Hot water apparatus, control method thereof, and readable storage medium

Abstract

The application provides a hot water equipment, a control method thereof and a readable storage medium. The control method comprises: monitoring water flow of water to be heated; when water flow of water to be heated is monitored to be formed, continuously recording a plurality of water flow values; and when it is identified that the plurality of water flow values are increasing or decreasing, triggering a predetermined function. Through this method, a user only needs to pull the faucet handle towards or from the hot water position to make the water flow to be heated increase or decrease, so as to be identified by the equipment controller and trigger the predetermined function. The triggering mode of the predetermined function is easy to operate and easy to remember, so that the user can control the specific function of the hot water equipment at a water use site to have a good use experience.

Description

Technical Field

[0001] This disclosure relates to the field of hot water equipment control, and more particularly to a hot water equipment, a control method for triggering its predetermined function, and a readable storage medium. Background Technology

[0002] Hot water equipment can heat water through methods such as electric heating, gas or oil combustion, solar heat exchange, and heat pump principles. Taking a gas water heater as an example, it heats the water flowing through a heat exchanger by releasing heat from the combustion of a gas-air mixture, thus providing hot water for drinking, bathing, and other domestic needs. Hot water equipment and the place where water is used are usually not in the same location. If a user wants to activate a specific function of the hot water equipment at the point of use, they need to move to the equipment or control it remotely to trigger the relevant function. Chinese patent application publication CN111406184A discloses a hot water control device and method that can implement hot water control functions at the location of the faucet, achieving specific function control through a combination of faucet opening and closing times and frequencies. However, this control of faucet opening and closing times and frequencies is quite complex, requiring users to accurately remember the number of times the faucet is opened and closed for a specific function and the different durations of each opening. Clearly, this complex faucet operation method is not user-friendly, especially for the elderly and children, as it is difficult to remember and operate accurately. Summary of the Invention

[0003] To overcome the problems existing in the prior art, this disclosure provides a hot water device, a control method thereof, and a readable storage medium.

[0004] A first aspect of this disclosure provides a control method for a hot water device, comprising: monitoring the flow of water to be heated; continuously recording several water flow values ​​when the flow of water to be heated is detected; and triggering a predetermined function when the several water flow values ​​are identified to be increasing or decreasing.

[0005] In some embodiments, by determining whether the water volume difference calculated according to the formula |W2-W1| is greater than or equal to a predetermined water volume threshold, a class can identify whether several water flow values ​​are increasing or decreasing. Here, W2 is the actual cumulative water volume from the time the water flow is formed until the above-mentioned several water flow values ​​are recorded, and W1 is the average cumulative water volume during the above-mentioned time period, with the water flow value at the time the water flow is formed as the average water flow value.

[0006] In some embodiments, the increasing or decreasing nature of a plurality of water flow values ​​is identified by determining whether the slope value calculated according to the formula |Qk-Q1| / t is less than or equal to a predetermined slope threshold. Here, Qk is the last recorded flow value among the plurality of water flow values, Q1 is the water flow value at the time the flow is formed, and t is the duration from the time the flow is formed to the time the plurality of water flow values ​​are recorded.

[0007] In some embodiments, the predetermined slope threshold is between 0.15 and 0.3.

[0008] In some embodiments, the increasing or decreasing water flow values ​​are identified by determining whether the number of current water flow values ​​that are all increased or all decreased compared to the previous water flow value is greater than or equal to a predetermined number.

[0009] In some embodiments, the predetermined functions mentioned above include a preheating cycle function or a set temperature change function.

[0010] A second aspect of this disclosure provides a computer-readable storage medium having instructions stored thereon that, when executed by a processor, implement the method steps described above.

[0011] A third aspect of this disclosure provides a hot water device, which includes a heat source, a water flow detection device, and a controller. The controller is configured to: monitor the water flow of water to be heated via the water flow detection device; continuously record several water flow values ​​when a water flow of water to be heated is detected; and trigger a predetermined function when the several water flow values ​​are identified to be increasing or decreasing.

[0012] In some embodiments, the controller identifies whether a number of water flow values ​​are increasing or decreasing by determining whether the water flow difference calculated according to the formula |W2-W1| is greater than or equal to a predetermined water flow threshold. Here, W2 is the actual cumulative water flow from the time the water flow is formed until the aforementioned water flow values ​​are recorded, and W1 is the average cumulative water flow over the aforementioned time period, with the water flow value at the time of water flow formation as the average water flow rate.

[0013] In some embodiments, the controller identifies whether a plurality of water flow values ​​are increasing or decreasing by determining whether the slope value calculated according to the formula |Qk-Q1| / t is less than or equal to a predetermined slope threshold. Here, Qk is the last recorded flow value among the plurality of water flow values, Q1 is the water flow value at the time the water flow is formed, and t is the duration from the time the water flow is formed to the time the plurality of water flow values ​​are recorded.

[0014] In some embodiments, the predetermined slope threshold is between 0.15 and 0.3.

[0015] In some embodiments, the hot water equipment further includes a gas valve, a fan, and a circulating water pump; the heat source includes a burner assembly; the control of the controller to trigger a predetermined function includes controlling the gas valve to open to a suitable opening degree, controlling the fan to operate, controlling the burner assembly to ignite and burn, and controlling the circulating water pump to operate.

[0016] The technical solutions provided by one or more embodiments of this disclosure may include the following beneficial effects: Users only need to move the faucet handle towards or from the hot water location to increase or decrease the flow rate of the water to be heated, thereby enabling the device controller to recognize and trigger a predetermined function. This method of triggering predetermined functions is easy to operate and remember, allowing users to control specific functions of hot water equipment located away from the point of use, providing a good user experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic block diagram of a hot water device connected to a hot water system according to one embodiment of the present disclosure;

[0019] Figure 2 This is a schematic diagram of a hot water device connected to a hot water system in another embodiment of this disclosure;

[0020] Figure 3 yes Figure 1 or Figure 2 The flowchart of a control method for triggering a predetermined function in one embodiment of the hot water device shown is illustrated.

[0021] Figure 4 yes Figure 1 or Figure 2 The flowchart of a control method for triggering a predetermined function in another embodiment of the hot water device shown is illustrated.

[0022] Figure 5 Is Figure 3 or Figure 4 The diagram illustrates the distribution of several water flow values ​​collected and recorded over time during the control method steps, where several water flow values ​​gradually increase.

[0023] Figure 6 Is Figure 3 or Figure 4The diagram illustrates the distribution of several water flow values ​​collected and recorded over time during the control method steps, where several water flow values ​​gradually decrease. Detailed Implementation

[0024] The embodiments shown will now be described in detail with reference to the accompanying drawings. However, these embodiments do not represent all embodiments consistent with this disclosure, and structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are all included within the scope of protection claimed in the appended claims.

[0025] Hot water equipment can heat water through methods such as electric heating, gas or oil combustion, solar heat exchange, and heat pump principles. Taking gas-fired hot water equipment as an example, it uses combustible gas as fuel, such as natural gas, city gas, liquefied petroleum gas, or biogas, to provide heat to meet users' domestic needs. Examples include gas-fired water heaters that provide domestic hot water, or dual-purpose gas boilers that can provide both domestic hot water and heating. The following will describe in detail several embodiments of hot water standby triggering predetermined function control using a gas-fired water heater as an example; however, those skilled in the art will clearly understand that hot water equipment is not limited to the gas-fired water heaters illustrated.

[0026] like Figure 1 The hot water system 100 shown in one embodiment of this disclosure includes a gas water heater connected to a water point (such as a mixing valve faucet) 70 via a cold water pipe 51 and a hot water pipe 52. A return water pipe 53 connects the gas water heater and the hot water pipe 52. The pipes can be a water flow path formed by connecting several water pipes. There can be multiple water points, each connected to a cold water pipe and a hot water pipe. In this embodiment, water point 70 is the water point furthest or relatively farthest from the gas water heater among several water points. When the gas water heater operates in bathroom mode, i.e., supplying domestic hot water, cold water and hot water are supplied to water point 70 via the cold water pipe 51 and hot water pipe 52 respectively, mixed, and then output. When the gas water heater operates in preheating circulation mode, the hot water output by the device flows back into the device via the hot water pipe 52 and the return water pipe 53 for reheating. In some embodiments, a one-way valve 54 is also provided on the return pipe 53 to limit the water flow to flow only from the hot water pipe 52 into the gas water heater via the return pipe 53.

[0027] The gas water heater includes a casing 10, which houses a burner assembly, a heat exchanger 13, and a flue gas exhaust system. The casing 10 can be assembled from several panels to form an internal space to accommodate the various components. An inlet pipe 111 is provided inside the casing 10, and an outlet pipe 112 and a gas supply pipe 113 extend from the bottom of the casing 10. The inlet pipe 111 is connected to the cold water pipe 51 via a first pipe section 1111 and to the return water pipe 53 via a second pipe section 1112, while the outlet pipe 112 is directly connected to the hot water pipe 52.

[0028] The burner assembly typically includes a gas distributor (not shown) and a burner 12. A gas valve 15 is provided on the gas supply line 113. This gas valve 15 may be an electrically controllable valve for connecting or disconnecting the gas supply passage and controlling the amount of gas supplied to the gas distributor by adjusting its opening. In some embodiments, the burner 12 includes a plurality of combustion units arranged side by side along a longitudinal direction. Each combustion unit is flat and plate-shaped, typically vertically fixed in the burner frame, with an air inlet at its lower part, a plurality of flame holes at its top, and a gas-air mixing passage connecting the air inlet and the flame holes. Gas supplied via the gas valve 15 enters the air inlet of each combustion unit through the gas distributor, mixes with simultaneously entering primary air in the gas-air mixing passage, and is delivered to the flame holes located at the top of the burner plate for combustion to generate hot flue gas. The burner assembly also includes an ignition device 121 for igniting the gas-air mixture and a flame detection device 122 for detecting the presence of a flame. In some embodiments, the ignition device 121 includes a pair of ignition electrodes extending above the flame port of the combustion unit. The flame detection device 122 includes a flame detection electrode extending above the flame port of the combustion unit.

[0029] The heat generated by combustion in burner 12 passes through heat exchanger 13. Heat exchanger 13 is typically positioned above burner 12. In some embodiments, the heat exchanger may be a finned tube heat exchanger, wherein multiple fins are provided within the heat exchanger housing, and a heat exchange water pipe meanders through these fins, with its two ends connected to an inlet pipe 111 located upstream in the water flow direction and an outlet pipe 112 located downstream in the water flow direction, respectively. The heat generated by combustion of the gas-air mixture is absorbed by the fins and further transferred to the water flowing through the heat exchange water pipe. The heated water is then transferred to hot water pipe 52 through outlet pipe 112, thereby providing users with domestic hot water for drinking, bathing, and other purposes.

[0030] In some embodiments, a fan 16 may be disposed below the burner 12 to drive airflow, thereby providing the air required for combustion and causing the flue gas generated by combustion to be collected by the smoke hood of the exhaust device, and then discharged through an exhaust pipe (not shown) connected to the smoke hood. A water inlet temperature sensor 171 is disposed at the water inlet pipe 111 (e.g., on the outer wall of the water inlet pipe) to detect the temperature of the water flowing through the water inlet pipe. In the preheating circulation mode, the water inlet temperature sensor 171 is used to detect the temperature of the return water flowing into the water inlet pipe 111 through the return water pipe 53 and the second pipe section 1112, so it is used as a return water temperature sensor at this time; while in the bathroom mode, the temperature sensor 171 is used to detect the temperature of the cold water flowing into the water inlet pipe 111 through the first pipe section 1111. A water outlet temperature sensor 172 is disposed at the water outlet pipe 112 (e.g., on the outer wall of the water outlet pipe) to detect the temperature of the water flowing out through the water outlet pipe. The temperature sensor can be a thermistor, such as a positive temperature coefficient (PTC) thermistor. In some embodiments, the temperature sensor can also be a negative temperature coefficient (NTC) temperature sensor. A water flow detection device, such as a flow sensor 14, is disposed in the water path to detect the water flow rate. In some embodiments, the flow sensor can be installed at the first pipe section 1111 to detect the flow rate of cold water entering through the cold water pipe 51. The flow sensor 14 can include a rotor assembly with a magnet and a Hall element. When water flows through the detection device, the rotor assembly is rotated, thereby utilizing the Hall effect of the Hall element to measure magnetic physical quantities. A circulating water pump 18 is disposed in the water path to drive or promote the water flow. In this embodiment, the circulating water pump 18 is connected in the inlet pipe 111. In other embodiments, the circulating water pump 18 can also be connected in the second pipe section 1112.

[0031] A controller 20 is disposed within the housing 10 for detecting and controlling the operation of various components and circuit devices within the gas water heater. In some embodiments, the controller 20 may be a control circuit comprising a processor, a memory, and several electronic components connected in a specific wiring configuration. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor. In this embodiment, the processor is the control center of the gas water heater, connecting various parts of the device via various interfaces and lines. For example, the controller 20 is wired or wirelessly connected to burner components (such as ignition device 121 and flame detection device 122), gas valve 15, fan 16, return water temperature sensor 171, outlet water temperature sensor 172, flow sensor 14, and circulating water pump 18.

[0032] The memory can be used to store instructions for any application or method that operates on the processor of the controller, as well as various types of data. The processor implements the various functions of the gas water heater by running or executing programs or instructions stored in the memory and by calling data stored in the memory. The memory can contain any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (PROM), magnetic storage, flash memory, solid-state memory, magnetic disks, or optical disks, etc.

[0033] Figure 2 The illustration shows another embodiment of the hot water system 200, which is similar to... Figure 1The hot water system 100 shown is similar, with the main difference being that the return pipe 63 is connected between the cold water pipe 51 and the hot water pipe 52 near the water point 70 via two T-joints 61 and 62. In this way, even if the user did not pre-lay a return pipe during home renovation, a return pipe can be connected between the cold and hot water pipes at a water point far from the gas water heater (such as under the sink) to achieve a preheating circulation function. Similarly, the return pipe 63 is also equipped with a one-way valve 64 to limit the water flow only from the hot water pipe 52 to the cold water pipe 51 via the return pipe 63, and further back to the gas water heater via the inlet pipe 111. Furthermore, in this embodiment, the inlet pipe 111 is directly connected to the cold water pipe 51, and the flow sensor 14 is installed on the inlet pipe 111.

[0034] Figure 3 The following describes the steps of a control method for triggering a predetermined function in one embodiment of a hot water device. The execution of these method steps by the controller 20 will also be described in detail below.

[0035] The controller 20 monitors the water flow of the water to be heated through a water flow detection device, such as the flow sensor 14 (step 301). If the user only uses cold water, they can open a separate cold water tap or turn the handle of the mixing tap to the cold water position. In this case, the cold water in the cold water pipe 51 will be directly output through the tap. If the user needs hot water, they can open a separate hot water tap or turn the handle of the mixing tap to the hot water position. The water in the hot water pipe 52 will be output through the tap, thereby driving the flow of water in the equipment pipes to be heated. Then the flow sensor 14 can detect the flow of the water to be heated. Therefore, when the flow sensor 14 collects a flow signal, it indicates that there is a flow of water to be heated in the pipes. Since the taps in users' homes are usually mixing taps, the following description will use a mixing tap as an example. However, the control methods in the following embodiments can also be applied to separate taps with separate cold and hot water. In some embodiments, in order to avoid false water flow due to water pressure fluctuations, i.e., there is no real user demand for hot water, a start threshold Q0 is usually set, such as 2.5 liters / minute. The controller 20 will also determine whether the detected water flow rate Q has reached the start-up threshold, i.e. Q≥Q0 (step 302). If so, it indicates that a flow of water to be heated has been formed, and the next step 303 will be executed; otherwise, the process will return to step 301.

[0036] If there is water to be heated flowing in the equipment pipeline, the controller 20 continuously records several water flow values ​​Q1, Q2, Q3, ..., Qk (step 303), and determines whether these several water flow values ​​are increasing or decreasing (step 304). If so, a predetermined function is triggered (step 304). For the user, the required operation is to turn on the faucet and then move the faucet handle towards the hot water position, or turn on the faucet while moving the faucet handle towards the hot water position; alternatively, the user can turn on the faucet at the hot water position and then move the handle towards the cold water position, or turn on the faucet while moving the faucet handle from the hot water position towards the cold water position.

[0037] Reference Figure 5 In the illustrated embodiment, at the operating end, the user can turn on the faucet at the cold water position or the middle position. At this time, the controller 20 detects the water flow signal and records the first water flow value Q1. The user then moves the handle towards the hot water position. During this process, the controller 20 can continuously record water flow values ​​Q2, Q3, ..., Qk at fixed time intervals, such as 0.1 seconds. Qk is the water flow value collected and recorded at the current time k, that is, the last recorded flow value among several water flow values ​​up to time k. Figure 5 The diagram shows the distribution of several collected and recorded water flow values ​​over time, with some values ​​exhibiting a gradually increasing trend. Of course, Figure 5 The diagram illustrates an ideal operating method. In actual operation, due to variations in the user's tapping speed or rhythm, the water flow values ​​may not increase regularly. That is, the increase rates between different sampling points may not be the same, and there may even be no increase between adjacent sampling points, but overall, there is a gradual increasing trend. At the controller end, the controller 20 identifies whether the water flow values ​​are increasing or decreasing by determining whether the water flow difference ΔW, calculated according to the formula |W2-W1| (i.e., the absolute value of the difference between W2 and W1), is greater than or equal to a predetermined water flow threshold W0 (i.e., ΔW ≥ W0). Here, W2 is the actual cumulative water volume from the formation of the water flow to the recording of the water flow values ​​within a time period t, and W1 is the average cumulative water volume within the aforementioned time period t, with the water flow value at the time of water flow formation as the average water flow rate. In some embodiments, ΔW can also be expressed by the following formula: like Figure 5 As shown, the water volume difference ΔW actually corresponds to the area of ​​the shaded part in the figure. When it is greater than or equal to the predetermined water volume threshold W0, such as 20 liters, it indicates that some water flow values ​​are increasing.

[0038] Figure 6 The image shows several collected and recorded water flow values ​​that decrease over time. On the control panel, the user can turn on the faucet at the hot water position and then turn the handle towards the cold water position (including the intermediate position). Of course, Figure 6The diagram illustrates an ideal operating method. In actual operation, due to variations in the speed or rhythm at which the user operates the handle, the water flow values ​​may not decrease systematically. That is, the decrease may not be uniform between different sampling points, and there may even be no decrease between adjacent sampling points. However, the overall trend is one of gradual decrease. This is because the calculation and control at the controller end... Figure 5 The examples are similar, so the applicant will not elaborate further here. In other embodiments, the controller 20 can also identify whether several water flow values ​​are increasing or decreasing by determining whether the number of current water flow values ​​that are all increased or decreased compared to the previous water flow value is greater than or equal to a predetermined number. For example, if the controller collects and records 20 water flow values, and among these 20 values, the number of current water flow values ​​that are increased / decreased compared to the previous water flow value is greater than or equal to a predetermined number of 16, it indicates that the several water flow values ​​as a whole are showing an increasing / decreasing trend, thereby triggering a predetermined function.

[0039] The preset function can be a preheating cycle function. When the preheating cycle mode of the gas water heater is triggered, the controller opens the gas valve 15 to a suitable opening degree, controls the fan 16 to run at a certain speed, controls the burner assembly to ignite and burn, and controls the circulating water pump 18 to run. Thus, the hot water output by the equipment flows back into the equipment via the hot water pipe and return pipe for reheating, and this cycle repeats continuously. The preset function can also be a temperature setting function. For example, if the user moves the handle from the middle position or cold water position towards the hot water position once, the set temperature increases by 1°C; conversely, if the user moves the handle from the hot water position towards the cold water position once, the set temperature decreases by 1°C.

[0040] Figure 4 The following describes the steps of a control method for triggering a predetermined function in another embodiment of a hot water device. The execution of these method steps by the controller 20 will also be described in detail below.

[0041] and Figure 3Similar to the illustrated embodiment, the controller 20 monitors the flow of water to be heated via the flow sensor 14 (step 401). If the flow of water to be heated is detected, the controller 20 further determines whether the detected water flow rate Q reaches the activation threshold, i.e., Q ≥ Q0 (step 402); if so, it indicates that a flow of water to be heated has formed, and the next step 403 is executed; otherwise, it returns to step 401. If there is water to be heated flowing in the equipment pipeline, the controller 20 continuously records several water flow rates Q1, Q2, Q3, ..., Qk (step 403) and determines whether these several water flow rates are increasing or decreasing (step 404). The controller 20 can identify whether several water flow rates are increasing or decreasing by determining whether the water flow difference ΔW calculated according to the formula |W2-W1| is greater than or equal to the predetermined water flow threshold W0. Wherein, W2 is the actual cumulative water volume within the duration t from the formation of the water flow to the recording of several water flow values, and W1 is the average cumulative water volume within the aforementioned duration t, with the average water flow value at the formation of the water flow as the average water flow rate. In some embodiments, to avoid the predetermined function being accidentally triggered in certain rare situations, such as when a child frequently and rapidly opens and closes the faucet while playing in water, causing the condition ΔW≥W0 to be met, the controller 20 will further determine whether the slope value calculated according to the formula |Qk-Q1| / t is less than or equal to a predetermined slope threshold S0. In some embodiments, the controller 20 continuously records several water flow values ​​Q1, Q2, Q3, ..., Qk at fixed time intervals, such as 0.1 seconds. Wherein, Q1 is the first water flow value collected and recorded when the water flow is formed; Qk is the water flow value collected and recorded at the current time k, that is, the last recorded flow value among several water flow values ​​up to the current time k; t is the time interval from collecting and recording Q1 to Qk, that is, the duration from the formation of the water flow to the recording of several water flow values. Therefore, |Qk-Q1| / t can roughly characterize the slope of the water flow rate change curve from the time the water flow forms to the current time k. The predetermined slope threshold is between 0.15 and 0.3, such as 0.15, 0.2, 0.25, and 0.3. A smaller slope indicates a smaller range of water flow rate change, that is, a relatively gentle increase or decrease.

[0042] Users simply need to move the faucet handle towards or from the hot water location to increase or decrease the flow rate of the water to be heated. This allows the equipment controller to recognize the flow and trigger a preset function. This method of triggering preset functions is easy to operate and remember, enabling users to control specific functions of the hot water equipment located away from the point of use, providing a good user experience.

[0043] All or part of the steps in the methods of the above-disclosed embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or some intermediate form. The readable storage medium can contain any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (PROM), magnetic storage, flash memory, solid-state memory, magnetic disk, or optical disk, etc.

[0044] It should be understood that the methods and apparatus disclosed above can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. The division of units in the controller is only a logical functional division; in actual implementation, there may be other division methods. For example, multiple units may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the connections between the components, parts, and units discussed above can be electrical, mechanical, or other forms of connection; they can be direct connections or indirect connections through interfaces, etc.; they can be wired connections or wireless connections.

[0045] Furthermore, the units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; some or all of the units can be selected to achieve the purpose of the disclosed embodiments according to actual needs. Additionally, the functional units in the above embodiments 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. The integrated units described above can be implemented in hardware or in a combination of hardware and software functional units.

[0046] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A control method for a hot water device, characterized in that, The method includes: Monitor the flow rate of the water to be heated; When the formation of water flow to be heated is detected, several water flow values ​​are continuously recorded. When the water flow values ​​are identified as increasing or decreasing, a predetermined function is triggered; the step of identifying the water flow values ​​as increasing or decreasing includes determining whether the water volume difference calculated according to the formula |W2-W1| is greater than or equal to a predetermined water volume threshold; wherein, W2 is the actual cumulative water volume from the time the water flow is formed until the water flow values ​​are recorded, and W1 is the average cumulative water volume during the time period with the water flow value at the time the water flow is formed as the average water flow value.

2. The control method for a hot water device according to claim 1, characterized in that: The step of continuously recording several water flow values ​​includes recording a water flow value Q1 when the water flow is formed, and then continuously recording the water flow value at fixed time intervals until time k, wherein the continuous recording time is t, and the water flow value recorded at time k is Qk; then W1 = Q1 × t.

3. The control method for the hot water equipment according to claim 2, characterized in that: The step of identifying whether several water flow values ​​are increasing or decreasing further includes determining whether the slope value calculated according to the formula |Qk-Q1| / t is less than or equal to a predetermined slope threshold.

4. The control method for the hot water equipment according to claim 3, characterized in that: The predetermined slope threshold is between 0.15 and 0.

3.

5. The control method for a hot water device according to claim 1, characterized in that: The predetermined functions include a preheating cycle function or a set temperature change function.

6. A computer-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed by the processor, they implement the method as described in any one of claims 1-5.

7. A hot water device, characterized in that: The device includes a heat source, a water flow detection device, and a controller; wherein the controller is configured to... The water flow rate of the water to be heated is monitored using a water flow detection device; When the formation of water flow to be heated is detected, several water flow values ​​are continuously recorded. When the water flow values ​​are identified as increasing or decreasing, a predetermined function is triggered; the control of identifying the water flow values ​​as increasing or decreasing includes determining whether the water volume difference calculated according to the formula |W2-W1| is greater than or equal to a predetermined water volume threshold; wherein, W2 is the actual cumulative water volume from the time the water flow is formed until the water flow values ​​are recorded, and W1 is the average cumulative water volume during the time period with the water flow value at the time the water flow is formed as the average water flow value.

8. The hot water equipment according to claim 7, characterized in that: The control of continuously recording several water flow values ​​includes recording a water flow value Q1 when the water flow is formed, and then continuously recording the water flow value at fixed time intervals until time k, wherein the continuous recording time is t, and the water flow value recorded at time k is Qk; then W1 = Q1 × t.

9. The hot water equipment according to claim 8, characterized in that: The controller's ability to identify increasing or decreasing water flow values ​​also includes determining whether the slope value calculated according to the formula |Qk-Q1| / t is less than or equal to a predetermined slope threshold.

10. The hot water equipment according to claim 9, characterized in that: The predetermined slope threshold is between 0.15 and 0.

3.

11. The hot water equipment according to claim 7, characterized in that: The hot water equipment also includes a gas valve, a fan, and a circulating water pump; the heat source includes a burner assembly; the controller triggers predetermined functions including controlling the gas valve to open to a suitable degree, controlling the fan to run, controlling the burner assembly to ignite and burn, and controlling the circulating water pump to run.

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