Water purification device

Abstract

The utility model discloses a water purifying device, and relates to the technical field of drinking water supply, the water purifying device comprises: a fine filtration assembly; the water inlet waterway is provided with a booster pump and a pressure stabilizing assembly, the water inlet waterway is communicated with the inlet of the fine filtering assembly, and the pressure stabilizing assembly is located at the upstream of the booster pump; the normal-temperature water outlet waterway can be communicated with the purified water outlet of the fine filtering assembly; the hot water assembly can be communicated with the purified water outlet of the fine filtering assembly; and the hot water outlet waterway is communicated with an outlet of the hot water assembly. The problem that the water outlet temperature is inaccurate due to the fact that the flow of purified water output by the fine filtering assembly is unstable due to water source pressure can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drinking water supply, and particularly relates to a water purification device. Background Art

[0002] With the continuous improvement of people's living standards, the quality requirements for drinking water are also increasing day by day. As a device that can effectively purify water quality, the water purification device has been widely used in daily life. At present, many water purification devices on the market have the function of outputting hot water and normal temperature water. By simultaneously outputting hot water and normal temperature water and mixing them, medium-temperature water at the temperature required by users can be obtained to meet the drinking water needs of users at different temperatures.

[0003] However, in the actual use process, there are some problems with the existing water purification devices. Due to the instability of the water source pressure, the purified water flow output by the fine filtration component under the action of the booster pump will fluctuate. This unstable purified water flow directly leads to the instability of the output normal temperature water flow and hot water flow. That is to say, under a given duty cycle of the booster pump, there is a deviation between the output normal temperature water flow and the expected output normal temperature water flow under this given duty cycle of the booster pump. Furthermore, when the water purification device mixes hot water and cold water to obtain medium-temperature water, the outlet water temperature is difficult to accurately control. This not only affects the user experience but also may not meet the user's demand for drinking water at a specific temperature. Therefore, how to solve the problem of inaccurate outlet water temperature caused by the unstable purified water flow output by the fine filtration component due to the water source pressure to achieve accurate control of the outlet water temperature of the water purification device has become an urgent problem to be solved in the current technical field of water purification devices. Summary of the Utility Model

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present utility model is to provide a water purification device, which can solve the problem of inaccurate outlet water temperature caused by the unstable purified water flow output by the fine filtration component due to the water source pressure.

[0005] The specific technical solution of the embodiment of the present utility model is as follows:

[0006] A water purification device, the water purification device includes:

[0007] A fine filtration component;

[0008] An inlet water circuit with a booster pump and a voltage stabilizing component, the inlet water circuit is communicated with the inlet of the fine filtration component, and the voltage stabilizing component is located upstream of the booster pump;

[0009] A normal temperature water outlet water circuit, the normal temperature water outlet water circuit can be communicated with the purified water outlet of the fine filtration component;

[0010] A hot water assembly that can be connected to the purified water outlet of the fine filtration assembly;

[0011] A hot water outlet water path that is connected to the outlet of the hot water assembly;

[0012] A water pump provided on the hot water outlet water path, and the water pump is used to drive the hot water of the hot water assembly to be output through the hot water outlet water path.

[0013] Preferably, the pressure stabilizing assembly includes a pressure reducing valve.

[0014] Preferably, the hot water assembly includes an instant heating module.

[0015] Preferably, the hot water assembly includes: a storage tank that can be connected to the purified water outlet of the fine filtration assembly; a heating element for heating the purified water in the storage tank.

[0016] Preferably, the water purification device includes:

[0017] A first temperature detection component that is used to obtain the temperature of the normal temperature water flowing into or out of the fine filtration assembly;

[0018] A flow rate detection component that is used to obtain the flow rate of the normal temperature water flowing out of the purified water outlet of the fine filtration assembly;

[0019] A second temperature detection component for detecting the temperature of the hot water in the storage tank or the temperature of the hot water flowing out of the storage tank; or, the preset temperature of the hot water in the storage tank or the temperature of the hot water flowing out of the storage tank is stored in the water purification device.

[0020] Preferably, the corresponding relationship between the preset mixed water temperature of the output, the duty ratio of the booster pump, and the duty ratio of the water pump is stored in the water purification device;

[0021] A control unit that is electrically connected to the first temperature detection component and the flow rate detection component. When the water purification device has the second temperature detection component, the control unit is also electrically connected to the second temperature detection component;

[0022] The water purification device has a first state. In the first state, the control unit controls the duty ratio of the booster pump and the duty ratio of the water pump according to the preset corresponding relationship between the mixed water temperature of the output required by the user, the duty ratio of the booster pump, and the duty ratio of the water pump, so that the normal temperature water outlet water path outputs normal temperature water under the action of the booster pump, and the hot water outlet water path outputs hot water under the action of the water pump.

[0023] Preferably, the water purification device has a second state. In the second state, the control unit adjusts the duty ratio of the booster pump according to the temperature of the water required by the user, the duty ratio of the water pump, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water, so that the temperature of the mixture of the normal temperature water output from the normal temperature water outlet waterway and the hot water output from the hot water outlet waterway is closer to or equal to the temperature of the water required by the user; the water purification device executes the second state after executing the first state.

[0024] Preferably, the water purification device has a second state. In the second state, the control unit adjusts the duty ratio of the water pump according to the temperature of the water required by the user, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water, so as to control the heat of the hot water output from the hot water outlet waterway under the action of the water pump, so that the temperature of the mixture of the normal temperature water output from the normal temperature water outlet waterway and the hot water output from the hot water outlet waterway is closer to or equal to the temperature of the water required by the user; the water purification device executes the second state after executing the first state.

[0025] Preferably, the water purification device has a third state. In the third state, the control unit controls the booster pump to be in the on state and the water pump to be in the off state according to the temperature of the water required by the user.

[0026] Preferably, a first on-off valve is provided on the hot water outlet waterway. In the third state, the first on-off valve is in the off state.

[0027] Preferably, the water purification device has a fourth state. In the fourth state, the control unit controls the booster pump to be in the off state, the normal temperature water outlet waterway to be in a non-water output state, and the water pump to be in the on state according to the temperature of the water required by the user.

[0028] Preferably, a second on-off valve is provided on the normal temperature water outlet waterway. In the fourth state, the second on-off valve is in the off state.

[0029] Preferably, the corresponding relationship between the preset mixed water temperature output and the duty ratio of the booster pump and the duty ratio of the water pump is: the corresponding relationship between the mixed water temperature output measured under a fixed preset pressure of the raw water entering the fine filtration component and the duty ratio of the booster pump and the duty ratio of the water pump;

[0030] Or,

[0031] The corresponding relationships between the preset temperature of the mixed water output, the temperature of the normal temperature water, the temperature of the hot water, the duty cycle of the booster pump, and the duty cycle of the water pump are as follows: They are the corresponding relationships measured under the condition that the pressure of the raw water entering the fine filtration component is a fixed preset pressure and the temperature of the raw water entering the fine filtration component is a fixed preset temperature, between the output mixed water temperature and the duty cycle of the booster pump and the duty cycle of the water pump.

[0032] Preferably, the first state includes a first sub-state of the first state. In the first sub-state of the first state, the temperature of the water required by the user satisfies the first preset temperature range, and the duty cycle of the booster pump is 100%.

[0033] Preferably, the first state includes a second sub-state of the first state. In the second sub-state of the first state, the temperature of the water required by the user satisfies the second preset temperature range, the duty cycle of the booster pump is 0%, and the minimum value of the second preset temperature range is greater than the maximum value of the first preset temperature range.

[0034] Preferably, in the second sub-state of the first state, the duty cycle of the water pump is 100%.

[0035] Preferably, the first state includes a third sub-state of the first state. In the third sub-state of the first state, the temperature of the water required by the user satisfies the third preset temperature range, the duty cycle of the water pump is greater than 0 and less than 100%, the duty cycle of the booster pump is greater than 0 and less than 100%, the minimum value of the third preset temperature range is greater than the maximum value of the first preset temperature range, and the maximum value of the third preset temperature range is less than the minimum value of the second preset temperature range.

[0036] Preferably, the water purification device has a second state, and the second state includes a first sub-state of the second state. In the first sub-state of the second state, the temperature of the water required by the user satisfies the first preset temperature range, and the control unit adjusts the duty cycle of the water pump according to the temperature of the water required by the user, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water.

[0037] Preferably, the water purification device has a second state, and the second state includes a second sub-state of the second state. In the second sub-state of the second state, when the temperature of the water required by the user satisfies the second preset temperature range, the control unit adjusts the duty cycle of the water pump according to the temperature of the water required by the user, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water.

[0038] Preferably, the water purification device has a second state, and the second state includes a third sub-state of the second state. In the third sub-state of the second state, the temperature of the water required by the user satisfies a third preset temperature range, and the control unit adjusts the duty cycle of the booster pump according to the temperature of the water required by the user, the duty cycle of the water pump, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water.

[0039] The technical solution of the present utility model has the following remarkable beneficial effects:

[0040] When the user needs water at a certain temperature between the temperature of the normal temperature water and the hot water output by the hot water component, the water purification device can control the duty cycle of the booster pump and the duty cycle of the water pump at the values corresponding to the temperature of the water required by the user based on the temperature of the water required by the user, so as to control the flow rate of the normal temperature water output by the normal temperature water outlet waterway under the action of the booster pump and the flow rate of the hot water output by the hot water outlet waterway under the action of the water pump, so that the temperature of the mixed water formed by the two is close to or equal to the temperature of the water required by the user. Due to the presence of the voltage stabilizing component, the influence of the change of the water source pressure on the water purification device is reduced. The purified water flow rate filtered by the fine filtration component under different powers or duty cycles of the booster pump is relatively stable and can be obtained through prior experiments. Similarly, the hot water flow rate of the hot water outlet waterway under different powers or duty cycles of the water pump is also relatively stable and can be obtained through prior experiments. Therefore, the flow rate of the normal temperature water output by the normal temperature water outlet waterway and the flow rate of the hot water output by the hot water outlet waterway have a smaller deviation from the corresponding theoretical values, and the deviation between the temperature of the mixed water formed by the two and the temperature of the water required by the user is also smaller. By the above method, the problem that the outlet water temperature after mixing the normal temperature water output by the normal temperature water outlet waterway and the hot water output by the hot water outlet waterway is inaccurate is solved, and the user experience is improved. Description of the Drawings

[0041] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present utility model in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present utility model, rather than specifically limiting the shapes and proportional dimensions of the components of the present utility model. Those skilled in the art can, under the teaching of the present utility model, select various possible shapes and proportional dimensions according to specific circumstances to implement the present utility model.

[0042] Figure 1 It is a schematic structural diagram of the water purification device in the first implementation manner in the embodiment of the present utility model;

[0043] Figure 2 It is a schematic structural diagram of the water purification device in the second implementation manner in the embodiment of the present utility model;

[0044] Figure 3 This is a schematic structural diagram of the water purification device in the third implementation manner of the embodiment of the present utility model;

[0045] Figure 4 This is a schematic structural diagram of the water purification device in the fourth implementation manner of the embodiment of the present utility model;

[0046] Figure 5 This is a schematic structural diagram of the water purification device in the fifth implementation manner of the embodiment of the present utility model.

[0047] Reference numerals of the above drawings:

[0048] 1. Fine filtration component; 2. Booster pump; 3. First temperature detection component; 4. Flow detection component; 5. Hot water component; 6. Water pump; 7. Second temperature detection component; 8. Control unit; 9. Voltage stabilizing component; 10. First on-off valve; 11. Second on-off valve; 12. Make-up water valve; 13. Inlet valve; 14. Prefiltration component; 15. Post-filtration component; 16. Waste water ratio device; 100. Inlet water circuit; 200. Normal temperature water outlet circuit; 300. Hot water outlet circuit; 400. Waste water discharge circuit. Specific implementation manners

[0049] Combined with the description of the specific implementation manners of the present utility model and the drawings, the details of the present utility model can be understood more clearly. However, the specific implementation manners of the present utility model described herein are only for the purpose of explaining the present utility model and cannot be understood in any way as a limitation of the present utility model. Under the teaching of the present utility model, those skilled in the art can conceive any possible variations based on the present utility model, and these should all be regarded as belonging to the scope of the present utility model.

[0050] In order to solve the problem of inaccurate outlet water temperature caused by unstable water purification flow rate output by the fine filtration component 1 due to water source pressure, a water purification device is proposed in this application, Figure 1 This is a schematic structural diagram of the water purification device in the first implementation manner of the embodiment of the present utility model, Figure 2 This is a schematic structural diagram of the water purification device in the second implementation manner of the embodiment of the present utility model, Figure 3 This is a schematic structural diagram of the water purification device in the third implementation manner of the embodiment of the present utility model, Figure 4 This is a schematic structural diagram of the water purification device in the fourth implementation manner of the embodiment of the present utility model, Figure 5 This is a schematic structural diagram of the water purification device in the fifth implementation manner of the embodiment of the present utility model, as Figures 1 to 5 shown, the water purification device may include: a fine filtration component 1, an inlet water circuit 100 having a booster pump 2 and a voltage stabilizing component 9, a normal temperature water outlet circuit 200, a hot water component 5, a hot water outlet circuit 300, and a water pump 6.

[0051] The fine filtration component 1 is used to filter raw water so as to output purified water for users to drink. The fine filtration component 1 can be any filtration component that meets the requirements in the prior art. It can be a filtration component that discharges waste water during filtration, such as a reverse osmosis membrane filtration component, a nanofiltration membrane filtration component, an ultrafiltration membrane filtration component, etc., or it can be a filtration component that does not discharge waste water during filtration, such as a ceramic filter element.

[0052] The water inlet pipeline 100 is connected to the inlet of the fine filtration component 1, and the upstream of the water inlet pipeline 100 is used to be connected to a water source. A booster pump 2 and a voltage stabilizing component 9 are provided on the water inlet pipeline 100, and the voltage stabilizing component 9 is located upstream of the booster pump 2. The voltage stabilizing component 9 is used to stabilize the pressure of the water source, so that the pressure of the water source is controlled within a preset reasonable range after passing through the voltage stabilizing component 9, thereby avoiding excessive fluctuations in the pressure of the water upstream of the booster pump 2. The booster pump 2 is used to boost the pressure of the water input to the fine filtration component 1, thereby increasing the filtration rate of the fine filtration component 1 and increasing the purified water output. Since the boosting value of the booster pump 2 is controllable, for example, it can be controlled by the power of the booster pump 2 or by the duty cycle of the booster pump 2. Due to the presence of the voltage stabilizing component 9, the purified water flow rate filtered and output by the fine filtration component 1 is relatively stable at different powers or duty cycles of the booster pump 2, and can be obtained in advance. It will not have a large deviation due to changes in the pressure of the water source.

[0053] The normal temperature water outlet pipeline 200 can be connected to the purified water outlet of the fine filtration component 1. The normal temperature water outlet pipeline 200 is used to output the purified water generated by the fine filtration component 1, and the output purified water is normal temperature water. The hot water component 5 can be connected to the purified water outlet of the fine filtration component 1. The hot water outlet pipeline 300 is connected to the outlet of the hot water component 5. The hot water component 5 can heat the purified water flowing out of the purified water outlet of the fine filtration component 1 to form hot water, and the hot water can be output through the hot water outlet pipeline 300 for users to use. In order to make the flow rate of the hot water output by the hot water outlet pipeline 300 controllable to a certain extent, a water pump 6 is provided on the hot water outlet pipeline 300. The water pump 6 is used to drive the hot water of the hot water component 5 to be output through the hot water outlet pipeline 300. Due to the presence of the voltage stabilizing component 9, the purified water flow rate filtered and output by the fine filtration component 1 is relatively stable at different powers or duty cycles of the booster pump 2, and can be obtained through pre-tests. Correspondingly, when the booster pump 2 is at different powers or duty cycles, the hot water flow rate of the hot water outlet pipeline 300 at different powers or duty cycles of the water pump 6 is also relatively stable and can be obtained through pre-tests. Therefore, the flow rate of the normal temperature water output by the normal temperature water outlet pipeline 200 is also relatively stable and determined.

[0054] As feasible, such as Figures 1 to 5As shown, the ends of the hot water outlet water path 300 and the normal temperature water outlet water path 200 may each have their own water outlets, or they may share the same water outlet, that is, the hot water outlet water path 300 and the normal temperature water outlet water path 200 communicate with the same water outlet.

[0055] When the user needs water at a certain temperature between the temperature of the normal temperature water and the temperature of the hot water output by the hot water component 5, the water purification device can control the duty cycle of the booster pump 2 and the duty cycle of the water pump 6 to the values corresponding to the temperature of the water required by the user based on the temperature of the water required by the user, so as to control the flow rate of the normal temperature water output by the normal temperature water outlet water path 200 under the action of the booster pump 2 and the flow rate of the hot water output by the hot water outlet water path 300 under the action of the water pump 6, so that the temperature of the mixed water formed by the two is close to or equal to the temperature of the water required by the user. Due to the presence of the voltage stabilizing component 9, the influence of the change in the water source pressure on the water purification device is reduced. The purified water flow rate filtered and output by the fine filtration component 1 is relatively stable at different powers or duty cycles of the booster pump 2, and can be obtained through pre-tests. Similarly, the hot water flow rate of the hot water outlet water path 300 of the water pump 6 is also relatively stable at different powers or duty cycles, and can be obtained through pre-tests. Therefore, the flow rate of the normal temperature water output by the normal temperature water outlet water path 200 and the flow rate of the hot water of the hot water outlet water path 300 deviate less from the corresponding theoretical values, and the temperature deviation between the mixed water formed by the two and the temperature of the water required by the user is also smaller. By the above method, the problem that the outlet water temperature after mixing the normal temperature water output by the normal temperature water outlet water path 200 and the hot water output by the hot water outlet water path 300 is inaccurate is solved, and the user experience is improved.

[0056] As an option, the voltage stabilizing component 9 can be a pressure reducing valve. The pressure reducing valve can further reduce the water pressure to a lower value. Even if the water pressure changes greatly, the change range value of the water pressure downstream of the pressure reducing valve is greatly reduced. In this way, the raw water pressure of the fine filtration component 1 is mainly controlled by the booster pump 2, and relatively speaking, the purified water flow rate output by the fine filtration component 1 is more stable and controllable at different duty cycles of the booster pump 2.

[0057] As an option, the hot water component 5 can include an instant heating module. The normal temperature water flowing out of the purified water outlet of the fine filtration component 1 can be instantaneously heated by the hot water component 5 to become hot water at a preset temperature, and then be output from the hot water outlet water path 300. The water purification device can output normal temperature water through the normal temperature water outlet water path 200 for the user to use, or can output hot water through the hot water component 5 and the hot water outlet water path 300 for the user to use, or can also output normal temperature water through the normal temperature water outlet water path 200 and output hot water through the hot water component 5 and the hot water outlet water path 300 at the same time, so that the two form mixed water for the user to use.

[0058] As feasible, the hot water assembly 5 includes: a water storage tank that can communicate with the purified water outlet of the fine filtration assembly 1; and a heating element for heating the purified water in the water storage tank. In this way, the purified water stored in the water storage tank can be heated to become hot water for output through the hot water outlet waterway 300. The temperature of the hot water can be a preset temperature or a temperature close to boiling. When water replenishment is required for the water storage tank, the water storage tank can be communicated with the purified water outlet of the fine filtration assembly 1, so that the purified water output by the fine filtration assembly 1 is input into the water storage tank. When the user needs water at a temperature between the temperature of normal temperature water and the temperature of the hot water output by the hot water assembly 5, the water purification device can control the duty cycle of the booster pump 2 and the duty cycle of the water pump 6 to the values corresponding to the temperature of the water required by the user, so as to control the flow rate of the normal temperature water output by the normal temperature water outlet waterway 200 under the action of the booster pump 2 and the flow rate of the hot water output by the water storage tank through the hot water outlet waterway 300 under the action of the water pump 6, so that the temperature of the mixed water formed by the two is close to or equal to the temperature of the water required by the user.

[0059] In other feasible embodiments, the hot water assembly 5 may include: a water storage tank and an instant heating module. An instant heating module is provided on the hot water outlet waterway 300, and the water storage tank stores the normal temperature purified water output by the fine filtration assembly 1. When hot water needs to be output, the instant heating module instantaneously heats the normal temperature purified water output by the water storage tank and then outputs it from the hot water outlet waterway 300 for the user to use.

[0060] As feasible, as Figures 2 to 5 shown, the water purification device includes: a first temperature detection component 3. The first temperature detection component 3 is used to obtain the temperature of the normal temperature water flowing into or out of the fine filtration assembly 1, so as to determine the temperature of the normal temperature water output by the normal temperature water outlet waterway 200. When the fine filtration assembly 1 is a filtration assembly that discharges wastewater during filtration, as Figure 4 and Figure 5 shown, the temperature of the normal temperature water flowing out of the fine filtration assembly 1 can be the temperature of the purified water output by the fine filtration assembly 1 or the temperature of the wastewater discharged by the fine filtration assembly 1. According to specific needs, the first temperature detection component 33 can be arranged on the inlet waterway 100, or on the normal temperature water outlet waterway 200, or on the wastewater discharge waterway 400 connected to the wastewater outlet of the fine filtration assembly 1. A wastewater ratio device 16 is also provided on the wastewater discharge waterway 400.

[0061] As feasible, the water purification device includes: a flow rate detection component 4. The flow rate detection component 4 is used to obtain the flow rate of the normal temperature water flowing out of the purified water outlet of the fine filtration component 1. Here, it should be noted that the flow rate detection component 4 can directly obtain the flow rate of the normal temperature water flowing out of the purified water outlet of the fine filtration component 1, or indirectly obtain the flow rate of the normal temperature water flowing out of the purified water outlet of the fine filtration component 1 through other data. For example, when the fine filtration component 1 discharges waste water during water filtration, as Figure 5 shown, the flow rate detection component 4 is used to detect the flow rate of the raw water flowing into the fine filtration component 1 and / or the flow rate of the waste water discharged by the fine filtration component 1, so as to obtain the flow rate of the normal temperature water flowing out of the purified water outlet of the fine filtration component 1. The flow rate of the normal temperature water flowing out of the purified water outlet of the fine filtration component 1 can be obtained by subtracting the flow rate of the waste water discharged by the fine filtration component 1 from the flow rate of the raw water flowing into the fine filtration component 1. Alternatively, according to the ratio of the waste water discharged by the fine filtration component 1 to the inflowing raw water, or the ratio of the purified water output by the fine filtration component 1 to the inflowing raw water, or the ratio of the purified water output by the fine filtration component 1 to the waste water discharged by the fine filtration component 1, the flow rate of the normal temperature water flowing out of the purified water outlet of the fine filtration component 1 is calculated through the flow rate of the raw water flowing into the fine filtration component 1 or the flow rate of the waste water discharged by the fine filtration component 1.

[0062] In a feasible implementation manner, the water purification device may include: a second temperature detection component 7. The second temperature detection component 7 is used to detect the temperature of the hot water in the water storage tank or the temperature of the hot water flowing out of the water storage tank. In another feasible implementation manner, the preset temperature of the hot water in the water storage tank or the temperature of the hot water flowing out of the water storage tank is stored in the water purification device. In this way, the second temperature detection component 7 may not be required. Of course, the water purification device may also include the second temperature detection component 7 and store the preset temperature of the hot water in the water storage tank or the temperature of the hot water flowing out of the water storage tank at the same time.

[0063] The control unit 8 may be electrically connected to the booster pump 2, the first temperature detection component 3, the flow rate detection component 4, and the water pump 6. When the water purification device includes the second temperature detection component 7, the control unit 8 may be electrically connected to the second temperature detection component 7. The control unit 8 is used to obtain the temperature of the water required by the user. In a feasible implementation manner, the corresponding relationship between the preset mixed water temperature output and the duty cycle of the booster pump 2 and the duty cycle of the water pump 6 may be stored in the water purification device. In other feasible implementation manners, the water purifier may be connected to the network, so that the corresponding relationship between the preset mixed water temperature output and the duty cycle of the booster pump 2 and the duty cycle of the water pump 6 can be received from the server.

[0064] As feasible, the water purification device may have a first state. In the first state, the control unit 8 controls the duty ratios of the booster pump 2 and the water pump 6 according to the corresponding relationship between the preset output mixed water temperature and the duty ratios of the booster pump 2 and the water pump 6 according to the temperature of the water required by the user, so that the normal temperature water outlet waterway 200 outputs normal temperature water under the action of the booster pump 2, and the hot water outlet waterway 300 outputs hot water under the action of the water pump 6. At this time, the normal temperature water output by the normal temperature water outlet waterway 200 and the hot water output by the hot water outlet waterway 300 under the action of the water pump 6 are approximately the same as the temperature of the water required by the user after mixing, but there may be a small deviation. This is because even with the presence of the pressure stabilizing component 9, the possible changes in the pressure of the water source still result in a small deviation between the purified water flow output by the fine filtration component 1 and the theoretical flow of the normal temperature water corresponding to the duty ratio of the booster pump 2. In addition, the influence of the temperature of the normal temperature water and the temperature of the hot water is not considered in the corresponding relationship between the preset output mixed water temperature and the duty ratios of the booster pump 2 and the water pump 6. Therefore, there is a small deviation between the temperature after mixing and the temperature of the water required by the user. For example, in the corresponding relationship between the preset output mixed water temperature and the duty ratios of the booster pump 2 and the water pump 6, the temperature of the normal temperature water is determined at a certain fixed temperature, such as degrees Celsius, and the temperature of the hot water is determined at a certain fixed temperature, such as 98 degrees. In this way, the corresponding relationship between the preset output mixed water temperature and the duty ratios of the booster pump 2 and the water pump 6 is obtained through a large number of tests.

[0065] The corresponding relationship between the preset output mixed water temperature and the duty ratios of the booster pump 2 and the water pump 6 may be: the corresponding relationship between the output mixed water temperature and the duty ratios of the booster pump 2 and the water pump 6 measured under a fixed preset pressure of the raw water entering the fine filtration component 1. Further, the corresponding relationship between the preset output mixed water temperature, the temperature of the normal temperature water, the temperature of the hot water and the duty ratios of the booster pump 2 and the water pump 6 may be: the corresponding relationship between the output mixed water temperature measured under a fixed preset pressure of the raw water entering the fine filtration component 1 and a fixed preset temperature of the raw water entering the fine filtration component 1 and the duty ratios of the booster pump 2 and the water pump 6. It is precisely because the corresponding relationship between the preset output mixed water temperature and the duty ratios of the booster pump 2 and the water pump 6 is the corresponding relationship between the output mixed water temperature and the duty ratios of the booster pump 2 and the water pump 6 measured under a fixed preset pressure of the raw water entering the fine filtration component 1. Therefore, when obtaining the corresponding relationship through a large number of tests, the pressure of the raw water of the fine filtration component 1 is probably different from the pressure of the raw water of the fine filtration component 1 when the user uses the water purifier (the uncertain changing pressure of the water source plus the pressure stabilizing effect of the pressure stabilizing component 9 plus the boosting of the booster pump 2), and there is a certain difference.

[0066] In other feasible embodiments, the corresponding relationship between the preset mixed water temperature of the output and the duty ratios of the booster pump 2 and the water pump 6 can be: the corresponding relationship between the mixed water temperature of the output, the temperature of the normal temperature water, and the duty ratios of the booster pump 2 and the water pump 6 measured under the condition that the pressure of the raw water entering the fine filtration component 1 is a fixed preset pressure and the temperature of the raw water entering the fine filtration component 1 is different temperatures. That is to say, the corresponding relationship is the corresponding relationship between the preset mixed water temperature of the output, the temperature of the normal temperature water, and the duty ratios of the booster pump 2 and the water pump 6. At this time, based on the temperature of the water required by the user and the temperature of the normal temperature water, the duty ratios of the booster pump 2 and the water pump 6 are controlled through the corresponding relationship between the preset mixed water temperature of the output, the temperature of the normal temperature water, and the duty ratios of the booster pump 2 and the water pump 6, so that the normal temperature water is output from the normal temperature water outlet water path 200 under the action of the booster pump 2, and the hot water is output from the hot water outlet water path 300 under the action of the water pump 6. Since the temperature of the hot water can be a certain set fixed temperature, in this embodiment, the deviation of the outlet water temperature after mixing the normal temperature water output from the normal temperature water outlet water path 200 and the hot water output from the hot water outlet water path 300 from the temperature of the water required by the user is a little smaller.

[0067] In the first state, the water purification device can make the normal temperature water be output from the normal temperature water outlet water path 200 under the action of the booster pump 2, so that the flow detection component 4 can obtain the flow rate of the normal temperature water flowing out of the water purification outlet of the fine filtration component 1, so as to further adjust the duty ratio of the booster pump 2 and / or the duty ratio of the water pump 6 later.

[0068] As feasible, the water purification device has a second state. In the first feasible embodiment, in the second state, the control unit 8 adjusts the duty ratio of the booster pump 2 according to the temperature of the water required by the user, the duty ratio of the water pump 6, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water, so that the temperature after mixing the normal temperature water output from the normal temperature water outlet water path 200 and the hot water output from the hot water outlet water path 300 is closer to or equal to the temperature of the water required by the user. The water purification device executes the second state after executing the first state.

[0069] In the second feasible embodiment, in the second state, the control unit 8 adjusts the duty ratio of the water pump 6 according to the temperature of the water required by the user, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water, so as to control the heat of the hot water output from the hot water outlet water path 300 under the action of the water pump 6, so that the temperature after mixing the normal temperature water output from the normal temperature water outlet water path 200 and the hot water output from the hot water outlet water path 300 is closer to or equal to the temperature of the water required by the user. Similarly, the water purification device executes the second state after executing the first state.

[0070] For two different implementation manners in the second state, the difference lies in that one is to further control and adjust the duty ratio of the booster pump 2, and the other is to control and adjust the duty ratio of the water pump 6. Through the second state, after detecting the flow rate of the normal temperature water, the duty ratio of the booster pump 2 and / or the duty ratio of the water pump 6 are further adjusted by using the flow rate of the normal temperature water, the temperature of the water required by the user, the duty ratio of the water pump 6, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water, so that the temperature of the mixture of the normal temperature water output from the normal temperature water outlet waterway 200 and the hot water output from the hot water outlet waterway 300 is closer to or equal to the temperature of the water required by the user.

[0071] In the first feasible implementation manner in the second state, the theoretical flow rate of the normal temperature water can be calculated by using the temperature of the water required by the user, the duty ratio of the water pump 6, the temperature of the normal temperature water, and the temperature of the hot water. Then, the duty ratio of the booster pump 2 can be adjusted until the flow rate of the normal temperature water reaches or approaches the theoretical flow rate of the normal temperature water.

[0072] When the duty ratio of the water pump 6 is known, the theoretically output flow rate of the water pump 6 can be obtained through conversion. Since the water pump 6 outputs the hot water in the water storage tank and there is no pressure fluctuation, the theoretically output flow rate of the water pump 6 obtained through conversion is relatively accurate. Specifically, the flow rate of the hot water corresponding to the duty ratio of the water pump 6 can be obtained through the corresponding relationship between the duty ratio of the water pump 6 and the theoretically output flow rate of the water pump 6 by using the duty ratio of the water pump 6. Then, the theoretical flow rate of the normal temperature water can be calculated by using the temperature of the water required by the user, the flow rate of the hot water, the temperature of the normal temperature water, and the temperature of the hot water. That is:

[0073] t 用户需求的水的温度 ╳(q 热水的流量 +q 常温水的理论流量 )=q 热水的流量 ╳t 热水的温度 +q 常温水的理论流量 ╳t 常温水的温度 。

[0074] After knowing the theoretical flow rate of the normal temperature water, the duty ratio of the booster pump 2 can be adjusted until the flow rate of the normal temperature water reaches or approaches the theoretical flow rate of the normal temperature water.

[0075] In the first feasible implementation manner in the second state, since the flow rate of the normal temperature water can be detected in real time, the duty ratio of the booster pump 2 can be continuously adjusted until the flow rate of the normal temperature water reaches or approaches the theoretical flow rate of the normal temperature water. In this way, in the second state, the temperature of the mixture of the normal temperature water output from the normal temperature water outlet waterway 200 and the hot water output from the hot water outlet waterway 300 is closer to or equal to the temperature of the water required by the user.

[0076] In the second feasible implementation mode in the second state, the theoretical flow rate of the hot water can be obtained from the temperature of the water required by the user, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water. Then, the duty cycle of the water pump 6 is adjusted according to the theoretical flow rate of the hot water so that the flow rate of the hot water reaches or approaches the theoretical flow rate of the hot water.

[0077] After detecting the flow rate of the normal temperature water in the first state, the theoretical flow rate of the hot water can be obtained. Then, according to the correspondence between the duty cycle of the water pump 6 and the flow rate theoretically output by the water pump 6, the theoretical duty cycle of the water pump 6 can be obtained from the theoretical flow rate of the hot water. Finally, the duty cycle of the water pump 6 is adjusted to the theoretical duty cycle of the water pump 6. Since the water pump 6 outputs the hot water in the storage tank and there is no pressure fluctuation, the process of obtaining the theoretical duty cycle of the water pump 6 from the theoretical flow rate of the hot water according to the correspondence between the duty cycle of the water pump 6 and the flow rate theoretically output by the water pump 6 is relatively accurate. In this way, in the second state, the temperature of the mixture of the normal temperature water output from the normal temperature water outlet waterway 200 and the hot water output from the hot water outlet waterway 300 can be closer to or equal to the temperature of the water required by the user.

[0078] In the above two feasible implementation modes, the preset correspondence between the duty cycle of the water pump 6 and the flow rate of the water theoretically output by the water pump 6 can be stored in the water purifier.

[0079] As feasible, as Figures 3 to 5 shown, a first on-off valve 10 is provided on the hot water outlet waterway 300. As feasible, the water purification device can have a third state. In the third state, the first on-off valve 10 is in the off state. In the third state, the control unit 8 controls the booster pump 2 to be in the on state and the water pump 6 to be in the off state according to the temperature of the water required by the user. In the third state, the water purification device only needs to output the normal temperature water output by the fine filtration component 1.

[0080] As feasible, a second on-off valve 11 is provided on the above-mentioned normal temperature water outlet waterway 200. The water purification device can have a fourth state. In the fourth state, the second on-off valve 11 is in the off state. In the fourth state, the control unit 8 controls the booster pump 2 to be in the off state, the normal temperature water outlet waterway 200 is in the non-water output state, and the water pump 6 is in the on state. In the fourth state, the water purification device only needs to output the hot water output from the storage tank.

[0081] As feasible, as Figures 3 to 5As shown, a makeup water valve 12 is provided between the inlet of the water storage tank and the purified water outlet of the fine filtration assembly 1. When makeup water is required for the water storage tank, the makeup water valve 12 is opened. An inlet valve 13 may be provided at the uppermost upstream of the water inlet waterway 100, and the on-off between the water inlet waterway 100 and the water source can be controlled through the inlet valve 13. A pre-filter assembly 14 may be provided on the water inlet waterway 100 upstream of the fine filtration assembly 1, and a post-filter assembly 15 may be connected downstream of the purified water outlet of the fine filtration assembly 1. The pre-filter assembly 14 may adopt any pre-filter assembly 14 that meets the requirements in the prior art, and no limitation is imposed on it in this application. Similarly, the post-filter assembly 15 may adopt any post-filter assembly 15 that meets the requirements in the prior art, and no limitation is imposed on it in this application. Further, the pre-filter assembly 14 may adopt a composite filter element. The post-filter assembly 15 may adopt a composite filter element. Or, the post-filter assembly 15 may form a composite filter element with the fine filtration assembly 1.

[0082] As feasible, the first state of the water purification device may include a first sub-state of the first state. In the first sub-state of the first state, the temperature of the water required by the user satisfies the first preset temperature range, and the duty ratio of the booster pump 2 is 100%. The first preset temperature range can be understood as a relatively low temperature range. It is necessary to directly set the duty ratio of the booster pump 2 to 100%, so as to make the fine filtration assembly 1 output a relatively large flow of normal temperature water as much as possible, so that the mixing temperature of hot water and normal temperature water is lower, and thus the mixing temperature of hot water and normal temperature water can reach the temperature of the water required by the user as much as possible.

[0083] After the water purification device executes the first sub-state of the first state, in the later stage, the water purification device can preferably execute the second feasible implementation manner of the second state. Such an adjustment method is more accurate.

[0084] As feasible, the first state of the water purification device includes a second sub-state of the first state. In the second sub-state of the first state, the temperature of the water required by the user satisfies the second preset temperature range, and the duty ratio of the booster pump 2 is 0%. The minimum value of the second preset temperature range is greater than the maximum value of the first preset temperature range. The second preset temperature range can be understood as a relatively high temperature range. It is necessary to set the duty ratio of the booster pump 2 to 0%, so as to make the fine filtration assembly 1 output a relatively small flow of normal temperature water as much as possible (even if the booster pump 2 is turned off, the fine filtration assembly 1 will output a certain flow of normal temperature water under the pressure of the water source), so that the mixing temperature of hot water and normal temperature water is higher, and thus the mixing temperature of hot water and normal temperature water can reach the temperature of the water required by the user as much as possible.

[0085] Since the second preset temperature range is a temperature range with a relatively high temperature, it is feasible that when the temperature of the water required by the user exceeds a certain value in the second preset temperature range, in the second sub-state of the first state, the duty ratio of the water pump 6 can directly be 100%, so that the mixed water temperature of the hot water and the normal temperature water reaches the maximum. Since even when the booster pump 2 is closed, the fine filtration component 1 will output a certain flow rate of normal temperature water under the pressure of the water source, and the flow rate of this normal temperature water cannot be reduced, so the mixed water cannot reach a temperature range slightly lower than the hot water temperature in the water storage tank. For example, if the temperature of the hot water is determined at a certain fixed temperature, such as 98 degrees Celsius, since even when the booster pump 2 is closed, the fine filtration component 1 will output a certain flow rate of normal temperature water under the pressure of the water source, the maximum temperature of the mixed water may be 85 degrees Celsius. In this way, the mixed water with a temperature between 85 degrees and 98 degrees cannot be achieved.

[0086] After the water purification device executes the second sub-state of the first state, in the later stage, the water purification device can preferably execute the second feasible implementation manner of the second state. Such an adjustment method is more accurate.

[0087] As feasible, the first state of the water purification device may include a third sub-state of the first state. In the third sub-state of the first state, the temperature of the water required by the user satisfies the third preset temperature range, the duty ratio of the water pump 6 is greater than 0 and less than 100%, the duty ratio of the booster pump 2 is greater than 0 and less than 100%, the minimum value of the third preset temperature range is greater than the maximum value of the first preset temperature range, and the maximum value of the third preset temperature range is less than the minimum value of the second preset temperature range. Through this state, the mixed water temperature of the hot water and the normal temperature water can be made to reach the temperature of the water required by the user as much as possible.

[0088] After the water purification device executes the third sub-state of the first state, in the later stage, the water purification device can preferably select to execute the first feasible implementation manner of the second state. Such an adjustment method is more accurate. Of course, in other feasible implementation manners, in the later stage, the water purification device can also select to execute the second feasible implementation manner of the second state.

[0089] As feasible, when the water purification device is in the second sub-state of the first state, the second on-off valve 11 can be in the open state, and the first on-off valve 10 can be in the open state.

[0090] In the water purification device of the present application, in the first state, the normal temperature water outlet waterway 200 can output normal temperature water under the action of the booster pump 2, and the hot water outlet waterway 300 can output hot water under the action of the water pump 6 to form mixed water at the temperature required by the customer. Further, the water purification device in the present application can also cooperate with the first state and the second state, so that the normal temperature water outlet waterway 200 outputs normal temperature water under the action of the booster pump 2, and the hot water outlet waterway 300 outputs hot water under the action of the water pump 6 to form mixed water at the temperature required by the customer. At this time, the temperature of the mixed water is closer to or equal to the temperature of the water required by the user. Secondly, in the first state, there can be multiple different sub-states, and the water purification device can select a corresponding sub-state in the first state according to the temperature of the water required by the user.

[0091] In addition, when the voltage stabilizing component 9 is a pressure reducing valve, the raw water pressure of the fine filtration component 1 can be reduced compared to the original. Thus, the maximum upper limit value of the outlet temperature of the mixed water (the water mixed by the normal temperature water output by the normal temperature water outlet waterway 200 and the hot water output by the hot water outlet waterway 300) output by the water purifier can be closer to the temperature of the hot water in the water storage tank. Since when the water purifier outputs mixed water, even if the duty ratio of the booster pump 2 is controlled to 0%, if there is no pressure reducing valve, the raw water pressure of the fine filtration component 1 is equal to the pressure of the water source. The greater the raw water pressure of the fine filtration component 1, the greater the purified water flow rate it outputs, which will make the maximum upper limit value of the outlet temperature of the mixed water output by the water purifier further away from the temperature of the hot water in the water storage tank. If there is a pressure reducing valve, the raw water pressure of the fine filtration component 1 is equal to the pressure of the water source minus the pressure value reduced by the pressure reducing valve. In this way, the purified water flow rate output by the fine filtration component 1 will decrease, so that the maximum upper limit value of the outlet temperature of the mixed water output by the water purifier is closer to the temperature of the hot water in the water storage tank. For example, assuming that the temperature of the hot water in the water storage tank is 98 degrees Celsius, if there is no pressure reducing valve, the maximum upper limit value of the outlet temperature of the mixed water output by the water purifier is 75 degrees Celsius. If there is a pressure reducing valve, the maximum upper limit value of the outlet temperature of the mixed water output by the water purifier can be increased to 80 degrees Celsius or even higher.

[0092] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of" in describing a combination shall include the identified elements, ingredients, components or steps and other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe the combinations of elements, ingredients, components or steps herein also contemplates embodiments consisting essentially of these elements, ingredients, components or steps. By using the term "may" herein, it is intended that any attribute described as "may" include be optional. A plurality of elements, ingredients, components or steps can be provided by a single integrated element, ingredient, component or step. Alternatively, a single integrated element, ingredient, component or step can be divided into separate multiple elements, ingredients, components or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step does not mean to exclude other elements, ingredients, components or steps.

[0093] Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A water purification device, characterized in that, The water purification device includes: A fine filtration component; An inlet water path with a booster pump and a pressure stabilizing component, the inlet water path being communicated with the inlet of the fine filtration component, and the pressure stabilizing component being located upstream of the booster pump; A normal temperature water outlet water path, the normal temperature water outlet water path being capable of being communicated with the purified water outlet of the fine filtration component; A hot water component, the hot water component being capable of being communicated with the purified water outlet of the fine filtration component; A hot water outlet water path, the hot water outlet water path being communicated with the outlet of the hot water component; A water pump arranged on the hot water outlet water path, the water pump being used for driving the hot water of the hot water component to be output through the hot water outlet water path.

2. The water purification device according to claim 1, characterized in that, The pressure stabilizing component includes a pressure reducing valve.

3. The water purification device according to claim 1, characterized in that, The hot water component includes an instant heating module.

4. The water purification device according to claim 1, characterized in that The hot water component includes: a water storage tank, the water storage tank being capable of being communicated with the purified water outlet of the fine filtration component; a heating element for heating the purified water in the water storage tank.

5. The water purification device according to claim 4, characterized in that, The water purification device includes: A first temperature detection component, the first temperature detection component being used for obtaining the temperature of the normal temperature water flowing into or out of the fine filtration component; A flow rate detection component, the flow rate detection component being used for obtaining the flow rate of the normal temperature water flowing out of the purified water outlet of the fine filtration component; A second temperature detection component for detecting the temperature of the hot water in the water storage tank or the temperature of the hot water flowing out of the water storage tank; or, the preset temperature of the hot water in the water storage tank or the temperature of the hot water flowing out of the water storage tank is stored in the water purification device.

6. The water purification device according to claim 5, characterized in that The corresponding relationship between the preset mixed water temperature of the output, the duty ratio of the booster pump, and the duty ratio of the water pump is stored in the water purification device; A control unit, the control unit being electrically connected to the first temperature detection component and the flow rate detection component, and when the water purification device has the second temperature detection component, the control unit is also electrically connected to the second temperature detection component; The water purification device has a first state. In the first state, the control unit controls the duty ratio of the booster pump and the duty ratio of the water pump according to the corresponding relationship between the preset mixed water temperature of the output, the duty ratio of the booster pump, and the duty ratio of the water pump according to the temperature of the water required by the user, so that the normal temperature water is output from the normal temperature water outlet water path under the action of the booster pump, and the hot water is output from the hot water outlet water path under the action of the water pump.

7. The water purification device according to claim 6, characterized in that, The water purification device has a second state. In the second state, the control unit adjusts the duty ratio of the booster pump according to the temperature of the water required by the user, the duty ratio of the water pump, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water, so that the temperature of the mixture of the normal temperature water output from the normal temperature water outlet water path and the hot water output from the hot water outlet water path is closer to or equal to the temperature of the water required by the user; the water purification device executes the second state after executing the first state.

8. The water purification device according to claim 6, characterized in that, The water purification device has a second state. In the second state, the control unit adjusts the duty ratio of the water pump according to the temperature of the water demanded by the user, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water, so as to control the heat quantity of the hot water output from the hot water outlet water path under the action of the water pump, so that the temperature of the mixture of the normal temperature water output from the normal temperature water outlet water path and the hot water output from the hot water outlet water path is closer to or equal to the temperature of the water demanded by the user; the water purification device executes the second state after executing the first state.

9. The water purification device according to claim 6, characterized in that The water purification device has a third state. In the third state, the control unit controls the booster pump to be in the on state and the water pump to be in the off state according to the temperature of the water demanded by the user.

10. The water purification device according to claim 9, characterized in that, A first on-off valve is arranged on the hot water outlet water path. In the third state, the first on-off valve is in the off state.

11. The water purification device according to claim 6, characterized in that, The water purification device has a fourth state. In the fourth state, the control unit controls the booster pump to be in the off state, the normal temperature water outlet water path to be in a non-water output state, and the water pump to be in the on state according to the temperature of the water demanded by the user.

12. The water purification device according to claim 11, wherein, A second on-off valve is arranged on the normal temperature water outlet water path. In the fourth state, the second on-off valve is in the off state.

13. The water purification device according to claim 6, characterized in that, The corresponding relationship between the preset mixed water temperature output and the duty ratio of the booster pump and the duty ratio of the water pump is: the corresponding relationship between the mixed water temperature output measured under a fixed preset pressure of the raw water entering the fine filtration component and the duty ratio of the booster pump and the duty ratio of the water pump; Or, The corresponding relationship between the preset mixed water temperature output, the temperature of the normal temperature water, the temperature of the hot water and the duty ratio of the booster pump and the duty ratio of the water pump is: the corresponding relationship between the mixed water temperature output measured under a fixed preset pressure of the raw water entering the fine filtration component and at a fixed preset temperature of the raw water entering the fine filtration component and the duty ratio of the booster pump and the duty ratio of the water pump.

14. The water purification device according to claim 6, characterized in that, The first state includes a first sub-state of the first state. In the first sub-state of the first state, the temperature of the water demanded by the user satisfies the first preset temperature range, and the duty ratio of the booster pump is 100%.

15. The water purification device according to claim 14, characterized in that, The first state includes a second sub-state of the first state. In the second sub-state of the first state, the temperature of the water demanded by the user satisfies the second preset temperature range, the duty ratio of the booster pump is 0%, and the minimum value of the second preset temperature range is greater than the maximum value of the first preset temperature range.

16. The water purification device according to claim 15, characterized in that, In the second sub-state of the first state, the duty ratio of the water pump is 100%.

17. The water purification device according to claim 15, characterized in that, The first state includes a third sub-state of the first state. In the third sub-state of the first state, the temperature of the water required by the user satisfies a third preset temperature range. The duty cycle of the water pump is greater than 0 and less than 100%, and the duty cycle of the booster pump is greater than 0 and less than 100%. The minimum value of the third preset temperature range is greater than the maximum value of the first preset temperature range, and the maximum value of the third preset temperature range is less than the minimum value of the second preset temperature range.

18. The water purification device according to claim 14, characterized in that, The water purification device has a second state, and the second state includes a first sub-state of the second state. In the first sub-state of the second state, the temperature of the water required by the user satisfies a first preset temperature range, and the control unit adjusts the duty cycle of the water pump according to the temperature of the water required by the user, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water.

19. The water purification device according to claim 15, wherein The water purification device has a second state, and the second state includes a second sub-state of the second state. In the second sub-state of the second state, when the temperature of the water required by the user satisfies a second preset temperature range, the control unit adjusts the duty cycle of the water pump according to the temperature of the water required by the user, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water.

20. The water purification device according to claim 17, characterized in that, The water purification device has a second state, and the second state includes a third sub-state of the second state. In the third sub-state of the second state, the temperature of the water required by the user satisfies a third preset temperature range, and the control unit adjusts the duty cycle of the booster pump according to the temperature of the water required by the user, the duty cycle of the water pump, the flow rate of the normal temperature water, the temperature of the normal temperature water, and the temperature of the hot water.

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