Control method of water dispenser, water dispenser, device, medium and product

Abstract

The present disclosure provides a control method of a water dispenser, the water dispenser, the device, the medium, the product, the control method comprising: in response to the temperature at the water outlet of the heating module being greater than a temperature threshold value, and / or in response to the temperature at the water outlet of the heating module being greater than a set water outlet temperature and the temperature rise speed being greater than a speed threshold value, controlling the second motor pump to operate to draw back the water output by the heating module to the water storage module; the temperature threshold value is not less than the set water outlet temperature; controlling the first motor pump to operate to output water from the water storage module to the heating module; in response to the temperature at the water outlet of the heating module falling within the range of the set water outlet temperature and the temperature threshold value and the temperature rise speed being not greater than the speed threshold value, controlling the water dispenser to output water. The present disclosure can prevent steam spraying and unstable water outlet temperature by starting the back-drawing of the second motor pump and pressure relief, can quickly restore the temperature at the water outlet of the heating module to the set water outlet temperature, and can prevent sudden changes in water temperature.

Description

Technical Field

[0001] This disclosure relates to the field of water dispenser control technology, specifically to a control method for a water dispenser, as well as the water dispenser, equipment, medium, and product. Background Technology

[0002] For instantaneous heating methods, the heating element is typically installed at the water outlet (e.g., a faucet). During heating, excessively high temperatures can lead to excessive steam ejection. This occurs because the water inside the heating element becomes too hot, causing it to vaporize and form a large amount of gas at the outlet. This gas buildup increases the local pressure at the outlet, which in turn pressurizes the pump, reducing the flow rate through the heating element. This reduced flow rate causes the water inside the heating element to heat up even more, generating even more gas and resulting in excessive steam ejection at the outlet. At this point, stopping heating or reducing the heating power is necessary to eliminate the steam ejection. However, this low-power heating leads to a problem where the water temperature drops too low after the steam ejection stops. Summary of the Invention

[0003] The technical problem to be solved by this disclosure is to overcome the defects of existing water dispensers in the instant heating process, such as excessive pressure at the water outlet and inability to accurately control the water temperature, and to provide a control method for a water dispenser, as well as the water dispenser, equipment, medium, and product.

[0004] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0005] In a first aspect, a control method for a water dispenser is provided. The water dispenser includes a water storage module, a heating module, a first motor pump, and a second motor pump. The two ends of the first motor pump are respectively connected to the water outlet of the water storage module and the water inlet of the heating module, and the two ends of the second motor pump are respectively connected to the water outlet of the heating module and the water inlet of the water storage module.

[0006] The control method includes:

[0007] In response to the temperature at the outlet of the heating module being greater than a temperature threshold, and / or in response to the temperature at the outlet of the heating module being greater than a set outlet water temperature and the temperature rise rate being greater than a speed threshold, the second motor pump is controlled to operate to pump the water output by the heating module back to the water storage module; the temperature threshold is not less than the set outlet water temperature;

[0008] Control the first motor pump to operate so that water is discharged from the water storage module to the heating module;

[0009] In response to the temperature at the outlet of the heating module falling within the range of the set outlet water temperature and the temperature threshold, and the temperature rise rate not exceeding the speed threshold, the water dispenser is controlled to dispense water.

[0010] Optionally, controlling the second motor pump to operate in response to the temperature at the outlet of the heating module being greater than a set outlet temperature and the temperature rise rate being greater than a speed threshold includes:

[0011] In response to the temperature at the outlet of the heating module being greater than the set outlet temperature, and the temperature rise being greater than the temperature rise threshold at least twice within a preset time period, the second motor pump is controlled to operate.

[0012] Optionally, controlling the operation of the second motor pump includes:

[0013] Adjust the operating speed of the second motor pump; wherein the operating speed of the second motor pump is positively correlated with the temperature rise rate, and / or the operating speed of the second motor pump is positively correlated with the heating power of the heating module, and / or the operating speed of the second electrode is positively correlated with the first temperature difference; the first temperature difference is the difference between the temperature at the outlet of the heating module and the set outlet water temperature;

[0014] And / or, adjust the power of the second motor pump; the power of the second motor pump is positively correlated with the temperature rise rate, and / or the power of the second motor pump is positively correlated with the heating power of the heating module, and / or the power of the second motor pump is positively correlated with the first temperature difference.

[0015] Optionally, after controlling the first motor pump to operate so that water is discharged from the water storage module to the heating module, the method further includes:

[0016] In response to the temperature at the outlet of the heating module being not less than the set outlet temperature and not greater than the temperature threshold, the second motor pump is controlled to stop running.

[0017] Optionally, the control method further includes:

[0018] In response to the temperature at the inlet of the heating module being lower than the set outlet water temperature, a first flow rate of water flowing through the heating module is determined based on the quotient of a first parameter and a second parameter; the first parameter is the product of the heating power of the heating module and the unit time, and the second parameter is the product of the specific heat capacity of water and the second temperature difference, where the second temperature difference is the difference between the temperature at the inlet of the heating module and the set outlet water temperature.

[0019] Based on the correspondence between flow rate and control parameters, determine the first control parameter corresponding to the first flow rate;

[0020] The first motor pump is controlled to operate with the first control parameters so that water is discharged from the water storage module to the heating module.

[0021] Optionally, the control method further includes:

[0022] In response to the temperature at the outlet of the heating module being lower than the set outlet temperature, the second motor pump is controlled to run to pump the water output from the heating module back to the water storage module.

[0023] In response to the heating power of the heating module being not less than the rated power, a second flow rate flowing through the heating module is determined based on the quotient of the third parameter and the fourth parameter; a second control parameter corresponding to the second flow rate is determined based on the correspondence between the flow rate and the control parameter; the first motor pump is controlled to operate with the second control parameter; the third parameter is the product of the heating power of the heating module and the unit time, the fourth parameter is the product of the specific heat capacity of water and the third temperature difference, and the third temperature difference is the difference between the temperature at the water inlet of the heating module and the set outlet water temperature;

[0024] In response to the heating power of the heating module being less than the rated power, the heating power of the heating module is adjusted based on a PID algorithm.

[0025] In a second aspect, a water dispenser is provided, the water dispenser including a water storage module, a heating module, a first motor pump, a first temperature detection module, a second temperature detection module, and a controller;

[0026] Water storage module, used to store water;

[0027] A heating module is used to heat the water output from the water storage module;

[0028] The first motor pump has one end connected to the outlet of the water storage module and the other end connected to the inlet of the heating module.

[0029] The second motor pump is connected at one end to the outlet of the heating module and at the other end to the inlet of the water storage module.

[0030] The controller is electrically connected to the first motor pump, the second motor pump, the first temperature detection module, and the second temperature detection module, respectively; the controller is used to implement the control method described in the first aspect.

[0031] Optionally, a one-way valve is provided between the heating module and the water outlet of the water dispenser;

[0032] And / or,

[0033] The water dispenser includes a composite filter element and a nanofiltration membrane filter element, which are disposed between the water storage module and the water inlet of the water dispenser.

[0034] Thirdly, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and for running on the processor, wherein the processor executes the computer program to implement the control method described in the first aspect.

[0035] Fourthly, a computer-readable storage medium is provided, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the control method described in the first aspect.

[0036] Fifthly, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the control method described in the first aspect.

[0037] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0038] The positive and progressive effects of this disclosure are as follows: In the embodiments of this disclosure, when the temperature of the water outlet of the heating module is greater than the temperature threshold or the temperature rise is greater than the speed threshold, it is determined that there is a risk of steam spraying at the water outlet of the water dispenser. By starting the second motor pump to pump back and depressurize, the heating module is protected against steam spraying, preventing steam spraying and unstable water temperature. The temperature of the water outlet of the heating module can be quickly restored to the set water temperature, preventing sudden changes in water temperature. Attached Figure Description

[0039] Figure 1 A schematic diagram of the structure of a water dispenser provided as an exemplary embodiment of this disclosure;

[0040] Figure 2 A first flowchart of a control method for a water dispenser provided as an exemplary embodiment of this disclosure;

[0041] Figure 3 A second flowchart of a control method for a water dispenser provided as an exemplary embodiment of this disclosure;

[0042] Figure 4 A third flowchart of a control method for a water dispenser provided as an exemplary embodiment of this disclosure;

[0043] Figure 5 A control flowchart of a first motor pump for a water dispenser control method provided as an exemplary embodiment of this disclosure;

[0044] Figure 6 A control flowchart of a first motor pump and a second motor pump for a water dispenser control method provided as an exemplary embodiment of this disclosure;

[0045] Figure 7A fourth flowchart of a control method for a water dispenser provided as an exemplary embodiment of this disclosure;

[0046] Figure 8 A schematic diagram of the structure of another water dispenser provided as an exemplary embodiment of this disclosure;

[0047] Figure 9 A schematic diagram of the structure of an electronic device provided for an exemplary embodiment of this disclosure. Detailed Implementation

[0048] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0049] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the document does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0050] As illustrated herein, unless the context clearly indicates otherwise, the words “a,” “an,” “an,” and / or “the” do not specifically refer to the singular and may also include the plural. Generally speaking, the terms “comprising” and “including” only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0051] The definitions used herein, such as the terms “having,” “may have,” “comprising,” or “may include,” indicate the presence of the corresponding function, operation, element, etc., and do not limit the presence of one or more other functions, operations, elements, etc. Furthermore, it should be understood that the terms “comprising” or “having” as used herein indicate the presence of the features, figures, steps, operations, elements, components, or combinations thereof described in the specification, without excluding the presence or addition of one or more other features, figures, steps, operations, elements, components, or combinations thereof.

[0052] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not be construed as an unnecessary limitation. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0053] This disclosure provides an exemplary embodiment of a water dispenser, such as... Figure 1 As shown, the water dispenser includes a water storage module 11, a heating module 13, a first motor pump 12, and a second motor pump 14. The two ends of the first motor pump 12 are connected to the water outlet of the water storage module 11 and the water inlet of the heating module 13, respectively. The two ends of the second motor pump 14 are connected to the water outlet of the heating module 13 and the water inlet of the water storage module 11, respectively.

[0054] The water storage module is used to store water. The first motor pump is used to pump the water from the water storage module to the heating module, which is used to heat the water. The second motor pump is used to pump the water output from the heating module back to the heat storage module.

[0055] Taking the example of the water temperature output by the heating module not meeting the requirements, the water dispenser is explained exemplarily. When water is needed, the first motor pump draws water from the storage module to the heating module, where it is heated. If the water temperature output by the heating module does not meet the requirements, the second motor pump draws the water from the heating module back to the heat storage module, and the water dispenser stops dispensing water. The first motor pump then draws water from the heat storage module back to the heating module for heating, and this cycle continues until the water temperature output by the heating module meets the requirements.

[0056] The following is combined with Figure 1 The control process of the water dispenser will be further explained. Figure 2 A flowchart illustrating a control method for a water dispenser, provided as an exemplary embodiment of this disclosure, is included. The control method for the water dispenser comprises the following steps:

[0057] S21. In response to the temperature at the outlet of the heating module being greater than the temperature threshold, control the second motor pump to run, so as to pump the water output by the heating module back to the water storage module.

[0058] The temperature threshold can be set according to the actual situation. The temperature threshold is determined based on the local boiling point and is generally slightly lower than the boiling point. For example, when the local boiling point is 100℃, the temperature threshold is set to 98℃.

[0059] The water dispenser in this embodiment can also be a water purifier and heater, the heating module can be a heating element, the water storage module can be a pressure buffer, and the water outlet of the water dispenser can be a faucet.

[0060] When the temperature at the outlet of the heating module exceeds the temperature threshold, it indicates that the temperature is too high and exceeds the maximum protection temperature. At this time, the water dispenser may produce steam spraying. The second motor pump is controlled to run to perform backflow and depressurization, drawing the water from the outlet of the heating module back to the water storage module. The temperature at the outlet of the heating module is continuously monitored, and the flow rate of backflow at the outlet of the heating module is increased by 50ml / min to 100ml / min every 0.1 seconds until the temperature is lower than the maximum protection temperature, at which point the second motor pump stops.

[0061] When the temperature at the outlet of the heating module exceeds the temperature threshold, it indicates that the temperature is too high. Due to factors such as the thermal inertia of the heating element and deviations in the motor pump flow rate, the outlet water temperature of the heating module is prone to overheating. At this time, steam spraying is extremely likely to occur, and the steam spraying cannot be stopped immediately. That is, because the water temperature inside the heating module is too high, the water will vaporize after heating, forming a large amount of gas at the outlet of the heating module. This causes the outlet to become blocked, resulting in an increase in local pressure at the outlet of the heating module. Consequently, the water outlet of the storage module is pressurized, the flow rate through the heating module decreases, and the temperature of the water inside the heating module will become even higher or continue to rise, generating more steam spraying, and the outlet is more prone to becoming blocked.

[0062] In this embodiment, when the temperature at the outlet of the heating module exceeds the temperature threshold, the second motor pump is controlled to operate, performing back-pull and pressure relief to draw the water output from the heating module back to the water storage module. When the second motor pump performs the back-pull operation, the water pressure in the water dispenser pipeline increases, which helps to dissolve the previously released gas back into the liquid, preventing the formation of pressure buildup and thus reducing the formation of steam spray. This provides anti-steam protection for the heating module, ensuring that the flow rate through the heating module reaches a normal value, thereby quickly restoring the temperature at the outlet of the heating module to the set outlet temperature, achieving rapid temperature stabilization, and preventing sudden changes in water temperature.

[0063] In one embodiment, the heating module employs a PID control algorithm, which, combined with a strategy of controlling the second motor pump to operate when the temperature at the outlet of the heating module exceeds a temperature threshold, ensures that the hot water output by the water dispenser is at a stable temperature that meets user needs.

[0064] like Figure 3 As shown, in one embodiment, S21', in response to the temperature at the outlet of the heating module being greater than the set outlet temperature and the temperature rise rate being greater than the speed threshold, the second motor pump is controlled to run to pump the water output by the heating module back to the water storage module.

[0065] The temperature threshold should not be less than the set outlet water temperature. The temperature threshold can be set according to the actual situation and is determined based on the local boiling point, generally slightly lower than the boiling point. For example, if the set outlet water temperature is 95℃ and the local boiling point is 100℃, the temperature threshold is 98℃.

[0066] The system monitors the temperature at the outlet of the heating module. If the temperature exceeds the set outlet temperature and continues to rise rapidly, indicating that the temperature is not yet stable, the second motor pump is activated for protection. The flow rate of the backflow is increased by 50ml / min to 100ml / min every 0.1 seconds until the temperature begins to decrease, at which point the second motor pump stops. The temperature difference threshold can be set according to actual conditions, for example, 0.5℃ to 2℃.

[0067] In one embodiment, S21' includes:

[0068] In response to the temperature at the outlet of the heating module being greater than the set outlet temperature, and the temperature rise being greater than the temperature rise threshold at least twice within a preset time period, the second motor pump is controlled to operate.

[0069] The preset duration can be set according to the actual situation, for example, 0.1 seconds; the temperature rise threshold can be set according to the actual situation, generally between 0.5℃ and 2℃, for example, 1℃.

[0070] When the temperature at the outlet of the heating module is higher than the set outlet water temperature, and the temperature rise is greater than the temperature rise threshold in at least two consecutive tests (for example, with a preset duration of 0.1 seconds, the temperature at the outlet of the heating module is detected. When the temperature exceeds the set outlet water temperature, and the temperature at the outlet of the heating module is in an upward state in two consecutive tests, and the temperature rise is greater than 1℃ in each preset duration, it indicates that the temperature is continuously rising and has not reached stability. Then, the second motor pump is activated for protection, and the water output from the heating module is pumped back to the water storage module to protect the heating module from steam spraying. This enables rapid gas accumulation, greatly eliminates steam spraying, and prevents sudden changes in water temperature.

[0071] like Figure 4 As shown, in one embodiment, S21”, in response to the temperature at the outlet of the heating module being greater than the temperature threshold and the temperature rise rate being greater than the speed threshold, the second motor pump is controlled to run to pump the water output by the heating module back to the water storage module.

[0072] When the temperature at the outlet of the heating module exceeds the temperature threshold and the rate of temperature rise exceeds the speed threshold, the second motor pump is started to operate. This provides anti-steam protection when the heating module temperature is too high, enabling rapid gas accumulation, greatly eliminating steam spraying, and quickly restoring the temperature at the outlet of the heating module to the set outlet temperature, thus achieving rapid temperature stabilization and preventing sudden changes in water temperature.

[0073] In one embodiment, controlling the operation of the second motor pump includes: adjusting the operating speed of the second motor pump.

[0074] Among them, the rotational speed of the second motor pump is positively correlated with the rate of temperature rise.

[0075] When the temperature rises rapidly, it indicates that the speed of the second motor pump needs to be adjusted to reach a faster speed in order to pump more water output from the outlet of the heating module back to the water storage module, thereby achieving a rapid cooling effect.

[0076] In one embodiment, controlling the operation of the second motor pump includes: adjusting the operating speed of the second motor pump.

[0077] The rotational speed of the second motor pump is positively correlated with the heating power of the heating module.

[0078] When the heating power of the heating module is large, it means that the temperature rise rate is fast. It is necessary to adjust the speed of the second motor pump to reach a faster speed so that more water output from the outlet of the heating module can be pumped back to the water storage module to achieve a rapid cooling effect.

[0079] In one embodiment, controlling the operation of the second motor pump includes: adjusting the operating speed of the second motor pump.

[0080] The rotational speed of the second motor pump is positively correlated with the first temperature difference, which is the difference between the temperature at the outlet of the heating module and the set outlet water temperature.

[0081] When the first temperature difference is large, it means that the temperature at the outlet of the heating module is much higher than the set outlet temperature. It is necessary to adjust the speed of the second motor pump to a faster speed so that more of the water output from the outlet of the heating module can be pumped back to the water storage module to achieve a rapid cooling effect.

[0082] In one embodiment, controlling the operation of the second motor pump includes: adjusting the power of the second motor pump.

[0083] Among them, the power of the second motor pump is positively correlated with the rate of temperature rise.

[0084] When the temperature rises rapidly, it indicates that the power of the second motor pump needs to be adjusted to a higher level to pump more water from the outlet of the heating module back to the storage module, thereby achieving a rapid cooling effect.

[0085] In one embodiment, controlling the operation of the second motor pump includes: adjusting the power of the second motor pump.

[0086] The power of the second motor pump is positively correlated with the heating power of the heating module.

[0087] When the heating power of the heating module is large, it means that the temperature rise rate is fast. It is necessary to adjust the power of the second motor pump to achieve a larger power so that more water output from the outlet of the heating module can be pumped back to the water storage module to achieve a rapid cooling effect.

[0088] In one embodiment, controlling the operation of the second motor pump includes: adjusting the power of the second motor pump.

[0089] The power of the second motor pump is positively correlated with the first temperature difference, which is the difference between the temperature at the outlet of the heating module and the set outlet water temperature.

[0090] When the first temperature difference is large, it means that the temperature at the outlet of the heating module is much higher than the set outlet temperature. It is necessary to adjust the power of the second motor pump to a higher power to pump more water output from the outlet of the heating module back to the water storage module to achieve a rapid cooling effect.

[0091] S22. Control the first motor pump to run so that water from the water storage module is discharged to the heating module.

[0092] After the second electric pump pumps water back to the water storage module, the first electric pump pumps water from the water storage module to the heating module for heating. In one embodiment, after S22, the method further includes: controlling the second electric pump to stop operating in response to the temperature at the outlet of the heating module being not less than the set outlet temperature and not greater than a temperature threshold.

[0093] When the temperature at the outlet of the heating module is not lower than the set outlet temperature and not higher than the temperature threshold, it means that the temperature at the outlet of the heating module has reached the set outlet temperature requirement and there will be no steam spraying or other phenomena, indicating that it is in a safe state. At this time, the second motor pump can be controlled to stop running, thereby stopping the pumping of water output from the heating module back to the water storage module, reducing energy consumption and achieving energy saving.

[0094] During the adjustment of the second motor pump's operating speed, the first motor pump maintains its original control parameters, i.e., maintains its original flow output. This prevents sudden changes in flow rate, avoids sudden increases or decreases in hot water causing the temperature to rise faster, and maintains the original flow rate as much as possible, thereby improving the user experience.

[0095] S23. In response to the temperature at the outlet of the heating module falling within the range of the set outlet water temperature and temperature threshold, and the temperature rise rate not exceeding the speed threshold, control the water dispenser to dispense water.

[0096] When the temperature at the outlet of the heating module falls within the range of the set outlet temperature and the temperature threshold, and the temperature rise rate does not exceed the rate threshold, it indicates that the water temperature at the outlet of the heating module has reached the set outlet temperature, and there will be no steam spraying or other phenomena, thus the water outlet of the water dispenser can be controlled. In one embodiment, such as Figure 5 As shown, the control method also includes:

[0097] S51. In response to the temperature at the inlet of the heating module being lower than the set outlet temperature, the first flow rate of the water flowing through the heating module is determined based on the quotient of the first parameter and the second parameter.

[0098] The first parameter is the product of the heating power of the heating module and the unit time, and the second parameter is the product of the specific heat capacity of water and the second temperature difference, where the second temperature difference is the difference between the temperature at the water inlet of the heating module and the set water outlet temperature.

[0099] S52. Based on the correspondence between flow rate and control parameters, determine the first control parameter corresponding to the first flow rate.

[0100] S53. Control the first motor pump to operate with the first control parameters so that water from the water storage module is discharged to the heating module.

[0101] The first control parameters include, but are not limited to, the operating voltage, operating power, and operating speed of the first motor pump.

[0102] In the early stage of heating by the heating module, the water inside the heating module is at a low temperature and has not reached the set outlet water temperature. When the temperature at the outlet of the heating module is lower than the set outlet water temperature, it indicates that the water needs to be heated. The first motor pump is controlled to operate with the first control parameters, so that water from the storage module is discharged to the heating module for heating. The control parameters of the first motor pump are determined based on the temperature at the inlet of the heating module and the flow rate of the water flowing through the heating module, which effectively improves the accuracy of temperature control and avoids the problem of excessive flow and rapid water temperature drop due to excessive power of the first motor pump.

[0103] After setting the outlet water temperature, the first flow rate is calculated based on the temperature detected at the inlet of the heating module. The formula for calculating the first flow rate is W = P * t = C * F * ΔT, where W is the work, P is the heating power of the heating module, t is the unit time (i.e., the timing time for the flow rate is 1 minute), C is the specific heat capacity of water (4200), F is the flow rate, and ΔT is the second temperature difference, which is the difference between the temperature at the inlet of the heating module and the set outlet water temperature. For example, if the power of the heating module is 2100W, and the temperature is raised from 25℃ to 95℃, the formula for calculating the first flow rate is: F1 = P * t / (C * ΔT) = 2100 * 60 / (4200 * 70) = 0.428 L / min, where F1 is the first flow rate. The first flow rate is compared with the data preset by the first motor pump. The preset data is, for example, the correspondence between flow rate and control parameters. The first control parameter corresponding to the first flow rate is determined, and the first motor pump is started so that the water storage module outputs the corresponding flow rate. At the same time, the heating module is started to heat the water.

[0104] In one embodiment, such as Figure 6 As shown, the control method also includes:

[0105] S61. In response to the temperature at the outlet of the heating module being lower than the set outlet temperature, control the second motor pump to run, so as to pump the water output from the heating module back to the water storage module.

[0106] S62. In response to the heating power of the heating module being not less than the rated power, determine the second flow rate flowing through the heating module based on the quotient of the third parameter and the fourth parameter; determine the second control parameter corresponding to the second flow rate based on the correspondence between the flow rate and the control parameter; and control the first motor pump to operate with the second control parameter.

[0107] The third parameter is the product of the heating power of the heating module and the unit time, and the fourth parameter is the product of the specific heat capacity of water and the third temperature difference, which is the difference between the temperature at the water inlet of the heating module and the set water outlet temperature.

[0108] S63. In response to the heating power of the heating module being less than the rated power, the heating power of the heating module is adjusted based on the PID algorithm.

[0109] The second motor pump provided in this embodiment includes multiple start-up scenarios. In addition to the scenarios mentioned above, such as the temperature at the outlet of the heating module being greater than the temperature threshold and the temperature rise rate being greater than the speed threshold, the start-up scenarios of the second motor pump also include when the heating module starts up, the water in the heating module is at a low temperature and has not reached the set outlet water temperature. In this case, the second motor pump is started to pump the water at the outlet of the heating module back to the water storage module, and then the water from the water storage module is discharged to the heating module for heating until the temperature reaches the set outlet water temperature.

[0110] In step S61, since the water in the heating module is at a low temperature when it first starts heating and has not reached the set outlet temperature, the temperature at the outlet of the heating module is detected. For example, if the set outlet temperature is 95℃, and the detected water temperature at the outlet is lower than 95℃, the second motor pump is directly started to pump the water from the heating module back to the storage module, and the outlet temperature is set to 95℃ for heating. At this time, the heating flow rate is relatively small, and the flow rate of the first motor pump is: F2=P*t / (C*△T)=2100*60 / (4200*70)=0.428L / min, F2 is the flow rate of the first motor pump, P is the pumping speed. The heating power of the heating module is given by t, which is the unit time (i.e., the timing time for the flow rate, 1 minute), C is the specific heat capacity of water (4200), and ΔT is the temperature difference between the set outlet water temperature and the initial water temperature. The second motor pump is set to pump back water at the same flow rate as the first motor pump after starting. Once the temperature at the outlet of the heating module reaches 95℃, the second motor pump stops pumping water, and the hot water from the heating module flows directly out of the water dispenser's outlet.

[0111] In step S62, as the heating module continuously increases its power to reach its rated power, the temperature at the outlet of the heating module gradually approaches the set outlet water temperature. If the power of the heating module is not less than the rated power, but the temperature at the outlet of the heating module is still lower than the set outlet water temperature, it indicates that the flow rate of the first motor pump is too high, which can easily cause the water to cool down during circulation. In this case, it is necessary to adjust the output flow rate of the first motor pump. The required flow rate reduction for the first motor pump relative to the initial flow rate is determined based on the heating power of the heating module and the unit flow rate time. For example, if the temperature at the inlet of the heating module before heating is 25℃, the set outlet temperature is 95℃, and the current outlet temperature is 90℃, and the rated power of the heating module is, for example, 2100W, then F3=P*t / (C*△T)*k=2100*60 / (4200*(95-25))=0.428L / min, △Flow=F3*r=0.428*((95-90) / (95-25))=0.03L / min, where F3 is the current flow rate of the first motor pump / initial flow rate; △Flow is the deviation ratio, i.e., the required flow rate reduction relative to the initial flow rate. The above calculation formula indicates that the initial flow rate of the first motor pump is 0.428L / min, and the reduced second flow rate is 0.428-0.03=0.398L / min. P is the heating power of the heating module; t is the unit time, i.e., the timing time for the flow rate is 1 minute; C is the specific heat capacity of water, 4200; △T is the temperature difference between the set outlet water temperature and the initial water temperature; k and r are both proportional coefficients, k is the temperature difference between the set outlet water temperature and the initial water temperature, and r is the quotient between the temperature difference between the set outlet water temperature and the temperature at the outlet of the heating module and the temperature difference between the set outlet water temperature and the initial water temperature. Based on the correspondence between the flow rate and the control parameters, the second control parameter corresponding to the second flow rate is determined, and the first motor pump is controlled to operate with the second control parameter.

[0112] In one embodiment, the heating module can heat at its rated power, such as 2100W, or it can be started using a PID (Proportional-Integral-Derivative) control algorithm to gradually increase the power of the heating module until it reaches its rated power. For example, after starting the heating module, the temperature at the outlet of the heating module is detected, and the heating module is started according to the PID control algorithm until the rated power of the heating module is reached, such as 2100W. The PID calculation formula is P1=U1(t)=Kp1*e(t)+Ki1*Σe(t)+Kd1*(e(t)-e(t-1)), where e(t) is the current error e(t)=△T=Tset–NTC2, e(t-1) is the previous error, P1 is the heating power of the heating module, Tset is the set outlet water temperature, NTC2 is the temperature at the outlet of the heating module, and Kp1, Ki1, and Kd1 are all PID system parameters, which can be set empirically according to the situation. The output data is the heating power of the heating module.

[0113] By detecting the temperature at the outlet of the heating module, it can be determined whether the second motor pump is turned on, which can effectively ensure that hot water at the set outlet temperature is output, improve the accuracy of water dispenser temperature control, and enhance user experience.

[0114] The following is combined with Figure 7 The control method for the water dispenser will be further explained below:

[0115] After setting the outlet water temperature, the flow rate is calculated by detecting the temperature at the inlet of the heating module. For example, for a 2100W heating module, raising the outlet temperature from 25℃ to 95℃, the flow rate is calculated as: F4 = P*t / (C*△T) = 2100*60 / (4200*70) = 0.428L / min, where P is the heating power of the heating module, t is the unit time (i.e., the timing time for the flow rate is 1 minute), C is the specific heat capacity of water (4200), F4 is the initial flow rate of the first motor pump, and △T is the temperature difference between the set outlet water temperature and the initial water temperature. The time it takes for water to flow through the heating module is determined based on the calculated flow rate. For example, if the calculated flow rate is F4 = 0.428L / min and the internal space of the heating module is V = 25ml, the time it takes for water to flow through the heating module is t1 = V*60 / F = 25*60 / 428 = 3.5s.

[0116] The calculated flow rate is compared with the pre-set data of the first motor pump. The pre-set data is, for example, the correspondence between flow rate and control parameters. The control parameters include, but are not limited to, the voltage, power, and speed of the motor pump. The first motor pump is started to output the corresponding flow rate, and the heating module is started to heat the water. After the heating module starts heating, the temperature at the outlet of the heating module is detected. The heating module is started to heat the water according to the PID (proportional-integral-derivative) control algorithm until the rated power of the heating module is reached, for example, 2100W. The PID calculation formula is P1=U1(t)=Kp1*e(t)+Ki1*Σe(t)+Kd1*(e(t)-e(t-1)), where e(t) is the current error e(t)=△T=Tset–NTC2, e(t-1) is the previous error, P1 is the heating power of the heating module, Tset is the set outlet water temperature, NTC2 is the temperature at the outlet of the heating module, Kp1, Ki1, and Kd1 are all PID system parameters, which can be set empirically according to the situation, and the output data is the heating power of the heating module.

[0117] When the heating module first starts heating, the water inside is at a low temperature and has not reached the set outlet temperature. The system detects the temperature at the outlet of the heating module. For example, if the set outlet temperature is 95℃, and the detected temperature at the outlet is below 95℃, the second motor pump is activated to pump the water back to the storage module. For instance, if the heating is set to 95℃, the flow rate of the first motor pump is: F4 = P*t / (C*△T) = 2100*60 / (4200*70) = 0.428 L / min. The second motor pump is set to pump back at the same flow rate as the first motor pump after startup. Once the temperature at the outlet of the heating module reaches 95℃, the second motor pump stops pumping water, and the hot water from the heating module flows directly to the water dispenser's outlet.

[0118] When the temperature at the outlet of the heating module is lower than the set outlet temperature, and the power of the heating module is not less than the rated power (e.g., 2100W), it indicates that the flow rate of the first motor pump is too high, which can easily cause the water to cool down during circulation. In this case, the output flow rate of the first motor pump needs to be adjusted. The required flow reduction of the first motor pump relative to the initial flow rate is determined based on the heating power of the heating module and the unit flow rate time. For example, if the initial temperature before heating is 25℃, the set outlet water temperature is 95℃, and the current temperature is 90℃, then F5=P*t / (C*△T)*k=2100*60 / (4200*(95-25))=0.428L / min, △Flow=F5*r=0.428**((95-90) / (95-25))=0.03L / min, where k and r are proportional coefficients. k is the temperature difference between the set outlet water temperature and the initial water temperature, and r is the quotient between the temperature difference between the set outlet water temperature and the current temperature and the temperature difference between the set outlet water temperature and the initial water temperature. The initial flow rate of the first motor pump is 0.428L / min, and the reduced flow rate is 0.398L / min. Based on the correspondence between flow rate and control parameters, the control parameters corresponding to the flow rate are determined, and the first motor pump is controlled to operate according to the control parameters.

[0119] After the heating module heats the water, if the set outlet water temperature is too high, such as 95℃, the outlet water temperature of the heating module is prone to overheating due to factors such as the thermal inertia of the heating module and the deviation of the motor pump flow. At this time, steam spraying is very likely to occur, and the steam spraying cannot be stopped immediately. At this time, the second motor pump is used to pump water or air to prevent steam spraying and temperature instability.

[0120] Under normal PID control, if the set outlet water temperature is 95℃, it generally fluctuates around 95℃. However, if the temperature exceeds the maximum set temperature, such as 98℃, and continues to rise rapidly (for example, with a detection cycle of 0.1 seconds, monitoring the temperature at the outlet of the heating module), and after exceeding the set outlet temperature, two consecutive temperature readings show an increase, with each cycle's temperature rise exceeding the temperature rise threshold, indicating a continuous and unstable temperature increase, the second motor pump is activated for protection. The backflow rate is increased by 50ml / min to 100ml / min every 0.1 seconds. The specific increase in backflow rate is calculated based on heating power, flow rate, etc., and is based on factors such as the initial temperature of the water in the storage module before heating. The set outlet water temperature is 95℃, the maximum protection temperature is 98℃, and the current temperature is 99℃. Therefore, F6 = P*t / (C*△T)*k = 2100*60 / (4200*(95-25)) = 0.428 L / min, △Flow = F6*r = 0.428*((99-95) / (95-25)) = 0.024 L / min. Here, t is the flow rate timing time (1 minute), C is the specific heat capacity of water (4200), △T is the temperature difference between the set outlet water temperature and the initial water temperature, and k and r are proportionality coefficients. k is the temperature difference between the set outlet water temperature and the initial water temperature, and r is the quotient between the temperature difference between the current temperature and the set outlet water temperature and the temperature difference between the set outlet water temperature and the initial water temperature. The second motor pump stops when the temperature begins to drop. The temperature rise threshold can be set according to the actual situation, for example, 0.5℃~2℃.

[0121] By detecting the temperature at the outlet of the heating module, it can determine whether to start the second motor pump, which can effectively control the hot water outlet temperature. It also has anti-steam protection to prevent the outlet water temperature from becoming too high and can quickly restore the outlet water temperature to prevent sudden changes in water temperature.

[0122] like Figure 8As shown in the figure, this disclosure also provides a water dispenser, including a water storage module 11, a heating module 13, a first motor pump 12, a first temperature detection module 87, a second temperature detection module 86, and a controller. The controller is used to implement the above control method. The water storage module 11 is used to store water, and the heating module 13 is used to heat the water output from the water storage module 11. The first temperature detection module 87 is located at the water inlet of the heating module 13 and is used to detect the temperature at the water inlet of the heating module 13. The second temperature detection module 86 is located at the water outlet of the heating module 13 and is used to detect the temperature at the water outlet of the heating module 13. One end of the first motor pump 12 is connected to the water outlet of the water storage module 11, and the other end is connected to the water inlet of the heating module 13. The first motor pump 12 is used to pump the water from the water storage module 11 to the heating module 13. One end of the second motor pump 14 is connected to the water outlet of the heating module 13, and the other end is connected to the water inlet of the water storage module 11. The second motor pump 14 is used to pump the water output from the heating module 13 back to the water storage module 11. The first temperature detection module 87 can be a temperature sensor, and the second temperature detection module 86 can be a temperature sensor.

[0123] If the water temperature output by the heating module does not meet the requirements, the second motor pump will pump the water output by the heating module back to the heat storage module, and the cycle will continue until the water temperature output by the heating module meets the requirements. Through the cooperation of the two motor pumps, the low-temperature water in the pipeline is returned, which avoids the problem of the water dispenser having a low water temperature for the first cup.

[0124] In one embodiment, a one-way valve is included between the heating module and the water outlet of the water dispenser.

[0125] The one-way valve prevents room temperature water from entering the heating module and also prevents air from the water dispenser outlet from entering the heating module. Due to the presence of the one-way valve, air and room temperature water at the water dispenser outlet cannot flow back. Therefore, when the second motor pump starts, the water at the heating module outlet is drawn into the water storage module by the second motor pump, so that the water heated by the heating module is drawn back into the water storage module. When the second motor pump stops pumping water, the hot water from the heating module is directly discharged to the water dispenser outlet through the one-way valve.

[0126] In one embodiment, the water dispenser includes a composite filter element 82 and a nanofiltration membrane filter element 83, which are disposed between the water storage module 11 and the water inlet of the water dispenser. Through pressurization by the booster pump 84 and filtration by the filter elements, the filtered water is sterilized by an ultraviolet sterilizer to form purified water.

[0127] The following is combined with Figure 8 Further explanation of the water dispenser:

[0128] The water dispenser receives water through the inlet valve 81 and filters it through a composite filter element 82 and a nanofiltration membrane filter element 83. A booster pump 84 facilitates water flow between the composite filter element 82 and the nanofiltration membrane filter element 83. The filtered water is then sterilized by an ultraviolet sterilizer 85 to become purified water, which is then stored in the water storage module 11. When water is needed, the water storage module 11 uses a first motor pump 12 to pump water to the heating module 13. A first temperature detection module 87 detects the temperature at the inlet of the heating module 13, and a second temperature detection module 86 detects the temperature at the outlet of the heating module 13. If the temperature at the outlet of the heating module 13 does not meet the set water temperature, a second motor pump 14 starts, pumping the water from the heating module 13 back to the water storage module 11. The first motor pump then pumps water from the water storage module back to the heating module for heating, repeating this cycle until the water temperature output by the heating module meets the requirements. The heating module then dispenses the water from the water dispenser's faucet.

[0129] Figure 9 This is a schematic diagram of the structure of an electronic device according to an example embodiment of the present disclosure. The electronic device includes a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the computer program, it implements the control method described in any of the above embodiments. Figure 9 The electronic device 90 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0130] like Figure 9 As shown, the electronic device 90 can be manifested as a general-purpose computing device, such as a server device. The components of the electronic device 90 may include, but are not limited to: at least one processor 91, at least one memory 92, and a bus 93 connecting different system components (including memory 92 and processor 91).

[0131] Bus 93 includes a data bus, an address bus, and a control bus.

[0132] The memory 92 may include volatile memory, such as random access memory (RAM) 921 and / or cache memory 922, and may further include read-only memory (ROM) 923.

[0133] The memory 92 may also include a program tool 925 (or utility) having a set (at least one) program module 924, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0134] The processor 91 executes various functional applications and data processing, such as the control methods provided in any of the above embodiments, by running computer programs stored in the memory 92.

[0135] Electronic device 90 can also communicate with one or more external devices 94 (e.g., keyboard, pointing device, etc.). This communication can be performed through input / output (I / O) interface 95. Furthermore, electronic device 90 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public network, such as the Internet) via network adapter 96. As shown, network adapter 96 communicates with other modules of electronic device 90 via bus 93. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with electronic device 90, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0136] It should be noted that although several units / modules or sub-units / modules of the electronic device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0137] This disclosure also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the control method provided in any of the above embodiments.

[0138] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.

[0139] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements any of the control methods described above.

[0140] The program code for executing the computer program product of this disclosure can be written in any combination of one or more programming languages, and the program code can be executed entirely on a user device, partially on a user device, as a stand-alone software package, partially on a user device and partially on a remote device, or entirely on a remote device.

[0141] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A control method for a water dispenser, characterized in that, The water dispenser includes a water storage module, a heating module, a first motor pump, and a second motor pump. The two ends of the first motor pump are respectively connected to the water outlet of the water storage module and the water inlet of the heating module. The two ends of the second motor pump are respectively connected to the water outlet of the heating module and the water inlet of the water storage module. The control method includes: In response to the temperature at the outlet of the heating module being greater than a temperature threshold, and / or in response to the temperature at the outlet of the heating module being greater than a set outlet water temperature and the temperature rise rate being greater than a speed threshold, the second motor pump is controlled to operate to pump the water output by the heating module back to the water storage module; the temperature threshold is not less than the set outlet water temperature; Control the first motor pump to operate so that water is discharged from the water storage module to the heating module; In response to the temperature at the outlet of the heating module falling within the range of the set outlet water temperature and the temperature threshold, and the temperature rise rate not exceeding the speed threshold, the water dispenser is controlled to dispense water. The step of controlling the second motor pump to operate in response to the temperature at the outlet of the heating module being greater than the set outlet temperature and the temperature rise rate being greater than the speed threshold includes: In response to the temperature at the outlet of the heating module being greater than the set outlet water temperature, and the temperature rise being greater than the temperature rise threshold at least twice within a preset time period, the operating speed of the second motor pump is adjusted; wherein, the operating speed of the second motor pump is positively correlated with the temperature rise rate, and / or the operating speed of the second motor pump is positively correlated with the heating power of the heating module, and / or the operating speed of the second motor pump is positively correlated with a first temperature difference; the first temperature difference is the difference between the temperature at the outlet of the heating module and the set outlet water temperature; And / or, adjust the power of the second motor pump; the power of the second motor pump is positively correlated with the temperature rise rate, and / or the power of the second motor pump is positively correlated with the heating power of the heating module, and / or the power of the second motor pump is positively correlated with the first temperature difference.

2. The control method as described in claim 1, characterized in that, After controlling the first motor pump to operate so that water is discharged from the water storage module to the heating module, the method further includes: In response to the temperature at the outlet of the heating module being not less than the set outlet temperature and not greater than the temperature threshold, the second motor pump is controlled to stop running.

3. The control method as described in claim 1, characterized in that, The control method further includes: In response to the temperature at the inlet of the heating module being lower than the set outlet water temperature, a first flow rate of water flowing through the heating module is determined based on the quotient of a first parameter and a second parameter; the first parameter is the product of the heating power of the heating module and the unit time, and the second parameter is the product of the specific heat capacity of water and the second temperature difference, where the second temperature difference is the difference between the temperature at the inlet of the heating module and the set outlet water temperature. Based on the correspondence between flow rate and control parameters, determine the first control parameter corresponding to the first flow rate; The first motor pump is controlled to operate with the first control parameters so that water is discharged from the water storage module to the heating module.

4. The control method as described in claim 1, characterized in that, The control method further includes: In response to the temperature at the outlet of the heating module being lower than the set outlet temperature, the second motor pump is controlled to run to pump the water output from the heating module back to the water storage module. In response to the heating power of the heating module being not less than the rated power, a second flow rate flowing through the heating module is determined based on the quotient of the third parameter and the fourth parameter; a second control parameter corresponding to the second flow rate is determined based on the correspondence between the flow rate and the control parameter; the first motor pump is controlled to operate with the second control parameter; the third parameter is the product of the heating power of the heating module and the unit time, the fourth parameter is the product of the specific heat capacity of water and the third temperature difference, and the third temperature difference is the difference between the temperature at the water inlet of the heating module and the set outlet water temperature; In response to the heating power of the heating module being less than the rated power, the heating power of the heating module is adjusted based on a PID algorithm.

5. A water dispenser, characterized in that, The water dispenser includes a water storage module, a heating module, a first motor pump, a first temperature detection module, a second temperature detection module, and a controller; Water storage module, used to store water; A heating module is used to heat the water output from the water storage module; The first motor pump has one end connected to the outlet of the water storage module and the other end connected to the inlet of the heating module. The second motor pump is connected at one end to the outlet of the heating module and at the other end to the inlet of the water storage module. The controller is electrically connected to the first motor pump, the second motor pump, the first temperature detection module, and the second temperature detection module, respectively; the controller is used to implement the control method according to any one of claims 1-4.

6. The water dispenser as described in claim 5, characterized in that, A one-way valve is provided between the heating module and the water outlet of the water dispenser; And / or, The water dispenser includes a composite filter element and a nanofiltration membrane filter element, which are disposed between the water storage module and the water inlet of the water dispenser.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and for running on the processor, characterized in that, When the processor executes the computer program, it implements the control method according to any one of claims 1 to 4.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control method according to any one of claims 1 to 4.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method as described in any one of claims 1-4.

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