Water heater-based constant water volume control method, water heater and storage medium

Abstract

The application relates to a constant water quantity control method based on a water heater, the water heater and a storage medium. The method comprises the following steps: judging whether the current mode of the water heater is a zero cold water mode or a constant water quantity mode; if the current mode is the zero cold water mode, controlling the rotating speed of a water pump of the water heater according to the pipeline circulation flow corresponding to the water heater, so that the water outlet quantity of a water use point associated with the water heater is constant; and if the current mode is the constant water quantity mode, controlling the rotating speed of the water pump according to the flow variation of a water outlet pipe of the water heater before and after the water pump is operated, so that the water outlet quantity of the water use point associated with the water heater is constant. The application can realize the best balance between preheating waiting time and operation noise and constant water quantity during multi-point water use, thereby improving the user experience.

Description

Technical Field

[0001] This application relates to the field of water heater technology, and in particular to a constant water volume control method based on a water heater, a water heater and a storage medium. Background Technology

[0002] Currently, to address the issue of low water pressure causing the machine to fail to start or resulting in insufficient water flow when using gas water heaters, a booster pump can be added inside the gas water heater. This booster function, with its fixed settings, increases the inlet water pressure, thereby increasing the overall water flow. However, this fixed-level booster function may suffer from insufficient pressure, leading to prolonged preheating times, or excessive pressure, resulting in loud pump noise. Furthermore, if other water outlets also require hot water simultaneously, the water flow to those outlets may suddenly decrease due to limited overall water pressure, causing fluctuations in the water heater's outlet temperature and resulting in inconsistent hot water temperatures, leading to a poor user experience.

[0003] Therefore, providing an adaptive control method for water pump speed to achieve the best balance between preheating waiting time and operating noise, as well as constant water volume when multiple points use water, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of the above, this application provides a constant water volume control method, a water heater and a storage medium based on a water heater, the purpose of which is to solve the above-mentioned technical problems.

[0005] In a first aspect, this application provides a constant water volume control method based on a water heater, the method comprising:

[0006] Determine whether the water heater is currently in zero cold water mode or constant water flow mode;

[0007] If the current mode is zero cold water mode, the speed of the water pump of the water heater is controlled according to the circulation flow of the pipe corresponding to the water heater, so as to keep the water output of the water point associated with the water heater constant.

[0008] If the current mode is constant water flow mode, the speed of the water pump is controlled according to the change in the flow rate of the water outlet pipe of the water heater before and after the water pump runs, so as to keep the water output of the water heater associated with the water outlet constant.

[0009] Secondly, this application provides a water heater, which further includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0010] Memory, used to store programs;

[0011] When the processor executes a program stored in the memory, it implements the constant water volume control method based on a water heater as described in any embodiment of the first aspect.

[0012] Thirdly, a computer-readable storage medium is provided having a program stored thereon, which, when executed by a processor, implements the constant water volume control method based on a water heater as described in any embodiment of the first aspect.

[0013] The technical solutions provided in this application have the following advantages compared with the prior art:

[0014] This application determines whether the water heater is currently in zero-cold-water mode or constant-flow mode. If the current mode is zero-cold-water mode, the water pump speed is controlled based on the corresponding pipe circulation flow rate. Since the pipe circulation flow rate includes both the external and internal water systems of the water heater, the pump operation during preheating causes water flow in both systems. Therefore, by controlling the pump speed based on the pipe circulation flow rate, a suitable speed can be adaptively adjusted within the pump's maximum speed limit, achieving the best balance between preheating waiting time and operating noise. This avoids problems such as insufficient pressure leading to long preheating waiting times or excessive pressure leading to loud pump noise. If the current mode is constant-flow mode, the water pump speed is controlled based on the change in flow rate in the water heater's outlet pipe before and after the pump operation. Since the flow rate change represents the number of water usage points, controlling the pump speed based on this change in flow rate in the outlet pipe ensures a constant water flow at each point of use when multiple points are in use, thereby improving the user experience. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 This is a flowchart illustrating an embodiment of the constant water volume control method for water heaters in this application;

[0019] Figure 2 This is a schematic diagram of the water pump control system of the water heater in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the interface of the wireless control terminal in the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the process of controlling the water pump speed according to the circulation flow rate of the pipe corresponding to the water heater in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the process in this application for controlling the water pump speed based on the change in flow rate of the water outlet pipe of the water pump before and after operation;

[0023] Figure 6 This is a schematic diagram of an embodiment of the water heater of this application;

[0024] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0027] This application provides a constant water flow control method based on a water heater. (Refer to...) Figure 1 The diagram shown is a flowchart illustrating an embodiment of the constant water flow control method based on a water heater according to this application. This method can be executed by an electronic device (e.g., a water heater), which can be implemented using software and / or hardware. The water heater is connected to at least one water usage point via hot water pipes and cold water pipes. The method includes:

[0028] Step S1: Determine whether the water heater is currently in zero cold water mode or constant water flow mode;

[0029] Step S2: If the current mode is the zero - cold - water mode, control the rotation speed of the water pump of the water heater according to the pipeline circulation flow rate corresponding to the water heater, so as to keep the water output of the water - using points associated with the water heater constant.

[0030] Step S3: If the current mode is the constant - water - volume mode, control the rotation speed of the water pump according to the change in the flow rate of the water outlet pipe of the water heater before and after the water pump operates, so as to keep the water output of the water - using points associated with the water heater constant.

[0031] Combined with Figure 2 Referring to the schematic framework diagram of the water pump control system of the water heater shown in [Figure number], the constant - water - volume control method based on the water heater in this embodiment will be described in detail. The devices at the water - using points can be mechanical devices such as shower heads and faucets, and the devices at the water - using points can also be electronic devices such as water purifiers and water dispensers. The water heater is connected to multiple water - using points through hot - water pipes and cold - water pipes. A corresponding wireless control terminal can be installed near each water - using point. The wireless control terminal is communicatively connected to the water heater via WIFI or Bluetooth. Among them, the Bluetooth connection can be a Bluetooth Low Energy (BLE) connection. The BLE connection has the advantage of low power consumption compared to traditional Bluetooth. A probe for measuring the inlet water temperature and a probe for measuring the outlet water temperature are installed in the water heater, which can monitor the temperature values of the inlet water and the outlet water of the water heater. The water pump (for example, a direct - current water pump) installed in the water heater can make the water flow to each water - using point.

[0032] Refer to Figure 3 As shown in [Figure number], it is a schematic diagram of the wireless control terminal in the embodiment of the present application. The wireless control terminal can be used for the user to select the working mode of the water heater. The wireless control terminal can be a control terminal with physical buttons or virtual buttons. The interface of the wireless control terminal is the same as the display interface of the overall operation of the water heater. The wireless control terminal has a power - on / off button, temperature increase / decrease buttons, and mode - selection buttons (for example, zero - cold - water mode button and constant - water - volume mode button). The user can select the corresponding working mode of the water heater through the wireless control terminal. For example, the user selects the working mode of the water heater through the buttons of the wireless control terminal at the water - using point 3. The user can also select the working mode of the water heater through the buttons of the water heater.

[0033] Specifically, it is determined whether the current mode of the water heater is the zero - cold - water mode or the constant - water - volume mode. The zero - cold - water mode means that the water heater maintains the temperature of the water in the pipeline through a circulation system, enabling the user to obtain hot water immediately when turning on the water - using point. This mode can avoid waiting and wasting cold water. If the current mode is the zero - cold - water mode (i.e., the user selects the zero - cold - water mode), the rotation speed of the water pump of the water heater is controlled according to the corresponding pipeline circulation flow rate of the water heater. Among them, the maximum working voltage at which the water pump can operate normally is denoted as Vmax, and the default working voltage when the water pump starts is denoted as V0. V0 can be set to 0.8 times of Vmax, and no specific limitation is made here. The pipeline circulation flow rate refers to the water flow rate of the water body in the external water circuit system of the water heater and the internal water circuit system of the water heater when the water pump runs during pre - heating. The external water circuit system of the water heater refers to the water circuit system connected to the water outlet pipe of the water heater. By controlling the rotation speed of the water pump according to the pipeline circulation flow rate, the appropriate rotation speed can be adaptively adjusted within the maximum rotation speed limit of the water pump, achieving the best balance effect between the pre - heating waiting time and the running noise, avoiding problems such as insufficient pressure boost resulting in a long pre - heating waiting time or excessive pressure boost resulting in a large noise of the water pump, and at the same time ensuring a constant water output at the current water - using point. The current water - using point refers to the water - using point that the user is currently using.

[0034] As shown Figure 4 in the figure, it is a schematic flowchart of controlling the rotation speed of the water pump according to the corresponding pipeline circulation flow rate of the water heater in the embodiment of the present application, that is, the schematic flowchart of controlling the rotation speed of the water pump in the zero - cold - water mode. Specifically, the controlling the rotation speed of the water pump of the water heater according to the corresponding pipeline circulation flow rate of the water heater includes:

[0035] Step S21: Determine whether the target voltage during the operation of the water pump is recorded;

[0036] Step S22: If so, control the operation of the water pump with the target voltage;

[0037] If not, control the operation of the water pump with the default working voltage and control the rotation speed of the water pump according to the current pipeline circulation flow rate.

[0038] The target voltage refers to the operating voltage of the water pump under ideal conditions. This voltage is the operating voltage of the water pump when it is running to ensure that the pipeline circulation flow is within a preset flow range. The preset flow range can be 4L / min-5L / min, and this range can be reasonably set in practical applications. The water heater pump operates at the default operating voltage upon its first start. During operation, it automatically adjusts the pump's operating voltage based on the actual pipeline circulation flow to adjust the pump speed, thereby controlling the water flow rate of the water heater. If the water heater pump learns and adjusts to the target voltage during operation, it can store the relevant parameters corresponding to the target voltage so that the pump can operate at that target voltage the next time it starts. If the current mode is zero cold water mode, it first checks whether the target voltage for the pump's operation is recorded. If the target voltage is recorded, the pump is controlled by that target voltage. If the target voltage is not recorded, the pump is controlled by the default operating voltage, and the pump speed is controlled according to the current pipeline circulation flow.

[0039] Furthermore, the aforementioned step of "controlling the operation of the water pump with the default operating voltage and controlling the speed of the water pump according to the current pipeline circulation flow" specifically includes:

[0040] Step S23: Control the water pump to run at the default operating voltage and determine whether the current pipeline circulation flow rate is within the preset flow range;

[0041] Step S24: If yes, control the water pump to run using the default operating voltage as the target voltage;

[0042] Step S25: If not, adjust the speed of the water pump according to the current pipeline circulation flow rate until the pipeline circulation flow rate is within the preset flow range.

[0043] The water pump operates at its default working voltage, and the system checks if the current pipeline circulation flow rate is within the preset flow range. If it is, the optimal preheating conditions are met. If not, the pump is not operating at its ideal speed. In this case, the pump speed is adjusted based on the current flow rate until it falls within the preset range. Adjusting the pump speed can be achieved by adjusting the pump's operating voltage.

[0044] Furthermore, the aforementioned step of "adjusting the pump speed according to the current pipeline circulation flow until the pipeline circulation flow is within the preset flow range" specifically includes:

[0045] If the current pipeline circulation flow rate is greater than the maximum value of the preset flow range, reduce the speed of the water pump until the pipeline circulation flow rate is within the preset flow range, and use the voltage when the pipeline circulation flow rate is within the preset flow range as the target voltage to run the water pump.

[0046] If the current pipeline circulation flow is less than the minimum value of the preset flow range, increase the speed of the water pump until the pipeline circulation flow is within the preset flow range, and use the voltage when the pipeline circulation flow is within the preset flow range as the target voltage to run the water pump.

[0047] If the current pipeline circulation flow rate is greater than the maximum value of the preset flow range, for example, greater than 5 L / min, it indicates that the water pump speed is high, resulting in a high pipeline circulation flow rate. A high pump speed may also generate higher operating noise. Therefore, it is necessary to reduce the water pump's operating voltage to reduce its speed until the pipeline circulation flow rate falls within the preset flow range after the voltage reduction. If the pipeline circulation flow rate falls within the preset flow range when the water pump's operating voltage drops to Vn, then Vn will be used as the target voltage, and the water pump will operate at that voltage.

[0048] If the current pipeline circulation flow rate is less than the minimum value of the preset flow range, for example, less than 4 L / min, it indicates that the pump speed is too low, resulting in a low pipeline circulation flow rate. A low pump speed may lead to a longer preheating time. Therefore, it is necessary to increase the pump's operating voltage to increase its speed until the increased pipeline circulation flow rate falls within the preset flow range. If the pipeline circulation flow rate falls within the preset flow range when the pump's operating voltage drops to Vm, then Vm is used as the target voltage, and the pump operates at that voltage. This achieves an optimal balance between preheating time and operating noise, avoiding problems such as insufficient pressure leading to a long preheating time or excessive pressure leading to excessive pump noise.

[0049] Furthermore, after using the voltage at which the pipeline circulation flow rate is within a preset flow range as the target voltage for the water pump, the method further includes:

[0050] Determine whether the water pump meets the conditions for stopping operation;

[0051] If so, control the water pump to stop running.

[0052] The conditions for stopping the water pump can include completing preheating, the user manually shutting off the preheating, or a significant reduction in water consumption. After setting the voltage at which the pipeline circulation flow rate is within a preset flow range as the target voltage for the water pump, it is determined whether the water pump meets the conditions for stopping operation. If it does, the water pump is controlled to stop operation; if the conditions for stopping operation are not met, the water pump continues to operate at the target voltage.

[0053] If it is determined that the current mode is the constant water volume mode (i.e., the user selects the constant water volume mode), the rotation speed of the water pump of the water heater is controlled according to the flow rate change of the water outlet pipe of the water heater before and after the water pump operates. Among them, the maximum working voltage at which the water pump can work normally is denoted as Vmax, and the default working voltage when the water pump starts is denoted as V0, and V0 can be set to 0.8 times of Vmax. By controlling the rotation speed of the water pump according to the flow rate change of the water outlet pipe of the water heater before and after the water pump operates, the appropriate rotation speed can be adaptively adjusted under the maximum rotation speed limit of the water pump to keep the water volume at the current water usage point basically unchanged. Among them, the constant water volume mode means that if a target water usage point (for example, water usage point 1) is opened by the user during normal water usage, and if other water usage points are opened at this time, the water output of water usage point 1 remains unchanged, so as to keep the water output of the current water usage point constant.

[0054] See Figure 5 As shown, it is a schematic flowchart of controlling the rotation speed of the water pump according to the flow rate change of the water outlet pipe of the water heater before and after the water pump operates in an embodiment of the present application, that is, a schematic flowchart of controlling the rotation speed of the water pump in the constant water volume mode. Specifically, controlling the rotation speed of the water pump according to the flow rate change of the water outlet pipe of the water heater before and after the water pump of the water heater operates includes:

[0055] Step S31: Determine whether the target voltage during the operation of the water pump is recorded;

[0056] Step S32: If so, after meeting the preset water pump boost start condition, use a preset multiple of the target voltage as the current operating voltage to control the operation of the water pump, and control the rotation speed of the water pump according to the flow rate change before and after the water pump operates;

[0057] Step S33: If not, after meeting the preset water pump boost start condition, use a preset multiple of the default working voltage as the current operating voltage to control the operation of the water pump, and control the rotation speed of the water pump according to the flow rate change before and after the water pump operates.

[0058] During the operation of the water pump of the water heater, if the target voltage is learned and adjusted, the relevant parameters corresponding to the target voltage can be stored. If the current mode is the constant water volume mode, it can first be determined whether the target voltage during the operation of the water pump is recorded. If the target voltage is recorded, after meeting the preset water pump boost start condition, use a preset multiple (for example, 1.2 times) of the target voltage as the current operating voltage to control the operation of the water pump. It should be noted that the current operating voltage also needs to be less than or equal to the maximum working voltage Vmax, and regularly record the flow rate change before and after the water pump operates, and control the rotation speed of the water pump according to the flow rate change before and after the water pump operates.

[0059] If the target voltage is not recorded, after meeting the preset water pump boosting start conditions, the water pump will be controlled using a preset multiple (e.g., 1.2 times) of the default operating voltage V0. The current operating voltage must be less than or equal to the maximum operating voltage Vmax. The flow rate change before and after the water pump starts will be recorded periodically, and the water pump speed will be controlled based on the flow rate change to maintain a relatively constant water volume at the current water usage point. The preset water pump boosting start conditions can be a water flow rate of 2L / min-8L / min from the water heater outlet pipe. This range can be reasonably set in different application scenarios.

[0060] Furthermore, the step of "controlling the speed of the water pump based on the change in flow rate before and after the water pump starts operating" specifically includes:

[0061] The change in flow rate is calculated at preset time intervals based on the water flow rate of the water heater outlet pipe before the water pump starts running and the water flow rate of the water heater outlet pipe after the water pump starts running.

[0062] If the change in flow rate decreases by more than a first threshold, the water pump is controlled to stop operating.

[0063] If the change in flow rate increases above a second threshold, the pump will be controlled to operate at its maximum operating voltage.

[0064] Record the water flow rate in the water heater outlet pipe before the water pump starts running, and record the water flow rate in the water heater outlet pipe after the water pump starts running at each preset time interval. This allows you to calculate the change in flow rate before and after the water pump starts (denoted as ). △ Q), where the frequency of calculating flow rate changes can be set according to actual needs. If the calculated flow rate change decreases by more than a first threshold (e.g., 80%), it indicates that the water consumption at the water point has decreased, thus meeting the conditions for shutting down the water pump, and therefore the water pump is controlled to stop operating. If the calculated flow rate change increases by more than a second threshold (e.g., 30%), it indicates that a new water point has been opened with a large water demand. In this case, the water pump is controlled to operate according to the maximum operating voltage Vmax of the water pump to meet the current water demand, and the step of "calculating flow rate changes every preset time period" is repeated. If the calculated flow rate change is between the first and second thresholds (i.e., the flow rate change decreases by less than 80% and the flow rate change increases by less than 30%), the water pump is controlled to maintain its current operating state to achieve a constant water volume working mode that keeps the water consumption at the current water point basically unchanged.

[0065] Reference Figure 6 The diagram shown is a schematic representation of a preferred embodiment of the water heater of this application.

[0066] The water heater includes 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.

[0067] Memory 113 is used to store programs, such as the water pump control program for a water heater;

[0068] In some embodiments, the processor 111 may be a central processing unit (CPU), controller, microcontroller, microprocessor, or other data processing chip. The processor 111 is typically used to control the overall operation of the water heater, such as performing data interaction or communication-related control and processing. In this embodiment, the processor 111 is used to run program code stored in the memory 113 or process data, such as running the program code for the water heater's pump control program.

[0069] The communication interface 112 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface). The communication interface 112 can also be used to establish a communication connection between the water heater and other water heaters.

[0070] The memory 113 includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 113 may be an internal storage unit of the water heater, such as the hard disk or memory of the water heater. In other embodiments, the memory 113 may also be an external storage device of the water heater, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. of the water heater. Of course, the memory 113 may include both the internal storage unit and its external storage device of the water heater. In this embodiment, the memory 113 is typically used to store the operating system and various programs installed on the water heater, such as the program code of the water pump control program of the water heater. In addition, the memory 113 can also be used to temporarily store various types of data that have been output or will be output.

[0071] Figure 6Only water heaters with components 111-114 are shown; however, it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0072] In one embodiment of this application, the processor 111, when executing the program stored in the memory 113, implements the constant water volume control method based on a water heater provided in any of the foregoing method embodiments, including:

[0073] Determine whether the water heater is currently in zero cold water mode or constant water flow mode;

[0074] If the current mode is zero cold water mode, the speed of the water pump of the water heater is controlled according to the circulation flow of the pipe corresponding to the water heater, so as to keep the water output of the water point associated with the water heater constant.

[0075] If the current mode is constant water flow mode, the speed of the water pump is controlled according to the change in the flow rate of the water outlet pipe of the water heater before and after the water pump runs, so as to keep the water output of the water heater associated with the water outlet constant.

[0076] For a detailed explanation of the above steps, please refer to the above. Figure 1 A flowchart illustrating an embodiment of a constant water volume control method based on a water heater.

[0077] Furthermore, this application also proposes a computer-readable storage medium, which can be non-volatile or volatile. The computer-readable storage medium includes a data storage area and a program storage area. The program storage area stores a water pump control program for a water heater. When executed by a processor, the water pump control program performs the following operations:

[0078] Determine whether the water heater is currently in zero cold water mode or constant water flow mode;

[0079] If the current mode is zero cold water mode, the speed of the water pump of the water heater is controlled according to the circulation flow of the pipe corresponding to the water heater, so as to keep the water output of the water point associated with the water heater constant.

[0080] If the current mode is constant water flow mode, the speed of the water pump is controlled according to the change in the flow rate of the water outlet pipe of the water heater before and after the water pump runs, so as to keep the water output of the water heater associated with the water outlet constant.

[0081] The specific implementation of the computer-readable storage medium in this application is largely the same as the specific implementation of the constant water volume control method based on the water heater described above, and will not be repeated here.

[0082] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0083] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0084] It should be noted that the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0085] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0086] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A constant water volume control method based on a water heater, characterized in that, The method includes: Determine whether the water heater is currently in zero cold water mode or constant water flow mode; If the current mode is zero cold water mode, the speed of the water pump of the water heater is controlled according to the circulation flow of the pipe corresponding to the water heater, so as to keep the water output of the water point associated with the water heater constant. If the current mode is constant water volume mode, the speed of the water pump is controlled according to the change in the flow rate of the water outlet pipe of the water heater before and after the water pump runs, so as to keep the water output of the water heater associated with the water outlet constant. The method of controlling the speed of the water pump based on the change in flow rate of the water outlet pipe of the water heater before and after the water pump starts running includes: Determine whether the target voltage for the water pump is recorded. The target voltage refers to the operating voltage of the water pump when it is running and the pipeline circulation flow is within a preset flow range. If so, after the preset water pump boosting start conditions are met, the water pump is controlled to run using a preset multiple of the target voltage as the current operating voltage, and the water pump speed is controlled according to the change in flow rate before and after the water pump runs. If not, after the preset water pump boosting start conditions are met, the water pump is controlled to run at a preset multiple of the default operating voltage, and the water pump speed is controlled according to the change in flow rate before and after the water pump runs. The step of controlling the pump speed based on the change in flow rate before and after the pump starts operating includes: The change in flow rate is calculated at preset time intervals based on the water flow rate of the water heater outlet pipe before the water pump starts running and the water flow rate of the water heater outlet pipe after the water pump starts running. If the change in flow rate decreases by more than a first threshold, the water pump is controlled to stop operating. If the change in flow rate increases above a second threshold, the pump will be controlled to operate at its maximum operating voltage.

2. The constant water volume control method based on a water heater as described in claim 1, characterized in that, The method of controlling the speed of the water pump of the water heater according to the circulation flow rate of the pipe corresponding to the water heater includes: Determine whether the target voltage during water pump operation is recorded; If so, the water pump is controlled to operate using the target voltage; If not, the water pump is controlled to operate at the default operating voltage, and the pump speed is controlled according to the current pipeline circulation flow rate.

3. The constant water volume control method based on a water heater as described in claim 2, characterized in that, The method of controlling the water pump operation with a default operating voltage and controlling the water pump speed according to the current pipeline circulation flow includes: The water pump is controlled to operate at the default operating voltage, and it is determined whether the current pipeline circulation flow rate is within the preset flow range. If so, the default operating voltage is used as the target voltage to control the operation of the water pump; If not, adjust the pump speed according to the current pipeline circulation flow rate until the pipeline circulation flow rate is within the preset flow range.

4. The constant water volume control method based on a water heater as described in claim 3, characterized in that, The step of adjusting the pump speed according to the current pipeline circulation flow rate until the pipeline circulation flow rate is within a preset flow range includes: If the current pipeline circulation flow rate is greater than the maximum value of the preset flow range, reduce the speed of the water pump until the pipeline circulation flow rate is within the preset flow range, and use the voltage when the pipeline circulation flow rate is within the preset flow range as the target voltage to run the water pump. If the current pipeline circulation flow is less than the minimum value of the preset flow range, increase the speed of the water pump until the pipeline circulation flow is within the preset flow range, and use the voltage when the pipeline circulation flow is within the preset flow range as the target voltage to run the water pump.

5. The constant water volume control method based on a water heater as described in claim 4, characterized in that, After operating the water pump with the voltage at which the pipeline circulation flow rate is within a preset flow range as the target voltage, the method further includes: Determine whether the water pump meets the conditions for stopping operation; If so, control the water pump to stop running.

6. The constant water volume control method based on a water heater as described in claim 1, characterized in that, The preset water pump booster start-up conditions include: The water flow rate of the water heater outlet pipe is 2L / min-8L / min.

7. A water heater, characterized in that, The water heater also includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store programs; The processor, when executing a program stored in a memory, implements the constant water volume control method based on a water heater as described in any one of claims 1 to 6.

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

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