a water heater, characterized in that, A heating element is provided at the water inlet pipe of the water heater, and the method includes: When the water heater is in the water-off state, obtain the inlet water temperature of the water inlet pipe; Judge whether the inlet water temperature meets the heating trigger condition; If the inlet water temperature meets the heating trigger condition, start the heating element to heat the water inlet pipe; Among them, if the inlet water temperature meets the heating trigger condition, starting the heating element to heat the water inlet pipe includes: If the inlet water temperature meets the heating trigger condition, judge whether the inlet water temperature meets the first heating condition; If the inlet water temperature meets the first heating condition, start one of the heating elements to heat the water inlet pipe; If the inlet water temperature does not meet the first heating condition, start at least two of the heating elements to heat the water inlet pipe; Among them, judging whether the inlet water temperature meets the heating trigger condition includes: Judge whether the inlet water temperature is less than the first preset temperature value; If the inlet water temperature is less than the first preset temperature value, it is determined that the inlet water temperature meets the heating trigger condition; Among them, judging whether the inlet water temperature meets the first heating condition includes: Judge whether the inlet water temperature is greater than the second preset temperature value; If the inlet water temperature is greater than the second preset temperature value, it is determined that the inlet water temperature meets the first heating condition; Among them, judging whether the inlet water temperature is greater than the second preset temperature value further includes: If the inlet water temperature is not greater than the second preset temperature value, it is determined that the inlet water temperature does not meet the first heating condition; Among them, judging whether the inlet water temperature meets the heating trigger condition, the method further includes: If the inlet water temperature does not meet the heating trigger condition, do not start the heating element to heat the water inlet pipe; Among them, after starting the heating element to heat the water inlet pipe, the method further includes: When the water is turned on again after the water heater is turned off, obtain the water-off time of the water heater; Judge whether the water-off time of the water heater is greater than the preset water-off threshold; If the water-off time of the water heater is not greater than the preset water-off threshold, when a water flow signal is detected, control the heating element to stop heating; Among them, judging whether the water-off time of the water heater is greater than the preset water-off threshold, the method further includes: If the water-off time of the water heater is greater than the preset water-off threshold, control the heating element to stop heating within a preset time period.

2. A constant temperature control system for a water heater, characterized in that, The constant temperature control system of the water heater includes a main controller and a water heater. The water heater includes a water tank, a heating element, a temperature sensor, and a flow sensor. The heating element, the temperature sensor, and the flow sensor are all arranged at the water inlet of the water heater. The main controller is arranged on the water heater and is electrically connected to the heating element. The main controller is used to execute the steps of the method as described in claim 1.

Images