Control method and device for drinking water purification equipment and drinking water purification equipment

Abstract

The embodiment of the present application provides a control method, device and drinking water purification equipment for drinking water purification equipment, the method is applied to the drinking water purification equipment, the drinking water purification equipment includes a reflux system; the reflux system includes a filter assembly and a booster pump; the water outlet of the booster pump is connected to the water inlet of the filter assembly through a first pipeline, and the water outlet of the filter assembly is connected to the water inlet of the booster pump through a second pipeline; the method includes: when monitoring that the pure water reflux condition is met, obtaining the intermediate speed and target speed of the booster pump, the intermediate speed is less than the target speed; controlling the speed of the booster pump to reach the intermediate speed; controlling the speed of the booster pump to reach the target speed. The technical solution provided by the embodiment of the present application reduces the acceleration during the startup of the booster pump by slowly speeding up, thereby reducing vibration impact, which is conducive to extending the service life of the booster pump.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and more specifically, to a control method and device for purifying drinking water equipment and the purifying drinking water equipment. Background Art

[0002] Currently, more and more people use drinking water purification equipment in the hope of obtaining clean and hygienic drinking water.

[0003] In the related art, the drinking water purification equipment provides a pure water reflux mode, that is, by starting the booster pump, the pure water obtained after filtering the reverse osmosis filter element is returned to the above-mentioned reverse osmosis filter element through the reflux pipe to replace the stale water in the reverse osmosis filter element with stale water.

[0004] However, in the pure water reflux mode, there is no water intake at the rear end of the reverse osmosis filter element, the membrane front pressure of the reverse osmosis filter element increases, and the load of the booster pump also increases. Therefore, starting the booster pump will cause greater vibration, shortening the service life of the booster pump. Summary of the Invention

[0005] The embodiments of the present application provide a control method and device for a drinking water purification device, and the drinking water purification device.

[0006] In a first aspect, an embodiment of the present application provides a control method for a pure drinking water device, which is applied to the pure drinking water device, the pure drinking water device including a reflux system; the reflux system including a filter assembly and a booster pump; the water outlet end of the booster pump is connected to the water inlet end of the filter assembly through a first pipeline, and the water outlet end of the filter assembly is connected to the water inlet end of the booster pump through a second pipeline; the method includes: when monitoring that the pure water reflux conditions are met, obtaining the intermediate speed of the booster pump, and obtaining the target speed of the booster pump, the intermediate speed of the booster pump is obtained to be less than the target speed; controlling the speed of the booster pump to reach the intermediate speed; controlling the speed of the booster pump to reach the target speed, so that the stale water in the filter assembly is replaced with pure water after at least two rounds of reflux.

[0007] In a second aspect, an embodiment of the present application provides a control device for a pure drinking water equipment, which is applied to the pure drinking water equipment, and the pure drinking water equipment includes a reflux system; the reflux system includes a filter assembly and a booster pump; the water outlet end of the booster pump is connected to the water inlet end of the filter assembly through a first pipe, and the water outlet end of the filter assembly is connected to the water inlet end of the booster pump through a second pipe; the device includes: a speed acquisition module, which is used to obtain the intermediate speed of the booster pump when it is monitored that the pure water reflux conditions are met, and to obtain the target speed of the booster pump, and the intermediate speed of the booster pump is less than the target speed; a first control module, which is used to control the speed of the booster pump to reach the intermediate speed; and a second control module, which is used to control the speed of the booster pump to reach the target speed, so that the stale water in the filter assembly is replaced with pure water after at least two rounds of reflux.

[0008] In a third aspect, an embodiment of the present application provides a drinking water purification device, which includes: a processor; a memory; a reflux system; the memory stores computer program instructions, and the computer program instructions are called by the processor to execute the control method of the drinking water purification device as described in the first aspect.

[0009] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a program code is stored. The program code is called by a processor to execute the control method of the drinking water purification device as described in the first aspect.

[0010] An embodiment of the present application provides a control scheme for a pure drinking water device. When monitoring that the pure water reflux conditions are met, an intermediate speed and a target speed are obtained, and the booster pump is first controlled to increase in speed to the intermediate speed, and then the booster pump is controlled to increase in speed from the intermediate speed to the target speed, rather than controlling the booster pump to directly increase in speed to the target speed. By slowly increasing the speed, the acceleration of the booster pump during startup is reduced, thereby reducing vibration impact, which is beneficial to extending the service life of the booster pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 This is a schematic diagram of the drinking water purification equipment provided in an embodiment of the present application.

[0013] Figure 2 This is a water path diagram of the drinking water purification equipment provided in the embodiment of the present application in the water production mode.

[0014] Figure 3 This is a water path diagram of the drinking water purification equipment provided in the embodiment of the present application in the pure water reflux mode.

[0015] Figure 4 This is a flow chart of a control method for a drinking water purification device provided in an embodiment of the present application.

[0016] Figure 5 This is a flow chart of another control method for drinking water purification equipment provided in an embodiment of the present application.

[0017] Figure 6 This is a flow chart of another control method for drinking water purification equipment provided in an embodiment of the present application.

[0018] Figure 7 This is a block diagram of a control device for a drinking water purification device provided in an embodiment of the present application.

[0019] Figure 8 This is a structural block diagram of a drinking water purification device provided in an embodiment of the present application.

[0020] Figure 9 This is a structural block diagram of the computer-readable storage medium provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0022] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0023] Figure 1 This is a schematic diagram of a drinking water purification device 100 provided in an embodiment of the present application. The drinking water purification device 100 comprises a housing 1, a reflux system 2, and a power module 3. The reflux system 2 includes a booster pump 11 and a filter assembly 12. The water outlet of the booster pump 11 is connected to the water inlet of the filter assembly 12 via a first pipeline, while the water outlet of the filter assembly 12 is connected to the water inlet of the booster pump 11 via a second pipeline.

[0024] The booster pump 11 increases the water pressure to allow water to flow into or out of the pipelines (including the water inlet pipeline, the water intake pipeline, the first pipeline, the second pipeline, etc.). The filter assembly 12 is used to filter impurities in the water, such as suspended matter, bacteria, pesticide residues, or heavy metals. In the embodiment of the present application, the filter assembly 12 includes at least two reverse osmosis (RO) filter cartridges, which can be connected in series or in parallel.

[0025] In an embodiment of the present application, the power module 3 is electrically connected to the boost pump 11 to provide power for the boost pump 11. The rotational speed of the boost pump 11 is related to the output voltage and operating frequency of the power module 3. When the operating frequency of the power module 3 is constant, the output voltage of the power module 3 is positively correlated with the rotational speed of the boost pump 11, that is, the greater the output voltage of the power module 3, the greater the rotational speed of the boost pump 11. When the operating frequency of the power module 3 is adjustable but the output voltage is constant, the operating frequency of the power module 3 is positively correlated with the rotational speed of the boost pump 11, that is, the greater the operating frequency of the power module 3, the greater the rotational speed of the boost pump 11.

[0026] Based on the above principle, the power module 3 in the pure drinking water equipment 100 can be set as an adjustable voltage power supply, and the output voltage of the power module 3 is adjusted to achieve the speed regulation of the boost pump 11. Optionally, the power module 3 includes a duty cycle regulation submodule, which is used to adjust the duty cycle of the power module 3, thereby achieving the output voltage regulation of the power module 3. Wherein, the duty cycle is a constant between 0 and 1. The output voltage of the power module 3 is the product of the duty cycle and the rated voltage of the power module 3. For example, the rated voltage of the power module 3 is 30V, the duty cycle is 0.2, and the output voltage of the power module 3 is 6V. Optionally, the duty cycle regulation submodule is a pulse width modulation (PWM) control chip, and the PWM control chip corrects the clock waveform of the oscillator by adjusting the combination of the internal oscillator, resistor and capacitor, thereby achieving the regulation of the duty cycle.

[0027] Based on the above principles, the power module 3 in the drinking water purification device 100 can be configured as a frequency-adjustable power supply. By adjusting the operating frequency of the power module 3, the speed of the booster pump 11 can be regulated. Optionally, the power module 3 includes a frequency modulation submodule for adjusting the operating frequency of the power module 3. Optionally, the frequency modulation submodule is a frequency converter, which is composed of a rectifier, filter, inverter, brake unit, drive unit, detection unit, microprocessor unit, etc., and adjusts the operating frequency of the power module 3 by switching on and off the internal IGBT.

[0028] In the embodiment of the present application, the power module 3 can also be electrically connected to other components in the drinking water purification device to provide power to the other components. The above-mentioned other components include but are not limited to: a water inlet solenoid valve, a water outlet solenoid valve, a drain solenoid valve, a reflux valve, etc.

[0029] Figure 2 This is a water path diagram of the drinking water purification device 100 in the water production mode provided by an embodiment of the present application. Figure 2In this embodiment, the filter assembly 12 includes a first reverse osmosis filter element 121 and a second reverse osmosis filter element 122, which are connected in parallel. The water outlet of the booster pump 11 is connected to the water inlet of the first reverse osmosis filter element 121 and the water inlet of the second reverse osmosis filter element 122, respectively. The first common end of the first reverse osmosis filter element 121 and the second reverse osmosis filter element 122 are connected to the water inlet of the booster pump 11.

[0030] exist Figure 2 In this embodiment, the second pipeline is equipped with a return valve 3 and a check valve 4, which are used to control the connection or disconnection of the second pipeline. When both return valve 3 and check valve 4 are open, the second pipeline is connected; when at least one of the return valve 3 and check valve 4 is closed, the second pipeline is disconnected.

[0031] exist Figure 2 In the embodiment, the housing 1 is provided with at least one water outlet. Optionally, the at least one water outlet includes a normal temperature water outlet. The normal temperature water outlet is connected to the water outlet end of the filter assembly 12 via a first water outlet pipe. A water outlet solenoid valve 5 is provided on the first water outlet pipe, which is used to control the connection or disconnection of the first water outlet pipe. Specifically, when the water outlet solenoid valve 5 is opened, the first water outlet pipe is connected, and pure water filtered by the filter assembly 12 flows out of the normal temperature water outlet; when the water outlet solenoid valve 5 is closed, the first water outlet pipe is disconnected.

[0032] exist Figure 2 In the embodiment, the housing 1 is provided with a water inlet, which is connected to the water inlet end of the booster pump through a water inlet pipe. Optionally, the water inlet pipe is provided with a water inlet solenoid valve 6, which is used to control the connection or disconnection of the water inlet pipe. Specifically, when the water inlet solenoid valve 6 is opened, the water inlet pipe is connected, and an external water source (such as water flowing out of a faucet) flows from the water inlet pipe into the booster pump 11, and passes through the booster pump 11 to the bottom filter assembly 12; when the water inlet solenoid valve 6 is closed, the water inlet pipe is disconnected. Optionally, an FPC filter element 7 is provided on the side of the water inlet solenoid valve 6 in the water inlet pipe away from the booster pump 11, which is used to filter solid shells in the water, kill bacteria, filter out harmful chemical components, etc.

[0033] exist Figure 2 In this embodiment, the housing 1 is further provided with a wastewater outlet, which is connected to the water outlet of the filter assembly 12 via a drainage pipeline. A flushing solenoid valve 8 is provided on the drainage pipeline to control the connection and disconnection of the drainage pipeline. When the flushing solenoid valve 8 is open, the drainage pipeline is connected, and wastewater filtered by the filter assembly 12 can flow out of the drainage outlet through the drainage pipeline. When the flushing solenoid valve 8 is closed, the drainage pipeline is disconnected.

[0034] exist Figure 2In this embodiment, the second common end of the first reverse osmosis filter element 121 and the second reverse osmosis filter element 122 is connected to a wastewater outlet via a drainage pipeline. The drainage pipeline includes a first branch connected to the first reverse osmosis filter element 121, a second branch connected to the first reverse osmosis filter element 122, and a main circuit connected to both the first and second branches. The flushing solenoid valve 8 is provided on the main circuit.

[0035] Please refer again Figure 2 In the water purification mode, the water inlet solenoid valve 6, flushing solenoid valve 8, and outlet solenoid valve 5 are all open, and the reflux valve 3 and check valve 4 are closed. External water (e.g., tap water) flows through the water inlet and first pipelines, through the FPC filter element 7, booster pump 11, and filter assembly 12. The pure water filtered by filter assembly 12 flows out of the normal temperature water outlet through the first outlet pipeline. The wastewater filtered by filter assembly 12 flows out of the wastewater outlet through the drain pipeline.

[0036] Figure 3 This is a water path diagram of the drinking water purification equipment provided in the embodiment of the present application in the pure water reflux mode. In the pure water reflux mode of the drinking water purification equipment, the reflux valve 3, the one-way valve 4, the flushing solenoid valve 8, and the water inlet solenoid valve 6 are all open, and the water outlet solenoid valve 5 is closed. On the one hand, the stale water obtained after the filter component 12 filters the tap water flows along the second pipeline and the first pipeline through the booster pump 11 and then returns to the filter component 12. On the other hand, the external water source flows along the water inlet pipeline through the booster pump 11 to reach the filter component 12. The pure water obtained by the filter component 12 from filtering the above-mentioned stale water and the external water source flows along the second pipeline and the first pipeline through the booster pump 11 and then returns to the filter component 12, thereby replacing the stale water in the filter component 12 with pure water. The wastewater obtained by filtering the above-mentioned external water source and stale water by the filter component 12 flows out from the wastewater outlet through the drainage pipeline.

[0037] After long-term research, the inventor found that in the pure water reflux mode, due to the existence of two water flows (external water source and stale water) entering the booster pump, and the water outlet solenoid valve is closed, there is no water intake behavior at the rear end of the filter component, resulting in an increase in the membrane front pressure of the filter component and an increase in the load of the booster pump, which leads to a larger vibration shock and shortens the service life of the booster pump.

[0038] Based on the above problems, the inventor designed a soft start scheme for pure drinking water equipment in pure water reflux mode. When it is monitored that the pure water reflux conditions are met, the intermediate speed and the target speed are obtained. The booster pump is first controlled to increase in speed to the intermediate speed, and then the booster pump is controlled to increase in speed from the intermediate speed to the target speed, instead of controlling the booster pump to directly increase in speed to the target speed. By slowly increasing the speed, the acceleration of the booster pump during startup is reduced, thereby reducing vibration impact, which is beneficial to extending the service life of the booster pump.

[0039] Figure 41 is a flow chart of a control method for a drinking water purification device provided in one embodiment of the present application. The method includes the following steps S401-S403.

[0040] Step S401 : When it is detected that the pure water reflux condition is met, the intermediate speed and target speed of the booster pump are obtained.

[0041] The pure water reflux condition refers to the condition that triggers the pure water reflux of the drinking water purification device. Specifically, pure water reflux refers to the process in which the stale water in the filter assembly is replaced with pure water through at least two rounds of reflux. Specifically, the stale water in the filter assembly returns to the filter assembly through the path of the second pipeline-first pipeline-boost pump-filter assembly, and pure water is obtained after being filtered by the filter assembly. The pure water returns to the filter assembly through the above path (i.e., the second pipeline-first pipeline-boost pump-filter assembly). In the embodiment of the present application, the drinking water purification device monitors whether the pure water reflux condition is met in the following ways.

[0042] In a first possible implementation, the drinking water purification device determines that the pure water reflux condition is met when it detects that the interval between the end moment of the water extraction event and the current moment is greater than or equal to a preset time length.

[0043] A water extraction event refers to an event in which the drinking water purification device discharges water according to a water extraction instruction triggered by the user. The preset duration is set based on experiments or experience. For example, the preset duration is 10 seconds. Since after the user extracts water, the filter component usually stores the high-salinity stale water remaining after filtration, the next time the user extracts water, the drinking water purification device directly flows out the high-salinity stale water, or the drinking water purification device first refluxes the pure water and then flows out the pure water. However, this method causes the user to take water. It takes a long time, and the above two situations will bring a bad water extraction experience to the user. Therefore, in an embodiment of the present application, the drinking water purification device refluxes the pure water after a period of time after the user finishes extracting water, so that the user can obtain pure water the next time he extracts water without having to wait for a long time.

[0044] In a second possible implementation, the drinking water purification device determines that the pure water reflux condition is met when receiving a cleaning instruction. Optionally, a cleaning button is provided on the housing of the drinking water purification device, and a cleaning instruction is received when a first trigger signal (such as a press signal) for the cleaning button is received. Optionally, a first cleaning control is displayed on the touch screen of the drinking water purification device, and a cleaning instruction is received when a second trigger signal (such as a double-click signal) for the first cleaning control is received. Optionally, a control program for the drinking water purification device is installed on an external device that has a communication connection with the drinking water purification device, and the user interface of the above-mentioned control program includes a second cleaning control. When a third trigger signal (such as a single-click signal) for the second cleaning control is received, the above-mentioned external device sends a cleaning instruction to the drinking water purification device. The above-mentioned external device can be a smart phone, a tablet computer, a smart gateway, etc.

[0045] In a third possible implementation, the drinking water purification device determines that the pure water reflux condition is met when the current time is the preset cleaning time. The preset cleaning time can be customized by the user or set by the drinking water purification device by default, and this embodiment of the application is not limited thereto. For example, the preset cleaning time is 6:00 AM.

[0046] In some embodiments, the drinking water purification device can obtain the target rotation speed in the following manner: obtain a frequency reduction coefficient, and determine the target rotation speed as the product of the frequency reduction coefficient and the specified rotation speed.

[0047] The frequency reduction coefficient is greater than zero and less than one, and is set based on experiments or experience. In one example, the value of the frequency reduction coefficient can be any value between 0.55 and 0.75, such as 0.6. In some embodiments, the drinking water purification device obtains the frequency reduction coefficient in the following manner: the memory of the drinking water purification device includes a frequency reduction coefficient flag, and the drinking water purification device obtains the pre-set frequency reduction coefficient by reading the above-mentioned frequency reduction coefficient flag. The setting process of the frequency reduction coefficient is as follows: a noise detection device is set on the peripheral side of the drinking water purification device, and the noise corresponding to different speeds of the booster pump is detected by the noise detection device, and then the speed corresponding to the specified noise is selected as the target speed. The specified speed is the speed of the booster pump of the drinking water purification device in the water production mode. In the above manner, in the pure water reflux mode, the speed of the booster pump is greatly reduced, thereby reducing the noise.

[0048] The intermediate speed is less than the target speed. The intermediate speed may be one or more. In some embodiments, the drinking water purification device may obtain the intermediate speed in the following two ways.

[0049] In a first manner, the drinking water purification device obtains a first coefficient, and determines the product of the first coefficient and a specified rotation speed as the intermediate rotation speed.

[0050] The first coefficient is less than the above-mentioned frequency reduction coefficient. Optionally, the first coefficient is any value between 0.15 and 0.2, such as 0.2. It should be noted that when there are multiple intermediate speeds, there are also multiple first coefficients, the number of which is the same as the number of intermediate speeds, and the multiple first coefficients are different from each other. The first coefficient can be set based on experiments or experience. In some embodiments, a pressure detection device is provided on the peripheral side of the booster pump to detect the pressure received by the booster pump when it is started at different accelerations. Then, the developer can select a suitable specified acceleration based on the service life requirements of the pure drinking water equipment, and then determine one or more intermediate speeds based on the above-mentioned specified acceleration. Finally, based on the ratio of the intermediate speed to the specified speed, the corresponding first coefficient is determined, and then the above-mentioned first coefficient is written into the first coefficient flag in the memory of the pure drinking water equipment. Before the pure water is refluxed, the pure drinking water equipment reads the first coefficient from the above-mentioned first coefficient flag.

[0051] In the second method, the drinking water purifier obtains a second coefficient and determines the intermediate speed by multiplying the second coefficient by the target speed. It should be noted that the second coefficient is greater than zero and less than one, for example, 0.5. It should be noted that if there are multiple intermediate speeds, there will also be multiple second coefficients, the number of which is the same as the number of intermediate speeds, and the multiple second coefficients are different from each other.

[0052] The second coefficient can be set based on experimentation or experience. In some embodiments, a pressure detection device is provided around the booster pump to detect the pressure received by the booster pump when it is activated at different accelerations. Developers can then select an appropriate specified acceleration based on the service life requirements of the drinking water purification device, and then determine one or more intermediate speeds based on the specified acceleration. Finally, based on the ratio of the intermediate speed to the target speed, the corresponding second coefficient is determined. The second coefficient is then written into the second coefficient flag in the memory of the drinking water purification device. Before the drinking water purification device performs pure water recirculation, the second coefficient is read from the second coefficient flag.

[0053] Step S402: Control the speed of the boost pump to reach an intermediate speed.

[0054] In the embodiment of the present application, the drinking water purification equipment does not directly control the boost pump to speed up to the target speed, but first speeds up to an intermediate speed, and the intermediate speed is lower than the target speed in the pure water reflux mode, thereby reducing the acceleration during the startup of the boost pump, reducing vibration impact, and helping to increase the service life of the boost pump.

[0055] In some embodiments, the drinking water purification device includes a power module electrically connected to a booster pump. The drinking water purification device controls an operating parameter of the power module to be a first operating parameter so that the booster pump reaches an intermediate speed. The operating parameter of the power module includes an output voltage and / or an operating frequency of the power module.

[0056] Since the rotational speed of the booster pump is related to the output voltage and operating frequency of the power supply module. When the operating frequency of the power supply module is constant, the output voltage of the power supply module is positively correlated with the rotational speed of the booster pump, that is, the greater the output voltage of the power supply module, the greater the rotational speed of the booster pump. When the operating frequency of the power supply module is adjustable but the output voltage is constant, the operating frequency of the power supply module is positively correlated with the rotational speed of the booster pump, that is, the greater the operating frequency of the power supply module, the greater the rotational speed of the booster pump. Based on the above principle, the water purification device adjusts at least one of the operating frequency and output voltage of the power supply module to make the rotational speed of the booster pump reach the intermediate rotational speed, thereby achieving a rapid adjustment of the rotational speed of the booster pump.

[0057] It should be noted that the state where the rotational speed of the booster pump is the intermediate rotational speed needs to be maintained for a first preset duration, which is set according to experiments or experience, and the embodiments of the present application do not limit this. Exemplarily, the first preset duration is 1 second. It should be noted that when there are multiple intermediate rotational speeds, the water purification device controls the rotational speed of the booster pump to gradually increase in ascending order. Exemplarily, there are 3 intermediate rotational speeds, namely V1, V2, and V3, and V1 < V2 < V3, then the water purification device first controls the booster pump to increase its speed to V1, then to V2, and finally to V3.

[0058] Step S403, control the rotational speed of the booster pump to reach the target rotational speed, so that the stale water in the filtration component is replaced by pure water after at least two rounds of reflux processes.

[0059] After the booster pump is started, the stale water in the filtration component first flows through the second pipeline, the first pipeline, through the booster pump and then back to the filtration component. The pure water obtained after the filtration component filters it then flows through the second pipeline, the first pipeline, through the booster pump and back to the filtration component, thereby achieving the replacement of the stale water in the filtration component with pure water. It should be noted that the state where the rotational speed of the booster pump is the target rotational speed needs to be maintained for a second preset duration, which is actually set according to the time required for at least two rounds of reflux. Exemplarily, the second preset duration is 60 seconds. After the second preset duration, the water purification device controls the reflux valve, the inlet solenoid valve, the check valve, and the flushing solenoid valve to be all closed.

[0060] In some embodiments, the water purification device includes a power supply module, and the power supply module is electrically connected to the booster pump. The water purification device controls the operating parameters of the power supply module to be the second operating parameters to make the rotational speed of the booster pump reach the target rotational speed. The above-mentioned operating parameters of the power supply module include the output voltage or / and operating frequency of the power supply module.

[0061] To sum up, the technical solution provided in the embodiment of the present application obtains the intermediate speed and the target speed when monitoring that the pure water reflux conditions are met, first controls the boost pump to increase in speed to the intermediate speed, and then controls the boost pump to increase in speed from the intermediate speed to the target speed, rather than controlling the boost pump to directly speed up to the target speed. By slowly speeding up, the acceleration of the boost pump during startup is reduced, thereby reducing vibration impact, which is beneficial to extending the service life of the boost pump.

[0062] In the case that the power module is an adjustable voltage power supply, the drinking water purification equipment can adjust the speed of the booster pump by adjusting the output voltage of the power module. The following describes the process of adjusting the speed of the booster pump based on the output voltage of the power module. Figure 4 In the optional embodiments provided by the illustrated embodiment, the above step S402 can be replaced by steps S502-S503, and the above step S403 can be replaced by steps S504-S505.

[0063] Figure 5 FIG. 1 is a flow chart of a control method for a drinking water purification device provided in another embodiment of the present application. The method includes the following steps S501-S505.

[0064] Step S501 : When it is detected that the pure water reflux condition is met, the intermediate speed and target speed of the booster pump are obtained.

[0065] The intermediate speed is lower than the target speed.

[0066] Step S502: Obtain a first duty cycle.

[0067] The duty cycle is positively correlated with the output voltage of the power module. The larger the duty cycle, the higher the output voltage of the power module. Therefore, the output voltage of the power module can be adjusted by adjusting the duty cycle.

[0068] The number of first duty cycles is the same as the number of intermediate speeds, and different intermediate speeds correspond to different first duty cycles. In some embodiments, the drinking water purification device stores a first mapping relationship between the speed of the booster pump and the output voltage of the power module. The drinking water purification device searches the first mapping relationship to determine the output voltage corresponding to the intermediate speed (i.e., the first voltage), and then determines the first duty cycle based on the ratio between the output voltage corresponding to the intermediate speed and the rated voltage of the power module.

[0069] Step S503: controlling the output voltage of the power module to be a first voltage based on the first duty cycle, so that the speed of the boost pump reaches an intermediate speed.

[0070] In some embodiments, the PWM control chip adjusts the combination of the internal oscillator, resistors, and capacitors to correct the clock waveform of the oscillator so that the clock waveform of the oscillator is the same as the clock waveform corresponding to the first duty cycle. At this time, the output voltage of the power module is adjusted to the first voltage. After that, the boost pump is started under the control of the voltage module and accelerated to the intermediate speed.

[0071] Step S504: Obtain a second duty cycle.

[0072] In some embodiments, the drinking water purification device searches the above-mentioned first mapping relationship to determine the output voltage (i.e., the second voltage) corresponding to the target speed, and then determines the second duty cycle based on the ratio between the output voltage corresponding to the target speed and the rated voltage of the power module.

[0073] Step S505 : controlling the output voltage of the power module to be a second voltage based on the second duty cycle, so that the rotation speed of the boost pump reaches the target rotation speed.

[0074] The first duty cycle is less than the second duty cycle. In some embodiments, the PWM control chip adjusts the combination of an internal oscillator, a resistor, and a capacitor to correct the clock waveform of the oscillator so that the clock waveform of the oscillator is the same as the clock waveform corresponding to the second duty cycle. At this time, the output voltage of the power module is adjusted to the second voltage, and then the boost pump is accelerated from the intermediate speed to the target speed under the control of the power module.

[0075] In summary, the technical solution provided in the embodiment of the present application adjusts the output voltage of the power module through the duty cycle so that the speed of the boost pump is first accelerated to the intermediate speed and then to the target speed, rather than controlling the boost pump to directly speed up to the target speed. By slowly speeding up, the acceleration during the startup of the boost pump is reduced, thereby reducing vibration impact, which is beneficial to extending the service life of the boost pump.

[0076] In the case that the power module is a frequency-adjustable power supply, the drinking water purification equipment can adjust the speed of the booster pump by adjusting the working frequency of the power module. The following describes the process of adjusting the speed of the booster pump based on the working frequency of the power module. Figure 4 In the optional embodiments provided by the illustrated embodiment, the above step S402 can be replaced by step S602, and the above step S403 can be replaced by step S603.

[0077] Figure 6 FIG. 1 is a flow chart of a control method for a drinking water purification device provided in another embodiment of the present application. The method includes the following steps S601-S603.

[0078] Step S601 : when it is monitored that the pure water reflux condition is met, the intermediate speed of the booster pump and the target speed of the booster pump are obtained.

[0079] The intermediate speed is lower than the target speed.

[0080] Step S602: Adjust the operating frequency of the power module to a first frequency so that the rotation speed of the boost pump reaches an intermediate rotation speed.

[0081] The number of first frequencies is the same as the number of intermediate speeds, and different intermediate speeds correspond to different first frequencies. In some embodiments, the drinking water purification device stores a second mapping relationship between the speed of the booster pump and the operating frequency of the power module. The drinking water purification device searches this second mapping relationship to determine the operating frequency corresponding to the intermediate speed (i.e., the first frequency). The drinking water purification device adjusts the operating frequency of the power module to the first frequency via a frequency converter. Subsequently, the booster pump is started under the control of the power module and accelerated to the intermediate speed.

[0082] Step S603: Adjust the operating frequency of the power module to a second frequency so that the rotation speed of the boost pump reaches the target rotation speed.

[0083] The first frequency is less than the second frequency. In some embodiments, the drinking water purifier searches the second mapping relationship to determine the operating frequency corresponding to the target speed (i.e., the second frequency). The drinking water purifier adjusts the operating frequency of the power module to the second frequency via a frequency converter. The booster pump then increases speed from the intermediate speed to the target speed under the control of the power module.

[0084] In summary, the technical solution provided in the embodiment of the present application adjusts the operating frequency of the power module so that the speed of the boost pump is first accelerated to the intermediate speed and then to the target speed, rather than controlling the boost pump to directly accelerate to the target speed. By slowly accelerating, the acceleration during the startup of the boost pump is reduced, thereby reducing vibration impact, which is beneficial to extending the service life of the boost pump.

[0085] Figure 7 This is a block diagram of a control device for a drinking water purifier provided in an embodiment of the present application. This control device is applied to the drinking water purifier, which includes a reflux system comprising a filter assembly and a booster pump. The booster pump's water outlet is connected to the filter assembly's water inlet via a first pipeline, and the filter assembly's water outlet is connected to the booster pump's water inlet via a second pipeline. The device includes a rotational speed acquisition module 710, a first control module 720, and a second control module 730.

[0086] The speed acquisition module 710 is used to acquire the intermediate speed of the booster pump and the target speed of the booster pump when the pure water reflux condition is detected, and the intermediate speed of the booster pump is less than the target speed.

[0087] The first control module 720 is configured to control the rotation speed of the boost pump to reach an intermediate rotation speed.

[0088] The second control module 730 is configured to control the speed of the boost pump to reach a target speed, so that the stale water in the filter assembly is replaced with pure water after at least two rounds of reflux.

[0089] To sum up, the technical solution provided in the embodiment of the present application obtains the intermediate speed and the target speed when monitoring that the pure water reflux conditions are met, first controls the boost pump to increase in speed to the intermediate speed, and then controls the boost pump to increase in speed from the intermediate speed to the target speed, rather than controlling the boost pump to directly speed up to the target speed. By slowly speeding up, the acceleration of the boost pump during startup is reduced, thereby reducing vibration impact, which is beneficial to extending the service life of the boost pump.

[0090] In some embodiments, the drinking water purification device further includes a power module electrically connected to the booster pump. A first control module 720 is configured to control the operating parameters of the power module to be first operating parameters so that the booster pump reaches an intermediate speed. A second control module 730 is configured to control the operating parameters of the power module to be second operating parameters so that the booster pump reaches a target speed. The operating parameters of the power module include the output voltage and / or operating frequency of the power module.

[0091] In some embodiments, the operating parameters of the power module include the output voltage of the power module. A first control module 720 is configured to obtain a first duty cycle and control the output voltage of the power module to a first voltage based on the first duty cycle so that the boost pump reaches an intermediate speed. A second control module 730 is configured to obtain a second duty cycle and control the output voltage of the power module to a second voltage based on the second duty cycle so that the boost pump reaches a target speed. The first duty cycle is smaller than the second duty cycle.

[0092] In some embodiments, the operating parameters of the power module include an operating frequency of the power module. A first control module 720 is configured to adjust the operating frequency of the power module to a first frequency so that the boost pump reaches an intermediate speed. A second control module 730 is configured to adjust the operating frequency of the power module to a second frequency so that the boost pump reaches a target speed. The first frequency is less than the second frequency.

[0093] In some embodiments, the speed acquisition module 710 is used to: obtain a frequency reduction coefficient, which is greater than zero and less than one; and determine the product of the frequency reduction coefficient and the specified speed as the target speed, where the specified speed refers to the speed of the booster pump when the drinking water purification equipment is in water production mode.

[0094] In some embodiments, the speed acquisition module 710 is used to: obtain a first coefficient, determine the product of the first coefficient and the specified speed as an intermediate speed, and the first coefficient is less than the frequency reduction coefficient; or obtain a second coefficient, determine the product of the second coefficient and the target speed as an intermediate speed, and the second coefficient is greater than zero and less than one.

[0095] In some embodiments, the device further includes a condition monitoring module (not shown in the figure). The condition monitoring module is configured to determine that the pure water reflux condition is satisfied when the interval between the end time of the water withdrawal event and the current time is greater than or equal to a preset time length; or / and, when a cleaning instruction is received, determine that the pure water reflux condition is satisfied; or / and, when the current time is a preset cleaning time, determine that the pure water reflux condition is satisfied.

[0096] like Figure 8 As shown, the present application example further provides a drinking water purification device 800, which includes a processor 88, a memory 820, and a reflux system. The memory 820 stores computer program instructions.

[0097] The processor 88 may include one or more processing cores. The processor 88 utilizes various interfaces and circuits to connect various components within the battery management system. It executes instructions, programs, code sets, or instruction sets stored in the memory 820, as well as accesses data stored in the memory 820, to perform various functions of the battery management system and process data. Optionally, the processor 88 may be implemented using at least one of the following hardware forms: a digital signal processing (DSP), a field-programmable gate array (FPGA), or a programmable logic array (PLA). The processor 88 may integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. The CPU primarily handles the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing display content; and the modem handles wireless communications. It is understood that the modem may not be integrated into the processor 88 and may be implemented separately via a communication chip.

[0098] The memory 820 may include a random access memory 820 (RAM) or a read-only memory 820 (Read-Only Memory). The memory 820 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 820 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the various method examples described below, etc. The data storage area may also store data created by the water purification device during use (such as a phone book, audio and video data, chat history data, etc.).

[0099] See also Figure 9 , which shows that an embodiment of the present application also provides a computer-readable storage medium 900, in which computer program instructions 910 are stored. The computer program instructions 910 can be called by a processor to execute the method described in the above embodiment.

[0100] Computer-readable storage medium 900 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Alternatively, computer-readable storage medium 900 comprises a non-transitory computer-readable storage medium. Computer-readable storage medium 900 has storage space for computer program instructions 910 for executing any method step S in the above method. These computer program instructions 910 may be read from or written to one or more computer program products. Computer program instructions 910 may be compressed in a suitable format.

[0101] The above are merely preferred examples of the present application and do not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred example, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to equivalent examples using the technical content disclosed above without departing from the scope of the technical solution of the present application. However, any brief modifications, equivalent changes and modifications made to the above examples based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A control method for a drinking water purification device, characterized in that: Applied to a drinking water purification device, the drinking water purification device includes a reflux system; the reflux system includes a filter assembly and a booster pump; the water outlet of the booster pump is connected to the water inlet of the filter assembly through a first pipeline, and the water outlet of the filter assembly is connected to the water inlet of the booster pump through a second pipeline; the method includes: When monitoring that the pure water reflux condition is met, obtaining an intermediate speed of the booster pump and obtaining a target speed of the booster pump, wherein the intermediate speed is less than the target speed; the target speed is the product of a frequency reduction coefficient and a specified speed, the frequency reduction coefficient being greater than zero and less than one, the frequency reduction coefficient being determined based on noise corresponding to different speeds of the booster pump, and the specified speed being the speed of the booster pump when the drinking water purification device is in a water production mode; controlling the speed of the boost pump to reach the intermediate speed; The rotation speed of the boost pump is controlled to reach the target rotation speed, so that the stale water in the filter assembly is replaced by pure water after at least two rounds of reflux.

2. The method according to claim 1, characterized in that The drinking water purification device further includes a power module, and the power module is electrically connected to the booster pump; The controlling the rotation speed of the boost pump to reach the intermediate rotation speed includes: controlling the operating parameter of the power module to be a first operating parameter so that the rotation speed of the boost pump reaches the intermediate rotation speed; The controlling the rotation speed of the boost pump to reach the target rotation speed includes: controlling the operating parameter of the power module to be a second operating parameter so that the rotation speed of the boost pump reaches the target rotation speed; The operating parameters of the power module include the output voltage and / or operating frequency of the power module.

3. The method according to claim 2, characterized in that The operating parameters of the power module include the output voltage of the power module; The controlling the operating parameter of the power module to be the first operating parameter so that the speed of the boost pump reaches the intermediate speed includes: obtaining a first duty cycle, and controlling the output voltage of the power module to be a first voltage based on the first duty cycle so that the speed of the boost pump reaches the intermediate speed; The controlling the operating parameter of the power module to be a second operating parameter so that the speed of the boost pump reaches the target speed includes: obtaining a second duty cycle, and controlling the output voltage of the power module to be a second voltage based on the second duty cycle so that the speed of the boost pump reaches the target speed; The first duty cycle is smaller than the second duty cycle.

4. The method according to claim 2, characterized in that The operating parameters of the power module include the operating frequency of the power module; Controlling the operating parameter of the power module to be the first operating parameter so that the speed of the boost pump reaches the intermediate speed includes: adjusting the operating frequency of the power module to the first frequency so that the speed of the boost pump reaches the intermediate speed; The controlling the operating parameter of the power module to be the second operating parameter so that the rotation speed of the boost pump reaches the target rotation speed includes: adjusting the operating frequency of the power module to the second frequency so that the rotation speed of the boost pump reaches the target rotation speed; The first frequency is lower than the second frequency.

5. The method according to any one of claims 1 to 4, characterized in that The obtaining of the target speed of the boost pump includes: Get the frequency reduction coefficient; The product of the frequency reduction coefficient and the specified rotational speed is determined as the target rotational speed.

6. The method according to any one of claims 1 to 4, characterized in that The obtaining of the intermediate speed of the boost pump includes: Obtain a first coefficient, and determine the intermediate speed as the product of the first coefficient and the specified speed, wherein the first coefficient is less than the frequency reduction coefficient; or A second coefficient is obtained, and a product of the second coefficient and the target speed is determined as the intermediate speed, where the second coefficient is greater than zero and less than one.

7. The method according to any one of claims 1 to 4, characterized in that The method further comprises: When it is monitored that the interval between the end time of the water intake event and the current time is greater than or equal to the preset time length, determining that the pure water reflux condition is met; or / and, Upon receiving a cleaning instruction, determining that the pure water reflux condition is satisfied; or / and, When the current moment is the preset cleaning moment, it is determined that the pure water reflux condition is met.

8. A control device for a drinking water purification device, characterized in that: Applicable to a drinking water purification device, the drinking water purification device includes a reflux system; the reflux system includes a filter assembly and a booster pump; the water outlet of the booster pump is connected to the water inlet of the filter assembly through a first pipeline, and the water outlet of the filter assembly is connected to the water inlet of the booster pump through a second pipeline; the device includes: a speed acquisition module, configured to acquire an intermediate speed of the booster pump and a target speed of the booster pump when monitoring that a pure water reflux condition is satisfied, wherein the intermediate speed is less than the target speed; the target speed is the product of a frequency reduction coefficient and a specified speed, wherein the frequency reduction coefficient is greater than zero and less than one, and is determined based on the noise generated by the booster pump at different speeds; and the specified speed refers to the speed of the booster pump when the drinking water purification device is in a water production mode; a first control module, configured to control the rotational speed of the boost pump to reach the intermediate rotational speed; The second control module is used to control the rotation speed of the boost pump to reach the target rotation speed, so that the stale water in the filter assembly is replaced by pure water after at least two rounds of reflux.

9. A drinking water purification device, characterized in that: The drinking water purification equipment comprises: processor; Memory; Reflux system; the memory stores computer program instructions, and the computer program instructions are called by the processor to execute the control method of the drinking water purification equipment according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores program code, and the program code is called by a processor to execute the control method of the drinking water purification device according to any one of claims 1 to 7.

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