CN113651393A

CN113651393A - Water purifier and control method for water purifier

Info

Publication number: CN113651393A
Application number: CN202010398975.XA
Authority: CN
Inventors: 朱萍萍; 王洪坤
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd; Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-11-16

Abstract

The invention provides a water purifier and a control method thereof. The purifier includes booster pump and reverse osmosis filter core, and the delivery port of booster pump communicates to the former water port of reverse osmosis filter core, and the purifier still includes: the first valve body is communicated between a pure water port of the reverse osmosis filter element and a water outlet end of the water purifier; the water storage device comprises a water storage inlet and a water storage outlet, the water storage inlet is communicated with the water inlet of the first valve body through a water storage inlet pipe, and the water storage outlet is communicated with the water outlet of the first valve body through a water storage outlet pipe; and the water quality detector is arranged between the pure water port of the reverse osmosis filter element and the water storage inlet. This purifier can detect the pure water of reverse osmosis filter core preparation in real time, can control switching on or ending of first valve body according to the testing result, decides the rivers trend from this. Therefore, the TDS of the head cup water received by the user is prevented from being higher. The water purifier with the structure has the advantages of simple water path and less elements, and can reduce the water leakage risk.

Description

Water purifier and control method for water purifier

Technical Field

The invention relates to the technical field of water purification, in particular to a water purifier and a control method for the water purifier.

Background

With the pursuit of the public on the quality of life, the water purifier gradually enters the families of people. Reverse osmosis water purifiers are becoming more popular because the purified water produced by them is fresher, more sanitary and safer.

In a reverse osmosis water purifier, a water storage device is not usually arranged, and water taken by a user is directly prepared by a booster pump and a reverse osmosis filter element. However, at present, some reverse osmosis water purifiers with large flux, such as reverse osmosis water purifiers with flux of 400G (gallon) and 500G (gallon), are not provided with a pure water storage tank generally because the flux of the reverse osmosis membrane is large and the water flow speed is high. When a user takes water, the water purifier immediately prepares pure water to supply the pure water to the user, thereby ensuring the freshness of the pure water.

However, due to the characteristics of the reverse osmosis filter element, a certain amount of pure water and raw water can be stored before and after the membrane of the reverse osmosis filter element is determined after the water purifier is shut down, when the booster pump does not work, ions in the raw water in the membrane can diffuse forward to the membrane, so that the pure water is polluted after the membrane is standby for a long time, the TDS value of the cup water is high when a user receives the water, and the daily drinking of the user cannot be met.

Disclosure of Invention

In order to at least partially solve the problems in the prior art, the invention provides a water purifier, which comprises a booster pump and a reverse osmosis filter element, wherein a water outlet of the booster pump is communicated to a raw water inlet of the reverse osmosis filter element, and the water purifier further comprises: the first valve body is communicated between a pure water port of the reverse osmosis filter element and a water outlet end of the water purifier; the water storage device comprises a water storage inlet and a water storage outlet, the water storage inlet is communicated with the water inlet of the first valve body through a water storage inlet pipe, and the water storage outlet is communicated with the water outlet of the first valve body through a water storage outlet pipe; and the water quality detector is arranged between the pure water port of the reverse osmosis filter element and the water storage inlet.

In summary, when a user takes water, the water quality detector can detect pure water prepared by the reverse osmosis filter element in real time, and the first valve body can be controlled to be switched on or switched off according to a detection result, so that the trend of water flow is determined. If the first section of water prepared by the reverse osmosis filter element is unqualified in quality, the first valve body is cut off, so that the first section of water enters the water storage device and is mixed with the pure water stored in the water storage device, and then the water is taken by a user. That is, the water obtained from the water outlet end after the user is powered on is the mixed water from the water storage device. If the first section of water prepared by the reverse osmosis filter element is completely conveyed to the water storage device, the quality of the continuously prepared pure water is qualified, and the pure water can be directly conveyed to the water outlet end, and the obtained water comprises the pure water newly prepared by the reverse osmosis filter element and the mixed water in the water storage device. Therefore, the TDS of the head cup water received by the user is prevented from being higher. In addition, after the water quality is qualified, the water taken by the user can come from the water pre-stored in the water storage device and the water newly prepared by the reverse osmosis filter element, so that the water yield can be increased. In addition, the water purifier with the structure has simple water paths and a small number of elements, so that the water leakage risk can be reduced.

Illustratively, the water purifier comprises a controller, wherein the controller is electrically connected with the water quality detector and the first valve body, and when the controller determines that the water quality is unqualified based on the detection result of the water quality detector, the controller controls the first valve body to stop; and when the controller determines that the water quality is qualified based on the detection result of the water quality detector, the first valve body is controlled to be conducted.

The water quality detector detects water in a pipeline where the water quality detector is located in real time, and the controller also obtains the detection result of the water quality detector in real time, so that the controller can timely control the first valve body to be switched on and switched off in the water taking process of a user. Therefore, even if the water quality is changed due to other reasons after the first section of water prepared by the reverse osmosis filter element passes, the first valve body can be timely controlled, so that the situation that a user obtains pure water meeting the standard during the first section of water prepared by the reverse osmosis filter element is ensured, and the situation that the water received by the user at any time meets the standard is also ensured. And the water purifier with the controller can make the judgment on the detection signal more accurate and rapid, and further improves the use experience of users.

Exemplarily, a second valve body is arranged on the water storage and inlet pipe, the second valve body is electrically connected with the controller, and the controller controls the second valve body to be conducted and starts the booster pump when receiving the starting signal.

The second valve body has the main function of preventing ions in the raw water and the concentrated water stored in front of the membrane of the reverse osmosis filter element from diffusing into the water storage device after the reverse osmosis filter element is stopped (namely, the booster pump stops working), so that the water in the water storage device is polluted. In addition, the second valve body can also prevent water in the water storage device from flowing back to the reverse osmosis filter element when the water storage device is stopped and water still exists in the water storage device, and the water flows out from a thick water port of the reverse osmosis filter element to cause water resource waste, particularly under the condition that the water storage device is a pressure barrel. If the second valve body is not arranged, water in the pressure barrel is discharged out through the concentrated water port of the reverse osmosis filter element under the action of the self pressure of the pressure barrel. Thus, there is substantially no water available in the water storage device when the next water is to be taken. In addition, through setting up the second valve body and can also in time block rivers, avoid the condition emergence that leads to leaking because the unexpected water spot that appears in the purifier pipeline.

Exemplarily, a second valve body is arranged on the water storage and inlet pipe and electrically connected with a controller, and the controller controls the second valve body to be conducted when the controller determines that the water quality is unqualified based on the detection result of the water quality detector; and the controller controls the second valve body to stop when the water quality is determined to be qualified based on the detection result of the water quality detector.

When the valve is started, the on-off state of the second valve body is opposite to that of the first valve body. That is to say, when the water quality is unqualified, the first section of water is completely injected into the water storage device, and is conveyed to the water outlet end after being mixed and diluted; when the water quality is qualified, the pure water newly prepared by the reverse osmosis filter element is directly conveyed to the water outlet end, and meanwhile, the water in the water storage device is also conveyed to the water outlet end through the water storage water outlet pipe. Therefore, after the water quality is qualified, the pure water newly prepared by the reverse osmosis filter element does not flow into the water storage device, and compared with the embodiment that the second valve body is still opened after the water quality is qualified, the proportion of the pure water newly prepared in the water delivered to the water outlet end is higher, so that the TDS of the water acquired by the water outlet end can be reduced. This is because if the user takes a small amount of water many times and the water in the water storage device is not drained every time the user takes water, the TDS of the water in the water storage device may be continuously increased, and therefore, the proportion of the pure water newly prepared in the water acquired by the user is increased, and the TDS of the water acquired by the water outlet end can be reduced.

The water purifier also comprises a detector for detecting the water quantity in the water storage device, wherein the controller controls the second valve body to cut off and stop the booster pump after receiving the shutdown signal and determining that the water quantity in the water storage device is higher than the upper water quantity limit based on the detection result of the detector.

The control logic of the scheme is simple and is easy to realize on a circuit.

The water purifier also comprises a detector for detecting the water quantity in the water storage device, wherein the controller controls the second valve body to cut off when determining that the water quantity in the water storage device is lower than the lower water quantity limit based on the detection result of the detector; and the controller controls the second valve body to be communicated when receiving a shutdown signal, and controls the second valve body to be stopped and stops the booster pump when determining that the water quantity in the water storage device is higher than the upper limit of the water quantity.

Because the water quantity in the water storage device is lower than the lower limit of the water quantity, only the reverse osmosis filter element directly supplies water, so the water flow is stable, the influence of a pipeline where the water storage device is located on the water flow is not considered, and the scheme is simple.

Illustratively, a third valve body is arranged on the water storage and water outlet pipe and electrically connected with the controller, and the controller controls the conduction of the third valve body when receiving a starting signal; and the controller controls the third valve body to close when receiving the shutdown signal.

The third valve body is mainly used for closing the third valve body after shutdown, so that water can be fully stored in the water storage device, and a higher pressure is built in the water storage device. And, set up the high pressure in water storage device after shutting down, can increase water flow when the user gets the water to promote user experience. In addition, the third valve body can also block water flow in time, so that the water leakage caused by the accidental water leakage point in the pipeline of the water purifier is avoided.

The water purifier also comprises a detector for detecting the water quantity in the water storage device, and the controller controls the third valve body to be cut off when determining that the water quantity in the water storage device is lower than the lower water quantity limit based on the detection result of the detector.

Therefore, the situation that water flows back to the water storage device after passing through the first valve body due to the fact that water pressure in the water storage device is low after water in the water storage device is taken out completely in the water taking process of a user, and the flow of a water outlet end is small can be avoided.

Illustratively, the detector includes a pressure sensor, and the pressure sensor is arranged in the water storage water inlet pipe or the water storage water outlet pipe.

The pressure sensor is used for reflecting the water quantity in the water storage device by detecting the water pressure of a pipeline where the water storage device is located. When the water pressure detected by the pressure sensor is higher, the water storage device indicates that the water quantity in the water storage device is higher; otherwise, the water quantity in the water storage device is less.

Illustratively, the water storage device comprises a pressure tank.

The pressure barrel is a container in which pressure can be generated, and water stored in the pressure barrel is discharged by the pressure. The water purifier with the pressure barrel can enable pure water stored in the water purifier to be taken by a user after the water outlet device is opened by the user under the condition that the water purifier is not connected with external water supply equipment such as a water suction pump.

Exemplarily, a first check valve is arranged on the water storage and inlet pipe, and the conduction direction of the first check valve is from a pure water port of the reverse osmosis filter element to the water storage inlet; and/or a second check valve is arranged on the water storage outlet pipe, and the conduction direction of the second check valve is from the water storage outlet to the water outlet end of the water purifier.

When standby state, the water in the pressure bucket can be avoided by the pure mouth of a river of the palirrhea reverse osmosis filter core of water storage inlet tube to first check valve, is discharged by the dense mouth of a river of reverse osmosis filter core, causes the waste of water resource. The second check valve can avoid that the water that the reverse osmosis filter core was prepared flows backwards in the water storage device behind first valve body when the user was in the water intaking, leads to the flow of play water end less.

Illustratively, the water quality detector comprises a TDS probe.

The TDS probe has advantages such as small, the integrated level is high, the function is single-purpose and with low costs, consequently sets up on the water route of this purifier, the sexual valence relative altitude.

Illustratively, the purifier still includes third check valve and high pressure switch, and the third check valve intercommunication is between the delivery port of first valve body and the water outlet end of purifier, and high pressure switch sets up between the water outlet end of third check valve and purifier.

In this case, both the power-on signal and the power-off signal sent to the controller are from the high-voltage switch. And when the high-voltage switch is switched off, a starting signal is sent to the controller, and when the high-voltage switch is switched off, a shutdown signal is sent to the controller. The water purifier with the structure can be controlled by the mechanical faucet, so that the application range of the water purifier is enlarged, and the water purifier can be applied to various occasions.

According to another aspect of the present invention, there is also provided a control method for a water purifier, the water purifier including a booster pump and a reverse osmosis filter element, a water outlet of the booster pump being communicated to a raw water outlet of the reverse osmosis filter element, the water purifier further including: the first valve body is communicated between a pure water port of the reverse osmosis filter element and a water outlet end of the water purifier; the water storage device comprises a water storage inlet and a water storage outlet, the water storage inlet is communicated with the water inlet of the first valve body through a water storage inlet pipe, and the water storage outlet is communicated with the water outlet of the first valve body through a water storage outlet pipe; and a water quality detector, the water quality detector is arranged between the pure water port and the water storage inlet of the reverse osmosis filter element,

the control method comprises the following steps: starting a booster pump when a starting signal is received; the water quality detector detects the water quality in the pipeline; determining whether the water quality is qualified or not based on the detection result of the water quality detector, and controlling the first valve body to be conducted if the water quality is qualified; if the water quality is unqualified, the first valve body is controlled to stop.

The control method comprises the following steps that a first valve body is arranged on the water storage water inlet pipe, and after a starting signal is received, the first valve body is controlled to be communicated and the water quantity in the water storage device is detected; after receiving the shutdown signal, the control method further includes: and determining whether the water quantity in the water storage device is higher than the upper limit of the water quantity, and if the water quantity in the water storage device is higher than the upper limit of the water quantity, controlling the second valve body to stop and shutting down the booster pump.

Exemplarily, a second valve body is arranged on the water storage and inlet pipe, and after the start-up signal is received, the control method further comprises the following steps: controlling the conduction of the second valve body and detecting the water quantity in the water storage device; determining whether the water quantity in the water storage device is lower than a water quantity lower limit, and if the water quantity is lower than the water quantity lower limit, controlling the second valve body to stop; and when a shutdown signal is received, the second valve body is controlled to be conducted, and when the water quantity in the water storage device reaches the upper limit of the water quantity, the second valve body is controlled to be stopped and the booster pump is stopped.

The control method further comprises the step of controlling the third valve to be conducted after the start-up signal is received, and the step of controlling the third valve to be closed after the shutdown signal is received.

Illustratively, after receiving the power-on signal, the control method further includes: detecting the water amount in the water storage device; and determining whether the water quantity in the water storage device is lower than a water quantity lower limit, and controlling the third valve body to be closed if the water quantity is lower than the water quantity lower limit.

A series of concepts in a simplified form are introduced in the summary of the invention, which is described in further detail in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a schematic water circuit diagram of a water purifier according to a first exemplary embodiment of the present invention;

FIG. 2 is a schematic illustration of a water circuit of a water purifier according to a second exemplary embodiment of the present disclosure;

FIG. 3 is a schematic illustration of a water circuit of a water purifier according to a third exemplary embodiment of the present invention;

FIG. 4 is a schematic illustration of a water circuit of a water purifier according to a fourth exemplary embodiment of the present disclosure; and

FIG. 5 is a schematic illustration of a water circuit of a water purifier according to a fifth exemplary embodiment of the invention; .

Wherein the figures include the following reference numerals:

101. a water outlet end; 110. a booster pump; 120. a reverse osmosis filter element; 121. a raw water port; 122. a pure water port; 123. a dense water port; 210. a first valve body; 220. a second valve body; 230. a third valve body; 300. a water storage device; 301. a water storage inlet; 302. a water storage outlet; 310. a water storage and inlet pipe; 320. a water storage and outlet pipe; 400. a water quality detector; 410. a pressure sensor; 510. a first check valve; 520. a second check valve; 530. a third check valve; 540. a high-voltage switch.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description merely illustrates a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In other instances, well known features have not been described in detail so as not to obscure the invention.

The invention provides a water purifier, which can avoid high TDS of head cup water after the water purifier is standby for a long time. Fig. 1 shows a schematic diagram of a water circuit of a water purifier adopting the water purifier according to one embodiment of the invention, and arrows shown in the diagram schematically show the flowing direction of water flow in the water purifier.

As shown in fig. 1, the reverse osmosis membrane bioreactor comprises a booster pump 110 and a reverse osmosis filter element 120, wherein a water outlet of the booster pump 110 is communicated with a raw water port of the reverse osmosis filter element 120. The reverse osmosis filter element 120 can effectively remove impurities such as calcium, magnesium, bacteria, organic matters, inorganic matters, metal ions, radioactive substances and the like in water. The production of pure water by filtration through the booster pump 110 and the reverse osmosis cartridge 120 is well known to those skilled in the art and will not be described in further detail herein.

The water purifier further comprises a first valve body 210, a water storage device 300 and a water quality detector 400.

The first valve body 210 may be any valve having an opening and closing function. The first valve body 210 is communicated between the pure water port 122 of the reverse osmosis filter element 120 and the water outlet end 101 of the water purifier. The first valve body 210 may be any one of or a combination of plural kinds of solenoid valves, electric valves, pneumatic valves, hydraulic valves, and the like as long as the function thereof can be achieved. Wherein, the solenoid valve may include a general solenoid valve and a water inlet solenoid valve. The general solenoid valve has only an on/off function. The water inlet solenoid valve is widely used in the field of water purification, and has directionality in addition to on/off function. The water inlet electromagnetic valve can be conducted in two directions when being electrified, is equivalent to a check valve which can be conducted in reverse direction when being electrified, and can be matched with other check valves which are conducted in forward direction in the water purifier to jointly cut off a water path. In the reverse osmosis water purifier, a water inlet solenoid valve is generally disposed upstream of the booster pump 110 to block a water path to prevent a long flow of wastewater. Therefore, the first valve body 210 adopts the water inlet electromagnetic valve, so that the types of parts in the water purifier can be reduced, the standardization is facilitated, the cost is reduced, and the probability of assembly errors in the assembly process is reduced.

The water storage means 300 may comprise one or more of a pressure tank and a water tank. The water storage device 300 stores pure water prepared in advance. When the user turns on the water intake device connected to the water outlet 101 of the water purifier, the water in the water storage device 300 can be discharged and taken by the user. The water intake device may include one or more of a faucet, a pipeline machine, and the like. The water storage apparatus 300 includes a water storage inlet 301 and a water storage outlet 302. The water storage inlet 301 is communicated with the water inlet of the first valve body 210 through a water storage inlet pipe 310, and the water storage outlet 302 is communicated with the water outlet of the first valve body 210 through a water storage outlet pipe 320. That is, the water storage means 300 is connected in parallel with the first valve body 210.

When the water storage device 300 is a water tank, a water pump may be disposed on the water storage outlet pipe 320 to deliver the purified water prepared in advance in the water tank to the water outlet end. Preferably, the water storage device 300 may be a pressure tank. The pressure barrel is a container in which pressure can be generated, and water stored in the pressure barrel is discharged by the pressure. The water purifier with the pressure barrel can enable pure water stored in the water purifier to be taken by a user after the water outlet device is opened by the user under the condition that the water purifier is not connected with external water supply equipment such as a water suction pump. When the water purifier is in standby, the booster pump 110 and the reverse osmosis filter element 120 work to store water in the pressure barrel, and the pressure in the pressure barrel is increased. When the water outlet end discharges water, the pressure barrel releases pressure and conveys the water stored in the pressure barrel to the water outlet end. The water storage device 300 is realized by the pressure barrel, so that the number of parts in the water purifier can be reduced, the cost of the water purifier is reduced, and the size of the water purifier is reduced.

The water quality detector 400 may be disposed between the pure water port 122 of the reverse osmosis cartridge 120 and the water storage inlet 301. The water quality detector 400 may detect the water quality of the water discharged from the pure water port 122 of the reverse osmosis filter element 120. Specifically, the water quality detector 400 may be disposed on a pipeline communicating between the pure water port 122 of the reverse osmosis filter element 120 and the water inlet of the first valve body 210, as shown in fig. 1, and the water quality detector 400 may also be disposed on the water storage and inlet pipe 310, as shown in fig. 2. Fig. 2 is different from fig. 1 in the location of the water quality detector 400. When the water outlet 101 discharges water, the reverse osmosis filter element 120 produces water, and no matter whether the first valve body 210 is open or closed, water flows through the water inlet and outlet pipe 310 (as will be described in detail later), so that the water quality detector 400 is disposed on the water inlet and outlet pipe 310 and can detect the quality of the pure water produced by the reverse osmosis filter element 120 in real time.

Illustratively, the water quality detector 400 may include a TDS probe. TDS is an abbreviation for total dissolved solids, measured in milligrams per liter (mg/L), which indicates how many milligrams of dissolved solids are dissolved in 1 liter of water. Higher TDS values indicate more solutes in the water. The TDS value that TDS probe can direct detection water, in reverse osmosis water purification machine's field, whether it is qualified to generally adopt the TDS value to react quality of water, consequently adopts the TDS probe can detect the pure water quality of water that reverse osmosis filter core 120 prepared most directly accurately. In addition, the TDS probe still has advantages such as small, the integrated level is high, the function is single-purpose and with low costs, consequently sets up on the water route of this purifier, the sexual valence relative altitude. Of course, the water quality detector 400 may be any other detector capable of detecting the quality of pure water, such as a conductivity meter.

The principle of the present invention will be explained below by taking an example in which the water quality detector 400 detects the TDS value of pure water to reflect whether the water quality is acceptable.

When a user starts to take water, the water purifier is started, the booster pump 110 is started, and the pure water prepared by the reverse osmosis filter element 120 is discharged from the pure water port 122 and is firstly detected by the water quality detector 400. If the TDS value detected by the water quality detector 400 is low, which indicates that the water quality is qualified, when a user takes water, the first valve body 210 can be switched on, and newly prepared pure water can be discharged together with the water in the water storage device 300 for the user to take.

When a user starts to take water, if the TDS value detected by the water quality detector 400 is high, which indicates that the water quality is not qualified, the first valve body 210 is closed, so that the newly prepared pure water firstly enters the water storage device 300 through the water storage inlet pipe 310, is mixed with the pure water stored in the water storage device 300 before, and is discharged from the water storage outlet pipe 320 for the user to take. Thus, the TDS of the water discharged from the water storage outlet 302 will be lower than the TDS of the freshly prepared pure water by mixing with the pure water stored in the water storage device 300. Therefore, the TDS value of the head cup water received by the user is prevented from being higher after the head cup is standby for a long time.

Further, if in the water receiving in-process, the TDS value that water quality detector 400 detected reduces to the certain degree after, the qualified back of quality of water promptly, can switch on first valve body 210, and at this moment, the user just can meet simultaneously and get the pure water that is produced by reverse osmosis filter core 120 and the pure water of water storage device 300 exhaust.

The turning on and off of the first valve body 210 may be performed manually by a user or under the control of a controller, which will be described in detail later.

From the purpose of reducing the TDS value of the primary water, it is considered to set the volume of the water storage device 300 to be small, for example, 200ml to 1000ml, and preferably 500ml to 800ml, as long as the volume can be mixed with the primary water with higher TDS value prepared by the reverse osmosis filter element 120 to obtain TDS value meeting the requirement. Thus, the volume of the water purifier can be reduced. The first section of the reverse osmosis filter element 120 has a higher TDS than the second section of the reverse osmosis filter element, and the first section of the reverse osmosis filter element has a higher TDS than the second section of the reverse osmosis filter element.

However, in any case, since the water storage device 300 is involved when the user takes water, the flow rate of the water discharged from the water purifier can be increased. Especially, compared with the existing large-flux water purifier without a water storage device, the flow rate of the two-way water supply is far larger than the flow rate of water supplied by the reverse osmosis filter element 120 alone. Therefore, if the influence on the volume of the water purifier can be not considered, a water storage device with large capacity, such as 1000ml-5000ml, can be adopted.

In summary, when a user takes water, the water quality detector 400 can detect pure water prepared by the reverse osmosis filter element 120 in real time, and can control the on/off of the first valve 210 according to the detection result, thereby determining the water flow direction. If the first section of water prepared by the reverse osmosis filter element 120 has unqualified water quality, the first valve body 210 is cut off, so that the first section of water enters the water storage device 300 and is mixed with the pure water stored in the water storage device, and then the first section of water is taken by a user. If the first section of water prepared by the reverse osmosis filter element 120 is completely conveyed to the water storage device 300, the quality of the continuously prepared pure water is qualified, and the pure water can be directly conveyed to the water outlet end 101. Therefore, the TDS of the head cup water received by the user is prevented from being higher. In addition, when the water quality is qualified, the water taken by the user can be from the water stored in the water storage device 300 and the water newly prepared by the reverse osmosis filter element 120, so that the water yield can be increased. In addition, the water purifier with the structure has simple water paths and a small number of elements, so that the water leakage risk can be reduced.

Preferably, the water purifier may include a controller electrically connected to the water quality detector 400 and the first valve body 210. Wherein, the controller controls the first valve body 210 to be closed when the water quality is determined to be unqualified based on the detection result of the water quality detector 400. When the water quality is determined to be acceptable based on the detection result of the water quality detector 400, the controller controls the first valve body 210 to be opened.

Because the water quality detector 400 detects the water in the pipeline where the water quality detector is located in real time, and the controller also obtains the detection result of the water quality detector 400 in real time, the controller can timely control the first valve body 210 to be switched on and off in the process of taking water by a user. Therefore, even if the water quality changes due to other reasons after the first section of water prepared by the reverse osmosis filter element 120 passes, the first valve body 210 can be timely controlled, so that the user can obtain the pure water meeting the standard during the first section of water prepared by the reverse osmosis filter element 120, and the water received by the user at any time can meet the standard. And the water purifier with the controller can make the judgment on the detection signal more accurate and rapid, and further improves the use experience of users.

Optionally, a second valve body 220 may be disposed on the water storage and inlet pipe 310. The second valve body 220 may be electrically connected to a controller. The second valve body 220 may be any one of or a combination of plural kinds of solenoid valves, electric valves, pneumatic valves, hydraulic valves, and the like as long as the function thereof can be achieved. Wherein, the solenoid valve may include a general solenoid valve and a water inlet solenoid valve.

In one embodiment, the controller controls the second valve body 220 to conduct when receiving the power-on signal. Therefore, the pipeline where the water storage device 300 is located can be communicated between the pure water port 122 of the reverse osmosis filter element 120 and the water outlet end 101, and the water prepared by the reverse osmosis filter element 120 can be mixed with the water prepared in the water storage device 300 and then supplied to a user.

The second valve body 220 has a main function of preventing water in the water storage device 300 from flowing back to the reverse osmosis filter element 120 and flowing out from the concentrate inlet 123 thereof when the water storage device 300 is still water after the engine is stopped, which may result in water waste, especially when the water storage device 300 is a pressure tank. If the second valve body 220 is not provided, the water in the pressure barrel is likely to be drained through the concentrate inlet 123 of the reverse osmosis filter element 120 under the pressure of the pressure barrel. Thus, there is substantially no water available in the water storage device 300 when the next water is to be taken. In addition, through setting up second valve body 220 and can also in time block rivers, avoid the condition emergence that leads to leaking because the unexpected water spot that appears in the purifier pipeline.

In another embodiment, the controller controls the second valve body 220 to conduct when the water quality is determined to be unqualified based on the detection result of the water quality detector 400; and the controller controls the second valve body 220 to be closed when the water quality is determined to be qualified based on the detection result of the water quality detector 400.

After the valve is turned on, the second valve body 220 and the first valve body 210 are in opposite conducting and blocking states. That is, if the water quality is not qualified after starting up, the first section of water is completely injected into the water storage device 300, mixed and diluted and then conveyed to the water outlet end 101; when the water quality is qualified, the pure water newly prepared by the reverse osmosis filter element 120 is directly delivered to the water outlet 101, and simultaneously the water in the water storage device 300 is also delivered to the water outlet 101 through the water storage outlet pipe 320. Thus, after the water quality is qualified, the pure water newly prepared by the reverse osmosis filter element does not flow into the water storage device, so that compared with the previous embodiment in which the second valve body is still opened after the water quality is qualified, the proportion of the newly prepared pure water in the water delivered to the water outlet end 101 is higher, and therefore, the TDS of the water obtained by the water outlet end 101 can be reduced. This is because if the user takes a small amount of water many times and the water in the water storage device 300 is not drained every time the user takes water, the TDS of the water in the water storage device 300 may be continuously increased, and therefore, the proportion of pure water newly prepared in the water acquired by the user is increased, and the TDS of the water acquired by the water outlet end can be reduced.

Further, the water purifier further comprises a detector (not shown) for detecting the amount of water in the water storage device 300. In the case where the water storage device 300 includes a water tank, the detector may be a level meter that reflects the amount of water in the water storage device 300 by detecting the level of water in the water tank. In the case where the water storage device 300 includes a pressure tank, the detector may be a pressure sensor 410, as shown in fig. 3-4. The pressure sensor 410 may be disposed on the water inlet pipe 310, as shown in fig. 3. The pressure sensor 410 may be disposed on the water storage outlet pipe 320, as shown in fig. 4. The pressure sensor 410 reflects the amount of water in the water storage device 300 by detecting the water pressure in the pipe where the water storage device 300 is located. When the water pressure detected by the pressure sensor 410 is higher, it indicates that the water amount in the water storage device 300 is higher; otherwise, it indicates that the water storage device 300 has a small amount of water.

In one embodiment, the controller receives a shutdown signal when the user stops fetching water. The controller controls the second valve body 220 to shut off and shut down the booster pump 110 when it is determined that the amount of water in the water storage apparatus 300 is higher than the upper limit of the amount of water (i.e., the full amount of water) based on the detection result of the detector after receiving the shutdown signal. The shutdown signal is sent when the user closes the water intake device. That is, as soon as the user stops fetching water, the controller will receive the shutdown signal. At this time, the booster pump 110 is not turned off and continues to operate. This allows water to be stored in the water storage device 300. When the controller determines that the amount of water in the water storage device 300 is higher than the upper water amount limit, the second valve body 220 is controlled to be turned off and the booster pump 110 is turned off. At the moment, the water purifier is stopped, and the whole water purifier is in a standby state. The control logic of the scheme is simple and is easy to realize on a circuit.

In another embodiment, during the process of taking water by the user, the water amount in the water storage device 300 may be lower than the lower limit of the water amount due to the larger water taking amount. In this case, the controller may control the second valve body 220 to be turned off when it is determined that the amount of water in the water storage device 300 is lower than the lower water amount limit based on the detection result of the detector (e.g., the pressure sensor 410). That is, after the water in the water storage device 300 is emptied, the second valve 220 is closed, and the reverse osmosis filter element 120 is directly delivered to the water outlet 101. When the user stops taking water, the controller controls the second valve 220 to be switched on when receiving a shutdown signal, and controls the second valve 220 to be switched off and shuts down the booster pump 110 when determining that the water amount in the water storage device 300 is higher than the upper limit of the water amount. That is, after the amount of water in the water storage device 300 reaches the upper limit of the amount of water, the controller controls the second valve body 220 to be closed and shuts down the booster pump 110. At the moment, the water purifier is stopped, and the whole water purifier is in a standby state. Because the water is directly supplied only by the reverse osmosis filter element 120 when the water amount in the water storage device 300 is lower than the lower water amount limit, the water flow is stable, the influence of a pipeline where the water storage device 300 is located on the water flow is not considered, and the scheme is simple.

Optionally, a third valve body 230 may be disposed on the water storage and outlet pipe 320. The third valve body 230 may be electrically connected to a controller. The controller controls the third valve 230 to conduct when receiving the power-on signal. The third valve body 230 may be any one of or a combination of plural kinds of solenoid valves, electric valves, pneumatic valves, hydraulic valves, and the like as long as the function thereof can be achieved. Wherein, the solenoid valve may include a general solenoid valve and a water inlet solenoid valve.

The third valve 230 is mainly used for closing the third valve 230 after the user stops taking water and shutting down the water storage device 300, so that water can be fully stored in the water storage device 300, and thus a higher pressure can be built in the water storage device 300, and the third valve 230 can prevent the high pressure in the water storage device 300 from affecting a downstream high-pressure switch 540 (described later), which results in redesigning a high-pressure switch generally used in the existing water purifier. Moreover, high pressure is established in the water storage device 300 after the power-off, so that water flow can be increased when a user takes water, and the user experience is improved. In addition, the third valve 230 can also block water flow in time, so as to avoid water leakage caused by accidental water leakage points in the pipeline of the water purifier.

In the case where the water purifier includes a detector for detecting the amount of water in the water storage device 300, the controller determines that the amount of water in the water storage device 300 is lower than the lower water amount limit based on the detection result of the detector, and controls the third valve 230 to be turned off. Therefore, the situation that in the process of taking water by a user, after the water in the water storage device 300 is completely taken out, the water prepared by the reverse osmosis filter element 120 flows back into the water storage device 300 through the first valve body 210 due to the low water pressure in the water storage device 300, and the flow rate of the water outlet end 101 is low can be avoided.

In another set of embodiments, a first check valve 510 may be disposed on the water inlet pipe 310, and the first check valve 510 is conducted from the pure water port 122 of the reverse osmosis filter element 120 to the water inlet 301, as shown in fig. 5. Optionally, a second check valve 520 may be disposed on the water storage outlet pipe 320, and a communication direction of the second check valve 520 is from the water storage outlet 302 to the water outlet end 101 of the water purifier. Although in the embodiment shown in fig. 5, both the first check valve 510 and the second check valve 520 are provided. In other embodiments not shown, however, only one of first check valve 510 and second check valve 520 may be provided.

The water storage inlet 301 and/or the water storage outlet 302 of the water storage device 300 are connected with a check valve, so that the water flow direction can be determined in the use process of the water purifier. In the standby state, the first check valve 510 can prevent the water in the pressure tank from flowing back to the pure water port 122 of the reverse osmosis filter element 120 through the water storage inlet pipe 310 and being discharged from the concentrated water port 123 of the reverse osmosis filter element 120, which causes waste of water resources. The second check valve 520 can prevent water prepared by the reverse osmosis filter element 120 from flowing back to the water storage device 300 after passing through the first valve body 210 when a user takes water, so that the flow rate of the water outlet 101 is small.

It should be noted that one or both of the first check valve 510 and the second check valve 520 shown in fig. 5 may be used in combination with any of the embodiments described above. For example, for the embodiments shown in fig. 1-4, a first check valve 510 may be disposed on the water inlet pipe 310 and/or a second check valve 520 may be disposed on the water outlet pipe 320.

Illustratively, the water purifier further comprises a third check valve 530 and a high pressure switch 540, wherein the third check valve 530 is communicated between the water outlet of the first valve body 210 and the water outlet 101 of the water purifier, and the high pressure switch 540 is arranged between the third check valve 530 and the water outlet 101 of the water purifier.

The water purifier with the water outlet end 101 can be provided with a mechanical faucet, and the water purifier is controlled by opening and closing the mechanical faucet.

Specifically, when a user opens the mechanical faucet to take water, the high-pressure switch 540 is closed, the booster pump 110 is started, and the reverse osmosis filter element 120 starts to produce water. The water passage is switched according to the water detection result of the water quality detector 400 with respect to the pure water port 122. When a user closes the mechanical faucet, if the water in the water storage device 300 is not full, the water is stored in the water storage device 300, after the water in the water storage device 300 is full, and the pressure of the water path where the high-pressure switch 540 is located reaches the pressure value at which the high-pressure switch 540 is turned off, the booster pump 110 stops working, and the water purifier enters a standby state.

In this case, the power-on signal and the power-off signal sent to the controller are both from the high voltage switch 540. The high voltage switch 540 sends a power on signal to the controller when closed and sends a power off signal to the controller when the high voltage switch 540 is open.

The water purifier with the structure can be controlled by the mechanical faucet, so that the application range of the water purifier is enlarged, and the water purifier can be applied to various occasions.

Optionally, the water purifier may also be connected to an electrically controlled faucet or a pipeline machine at the water outlet end. The electrically controlled faucet and the line machine may be electrically connected to the controller. In this case, the aforementioned power-on signal and power-off signal sent to the controller are distributed from the electrically controlled faucet or the pipeline machine correspondingly. When a user takes water, the electric control faucet or the pipeline machine is started, and the electric control faucet or the pipeline machine sends a starting signal to the controller. When the user stops getting water, the electric control faucet or the pipeline machine is closed, and the electric control faucet or the pipeline machine sends a shutdown signal to the controller. Through the signal of telecommunication that automatically controlled tap and pipeline machine sent, can directly control booster pump, first valve body, second valve body and third valve body etc. moreover, can also set up the sensor of measuring flow, pressure on the purifier, through the detection of above sensor to the water route, can further promote the function of purifier, make the application range of purifier further enlarge.

According to another aspect of the invention, a control method for the water purifier is also provided. The control method is realized based on the water purifier. The water purifier comprises a booster pump 110, a reverse osmosis filter element 120, a first valve body 210, a water storage device 300 and a water quality detector 400. The first valve body 210 is communicated between the pure water port 122 of the reverse osmosis filter element 120 and the water outlet end 101 of the water purifier. The water storage device 300 comprises a water storage inlet 301 and a water storage outlet 302, wherein the water storage inlet 301 is communicated with the water inlet of the first valve body 210 through a water storage inlet pipe 310, and the water storage outlet 302 is communicated with the water outlet of the first valve body 210 through a water storage outlet pipe 320. The water quality detector 400 is disposed between the pure water port 122 of the reverse osmosis filter element 120 and the water storage inlet 301.

After receiving the starting signal, the control method comprises the following steps:

step S100: the booster pump 110 is started.

Step S200: the water quality detector 400 detects the water quality in the pipeline. Wherein step S100 and step S200 have no chronological order, that is, upon receiving the power-on signal, the booster pump 110 may be simultaneously started and the water quality may be detected.

Step S300: determining whether the water quality is qualified or not based on the detection result of the water quality detector 400, and controlling the first valve body 210 to be conducted if the water quality is qualified; if the water quality is not qualified, the first valve body 210 is controlled to stop.

Thus, when a user starts to take water, if the first section of water prepared by the reverse osmosis filter element 120 has unqualified water quality, the first valve body 210 is cut off, so that the first section of water enters the water storage device 300, is mixed with the pure water stored in the water storage device, and is taken by the user. If the first section of water prepared by the reverse osmosis filter element 120 is completely conveyed to the water storage device 300, the quality of the continuously prepared pure water is qualified, and the pure water can be directly conveyed to the water outlet end 101. Therefore, the TDS of the head cup water received by the user is prevented from being higher.

In one embodiment, in the case that the second valve body 220 is disposed on the water inlet pipe 310, after receiving the power-on signal, the control method further includes:

step S110: the second valve body 220 is controlled to be opened and the amount of water in the water storage device 300 is detected. Step S110 is not in temporal order with step S100 and step S200, and may be performed before, after, or simultaneously with them.

After receiving the shutdown signal, the control method further includes:

step S400: and determining whether the water amount in the water storage device 300 is higher than the upper limit of the water amount, and controlling the second valve body 220 to stop and shutting down the booster pump 110 if the water amount in the water storage device 300 is higher than the upper limit of the water amount. This makes it possible to fill the water storage apparatus 300 with water.

In another embodiment, in the case that the second valve body 220 is disposed on the water inlet pipe 310, after receiving the power-on signal, the control method further includes:

step S110: the second valve body 220 is controlled to be opened and the amount of water in the water storage device 300 is detected.

Step S120: and determining whether the water amount in the water storage device 300 is lower than the lower limit of the water amount, and controlling the second valve body 220 to be closed if the water amount is lower than the lower limit of the water amount.

After receiving the shutdown signal, the control method further includes:

step S400': the second valve body 220 is controlled to be turned on, and when the water amount in the water storage device 300 reaches the upper limit of the water amount, the second valve body 220 is controlled to be turned off and the booster pump 110 is turned off.

Thus, in the process of taking water by the user, if no water is available in the water storage device 300, the second valve 220 is closed, and the water storage device 300 is filled with water by opening again when the user stops taking water.

Optionally, the water storage outlet pipe 320 may be provided with a third valve body 230, in this case:

after receiving the power-on signal, the control method further includes step S130: the third valve body 230 is controlled to be conducted. Step S130 is not temporally sequential to step S110 and may be performed before it, after it, or simultaneously with it.

After receiving the shutdown signal, the control method further includes step S410: the third valve body 230 is controlled to close. Step 410 is not in temporal order with step 400 and step 400', and may be performed before, after, or simultaneously with them.

Further, after receiving the power-on signal, the control method further includes:

step S140: the amount of water in the water storage device 300 is detected.

Step S150: and determining whether the water amount in the water storage device 300 is lower than the lower water amount limit, and controlling the third valve body 230 to be closed if the water amount is lower than the lower water amount limit.

Therefore, the situation that in the process of taking water by a user, after the water in the water storage device 300 is completely taken out, the water prepared by the reverse osmosis filter element 120 flows back into the water storage device 300 through the first valve body 210 due to the low water pressure in the water storage device 300, and the flow rate of the water outlet end 101 is low can be avoided.

In the description of the present invention, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front", "rear", "upper", "lower", "left", "right", "lateral", "vertical", "horizontal" and "top", "bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and in the case of not making a reverse explanation, these directional terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A water purifier comprises a booster pump (110) and a reverse osmosis filter element (120), wherein a water outlet of the booster pump is communicated to a raw water inlet (121) of the reverse osmosis filter element, and the water purifier is characterized by further comprising:

the first valve body (210) is communicated between a pure water port (122) of the reverse osmosis filter element and a water outlet end (101) of the water purifier;

the water storage device (300) comprises a water storage inlet (301) and a water storage outlet (302), the water storage inlet is communicated with the water inlet of the first valve body through a water storage inlet pipe (310), and the water storage outlet is communicated with the water outlet of the first valve body through a water storage outlet pipe (320); and

and the water quality detector (400) is arranged between the pure water port of the reverse osmosis filter element and the water storage inlet.

2. The water purifier according to claim 1, comprising a controller electrically connected to the water quality detector (400) and the first valve (210), wherein the controller controls the first valve to stop when the water quality is determined to be unqualified based on the detection result of the water quality detector; and when the controller determines that the water quality is qualified based on the detection result of the water quality detector, the first valve body is controlled to be conducted.

3. The water purifier as recited in claim 2, wherein a second valve body (220) is disposed on the water inlet pipe (310), the second valve body is electrically connected to the controller, and the controller controls the second valve body to conduct and start the booster pump (110) when receiving a start-up signal.

4. The water purifier as recited in claim 2, wherein a second valve body (220) is arranged on the water storage and inlet pipe (310), the second valve body is electrically connected with the controller, and the controller controls the second valve body to conduct when determining that the water quality is unqualified based on the detection result of the water quality detector; and the controller controls the second valve body to stop when the water quality is determined to be qualified based on the detection result of the water quality detector.

5. Water purifier according to claim 3 or 4, further comprising a detector for detecting the amount of water in said water storage means (300), wherein

And after the controller receives a shutdown signal, when the water quantity in the water storage device is determined to be higher than the upper water quantity limit based on the detection result of the detector, the second valve body (220) is controlled to stop and the booster pump is shut down.

6. Water purifier according to claim 3 or 4, further comprising a detector for detecting the amount of water in said water storage means (300), wherein

The controller determines that the water quantity in the water storage device is lower than the lower water quantity limit based on the detection result of the detector, and controls the second valve body (220) to be closed; and is

And the controller controls the second valve body to be communicated when receiving a shutdown signal, and controls the second valve body to be stopped and stops the booster pump when determining that the water quantity in the water storage device is higher than the upper limit of the water quantity.

7. The water purifier according to claim 1, wherein a third valve (230) is disposed on the water storage and outlet pipe (320), the third valve is electrically connected to the controller, and the controller controls the third valve to conduct when receiving a power-on signal; and the controller controls the third valve body to close when receiving a shutdown signal.

8. The water purifier as recited in claim 7, further comprising a detector for detecting the amount of water in the water storage device (300), wherein the controller controls the third valve (230) to be closed when the controller determines that the amount of water in the water storage device is lower than the lower limit of the amount of water based on the detection result of the detector.

9. The water purifier according to any one of claims 5-6 and 8, wherein the detector comprises a pressure sensor (410) arranged at the water inlet pipe (310) or the water outlet pipe (320).

10. The water purification of claim 1, wherein the water storage means (300) comprises a pressure tank.

11. The water purifier of claim 1,

a first check valve (510) is arranged on the water storage inlet pipe (310), and the conduction direction of the first check valve is from a pure water port (122) of the reverse osmosis filter element (120) to the water storage inlet (301); and/or

The water storage outlet pipe (320) is provided with a second check valve (520), and the conduction direction of the second check valve is from the water storage outlet (302) to the water outlet end (101) of the water purifier.

12. The water purifier of claim 1, wherein the water quality detector (400) comprises a TDS probe.

13. The water purifier of claim 1, further comprising a third check valve (530) in communication between the outlet of the first valve body (510) and the outlet end (101) of the water purifier, and a high pressure switch (540) disposed between the third check valve and the outlet end of the water purifier.

14. A control method for a water purifier, wherein the water purifier comprises a booster pump (110) and a reverse osmosis filter element (120), a water outlet of the booster pump is communicated to a raw water inlet (121) of the reverse osmosis filter element, and the water purifier further comprises:

the water storage device (300) comprises a water storage inlet (301) and a water storage outlet (302), the water storage inlet is communicated with the water inlet of the first valve body (210) through a water storage inlet pipe (310), and the water storage outlet is communicated with the water outlet of the first valve body through a water storage outlet pipe (320); and

a water quality detector (400) arranged between the pure water port of the reverse osmosis filter element and the water storage inlet,

the control method comprises the following steps:

starting the booster pump when a starting signal is received;

the water quality detector detects the water quality in the pipeline; and

determining whether the water quality is qualified or not based on the detection result of the water quality detector, and controlling the first valve body to be conducted if the water quality is qualified; and if the water quality is unqualified, controlling the first valve body to stop.

15. The control method as claimed in claim 14, wherein a second valve body (220) is provided on the water storage and inlet pipe (310),

after the startup signal is received, the control method further comprises the steps of controlling the second valve body to be conducted and detecting the water quantity in the water storage device (300);

after receiving the shutdown signal, the control method further includes: and determining whether the water quantity in the water storage device is higher than the upper limit of the water quantity, and if the water quantity in the water storage device is higher than the upper limit of the water quantity, controlling the second valve body to stop and stopping the booster pump.

16. The control method as claimed in claim 14, wherein a second valve body (220) is provided on the water storage and inlet pipe (310),

after receiving the boot signal, the control method further includes:

controlling the second valve body to be conducted, and detecting the water quantity in the water storage device (300);

determining whether the water quantity in the water storage device is lower than a water quantity lower limit, and if the water quantity is lower than the water quantity lower limit, controlling the second valve body to stop; and is

And when the shutdown signal is received, the second valve body is controlled to be conducted, and when the water quantity in the water storage device reaches the upper limit of the water quantity, the second valve body is controlled to be stopped and the booster pump is shut down.

17. The control method as claimed in claim 14, wherein the water storage and outlet pipe (320) is provided with a third valve body (230),

after receiving the power-on signal, the control method further comprises controlling the third valve body to conduct,

after receiving a shutdown signal, the control method further includes controlling the third valve body to close.

18. The control method of claim 17, wherein after receiving the power-on signal, the control method further comprises:

detecting the amount of water in the water storage device (300);

and determining whether the water quantity in the water storage device is lower than a water quantity lower limit, and if the water quantity is lower than the water quantity lower limit, controlling the third valve body (230) to be stopped.