Hot tank water replenishing method and device, medium and purified water dispenser

Abstract

The invention provides a hot tank water supplementing method and device, a medium and a purified water dispenser, the method is applied to the field of household appliances, and the flow of purified water entering a tank body of a hot tank is controlled by controlling the rotating speed of a variable-frequency booster pump. When the water level in the tank body is a low water level, the variable-frequency booster pump supplements water to the hot tank at the highest rotating speed, the current water supplementing amount of the hot tank is obtained along with gradual rising of the water level in the tank body, and the rotating speed of the variable-frequency booster pump is proportionally reduced according to the proportion of the current water supplementing amount and the preset water supplementing amount of the hot tank, so that the water surface oscillation amplitude in the tank body is reduced; signal errors of the high-water-level probe are prevented, so that the water supplementing amount of the hot tank reaches the maximum water containing volume in the tank body.

Description

Technical Field

[0001] The present application relates to the field of household appliances, and more specifically, to a hot tank water replenishment method, device, medium and water purifier in the field of household appliances. Background Art

[0002] With the development of science and technology, people's daily life cannot do without water purifiers. Water purifiers can directly provide users with purified water, and can also transport purified water to hot tanks to provide users with heated purified water. In the related art, water purifiers use high and low water level probe control systems to achieve hot tank water replenishment. When the water replenishment speed is too fast, the water surface in the hot tank oscillates too much, which can easily cause high water level probe signal errors, and eventually stop replenishing water to the hot tank before the hot tank is full of water. Summary of the invention

[0003] The present application provides a hot tank water replenishment method, device, medium and water purifier. The method can linearly control the rotation speed of a variable frequency booster pump in the water purifier according to the gradually rising water level in the tank body of the hot tank, reduce the amplitude of water surface oscillation in the tank body, prevent high water level probe signal errors, and thereby make the water replenishment amount of the hot tank reach the maximum water capacity in the tank body.

[0004] In a first aspect, a hot tank water replenishment method is provided, the method being applied to a water purifier, the water purifier comprising a hot water replenishment valve, a hot tank and a variable frequency booster pump, the variable frequency booster pump and the hot water replenishment valve being used to replenish water into a tank body of the hot tank, the method comprising: if a water replenishment signal trigger of the hot tank is detected, opening the hot water replenishment valve to obtain a current replenishment amount in the tank body; determining a target speed of the variable frequency booster pump at the current replenishment amount based on the current replenishment amount, a preset replenishment amount of the tank body, and a preset speed of the variable frequency booster pump; and controlling the variable frequency booster pump based on the target speed to replenish water into the tank body through the variable frequency booster pump.

[0005] Through the above technical scheme, the speed of the variable frequency booster pump in the water purifier is linearly controlled according to the gradually rising water level in the tank, the amplitude of water surface oscillation in the tank is reduced, and high water level probe signal errors are prevented, so that the water replenishment amount of the hot tank reaches the maximum water capacity in the tank.

[0006] In combination with the first aspect, in some possible implementations, the step of determining the target speed of the variable frequency booster pump at the current water replenishment amount based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump includes: determining the current water replenishment proportion coefficient of the variable frequency booster pump based on the current water replenishment amount and the preset water replenishment amount of the tank; determining the preset speed difference of the variable frequency booster pump based on the first preset speed of the variable frequency booster pump when the water level of the tank is at the lowest water level and the second preset speed of the variable frequency booster pump when the water level of the tank is at the highest water level; determining the product of the preset speed difference and the current water replenishment proportion coefficient as the target speed reduction value of the variable frequency booster pump; and determining the difference between the first preset speed and the target speed reduction value as the target speed of the variable frequency booster pump at the current water replenishment amount.

[0007] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the step of determining the target speed of the variable frequency booster pump at the current water replenishment amount based on the current water replenishment amount, the preset water replenishment amount of the tank body, and the preset speed of the variable frequency booster pump includes: determining the current water replenishment proportional coefficient of the variable frequency booster pump based on the current water replenishment amount and the preset water replenishment amount of the tank body; determining the preset speed difference of the variable frequency booster pump based on the first preset speed of the variable frequency booster pump when the water level of the tank body is at the lowest water level and the second preset speed of the variable frequency booster pump when the water level of the tank body is at the highest water level; determining the product of the current water replenishment proportional coefficient and the attenuation constant as the attenuation index, and determining the target increase speed value of the variable frequency booster pump based on the attenuation index and the preset speed difference; determining the sum of the second preset speed and the target increase speed value as the target speed of the variable frequency booster pump at the current water replenishment amount.

[0008] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, after the step of controlling the variable frequency booster pump based on the target speed to replenish water into the tank body through the variable frequency booster pump, it also includes: if the current water replenishment amount is greater than or equal to the preset water replenishment amount, the hot water replenishment valve is closed.

[0009] In combination with the first aspect and the above-mentioned implementations, in some possible implementations, the method further includes: if a water production instruction is received and the hot water replenishment valve is not opened, controlling the variable frequency booster pump based on a third preset speed.

[0010] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the method also includes: if the current water level in the tank body is at a preset corrected water level, obtaining a first target water level corresponding to the current water replenishment amount; determining a target speed of the variable frequency booster pump based on the current water level, the first target water level and the current speed of the variable frequency booster pump; controlling the variable frequency booster pump based on the target speed to replenish water into the tank body through the variable frequency booster pump.

[0011] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the method also includes: if the current water level in the tank is not detected to be greater than or equal to the second target water level corresponding to the preset time length within the preset time length, a prompt message is output and the variable frequency booster pump is controlled to enter a constant pressure mode.

[0012] In a second aspect, a hot tank water replenishing device is provided, the device comprising:

[0013] A water replenishment amount acquisition unit is used to open the hot water replenishment valve and acquire the current water replenishment amount in the tank body if a water replenishment signal of a water level detection element of the hot tank is detected to be triggered;

[0014] A target speed determination unit, for determining a target speed of the variable frequency booster pump at a current water replenishment amount based on a current water replenishment amount, a preset water replenishment amount of the tank, and a preset speed of the variable frequency booster pump;

[0015] The variable frequency booster pump control unit is used to control the variable frequency booster pump based on a target speed so as to replenish water into the tank through the variable frequency booster pump.

[0016] In a third aspect, a water purifier is provided, the water purifier comprising: a memory for storing executable program code;

[0017] A processor is used to call and run executable program code from a memory to execute the method in the above-mentioned first aspect or any possible implementation manner of the first aspect.

[0018] In a fourth aspect, a computer program product is provided, comprising: a computer program code, which, when executed on a computer, enables the computer to execute the method in the first aspect or any possible implementation of the first aspect.

[0019] In a fifth aspect, a computer-readable storage medium is provided, which stores a computer program code. When the computer program code runs on a computer, the computer executes the method in the above-mentioned first aspect or any possible implementation manner of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a water purifier provided in an embodiment of the present application;

[0021] Figure 2 It is a structural schematic diagram of a hot water system provided in an embodiment of the present application;

[0022] Figure 3 It is a schematic flow chart of a hot tank water replenishment method provided in an embodiment of the present application;

[0023] Figure 4It is a schematic flow chart of a hot tank water replenishment method provided in an embodiment of the present application;

[0024] Figure 5 It is a structural schematic diagram of a hot tank water replenishing device provided in an embodiment of the present application;

[0025] Figure 6 It is a structural schematic diagram of a water purifier provided in an embodiment of the present application.

[0026] Description of labels:

[0027] 001, drinking water machine; 002, soft water system; 010, resin tank; 020, soft water valve; 030, salt box assembly; 003, water purification system; 50, filtration system; 5011, pre-filter element; 502, reverse osmosis filter element; 080, variable frequency booster pump; 54, wastewater drainage pipeline; 541, wastewater drainage pipe; 542, wastewater drainage valve; 003a, pure water outlet valve; 003b, high pressure switch; 004, hot water system; 20, hot tank assembly; 21, tank body; 22, heating element; 23, detection assembly; 232, water level detection element; 233, high water level probe; 234, low water level probe; 251, hot tank water replenishment valve; 252, hot tank water replenishment flowmeter; 253, liquid level sensor; 30, water pump; 57, pipeline machine; 1A, faucet. DETAILED DESCRIPTION

[0028] The technical solution in the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0029] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0030] See also Figure 1 , Figure 1 It is a structural schematic diagram of a water purifier 001 provided in an embodiment of the present invention.

[0031] The drinking water purifier 001 includes: the drinking water purifier 001 includes a soft water system 002, a water purification system 003 and a hot water system 004.

[0032] The soft water system 002 includes a resin tank 010 , a soft water valve 020 , and a salt box assembly 030 . Raw water enters from the raw water channel of the soft water valve 020 , passes through the resin tank 010 , and then flows out from the soft water channel of the soft water valve 020 .

[0033] The soft water system 002 also includes a salt box component 030, which can provide salt for the resin tank 010. The raw water obtains salt through the salt box pipe of the soft water valve 020 to form brine, and then completes ion exchange with the resin tank 010 to complete the regeneration process, and finally is discharged through the sewage pipe of the soft water valve 020. There is no need for users to manually add salt, which makes it convenient for users to use the water purifier 001.

[0034] The soft water system 002 further includes a soft water quality detection component 040 . When the soft water quality detection component 040 detects that the TDS value of the soft water flowing out of the first soft water outlet channel of the soft water valve 020 is abnormal, the water purifier 001 starts the regeneration step of the resin tank 010 .

[0035] When the regeneration mode is started, the controller controls the soft water valve 020 to not connect the resin tank 010 with the water outlet of the soft water system 002, and controls the soft water valve 020 to connect the water inlet and the water outlet of the soft water system 002, and controls the soft water valve 020 to connect the resin tank 010 with the salt tank assembly 030. At this time, hard water enters the resin tank 010 through the soft water valve 020, and enters the salt tank assembly 030 from the resin tank 010 through the soft water valve 020. After the water in the resin tank 010 enters the salt tank assembly 030, it contacts the regeneration salt in the salt tank assembly 030 and melts the regeneration salt to form salt water. The soft water valve 020 can draw the salt water in the salt tank assembly 030 into the resin tank 010, so as to replace the calcium and magnesium ions on the resin with the sodium ions in the salt water, thereby restoring the softening ability of the resin.

[0036] The water purification system 003 includes a pre-filter element 5011, a reverse osmosis filter element 502, a variable frequency booster pump 080, and a wastewater drainage pipeline 54. The soft water flowing out of the first soft water outlet channel of the soft water valve 020 is first filtered by the pre-filter element 5011 and then enters the variable frequency booster pump 080. Driven by the variable frequency booster pump 080, the soft water enters the reverse osmosis filter element 502 and pure water is obtained by filtering the reverse osmosis filter element 502. The concentrated water of the reverse osmosis filter element 502 is discharged from the wastewater drainage pipeline 54.

[0037] The large particles of impurities in the raw water or soft water are filtered by the pre-filter 5011, thereby reducing the filtering pressure of the reverse osmosis filter 502, thereby increasing the service life of the reverse osmosis filter 502. The pre-filter 5011 can be one or more of a stainless steel filter, a PP cotton filter, a ceramic filter, a compression filter, and an activated carbon filter, etc., which are not specifically limited here. The pre-filter 5011 can remove visible impurities such as mud, rust, and insect eggs in the water.

[0038] Reverse osmosis technology uses the principle of semipermeable membrane. Under the action of higher osmotic pressure than the solution, water passes through the semipermeable membrane while microorganisms, soluble salts, colloids, heavy metal ions, etc. cannot pass through, thereby achieving the purpose of separation, purification and concentration. The main function of the variable frequency booster pump 080 is to increase the water pressure and provide sufficient driving force for the reverse osmosis filter element 502 to work, so that water can overcome the resistance of the membrane of the reverse osmosis filter element 502 and pass through the membrane of the reverse osmosis filter element 502 smoothly, thereby achieving effective separation of impurities, salts, etc. in the water.

[0039] The wastewater drainage pipe 54 is connected to the wastewater outlet of the reverse osmosis filter element 502, and the wastewater drainage pipe 54 is used to discharge the concentrated water of the reverse osmosis filter element 502. In this way, the concentrated water in the reverse osmosis filter element 502 is discharged through the wastewater drainage pipe 541, which can maintain the osmotic pressure balance of the reverse osmosis filter element 502, thereby ensuring the filtering effect of the reverse osmosis filter element 502, and the concentrated water has high concentrations of impurities and salts that may crystallize and precipitate on the membrane surface of the reverse osmosis filter element 502, causing the membrane pores to be blocked and the water permeability of the membrane to decrease, so that the discharge of concentrated water can protect the reverse osmosis filter element 502, thereby increasing the service life of the reverse osmosis filter element 502.

[0040] Preferably, the wastewater drainage pipeline 54 includes a wastewater drainage pipe 541 and a wastewater drainage valve 542, the wastewater drainage pipe 541 is connected to the wastewater outlet of the reverse osmosis filter element 502, and the wastewater drainage valve 542 is installed on the wastewater drainage pipe 541. In this way, the flow rate of the concentrated water in the wastewater drainage pipe 541 is controlled by the wastewater drainage valve 542, so that the filtration efficiency of the reverse osmosis filter element 502 is in the best state, and a certain amount of soft water can be processed per unit time, and it can be effectively separated into pure water and concentrated water. The system runs stably, and the ratio of pure water to concentrated water is relatively stable, which can meet the designed processing capacity.

[0041] When the drainage speed is too slow, the concentrated water stays on the membrane surface of the reverse osmosis filter element 502 for too long, which will hinder the contact and separation process between the subsequent incoming water and the membrane of the reverse osmosis filter element 502, reduce the filtration efficiency of the reverse osmosis filter element 502, and manifest as a decrease in water output and a decrease in the amount of soft water processed per unit time. When the drainage speed is too fast, although the concentrated water can be quickly taken away, the pressure difference on both sides of the membrane may change, affecting the driving force of water molecules passing through the membrane of the reverse osmosis filter element 502, and also reducing the filtration efficiency, causing the water output to decrease instead of increase, and may also increase energy consumption.

[0042] The hot water system 004 includes a hot tank assembly 20 and a hot tank water supply valve 251 connected to the hot tank assembly 20. The hot tank water supply valve 251 is connected to the water outlet of the reverse osmosis filter element 502. The hot tank assembly 20 is used to provide the user with hot water softened by the soft water system 002 and purified by the water purification system 003. The hot tank assembly 20 is mainly used to store and heat pure water to provide hot water to the user. In this way, when the user needs hot water, the hot tank assembly 20 can provide hot water to the user in time, thereby shortening the time for the user to wait for the hot water to be heated and improving the user's experience.

[0043] The hot tank water replenishment valve 251 is used to control the water inlet of the hot tank assembly 20, thereby preventing the pure water filtered by the reverse osmosis filter element 502 from directly entering the hot tank assembly 20 and affecting the hot water temperature in the hot tank assembly 20 when the user receives water. The hot tank assembly 20 can then provide the user with hot water with stable temperature.

[0044] There are many ways to heat the hot tank assembly 20. The hot tank assembly 20 can heat the pure water by resistance heating, induction heating, or infrared heating, which is not specifically limited here.

[0045] When the water in the hot tank assembly 20 is insufficient, the user can manually open the hot tank water replenishing valve 251 to replenish the hot tank assembly 20 with pure water, or a detection component and a control board can be set in the hot tank assembly 20. When the detection component detects that the pure water in the hot tank assembly 20 is insufficient, the control board will open the hot tank water replenishing valve 251 to replenish the hot tank assembly 20 with water. The details are not listed here.

[0046] The hot water system 004 further includes a water pump 30, the water inlet of the hot tank assembly 20 is connected to the water outlet of the reverse osmosis filter element 502, and the water inlet end of the water pump 30 is connected to the water outlet of the hot tank assembly 20. In this arrangement, pure water can be stored by the hot tank assembly 20, and the hot tank assembly 20 can quickly provide hot water when the user needs hot water, without the user having to wait for a long time for the hot water system 004 to heat the water. At the same time, the water pump 30 can improve the water output efficiency of the hot tank assembly 20.

[0047] The water purification system 003 further includes a pure water outlet valve 003a, which is disposed between the pure water outlet and the outlet of the reverse osmosis filter element 502. With this arrangement, the user can control the pure water outlet to discharge water or stop discharging water by controlling the on and off of the pure water outlet valve 003a.

[0048] Specifically, the water purifier 001 further includes a faucet 1A, which is connected to the pure water outlet and the outlet of the hot water system 004, and the faucet 1A is used to control the water outlet of the pure water outlet and the outlet of the hot water system 004. In this way, the user can switch the pure water outlet and the hot water outlet through the faucet 1A according to the needs, so as to facilitate the user's operation, and the water outlet of the pure water outlet and the hot water outlet can be adjusted through the faucet 1A to obtain water with a suitable water temperature.

[0049] In some embodiments, the water purifier 001 further includes a pipeline machine 57, which is connected to the water outlet of the reverse osmosis filter element 502. In this configuration, the user can obtain pure water filtered by the soft water system 002 and the reverse osmosis filter element 502 through the pipeline machine 57. The pipeline machine 57 generally has multiple water volume options. The user can easily select the required water volume according to their needs through buttons or touch operations, without using other containers for measurement. It is convenient and fast, avoiding the problem of taking too much or too little water, thereby improving the user experience.

[0050] In the related art, when adding water to the hot tank assembly 20, if the water adding speed is too fast, the water surface in the tank body will oscillate too much, which may easily cause a signal error of the high water level probe 1231, and ultimately stop delivering clean water to the tank body before the tank body is filled with water.

[0051] Based on the above issues, please see Figure 2 , Figure 2 004 is a schematic diagram of the structure of a hot water system provided in an embodiment of the present application. Figure 2As shown, a hot tank water replenishment flowmeter 252 is provided between the hot tank water replenishment valve 251 and the water inlet of the tank body 21, and the water replenishment amount entering the tank body 21 is obtained through the hot tank water replenishment flowmeter 252, and then the speed of the variable frequency booster pump 080 is adjusted according to the water replenishment amount in the tank body 21. The hot tank assembly 20 includes a tank body 21, a heating element 22, a detection assembly 23 and a liquid level sensor 253. The tank body 21 is used to contain the purified water entering the hot tank assembly 20 through the hot tank water replenishment valve, and the heating element 22 is at least partially located in the tank body 21, and is used to heat the purified water to obtain hot water. The detection component 23 includes a water level detection element 232, which includes a high water level probe 233 and a low water level probe 234. The high water level probe 233 is set at the highest water level line of the tank body, and is used to determine whether the water replenishment amount in the tank body 21 reaches the maximum water capacity of the tank body 21; the low water level probe 234 is set at the lowest water level line of the tank body, and is used to determine whether the tank body 21 needs to be replenished. When the signal of the low water level probe 234 is triggered, the hot tank water replenishment valve 251 is opened to replenish water for the tank body 21, and when the signal of the high water level probe 233 is triggered, the hot tank water replenishment valve 251 is closed. The hot tank water replenishment flowmeter 252 is sandwiched between the hot tank water replenishment valve 251 and the tank body 21, and is used to obtain the water replenishment amount in the tank body 21, so as to determine the speed of the variable frequency booster pump 080 according to the water replenishment amount. Optionally, the hot tank assembly 20 may further include a liquid level sensor 253, which is installed in the tank body and is used to detect the current liquid level in the tank body, and jointly determine the rotation speed of the variable frequency booster pump 080 with the target liquid level corresponding to the current water replenishment amount of the tank body 21 measured by the hot tank water replenishment flowmeter 252 to correct the rotation speed of the variable frequency booster pump 080.

[0052] In the embodiment of the present application, the flow rate of clean water entering the tank body of the hot tank is controlled by controlling the speed of the variable frequency booster pump. When the water level in the tank body is low, the variable frequency booster pump replenishes water to the hot tank at the highest speed. As the water level in the tank body gradually rises, the current water replenishment amount of the hot tank is obtained, and the speed of the variable frequency booster pump is proportionally reduced according to the ratio of the current water replenishment amount to the preset water replenishment amount of the hot tank, so as to reduce the amplitude of the water surface oscillation in the tank body, prevent the high water level probe signal error, and then make the water replenishment amount of the hot tank reach the maximum water volume in the tank body.

[0053] based on Figure 1-2 The structural diagram shown below will be combined with Figure 3-Figure 4 , the hot tank water replenishment method provided in the embodiment of the present application is introduced in detail.

[0054] See also Figure 3 , Figure 2 Schematic diagram of a hot tank water replenishment method provided in an embodiment of the present application. Figure 3 As shown, the method of the embodiment of the present application may include the following steps S101-S103.

[0055] S101, if the water replenishment signal of the hot water tank is detected to be triggered, the hot water replenishment valve is opened to obtain the current water replenishment amount in the tank;

[0056] Specifically, a portion of the purified water in the water purifier flows into the tank body of the hot tank, where it is heated and stored to provide heated purified water to the user. The hot tank is provided with a water level detection element capable of detecting the water level, and the water level detection element includes a high water level probe and a low water level probe. If the signal of the low water level probe is triggered, it is determined that the water replenishment signal of the hot tank is triggered, and the hot water replenishment valve is opened to replenish the tank body with water. The position of the low water level probe is the lowest water level that needs to be replenished in the tank body of the hot tank, and the position of the high water level probe is the water level corresponding to the maximum water volume in the tank body. During the water replenishment process of the hot tank, the current water replenishment amount in the tank body is obtained in real time. When obtaining the current water replenishment amount, it can be obtained by installing a flow meter at the water inlet of the hot tank.

[0057] S102, determining a target speed of the variable frequency booster pump at the current water replenishment amount based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump;

[0058] Specifically, after obtaining the current water replenishment amount in the tank, the target speed of the variable frequency booster pump under the current water replenishment amount is determined based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump. Among them, the preset water replenishment amount of the tank is the maximum water volume of the tank, that is, the volume when the water level in the tank reaches the highest water level. The preset speed includes the first preset speed and the second preset speed of the variable frequency booster pump. The first preset speed is the highest speed of the variable frequency booster pump, that is, the speed of the variable frequency booster pump when the tank is at the lowest water level, and the second preset speed is the lowest speed of the variable frequency booster pump, that is, the speed of the variable frequency booster pump when the tank is at the highest water level. The speed of the variable frequency booster pump is determined by the water level in the tank. When the water level in the tank is at the lowest level, excessive water surface oscillation will not cause high water level probe signal errors. Therefore, the speed of the variable frequency booster pump can be the highest speed at this time to quickly add water to the hot tank. In the process of the water level in the tank gradually rising, the speed of the variable frequency booster pump gradually decreases until the water level reaches the highest level, and the speed of the variable frequency booster pump is the lowest speed.

[0059] S103, controlling the variable frequency booster pump based on the target speed to replenish water into the tank through the variable frequency booster pump.

[0060] Specifically, each time the target speed is determined, the variable frequency booster pump is controlled based on the target speed, so that the variable frequency booster pump is adjusted to the target speed, and then water is delivered to the hot tank through the variable frequency booster pump. The variable frequency booster pump supports real-time speed adjustment. The embodiment of the present application provides two signal control methods to adjust the speed of the variable frequency booster pump, namely a pulse width (PWM) signal control method and a current signal control method.

[0061] The PWM signal control method is a technology for controlling analog circuits by changing the pulse width. In the control of the variable frequency boost pump, the PWM signal is used to adjust the speed of the motor. The average power output of the motor is controlled by changing the duration (i.e., pulse width) of the high level (or low level), thereby realizing the adjustment of the speed. The larger the pulse width, the higher the average power received by the motor, and the faster the speed of the variable frequency boost pump. Conversely, the slower the speed. The current signal control method is to directly adjust the speed of the variable frequency boost pump by changing the size of the current. Preferably, the PWM signal control method has the advantages of fast response speed and high control accuracy, and is suitable for the scene of quickly adjusting the variable frequency boost pump in the embodiment of the present application.

[0062] In the embodiment of the present application, the flow rate of clean water entering the tank body of the hot tank is controlled by controlling the speed of the variable frequency booster pump. When the water level in the tank body is low, the variable frequency booster pump replenishes water to the hot tank at the highest speed. As the water level in the tank body gradually rises, the current water replenishment amount of the hot tank is obtained, and the speed of the variable frequency booster pump is proportionally reduced according to the ratio of the current water replenishment amount to the preset water replenishment amount of the hot tank, so as to reduce the amplitude of the water surface oscillation in the tank body, prevent the high water level probe signal error, and then make the water replenishment amount of the hot tank reach the maximum water volume in the tank body.

[0063] See also Figure 4 , Figure 4 Schematic diagram of a hot tank water replenishment method provided in an embodiment of the present application. Figure 4 As shown, the method of the embodiment of the present application may include the following steps S201-S208.

[0064] S201, if a water production instruction is received and the hot water supply valve is not opened, controlling the variable frequency booster pump based on a third preset speed;

[0065] Specifically, the water purifier provides water to users through the tap. After the water purifier produces purified water, part of the purified water does not need to be heated and flows directly to the tap, and part of the purified water flows to the tap after being heated in the hot tank. If the water purifier receives a water production instruction sent by the user, and the hot water replenishment valve at the water inlet of the hot tank is not opened, that is, the hot tank is not in the water replenishment state at this time, there is no need to adjust the speed of the variable frequency booster pump according to the water level in the tank body of the hot tank. The variable frequency booster pump is controlled based on the third preset speed, and the third preset speed can be the maximum speed of the variable frequency booster pump, so that water can be discharged from the tap quickly and stably.

[0066] S202, if the water replenishment signal of the hot tank is detected to be triggered, the hot water replenishment valve is opened to obtain the current water replenishment amount in the tank;

[0067] Specifically, a portion of the purified water in the water purifier flows into the hot tank, where it is heated and stored to provide hot water for users. The hot tank is provided with a water level detection element capable of detecting the water level, and the water level detection element includes a high water level probe and a low water level probe. If the signal of the low water level probe is triggered, it is determined that the water replenishment signal of the hot tank is triggered, and the hot water replenishment valve is opened to replenish the tank body with water. The position of the low water level probe is the lowest water level in the tank body of the hot tank that needs to be replenished, and the position of the high water level probe is the water level corresponding to the maximum water volume in the tank body. During the water replenishment process of the hot tank, the current water replenishment amount in the tank body is obtained in real time. When obtaining the current water replenishment amount, it can be obtained by installing a flow meter at the water inlet of the hot tank. Optionally, in order to avoid noise interference, the flow signal output by the flow meter can be subjected to moving average filtering.

[0068] S203, determining a current water replenishment ratio coefficient of the variable frequency booster pump based on the current water replenishment amount and the preset water replenishment amount of the tank;

[0069] Specifically, after obtaining the current water replenishment amount in the tank body, obtain the ratio of the current water replenishment amount to the preset water replenishment amount of the tank body, and determine the ratio as the current water replenishment ratio coefficient of the variable frequency booster pump. Among them, the preset water replenishment amount of the tank body is the maximum water holding volume of the tank body, that is, the volume when the water level in the tank body reaches the highest water level. In order to prevent the water surface from oscillating too much when the water level in the tank body rises, resulting in an erroneous high water level probe signal, the embodiment of the present application reduces the speed of the variable frequency booster pump proportionally according to the water level in the tank body. Therefore, it is necessary to obtain the current water replenishment ratio coefficient based on the current water replenishment amount and the preset water replenishment amount.

[0070] S204, determining a preset speed difference of the variable frequency booster pump based on a first preset speed of the variable frequency booster pump when the water level of the tank is at the lowest water level and a second preset speed of the variable frequency booster pump when the water level of the tank is at the highest water level;

[0071] Specifically, the difference between the first preset speed of the variable frequency booster pump when the tank is at the lowest water level and the second preset speed of the variable frequency booster pump when the tank is at the highest water level is obtained, and the difference is determined as the preset speed difference of the variable frequency booster pump. The first preset speed is the highest speed of the variable frequency booster pump, that is, the speed of the variable frequency booster pump when the tank is at the lowest water level, and the second preset speed is the lowest speed of the variable frequency booster pump, that is, the speed of the variable frequency booster pump when the tank is at the highest water level. The speed of the variable frequency booster pump is determined according to the water level of the tank. When the water level in the tank is at the lowest water level, the excessive amplitude of the water surface oscillation will not cause the high water level probe signal error. Therefore, the speed of the variable frequency booster pump can be the highest speed at this time, so as to quickly add water to the hot tank. In the process of the water level in the tank gradually rising, the speed of the variable frequency booster pump gradually decreases until the water level reaches the highest water level, and the speed of the variable frequency booster pump is the lowest speed.

[0072] S205, determining the product of the preset speed difference and the current water replenishment ratio coefficient as the target speed reduction value of the variable frequency booster pump;

[0073] S206, determining the difference between the first preset speed and the target speed reduction value as the target speed of the variable frequency booster pump at the current water replenishment amount;

[0074] Specifically, if the current water replenishment volume in the tank is V t , the preset water replenishment volume is V total , the first preset speed is N max , the second preset speed is N min , then the final target speed value of the variable frequency booster pump is

[0075]

[0076] In a feasible implementation, in order to further prevent excessive water surface oscillation during the hot tank water replenishment process, the target speed value of the variable frequency booster pump can also be

[0077]

[0078] Among them, k is the speed reduction slope coefficient, and the value range of k is 0.2-0.5. The specific value of k can be debugged through experiments. During debugging, a static debugging method can be used. When the current water replenishment amount of the hot tank is half of the preset water replenishment amount, multiple target speed values ​​are obtained by adjusting the value of k. The variable frequency booster pump is controlled according to the multiple target speed values ​​in turn, and the k value corresponding to the target speed value with the water surface oscillation amplitude less than 2mm in the hot tank is determined as the final speed reduction slope coefficient. A dynamic debugging method can also be used. During the hot tank water replenishment process, the oscillation amplitude of the water surface is monitored and recorded in real time. If the oscillation amplitude of the water surface is too large or even triggers the high water level probe signal in advance, the k value is increased to reduce the target speed of the variable frequency booster pump; if the hot tank water replenishment time is too long, the k value is reduced to increase the target speed of the variable frequency booster pump.

[0079] In a feasible implementation, the target speed of the variable frequency booster pump can also be determined according to the exponential decay model. Specifically, based on the current water replenishment amount and the preset water replenishment amount of the tank, the current water replenishment proportional coefficient of the variable frequency booster pump is determined, based on the first preset speed of the variable frequency booster pump when the water level of the tank is at the lowest water level and the second preset speed of the variable frequency booster pump when the water level of the tank is at the highest water level, the preset speed difference of the variable frequency booster pump is determined, the product of the current water replenishment proportional coefficient and the attenuation constant is determined as the attenuation index, based on the attenuation index and the preset speed difference, the target increase speed value of the variable frequency booster pump is determined, and the sum of the second preset speed and the target increase speed value is determined as the target speed of the variable frequency booster pump at the current water replenishment amount. According to the exponential decay model, the target speed is

[0080]

[0081] Where e is the base of the natural logarithm, approximately equal to 2.7, and λ is the decay constant.

[0082] Optionally, during the hot tank water replenishment process, problems such as device aging may occur, resulting in the current water replenishment amount measured by the flow meter being inconsistent with the actual water replenishment amount in the tank body. Therefore, the tank body needs to be corrected for water level. A liquid level sensor can also be set in the hot tank. When performing water level correction, multiple corrected water point positions are pre-set. If the liquid level sensor detects that the current water level in the tank body is at the preset corrected water level, the first target water level corresponding to the current water replenishment amount is obtained. Based on the current water level, the first target water level and the current speed of the variable frequency booster pump, the target speed of the variable frequency booster pump is determined. The variable frequency booster pump is controlled based on the target speed to deliver water to the hot tank through the variable frequency booster pump. If the current water level is h actual The first target water level calculated based on the current water replenishment amount and the bottom area of ​​the hot tank is h target , the corrected target speed is

[0083] N final =N v +k p (h target -h actual ),

[0084] Among them, k p k is the proportional coefficient between the variable frequency booster pump and the water level in the tank, that is, the ratio of the speed reduced by the variable frequency booster pump to the current speed of the variable frequency booster pump when the water level in the tank rises by a unit height, p The value range is 0.2-1. Optionally, in order to avoid noise interference, the liquid level signal output by the liquid level sensor can also be subjected to moving average filtering. When the liquid level sensor fails, the hot water replenishment valve can be opened once every unit time, so that a preset fixed amount of clean water enters the tank body every unit time. Based on this, when calculating the current replenishment amount, the cumulative time of hot tank replenishment and the preset fixed amount per unit time can be used for calculation.

[0085] S207, controlling the variable frequency booster pump based on the target speed to replenish water into the tank through the variable frequency booster pump;

[0086] Specifically, each time the target speed is determined, the variable frequency booster pump is controlled based on the target speed, so that the variable frequency booster pump is adjusted to the target speed, and then water is delivered to the hot tank through the variable frequency booster pump. The variable frequency booster pump supports real-time speed adjustment. The embodiment of the present application provides two signal control methods to adjust the speed of the variable frequency booster pump, namely a pulse width (PWM) signal control method and a current signal control method.

[0087] The PWM signal control method is a technology for controlling analog circuits by changing the pulse width. In the control of the variable frequency boost pump, the PWM signal is used to adjust the speed of the motor. The average power output of the motor is controlled by changing the duration (i.e., pulse width) of the high level (or low level), thereby realizing the adjustment of the speed. The larger the pulse width, the higher the average power received by the motor, and the faster the speed of the variable frequency boost pump. Conversely, the slower the speed. The current signal control method is to directly adjust the speed of the variable frequency boost pump by changing the size of the current. Preferably, the PWM signal control method has the advantages of fast response speed and high control accuracy, and is suitable for the scene of quickly adjusting the variable frequency boost pump in the embodiment of the present application.

[0088] Optionally, in order to prevent a sudden change in the speed of the variable frequency booster pump, which may cause mechanical shock, a preset speed change rate threshold may be set, such as 500 rpm / s, to prevent the speed of the variable frequency booster pump from changing too much per unit time.

[0089] S208: If the current water replenishment amount is greater than or equal to the preset water replenishment amount, the hot water replenishment valve is closed.

[0090] Specifically, during the hot tank water replenishment process, if it is detected that the current water replenishment amount in the tank is greater than or equal to the preset water replenishment amount, that is, the water level in the tank reaches the maximum water level, the hot water replenishment valve is closed. At the same time, the current water replenishment amount stored in the memory of the water purifier needs to be cleared.

[0091] In a feasible implementation, the mapping relationship between the water replenishment time and the target water level is predetermined. If the current water level in the hot tank is not detected to be greater than or equal to the second target water level corresponding to the preset time within the preset time, a prompt message is output and the variable frequency booster pump is controlled to enter the constant pressure mode. Optionally, the water purifier may include a display screen and / or an audio component to output prompt information in the form of text display and / or prompt sound to prompt the user to troubleshoot the fault in the water purifier. The constant pressure mode of the variable frequency booster pump is that the variable frequency booster pump automatically adjusts the speed according to the change of water pressure in the pipeline, so that the water pressure in the pipeline is constant, and the water flow is stable and continues to flow into the hot tank.

[0092] In an embodiment of the present application, when the hot tank is not replenished, the faucet produces water normally, and the variable frequency booster pump is controlled at a third preset speed to ensure that the faucet can quickly and stably discharge water. When the hot tank is replenished, the speed of the variable frequency booster pump is proportionally reduced according to the ratio of the current replenishment amount in the tank body to the preset replenishment amount, so as to reduce the amplitude of the water surface oscillation in the tank body, prevent the high water level probe signal error, and then make the water replenishment amount of the tank body reach the maximum water volume in the tank body. The speed change rate threshold is set in advance, and during the speed reduction process of the variable frequency booster pump, the speed of the variable frequency booster pump is prevented from suddenly changing, causing mechanical shock, and further preventing the water surface from oscillating too much. During the replenishment process, the target speed is timely corrected according to the replenishment amount and the actual water level in the tank body to reduce the impact of mechanical aging and ensure the use effect of the water purifier.

[0093] based on Figure 1-Figure 2 The structural diagram of Figure 5 , the hot tank water replenishing device provided in the embodiment of the present application is introduced in detail. It should be noted that, Figure 5 The hot tank water replenishment device in the present invention is used to implement the present invention. Figure 3-Figure 4 For the convenience of explanation, only the part related to the embodiment of the present application is shown. For the specific technical details not disclosed, please refer to the present application. Figure 3-Figure 4 The embodiment shown.

[0094] See also Figure 5 , Figure 5 Schematic diagram of the structure of a hot tank water replenishment device provided in an embodiment of the present application. Figure 5 As shown, the hot tank water replenishment device 1 of the embodiment of the present application may include: a water replenishment amount acquisition unit 11, a target speed determination unit 12 and a variable frequency booster pump control unit 13.

[0095] The water replenishment amount acquisition unit 11 is used to open the hot water replenishment valve to obtain the current water replenishment amount in the tank body if the water replenishment signal of the water level detection element of the hot tank is detected to be triggered;

[0096] The target speed determination unit 12 is used to determine the target speed of the variable frequency booster pump at the current water replenishment amount based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump;

[0097] The variable frequency booster pump control unit 13 is used to control the variable frequency booster pump based on the target speed, so as to replenish water into the tank through the variable frequency booster pump.

[0098] Optionally, the target speed determination unit 12 is specifically used to determine the current water replenishment ratio coefficient of the variable frequency booster pump based on the current water replenishment amount and the preset water replenishment amount of the tank;

[0099] Determine a preset speed difference of the variable frequency booster pump based on a first preset speed of the variable frequency booster pump when the water level of the tank is at the lowest water level and a second preset speed of the variable frequency booster pump when the water level of the tank is at the highest water level;

[0100] The product of the preset speed difference and the current water replenishment ratio coefficient is determined as the target speed reduction value of the variable frequency booster pump;

[0101] The difference between the first preset speed and the target speed reduction value is determined as the target speed of the variable frequency booster pump at the current water replenishment amount.

[0102] Optionally, the target speed determination unit 12 is specifically used to determine the current water replenishment ratio coefficient of the variable frequency booster pump based on the current water replenishment amount and the preset water replenishment amount of the tank;

[0103] Determine a preset speed difference of the variable frequency booster pump based on a first preset speed of the variable frequency booster pump when the water level of the tank is at the lowest water level and a second preset speed of the variable frequency booster pump when the water level of the tank is at the highest water level;

[0104] The product of the current water replenishment ratio coefficient and the attenuation constant is determined as the attenuation index, and the target speed value of the variable frequency booster pump is determined based on the attenuation index and the preset speed difference;

[0105] The sum of the second preset speed and the target speed increase value is determined as the target speed of the variable frequency booster pump at the current water replenishment amount.

[0106] Optionally, the hot water tank water replenishment device 1 is specifically used to close the hot water replenishment valve if the current water replenishment amount is greater than or equal to the preset water replenishment amount.

[0107] Optionally, the hot tank water replenishment device 1 is specifically used to control the variable frequency booster pump based on a third preset speed if a water production instruction is received and the hot water replenishment valve is not opened.

[0108] Optionally, the hot tank water replenishment device 1 is specifically used to obtain a first target water level corresponding to the current water replenishment amount if the current water level in the tank body is at a preset correction water level;

[0109] Determine a target speed of the variable frequency booster pump based on the current water level, the first target water level and the current speed of the variable frequency booster pump;

[0110] The variable frequency booster pump is controlled based on the target speed to replenish water into the tank through the variable frequency booster pump.

[0111] Optionally, the hot tank water replenishing device 1 is specifically used to output a prompt message and control the variable frequency booster pump to enter a constant pressure mode if the current water level in the tank body is not detected to be greater than or equal to a second target water level corresponding to the preset time length within a preset time length.

[0112] In an embodiment of the present application, when the hot tank is not replenished, the faucet produces water normally, and the variable frequency booster pump is controlled at a third preset speed to ensure that the faucet can quickly and stably discharge water. When the hot tank is replenished, the speed of the variable frequency booster pump is proportionally reduced according to the ratio of the current replenishment amount in the tank body to the preset replenishment amount, so as to reduce the amplitude of the water surface oscillation in the tank body, prevent the high water level probe signal error, and then make the water replenishment amount of the tank body reach the maximum water volume in the tank body. The speed change rate threshold is set in advance, and during the speed reduction process of the variable frequency booster pump, the speed of the variable frequency booster pump is prevented from suddenly changing, causing mechanical shock, and further preventing the water surface from oscillating too much. During the replenishment process, the target speed is timely corrected according to the replenishment amount and the actual water level in the tank body to reduce the impact of mechanical aging and ensure the use effect of the water purifier.

[0113] See also Figure 6 , Figure 6 It is a structural schematic diagram of a water purifier provided in an embodiment of the present application.

[0114] For example, Figure 6 As shown, the water purifier 600 includes: a processor 601 and a memory 602, wherein the processor 601 is electrically connected to the memory 602.

[0115] The processor 601 is the control center of the water purifier 600 and may include one or more processing cores. The processor 601 uses various interfaces and lines to connect the various parts of the entire water purifier, and executes various functions and processes data of the water purifier by running or calling the computer program stored in the memory 602, and calling the data stored in the memory 602, so as to control the water purifier 600 as a whole. Optionally, the processor 601 can be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processor 601 can integrate one or a combination of CPU, graphics processing unit (GPU), modem, etc. Among them, the CPU mainly processes the operating system, user pages, and applications; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 601, but may be implemented separately through a communication chip.

[0116] The memory 602 can be used to store software programs and modules, and the processor 601 executes various functional applications and data processing by running the computer programs and modules stored in the memory 602. The memory 602 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, a computer program required for at least one function, etc.; the data storage area can store data created according to the use of the water purifier 600, etc.

[0117] In addition, the memory 602 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 602 may also include a memory controller to provide the processor 601 with access to the memory 602.

[0118] In this embodiment, the processor 601 in the water purifier 600 will load the instructions corresponding to the processes of one or more computer programs into the memory 602 according to the following steps, and the processor 601 will run the computer program stored in the memory 602 to implement various functions, as follows:

[0119] If the water replenishment signal of the hot tank is detected, the hot water replenishment valve is opened to obtain the current water replenishment amount in the tank;

[0120] Based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump, the target speed of the variable frequency booster pump at the current water replenishment amount is determined;

[0121] The variable frequency booster pump is controlled based on the target speed to replenish water into the tank through the variable frequency booster pump.

[0122] Optionally, when the processor 601 determines the target speed of the variable frequency booster pump at the current water replenishment amount based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump, the processor 601 specifically executes:

[0123] Based on the current water replenishment amount and the preset water replenishment amount of the tank, determine the current water replenishment ratio coefficient of the variable frequency booster pump;

[0124] Determine a preset speed difference of the variable frequency booster pump based on a first preset speed of the variable frequency booster pump when the water level of the tank is at the lowest water level and a second preset speed of the variable frequency booster pump when the water level of the tank is at the highest water level;

[0125] The product of the preset speed difference and the current water replenishment ratio coefficient is determined as the target speed reduction value of the variable frequency booster pump;

[0126] The difference between the first preset speed and the target speed reduction value is determined as the target speed of the variable frequency booster pump at the current water replenishment amount.

[0127] Optionally, when the processor 601 determines the target speed of the variable frequency booster pump at the current water replenishment amount based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump, the processor 601 specifically executes:

[0128] Based on the current water replenishment amount and the preset water replenishment amount of the tank, determine the current water replenishment ratio coefficient of the variable frequency booster pump;

[0129] Determine a preset speed difference of the variable frequency booster pump based on a first preset speed of the variable frequency booster pump when the water level of the tank is at the lowest water level and a second preset speed of the variable frequency booster pump when the water level of the tank is at the highest water level;

[0130] The product of the current water replenishment ratio coefficient and the attenuation constant is determined as the attenuation index, and the target speed value of the variable frequency booster pump is determined based on the attenuation index and the preset speed difference;

[0131] The sum of the second preset speed and the target speed increase value is determined as the target speed of the variable frequency booster pump at the current water replenishment amount.

[0132] Optionally, after executing the control of the variable frequency booster pump based on the target speed to replenish water into the tank through the variable frequency booster pump, the processor 601 further executes:

[0133] If the current water replenishment amount is greater than or equal to the preset water replenishment amount, the hot water replenishment valve is closed.

[0134] Optionally, the processor 601 further executes:

[0135] If a water production instruction is received and the hot water replenishment valve is not opened, the variable frequency booster pump is controlled based on the third preset speed.

[0136] Optionally, the processor 601 further executes:

[0137] If the current water level in the tank is at the preset correction water level, the first target water level corresponding to the current water replenishment amount is obtained;

[0138] Determine a target speed of the variable frequency booster pump based on the current water level, the first target water level and the current speed of the variable frequency booster pump;

[0139] The variable frequency booster pump is controlled based on the target speed to replenish water into the tank through the variable frequency booster pump.

[0140] Optionally, the processor 601 further executes:

[0141] If the current water level in the tank is not detected to be greater than or equal to the second target water level corresponding to the preset time length within the preset time length, a prompt message is output and the variable frequency booster pump is controlled to enter the constant pressure mode.

[0142] In an embodiment of the present application, when the hot tank is not replenished, the faucet produces water normally, and the variable frequency booster pump is controlled at a third preset speed to ensure that the faucet can quickly and stably discharge water. When the hot tank is replenished, the speed of the variable frequency booster pump is proportionally reduced according to the ratio of the current replenishment amount in the tank body to the preset replenishment amount, so as to reduce the amplitude of the water surface oscillation in the tank body, prevent the high water level probe signal error, and then make the water replenishment amount of the tank body reach the maximum water volume in the tank body. The speed change rate threshold is set in advance, and during the speed reduction process of the variable frequency booster pump, the speed of the variable frequency booster pump is prevented from suddenly changing, causing mechanical shock, and further preventing the water surface from oscillating too much. During the replenishment process, the target speed is timely corrected according to the replenishment amount and the actual water level in the tank body to reduce the impact of mechanical aging and ensure the use effect of the water purifier.

[0143] It should be understood that the device provided in the embodiment of the present application is used to execute the above-mentioned hot tank water replenishment method, and thus can achieve the same effect as the above-mentioned implementation method.

[0144] In the case of an integrated unit, the device may include a processing module and a storage module. When the device is applied to a water purifier, the processing module may be used to control and manage the actions of the water purifier. The storage module may be used to support the water purifier to execute related program codes, etc.

[0145] The processing module may be a processor or a controller, which may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module may be a memory.

[0146] In addition, the device provided in the embodiment of the present application can specifically be a chip, a component or a module, and the chip may include a connected processor and a memory; wherein the memory is used to store instructions, and when the processor calls and executes the instructions, the chip can execute a hot tank water replenishment method provided in the above embodiment.

[0147] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program code is stored. When the computer program code is run on a computer, the computer executes the above-mentioned related method steps to implement a hot tank water replenishment method provided in the above embodiment.

[0148] This embodiment also provides a computer program product. When the computer program product is run on a computer, the computer is caused to execute the above-mentioned related steps to implement a hot tank water replenishment method provided in the above embodiment.

[0149] Among them, the device, computer-readable storage medium, computer program product or chip provided in this embodiment is used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be repeated here.

[0150] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0151] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0152] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A hot tank water replenishment method, characterized in that: Applied to a water purifier, the water purifier comprises a hot water replenishing valve, a hot tank and a variable frequency booster pump, the variable frequency booster pump and the hot water replenishing valve are used to replenish water into the tank body of the hot tank, the method comprises: If the water replenishment signal of the hot tank is detected to be triggered, the hot water replenishment valve is opened to obtain the current water replenishment amount in the tank body; Determine a target speed of the variable frequency booster pump at the current water replenishment amount based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump; The variable frequency booster pump is controlled based on the target rotation speed so as to replenish water into the tank through the variable frequency booster pump.

2. The method according to claim 1, characterized in that The determining, based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump, a target speed of the variable frequency booster pump at the current water replenishment amount includes: Determining a current water replenishment ratio coefficient of the variable frequency booster pump based on the current water replenishment amount and the preset water replenishment amount of the tank; Determine a preset speed difference of the variable frequency booster pump based on a first preset speed of the variable frequency booster pump when the water level of the tank is at the lowest water level and a second preset speed of the variable frequency booster pump when the water level of the tank is at the highest water level; The product of the preset speed difference and the current water replenishment ratio coefficient is determined as the target speed reduction value of the variable frequency booster pump; The difference between the first preset speed and the target speed reduction value is determined as the target speed of the variable frequency boost pump at the current water replenishment amount.

3. The method according to claim 2, characterized in that The method further comprises: Determining a current water replenishment ratio coefficient of the variable frequency booster pump based on the current water replenishment amount and the preset water replenishment amount of the tank; Determine a preset speed difference of the variable frequency booster pump based on a first preset speed of the variable frequency booster pump when the water level of the tank is at the lowest water level and a second preset speed of the variable frequency booster pump when the water level of the tank is at the highest water level; The product of the current water replenishment ratio coefficient and the attenuation constant is determined as an attenuation index, and based on the attenuation index and the preset speed difference, a target speed increase value of the variable frequency booster pump is determined; The sum of the second preset speed and the target speed increase value is determined as the target speed of the variable frequency boost pump at the current water replenishment amount.

4. The method according to claim 1, characterized in that: After the variable frequency booster pump is controlled based on the target speed to replenish water into the tank through the variable frequency booster pump, the method further includes: If the current water replenishment amount is greater than or equal to the preset water replenishment amount, the hot water replenishment valve is closed.

5. The method according to claim 1, characterized in that The method further comprises: If a water production instruction is received and the hot water replenishment valve is not opened, the variable frequency booster pump is controlled based on a third preset speed.

6. The method according to claim 1, characterized in that The method further comprises: If the current water level in the tank is at the preset corrected water level, obtaining a first target water level corresponding to the current water replenishment amount; Determining a target speed of the variable frequency booster pump based on the current water level, the first target water level, and the current speed of the variable frequency booster pump; The variable frequency booster pump is controlled based on the target rotation speed so as to replenish water into the tank through the variable frequency booster pump.

7. The method according to claim 1, characterized in that The method further comprises: If it is not detected within the preset time that the current water level in the tank is greater than or equal to the second target water level corresponding to the preset time, a prompt message is output and the variable frequency booster pump is controlled to enter a constant pressure mode.

8. A hot tank water replenishing device, characterized in that: The device comprises: A water replenishment amount acquisition unit, configured to open the hot water replenishment valve and acquire the current water replenishment amount in the tank body if a water replenishment signal of a water level detection element of the hot tank is detected to be triggered; a target speed determination unit, configured to determine a target speed of the variable frequency booster pump at the current water replenishment amount based on the current water replenishment amount, the preset water replenishment amount of the tank, and the preset speed of the variable frequency booster pump; A variable frequency booster pump control unit is used to control the variable frequency booster pump based on the target speed so as to replenish water into the tank through the variable frequency booster pump.

9. A water purifier, characterized in that: The water purifier comprises: A memory for storing executable program codes; A processor, used to call and run the executable program code from the memory, so that the water purifier executes the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program code, and when the computer program code is executed, the method according to any one of claims 1 to 7 is implemented.

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