CN212924590U - Water purifier - Google Patents

Abstract

The utility model provides a water purifier, including the main water pipeline at intercommunication water inlet and intake, booster pump and reverse osmosis filter core have set gradually along the rivers direction on the main water pipeline, and water purifier is still including flushing the pipeline, and the first end that washes the pipeline feeds through to the pipeline section at booster pump upper reaches on the main water pipeline, and the second end that washes the pipeline feeds through to the former mouth of a river of reverse osmosis filter core, sets gradually from the direction of first end to second end on flushing the pipeline and washes the solenoid valve and wash the filter core. This purifier wash the filter core can be under the effect that does not have booster pump or other supercharging devices, only through the pressure in the running water, just make and wash the filter core and produce the pure water, utilize the pure water to wash the reverse osmosis filter core. Avoid the user to connect and get the higher first section water of TDS, simplified the water route of purifier, also reduced the burden of booster pump, prolonged life, also reduced the noise when washing, improved user's use and experienced.

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 for quality of life, the water quality is getting more attention. Reverse osmosis water purifiers are becoming more popular because the purified water produced by them is fresher, more sanitary and safer.

The raw water has higher TDS (total dissolved solids) more, and the reverse osmosis filter core can block a large amount of ions in the raw water before the osmotic membrane under the effect of booster pump, and makes the TDS of the water through the osmotic membrane accord with the standard of straight drinking water. Meanwhile, the reverse osmosis filter element can discharge high-TDS concentrated water according to a certain proportion when the direct drinking water is prepared. In the process of water production, although concentrated water can be discharged through a concentrated water pipeline, a small amount of concentrated water still remains in the reverse osmosis filter element before the reverse osmosis membrane after the water production is finished. After long-time shutdown, according to the principle that ions are diffused from high-concentration solution to low-concentration solution, the ions in the concentrated water in front of the membrane can be diffused into the directly drinking water purified behind the membrane, so that the purified directly drinking water is polluted. When the next water intaking, the direct drinking water after being polluted will flow out together with the direct drinking water of new system, makes the TDS of the first section water of making be higher than the standard value, influences user's use and experiences.

In order to solve the above problems, a flushing filter element for flushing the reverse osmosis filter element may be provided, and the same reverse osmosis filter element is also used for the flushing filter element in order to ensure the cleanness of the flushing water. Therefore, the booster pump is required to pressurize the raw water entering the flushing filter element during flushing, and the flushing operation can be carried out. Therefore, the water path is complex, the burden of the booster pump is increased, the working time of the booster pump is prolonged, and the service life of the booster pump is shortened.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the prior art at least partially, according to the utility model discloses an aspect provides a water purifier, including the main water pipeline at intercommunication water inlet and intake, booster pump and reverse osmosis filter core have set gradually along the rivers direction on the main water pipeline, and the water purifier is still including washing the pipeline, and the first end that washes the pipeline feeds through to the pipeline section at booster pump upper reaches on the main water pipeline, and the second end that washes the pipeline feeds through to the former mouth of a river of reverse osmosis filter core, sets gradually from the direction of first end to second end on washing pipeline and washes the solenoid valve and wash the filter core.

The flushing filter element of the water purifier can only generate pure water through the pressure in tap water under the action of no booster pump or other supercharging devices, and the pure water is utilized to flush the reverse osmosis filter element. Through the reverse osmosis filter core that washes, can effectively avoid dense water to see through the reverse osmosis filter core through the osmosis, pollute the pure water behind its membrane, lead to TDS to rise. Therefore, the first section of water with higher TDS is prevented from being received when the user gets water next time. And, this purifier has further simplified the water route of purifier, has also reduced the burden of booster pump, makes it be in the stall state in the stage of washing, has reduced its operating duration, has prolonged life, has also reduced the noise when washing, can wash the reverse osmosis filter core even be in under being close to the silence state, has improved user's use experience.

Illustratively, the flushing filter core is a nanofiltration filter core or a reverse osmosis filter core with the flux less than 100G, a raw water port of the flushing filter core is communicated with a flushing electromagnetic valve, and a pure water port of the flushing filter core is communicated with a raw water port of the reverse osmosis filter core.

The washing filter core is set to be a nanofiltration filter core or a reverse osmosis filter core with smaller flux, the water purification process can be completed by using tap water pressure, a booster pump or a supercharging device is not required to be arranged, the water channel is reduced, and the cost is reduced.

Illustratively, the water purifier also comprises a controller, the controller is electrically connected with the water outlet control device and the flushing electromagnetic valve, and the controller controls the flushing electromagnetic valve to be conducted after the controller receives the water taking stopping electric signal from the water outlet control device and a first time threshold value is passed; the controller controls the flushing solenoid valve to be cut off after the flushing solenoid valve leads through the second time threshold or according to the detection signal received by the self-detection device.

Therefore, the water purifier with the arrangement can automatically flush the reverse osmosis filter element of the water purifier, and can also adjust and set a preset threshold value through the controller, for example, a preset time period, a preset TDS value, a preset water flow threshold value and the like, so that the flushing time of the water purifier is controlled, and the logic relation among devices in the water purifier is simplified.

For example, when the controller receives the electric signal for starting water intake from the water outlet control device, the controller controls the flushing solenoid valve to be cut off and controls the booster pump to be started when the flushing solenoid valve is in a conducting state.

Therefore, the user can timely access the pure water when the water purifier is in the flushing stage, and the waiting time of the user is reduced.

Illustratively, the water outlet control device is a high pressure switch or an electrically controlled faucet.

If the water outlet control device is a high-pressure switch, a water intake of the water purifier can be communicated with the mechanical faucet, so that the application range of the water purifier is expanded. If the water outlet control device is an electric control faucet, the state of the water purifier can be directly operated through the electric control faucet, and the logical relation between the controller in the water purifier and each execution device is effectively simplified.

Illustratively, the detection device is a water quality detector which is arranged at the concentrated water port of the reverse osmosis filter element and is used for detecting the total amount of the soluble solids of the water at the concentrated water port of the reverse osmosis filter element, the water quality detector is electrically connected with the controller, and the detection signal comprises information about the total amount of the soluble solids.

It can be seen from this that the flushing solenoid valve is controlled to be turned off by using the detection result of the water quality detector. Can directly ensure that the concentrated water in the reverse osmosis filter element is completely discharged and the reverse osmosis filter element is washed clean. The problem that the water quality of water discharged by the reverse osmosis filter element reaches a preset TDS value, and the flushing solenoid valve is in a conducting state and continues to flush, so that resource waste is avoided; on the other hand, the water discharged by the reverse osmosis filter element is prevented from not reaching the preset TDS value, the flushing electromagnetic valve is cut off, and the flushing stage is finished. The diffusion phenomenon still appears in making the reverse osmosis filter core, and the user receives the higher first section water of TDS value, influences the user and uses.

Illustratively, the detection means is a flow meter for detecting a water flow rate of the flushing line, the flow meter being electrically connected to the controller, the detection signal comprising information about the water flow rate

The amount of water flowing through the flush line can be directly accumulated by using a flow meter. A preset water flow threshold may be set in the controller that can be adjusted based on the local water quality. If the water quality is better, the preset water flow threshold value can be reduced; if the water quality is poor, the preset water flow threshold value can be appropriately increased. And when the water flow passing through the flowmeter reaches a preset water flow threshold value, controlling the flushing electromagnetic valve to stop, and ending the flushing stage. Therefore, the integral control of the water purifier is facilitated, and the water consumption quality of a user is ensured.

Illustratively, a water inlet electromagnetic valve is also arranged between the first end of the flushing pipeline on the main water pipeline and the booster pump.

The water inlet electromagnetic valve can prevent the raw water port of the reverse osmosis filter element from being communicated with the concentrated water port of the reverse osmosis filter element when the water purifier stops working, so that the waste of resources due to the long flow of wastewater is prevented.

Exemplarily, a one-way valve is further arranged on the flushing pipeline, a water outlet of the flushing filter element is communicated with a raw water port of the reverse osmosis filter element through the one-way valve, and the communication direction of the one-way valve is from the water outlet of the flushing filter element to the raw water port of the reverse osmosis filter element.

Like this, can avoid at purifier system water stage, the palirrhea pipeline that washes of water in the main water pipeline leads to the user to receive the pure water volume of getting at the intake and reduces, and the influence is used and is experienced.

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. 1-3 are schematic water paths of a water purifier according to an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

101. a water inlet; 102. a water intake; 103. a water outlet; 100. a main water line; 110. a reverse osmosis filter element; 111. a raw water port of the reverse osmosis filter element; 113. a concentrate port of the reverse osmosis filter element; 120. a water inlet electromagnetic valve; 130. a booster pump; 200. flushing the pipeline; 201. a first end; 202. a second end; 210. Flushing the electromagnetic valve; 220. flushing the filter element; 221. a raw water port of the nanofiltration filter element; 222. a pure water port of the nanofiltration filter element; 230. a one-way valve; 310. a water quality detector; 320. a flow meter; 410. a front filter element; 420. a concentrated water electromagnetic valve.

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.

As shown in fig. 1, the present invention provides a water purifier, which comprises a main water pipeline 100 communicating with a water inlet 101 and a water intake 102, and a booster pump 130 and a reverse osmosis filter element 110 sequentially arranged on the main water pipeline 100 along a water flow direction. Generally, the water inlet 101 may be connected to a water source such as a municipal water pipe, and the water intake 102 may be used to be connected to a water outlet device, which may include a mechanical faucet, an electric faucet, a pipeline machine, and the like. The booster pump 130 may increase the pressure of the water entering it, thereby increasing the pressure of the water in the piping and equipment downstream thereof. After the water pressurized by the booster pump 130 passes through the reverse osmosis filter element 110, pure water for drinking is generated by filtration. The pure water filtered by the reverse osmosis filter element 110 can flow out through the water intake 102 for users to take.

The water purifier further comprises a flushing line 200. A first end 201 of the flush line 200 communicates with a section of the main water line 100 upstream of the booster pump 130, for example the water inlet 101 of the water purifier. The second end 202 of the flushing line 200 communicates with the raw water port 111 of the reverse osmosis cartridge. In other words, the flushing line 200 is connected in parallel with a portion of the main water line 100 between the water inlet 101 and the raw water port 111 of the reverse osmosis cartridge. A flushing solenoid valve 210 and a flushing filter element 220 are arranged in the flushing line 200 in the direction from the first end 201 to the second end 202, or in the direction of the water flow therein. The flush solenoid valve 210 may turn the flush line 200 on and off. The flushing filter element 220 may include one or more of a PP cotton filter element, an activated carbon filter element, a reverse osmosis filter element, and the like.

In the water production stage of the water purifier, the booster pump 130 is started, and tap water flows out from the water intake 102 through the main water pipeline 100 under the filtering action of the reverse osmosis filter element 110. When the water purifier no longer produces water, the booster pump 130 may stop operating. This process is well known to those skilled in the art and will not be described in detail.

In the flushing stage of the water purifier, the flushing solenoid valve 210 is turned on, and the tap water enters the flushing pipeline 200. After being filtered by the flushing filter element 220 on the flushing pipeline 200, pure water can be generated by flushing the filter element 220 without the action of the booster pump 130 or other booster devices, and flows into the raw water port 111 of the reverse osmosis filter element to flush the reverse osmosis filter element 110. During this rinse phase, the booster pump 130 may be shut down. After the pure water enters the raw water port 111 of the reverse osmosis filter element, the concentrated water which is left in the reverse osmosis filter element 110 before the membrane in the previous water making stage is discharged from the concentrated water port 113 of the reverse osmosis filter element and is replaced by the pure water.

It will be appreciated that in some water purification machines, the above described water production and flushing stages may not be strictly separate. In other words, at some point, the purifier may be both producing and rinsing.

Therefore, the flushing filter element 220 of the water purifier can generate pure water by the flushing filter element 220 only through the pressure of tap water without the action of the booster pump 130 or other booster devices, and the reverse osmosis filter element 110 can be flushed by the pure water. Through the reverse osmosis filter core 110 that washes, can effectively avoid dense water to see through reverse osmosis filter core 110 through the osmosis, pollute the pure water behind its membrane, lead to the TDS to rise. Therefore, the first section of water with higher TDS is prevented from being received when the user gets water next time. Moreover, the water purifier further simplifies the water path of the water purifier, reduces the burden of the booster pump 130, enables the water purifier to be in a stop state in a flushing stage, reduces the working time of the water purifier, prolongs the service life of the water purifier, reduces the noise in flushing, and even can flush the reverse osmosis filter element 110 in a state of almost silence, thereby improving the use experience of users.

Illustratively, the flushing filter 220 is a nanofiltration filter or a reverse osmosis filter having a flux of less than 100G (gallons). The raw water port 221 of the flushing filter element 220 is communicated with the flushing electromagnetic valve 210, and the pure water port 222 of the flushing filter element 220 is communicated with the raw water port 111 of the reverse osmosis filter element.

Nanofiltration is a new class between ultrafiltration and reverse osmosis which is innovated and invented by the cross-permeation of nanotechnology and traditional filtration technology. The filter core with the nanofiltration function is called as a nanofiltration filter core. The separation performance of the nanofiltration filter element depends on the nanometer microporous structure in the active separation layer, and the separation mechanism follows an adsorption-dissolution-diffusion-diafiltration model. It can intercept the organic matter and heavy metal capable of being ultrafiltered and also permeate part of the mineral matter intercepted by reverse osmosis, so that the concentration and salt permeation processes are synchronously carried out, and the specific separation and purification requirements are met. The filtration principle of nanofiltration cartridges is well known to the person skilled in the art and will not be described in detail.

The reverse osmosis filter cartridge having a small flux, such as the reverse osmosis filter cartridge of less than 100G described above, can achieve the filtering effect without the aid of the booster pump 130 and only by using the pressure of tap water, and can be used in the same manner as the nanofiltration filter cartridge.

The flushing filter core 220 is set to be a nanofiltration filter core or a reverse osmosis filter core with flux less than 100, the water purification process can be completed by using tap water pressure, a booster pump 130 or other booster devices are not needed, the water path is reduced, and the cost is reduced.

If the washing filter element 220 is one or more of a PP cotton filter element, an activated carbon filter element or a nanofiltration filter element, the washing filter element 220 may have only a raw water gap and a pure water gap. If the flushing filter element 220 is a reverse osmosis filter element, a concentrate outlet can be arranged on the basis of the reverse osmosis filter element for discharging unfiltered concentrate. The concentrated water port can be communicated with the water outlet 103 of the water purifier, and can be communicated with the concentrated water port 113 of the reverse osmosis filter element 110 together with the water outlet 103 as shown in the figure.

Further, the dense mouth of a river 113 intercommunication purifier of reverse osmosis filter core has the outlet 103, can also set up dense water solenoid valve 420 in the dense mouth of a river 113 department of reverse osmosis filter core, and in normal system water stage, it can play the effect that improves reverse osmosis filter core 110 internal pressure, and in the stage of washing, switches on completely, makes the sparge water that gets into reverse osmosis filter core 110 flow out at a high speed, takes away impurity.

Similarly, in the case that the flushing filter element 220 also uses a reverse osmosis filter element, the concentrate electromagnetic valve 420 may be disposed on the concentrate outlet of the flushing filter element 220, and controls the phase with the use method of the reverse osmosis filter element, which is well known to those skilled in the art and will not be described again.

In a large-flux water purifier, the flux of the reverse osmosis filter element 110 can be 400-. The flushing filter element 220 only works when the reverse osmosis filter element 110 is flushed and does not participate in the water receiving and taking process of a user, so that the size of the water purifier is reduced in order to reduce the cost, and the flushing filter element 220 with small flux can be used on the premise of ensuring that the reverse osmosis filter element 110 has enough flushing effect. For example, in the water purifier using the nanofiltration filter element as the flushing filter element 220 and the flux of the reverse osmosis filter element 110 is 400-1200G, the nanofiltration filter element with the flux of 40-100G can be selected, which not only satisfies the flushing function without a pressurizing device, but also does not increase the cost by selecting the flushing filter element 220 with large flux.

For example, the water purifier may further include a check valve 230 on the flushing line 200, a water outlet of the flushing filter element 220 is communicated with the raw water port 111 of the reverse osmosis filter element through the check valve 230, and a communication direction of the check valve 230 is from the water outlet of the flushing filter element 220 to the raw water port 111 of the reverse osmosis filter element. Namely, the water inlet of the check valve 230 is communicated with the water outlet of the flushing filter element 220, and the water outlet of the check valve 230 is communicated with the raw water port 111 of the reverse osmosis filter element 110. If the washing filter element 220 is a nanofiltration filter element, the water outlet of the washing filter element 220 is a pure water outlet of the nanofiltration filter element. Pure water produced by the filtration of the flushing filter element 220 may enter the main water line 100 and flush the reverse osmosis filter element 110. While water in the main water line 100 will not flow back into the flushing line 200.

Thus, it can be avoided that, in the water preparation stage of the water purifier, the water in the main water pipeline 100 flows back to the flushing pipeline 200, which reduces the amount of the pure water taken by the user at the water intake 102, and affects the use experience.

Illustratively, the water purifier also includes a controller. The controller may be electrically connected to the booster pump 130. The controller may control the booster pump 130 to start when receiving the electric signal for starting water intake from the water outlet control device, so as to boost the pressure of the pipeline where the reverse osmosis filter element 110 is located, thereby facilitating the reverse osmosis filter element to perform a filtering operation. The controller may control the booster pump 130 to stop operating when receiving the water intake stop electric signal from the water outlet control device. Therefore, the water purifier can be guaranteed to smoothly complete water production operation.

The controller may also electrically connect the outlet control and the flush solenoid valve 210. The controller controls the flushing solenoid valve 210 to be turned on after the first time threshold T1 is passed by the electric signal for stopping water intake received from the water outlet control device. Where T1 may be any real number greater than or equal to 0. For example, the controller may open the flush solenoid valve 210 to flush the reverse osmosis cartridge 110 immediately after the user closes the faucet and stops drawing water. In this example, T1 ═ 0. But often the diffusion phenomenon does not occur as quickly, so it is also possible to start the timing at the moment of stopping the water intake, T1 may be 3 minutes, 5 minutes, 10 minutes, half an hour, etc., and after the time has elapsed, the flushing solenoid valve 210 is opened and the flushing phase is entered. Preferably, the first time threshold T1 is any value between 3 minutes and 10 minutes. I.e., the reverse osmosis cartridge 110 is flushed 3 to 10 minutes after the user has taken water. The phenomenon that soluble solids in concentrated water in front of the reverse osmosis membrane diffuse into pure water behind the membrane is obviously shown after 3-5 minutes of stopping water taking. In some life scenarios, the frequency with which a user fetches water may be high, for example, while the user is cooking. If the water taking frequency of the water purifier is higher, the washing times can be reduced, so that the waste of water resources is reduced. In addition, in time wash after using, can effectually avoid the emergence of reverse osmosis filter core 110 internal diffusion phenomenon, help the user to receive the qualified pure water of TDS to reverse osmosis filter core 110's life-span has been prolonged.

The controller may control the flushing solenoid valve 210 to be turned off after a second time threshold T2 has elapsed after the flushing solenoid valve 210 is turned on, or according to a detection signal received from the detection device. The duration of the second time threshold T2 represents a flush duration for the reverse osmosis cartridge 110. The second time threshold T2 can be set according to the local water quality condition, if the water quality is poor, the T2 relative time is longer; if the water quality is good, the T2 relative time can be shortened. Meanwhile, the second time threshold T2 may also be set according to the volume of the reverse osmosis filter element 110, and the larger the volume is, the more raw water is stored in the reverse osmosis filter element 110, and the time T2 required for flushing is relatively longer, otherwise, T2 is shorter. In the water purifier provided with the detection device, whether the reverse osmosis filter element 110 is completely flushed or not can be determined according to a detection signal sent by the detection device, and then the flushing solenoid valve 210 is controlled to be closed, so that the flushing stage is finished.

Illustratively, the water outlet control device can be a high-pressure switch or an electric control faucet. If the water outlet control device is a high-pressure switch, the water inlet 102 of the water purifier can be communicated with a mechanical faucet, so that the application range of the water purifier is expanded. If the water outlet control device is an electric control faucet, the state of the water purifier can be directly operated through the electric control faucet, and the logical relation between the controller in the water purifier and each execution device is effectively simplified. The above control means are well known to those skilled in the art and will not be described in detail.

In one embodiment, as shown in fig. 2, the detection device may be a water quality detector 610 disposed at the concentrate port 113 of the reverse osmosis filter cartridge for detecting a Total Dissolved Solids (TDS) amount of water at the concentrate port 113 of the reverse osmosis filter cartridge, the water quality detector 610 being electrically connected to the controller, the detection signal including information on the total dissolved solids amount. A preset TDS threshold may be set in the controller. The predetermined TDS threshold may be equal to or slightly greater than the TDS value of the pure water discharged from the flushing filter element 220.

At the beginning of the flushing phase, the TDS value detected by the water quality detector 610 will be higher than the preset TDS threshold value, since the concentrate in the reverse osmosis filter element 110 will be discharged by the concentrate inlet 113 of the reverse osmosis filter element. When the water discharged from the concentrate inlet 113 of the reverse osmosis filter element reaches the preset TDS value, it indicates that the concentrate in the reverse osmosis filter element 110 has been discharged. At this time, the flushing solenoid valve 210 may be controlled to be turned off according to the detection signal from the water quality detector 310, and the flushing stage may be stopped.

It can be seen that the flushing solenoid valve 210 is controlled to be turned off by using the detection result of the water quality detector 310. It can be directly ensured that the concentrated water in the reverse osmosis filter element 110 is completely discharged and the reverse osmosis filter element 110 is washed clean. The problem that the water quality of the water discharged by the reverse osmosis filter element 110 reaches the preset TDS value, and the flushing solenoid valve 210 is in a conducting state and continues to flush, which causes resource waste is avoided; on the other hand, the situation that the water discharged from the reverse osmosis filter element 110 does not reach the preset TDS value yet and the flushing solenoid valve 210 is cut off to end the flushing stage is avoided. The diffusion phenomenon still appears in the reverse osmosis filter element 110, and the user receives the first section water with higher TDS value, which influences the use of the user.

In another embodiment, as shown in fig. 3, the detection device is a flow meter 320, which may be disposed on the flush line 200, for detecting the water flow rate of the flush line 200. As shown in fig. 3, the flow meter 320 is disposed between the flushing solenoid valve 210 and the flushing filter element 220, in fact, the flow meter 320 may be disposed at other positions in the water purifier as long as the water flow rate in the flushing pipeline 200 can be detected. For example, where the flushing filter 220 is a nanofiltration filter, the flow meter 320 may be disposed on a drain line of the nanofiltration filter. Since the amount of discharged water and the amount of pure water generated by the nanofiltration filter cartridge have a fixed ratio, the water flow rate of the flushing line 200 can still be determined according to the count of the flow meter 320. The flow meter 320 is electrically connected to the controller and the detection signal includes information about the water flow rate.

The amount of pure water entering the reverse osmosis filter element 110 can be determined by detecting the amount of water flowing through the flushing line 200, so as to determine whether the concentrated water in the reverse osmosis filter element 110 is completely discharged.

It follows that the flow meter 320 can directly accumulate the amount of water flowing through the flush line 200. A preset water flow threshold may be set in the controller that can be adjusted based on the local water quality. If the water quality is better, the preset water flow threshold value can be reduced; if the water quality is poor, the preset water flow threshold value can be appropriately increased. When the water flow through the flow meter 320 reaches a preset water flow threshold, the flush solenoid valve 210 is controlled to be closed, and the flush phase is ended. Therefore, the integral control of the water purifier is facilitated, and the water consumption quality of a user is ensured.

Therefore, the water purifier with the arrangement can automatically flush the reverse osmosis filter element 110 of the water purifier, and can also adjust and set a preset threshold value through the controller, for example, a preset time period, a preset TDS value, a preset water flow threshold value and the like, so as to control the flushing time of the water purifier, thereby simplifying the logical relationship among devices in the water purifier.

In one embodiment, when the water purifier is in the flushing stage, the flushing solenoid valve 210 is in the conducting state, and the controller receives the electric signal for starting to take water from the water outlet control device at this time, the controller may control the flushing solenoid valve 210 to be turned off, and control the booster pump 130 to be started. Therefore, the flushing stage of the water purifier is immediately finished, and the water purifier immediately enters the water production stage. Here, the electric signal for starting to take water is also used as an electric signal for the controller to control the flushing solenoid valve 210 to be turned off, regardless of whether the aforementioned second time threshold has not been reached currently or the detection signal has not indicated that the flushing solenoid valve 210 should be controlled to be turned off at this time. After the flushing solenoid valve 210 is cut off, tap water does not enter the flushing pipeline 200 any more, but enters the reverse osmosis filter element 110 to filter water, so that a user can timely receive and take pure water, and the waiting time of the user is reduced. Namely, the electric signal for starting to take water has the highest priority, and no matter the water purifier is in any stage, when the electric signal for starting to take water is received, the water making action is preferentially executed.

Further, a water inlet solenoid valve 120 is disposed in the main water line 100 between the first end 201 of the flushing line 200 and the booster pump 130.

The water inlet electromagnetic valve 120 can prevent the raw water port 111 of the reverse osmosis filter element from being communicated with the concentrated water port 113 of the reverse osmosis filter element when the water purifier stops working, so that the waste of resources caused by the long flow of wastewater is prevented.

It is understood that a front filter element 410, such as a composite filter element, may be further disposed at the water inlet of the water purifier to filter the tap water. Thus, the purity of the water in the downstream line can be increased, thereby extending the life of the reverse osmosis filter element 110 and the flushing filter element 220.

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 main water pipeline communicated with a water inlet and a water intake, a booster pump and a reverse osmosis filter element are sequentially arranged on the main water pipeline along the water flow direction, and the water purifier is characterized in that,

the water purifier further comprises a flushing pipeline, a first end of the flushing pipeline is communicated to a pipe section on the upper portion of the booster pump on the main water pipeline, a second end of the flushing pipeline is communicated to a raw water port of the reverse osmosis filter element, and a flushing electromagnetic valve and a flushing filter element are sequentially arranged on the flushing pipeline from the first end to the second end.

2. The water purifier as recited in claim 1, wherein said flushing filter element is a nanofiltration filter element or a reverse osmosis filter element with a flux less than 100G, a raw water port of said flushing filter element is connected to said flushing solenoid valve, and a pure water port of said flushing filter element is connected to a raw water port of said reverse osmosis filter element.

3. The water purifier of any one of claims 1 or 2, further comprising a controller electrically connected to a water outlet control device and the flush solenoid valve, the controller controlling the flush solenoid valve to conduct after a first time threshold has elapsed since receiving an electrical signal from the water outlet control device to stop water intake; and the controller controls the flushing electromagnetic valve to be cut off after the flushing electromagnetic valve conducts for a second time threshold or according to a detection signal received by the self-detection device.

4. The water purifier as recited in claim 3, wherein said controller controls said flush solenoid valve to be turned off and said booster pump to be turned on when said controller receives an electric signal for starting water intake from said water outlet control device and said flush solenoid valve is in an on state.

5. The water purifier of claim 3, wherein the outlet control device is a high pressure switch or an electrically controlled faucet.

6. The water purifier of claim 3,

the detection device is a water quality detector, is arranged at the concentrated water port of the reverse osmosis filter element and is used for detecting the total amount of soluble solids of water at the concentrated water port of the reverse osmosis filter element, the water quality detector is electrically connected with the controller, and the detection signal comprises information about the total amount of the soluble solids.

7. The water purifier of claim 3,

the detection device is a flow meter and is used for detecting the water flow of the flushing pipeline, the flow meter is electrically connected with the controller, and the detection signal comprises information about the water flow.

8. The water purifier as recited in claim 1 or 2, wherein a water inlet solenoid valve is further disposed between the first end of the flushing line and the booster pump on the main water line.

9. The water purifier as claimed in claim 1 or 2, wherein a check valve is further disposed on the flushing pipeline, the water outlet of the flushing filter element is communicated with the raw water inlet of the reverse osmosis filter element through the check valve, and the communication direction of the check valve is from the water outlet of the flushing filter element to the raw water inlet of the reverse osmosis filter element.

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