CN213171593U - Water purifier - Google Patents

Abstract

The utility model provides a water purifier, which comprises a water inlet electromagnetic valve and a reverse osmosis filter element, wherein a water outlet of the water inlet electromagnetic valve is communicated with a raw water port of the reverse osmosis filter element, and a concentrated water port of the reverse osmosis filter element is only communicated with a wastewater ratio valve; the purifier still includes: and the controller is electrically connected with the water inlet electromagnetic valve and is used for controlling the water inlet electromagnetic valve to be cut off according to an electric signal indicating the end of flushing. Compared with the prior art, the concentrated water gap of the reverse osmosis filter element of the water purifier is only communicated with a waste water ratio valve, so that the use of a flushing valve in the water purifier is reduced, the structure of the water purifier is simplified, and the cost, the water leakage rate and other fault rates of the water purifier are reduced on the premise that the reverse osmosis filter element can be flushed.

Description

Water purifier

Technical Field

The utility model relates to a technical field of aqueous cleaning specifically, relates to a 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.

The reverse osmosis water purifier utilizes the reverse osmosis filter element to filter raw water flowing into a raw water port of the reverse osmosis water purifier and generate pure water, and simultaneously, generated concentrated water is discharged from a concentrated water port. The concentrated water port of the existing reverse osmosis water purifier is connected with a waste water combination valve. The waste water combination valve comprises a waste water ratio valve and a flushing valve which are connected in parallel. When the water purifier normally produces water, the flushing valve is closed, and concentrated water can be discharged only through the waste water ratio valve. When the purifier washed, the flushometer was opened, because the discharge flow capacity when the flushometer was opened was greater than waste water than the valve, so when the flushometer was opened, will have a large amount of rivers to flow through the reverse osmosis filter core, wash the reverse osmosis filter core.

However, the waste water combination valve has a complicated internal structure and is difficult to assemble. This not only causes the manufacturing cost improvement of purifier, makes the fault rate such as purifier leak moreover improve.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems in the prior art, the utility model provides a water purifier, which comprises a water inlet electromagnetic valve and a reverse osmosis filter element, wherein the water outlet of the water inlet electromagnetic valve is communicated with the raw water port of the reverse osmosis filter element, and the concentrated water port of the reverse osmosis filter element is only communicated with a wastewater ratio valve; the purifier still includes: and the controller is electrically connected with the water inlet electromagnetic valve and is used for controlling the water inlet electromagnetic valve to be cut off according to an electric signal indicating the end of flushing.

Compared with the prior art, the concentrated water gap of the reverse osmosis filter element of the water purifier is only communicated with a waste water ratio valve, so that the use of a flushing valve in the water purifier is reduced, the structure of the water purifier is simplified, and the cost, the water leakage rate and other fault rates of the water purifier are reduced on the premise that the reverse osmosis filter element can be flushed.

Exemplarily, the water purifier further comprises a booster pump, a water outlet of the water inlet electromagnetic valve is communicated with a raw water port of the reverse osmosis filter element through the booster pump, and the water purifier further comprises a water outlet control device communicated with a pure water port of the reverse osmosis filter element; the controller is also electrically connected with the water outlet control device and the booster pump, and is also used for controlling the booster pump to start working when an electric signal indicating that water taking is started is received from the water outlet control device, and controlling the booster pump to stop working when an electric signal indicating that water taking is stopped is received from the water outlet control device.

Therefore, the water purifier with the booster pump can improve the filtering efficiency of the reverse osmosis filter element. And, the purifier that the intercommunication has out water controlling means can send the operation of user to the purifier to the controller with the form of electric signal, and each device including the booster pump carries out automatic control to the purifier through the controller again. Particularly, after receiving an electric signal indicating that water taking is stopped from the water outlet control device, the booster pump is controlled to stop working in time. Therefore, the situation that under the condition that the water purifier does not provide pure water for users any more, all raw water is discharged only through the waste water ratio valve with smaller flux, so that the pressure in the reverse osmosis filter element is suddenly increased, and the service life of the reverse osmosis filter element is shortened is avoided.

Illustratively, the water purifier further comprises a first timer electrically connected to the outlet control device and the controller, the first timer being configured to start timing after receiving an electrical signal from the outlet control device indicating that water intake is stopped, and to send an electrical signal to the controller indicating that flushing is finished after a first time period from receiving the electrical signal indicating that water intake is stopped.

Therefore, the water purifier provided with the first timer can determine the flushing time through the time threshold, and the control logic is simple, effective and easy to implement.

Illustratively, the first timer and the controller are integrated on the same chip.

The first timer and the controller are integrated on the same chip, so that the integration level of the product is improved, the assembly difficulty and the failure rate are reduced, and the communication cost among devices in the water purifier is reduced.

Illustratively, the purifier still includes the check valve, and the play water controlling means is high pressure switch, and the water inlet of check valve communicates the pure water mouth of reverse osmosis filter core, and the delivery port of check valve communicates the intake of purifier, and high pressure switch sets up between check valve and intake.

Therefore, the water purifier with the check valve and the high-pressure switch can be connected with a common water faucet at a water inlet. Through the control of the common faucet, the automatic control of water making and water taking stopping of the water purifier can be completed, so that the water purifier is wider in application range.

Illustratively, the water outlet control device is an electrically controlled faucet, which is arranged at the water intake of the water purifier.

The electrically controlled faucet itself can correspondingly send electric signals to the controller indicating the start of water intake and the stop of water intake, respectively, in response to the water intake and water shut-off operations of the user, without performing an action by means of the pressure in the pipeline. The water purifier with the water purifier has few parts on the pipeline and simple control logic.

The water purifier also comprises a flow meter, the flow meter is arranged on a main water pipeline between a water inlet of the water purifier and a raw water port of the reverse osmosis filter element and/or a concentrated water pipeline between a concentrated water port of the reverse osmosis filter element and a water outlet of the water purifier, the flow meter is electrically connected with the controller, and the flow meter is used for detecting water flow on the pipeline and sending a flow signal to the controller; the controller is also configured to generate an electrical signal indicative of the end of the flush based on the flow signal and the electrical signal indicative of the cessation of water intake.

Therefore, the water purifier with the flow meter can control the water inlet electromagnetic valve according to the flow of water in the pipeline where the flow meter is located. In the area with unstable water pressure, the phenomena of incomplete flushing or water resource waste caused by unstable flushing water quantity due to overlarge pressure or undersize pressure can be avoided. Therefore, the flushing operation of the water purifier can be controlled more accurately.

Illustratively, a filter element shell is arranged outside the reverse osmosis filter element, and a concentrated water outlet end is arranged on the filter element shell; wherein, the waste water than the valve setting in the filter core casing, and the waste water than the valve intercommunication between dense mouth of a river and dense water outlet end, be provided with the orifice on the waste water than the valve.

Like this, waste water is than the valve can be in the same place with the reverse osmosis filter core is integrated, improves the integrated level of reverse osmosis filter core, when changing the reverse osmosis filter core, and waste water is than the valve also can be changed along with the reverse osmosis filter core together, has reduced the time cost that the user maintained the purifier, has improved user experience.

Illustratively, the wastewater ratio valve is arranged on a concentrate pipeline between a concentrate water port of the reverse osmosis filter element and a water outlet of the water purifier.

The waste water is than the valve can be installed on the pipeline of purifier as an independent device, is favorable to changing and maintaining it to, can also change the through-flow of reverse osmosis filter core through changing the waste water of different diameter orifices than the valve. In addition, the damage of the reverse osmosis filter element caused by the blockage of the waste water ratio valve by the scale after long-time use can be avoided.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention 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 present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

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

fig. 2 is a schematic water path diagram of a water purifier according to another exemplary embodiment of the present invention;

fig. 3 is a cross-sectional view of a reverse osmosis cartridge according to an exemplary embodiment of the present invention; and

fig. 4 is an enlarged view of a portion of the reverse osmosis cartridge of fig. 3.

Wherein the figures include the following reference numerals:

100. 100', a water purifier; 101. a water inlet; 102. a water intake; 103. a water outlet; 110. a main water line; 120. a concentrated water pipeline; 200. a water inlet electromagnetic valve; 300. a reverse osmosis filter element; 301. a raw water port; 302. a pure water port; 303. a dense water port; 310. a filter element housing; 311. a concentrated water outlet end; 400. a waste water ratio valve; 401. an orifice; 500. a booster pump; 600. a check valve; 710. a high voltage switch; 720. an electrically controlled faucet; 800. a flow meter.

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 illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

The utility model provides a water purifier, as shown in the figure 1-2. As shown in fig. 1, the water purifier 100 includes a water inlet solenoid valve 200 and a reverse osmosis filter 300. The water inlet solenoid valve 200 may be any solenoid valve capable of switching on and off the water flow in the water purifier 100, and the water inlet thereof may be communicated with the water inlet 101 of the water purifier. The water outlet of the water inlet electromagnetic valve 200 is communicated with the raw water port 301 of the reverse osmosis filter element 300. Reverse osmosis cartridge 300 is the primary filtration element of water purifier 100. After raw water enters the reverse osmosis filter element 300 from the raw water port 301 of the reverse osmosis filter element 300, pure water generated by filtration is discharged through the pure water port 302 to flow out through the water intake port 102 of the water purifier 100; the concentrate that has not passed through the reverse osmosis filter element 300 is discharged through the concentrate outlet 303 thereof. The concentrate inlet 303 of the reverse osmosis filter element 300 is only communicated with the waste water ratio valve 400, and is not communicated with other valves. The waste water ratio valve 400 may be disposed at any position downstream of the concentrate outlet 303. The waste water ratio valve 400 is used for the reverse osmosis filter element 300 to drain. The flow rate of the wastewater through the valve 400 may be much less than the through flow rate of the reverse osmosis filter element 300, and the wastewater through the valve 400 may also be used to throttle the discharged concentrate, thereby increasing the pressure inside the reverse osmosis filter element 300. Specifically, the larger the opening of the waste water ratio valve 400, the smaller the pressure generated inside the reverse osmosis filter cartridge 300 during the filtration process. The lower the pressure, the less pure water is taken in by the pure water port 302 and more water is discharged through the concentrate port 303. If the waste water is blocked from the opening of the valve 400, although the pressure in the reverse osmosis filter element 300 can be built up and can be raised to a high level, under the action of the pressure, more pure water will be generated, but since no concentrated water is discharged, all impurities in the raw water which can be filtered will quickly block the reverse osmosis filter element 300, so that the service life of the reverse osmosis filter element 300 is greatly shortened. The setting of the opening size of the waste water ratio valve 400 is required to balance the pure water outflow rate and the service life of the reverse osmosis cartridge 300.

The water purifier 100 further comprises a controller. The controller is electrically connected with the water inlet electromagnetic valve 200 and can control the on and off of the water inlet electromagnetic valve 200. In the normal water production process of the water purifier 100, the water inlet solenoid valve 200 is in a conducting state, and the reverse osmosis filter element 300 performs the filtering operation normally. Pure water is discharged from the pure water port 302, and concentrated water is discharged from the concentrated water port 303 under the throttling action of the waste water ratio valve 400. The inlet solenoid valve 200 may remain in the on state for a period of time, i.e., a delayed cutoff, after the user stops drawing water. In this time period, the water purifier is in a flushing state. Since the water intake is stopped, the pure water port 302 does not discharge water, and the raw water enters the reverse osmosis filter element from the raw water port 301, and then the raw water replaces the concentrated water stored in the reverse osmosis filter element 300, and the concentrated water is discharged from the wastewater ratio valve 400 by the raw water. Since the concentrated water is water having a high concentration of ions left by filtering pure water, the raw water has a lower ion concentration than the concentrated water. Thus, the reverse osmosis filter element 300 can be washed by using raw water, and the ion concentration of water in the reverse osmosis filter element 300 can be reduced. The controller may control the water inlet solenoid valve 200 to be turned off according to an electric signal indicating that the flushing is finished, so that the water purifier 100 finishes the flushing state and enters the standby state. The electric signal indicating the end of flushing may be any signal indicating the end of flushing state, such as a time signal, a flow rate signal of flushing water, etc.

The water purifier in the prior art is mostly provided with a wastewater combination valve communicated with a concentrated water port. In the waste water combination valve, a waste water ratio valve is connected with a flushing valve in parallel. In the process of producing water by the reverse osmosis filter element, the flushing valve is closed, and concentrated water is discharged only by the waste water ratio valve. In a flushing state, the flushing valve is communicated, and raw water entering the reverse osmosis filter element is discharged from the flushing valve after flushing the reverse osmosis filter element. After the flushing is completed and before the next water intake, the flush valve is again closed. Compared with the prior art, according to the reverse osmosis filter core 300 of this application embodiment's dense mouth of a river 303 only communicates there is waste water than valve 400, has reduced the use of flushometer in purifier 100 to simplify the structure of purifier 100, still can be to reverse osmosis filter core 300 under the prerequisite of washing, reduced the cost of purifier and fault rates such as leak.

Illustratively, the water purifier 100 further comprises a booster pump 500, and the water outlet of the water inlet solenoid valve 200 is communicated with the raw water port 301 of the reverse osmosis filter element 300 through the booster pump 500. The booster pump 500 may increase the pressure of the raw water entering the reverse osmosis filter element 100, and increase the filtering efficiency of the reverse osmosis filter element 100. The water purifier 100 further comprises a water outlet control device communicated with the pure water port 302 of the reverse osmosis filter element 300. The water outlet control device is used for responding to the water taking or water closing operation of a user and correspondingly sending electric signals for starting water taking and stopping water taking. The water outlet control device may be various and will be described in detail below.

The controller may also electrically connect the outlet control device and the booster pump 500. In this case, the controller is also configured to control the booster pump 500 to start operating upon receiving an electric signal indicating the start of water intake from the water outlet control means, whereupon the pure water port 302 of the reverse osmosis filter element 100 discharges the pure water. And the controller is also used for controlling the booster pump 500 to stop working when an electric signal indicating that water taking is stopped is received from the water outlet control device. After the booster pump 500 stops operating, the reverse osmosis filter cartridge 100 does not produce pure water. If the water inlet solenoid valve 200 is kept in the on state, the raw water can still enter the reverse osmosis filter element 300. Under the pressure of tap water, the incoming raw water can flush the reverse osmosis filter element 300, and the concentrated water in the reverse osmosis filter element 100 is discharged from the concentrated water outlet 303.

The controller can be built by adopting electronic elements such as a comparator, a register, a digital logic circuit and the like, or can be realized by adopting processor chips such as a singlechip, a microprocessor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), an Application Specific Integrated Circuit (ASIC) and the like and peripheral circuits thereof.

Accordingly, the water purifier 100 having the booster pump 500 can improve the filtration efficiency of the reverse osmosis filter element 100. The water purifier 100 connected to the water outlet control device may send the operation of the water purifier by the user to the controller in the form of an electric signal, and the controller may automatically control each device of the water purifier 100 including the booster pump 500. In particular, the booster pump 500 is controlled to stop operating in time upon receiving an electric signal indicating that water intake is stopped from the water outlet control device. Therefore, the situation that under the condition that the water purifier does not provide pure water for users any more, all raw water is discharged only through the waste water ratio valve with smaller flux, so that the pressure in the reverse osmosis filter element 300 is suddenly increased, and the service life of the reverse osmosis filter element is shortened is avoided.

Illustratively, water purifier 100 also includes a first timer. The first timer is electrically connected with the water outlet control device and the controller. The first timer is used for starting timing after receiving an electric signal indicating that water taking is stopped from the water outlet control device, and sending an electric signal indicating that flushing is finished to the controller after receiving a first time period after receiving the electric signal indicating that water taking is stopped. For example, when the user closes the faucet and stops taking water (or simply turns off water), the water outlet control device sends an electric signal indicating that water taking is stopped, and the first timer starts to count time. The first time period can be preset, and the water purifier is in a flushing state in the first time period. After a first period of time, the first timer sends an electrical signal to the controller indicating the end of the flush. After receiving the electric signal indicating the end of the flushing, the controller may control the water inlet solenoid valve 200 to be turned off to end the flushing state of the water purifier.

Therefore, the water purifier provided with the first timer can determine the flushing time through the time threshold, and the control logic is simple, effective and easy to implement.

Illustratively, the first timer and the controller are integrated on the same chip. For example, the first timer and the controller are implemented by the same FPGA. The first timer and the controller are integrated on the same chip, so that the integration level of the product is improved, the assembly difficulty and the failure rate are reduced, and the communication cost among devices in the water purifier is reduced.

Illustratively, the water purifier 100 further comprises a check valve 600, and the water outlet control device is a high-pressure switch 710, as shown in fig. 1. The water inlet of the check valve 600 is communicated with the pure water inlet 302 of the reverse osmosis filter element 300, and the water outlet of the check valve 600 is communicated with the water intake 102 of the water purifier 100. A high pressure switch 710 is provided between the non-return valve 600 and the intake 102. When the user stops taking water, the faucet is closed, the booster pump 500 continues to produce water to the water intake 102, and the high-pressure switch 710 is turned off until the pressure between the check valve 600 and the water intake 102 rises to the off pressure value of the high-pressure switch 710. At this point, the high voltage switch 710 sends an electrical signal to the controller indicating that water intake is stopped. After the controller receives the electric signal indicating that the water intake is stopped, the controller controls the booster pump 500 to stop working, and then enters the flushing state described above, which is not described in detail.

Therefore, the water purifier 100 having the check valve 600 and the high pressure switch 710 can be connected to a common water tap at the water intake 102. By controlling the common faucet, the automatic control of water making and water taking stopping of the water purifier 100 can be completed, so that the water purifier 100 has a wider application range.

In another embodiment, as shown in FIG. 2, the outlet control device may be an electrically controlled faucet 720. An electrically controlled faucet 720 is provided at the intake 102 of the water purifier 100'. The electrically controlled faucet 720 itself can correspondingly send electrical signals to the controller indicating the start of water intake and the stop of water intake, respectively, in response to the user's water intake and water shut-off operations, without performing an action by means of the pressure in the conduit. The water purifier 100' with the arrangement has few parts on pipelines and simple control logic.

Illustratively, as shown in fig. 2, the water purifier 100' may further include a flow meter 800. The flow meter 800 may be provided on the main water line 110 between the water inlet 101 of the water purifier 100 'and the raw water port 301 of the reverse osmosis cartridge 300 and/or on the concentrate line 120 between the concentrate water port 303 of the reverse osmosis cartridge 300 and the water outlet 103 of the water purifier 100'. The flow meter 800 is also electrically connected to the controller, and the flow meter 800 is configured to detect the flow of water on the line in which it is located and send a flow signal to the controller. The controller may also be configured to generate an electrical signal indicative of the end of the flush based on the flow signal. The flow meter 800 is provided on the concentrate line 120 as an example. After the water purifier 100' enters the flushing state, the concentrate line 120 discharges the concentrate discharged through the concentrate port 303. The flow meter 800 records the flow value of the water flowing through it while sending a flow signal to the controller. The controller determines the amount of water to be discharged through the concentrate outlet 303 after the water intake is stopped, based on the flow rate signal and an electric signal received from the outlet control device indicating that the water intake is stopped. When the water volume exceeds the preset flow threshold, the controller may determine that the concentrated water produced from the produced water in the reverse osmosis filter element 300 has been drained, and, alternatively, that the reverse osmosis filter element 300 has been filled with tap water. Thus, the controller may generate an electrical signal indicating the end of the flush.

Therefore, the water purifier 100' with the flow meter 800 can control the water inlet electromagnetic valve 200 according to the flow rate of the water in the pipeline where the flow meter 800 is located. In the area with unstable water pressure, the phenomena of incomplete flushing or water resource waste caused by unstable flushing water quantity due to overlarge pressure or undersize pressure can be avoided. Therefore, the flushing operation of the water purifier can be controlled more accurately.

In one embodiment, as shown in fig. 3-4, the reverse osmosis filter element 300 is provided with a filter element housing 310 on the outside, and a concentrate outlet 311 is provided on the filter element housing 310. The concentrate outlet 311 is an end from which concentrate is discharged. A waste water ratio valve 400 is disposed within the cartridge housing 310, and the waste water ratio valve 400 communicates between the concentrate port 303 and the concentrate outlet end 311. The waste water ratio valve 400 may be a flow divider provided in the cartridge housing 310, the flow divider may be used to divide the cartridge housing 310 into a pure water region and a concentrated water region which are not communicated with each other, and an orifice 401 is provided in the waste water ratio valve 400. The orifice 401 may communicate the concentrate region with the concentrate outlet 311. The concentrate discharged from the reverse osmosis filter element 300 is discharged through the orifice 401.

Like this, waste water is than valve 400 can be in the same place with reverse osmosis filter core 300 is integrated, improves reverse osmosis filter core 300's integrated level, when changing reverse osmosis filter core 300, and waste water is than valve 400 also can be changed along with reverse osmosis filter core 300 together, has reduced the time cost that the user maintained the purifier, has improved user experience.

In another embodiment, as shown in fig. 1-2, a waste water ratio valve 400 is disposed on the concentrate line 120 between the concentrate port 303 of the reverse osmosis cartridge 300 and the drain port 103 of the water purifier 100. The waste water ratio valve 400 can be installed as a separate device on the pipeline of the water purifier 100, which is beneficial for replacing and maintaining the waste water ratio valve, and the flow rate of the reverse osmosis filter element 300 can be changed by replacing the waste water ratio valve 400 with different diameter throttling holes. In addition, damage to the reverse osmosis filter element 300 due to clogging of the waste water ratio valve 400 by scale after a long time use can be prevented.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words 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 interpreted 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 described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to 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 more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A water purifier comprises a water inlet electromagnetic valve (200) and a reverse osmosis filter element (300), wherein the water outlet of the water inlet electromagnetic valve is communicated with a raw water inlet (301) of the reverse osmosis filter element,

the concentrated water port (303) of the reverse osmosis filter element is only communicated with a waste water ratio valve (400);

the water purifier further comprises:

and the controller is electrically connected with the water inlet electromagnetic valve and is used for controlling the water inlet electromagnetic valve to be cut off according to an electric signal indicating the end of flushing.

2. The water purification machine according to claim 1, further comprising a booster pump (500), wherein the water outlet of the water inlet solenoid valve (200) is communicated with the raw water port (301) of the reverse osmosis filter element (300) via the booster pump,

the water purifier also comprises a water outlet control device communicated with a pure water port (302) of the reverse osmosis filter element;

the controller is also electrically connected with the water outlet control device and the booster pump, and is also used for controlling the booster pump to start working when the controller receives an electric signal indicating that water is taken from the water outlet control device, and controlling the booster pump to stop working when the controller receives an electric signal indicating that water is taken from the water outlet control device.

3. The water purifier of claim 2, further comprising a first timer electrically coupled to the outlet control device and the controller, the first timer configured to begin timing after receiving the electrical signal from the outlet control device indicating a cessation of water intake and to send the electrical signal to the controller indicating an end of flushing after a first time period from receiving the electrical signal indicating a cessation of water intake.

4. The water purifier of claim 3, wherein the first timer and the controller are integrated on a same chip.

5. The water purification machine according to claim 2, further comprising a non-return valve (600), wherein said water outlet control means is a high pressure switch (710), the water inlet of said non-return valve is connected to the pure water port (302) of said reverse osmosis cartridge (300), the water outlet of said non-return valve is connected to the water intake (102) of said water purification machine, and said high pressure switch is arranged between said non-return valve and said water intake.

6. The water purification machine according to claim 2, wherein said water outlet control means is an electrically controlled tap (720) arranged at a water intake (102) of said water purification machine.

7. The water purification machine according to claim 2, further comprising a flow meter (800) arranged on the main water line (110) between the water inlet (101) of the water purification machine and the raw water port (301) of the reverse osmosis cartridge (300) and/or on the concentrate line (120) between the concentrate port (303) of the reverse osmosis cartridge and the water outlet (103) of the water purification machine, the flow meter being electrically connected to the controller, the flow meter being adapted to detect the flow of water on the line and to send a flow signal to the controller;

the controller is further configured to generate the electrical signal indicative of the end of the flush based on the flow signal and the electrical signal indicative of the cessation of water intake.

8. The water purifier as recited in claim 1 or 2, characterized in that a filter element shell (310) is arranged outside the reverse osmosis filter element (300), and a concentrated water outlet end (311) is arranged on the filter element shell;

the waste water ratio valve (400) is arranged in the filter element shell and communicated between the thick water port (303) and the thick water outlet end, and an orifice (401) is arranged on the waste water ratio valve.

9. The water purification machine according to claim 1 or 2, wherein the waste water ratio valve (400) is arranged on a concentrate line (120) between a concentrate port (303) of the reverse osmosis cartridge (300) and a drain port (103) of the water purification machine.

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