Outlet water temperature control method, device, equipment and medium

Abstract

The invention relates to an outlet water temperature control method and device, equipment and a medium, and the method comprises the steps: determining the normal-temperature water flow corresponding to a preset outlet water temperature value based on the preset outlet water temperature value and a normal-temperature water flow preset table; based on the first temperature value of the normal-temperature water, the second temperature value of the hot water, the normal-temperature water flow, the preset water outlet temperature value and a preset water mixing calculation formula in the water treatment equipment, the hot water flow corresponding to the preset water outlet temperature value is determined; the normal-temperature water pump and the hot water pump are controlled to be started according to the water outlet sequence, the normal-temperature water flow and the hot water flow of the normal-temperature water pump and the hot water pump in the water treatment equipment, and the starting time of the normal-temperature water pump and the hot water pump has a preset time interval, so that normal-temperature water and hot water synchronously reach a water outlet of the water treatment equipment; the time interval is determined according to the water outlet time difference of the normal-temperature water pump and the hot water pump. By adopting the method, normal-temperature water and hot water can synchronously reach the water outlet, so that the accuracy of the outlet water temperature is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, and in particular to a water outlet temperature control method, device, equipment and medium. BACKGROUND

[0002] The existing water purifiers with heating function generally have two heating modes of instant heating and heat storage, the instant heating mode is a mode of heating while water outlet, and the heat storage mode is a mode of water outlet after heating is completed.

[0003] In the related art, when the existing water treatment equipment receives a user-set water outlet temperature, the water treatment equipment controls hot water flow and / or normal temperature water flow based on the user-set water outlet temperature to meet the user's drinking water demand. However, the accuracy of the water outlet temperature of the existing water treatment equipment is not high. SUMMARY

[0004] Therefore, it is necessary to provide a water outlet temperature control method, device, computer equipment, computer readable storage medium and computer program product to improve the accuracy of the water outlet temperature of the water treatment equipment.

[0005] In a first aspect, the present application provides a water outlet temperature control method applicable to a water treatment equipment, the method comprising:

[0006] determining a normal temperature water flow corresponding to a preset water outlet temperature value based on the preset water outlet temperature value and a normal temperature water flow preset table;

[0007] determining a hot water flow corresponding to the preset water outlet temperature value based on a first temperature value of normal temperature water, a second temperature value of hot water, the normal temperature water flow, the preset water outlet temperature value and a preset mixed water calculation formula in the water treatment equipment;

[0008] controlling the normal temperature water pump and the hot water pump to start respectively according to the water outlet order of the normal temperature water pump and the hot water pump, the normal temperature water flow and the hot water flow in the water treatment equipment, and the starting time of the normal temperature water pump and the hot water pump has a preset time interval, so that the normal temperature water and the hot water reach the water outlet of the water treatment equipment synchronously; the time interval is determined according to the water outlet time difference of the normal temperature water pump and the hot water pump.

[0009] In one of the embodiments, the control process of controlling the hot water pump to start comprises:

[0010] controlling the hot water pump to start according to a first control signal in a first control stage; the duty cycle of the first control signal is 100%;

[0011] When the control duration of the first control phase reaches the first duration, the hot water pump continues to work in the second control phase according to the second control signal; the second control signal is determined based on the hot water flow rate and the preset hot water pump duty cycle flow rate, and the duty cycle of the second control signal is less than the duty cycle of the first control signal.

[0012] When the control duration of the second control phase reaches the second duration, the hot water pump continues to work in the third control phase according to the third control signal; the third control signal is determined based on the real-time hot water demand and the preset hot water pump duty cycle flow meter.

[0013] In one embodiment, the method for determining real-time hot water demand includes any of the following:

[0014] When the control duration of the second control phase reaches the second duration, the actual water output of the ambient temperature water pump is obtained. Based on the actual water output and the ambient temperature water flow rate, the change in ambient temperature water is determined. Based on the change in ambient temperature water and the preset threshold, the real-time hot water demand is determined.

[0015] When the control duration of the second control phase reaches the second duration, the remaining hot water volume of the water treatment equipment's heating tank is obtained, and the real-time hot water demand is determined based on the remaining hot water volume.

[0016] In one embodiment, the real-time hot water demand is determined based on the change in ambient temperature water and a preset threshold, including:

[0017] If the change in ambient temperature water exceeds the preset threshold, the real-time hot water demand is determined based on the preset table of hot water flow and compensation flow.

[0018] If the change in ambient temperature water does not exceed the preset threshold, the hot water flow rate is determined as the real-time hot water demand.

[0019] In one embodiment, the preset mixing calculation formula is: ,in, This refers to the hot water flow rate. Normal temperature water flow rate; The preset outlet water temperature value; This is the first temperature value; This is the second temperature value; This is the heat loss coefficient of the water treatment equipment.

[0020] In one embodiment, the method further includes:

[0021] Get the time interval between the current water usage time and the last water discharge time from the water treatment equipment;

[0022] If the interval is longer than the preset time, the heat loss coefficient is determined to be the first value; the first value is the heat loss coefficient corresponding to the first water discharge of the water treatment equipment.

[0023] If the interval is not greater than the preset time, the heat loss coefficient is determined to be the second value; the second value is the heat loss coefficient corresponding to the non-first water discharge of the water treatment equipment, and the first value and the second value are obtained based on experimental testing.

[0024] In one embodiment, the method further includes:

[0025] If the hot water flow rate does not meet the output range of the hot water pump, adjust the ambient temperature water flow rate to obtain the adjusted ambient temperature water flow rate.

[0026] Based on the adjusted ambient temperature water flow rate, adjust the hot water flow rate to obtain the adjusted hot water flow rate, until the adjusted hot water flow rate meets the output range of the hot water pump.

[0027] The sequence of water discharge from the ambient temperature water pump and the hot water pump, the flow rate of ambient temperature water and the flow rate of hot water, and the separate control of the start-up of the ambient temperature water pump and the hot water pump include:

[0028] The normal temperature water pump and the hot water pump are started according to the water outlet sequence of the normal temperature water pump and the adjusted normal temperature water flow rate and the adjusted hot water flow rate.

[0029] Secondly, this application also provides an outlet water temperature control device, which is applicable to the water treatment equipment of any of the above embodiments, comprising:

[0030] The ambient temperature water flow rate determination module is used to determine the ambient temperature water flow rate corresponding to the preset outlet water temperature value based on the preset outlet water temperature value and the ambient temperature water flow rate preset table.

[0031] The hot water flow rate determination module is used to determine the hot water flow rate corresponding to the preset outlet temperature value based on the first temperature value of the ambient water in the water treatment equipment, the second temperature value of the hot water, the flow rate of the ambient water, the preset outlet temperature value, and the preset mixing calculation formula.

[0032] The water outlet control module is used to control the start-up of the ambient temperature water pump and the hot water pump in the water treatment equipment according to the water outlet sequence, ambient temperature water flow rate and hot water flow rate, and the start-up time of the ambient temperature water pump and the hot water pump has a preset time interval so that the ambient temperature water and hot water arrive at the outlet of the water treatment equipment synchronously; the time interval is determined according to the water outlet time difference of the ambient temperature water pump and the hot water pump.

[0033] Thirdly, this application also provides a water treatment device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0034] Based on the preset outlet water temperature value and the preset table of ambient temperature water flow rate, determine the ambient temperature water flow rate corresponding to the preset outlet water temperature value;

[0035] Based on the first temperature value of ambient water, the second temperature value of hot water, the flow rate of ambient water, the preset outlet water temperature value, and the preset mixing calculation formula in the water treatment equipment, the hot water flow rate corresponding to the preset outlet water temperature value is determined.

[0036] According to the water outlet sequence, flow rate of ambient water and hot water pump in the water treatment equipment, the ambient water pump and hot water pump are started separately, and the start time of the ambient water pump and hot water pump has a preset time interval so that the ambient water and hot water arrive at the outlet of the water treatment equipment synchronously; the time interval is determined based on the water outlet time difference of the ambient water pump and hot water pump.

[0037] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0038] Based on the preset outlet water temperature value and the preset table of ambient temperature water flow rate, determine the ambient temperature water flow rate corresponding to the preset outlet water temperature value;

[0039] Based on the first temperature value of ambient water, the second temperature value of hot water, the flow rate of ambient water, the preset outlet water temperature value, and the preset mixing calculation formula in the water treatment equipment, the hot water flow rate corresponding to the preset outlet water temperature value is determined.

[0040] According to the water outlet sequence, flow rate of ambient water and hot water pump in the water treatment equipment, the ambient water pump and hot water pump are started separately, and the start time of the ambient water pump and hot water pump has a preset time interval so that the ambient water and hot water arrive at the outlet of the water treatment equipment synchronously; the time interval is determined based on the water outlet time difference of the ambient water pump and hot water pump.

[0041] Fifthly, this application also provides a computer program product comprising a computer program that, when executed by a processor, performs the following steps:

[0042] Based on the preset outlet water temperature value and the preset table of ambient temperature water flow rate, determine the ambient temperature water flow rate corresponding to the preset outlet water temperature value;

[0043] Based on the first temperature value of ambient water, the second temperature value of hot water, the flow rate of ambient water, the preset outlet water temperature value, and the preset mixing calculation formula in the water treatment equipment, the hot water flow rate corresponding to the preset outlet water temperature value is determined.

[0044] According to the water outlet sequence, flow rate of ambient water and hot water pump in the water treatment equipment, the ambient water pump and hot water pump are started separately, and the start time of the ambient water pump and hot water pump has a preset time interval so that the ambient water and hot water arrive at the outlet of the water treatment equipment synchronously; the time interval is determined based on the water outlet time difference of the ambient water pump and hot water pump.

[0045] The aforementioned outlet water temperature control method, device, equipment, and medium first determine the ambient temperature water flow rate corresponding to the preset outlet water temperature value based on the preset outlet water temperature value and the ambient temperature water flow rate preset table; then, based on the first ambient temperature water temperature value, the second hot water temperature value, the ambient temperature water flow rate, the preset outlet water temperature value, and the preset mixing calculation formula in the water treatment equipment, determine the hot water flow rate corresponding to the preset outlet water temperature value; then, according to the outlet sequence of the ambient temperature water pump and the hot water pump in the water treatment equipment, the ambient temperature water flow rate, and the hot water flow rate, the ambient temperature water pump and the hot water pump are controlled to start respectively, and the start time of the ambient temperature water pump and the hot water pump has a preset time interval, so that the ambient temperature water and the hot water arrive at the outlet of the water treatment equipment synchronously; the time interval is determined according to the outlet time difference of the ambient temperature water pump and the hot water pump. The method described above can solve the problem that existing water purifiers cannot meet the needs of different outlet water temperatures. In addition, by using a preset table for room temperature water flow and a preset mixing calculation formula, the flow rates of room temperature water and hot water are determined separately, which can ensure that the two types of water are accurately mixed. Furthermore, by reasonably determining the water outlet sequence and start-up time interval of the room temperature water pump and the hot water pump, the room temperature water and hot water arrive at the outlet synchronously, which can make the outlet water temperature closer to the preset outlet water temperature value, thus helping to improve the accuracy of the outlet water temperature. Attached Figure Description

[0046] Figure 1 A schematic diagram showing the positional relationship between the ambient temperature water outlet pipe and the hot water outlet pipe in a water treatment device provided in some embodiments of this application;

[0047] Figure 2 This is a schematic diagram of the structure of a control board in a water treatment device provided in some embodiments of this application;

[0048] Figure 3 Flowcharts of water outlet temperature control methods provided in some embodiments of this application;

[0049] Figure 4 A flowchart illustrating the control process for starting a hot water pump provided in some embodiments of this application;

[0050] Figure 5 A flowchart for determining real-time hot water demand is provided for some embodiments of this application;

[0051] Figure 6 A flowchart for determining the heat loss coefficient is provided for some embodiments of this application;

[0052] Figure 7 A flowchart for adjusting hot water flow rate is provided for some embodiments of this application;

[0053] Figure 8 Structural block diagram of the outlet water temperature control device provided in some embodiments of this application;

[0054] Figure 9 This is an internal structural diagram of a water treatment device provided in some embodiments of this application. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0056] The outlet water temperature control method provided in this application embodiment can be applied to, for example, Figure 1 The thermal storage water treatment equipment shown includes, but is not limited to, thermal storage water purifiers, water dispensers, and other devices with water treatment functions (water purification and heating, etc.). This water treatment equipment includes two outlet pipes, one of which is a room temperature water outlet pipe, including a room temperature water pump and a flow meter. The inlet of the room temperature water pump is connected to the output of the water purification module of the water treatment equipment to receive room temperature water purified by the water purification module. The outlet of the room temperature water pump is connected to the outlet of the water treatment equipment (i.e.,...) through the room temperature water pipe. Figure 1 The system connects to the outlet of a smart faucet, and a room-temperature water pump controls the flow rate of room-temperature water in the pipeline. A flow meter monitors the real-time flow rate of room-temperature water in the pipeline. The room-temperature water outlet pipeline also includes a room-temperature water sensor. Figure 1 The system includes a room-temperature water NTC (Negative Temperature Coefficient) sensor, which can be placed between the output of the water purification module and the inlet of the room-temperature water pump. This sensor monitors the room-temperature water temperature in real time. The other outlet pipe is the hot water outlet pipe, which includes a heating element and a hot water pump. The heating element and the outlet are connected via a hot water pipe, and the hot water pump is located on this pipe to control the flow rate of hot water. The heating element heats and stores the hot water, maintaining a constant temperature. The hot water outlet pipe also includes a heating element sensor. Figure 1 The NTC in the heating element is used to monitor the temperature of the hot water in the heating element in real time.

[0057] like Figure 2As shown, the water treatment equipment also includes a control board, which can be a control chip, a microcontroller development board, or other components. The control board can load and execute the outlet water temperature control method provided in this application embodiment. The ambient temperature water pump, flow meter, ambient temperature water sensor, heat exchanger sensor, and hot water pump in the water treatment equipment are all connected to the control board for data interaction. For example, the ambient temperature water pump can adjust the ambient temperature flow rate based on a first adjustment signal sent by the control board; the flow meter can send the actual water output of the ambient temperature water pump to the control board; the ambient temperature water sensor can send the first temperature value of the ambient temperature water monitored in real time to the control board; the heat exchanger sensor can send the second temperature value of the hot water monitored in real time to the control board; and the hot water pump can adjust the hot water flow rate based on a second adjustment signal sent by the control board, thereby regulating the temperature of the mixed water (i.e., the water after the hot water and ambient temperature water are mixed) at the outlet.

[0058] Specifically, when the control board receives the preset outlet water temperature value, it first determines the corresponding ambient temperature water flow rate based on the preset outlet water temperature value and the ambient temperature water flow rate preset table. The preset outlet water temperature value can be determined based on the user's selection of the outlet water temperature or the system's default setting. Then, based on the first ambient temperature water temperature value, the second hot water temperature value, the ambient temperature water flow rate, the preset outlet water temperature value, and the preset mixing calculation formula in the water treatment equipment, it determines the corresponding hot water flow rate. Then, according to the water outlet sequence of the ambient temperature water pump and the hot water pump in the water treatment equipment, the ambient temperature water flow rate, and the hot water flow rate, it controls the ambient temperature water pump and the hot water pump to start respectively, and the start time of the ambient temperature water pump and the hot water pump has a preset time interval, so that the ambient temperature water and the hot water arrive at the outlet of the water treatment equipment synchronously. The time interval is determined based on the water outlet time difference between the ambient temperature water pump and the hot water pump. In this way, the problem of existing water purifiers being unable to meet the needs of different outlet water temperatures can be solved. In addition, by using the preset flow rate table for room temperature water and the preset mixing calculation formula, the flow rates for room temperature water and hot water can be determined separately, which can ensure that the two types of water are accurately mixed. Furthermore, by reasonably determining the water outlet sequence and start-up time interval of the room temperature water pump and the hot water pump, the room temperature water and hot water can arrive at the outlet synchronously, which can make the outlet water temperature closer to the preset outlet water temperature value, thus helping to improve the accuracy of the outlet water temperature.

[0059] In one embodiment, such as Figure 3 As shown, the method is illustrated using a control panel in the aforementioned water treatment equipment as an example. In this embodiment, the method includes the following steps:

[0060] Step 302: Based on the preset outlet water temperature value and the preset table of ambient temperature water flow rate, determine the ambient temperature water flow rate corresponding to the preset outlet water temperature value.

[0061] The preset water temperature value can be a temperature value determined based on the user's specific settings or selections for the water temperature, or it can be the temperature value of the mixed water flowing out of the outlet that the water treatment equipment expects based on the user's drinking water needs. For example, if a user wants to prepare formula with warm water, they might set the preset water temperature value to 45℃.

[0062] Optionally, users can input their desired outlet water temperature through the water treatment equipment's control panel, a mobile application, or other interactive interfaces. This temperature value becomes the preset outlet water temperature. Furthermore, the control system housed in the water treatment equipment's control board can provide preset temperatures for several common usage scenarios or functions. For example, the preset outlet water temperature for the tea brewing function is 85℃, and the preset outlet water temperature for the formula preparation function is 45℃. Users can directly select the corresponding usage scenario or function based on their drinking water needs, and the system will automatically use the corresponding temperature as the preset outlet water temperature value.

[0063] Step 304: Based on the first temperature value of the ambient water in the water treatment equipment, the second temperature value of the hot water, the flow rate of the ambient water, the preset outlet water temperature value, and the preset mixing calculation formula, determine the hot water flow rate corresponding to the preset outlet water temperature value.

[0064] As mentioned above, the first temperature value of room temperature water can be monitored by a room temperature water sensor, and the second temperature value of hot water can be monitored by a heat exchanger sensor. The room temperature water flow rate preset table records the room temperature water flow rate corresponding to different preset outlet water temperatures. The room temperature water flow rate table can be determined in advance through experiments. For example, different preset outlet water temperatures can be simulated in a laboratory environment. By adjusting the ratio of room temperature water flow rate to hot water flow rate, the required room temperature water flow rate to reach each preset outlet water temperature can be measured and recorded. For instance, when the preset outlet water temperature is 40℃, after multiple experimental measurements, the average room temperature water flow rate is determined to be 2L / min. These data are then compiled into a table, resulting in the room temperature water flow rate preset table. The room temperature water flow rate is the amount of room temperature water required to reach the preset outlet water temperature value, retrieved from the room temperature water flow rate preset table.

[0065] Optionally, after obtaining the first temperature value of room temperature water, the second temperature value of hot water, the flow rate of room temperature water, and the preset outlet temperature value, the first temperature value of room temperature water, the second temperature value of hot water, the flow rate of room temperature water, and the preset outlet temperature value are substituted into the preset mixing calculation formula to calculate the hot water flow rate corresponding to the preset outlet temperature value.

[0066] Step 306: According to the water outlet sequence, normal temperature water flow rate and hot water flow rate of the normal temperature water pump and hot water pump in the water treatment equipment, control the start of the normal temperature water pump and hot water pump respectively, and the start time of the normal temperature water pump and hot water pump has a preset time interval, so that the normal temperature water and hot water arrive at the outlet of the water treatment equipment synchronously.

[0067] The order in which the ambient temperature water pump and the hot water pump discharge water can be determined during the installation and commissioning phase of the water treatment equipment, based on factors such as the pipe lengths, flow rates, and operating parameters of the ambient temperature and hot water pumps leading to the outlet. For example, some water treatment equipment may require the hot water pump to start first to ensure that hot and warm water arrive at the outlet simultaneously, while other equipment may require the ambient temperature water pump to start first to ensure that hot and warm water arrive at the outlet simultaneously, thus guaranteeing the accuracy of the outlet water temperature. The time interval can be determined based on the time difference between the discharge of water from the ambient temperature and hot water pumps.

[0068] For example, assuming that the hot water from the hot water pump reaches the outlet in 1.5 seconds, while the room temperature water from the room temperature pump reaches the outlet in 1.2 seconds, then the time interval between the two is 0.3 seconds. That is, the room temperature water pump starts 0.3 seconds after the hot water pump starts, thus ensuring that the hot water and room temperature water arrive at the outlet simultaneously.

[0069] The above-mentioned method for controlling the outlet water temperature determines the flow rates of ambient temperature water and hot water respectively through a preset flow rate table and a preset mixing calculation formula. This ensures accurate mixing of the two types of water. Furthermore, by reasonably determining the outlet sequence and start-up time interval of the ambient temperature water pump and the hot water pump, the ambient temperature water and hot water arrive at the outlet synchronously. This makes the outlet water temperature closer to the preset outlet water temperature value, thus helping to improve the accuracy of the outlet water temperature.

[0070] In one embodiment, such as Figure 4 As shown, the control process for starting the hot water pump includes:

[0071] Step 402: In the first control phase, the hot water pump is started according to the first control signal.

[0072] The first control signal is an electrical signal used to control the operating status of the hot water pump. This first control signal can be a pulse width modulation (PWM) signal. By changing the duty cycle (the ratio of the high-level time to the period), the first control signal controls the average power of the hot water pump, thereby regulating the pump's speed and flow rate. A 100% duty cycle in the first control phase allows the hot water pump to operate at full power, ensuring rapid hot water flow and a sufficient supply capacity. This allows the hot water to mix with room-temperature water at the outlet as soon as possible, reducing the user's waiting time.

[0073] Optionally, in the first control phase, the control board sends a first control signal to the hot water pump, and the duty cycle of the first control signal is 100%.

[0074] Step 404: When the control duration of the first control phase reaches the first duration, the hot water pump is controlled to continue working in the second control phase according to the second control signal.

[0075] The first duration can be determined based on the hot water flow rate corresponding to the full-load operating power of the hot water pump, the volume of the hot water pipe, and the start-up waiting time of the hot water pump itself. The hot water flow rate corresponding to the full-load operating power determines the speed at which the hot water fills the hot water pipe; the volume of the hot water pipe is the space that the hot water needs to fill; and the start-up time of the hot water pump itself is the time from startup to stable operation. Initially, there is no hot water in the hot water pipe, and there is room temperature water in the room temperature water pipe. For example, given that the pipe volume is V, the hot water flow rate corresponding to the full-load operating power of the hot water pump is Q, and the start-up time of the hot water pump is t0, then the first duration T1 = (V / Q + t0).

[0076] The second control signal is also a pulse width modulation (PWM) signal. This second control signal is determined based on the hot water flow rate and a preset hot water pump duty cycle flow rate table, and its duty cycle is less than that of the first control signal. For example, the PWM signal corresponding to the hot water flow rate is found in the preset hot water pump duty cycle flow rate table, and this PWM signal is used as the second control signal. The preset hot water pump duty cycle flow rate table is a table recording the PWM signal duty cycles corresponding to different hot water flow rates or hot water demand. This table can be obtained through experiments or theoretical calculations.

[0077] Optionally, when the control board sends the first control signal to the hot water pump for a certain duration, it searches for the PWM signal corresponding to the hot water flow rate in the preset hot water pump duty cycle flow table according to the hot water flow rate calculated in step 304, uses the PWM signal as the second control signal, and sends the second control signal to the hot water pump to control the hot water pump to start.

[0078] Step 406: When the control duration of the second control phase reaches the second duration, the hot water pump is controlled to continue working in the third control phase according to the third control signal.

[0079] In this system, the ambient temperature water pump, upon receiving the start command, undergoes a transient process of acceleration from a standstill to the target speed. During this period, the output water flow requires a certain amount of time to stabilize. In contrast, the hot water flow output by the hot water pump fluctuates more drastically during the first control phase. To ensure the smoothness and synchronization of the hot water flow and the ambient temperature water flow reaching the outlet, a second control phase is added between the first and third control phases of the hot water pump. This ensures that both the hot water and ambient temperature pumps reach a quasi-steady state. Therefore, the duration of this second control phase can be determined based on the start-up characteristics of the ambient temperature water pump and the time it takes for the hot water pump to reach a quasi-steady state after start-up. The start-up characteristics of the ambient temperature water pump include start-up time and the time to reach a stable flow rate.

[0080] For example, if the water treatment equipment is tested and found that the hot water pump needs 1.8 seconds to reach a quasi-steady state, while the room temperature water pump needs 1.5 seconds, in order to ensure the synchronicity and stability of the hot water flow and the room temperature water flow when they reach the outlet, a second duration can be set to be no less than the one with the longer stabilization time, such as 2 seconds.

[0081] The third control signal is determined based on the real-time hot water demand and the preset hot water pump duty cycle flow meter. The third control signal can also be a pulse width modulation (PWM) signal. After the hot water pump has been running for a period of time, its operating power needs to be dynamically adjusted according to actual hot water usage to meet real-time demand.

[0082] Optionally, the control board can determine a third control signal based on the real-time hot water demand and the preset hot water pump duty cycle flow meter.

[0083] In an exemplary embodiment, during the first control phase, the hot water pump starts with a 100% PWM duty cycle for a first duration, during which hot water reaches the outlet; during the second control phase, the hot water pump operates with a PWM signal corresponding to the hot water flow rate, while the ambient temperature pump is experiencing its own startup transient and supplying water to the outlet. During the second duration, the water flows from the two pumps converge and mix at the outlet, and both transition from an unstable state to a stable state; during the third control phase, the control board controls the hot water pump to start according to the third control signal.

[0084] In this embodiment, by controlling the start-up of the hot water pump in stages, the operation of the hot water pump can be made more stable, thereby better ensuring the synchronization of the hot water flow and the room temperature water flow when they reach the outlet.

[0085] In one embodiment, the method for determining the real-time hot water demand includes any of the following: when the control duration of the second control phase reaches the second duration, the actual output of the ambient temperature water pump is obtained, the ambient temperature water change is determined based on the actual output and the ambient temperature water flow rate, and the real-time hot water demand is determined based on the ambient temperature water change and a preset threshold.

[0086] When the control duration of the second control phase reaches the second duration, the remaining hot water volume of the water treatment equipment's heating tank is obtained, and the real-time hot water demand is determined based on the remaining hot water volume.

[0087] During the second control phase, when the control duration reaches the second duration, although both the ambient temperature water pump and the hot water pump have reached a stable state, in actual use, the water source for the ambient temperature water pump comes from the water purification module. The water pressure of the external water source connected to the water purification module may fluctuate significantly, which may cause fluctuations in the flow rate of the ambient temperature water pump. Therefore, it is necessary to obtain the actual water output of the ambient temperature water pump through a flow meter and determine the change based on the absolute value of the difference between the actual water output and the ambient temperature water flow rate. When the change is greater than the preset threshold, it indicates that the flow rate of the ambient temperature water pump is significantly different from the flow rate of the ambient temperature water obtained based on the preset outlet water temperature value. In order to ensure the stability of the mixed water output and the accuracy of the mixed water temperature, the real-time hot water demand needs to be re-determined.

[0088] For example, the preset threshold in this embodiment can be 50 mL / min. When the change exceeds the preset threshold, the real-time hot water demand corresponding to the difference between the actual water output and the ambient temperature water flow rate can be found based on a preset mapping table of the difference between the actual water output and the ambient temperature water flow rate and the real-time hot water demand. This mapping table can be determined in advance based on experimental measurements, and includes the correspondence between different differences between the actual water output and the ambient temperature water flow rate and the real-time hot water demand.

[0089] Furthermore, when the remaining hot water in the heating element of the water treatment equipment is less than the preset hot water threshold, if the hot water pump is still controlled using the control signal corresponding to the previous hot water flow rate, it may lead to a decrease in the hot water flow rate, thereby affecting the accuracy of the temperature of the mixed water outlet. Therefore, when the remaining hot water in the heating element decreases to the preset hot water threshold, it is also necessary to redetermine the real-time hot water demand based on the remaining hot water flow rate to ensure the accuracy of the temperature of the mixed water outlet. The preset hot water threshold can be determined during the installation and commissioning phase of the water treatment equipment.

[0090] For example, in this embodiment, the preset hot water volume threshold can be 50% of the heating tank volume. When the remaining hot water volume in the heating tank of the water treatment equipment is less than the preset hot water volume threshold, the real-time hot water demand corresponding to the current remaining hot water volume of the heating tank can be determined based on a preset mapping table of remaining hot water volume and real-time hot water demand. The preset mapping table of remaining hot water volume and real-time hot water demand can be determined in advance based on experiments, and the preset mapping table includes different correspondences between remaining hot water volume and real-time hot water demand.

[0091] In this embodiment, after the water output from the ambient temperature water pump and the hot water pump stabilizes, the changes in the ambient temperature water flow rate and the remaining hot water volume are monitored in real time. When the ambient temperature water flow rate changes significantly and the remaining hot water volume is small, the real-time hot water demand is adjusted in a timely manner to ensure the stability of the mixed water flow and the stable accuracy of the mixed water output, and to help ensure the user experience.

[0092] In one embodiment, such as Figure 5 As shown, based on the change in ambient temperature water and a preset threshold, the real-time hot water demand is determined, including:

[0093] Step 502: If the change in ambient temperature water exceeds the preset threshold, determine the real-time hot water demand based on the preset table of hot water flow rate and compensation flow rate.

[0094] The compensation flow preset table can be experimentally measured during the installation and commissioning phase of the water treatment equipment. For example, during the installation and commissioning phase, the flow rate of ambient temperature water can be manually changed to observe the changes in the actual water output, and the hot water flow rate can be adjusted to restore the actual water output to the set value. The change in hot water flow rate is then recorded each time. After multiple experiments and optimizations, a suitable compensation flow preset table value can be determined.

[0095] Optionally, the control board calculates the change based on the difference between the actual water output of the ambient temperature water pump and the ambient temperature water flow rate based on a preset outlet temperature value. This change is then compared to a preset threshold. If the change exceeds the preset threshold, the corresponding compensation flow rate is retrieved from the compensation flow rate preset table based on the difference between the actual water output and the ambient temperature water flow rate based on the preset outlet temperature value. Finally, the real-time hot water demand is determined based on the sum of the compensation flow rate and the hot water flow rate. The compensation flow rate can be either negative or positive.

[0096] Alternatively, the real-time hot water demand corresponding to the difference between the actual water output and the ambient temperature water flow can be directly found based on the above-mentioned preset mapping table between the actual water output and the ambient temperature water flow.

[0097] Step 504: If the change in ambient temperature water is not greater than the preset threshold, then the hot water flow rate is determined as the real-time hot water demand.

[0098] Understandably, if the change is not greater than the preset threshold, it indicates that the stability of the ambient temperature water flow rate is good, and there is no need to update the hot water flow rate. In this case, the current hot water flow rate can be determined as the real-time hot water demand.

[0099] Optionally, if the change is not greater than a preset threshold, the hot water flow rate is determined as the real-time hot water demand, and the hot water pump is controlled to continue operating based on the control signal corresponding to the hot water flow rate.

[0100] In this embodiment, by dynamically adjusting the real-time hot water demand based on changes in the ambient temperature water flow rate, a timely response can be made when the ambient temperature water flow rate fluctuates, thereby ensuring the stability of the actual water output. Furthermore, when there are significant changes in the ambient temperature water flow rate, adjusting only the hot water flow rate can reduce the possibility of abrupt changes in the mixed water flow, thus ensuring the stability of the mixed water output and ultimately guaranteeing a good user experience.

[0101] In one embodiment, the preset mixing calculation formula is: ,in, This refers to the hot water flow rate. Normal temperature water flow rate; The preset outlet water temperature value; This is the first temperature value; This is the second temperature value; This is the heat loss coefficient of the water treatment equipment.

[0102] Understandably, according to thermodynamic formulas, when room temperature water and hot water are mixed, under ideal conditions, the heat absorbed by the room temperature water is equal to the heat released by the hot water. ,and ,in, For specific heat capacity, For the quality of room temperature water, This refers to the temperature of the mixed water, which is also the preset outlet water temperature value mentioned above. This is the room temperature water temperature, which is also the first temperature value mentioned above. And... ,in, For the quality of hot water, This is the temperature of the hot water, which is also the second temperature value mentioned above. Therefore, we can conclude that... .

[0103] Since the actual mixing and discharging of water is not an ideal heat exchange process between hot and room temperature water, other heat losses also occur, such as heat loss in the hot water pipes and through the air. Therefore, a heat loss coefficient needs to be introduced. To offset these heat losses. Therefore, we obtain The final formula for calculating the mixed water is: Heat loss coefficient This can be obtained using heat loss testing methods. Furthermore, considering that the heat loss when the first cup of water is dispensed differs from that of non-first cups, the heat loss coefficients for the first and non-first cups are different to ensure the accuracy of the temperature at the time of dispensing each cup.

[0104] For example, the method for determining the heat loss coefficient of the first cup of water includes: first, starting the water treatment equipment and allowing it to operate normally for a period of time to ensure that the temperatures of the hot water and room temperature water reach a stable state; then, collecting the hot water while simultaneously starting a timer and using a temperature sensor to measure the outlet water temperature of the hot water for the first three seconds. And record the initial set temperature at this time. To ensure data accuracy, multiple experiments can be conducted, and relevant data from each experiment can be recorded; then, the heat loss of the first cup of water in each experiment can be calculated. According to the calculation formula , The heat loss data of the first cup of water obtained from multiple experiments were averaged to obtain... ,in, This refers to the specific heat capacity of hot water. For the quality of hot water; finally, according to the calculation formula. Calculate the heat loss coefficient of the first cup of water. ,in, The volume of water dispensed from the first cup in the first three seconds.

[0105] The method for determining the heat loss coefficient of non-first cup water includes: after the first cup of water has been collected, continue collecting hot water, and starting from the fourth second, use a temperature sensor to measure the outlet water temperature three seconds later. Similarly, record the initial water temperature setting. Repeat the experiment multiple times and calculate the heat loss of non-initial water in each experiment. According to the calculation formula ,at this time, The heat loss data of non-first cup water obtained from multiple experiments were averaged to obtain... Finally, according to the calculation formula Calculate the heat loss coefficient of the non-first cup of water. ,in, This represents the volume of water dispensed from the non-first cup in the first three seconds. Additionally, environmental factors such as temperature and humidity during the experiment will affect heat loss. Experiments can be conducted under different environmental conditions to establish a correlation model between environmental factors and the heat loss coefficient, allowing for adjustments to the heat loss coefficient based on specific environmental conditions in practical applications.

[0106] In one embodiment, such as Figure 6 As shown, the method also includes:

[0107] Step 602: Obtain the time interval between the current water usage time and the last water discharge time from the water treatment equipment.

[0108] Optionally, a flow sensor can be installed at the outlet of the water treatment equipment. When water flows through, the flow sensor generates an electrical signal. By connecting a timing chip or utilizing the timing function of a microcontroller, the time when the flow sensor detects water flow each time is recorded. When water flow is detected again, the difference between the current time and the previously recorded time is calculated to obtain the interval duration.

[0109] In addition, a time recording module can be set up in the control board. When a water outlet signal is received from the device, the current time is recorded. When the water outlet signal is received again, the difference between the two times is calculated to obtain the interval duration.

[0110] Step 604: If the interval is longer than the preset duration, determine the heat loss coefficient as the first value.

[0111] The first value is the heat loss coefficient corresponding to the first water output from the water treatment equipment. When the interval is longer than the preset time, such as 2 minutes, it indicates that the water collected at the outlet is the first cup of water, and the first value is determined based on the heat loss coefficient corresponding to the first cup of water. The preset time can be determined experimentally, for example, based on the time it takes for the hot water pipes to cool down to room temperature or the preset temperature.

[0112] For example, in this embodiment, when it is determined that the water being collected is the first cup of water, the heat loss coefficient can be determined to be 0.8.

[0113] Step 606: If the interval duration is not greater than the preset duration, determine the heat loss coefficient as the second value.

[0114] The second value is the heat loss coefficient corresponding to the non-first water output of the water treatment equipment. The first and second values ​​are obtained based on experimental testing. When the interval is not greater than the preset time, it indicates that the water being collected is not the first cup of water. In this case, the second value can be determined based on the heat loss coefficient corresponding to the non-first cup of water.

[0115] For example, in this embodiment, when it is determined that the water being collected is not the water from the first cup, the heat loss coefficient can be determined to be 0.96.

[0116] In this embodiment, by determining whether the water being used at the current time is the first or a second cup of water by measuring the time interval between the current water usage time and the last water dispensing time from the water treatment device, and by determining the corresponding heat loss coefficient, the accuracy of the hot water flow calculation results can be improved, thereby helping to ensure the accuracy of the mixed water temperature at the outlet.

[0117] In one embodiment, such as Figure 7 As shown, the method also includes:

[0118] Step 702: If the hot water flow rate does not meet the output range of the hot water pump, adjust the ambient temperature water flow rate to obtain the adjusted ambient temperature water flow rate.

[0119] Because different hot water pumps have different characteristics, their corresponding water output ranges also differ, meaning their water output capabilities vary. For example, in this embodiment, the hot water pump's output range is 0.5L / min to 2L / min. When the hot water flow rate obtained based on the ambient temperature water flow rate and the preset mixing formula exceeds the hot water pump's output range (i.e., less than 0.5L / min or greater than 2L / min), the ambient temperature water flow rate needs to be adjusted to ensure the accuracy of the mixing temperature.

[0120] Optionally, when the hot water flow rate does not meet the output range of the hot water pump, the ambient temperature water flow rate can be adjusted according to a preset method. For example, based on experimental measurements, when the calculated hot water flow rate is greater than the upper limit of the output range, the ambient temperature water flow rate is reduced by 50 mL / min until the hot water flow rate is lower than the upper limit or the ambient temperature water flow rate is also lower than its own lower limit. When the calculated hot water flow rate is less than the lower limit of the output range, the ambient temperature water flow rate is increased by 50 mL / min until the hot water flow rate is higher than the lower limit or the ambient temperature water flow rate is also higher than its own upper limit.

[0121] Step 704: Based on the adjusted ambient temperature water flow rate, adjust the hot water flow rate to obtain the adjusted hot water flow rate until the adjusted hot water flow rate meets the output range of the hot water pump.

[0122] Optionally, after determining the adjusted room temperature water flow rate, the corresponding adjusted hot water flow rate can be calculated based on the above-mentioned preset mixing calculation formula. If the hot water flow rate still does not meet the output range of the hot water pump, the room temperature water flow rate can be adjusted in the manner of step 702 until the hot water flow rate meets the output range of the hot water pump or exceeds the output range of the room temperature water pump.

[0123] Step 706: Control the start of the ambient temperature water pump and the hot water pump according to the water outlet sequence of the ambient temperature water pump and the hot water pump, the adjusted ambient temperature water flow rate and the adjusted hot water flow rate.

[0124] Understandably, after both the ambient temperature water flow rate and the hot water flow rate are updated, it is necessary to control the start of the ambient temperature water pump and the hot water pump separately according to the updated ambient temperature water flow rate and the adjusted hot water flow rate, as well as the water output sequence of the ambient temperature water pump and the hot water pump, in order to ensure the accuracy of the mixed water temperature.

[0125] In this embodiment, after calculating the hot water flow rate based on the ambient temperature water volume and the preset mixing formula, it is first determined whether the hot water flow rate is within the adjustable range of the hot water pump outlet flow rate. If the calculated hot water flow rate is not within the adjustable range of the hot water pump outlet flow rate, the ambient temperature water flow rate is adjusted so that the hot water flow rate is adjusted synchronously until the adjusted hot water flow rate is within the adjustable range of the hot water pump outlet flow rate. This ensures the accuracy of the mixing temperature while also extending the service life of the hot water pump.

[0126] In one detailed embodiment, the outlet water temperature control method includes the following steps:

[0127] Step A10: Based on the preset outlet water temperature value and the preset table of ambient temperature water flow rate, determine the ambient temperature water flow rate corresponding to the preset outlet water temperature value.

[0128] Step A20: Based on the first temperature value of the ambient water in the water treatment equipment, the second temperature value of the hot water, the flow rate of the ambient water, the preset outlet water temperature value, and the preset mixing calculation formula, determine the hot water flow rate corresponding to the preset outlet water temperature value.

[0129] The preset mixing calculation formula is as follows: ,in, This refers to the hot water flow rate. Normal temperature water flow rate; The preset outlet water temperature value; This is the first temperature value; This is the second temperature value; This is the heat loss coefficient of the water treatment equipment. When determining the heat loss coefficient, the interval between the current water usage time and the last water discharge time from the water treatment equipment is obtained. If the interval is longer than a preset time, the heat loss coefficient is determined as a first value; the first value is the heat loss coefficient corresponding to the first water discharge from the water treatment equipment. If the interval is not greater than the preset time, the heat loss coefficient is determined as a second value; the second value is the heat loss coefficient corresponding to subsequent water discharges from the water treatment equipment.

[0130] Step A30: According to the water outlet sequence, normal temperature water flow rate and hot water flow rate of the normal temperature water pump and hot water pump in the water treatment equipment, control the start of the normal temperature water pump and hot water pump respectively, and the start time of the normal temperature water pump and hot water pump has a preset time interval, so that the normal temperature water and hot water arrive at the outlet of the water treatment equipment synchronously.

[0131] The time interval is determined based on the time difference between the water output of the ambient temperature pump and the hot water pump.

[0132] In addition, the control process for starting the hot water pump includes the following steps:

[0133] Step B10: In the first control phase, the hot water pump is started according to the first control signal; the duty cycle of the first control signal is 100%.

[0134] Step B20: When the control duration of the first control phase reaches the first duration, the hot water pump is controlled to continue working in the second control phase according to the second control signal. The second control signal is determined based on the hot water flow rate and the preset hot water pump duty cycle flow rate, and the duty cycle of the second control signal is less than the duty cycle of the first control signal.

[0135] Step B30: When the control duration of the second control phase reaches the second duration, the hot water pump is controlled to continue working in the third control phase according to the third control signal; the third control signal is determined based on the real-time hot water demand and the preset hot water pump duty cycle flow meter.

[0136] The method for determining the real-time hot water demand includes: when the control duration of the second control phase reaches the second duration, the actual water output of the ambient temperature water pump is obtained. If the change between the actual water output and the ambient temperature water flow rate is greater than a preset threshold, the real-time hot water demand is determined according to the preset table of hot water flow rate and compensation flow rate. If the change is not greater than the preset threshold, the hot water flow rate is determined as the real-time hot water demand.

[0137] Alternatively, when the control duration of the second control phase reaches the second duration, the remaining hot water volume of the water treatment equipment's heating tank is obtained, and the real-time hot water demand is determined based on the remaining hot water volume.

[0138] The water outlet temperature control method of this application can solve the problem that existing water purifiers cannot meet the needs of different water outlet temperatures. By using a preset table of room temperature water flow rate and a preset mixing calculation formula, the flow rates of room temperature water and hot water are determined separately, which can ensure accurate mixing of the two types of water. In addition, by reasonably determining the water outlet sequence and start-up time interval of the room temperature water pump and the hot water pump, the room temperature water and hot water arrive at the outlet synchronously, which can make the water outlet temperature closer to the preset water outlet temperature value, thus helping to improve the accuracy of the water outlet temperature.

[0139] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0140] Based on the same inventive concept, this application also provides an outlet water temperature control device for implementing the above-mentioned outlet water temperature control method. The solution provided by this device is similar to the solution described in the above-described method. Therefore, the specific limitations of one or more outlet water temperature control device embodiments provided below can be found in the limitations of the outlet water temperature control method above, and will not be repeated here.

[0141] In one embodiment, such as Figure 8 As shown, an outlet water temperature control device is provided, applicable to the water treatment equipment provided in any of the above embodiments. The device includes: a normal temperature water flow rate determination module 802, a hot water flow rate determination module 804, and an outlet water control module 806, wherein:

[0142] The ambient temperature water flow rate determination module 802 is used to determine the ambient temperature water flow rate corresponding to the preset outlet water temperature value based on the preset outlet water temperature value and the ambient temperature water flow rate preset table.

[0143] The hot water flow rate determination module 804 is used to determine the hot water flow rate corresponding to the preset outlet temperature value based on the first temperature value of the ambient water in the water treatment equipment, the second temperature value of the hot water, the flow rate of the ambient water, the preset outlet temperature value, and the preset mixing calculation formula.

[0144] The water outlet control module 806 is used to control the start of the ambient temperature water pump and the hot water pump in the water treatment equipment according to the water outlet sequence, ambient temperature water flow rate and hot water flow rate, respectively. The start-up time of the ambient temperature water pump and the hot water pump has a preset time interval so that the ambient temperature water and hot water arrive at the outlet of the water treatment equipment synchronously. The time interval is determined according to the water outlet time difference between the ambient temperature water pump and the hot water pump.

[0145] In one embodiment, the water outlet control module 806 includes a hot water pump control submodule, which is used to control the hot water pump to start according to a first control signal in a first control phase; the duty cycle of the first control signal is 100%; when the control duration of the first control phase reaches a first duration, the hot water pump is controlled to continue working according to a second control signal in a second control phase; the second control signal is determined based on the hot water flow rate and a preset hot water pump duty cycle flow rate table, and the duty cycle of the second control signal is less than the duty cycle of the first control signal; when the control duration of the second control phase reaches a second duration, the hot water pump is controlled to continue working according to a third control signal in a third control phase; the third control signal is determined based on the real-time hot water demand and the preset hot water pump duty cycle flow rate table.

[0146] In one embodiment, the hot water pump control submodule is further configured to, when the control duration of the second control phase reaches the second duration, acquire the actual water output of the ambient temperature water pump, determine the ambient temperature water change based on the actual water output and the ambient temperature water flow rate, and determine the real-time hot water demand based on the ambient temperature water change and a preset threshold; or, when the control duration of the second control phase reaches the second duration, acquire the remaining hot water volume of the water treatment equipment's heating tank, and determine the real-time hot water demand based on the remaining hot water volume.

[0147] In one embodiment, the hot water pump control submodule is further configured to determine the real-time hot water demand based on a preset table of hot water flow rate and compensation flow rate if the change in ambient temperature water is greater than a preset threshold; and to determine the hot water flow rate as the real-time hot water demand if the change in ambient temperature water is not greater than the preset threshold.

[0148] In one embodiment, the hot water flow rate determination module 804 is further configured to define a preset mixing calculation formula as follows: ,in, This refers to the hot water flow rate. Normal temperature water flow rate; The preset outlet water temperature value; This is the first temperature value; This is the second temperature value; This is the heat loss coefficient of the water treatment equipment.

[0149] In one embodiment, the hot water flow rate determination module 804 includes a heat loss compensation submodule, which is used to obtain the interval between the current water usage time and the last water discharge time of the water treatment equipment; if the interval is longer than a preset time, the heat loss coefficient is determined to be a first value; the first value is the heat loss coefficient corresponding to the first water discharge of the water treatment equipment; if the interval is not longer than the preset time, the heat loss coefficient is determined to be a second value; the second value is the heat loss coefficient corresponding to the non-first water discharge of the water treatment equipment, and the first and second values ​​are obtained based on experimental testing.

[0150] In one embodiment, the hot water flow rate determination module 804 is further configured to adjust the ambient temperature water flow rate to obtain the adjusted ambient temperature water flow rate if the hot water flow rate does not meet the outlet flow rate range of the hot water pump; adjust the hot water flow rate based on the adjusted ambient temperature water flow rate to obtain the adjusted hot water flow rate, until the adjusted hot water flow rate meets the outlet flow rate range of the hot water pump; and control the start of the ambient temperature water pump and the hot water pump according to the outlet sequence of the ambient temperature water pump and the hot water pump, the ambient temperature water flow rate and the hot water flow rate, respectively, including: controlling the start of the ambient temperature water pump and the hot water pump according to the outlet sequence of the ambient temperature water pump and the hot water pump, the adjusted ambient temperature water flow rate and the adjusted hot water flow rate, respectively.

[0151] Each module in the aforementioned outlet water temperature control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0152] In one embodiment, a water treatment device is provided that has similar functions to a computer device, and its internal structure diagram can be as follows: Figure 9As shown, the water treatment equipment includes a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides the environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for controlling the outlet water temperature. The display screen can be an LCD screen or an e-ink screen. The input devices of the water treatment equipment can be a touch layer covering the display screen, or buttons, a trackball, or a touchpad located on the outer casing of the water treatment equipment.

[0153] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0154] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the above method embodiments.

[0155] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0156] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0157] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0158] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0159] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for controlling the outlet water temperature, characterized in that, The method is applicable to water treatment equipment, and the method includes: Based on the preset outlet water temperature value and the preset table of room temperature water flow rate, determine the room temperature water flow rate corresponding to the preset outlet water temperature value; Based on the first temperature value of the ambient water, the second temperature value of the hot water, the flow rate of the ambient water, the preset outlet water temperature value, and the preset mixing calculation formula in the water treatment equipment, the flow rate of the hot water corresponding to the preset outlet water temperature value is determined. According to the water outlet sequence of the ambient temperature water pump and the hot water pump in the water treatment equipment, the ambient temperature water flow rate and the hot water flow rate, the ambient temperature water pump and the hot water pump are controlled to start respectively, and the start time of the ambient temperature water pump and the hot water pump has a preset time interval, so that the ambient temperature water and the hot water arrive at the outlet of the water treatment equipment synchronously; the time interval is determined according to the water outlet time difference of the ambient temperature water pump and the hot water pump.

2. The method according to claim 1, characterized in that, The control process for starting the hot water pump includes: In the first control phase, the hot water pump is started according to the first control signal; the duty cycle of the first control signal is 100%. When the control duration of the first control phase reaches the first duration, the hot water pump is controlled to continue working in the second control phase according to the second control signal; the second control signal is determined based on the hot water flow rate and the preset hot water pump duty cycle flow rate table, and the duty cycle of the second control signal is less than the duty cycle of the first control signal; When the control duration of the second control phase reaches the second duration, the hot water pump is controlled to continue working in the third control phase according to the third control signal; the third control signal is determined based on the real-time hot water demand and the preset hot water pump duty cycle flow meter.

3. The method according to claim 2, characterized in that, The method for determining the real-time hot water demand includes any of the following: When the control duration of the second control phase reaches the second duration, the actual water output of the ambient temperature water pump is obtained, the ambient temperature water change is determined based on the actual water output and the ambient temperature water flow rate, and the real-time hot water demand is determined based on the ambient temperature water change and a preset threshold. When the control duration of the second control phase reaches the second duration, the remaining hot water volume of the heating tank of the water treatment equipment is obtained, and the real-time hot water demand is determined based on the remaining hot water volume.

4. The method according to claim 3, characterized in that, The determination of the real-time hot water demand based on the change in ambient temperature water and a preset threshold includes: If the change in ambient temperature water exceeds the preset threshold, the real-time hot water demand is determined according to the hot water flow rate and the compensation flow rate preset table. If the change in ambient temperature water is not greater than the preset threshold, then the hot water flow rate is determined as the real-time hot water demand.

5. The method according to claim 1, characterized in that, The preset formula for calculating mixed water is: ,in, The hot water flow rate; The flow rate of the ambient temperature water; The preset outlet water temperature value; The first temperature value; This is the second temperature value; The heat loss coefficient of the water treatment equipment is denoted as .

6. The method according to claim 5, characterized in that, The method further includes: Obtain the time interval between the current water usage time and the last water discharge time from the water treatment equipment; If the interval is longer than a preset duration, the heat loss coefficient is determined to be a first value; the first value is the heat loss coefficient corresponding to the first water discharge from the water treatment equipment. If the interval duration is not greater than the preset duration, the heat loss coefficient is determined to be a second value; the second value is the heat loss coefficient corresponding to the water treatment equipment when it is not the first time water is discharged, and the first value and the second value are obtained based on experimental testing.

7. The method according to claim 1, characterized in that, The method further includes: If the hot water flow rate does not meet the output range of the hot water pump, then adjust the ambient temperature water flow rate to obtain the adjusted ambient temperature water flow rate; Based on the adjusted ambient temperature water flow rate, the hot water flow rate is adjusted to obtain the adjusted hot water flow rate until the adjusted hot water flow rate meets the output range of the hot water pump. The sequence of water discharge from the ambient temperature water pump and the hot water pump, the flow rate of the ambient temperature water, and the flow rate of the hot water, respectively control the start-up of the ambient temperature water pump and the hot water pump, including: The ambient temperature water pump and the hot water pump are started according to the water outlet sequence of the ambient temperature water pump and the hot water pump, the adjusted ambient temperature water flow rate and the adjusted hot water flow rate, respectively.

8. A water outlet temperature control device, characterized in that, The apparatus is suitable for the water treatment equipment as described in any one of claims 1-7, the apparatus comprising: A room temperature water flow rate determination module is used to determine the room temperature water flow rate corresponding to the preset outlet water temperature value based on a preset outlet water temperature value and a room temperature water flow rate preset table. The hot water flow rate determination module is used to determine the hot water flow rate corresponding to the preset outlet temperature value based on the first temperature value of the ambient water in the water treatment equipment, the second temperature value of the hot water, the flow rate of the ambient water, the preset outlet temperature value, and the preset mixing calculation formula. The water outlet control module is used to control the start of the ambient temperature water pump and the hot water pump in the water treatment equipment according to the water outlet sequence, the ambient temperature water flow rate and the hot water flow rate, respectively. The start-up time of the ambient temperature water pump and the hot water pump has a preset time interval so that the ambient temperature water and the hot water arrive at the outlet of the water treatment equipment synchronously. The time interval is determined based on the water outlet time difference between the ambient temperature water pump and the hot water pump.

9. A water treatment device, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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