CN220098808U - Water purifying device - Google Patents

Abstract

The utility model relates to the technical field of household appliances and discloses a water purifying device which comprises a raw water pipeline, a water inlet pipeline, a first waste water pipeline, a second waste water pipeline, a preposed filter element, an RO membrane filter element and a TDS detection unit. The preposed filter core is arranged to filter the water in the raw water pipeline in advance and then introduce the filtered water into the water inlet pipeline, so that tiny particles in the water inlet pipeline are greatly reduced, the water quality entering the RO membrane filter core is improved, and therefore, the water purifying device can realize high recovery rate water production and reduce wastewater discharge. Meanwhile, the filter burden of the RO membrane filter core is reduced due to the arrangement of the front filter core, the plugging speed of the RO membrane can be slowed down, and the service life of the water purifying device is prolonged. Through setting up TDS detecting element for purifier can select to make water with first mode or second mode according to the quality of water scope of detection, realizes the water production of different rate of recovery, and purifier can realize high rate of recovery water production under first mode, has effectively reduced the waste water discharge volume, has realized the water conservation.

Description

Water purifying device

Technical Field

The utility model relates to the technical field of household appliances, in particular to a water purifying device.

Background

The water purifier is water treatment equipment for carrying out deep filtration and purification treatment on water quality according to the use requirement of the water. The water purifier generally comprises a reverse osmosis membrane, and the reverse osmosis membrane can fail due to blockage of filter materials in the use process, so that the water yield of the water purifier is reduced.

In the prior art, in order to prevent or reduce the clogging of the RO membrane by impurities as much as possible, the recovery rate of the water produced by the reverse osmosis water purifier is generally set below 65 percent so as to obtain larger cross flow, and the waste water flowing through the surface of the RO membrane in a cross flow way is adopted to wash the RO membrane, so that the purposes of reducing the clogging of the surface of the membrane and prolonging the service life of the RO membrane are achieved. However, the increase in the amount of waste water means more waste water and cannot meet the water saving requirement.

Therefore, a water purifying apparatus is needed to solve the above problems.

Disclosure of Invention

Based on the problems, the utility model aims to provide a water purifying device which can improve the recovery rate of water production, reduce the discharge of wastewater and save water.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

provided is a water purifying apparatus including:

the device comprises a preposed filter element and a TDS detection unit, wherein the TDS detection unit is used for detecting the TDS value of water filtered by the preposed filter element;

the downstream of leading filter core is provided with two piece at least waste water pipeline, every waste water pipeline all is provided with the valve, when the TDS value is in first default scope, purifier is with first mode system water, arbitrary one waste water pipeline's valve is opened, when the TDS value is in second default scope, purifier is with second mode system water, two at least waste water pipeline's valve all is opened, the TDS value of first default scope is less than the TDS value of second default scope.

As a preferable mode of the water purifying device of the present utility model, at least two of the waste water pipelines include a first waste water pipeline, a second waste water pipeline and a third waste water pipeline, and at least one of the waste water pipelines is connected to the water inlet end of the pre-filter element.

As a preferable scheme of the water purifying device, when the water purifying device is used for preparing water in a first mode, the valve of the first waste water pipeline is opened, when the water purifying device is used for preparing water in a second mode, the valve of the first waste water pipeline and the valve of the second waste water pipeline are both opened, and the third waste water pipeline is connected with the water inlet end of the front filter element.

As a preferable mode of the water purifying device, the valve of the first waste water pipeline comprises a first waste water valve, the first waste water valve is used for controlling the on-off of the first waste water pipeline, the valve of the second waste water pipeline comprises a second waste water valve and a flushing valve, the flushing valve is positioned at the downstream of the second waste water valve, and the second waste water valve and the flushing valve are both used for controlling the on-off of the second waste water pipeline.

As the preferable scheme of the water purifying device, the water purifying device further comprises a second water tap, wherein the second water tap is connected with the water outlet end of the front filter element and is used for outputting purified water filtered by the front filter element, and the second water tap can extract water in the third water pipeline.

As the preferable scheme of the water purifying device, the water purifying device further comprises a water inlet pipeline, one end of the water inlet pipeline is connected with the water outlet end of the front filter element, the other end of the water inlet pipeline is connected with at least two waste water pipelines, and the TDS detection unit is arranged on the water inlet pipeline.

As a preferred embodiment of the water purifying apparatus of the present utility model, the water purifying apparatus further includes a filter element assembly including:

the water inlet end of the RO membrane filter element is connected with the water inlet pipeline, and the wastewater output end of the RO membrane filter element is connected with at least two wastewater pipelines;

the composite filter element is arranged on the water inlet pipeline, the TDS detection unit is located at the upstream of the composite filter element, a second water inlet valve is arranged on the water inlet pipeline at the downstream of the composite filter element, and the second water inlet valve is used for controlling the on-off of the water inlet pipeline.

As the preferable scheme of the water purifying device, the water purifying device further comprises a valve body, wherein the valve body is provided with a water inlet channel and at least two mutually independent water outlet channels, the water inlet channel is connected with the wastewater output end of the RO membrane filter core, and the at least two water outlet channels are correspondingly connected with at least two wastewater pipelines one by one.

As a preferable scheme of the water purifying device, the water purifying device further comprises a pure water output pipeline and a first tap, wherein the pure water output pipeline is connected with the pure water output end of the RO membrane filter element, the first tap is connected with the pure water output pipeline and is used for outputting pure water, and a high-voltage switch is arranged on the upstream of the first tap in the pure water output pipeline.

As a preferable mode of the water purifying device of the present utility model, the first preset range is: the TDS value is less than or equal to 500ppm, and the second preset range is as follows: the TDS value is less than 500ppm and less than or equal to 1000ppm, the water recovery rate of the water purifying device is 75-78% in the first mode, and the water recovery rate of the water purifying device is 55-65% in the second mode.

The beneficial effects of the utility model are as follows:

according to the water purifying device provided by the utility model, the TDS detection unit is arranged to detect the TDS value of the water filtered by the front filter element, so that the water purifying device can selectively prepare water in the first mode or the second mode according to the detected water quality range, different recovery rate water preparation is realized, the water purifying device can realize high recovery rate water preparation in the first mode, only any waste water pipeline is conducted, the waste water discharge amount is effectively reduced, and water saving is realized. In addition, through setting up leading filter core can be with the water in the raw water pipeline in advance filtration before leading into in the water inlet pipeline for tiny particle such as bacterium, protein, colloid in the water inlet pipeline water significantly reduces, has effectively improved the quality of water that gets into RO membrane filter core department, consequently can make purifier realize high recovery system water, thereby reduce waste water emission, water economy resource. Meanwhile, the filter burden of the RO membrane filter core is reduced due to the arrangement of the front filter core, the plugging speed of the RO membrane can be slowed down, and the service life of the water purifying device is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural view of a water purifying apparatus according to an embodiment of the present utility model.

In the figure:

1-a raw water pipeline; 2-a water inlet pipeline; 3-a first waste water line; 4-a second waste water line; 5-a pre-filter element;

6-RO membrane filter core; a 7-TDS detection unit; 8-a third water pipeline; 9-a driving member; 10-a valve body; 20-a composite filter element; 30-pure water output pipeline; 40-arranging a filter element; 50-a first tap; 60-second water tap

A head; 70-a flow meter;

21-a second inlet valve;

31-a first waste valve;

41-a second waste valve; 42-flushing valve;

81-a first inlet valve; 82-a one-way valve;

301-high voltage switch.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, the present embodiment provides a water purifying apparatus including a pre-filter 5 and a TDS detection unit 7, the TDS detection unit 7 being configured to detect a TDS value of water filtered by the pre-filter 5.

Further, at least two waste water pipelines are arranged at the downstream of the pre-filter element 5, when the TDS value is in a first preset range, the water purifying device prepares water in a first mode, when any one waste water pipeline is conducted, and when the TDS value is in a second preset range, the water purifying device prepares water in a second mode, at least two waste water pipelines are conducted, and the TDS value of the first preset range is smaller than the TDS value of the second preset range.

According to the water purifying device provided by the embodiment, the TDS value of the water filtered by the pre-filter element 5 is detected by the TDS detection unit 7, so that the water purifying device can selectively prepare water in the first mode or the second mode according to the detected water quality range, different recovery rate water preparation is realized, the water purifying device can realize high recovery rate water preparation in the first mode, only any one waste water pipeline 3 is conducted, the waste water discharge amount is effectively reduced, and water saving is realized.

Further, referring to fig. 1, the water purifying device further includes a raw water pipeline 1 and a water inlet pipeline 2, one end of the raw water pipeline 1 is connected with the water supply pipeline, the other end is connected with the water inlet end of the pre-filter element 5, one end of the water inlet pipeline 2 is connected with the water outlet end of the pre-filter element 5, the other end is connected with at least two waste water pipelines, and the TDS detection unit 7 is arranged on the water inlet pipeline 2. The water purification device further comprises a filter element assembly, the filter element assembly comprises an RO membrane filter element 6, the water inlet end of the RO membrane filter element 6 is connected with the water inlet pipeline 2, and the wastewater output end of the RO membrane filter element 6 is connected with at least two wastewater pipelines.

The water in the raw water pipeline 1 can be filtered in advance and then introduced into the water inlet pipeline 2 by arranging the pre-filter element 5, so that micro particles such as bacteria, proteins and colloids in the water inlet pipeline 2 are greatly reduced, the water quality entering the RO membrane filter element 6 is effectively improved, and therefore, the water purifying device can realize high recovery rate water production, and the wastewater discharge is reduced, and the water resource is saved. Meanwhile, the filter burden of the RO membrane filter core 6 is reduced due to the arrangement of the pre-filter core 5, the plugging speed of the RO membrane can be slowed down, and the service life of the water purifying device is prolonged.

Preferably, the pre-filter 5 is a UF ultrafiltration filter, which uses pressure difference as power, has a separation molecular weight range of hundreds to millions, has a pore size of 0.001-0.2 μm, and can separate micro fine particles such as bacteria, proteins, colloid, and the like. The water quality SDI of the water pretreated by the UF ultrafiltration filter element can reach 0-1, and the filtering rate of organic matters can reach more than 99%, so that the water quality of the inlet water of the RO membrane filter element 6 reaches SDI < 1, and the pollution of the organic matters to the surface of the RO membrane is greatly reduced.

Further, the TDS detection unit 7 may be a TDS sensor or the like as long as it is capable of measuring the TDS value of the water in the water intake pipe 2 in real time.

Optionally, the first preset range is: the TDS value is less than or equal to 500ppm, and the second preset range is as follows: the TDS value is less than 500ppm and less than or equal to 1000ppm. In the first mode, the water making recovery rate of the water purifying device is 75% -78%, and in the second mode, the water making recovery rate of the water purifying device is 55% -65%. In the first mode, the TDS value of water in the water inlet pipeline 2 is smaller, and the water quality is good, so that the water purifying device can prepare water with high recovery rate, the water preparing recovery rate reaches 75% -78%, which is equivalent to the ratio of purified water to waste water being greater than 3/4, and the water yield of the water purifying device is 65% higher than that of national standard first-grade water preparing, so that the high water saving effect is achieved.

In the second mode, the TDS value of the water in the water inlet pipeline 2 is relatively large, so that the water purifying device adopts the recovery rate of 55% -65% to produce water, the filter element cannot be damaged, the water yield of the water purifying device still meets the national standard secondary water production standard (the water yield is 55%), and the water saving effect is synchronous with the national standard secondary water production.

Optionally, referring to fig. 1, the water purifying device further includes a valve body 10, where the valve body 10 has a water inlet channel and at least two mutually independent water outlet channels, the water inlet channel is connected to the wastewater output end of the RO membrane filter core 6, and the at least two water outlet channels are connected to at least two wastewater pipelines in a one-to-one correspondence. In particular, the at least two waste water lines comprise a first waste water line 3, a second waste water line 4 and a third waste water line 8, at least one waste water line being connected to the water inlet end of the pre-filter cartridge 5. So set up, can make the sparge water pass through the inlet end of leading filter core 5 via the waste water pipeline when washing RO membrane filter core 6, realize the reuse of sparge water, water economy.

Further, in this embodiment, when the water purifying device is used for producing water in the first mode, the valve of the first waste water pipeline 3 is opened, and when the water purifying device is used for producing water in the second mode, the valve of the first waste water pipeline 3 and the valve of the second waste water pipeline 4 are both connected, and the third waste water pipeline 8 is connected with the water inlet end of the water inlet pipeline 2.

Specifically, referring to fig. 1, the water purifying device further includes a driving element 9, one end of the third water pipeline 8 is connected with the wastewater output end of the RO membrane filter core 6, the other end is connected with the raw water pipeline 1, the driving element 9 is disposed on the water inlet pipeline 2 and is located at the upstream of the RO membrane filter core 6, the driving element 9 can introduce water in the water inlet pipeline 2 into the RO membrane filter core 6, and water flowing through the RO membrane filter core 6 can be introduced into the raw water pipeline 1 through the third water pipeline 8. The driving piece 9 is arranged to enable water in the RO membrane filter core 6 to flow more smoothly, and the third water pipeline 8 and the driving piece 9 are matched to realize flushing of the RO membrane filter core 6. After the driving piece 9 is started, water in the water inlet pipeline 2 flows through the RO membrane filter core 6, concentrated water on the surface of the RO membrane is flushed out and is introduced into the third water pipeline 8, and then the concentrated water is introduced into the raw water pipeline 1 through the third water pipeline 8, so that the reuse of flushing water is realized. Preferably, the driving member 9 is a booster pump.

Optionally, referring to fig. 1, the valve of the first waste water pipeline 3 includes a first waste water valve 31, the first waste water valve 31 is used for controlling on-off of the first waste water pipeline 3, the valve of the second waste water pipeline 4 includes a second waste water valve 41 and a flushing valve 42, the flushing valve 42 is located downstream of the second waste water valve 41, and the second waste water valve 41 and the flushing valve 42 are both used for controlling on-off of the second waste water pipeline 4. When the water purification apparatus produces water in the first mode, the second waste water valve 41 is de-energized, the flush valve 42 is closed, and the second waste water line 4 is disconnected. The first waste water valve 31 is powered on, the first waste water pipeline 3 is communicated, and waste water generated by the RO membrane filter core 6 is discharged through the first waste water pipeline 3. When the water purifying device produces water in the second mode, the flushing valve 42 is opened, both the first waste water valve 31 and the second waste water valve 41 are powered, both the first waste water pipeline 3 and the second waste water pipeline 4 are conducted, and waste water is discharged through both the first waste water pipeline 3 and the second waste water pipeline 4. Preferably, the flushing valve 42 is a solenoid valve, which is convenient to control and can realize automatic control of the water purifying device.

When the water purifying apparatus is not in use, both the first waste water valve 31 and the second waste water valve 41 are in a power-off state. When the water purifying device is used for flushing, the first waste water valve 31 and the second waste water valve 41 are in a power-off state, so that flushing water can be recycled through the third waste water pipeline 8.

In this embodiment, the valve body 10 is preferably a four-way valve, a first opening (water inlet channel) of the four-way valve is connected with the wastewater output end of the RO membrane cartridge 6, a second opening and a third opening (water outlet channel) of the four-way valve are respectively connected with the first wastewater pipeline 3 and the second wastewater pipeline 4, and a fourth opening of the four-way valve is connected with the third wastewater pipeline 8. Through setting up the cross valve for purifier can select the waste water of first waste water pipeline 3 row or first waste water pipeline 3 and second waste water pipeline 4 row waste water simultaneously, can also realize the sparge water and retrieve the recycle through third waste water pipeline 8 simultaneously, water economy.

Optionally, referring to fig. 1, the third water pipeline 8 is provided with a first water inlet valve 81 and a one-way valve 82, the one-way valve 82 is located downstream of the first water inlet valve 81, and the first water inlet valve 81 is used for controlling on-off of the third water pipeline 8. When the water purifying device obtains a flushing signal, the first water inlet valve 81 is opened so that flushing water is recycled through the third waste water pipeline 8, and when not flushed, the first water inlet valve 81 is in a closed state. By providing the check valve 82 downstream of the first water inlet valve 81, it is possible to prevent water in the raw water pipe 1 from being introduced into the third water pipe 8 when not being flushed, thereby avoiding water waste.

Optionally, referring to fig. 1, the water purifying device further includes a pure water output pipe 30 and a post filter element 40, the pure water output pipe 30 is connected to the pure water output end of the RO membrane filter element 6, and the post filter element 40 is disposed on the pure water output pipe 30. Pure water obtained through filtration of the RO membrane filter core 6 is output through the pure water output pipeline 30, and then can be used by a user, pure water in the pure water output pipeline 30 can be further filtered through the rear filter core 40, the rear filter core 40 can be an activated carbon filter core, peculiar smell in water can be removed, and the taste of drinking water is improved.

Further, the water purifying device further comprises a first tap 50, the first tap 50 is connected with the pure water output pipeline 30 for outputting pure water, and the pure water output pipeline 30 is provided with a high-pressure switch 301 at the downstream of the post-filter element 40. In this embodiment, the high-voltage switch 301 is a unidirectional high-voltage switch, when the user turns on the first faucet 50 to obtain water, the high-voltage switch 301 is depressurized to send a water making signal, the water purifying device starts water making, and the obtained pure water is output through the first faucet 50 for the user to use.

With continued reference to fig. 1, optionally, the water purifying device further includes a second tap 60, the second tap 60 is connected to the water outlet end of the pre-filter 5, and is used for outputting the purified water filtered by the pre-filter 5, and the second tap 60 can extract the water in the third water pipeline 8, and a flowmeter 70 is disposed upstream of the second tap 60. When the user opens the second tap 60, raw water in the raw water pipeline 1 enters the pre-filter 5, and water filtered by the pre-filter 5 flows through the flowmeter 70 and is output for the user through the second tap 60. In addition, in the process of flushing the RO membrane filter element 6, flushing water can be introduced into the raw water pipeline 1 through the third water pipeline 8 and then flows through the pre-filter element 5, so that the second faucet 60 can output recovered flushing water filtered by the pre-filter element 5, namely, the flushing water can be directly filtered and then used by a user, and water saving is realized. Further, as the water flow passes through the flow meter 70, the flow meter 70 obtains a water flow signal indicating that the second faucet 60 is in an open state.

In this embodiment, to realize the cyclic washing of the RO membrane and save water, when the first faucet 50 accumulates T time per operation and the flowmeter 70 obtains the water flow signal, the control system of the water purifying device controls the driving member 9 to start, so as to wash the RO membrane by using the water in the water inlet pipeline 2, and realize the periodic cyclic washing of the RO membrane. The specific value of T can be adaptively set according to the specification of the RO membrane, for example, the value of T is 30 minutes, that is, when the first tap 50 is operated for 30 minutes in an accumulated manner and the flow meter 70 obtains a water flow signal after the second tap 60 is opened, a signal for starting the driving member 9 is sent to flush the RO membrane, otherwise, the RO membrane is not flushed. The operating time of the first tap 50 may be reflected by the time period during which the high voltage switch 301 is activated, or by the operating time period of the driving member 9.

Further, if the control system of the water purifying device detects that the first faucet 50 is opened in the RO membrane flushing process, the control system preferentially uses the second faucet 60 to output purified water, and the RO membrane filter core 6 does not produce water, so that the discharge amount of wastewater in the water preparing process of the water purifying device can be effectively reduced, the repeated utilization of flushing water is realized, and the purpose of saving water is achieved.

Optionally, referring to fig. 1, the filter element assembly further comprises a composite filter element 20, the composite filter element 20 being disposed on the water inlet line 2 and upstream of the drive member 9, and the TDS detection unit 7 being located upstream of the composite filter element 20. The composite filter element 20 can further filter the water filtered by the pre-filter element 5, and filter the residual impurities in the water, so that the filtering burden of the RO membrane filter element 6 is further reduced, and the RO membrane filter element 6 is protected. The TDS detection unit 7 is arranged at the upstream of the composite filter element 20, so that the water quality of the water in the water inlet pipeline 2 can be detected more accurately, the water purifying device can be controlled to switch the first mode and the second mode to produce water accurately, and the water yield is improved. In this embodiment, the composite filter element 20 includes a PP filter element and a CTO filter element, that is, a combination of a PP cotton filter element and a CTO carbon rod filter element, where the PP filter element can effectively remove substances such as sediment, rust, bacteria, chemical pollution, etc. in water, and also can retain nutrients in water. The CTO filter core can remove residual chlorine, organic compounds and the like in water and remove peculiar smell in the water.

Further, a second water inlet valve 21 is arranged on the water inlet pipeline 2 between the composite filter element 20 and the driving piece 9, and the second water inlet valve 21 is used for controlling the on-off of the water inlet pipeline 2. When pure water is produced and the RO membrane needs to be washed, the driving member 9 is started, the second water inlet valve 21 is opened, and when pure water does not need to be produced or the RO membrane needs to be washed, the driving member 9 is closed, and the second water inlet valve 21 is in a closed state.

The water purifying device provided in this embodiment has the following working processes:

when pure water is prepared, after the water purification device is electrified, when the first faucet 50 is turned on, the high-pressure switch 301 is in decompression to send out a water preparation signal, the second water inlet valve 21 and the driving piece 9 are simultaneously turned on, raw water in the raw water pipeline 1 enters the water inlet pipeline 2 after being filtered by the front filter element 5, water in the water inlet pipeline 2 is filtered by the composite filter element 20 and then is introduced into the RO membrane filter element 6 through the driving piece 9, pure water is obtained after being filtered by the RO membrane filter element 6 and is introduced into the pure water output pipeline 30, and the pure water in the pure water output pipeline 30 is discharged by the first faucet 50 after being processed by the rear filter element 40. At the same time, the generated wastewater is discharged from the first wastewater pipeline 3 or simultaneously discharged from the first wastewater pipeline 3 and the second wastewater pipeline 4 (corresponding water making mode is automatically selected according to the range of the water quality in the current water inlet pipeline 2 detected by the TDS detection unit 7).

The preparation of purified water involves two states:

1) When the second tap 60 is opened and the water discharge time of the first tap 50 is accumulated to reach the time T (for example, 30 minutes), the first water inlet valve 81 and the second water inlet valve 21 are both opened, raw water in the raw water pipeline 1 is filtered by the pre-filter element 5 and then is introduced into the second tap 60 and the water inlet pipeline 2, water flows through the flowmeter 70, the flowmeter 70 obtains a water flow signal, the control system of the water purifying device controls the driving piece 9 to start, water in the water inlet pipeline 2 flows through the RO membrane filter element 6, concentrated water on the surface of the RO membrane is flushed out and introduced into the third water pipeline 8, and then the raw water is introduced into the raw water pipeline 1 through the third water pipeline 8, so as to circularly flush the RO membrane. Meanwhile, the flushing water in the third water pipeline 8 returns to the raw water pipeline 1 again, is filtered by the pre-filter element 5 and flows out of the second faucet 60 to be reused as domestic water, so that the water is saved. If the first tap 50 is detected to be opened in the process, the water purifying device still preferentially prepares purified water, and does not prepare purified water.

2) When the second tap 60 is opened, but the water discharge time of the first tap 50 does not reach the time T, the raw water in the raw water pipeline 1 is directly filtered by the pre-filter element 5 and then discharged by the second tap 60 for the user, at this time, both the first water inlet valve 81 and the second water inlet valve 21 are closed, and the driving member 9 is not started. If the first tap 50 is opened for a time accumulated to exceed T, the water purifying apparatus operates as in the above state 1).

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. The water purifying device is characterized by comprising a pre-filter element (5) and a TDS detection unit (7), wherein the TDS detection unit (7) is used for detecting the TDS value of water filtered by the pre-filter element (5);

the downstream of leading filter core (5) is provided with two piece at least waste water pipelines, every waste water pipeline all is provided with the valve, when the TDS value is in first default scope, purifier is with first mode system water, arbitrary one waste water pipeline's valve is opened, when the TDS value is in second default scope, purifier is with second mode system water, two at least waste water pipeline's valve all is opened, the TDS value of first default scope is less than the TDS value of second default scope.

2. Water purification device according to claim 1, characterized in that at least two of said waste water lines comprise a first waste water line (3), a second waste water line (4) and a third waste water line (8), at least one of said waste water lines being connected to the water inlet end of the pre-filter cartridge (5).

3. The water purification device according to claim 2, wherein the valve of the first waste water pipeline (3) is opened when the water purification device is used for preparing water in a first mode, the valve of the first waste water pipeline (3) and the valve of the second waste water pipeline (4) are both opened when the water purification device is used for preparing water in a second mode, and the third waste water pipeline (8) is connected with the water inlet end of the pre-filter element (5).

4. A water purification device according to claim 3, characterized in that the valve of the first waste water line (3) comprises a first waste water valve (31), the first waste water valve (31) being used for controlling the on-off of the first waste water line (3), the valve of the second waste water line (4) comprises a second waste water valve (41) and a flushing valve (42), the flushing valve (42) being located downstream of the second waste water valve (41), the second waste water valve (41) and the flushing valve (42) being both used for controlling the on-off of the second waste water line (4).

5. The water purification device according to claim 2, further comprising a second tap (60), said second tap (60) being connected to the water outlet end of said pre-filter (5) for outputting purified water filtered by said pre-filter (5), and said second tap (60) being capable of extracting water from said third water line (8).

6. The water purification device according to claim 1, further comprising a water inlet pipeline (2), wherein one end of the water inlet pipeline (2) is connected to the water outlet end of the pre-filter element (5), the other end is connected to at least two waste water pipelines, and the TDS detection unit (7) is disposed on the water inlet pipeline (2).

7. The water purification apparatus of claim 6, further comprising a cartridge assembly, the cartridge assembly comprising:

the RO membrane filter core (6), the water inlet end of the RO membrane filter core (6) is connected with the water inlet pipeline (2), and the wastewater output end of the RO membrane filter core (6) is connected with at least two wastewater pipelines;

the composite filter element (20) is arranged on the water inlet pipeline (2), the TDS detection unit (7) is located at the upstream of the composite filter element (20), a second water inlet valve (21) is arranged on the water inlet pipeline (2) and at the downstream of the composite filter element (20), and the second water inlet valve (21) is used for controlling the on-off of the water inlet pipeline (2).

8. The water purification device according to claim 7, further comprising a valve body (10), wherein the valve body (10) has a water inlet channel and at least two mutually independent water outlet channels, the water inlet channel is connected to the wastewater output end of the RO membrane cartridge (6), and the at least two water outlet channels are connected to the at least two wastewater pipes in a one-to-one correspondence.

9. The water purification apparatus according to claim 8, further comprising a pure water output line (30) and a first tap (50), said pure water output line (30) being connected to a pure water output end of said RO membrane cartridge (6), said first tap (50) being connected to said pure water output line (30) for outputting pure water, said pure water output line (30) being provided with a high-pressure switch (301) upstream of said first tap (50).

10. The water purification apparatus according to any one of claims 1 to 9, wherein the first preset range is: the TDS value is less than or equal to 500ppm, and the second preset range is as follows: the TDS value is more than 500ppm and less than or equal to 1000ppm,

in the first mode, the water recovery rate of the water purifying device is 75-78 percent, in the second mode,

the recovery rate of the water produced by the water purifying device is 55-65%.