Water purifier and control method of water purifier

Abstract

The application provides a water purifier and a control method of the water purifier. The water purifier comprises a main water pipeline, a booster pump and a reverse osmosis filter element arranged on the main water pipeline, and a water storage device comprising a power cavity and a water storage cavity. The water storage cavity is communicated with a pure water outlet of the reverse osmosis filter element through an inlet pipeline, and is also communicated with a raw water outlet of the reverse osmosis filter element through an outlet pipeline. The water purifier further comprises a controller, which is used for automatically or according to a first electric signal from a water storage starting control device to control the booster pump to start, and automatically or according to a second electric signal from a water storage ending control device to control the booster pump to stop working. The water purifier can reduce the TDS value of the first cup of water taken by the user next time, and can also avoid the breeding of bacteria in the reverse osmosis filter element. The water pipeline of the water purifier is relatively simple, and the risk of water leakage is small. The control logic is also relatively simple, and the reliability is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water purification, in particular to a water purifier and a control method of the water purifier. BACKGROUND

[0002] With the pursuit of the public for the quality of life, the level of water quality begins to be concerned. Reverse osmosis water purifier is becoming more and more popular because of its fresh, healthier and safer purified water.

[0003] The raw water has a high TDS (total dissolved solids), and the reverse osmosis filter core can block a large number of ions in the raw water in front of the permeation membrane under the action of the booster pump, so that the TDS of the water passing through the permeation membrane meets the standard of direct drinking water. However, after the water is prepared, a small amount of concentrated water in the reverse osmosis filter core will still remain in front of the permeation membrane. After a long time of shutdown, according to the principle of ion diffusion from high concentration solution to low concentration solution, the ions in the concentrated water in front of the membrane will diffuse to the purified direct drinking water behind the membrane, thereby polluting the purified direct drinking water. When the next water is taken, the contaminated direct drinking water will flow out together with the newly prepared direct drinking water, so that the TDS of the first section of water taken by the user is higher than the standard value.

[0004] In order to solve this problem, the prior art sets a backflow water path between the pure water outlet of the reverse osmosis filter core and the water inlet of the booster pump, and sets a plurality of water path control devices such as valves in the backflow water path to control the communication of the water path. After the user stops taking water, the pressure in the booster pump is used to squeeze the pure water out of the reverse osmosis filter core and backflow to the upstream of the booster pump, so as to flush and soak the booster pump and the reverse osmosis filter core. Thus, the TDS value of the first section of water taken by the water purifier after a long time of standby is reduced.

[0005] However, the water path structure of the water purifier is complex, the interfaces in the water path are numerous, and the risk of water leakage is great; a plurality of control devices on the water path need to be controlled, and the control logic is also complex, which is prone to errors. SUMMARY

[0006] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present application, a water purifier is provided, comprising a main water pipeline, the main water pipeline being connected to a water inlet and a water outlet of the water purifier, a booster pump and a reverse osmosis filter element being arranged in sequence on the main water pipeline according to the water flow direction, the water purifier further comprising a water storage device, the water storage device comprising a power cavity and a water storage cavity, the total volume of the power cavity and the water storage cavity being fixed and unchangeable, and the volume ratio of each cavity being changeable according to the water pressure in the cavity; the water storage cavity is connected to a pure water outlet of the reverse osmosis filter element through an inlet pipeline, and is further connected to a raw water outlet of the reverse osmosis filter element through an outlet pipeline, a first check valve being arranged on the outlet pipeline, the connection direction of the first check valve being from the water storage cavity to the raw water outlet; the water purifier further comprises a controller, the controller being electrically connected to the booster pump, and the controller being configured to automatically control the booster pump to start or stop working according to a first electric signal from a water storage start control device or a second electric signal from a water storage end control device.

[0007] The water purifier with the above structure can automatically control the booster pump to start after standby, or control the booster pump to start according to the first electric signal from the water storage start control device, and the reverse osmosis filter element fills pure water into the water storage device, which washes and soaks the reverse osmosis filter element. The TDS value of the pure water side of the reverse osmosis filter element is increased due to the diffusion phenomenon after the water purifier is in standby for a long time, thereby reducing the TDS value of the first cup of water taken by the user next time. Even after washing, bacteria will be produced in the static water body for a long time, which is not conducive to drinking. The booster pump is started intermittently to wash the reverse osmosis filter element, which can also avoid the growth of bacteria in the reverse osmosis filter element. The water storage device is arranged in the water purifier to achieve the above purpose, the water circuit is simple, the risk of water leakage is small, and the control logic is also relatively simple, thereby improving the reliability.

[0008] For example, the controller automatically controls the booster pump to start by the following operation: starting to perform a first timing operation when the water purifier enters the standby state, and controlling the booster pump to start every first time threshold value when the time counted by the first timing operation reaches the first time threshold value; and / or the controller automatically controls the booster pump to stop working by the following operation: starting to perform a second timing operation when the water purifier is in the standby state, and controlling the booster pump to stop working when the time counted by the second timing operation reaches a second time threshold value.

[0009] The first timing operation and the second timing operation are performed by the controller, so that the automatic starting and stopping of the booster pump can be easily controlled. The booster pump is directly controlled by the controller, so that the control devices in the water purifier can be reduced, and the risk of water leakage and the product cost of the water purifier can be reduced.

[0010] Exemplarily, the water purifier is provided with an operable member on the shell, and the operable member is electrically connected to the controller to serve as the water storage starting control device.

[0011] By providing the operable member as the water storage starting control device, the water purifier can be manually controlled to enter the flushing stage, realizing manual and automatic multiple selection operation.

[0012] Exemplarily, a first flow meter is arranged on the main water pipeline between the booster pump and the reverse osmosis filter element, the water inlet pipeline or the concentrated water pipeline arranged at the concentrated water outlet of the reverse osmosis filter element, and the first flow meter is electrically connected to the controller to serve as the water storage ending control device.

[0013] The first flow meter is used as the water storage ending control device, so that the water storage amount is not affected by water pressure, and the control precision is higher. The water purifier with the first flow meter can not only calculate the water amount flowing into the water storage cavity, but also has other application functions, laying a hardware foundation for the expansion of the functions of the water purifier.

[0014] Exemplarily, the controller is further configured to control the booster pump to start operating according to the start water taking electric signal from the water outlet control device and to control the booster pump to stop operating according to the stop water taking electric signal from the water outlet control device, so that the water purifier enters the standby state.

[0015] The water purifier with the controller can control the state of the water purifier in multiple ways.

[0016] Exemplarily, a second check valve and a high-pressure switch are arranged on the main water pipeline between the pure water outlet and the water taking outlet in sequence according to the water flow direction, the communication direction of the second check valve is from the pure water outlet to the water taking outlet, and the high-pressure switch is electrically connected to the controller to serve as the water outlet control device.

[0017] The water purifier with the arrangement can be connected to a mechanical faucet, and the start and stop of the water purifier can be controlled by the opening and closing of the mechanical faucet, which is simple and feasible and can expand the use range of the water purifier. Moreover, the reverse osmosis filter element can be flushed when the water purifier enters the standby state, the reverse osmosis filter element is soaked in pure water in advance, and the diffusion phenomenon in the reverse osmosis filter element is further slowed down.

[0018] Exemplarily, the water outlet control device is an electric control faucet, and the controller is further configured to be electrically connected to the electric control faucet.

[0019] The water purifier for the external electric control faucet has a simple water pipeline and clear control logic, and is easy to implement.

[0020] Exemplarily, a second flow meter is arranged on the main water pipeline between the booster pump and the reverse osmosis filter element, the water inlet pipeline or the concentrated water pipeline arranged at the concentrated water outlet of the reverse osmosis filter element, and the second flow meter is electrically connected to the controller.

[0021] The water purifier with the second flow meter can flush the reverse osmosis filter core immediately when the water purifier enters the standby state, and the reverse osmosis filter core is soaked in pure water in advance to further slow down the diffusion phenomenon in the reverse osmosis filter core. The second flow meter is used to control the water storage amount of the water storage device, so that the water storage amount is not affected by water pressure, and the control precision is higher. Moreover, the second flow meter not only can calculate the water inflow into the water storage cavity, but also can have other application functions, and lay a hardware foundation for expanding the functions of the water purifier.

[0022] Exemplarily, the water storage device is a pressure tank, and the power cavity includes an air bag.

[0023] The water storage device with the power cavity including the air bag can reduce the water connection of the water storage device, and the power cavity can generate the power to discharge the water in the water storage cavity without being communicated with the water inlet of the water purifier, so that the structure is simple and the connection is more convenient.

[0024] Exemplarily, the power cavity is communicated with the water inlet of the water purifier.

[0025] When the water storage device is used, the pushing force of the power cavity can be kept constant because the power cavity is communicated with the water inlet of the water purifier, so that the water outlet speed of the water storage cavity can be kept constant during the process of discharging the pure water from the water storage cavity, and all the pure water in the water storage cavity can be discharged to avoid the residual pure water in the water storage cavity.

[0026] Exemplarily, the concentrated water port of the reverse osmosis filter core is provided with a concentrated water electromagnetic valve.

[0027] When the water purifier flushes the reverse osmosis filter core, the concentrated water electromagnetic valve is turned on, so that the reverse osmosis filter core can be flushed by the water flow with large flux, the filtering effect of the reverse osmosis filter core is improved, and the service life of the reverse osmosis filter core is prolonged.

[0028] According to another aspect of the present application, a control method of a water purifier is provided, the water purifier comprising a main water pipeline connecting a water inlet and a water outlet of the water purifier, a booster pump and a reverse osmosis filter cartridge arranged in sequence along the water flow direction on the main water pipeline, and a water storage device comprising a power chamber and a water storage chamber, the total volume of the power chamber and the water storage chamber being fixed and the volume ratio of each chamber being changeable according to the water pressure in the chamber; the water storage chamber being connected to a pure water outlet of the reverse osmosis filter cartridge through a water inlet pipeline and to a raw water inlet of the reverse osmosis filter cartridge through a water outlet pipeline, the water outlet pipeline being provided with a first check valve, the connection direction of the first check valve being from the water storage chamber to the raw water inlet; the water purifier further comprising a controller electrically connected to the booster pump; the control method comprising: automatically or according to a first electric signal from a water storage starting control device, controlling the booster pump to start and automatically or according to a second electric signal from a water storage ending control device, controlling the booster pump to stop working during a period when the water purifier is in a standby state.

[0029] Exemplarily, automatically controlling the booster pump to start comprises: starting a first timing operation when the water purifier enters the standby state; and every first time threshold value after the time counted by the first timing operation reaches a first time threshold value, controlling the booster pump to start; and / or automatically controlling the booster pump to stop working comprises: during the period when the water purifier is in the standby state, starting a second timing operation from when the booster pump starts; and when the time counted by the second timing operation reaches a second time threshold value, controlling the booster pump to stop working.

[0030] Exemplarily, a first flow meter is arranged on the main water pipeline between the booster pump and the reverse osmosis filter cartridge, the water inlet pipeline or a concentrated water pipeline arranged at a concentrated water outlet of the reverse osmosis filter cartridge, the first flow meter being electrically connected to the controller to serve as the water storage ending control device; the control method further comprising: during the period when the water purifier is in the standby state, according to a second electric signal from the first flow meter, accumulating a first water volume passed through the first flow meter since the booster pump starts; and when the first water volume reaches a first water volume threshold value, controlling the booster pump to stop working.

[0031] Exemplarily, the control method further comprises: according to a starting water taking electric signal from a water outlet control device, controlling the booster pump to start; and according to a stopping water taking electric signal from the water outlet control device, controlling the booster pump to stop working, so that the water purifier enters the standby state.

[0032] Exemplarily, the water outlet control device is an electrically controlled faucet, the controller is further used for electrically connecting the electrically controlled faucet; according to the stopping water taking electric signal from the water outlet control device, controlling the booster pump to stop working comprises: starting a third timing operation from when the stopping water taking electric signal of the electrically controlled faucet is received; and when the time counted by the third timing operation reaches a third time threshold value, controlling the booster pump to stop working.

[0033] Exemplarily, the water outlet control device is an electric faucet, and the controller is further configured to electrically connect the electric faucet: a second flow meter is arranged on a main water pipeline between the booster pump and the reverse osmosis filter element, a water inlet pipeline, or a concentrated water pipeline arranged at a concentrated water outlet of the reverse osmosis filter element, and the second flow meter is electrically connected to the controller; and the controlling the booster pump to stop working according to the stop water taking electric signal from the water outlet control device comprises: accumulating a second water amount passed through the second flow meter since the stop water taking electric signal of the electric faucet is received; and controlling the booster pump to stop working when the second water amount reaches a second water amount threshold.

[0034] A series of simplified concepts are introduced in the summary, which will be further described in detail in the specific embodiments. The summary part does not mean to try to limit the key features and essential technical features of the claimed technical solutions, nor to try to determine the protection scope of the claimed technical solutions.

[0035] The advantages and features of the present application will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0036] The following drawings of the present application are hereby incorporated as part of the present application for the purpose of understanding the present application. The embodiments of the present application and the description thereof shown in the drawings are used to explain the principles of the present application. In the drawings,

[0037] Figure 1 A water pipeline schematic diagram of a water purifier according to a first exemplary embodiment of the present application;

[0038] Figure 2 A working flow schematic diagram of a water purifier according to an embodiment of the present application;

[0039] Figure 3 A water pipeline schematic diagram of a water purifier according to a second exemplary embodiment of the present application;

[0040] Figure 4 A water pipeline schematic diagram of a water purifier according to a third exemplary embodiment of the present application; and

[0041] Figure 5 A water pipeline schematic diagram of a water purifier according to a fourth exemplary embodiment of the present application.

[0042] Among the above drawings, the following reference signs are included:

[0043] 100, main water pipeline; 101, water inlet; 102, water outlet; 110, booster pump; 120, reverse osmosis filter core; 121, raw water inlet; 122, pure water outlet; 123, concentrated water outlet; 200, water storage device; 210, power cavity; 220, water storage cavity; 230, water inlet pipeline; 240, water outlet pipeline; 250, first check valve; 310, second check valve; 320, high-pressure switch; 510, water inlet electromagnetic valve; 520, concentrated water electromagnetic valve; 530, third check valve; 610, first flow meter; 700, pre-filter core. DETAILED DESCRIPTION

[0044] In the following description, numerous specific details are provided in order to provide a thorough understanding of the present application. One of ordinary skill in the art will realize, however, that the application can be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order not to unnecessarily obscure the present application.

[0045] As shown in Figure 1 The present application provides a water purifier, which comprises a main water pipeline 100, the main water pipeline 100 being connected between a water inlet 101 and a water outlet 102 of the water purifier. The water inlet 101 can be connected to a water source such as a municipal water pipeline, and the water outlet 102 can be connected to a water taking device, which can include a mechanical faucet, an electrically controlled faucet, a pipeline machine, and the like. The main water pipeline 100 is provided with a booster pump 110 and a reverse osmosis filter core 120. The booster pump 110 is used to increase the pressure downstream of the main water pipeline 100, so that water with a certain pressure passes through the reverse osmosis filter core 120, and the reverse osmosis filter core 120 filters the water to produce drinkable direct drinking water. The reverse osmosis filter core 120 is a prior art, and the filtering process of the reverse osmosis filter core 120 is a technical means well known to those skilled in the art, and the specific principle will not be described in detail.

[0046] The water purifier further comprises a water storage device 200. The water storage device 200 comprises a power cavity 210 and a water storage cavity 220. The power cavity 210 and the water storage cavity 220 are not connected to each other and can change their volumes according to the water pressure in the cavities. Specifically, the total volume of the two cavities is fixed and unchangeable. The total volume can be set according to the amount of water required to flush the reverse osmosis filter core 120. Moreover, the two cavities can change their respective volume proportions according to the water pressure in the cavities. The water storage device 200 can be, for example, a water driving device in the prior art.

[0047] The power cavity 210 is used to provide power to discharge the water stored in the water storage cavity 220. Under the extrusion or pushing of the power cavity 210, the water stored in the water storage cavity 220 will be discharged out of the cavity.

[0048] The water storage cavity 220 is provided with a water inlet pipeline 230 and a water outlet pipeline 240. The water inlet pipeline 230 communicates the water storage cavity 220 with the pure water outlet 122 of the reverse osmosis filter core 120, that is, the water stored in the water storage cavity 220 is all the pure water filtered by the reverse osmosis filter core 120. The water outlet pipeline 240 communicates the water storage cavity 220 with the raw water inlet 121 of the reverse osmosis filter core 120. A first check valve 250 is arranged on the water outlet pipeline 240, and the communication direction of the first check valve 250 is from the water storage cavity 220 to the raw water inlet 121.

[0049] The water inlet pipeline 230 and the water outlet pipeline 240 can be two pipelines branched from one water outlet on the water storage cavity 220, or two pipelines respectively communicated by two water outlets on the water storage cavity 220. The above two communication modes do not affect the use.

[0050] The water purifier further comprises a controller. The controller is electrically connected to the booster pump 110. The controller can be used to automatically flush and soak the reverse osmosis filter core 120 with the purified water stored in the storage cavity 220 during the period when the water purifier is in standby state. The standby state refers to the state of the water purifier when it is not making water for the user. The standby state can start from the time when the booster pump 110 stops working after the previous water taking ends, and end at the time when the booster pump 110 starts working for the next water taking. When the water purifier is in standby state, the water taking device is closed. Specifically, the controller can be used to automatically control the booster pump 110 to start working during the period when the water purifier is in standby state. The controller can also be used to automatically control the booster pump 110 to stop working during the period when the water purifier is in standby state. The controller can also be used to control the booster pump 110 to start working according to the first electric signal from the water storage starting control device during the period when the water purifier is in standby state. The water storage starting control device can be used to start the process of storing water in the storage cavity 220. The controller can also be used to control the booster pump 110 to stop working according to the second electric signal from the water storage ending control device during the period when the water purifier is in standby state. The water storage ending control device can be used to terminate the process of storing water in the storage cavity 220. It can be understood that two ways of controlling the booster pump 110 to start working and two ways of controlling the booster pump 110 to stop working are given above. The ways of controlling the booster pump 110 to start and stop working can be combined in any way. For example, the controller can automatically control the booster pump 110 to start and stop working. The controller can first automatically control the booster pump 110 to start working, and then control the booster pump 110 to stop working according to the second electric signal. The controller can first control the booster pump 110 to start working according to the first electric signal, and then automatically control the booster pump 110 to stop working. The controller can first control the booster pump 110 to start working according to the first electric signal, and then control the booster pump 110 to stop working according to the second electric signal. The automatic control of the start and stop of the booster pump 110 can be achieved by using a timer in the controller to control the start and stop of the booster pump 110 by time. The water storage starting control device can be an element arranged on the shell of the water purifier, such as a switch, a button, etc. The water storage ending control device can include a flow meter for detecting the flow in the pipeline or a pressure sensor for detecting the pressure in the pipeline. Details will be described below.

[0051] With the above arrangement of the water purifier, the purified water stored in the storage cavity 220 can be used to flush the raw water side of the reverse osmosis filter core 120 and replace the raw water in the raw water side with purified water when the water purifier is in standby state, so as to achieve the effect of purified water soaking the membrane.

[0052] The specific working process of the water purifier will be described in detail below.

[0053] The user opens the water taking device to take water, and the water purifier produces water. The booster pump 110 starts, the reverse osmosis filter core 120 filters the raw water flowing in, and the pure water is discharged from the water taking opening 102 through the pure water opening 122 of the reverse osmosis filter core 120. Because the power cavity 210 exists, a certain resistance is generated to the water storage cavity 220, so the pure water discharged from the pure water opening 122 will not flow into the water storage cavity 220 to press the power cavity 210, but is completely discharged from the water taking device and is taken by the user. When the user closes the water taking device, the booster pump 110 stops working. The water purifier stops producing water and enters the standby state until the next time the user opens the water taking device.

[0054] During the period when the water purifier is in the standby state, the water purifier can control the booster pump 110 to start and stop by using the controller, so as to store pure water in the water storage cavity 220 of the water storage device 200 and use the pure water in the water storage cavity 220 to flush and soak the reverse osmosis filter core 120.

[0055] In an embodiment, the water purifier can automatically control the booster pump 110 to start and stop by using the controller. When the water purifier enters the standby state, that is, when the user finishes taking water and the booster pump 110 stops working, the controller starts to perform a first timing operation. When the time counted by the first timing operation reaches a first time threshold, the booster pump 110 is controlled to start every first time threshold. According to the occurrence law of the diffusion phenomenon in the reverse osmosis filter core 120, the diffusion phenomenon will reach a peak value about one hour after the reverse osmosis filter core 120 stops producing water, that is, at this time, the ions on the raw water side will move to the pure water side through the reverse osmosis membrane, causing the TDS value on the pure water side to increase. Therefore, the first time threshold can be set to any value between 30 minutes and 60 minutes.

[0056] After the controller controls the booster pump 110 to start, the pure water produced by the reverse osmosis filter core 120 will be filled into the water storage cavity 220 through the water inlet pipeline 230, and the power cavity 210 will be pressed, so that the volume of the power cavity 210 is reduced.

[0057] When the booster pump 110 starts, the controller starts to perform a second timing operation. The working time of the booster pump 110 is timed. When the time counted by the second timing operation reaches a second time threshold, the booster pump 110 stops working. The second time threshold can be calculated according to the volume of the water storage cavity 220 and the displacement of the booster pump 110, that is, after the water storage cavity 220 stores the expected volume of pure water, the booster pump 110 can stop working.

[0058] When the booster pump 110 stops working, the water pressure provided by the booster pump 110 to the water storage cavity 220 disappears. The power cavity 210 extrudes the water storage cavity 220, so that the pure water previously prepared in the water storage cavity 220 flows into the raw water inlet 121 of the reverse osmosis filter core 120 through the water outlet pipeline 240. The pure water replaces the raw water on the raw water side in front of the membrane of the reverse osmosis filter core 120, flushes the reverse osmosis membrane, and makes the reverse osmosis membrane immersed in the pure water.

[0059] Figure 2 The working flow of the water purifier according to the embodiment of the present application is shown in the figure. The time period between two water taking is the standby state period, which can be divided into a flushing stage and a non-flushing stage. The total time length of one non-flushing stage and one flushing stage is the first time threshold. In the last period of the non-flushing stage, the booster pump 110 completes the start and stop operations to store water in the water storage device 200 in the period.

[0060] In the above embodiment, the first timing operation and the second timing operation are performed by the controller, so that the automatic start and stop control of the booster pump 110 can be easily completed. The direct control of the booster pump 110 by the controller can reduce the control device in the water purifier and reduce the risk of water leakage and product cost of the water purifier.

[0061] In another embodiment, an operable part can be arranged on the shell of the water purifier, and the operable part is electrically connected with the controller to serve as the water storage start control device. In other words, by operating the operable part, the user can start the booster pump 110 at any time when the water purifier is in the standby state, fill the pure water into the water storage cavity 220, and flush the raw water side of the reverse osmosis filter core 120 with the pure water in the water storage cavity 220. It can be understood that the stop mode of the booster pump 110 can be completed according to the process of the second timing operation described above or according to the second electric signal.

[0062] By arranging the operable part as the water storage start control device, the water purifier can be manually controlled to enter the flushing stage, realizing manual and automatic multiple selection operations.

[0063] In another embodiment, a first flow meter 610 is arranged on the main water pipeline 100 between the booster pump 110 and the reverse osmosis filter core 120, the water inlet pipeline 230, or the concentrated water pipeline arranged at the concentrated water outlet 123 of the reverse osmosis filter core 120. The first flow meter 610 is electrically connected with the controller to serve as the water storage end control device. In other words, during the process of storing pure water into the water storage cavity 220, the stop of the booster pump 110 can be controlled by the amount of water flowing through the first flow meter 610.

[0064] As Figure 3As shown, the first flow meter 610 can be arranged on the inlet water line 230. The first flow meter 610 can detect the flow rate of the water entering the water storage cavity 220 to generate a second electric signal accordingly. The controller can accumulate the first water volume passing through the first flow meter since the booster pump 110 is started, and when the first water volume reaches the expected volume of the pure water to be filled into the water storage cavity 220, the controller controls the booster pump 110 to stop working. It can be understood that the expected volume of the pure water to be filled into the water storage cavity 220 can be preset as the first water volume threshold. Alternatively, the first flow meter 610 arranged on the main water line 100 and the concentrated water line can also indirectly calculate the volume of the pure water entering the water storage cavity 220 according to the ratio relationship among the raw water, the pure water and the concentrated water of the reverse osmosis filter element 120.

[0065] The first flow meter 610 is used as the water storage end control device, so that the water storage volume is not affected by the water pressure, and the control precision is higher. The water purifier with the first flow meter 610 can not only calculate the water volume flowing into the water storage cavity 220, but also have other application functions, and lay a hardware foundation for the expansion of the functions of the water purifier.

[0066] In summary, the water purifier can automatically or control the booster pump 110 to start according to the first electric signal from the water storage start control device after standby, and the reverse osmosis filter element 120 fills the pure water into the water storage device 200. The pure water flushes and soaks the reverse osmosis filter element 120. It is avoided that the TDS value of the pure water side of the reverse osmosis filter element 120 is increased due to the diffusion phenomenon after the water purifier is in standby for a long time, so that the TDS value of the first cup of water taken by the user in the next time is reduced. Moreover, even after flushing, the long-stagnant water body can also breed bacteria, which is not conducive to drinking. The booster pump 110 is started intermittently to flush the reverse osmosis filter element 120, which can also avoid the breeding of bacteria in the reverse osmosis filter element 120. The water purifier realizes the above-mentioned purposes by arranging the water storage device, the water circuit is simple, the risk of water leakage is small, and the control logic is also relatively simple and has high reliability.

[0067] For example, the power cavity 210 of the water storage device 200 can not only have a structure for providing transmission power, for example, the power cavity 210 can be communicated with the water inlet 101 of the water purifier, but also can have a structure capable of storing energy, for example, a gas bag or a spring element.

[0068] In one embodiment, taking the power cavity 210 communicated with the water inlet 101 of the water purifier as an example, as shown in Figure 4As shown, the user opens the water taking device to take water, the booster pump 110 starts, the reverse osmosis filter core 120 filters, and the purified water is discharged from the water taking port 102 through the purified water port 122. In general, the water inlet port 101 of the water purifier is connected with a water route with pressure, such as a municipal water pipeline, wherein the water pressure can be maintained between 0.1 MPa and 0.6 MPa. At the end of the water taking port 102, since the water taking port 102 is connected with the atmosphere, the pressure of the water taking port 102 will be lower than the pressure of the water inlet port 101. The purified water discharged from the purified water port 122 will not flow into the water storage cavity 220 to press the power cavity 210, but will completely flow out of the water taking device and be taken by the user.

[0069] In the standby state of the water purifier, the booster pump 110 can start according to the conditions described above. Since the pressure generated by the booster pump 110 during operation is much higher than the pressure of the water inlet port 101 of the water purifier. At this time, the purified water prepared by the reverse osmosis filter core 120 will be filled into the water storage cavity 220 through the water inlet pipeline 230, and the raw water in the power cavity 210 will be discharged. The discharged raw water can flow into the water inlet of the booster pump 110 for cyclic filtration.

[0070] After the expected volume of purified water is filled into the water storage cavity 220, the booster pump 110 stops working. At this time, the pressure provided by the booster pump 110 to the water storage cavity 220 also disappears. Influenced by the pressure of the water inlet port 101 of the water purifier, the raw water will enter the power cavity 210 and press the water storage cavity 220, so that the purified water previously prepared in the water storage cavity 220 flows into the raw water port 121 of the reverse osmosis filter core 120 through the water outlet pipeline 240. The raw water on the raw water side in front of the membrane of the reverse osmosis filter core 120 is replaced, the reverse osmosis membrane is washed, and the reverse osmosis membrane is immersed in the purified water.

[0071] When the water storage device 200 is in use, since the power cavity 210 is connected with the water inlet port 101 of the water purifier, the pushing pressure can be maintained, so that the water outlet speed of the water storage cavity 220 can be kept constant during the process that the purified water is discharged from the water storage cavity 220, and it can also be ensured that all the purified water in the water storage cavity 220 is discharged, avoiding the residual of the purified water in the water storage cavity 220.

[0072] In another embodiment, referring to Figure 1 As shown, the water storage device 200 can be a pressure barrel, wherein the power cavity 210 includes an air bag. That is, an air bag filled with gas is arranged in the power cavity 210. When the water storage cavity 220 stores water, the air bag is pressed, and the pressure in the air bag rises. When the water in the water storage cavity 220 needs to be discharged to the external water route, the air bag converts the gas pressure in the air bag into power to push the water in the water storage cavity 220 to be discharged. The difference from the above-described embodiment is that the power source of the power cavity 210 is different, and the remaining working principle and action process can be referred to and will not be described in detail.

[0073] The power cavity 210 comprising the air bag can reduce the water connection of the water storage device 200, and without the communication between the power cavity 210 and the water inlet 101 of the water purifier, the power for discharging the water in the water storage cavity 220 can be generated, the structure is simple, and the connection is more convenient.

[0074] For convenience of description, the following description is based on the embodiment of the power cavity 210 comprising the air bag of the water storage device 200. Figure 1

[0075] Exemplarily, the controller is further configured to control the booster pump 110 to start according to the start water signal from the water outlet control device and to stop according to the stop water signal from the water outlet control device, so that the water purifier enters the standby state.

[0076] The start water signal and the stop water signal can come from the high-pressure switch arranged on the main water pipeline 100. For example, the high-pressure switch sends the start water signal and the stop water signal by the pressure in the main water pipeline 100. Alternatively, the controller can also receive the start water signal and the stop water signal generated based on the opening and closing operations from the electrically controlled faucet.

[0077] The water purifier with the controller can control the state of the water purifier in the above-mentioned various ways.

[0078] In one embodiment, as shown in Figure 5 The second check valve 310 is arranged on the main water pipeline 100 between the pure water outlet 122 and the water outlet 102, and the high-pressure switch 320 is arranged on the main water pipeline 100 between the second check valve 310 and the water outlet 102. The communication direction of the second check valve 310 is from the pure water outlet 122 to the water outlet 102, and the high-pressure switch 320 is electrically connected to the controller to send the signal to the controller as the water outlet control device. The off threshold of the high-pressure switch 320 is greater than the back pressure of the pure water side of the reverse osmosis filter element 120, and the preset value is, for example, 2.5 MPa. The preset value allows the water pressure in the water pipeline to fluctuate without causing the water purifier to malfunction.

[0079] The water purifier with the above arrangement can be connected to the mechanical faucet at the water outlet 102. When the mechanical faucet is opened to take water, the high-pressure switch 320 is turned on to send the start water signal to the controller, and the controller can control the booster pump 110 to start to perform the above-mentioned water making process.

[0080] ​When the user closes the mechanical faucet to stop taking water, the pressure in the water path where the high-pressure switch 320 is located will not immediately increase. Instead, after the pure water fills the storage cavity 220, the pressure in the main water pipeline 100 continues to increase from the water pressure at the water inlet 101 of the water purifier to its disconnection threshold before disconnection. At the same time, a stop taking water electrical signal is sent to the controller to control the booster pump 110 to stop working, and the water purifier enters a standby state. Since the storage cavity 220 is also filled with pure water at this time, it will be pushed by the power cavity 210 and immediately flush the reverse osmosis filter element 120 when the water purifier enters the standby state. And because of the setting of the second check valve 310, even if the booster pump 110 no longer provides pressure to the main water pipeline 100 after standby, the pressure between the high-pressure switch 320 and the water outlet 102 remains, avoiding false conduction operation of the high-pressure switch 320.

[0081] Therefore, the water purifier with this setting can be connected to the mechanical faucet, and the start and stop of the water purifier can be controlled by opening and closing the mechanical faucet, which is simple and feasible and can expand the use range of the water purifier. Moreover, the reverse osmosis filter element 120 can be flushed when the water purifier enters the standby state, and the reverse osmosis filter element 120 can be soaked in pure water in advance, further slowing down the diffusion phenomenon in the reverse osmosis filter element 120.

[0082] In another embodiment, the water outlet control device is an electric faucet, and the controller is further configured to be electrically connected to the electric faucet. The electric faucet can be externally connected to the water outlet 102.

[0083] When the user opens the electric faucet, it will send a start taking water electrical signal to the controller, and the controller will control the booster pump 110 to start and perform the above water making process.

[0084] For example, the controller can set a third time threshold. When the user closes the electric faucet, the electric faucet sends a stop taking water electrical signal to the controller. The controller starts a third timing operation after receiving the stop taking water electrical signal, and when the time counted by the third timing operation reaches the third time threshold, the controller controls the booster pump 110 to stop working, and the water purifier enters a standby state. The storage cavity 220 can be filled after the third time threshold is reached. The third time threshold can be set according to the total volume of the reverse osmosis filter element 120 and the water outlet speed of the pure water outlet 122. Alternatively, the third time threshold can be greater than or equal to the second time threshold. For the case where the third time threshold is greater than the second time threshold, the reverse osmosis filter element 120 can be flushed more thoroughly when the water purifier just enters the standby state, to reduce the burden of subsequent flushing operations and further improve the water quality of the water purifier.

[0085] Therefore, the water purifier for externally connecting an electric faucet has a simple water path and clear control logic, which is easy to implement.

[0086] Exemplarily, the second flow meter is arranged on the main water pipeline 100 between the booster pump 110 and the reverse osmosis filter cartridge 120, the water inlet pipeline 230, or the concentrated water pipeline arranged at the concentrated water outlet 123 of the reverse osmosis filter cartridge 120. The second flow meter is electrically connected to the controller. Referring to Figure 3 As exemplarily shown, taking the second flow meter arranged on the water inlet pipeline 230 as an example, similarly to the above, after the user closes the electrically controlled faucet, the electrically controlled faucet sends a stop water taking electric signal to the controller, and the pure water is filled into the water storage cavity 220. The second flow meter detects the water amount passing through the second flow meter. The controller accumulates the second water amount passing through the second flow meter since receiving the stop water taking electric signal of the electrically controlled faucet (i.e. since the pure water starts to enter the water storage cavity 220). When the controller determines that the second water amount reaches the preset second water amount threshold, the booster pump 110 is controlled to stop working, and the water purifier enters the standby state. The water storage cavity 220 can be filled to the brim after the second water amount threshold is reached. The second water amount threshold can be set according to the total volume of the reverse osmosis filter cartridge 120. Since the water storage cavity 220 is also filled with pure water at this time, and is pushed by the power cavity 210, the reverse osmosis filter cartridge 120 can be immediately flushed when the water purifier enters the standby state. The second flow meter and the first flow meter 610 can be the same flow meter.

[0087] Therefore, the water purifier with the second flow meter can also immediately flush the reverse osmosis filter cartridge 120 when the water purifier enters the standby state, and the reverse osmosis filter cartridge 120 is soaked in pure water in advance, which further slows down the diffusion phenomenon in the reverse osmosis filter cartridge 120. The second flow meter is used to control the water storage amount of the water storage device, so that the water storage amount is not affected by the water pressure, and the control precision is higher. Moreover, the second flow meter not only can calculate the water amount flowing into the water storage cavity 220, but also has other application functions, and lays a hardware foundation for expanding the functions of the water purifier.

[0088] Exemplarily, the concentrated water electromagnetic valve 520 is arranged at the concentrated water outlet 123 of the reverse osmosis filter cartridge 120. The concentrated water electromagnetic valve 520 has a conduction state and a cut-off state. During the standby state and the water making process, the concentrated water electromagnetic valve 520 is in the cut-off state. When the water purifier flushes the reverse osmosis filter cartridge 120, the concentrated water electromagnetic valve 520 is in the conduction state, so that the reverse osmosis filter cartridge 120 can be flushed by using the water flow with large flux, the filtering effect of the reverse osmosis filter cartridge 120 is improved, and the service life of the reverse osmosis filter cartridge 120 is prolonged.

[0089] Exemplarily, a third check valve 530 is arranged on the water inlet pipeline 230, and the communication direction of the third check valve 530 is from the pure water outlet 122 to the water storage cavity 220. This arrangement can prevent the water in the water storage cavity 220 from entering the pure water side of the reverse osmosis filter core 120 during the flushing process of the reverse osmosis filter core 120 by the water storage cavity 220, and control the water outlet of the water storage cavity 220 to flow into the reverse osmosis filter core 120 only through the water outlet pipeline 240, so that the direction of water flow during the flushing process is more clear and clear.

[0090] Exemplarily, a pre-filter core 700 is arranged at the water inlet 101 of the main water pipeline 100. The pre-filter core 700 is the first rough filtration equipment of the water purifier, which can remove visible solid impurities in the pipeline, mainly iron rust, sand, algae, colloid and the like, and actively protect the faucet and the internal pipeline of the water purifier.

[0091] Exemplarily, a water inlet electromagnetic valve 510 is arranged on the main water pipeline 100 between the water inlet 101 and the booster pump 110. The water inlet electromagnetic valve 510 can have two states of conduction and cut-off, and it can be linked with the booster pump 110, that is, when the booster pump 110 starts, the water inlet electromagnetic valve 510 opens; when the booster pump 110 stops, the water inlet electromagnetic valve 510 closes.

[0092] Because the waste water ratio device communicating with the atmosphere is arranged at the concentrated water outlet 123 of the reverse osmosis filter core 120. The raw water side of the reverse osmosis filter core 120 can be discharged through the waste water ratio device. Therefore, the water inlet electromagnetic valve 510 can prevent the water at the water inlet 101 from flowing through the booster pump 110 and entering the raw water side of the reverse osmosis filter core 120 and flowing out from the concentrated water outlet 123 after the water purifier enters the standby state. Thus, the waste of water resources is reduced.

[0093] According to another aspect of the present application, a control method of a water purifier is provided. The water purifier comprises a main water pipeline 100 connecting a water inlet 101 and a water outlet 102 of the water purifier, a booster pump 110 and a reverse osmosis filter 120 arranged in sequence along the water flow direction of the main water pipeline 100, and a water storage device 200 comprising a power chamber 210 and a water storage chamber 220. The total volume of the power chamber 210 and the water storage chamber 220 is fixed and unchangeable, and the volume ratio of each chamber can be changed according to the water pressure in the chamber. The water storage chamber 220 is connected to a pure water outlet 122 of the reverse osmosis filter 120 through a water inlet pipeline 230. The water storage chamber 220 is also connected to a raw water outlet 121 of the reverse osmosis filter 120 through a water outlet pipeline 240. A first check valve 250 is arranged on the water outlet pipeline 240. The connection direction of the first check valve 250 is from the water storage chamber 220 to the raw water outlet 121. The water purifier further comprises a controller electrically connected to the booster pump 110. The control method comprises: automatically or according to a first electric signal from a water storage starting control device, controlling the booster pump 110 to start, and automatically or according to a second electric signal from a water storage ending control device, controlling the booster pump 110 to stop working, during the period when the water purifier is in a standby state.

[0094] Exemplarily, the step of automatically controlling the booster pump 110 to start can comprise: starting to perform a first timing operation when the water purifier enters the standby state, and controlling the booster pump 110 to start every first time threshold value when the timing of the first timing operation reaches the first time threshold value. The step of automatically controlling the booster pump 110 to stop working can comprise: starting to perform a second timing operation from the time when the booster pump 110 starts to work during the period when the water purifier is in the standby state, and controlling the booster pump 110 to stop working when the timing of the second timing operation reaches a second time threshold value.

[0095] Exemplarily, a first flow meter 610 is arranged on the main water pipeline 100 between the booster pump 110 and the reverse osmosis filter 120, the water inlet pipeline 230, or a concentrated water pipeline arranged at a concentrated water outlet 123 of the reverse osmosis filter 120. The first flow meter 610 is electrically connected to the controller to serve as the water storage ending control device. The control method can further comprise: during the period when the water purifier is in the standby state, according to a second electric signal from the first flow meter 610, accumulating a first water amount passed through the first flow meter 610 since the booster pump 110 starts to work, and controlling the booster pump 110 to stop working when the first water amount reaches a first water amount threshold value.

[0096] Exemplarily, the above control method can further comprise: according to a starting water taking electric signal from a water outlet control device, controlling the booster pump to start, and according to a stopping water taking electric signal from the water outlet control device, controlling the booster pump to stop working, so that the water purifier enters the standby state.

[0097] Exemplarily, the water outlet control device is an electric faucet, and the controller is further configured to electrically connect the electric faucet. The step of controlling the booster pump 110 to stop working according to the stop water taking electric signal from the water outlet control device can include: starting a third timing operation from receiving the stop water taking electric signal of the electric faucet; and controlling the booster pump 110 to stop working when a third time threshold is reached by the third timing operation.

[0098] Exemplarily, the water outlet control device is an electric faucet, and the controller is further configured to electrically connect the electric faucet. A second flow meter is arranged on the water inlet pipeline 230, and the second flow meter is electrically connected to the controller. The step of controlling the booster pump 110 to stop working according to the stop water taking electric signal from the water outlet control device can include: accumulating a second water volume passed by the second flow meter since receiving the stop water taking electric signal of the electric faucet; and controlling the booster pump 110 to stop working when the second water volume reaches a second water volume threshold.

[0099] The control method of the water purifier according to an embodiment of the present application will be described in detail below with reference to the embodiment shown in Figure 1 The water outlet control device is an electric faucet, and the power cavity 210 of the water storage device 200 includes an air bag. The controller can automatically control the start and stop of the booster pump 110.

[0100] When the user opens the electric faucet to take water, the booster pump 110 starts, the reverse osmosis filter element 120 filters, and the purified water is discharged from the water taking opening 102 by the purified water opening 122, completely flows out of the water taking device and is taken by the user. After the user closes the electric faucet, the booster pump 110 stops working, and the water purifier enters a standby state.

[0101] When the water purifier enters the standby state, that is, the booster pump 110 stops working, the controller starts a first timing operation. When the time counted by the first timing operation reaches a first time threshold, the booster pump 110 starts, and the purified water prepared by the reverse osmosis filter element 120 will be filled into the water storage cavity 220 through the water inlet pipeline 230, and the power cavity 210 is squeezed, so that the volume of the power cavity 210 is reduced.

[0102] When the booster pump 110 starts, the controller starts a second timing operation. The working time of the booster pump 110 is timed. When the time counted by the second timing operation reaches a second time threshold, the booster pump 110 stops working. The second time threshold can be calculated according to the volume of the water storage cavity 220 and the displacement of the booster pump 110, that is, after the water storage cavity 220 is filled with the expected volume of purified water, the booster pump 110 can stop working.

[0103] After the booster pump 110 stops working, the pressure provided by the booster pump 110 to the water storage cavity 220 disappears. The water storage cavity 220 is squeezed by the thrust provided by the power cavity 210, so that the pure water previously stored in the water storage cavity 220 flows into the raw water inlet 121 of the reverse osmosis filter core 120 through the water outlet pipeline 240. The raw water on the raw water side before the reverse osmosis filter core 120 membrane is replaced, the reverse osmosis membrane is washed and immersed in pure water.

[0104] When the user takes water next time, the current standby state is interrupted, and the water purifier enters the water making state for the user again.

[0105] Those skilled in the art can understand the specific steps in the control method of the water purifier and the technical effects thereof by reading the foregoing detailed description of the water purifier, and will not be repeated here for brevity.

[0106] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the present specification.

[0107] Similarly, it should be appreciated that the individual features of the application have sometimes been presented together in a single embodiment, drawing or description of an illustrative embodiment of the application for the purpose of brevity and to help understand one or more of the individual inventive aspects. However, this method of the application should not be interpreted as reflecting a desire to claim more than a single embodiment of the claimed application than the features explicitly recited in each claim. Rather, the inventive point is that the corresponding technical problem can be solved with fewer features than all the features of a certain disclosed single embodiment, as reflected in the corresponding claims. Therefore, the claims following the detailed description are hereby expressly incorporated into the detailed description, wherein each claim itself is a separate embodiment of the application.

[0108] Those skilled in the art can understand that all the features disclosed in the specification (including the accompanying claims, abstract and drawings) and all the processes or units of any method or device disclosed thereby can be combined in any combination except that the features are mutually exclusive. Unless otherwise explicitly stated, each feature disclosed in the specification (including the accompanying claims, abstract and drawings) can be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0109] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0110] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0111] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0112] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water purifier, comprising a main water pipeline connecting a water inlet and a water outlet of the water purifier, a booster pump and a reverse osmosis filter cartridge being arranged in sequence in a water flow direction on the main water pipeline, characterized in that: the water purifier further comprises a water storage device, the water storage device comprising a power cavity and a water storage cavity, a total volume of the power cavity and the water storage cavity being fixed and unchangeable, and the power cavity and the water storage cavity being capable of changing a volume ratio of each other according to a water pressure in the cavity; the water storage cavity is connected with a pure water outlet of the reverse osmosis filter cartridge through a water inlet pipeline, a third check valve being arranged on the water inlet pipeline, a connection direction of the third check valve being from the pure water outlet to the water storage cavity, the water storage cavity is further connected with a raw water outlet of the reverse osmosis filter cartridge through a water outlet pipeline, a first check valve being arranged on the water outlet pipeline, a connection direction of the first check valve being from the water storage cavity to the raw water outlet; the water purifier further comprises a controller, the controller being electrically connected to the booster pump, the controller being configured to: automatically or according to a first electric signal from a water storage starting control device, control the booster pump to start; and automatically or according to a second electric signal from a water storage ending control device, control the booster pump to stop working.

2. The water purifier of claim 1, characterized in that: the controller automatically controls the booster pump to start by starting to perform a first timing operation when the water purifier enters a standby state, and controlling the booster pump to start every first time threshold value when a time counted by the first timing operation reaches a first time threshold value; and / or the controller automatically controls the booster pump to stop working by starting to perform a second timing operation from when the booster pump starts to work during a period when the water purifier is in the standby state, and controlling the booster pump to stop working when a time counted by the second timing operation reaches a second time threshold value; an operable member is arranged on a shell of the water purifier, the operable member being electrically connected to the controller to serve as the water storage starting control device; a first flow meter is arranged on the main water pipeline between the booster pump and the reverse osmosis filter cartridge, the water inlet pipeline or a concentrated water pipeline arranged at a concentrated water outlet of the reverse osmosis filter cartridge, the first flow meter being electrically connected to the controller to serve as the water storage ending control device; the controller is further configured to control the booster pump to start according to a start water taking electric signal from a water outlet control device and to control the booster pump to stop working according to a stop water taking electric signal from the water outlet control device, so as to make the water purifier enter the standby state; a second check valve is arranged on the main water pipeline between the pure water outlet and the water outlet in the water flow direction, a connection direction of the second check valve being from the pure water outlet to the water outlet, a high-voltage switch being electrically connected to the controller to serve as the water outlet control device; the water outlet control device is an electrically controlled faucet, and the controller is further configured to be electrically connected to the electrically controlled faucet. ​ ​ ​ ​ ​ ​ ​ ​ 3. The water purifier as claimed in claim 1, wherein, ​ 4. The water purifier of claim 1, wherein ​ 5. The water purifier as claimed in claim 1, wherein, ​ 6. The water purifier of claim 5, wherein ​ 7. The water purifier as claimed in claim 5, wherein, ​ 8. The water purifier of claim 7, wherein A second flow meter is arranged on the main water pipeline between the booster pump and the reverse osmosis filter cartridge, the water inlet pipeline or the concentrated water pipeline arranged at the concentrated water outlet of the reverse osmosis filter cartridge, and is electrically connected to the controller.

9. The water purifier according to any one of claims 1 to 8, wherein The water storage device is a pressure tank, and the power cavity comprises an air bag.

10. The water purifier according to any one of claims 1 to 8, wherein The power cavity is communicated with a water inlet of the water purifier.

11. The water purifier according to any one of claims 1 to 8, wherein The concentrated water outlet of the reverse osmosis filter cartridge is provided with a concentrated water electromagnetic valve.

12. A control method of a water purifier, the water purifier comprising a main water pipeline communicated with a water inlet and a water outlet of the water purifier, a booster pump and a reverse osmosis filter cartridge arranged in sequence on the main water pipeline in the direction of water flow, characterized in that, The water purifier further comprises a water storage device, the water storage device comprising a power cavity and a water storage cavity, the total volume of the power cavity and the water storage cavity being fixed and unchangeable, and the volume ratio of each cavity being changeable according to the water pressure in the cavity; the water storage cavity is communicated with a pure water outlet of the reverse osmosis filter cartridge through a water inlet pipeline, the water inlet pipeline is provided with a third check valve, the communication direction of the third check valve being from the pure water outlet to the water storage cavity, the water storage cavity is further communicated with a raw water outlet of the reverse osmosis filter cartridge through a water outlet pipeline, the water outlet pipeline is provided with a first check valve, the communication direction of the first check valve being from the water storage cavity to the raw water outlet; the water purifier further comprises a controller, the controller being electrically connected to the booster pump. The control method comprises: During the period when the water purifier is in the standby state, controlling the booster pump to start automatically or according to a first electric signal from a water storage starting control device; and controlling the booster pump to stop working automatically or according to a second electric signal from a water storage ending control device.

13. The control method according to claim 12, characterized in that, the automatic control of the booster pump to start comprises: starting to perform a first timing operation when the water purifier enters the standby state; and controlling the booster pump to start every first time threshold value when the time counted by the first timing operation reaches the first time threshold value; and / or the automatic control of the booster pump to stop working comprises: starting to perform a second timing operation from when the booster pump starts during the period when the water purifier is in the standby state; and controlling the booster pump to stop working when the time counted by the second timing operation reaches a second time threshold value.

14. The control method according to claim 12, characterized by, A first flow meter is arranged on the main water pipeline between the booster pump and the reverse osmosis filter cartridge, the water inlet pipeline or the concentrated water pipeline arranged at the concentrated water outlet of the reverse osmosis filter cartridge, and is electrically connected to the controller to serve as the water storage ending control device; The control method further comprises: during the period when the water purifier is in the standby state, accumulating a first water amount passed through by the first flow meter from when the booster pump starts according to the second electric signal from the first flow meter; and when the first water amount reaches a first water amount threshold value, controlling the booster pump to stop working. The control method further comprises:

15. The control method according to claim 12, wherein controlling the booster pump to start according to a starting water taking electric signal from a water outlet control device; and ​ The booster pump is controlled to stop working according to a water-taking stopping electric signal from the water outlet control device, so that the water purifier enters a standby state.

16. The control method according to claim 15, characterized by The water outlet control device is an electric faucet, and the controller is further configured to be electrically connected to the electric faucet. The control of the booster pump to stop working according to the water-taking stopping electric signal from the water outlet control device comprises: a third timing operation is started from the reception of the water-taking stopping electric signal of the electric faucet; and the booster pump is controlled to stop working when the time counted by the third timing operation reaches a third time threshold.

17. The control method according to claim 15, characterized by, The water outlet control device is an electric faucet, and the controller is further configured to be electrically connected to the electric faucet: a second flow meter is arranged on a main water pipeline between the booster pump and the reverse osmosis filter element, the water inlet pipeline or a concentrated water pipeline arranged at a concentrated water outlet of the reverse osmosis filter element, and the second flow meter is electrically connected to the controller. The control of the booster pump to stop working according to the water-taking stopping electric signal from the water outlet control device comprises: a second water amount passed through the second flow meter since the reception of the water-taking stopping electric signal of the electric faucet is accumulated; and the booster pump is controlled to stop working when the second water amount reaches a second water amount threshold.

Images