CN217103176U

CN217103176U - Water purifier

Info

Publication number: CN217103176U
Application number: CN202220752968.XU
Authority: CN
Inventors: 赵瑞华; 张建勇; 李颖
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-08-02
Anticipated expiration: 2032-04-02

Abstract

The present disclosure relates to a water purifier. The present disclosure provides a water purifier, including: a water inlet part; a purified water outlet; the filter elements at least comprise a first filter element and a second filter element which are respectively communicated with the water inlet part; the first valve at least comprises a first water outlet end and a second water outlet end, the first water outlet end is communicated with the first filter element, and the second water outlet end is communicated with the second filter element; wherein, the water purifier is in under the state of first gear, and first water route switches on, and the first wastewater discharge passageway of first filter core closes, and first water route switches on for: after entering the first valve from the water inlet part, the water flow flows out of the first water outlet end to the first filter element, and the purified water filtered by the first filter element flows out of the purified water outlet; and the wastewater discharged from the first filter element enters the second filter element, and the purified water filtered by the second filter element flows out through the water purifying port. The arrangement of the present disclosure, which can provide at least one more water filtration passage than the number of filter elements, can provide more options for the user.

Description

Water purifier

Technical Field

The disclosure relates to the field of water purifier manufacturing, in particular to a water purifier.

Background

Along with the improvement of the living standard of people, the quality of drinking water is more and more emphasized, the sales volume of household water purifying equipment is increased year by year, and the functional requirements on the water purifier are more and more increased.

The water purifier can meet different requirements of users on water yield in different scenes, and becomes a problem to be solved urgently in need of the current water purifier.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides a water purifier.

According to an aspect of an embodiment of the present disclosure, there is provided a water purifier including: a water inlet part (20); a purified water outlet (50); a plurality of filter elements at least comprising a first filter element (41) and a second filter element (42) which are respectively communicated with the water inlet part (20); and a first valve (30) comprising at least a first outlet end communicating with said first filter element (41) and a second outlet end communicating with said second filter element (42); wherein, under the state that water purifier (10) is in first gear, first water route switches on, and first waste water discharge route (415) of first filter core (41) close, first water route switches on and is: after entering the first valve (30) from the water inlet part (20), the water flows out from the first water outlet end to the first filter element (41), and the purified water filtered by the first filter element (41) flows out through the purified water outlet (50); and the waste water discharged from the first filter element (41) enters the second filter element (42), and the purified water filtered by the second filter element (42) flows out through the purified water outlet (50).

In one embodiment, the first filter element (41) comprises a clean water outlet and a waste water outlet; a first waste water pipe (412) is arranged between the waste water outlet of the first filter element (41) and the water inlet end of the second filter element (42); a one-way valve (414) is disposed on the first waste (412), the one-way valve (414) configured to allow flow from the waste outlet of the first filter element (41) to the inlet end of the second filter element (42) and to inhibit reverse flow.

In an embodiment, the first waste discharge passage (415) is in communication with the first waste (412); a second valve (413) is provided on the first waste water discharge passage (415), and the second valve (413) is configured to close the first waste water discharge passage (415) in a state where the water purifier (10) is in the first gear.

In one embodiment, the water purifier further comprises a purified water outlet; under water purifier (10) is in the state of second gear, the second water route switches on, first waste water discharge passageway (415) switch on, wherein, the second water route switches on and is: after entering the first valve (30) from the water inlet part (20), the water flows out from the first water outlet end to the first filter element (41), and the purified water filtered by the first filter element (41) flows out through the purified water outlet (50); and the wastewater discharged from the first filter element (41) is discharged through the first wastewater discharge passage (415).

In one embodiment, when the water purifier (10) is in the third gear, the third water path is conducted, wherein the third water path is conducted as follows: after entering the first valve (30) from the water inlet part (20), the water flows out from the second water outlet end to the second filter element (42), and the purified water filtered by the second filter element (42) flows out through the purified water outlet (50); and the wastewater discharged from the second filter element (42) is discharged through a second wastewater discharge path (422). .

In one embodiment, when the water purifier (10) is in the fourth position, a fourth water path is conducted, and the first wastewater discharge path (415) is closed, wherein the fourth water path is conducted as follows: after entering the first valve (30) from the water inlet part (20), the water flows out from the first water outlet end and the second water outlet end to the first filter element (41) and the second filter element (42), the purified water filtered by the first filter element (41) flows out through the purified water outlet (50), and the purified water filtered by the second filter element (42) flows out through the purified water outlet (50); and the wastewater discharged from the first filter element (41) is discharged through the first wastewater discharge passage (415), and the wastewater discharged from the second filter element (42) is discharged through the second wastewater discharge passage (422).

In one embodiment, the first valve (30) is a solenoid valve; and/or said second valve (413) is a solenoid valve.

In one embodiment, the water inlet (20) comprises a variable frequency water pump.

In one embodiment, the pump rate of the variable frequency water pump is different according to different gears of the water purifier (10).

In one embodiment, the effective filter membrane area of the first filter element (41) is the same as the effective filter membrane area of the second filter element (42); or the effective filter membrane area of the first filter element (41) is different from the effective filter membrane area of the second filter element (42).

In one embodiment, the first filter element (41) comprises a reverse osmosis membrane; and/or the second filter element (42) comprises a reverse osmosis membrane.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: this disclosed setting, first valve can communicate respectively with a plurality of filter cores, and the water of portion of intaking can get into different filter cores respectively like this. Simultaneously, first filter core still communicates with the second filter core, and under this condition, the water of portion of intaking can get into the second filter core through first filter core, then filters out from the second filter core. It can be seen that the arrangement of the present disclosure, which can provide at least one more water filtration pathway than the number of filter cartridges, can provide a greater number of options for the user.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic view illustrating a structure of a water purifier according to an exemplary embodiment.

Fig. 2 is a schematic view illustrating a structure of a water purifier according to another exemplary embodiment.

Reference numerals: 10: a water purifier; 20: a water inlet part; 30: a first valve; 50: a purified water outlet; 41: a first filter element; 42: a second filter element; 411: a first strainer; 412: a first waste pipe; 413: a second valve; 414: a one-way valve; 415: a first wastewater discharge path; 421: a second strainer; 422: a second waste water discharge path.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosure, as detailed in the claims.

The present disclosure provides a water purifier, including: a water inlet part; a purified water outlet; the filter elements at least comprise a first filter element and a second filter element which are respectively communicated with the water inlet part; the first valve at least comprises a first water outlet end and a second water outlet end, the first water outlet end is communicated with the first filter element, and the second water outlet end is communicated with the second filter element; wherein, the water purifier is in under the state of first gear, and first water route switches on, and the first wastewater discharge passageway of first filter core closes, and first water route switches on for: after entering the first valve from the water inlet part, the water flow flows out of the first water outlet end to the first filter element, and the purified water filtered by the first filter element flows out of the purified water outlet; and the wastewater discharged from the first filter element enters the second filter element, and the purified water filtered by the second filter element flows out through the water purifying port.

This disclosed setting, first valve can communicate respectively with a plurality of filter cores, and the water of portion of intaking can get into different filter cores respectively like this. Simultaneously, first filter core still communicates with the second filter core, and under this condition, the water of portion of intaking can get into the second filter core through first filter core, then filters out from the second filter core. It can be seen that the arrangement of the present disclosure, which can provide at least one more water filtration pathway than the number of filter cartridges, can provide a greater number of options for the user.

As shown in fig. 1, the water purifier 10 of the present disclosure may include a water inlet part 20, a first valve 30, and a plurality of filter elements. The water inlet part 20 is connected with the first valve 30, and the first valve 30 comprises a plurality of water outlet ends which are respectively communicated with the filter elements. Water from the inlet may enter the plurality of cartridges through the first valve 30, respectively.

In the present disclosure, the plurality of cartridges may include at least a first cartridge 41 and a second cartridge 42. Although fig. 1 illustrates the case where the water purifier 10 includes two filter elements, the present disclosure is not limited thereto, and in some embodiments, the water purifier 10 may include three filter elements or more.

In the exemplary embodiments of the present disclosure, in the present disclosure, the water purifier may include a plurality of gears, and the control module in the water purifier may control how relevant components in the water purifier operate according to the gears. For example, according to the water purifier being in different gears, the control module can control the water outlet end of the first valve to communicate with different filter elements respectively, so that the inlet water can enter different filter elements through the first valve 30 respectively.

In the exemplary embodiment of the present disclosure, the first valve 30 may be, for example, a solenoid valve, and may control which gear through which the intake water passes according to a difference of an electric signal. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured.

In an exemplary embodiment of the present disclosure, for example, when the water purifier is in a state of the first gear, the first water path is turned on. The first waterway is open, that is, the water purifier 10 feeds water from the water inlet portion 20, the control module can control the first valve 30 to make the water feed flow out from the first water outlet end of the first valve 30 to the first filter element 41, and the purified water filtered from the first filter element 41 can flow out through the purified water outlet. For example, the purified water filtered from the first filter cartridge 41 may flow out of the purified water outlet 50 through the first filter pipe 411.

In an exemplary embodiment of the present disclosure, the first filter element 41 includes a clean water outlet and a waste water outlet, and a first waste water pipe 412 is disposed between the waste water outlet of the first filter element 41 and the water inlet end of the second filter element 42. First filter element 41 and second filter element 42 may communicate with each other through first waste pipe 412, so that waste water discharged from first filter element 41 may enter second filter element 42 through first waste pipe 412, and second filter element 42 may filter the waste water again.

When the water purifier 10 is in the first shift position, the first waste water discharge passage 415 of the first filter element 41 is closed, and waste water discharged from the first filter element 41 can enter the second filter element 42, and waste water entering the second filter element 42 is filtered and filtered out of the second filter element 42, and then flows out through the purified water outlet. For example, the purified water filtered from the second filter cartridge 42 may flow out of the purified water outlet 50 through the second filter pipe 421.

In an exemplary embodiment of the present disclosure, the first wastewater discharge passage 415 may communicate with the first wastewater pipe 412, but the present disclosure is not limited thereto, and in other possible embodiments, the first wastewater discharge passage 415 may not communicate with the first wastewater pipe 412.

In the present disclosure, a second valve 413 may be further provided on the first waste pipe 412. For example, the second valve 413 may be a solenoid valve, and may control the wastewater discharged from the first filter element 41 to flow into the first second filter element or control the wastewater discharged from the first filter element 41 to be discharged through the first wastewater pipe 412 according to a difference in an electric signal. The electric signal can be an electric signal sent by a control module of the water purifier.

In the disclosed exemplary embodiment, the water purifier 10 further includes a purified water outlet 50. For example, in a state where water purifier 10 is in the first gear position, second valve 413 is configured to close first wastewater discharge passage 415. For example, the first switch of the second valve 413 may be closed, and the waste water discharged from the first filter element 41 cannot be discharged through the first waste water discharge passage 415 by the second valve 413, but flows into the second filter element 42 only through the first waste water pipe 412. In this case, the inlet water from the inlet portion 20 enters the first filter cartridge 41 through the first valve 30, and the water filtered by the first filter cartridge 41 flows out of the purified water outlet 50 through the first filter pipe 411.

Meanwhile, in this case (the water purifier is in the first position), the wastewater discharged from the first filter element 41 flows into the second filter element 42 through the second valve 413, is filtered in the second filter element 42, then flows out of the second filter element 42, and flows out of the purified water outlet 50 through the second filter pipe 421.

In summary, when the first valve 30 is in the first shift position, the clean water filtered by the first filter element 41 and the waste water from the first filter element 41 enter the second filter element 42, and the clean water filtered by the second filter element 42 is discharged through the clean water outlet 50. The water exiting the clean water outlet 50 includes water filtered from the first filter element 41 plus water filtered from the second filter element 42. The amount of water discharged from the purified water outlet 50 at this time is different from the amount of water filtered by the first filter element 41 alone and the amount of water filtered by the second filter element 42 alone.

Fig. 2 is a schematic view illustrating a water purifier according to another exemplary embodiment, and as shown in fig. 2, in the present disclosure, a check valve 414 may be further disposed on the first waste pipe 412, and the check valve 414 may be configured to allow waste water filtered out of the first filter element 41 to flow into the water inlet end of the second filter element 42. The check valve 414 may prevent backflow of wastewater within the first wastewater pipe 412.

The one-way valve 414 is configured to allow flow from the waste outlet of the first filter element 41 to the inlet end of the second filter element 42 and to prevent reverse flow. Can prevent like this to stay the water of second filter core 42 backward flow through first waste pipe 412, on the one hand, can promote the efficiency of second filter core 42 drainage, on the other hand avoids backward flow, can avoid waste water to cause the pollution to the water purification that first filter core 41 or first filter core 41 filtered out.

In the present exemplary embodiment, for example, the water purifier 10 is in the first position, and the second valve 413 is configured to close the first waste-water discharge passage 415. For example, the first switch of the second valve 413 may be closed, and the waste water discharged from the first filter element 41 cannot be discharged through the first waste water discharge passage 415 via the second valve 413, but can flow into the second filter element 42 only via the first waste water pipe 412 and the check valve 414.

As shown in fig. 1 and 2, in an exemplary embodiment of the present disclosure, the water purifier 10 may further include a waste water outlet.

In the disclosed exemplary embodiment, the water purifier 10 may further include a second gear and a third gear. When the water purifier 10 is in the second position, the second water path is connected, and the first waste water discharge path 415 is connected. The second water path is open, that is, after the water flow enters the first valve 30 from the water inlet part 20, the water flow flows out from the first water outlet end to the first filter element 41, and the purified water filtered by the first filter element 41 flows out through the purified water outlet 50.

In the present disclosure, the water purifier 10 is in the second position, and the control module may control the first valve 30 such that the water flowing from the water inlet 20 flows into the first filter element 41. For example, the first valve 30 can be in the second position, the first water outlet end of the first valve 30 is communicated with the first filter element 41, and the purified water filtered by the first filter element 41 is discharged through the purified water outlet 50 via the first filter pipe 411.

In this case, the second switch of the second valve 413 is closed, and the waste water discharged from the first filter element 41 can be discharged through the first waste water discharge passage 415, that is, when the water purifier 10 is in the second position, the water purifier 10 can filter only the water filtered by the first filter element 41 and only the water filtered by the first filter element 41 can flow out.

In the exemplary embodiment of the present disclosure, when the water purifier 10 is in the third gear, the third water path is turned on, that is, after the water enters the first valve 30 from the water inlet 20, the water flows out from the second water outlet end to the second filter element 42, and the purified water filtered by the second filter element 42 flows out through the purified water outlet 50. Meanwhile, the waste water discharged from the second filter cartridge 42 is discharged through the second waste water discharge path 422.

In the exemplary embodiment of the present disclosure, when the water purifier 10 is in the third position, the water purifier 10 may filter only by the second filter element 42, and only the water filtered by the second filter element 42 may flow out.

In the present disclosure, the water purifier 10 may further include a fourth gear. When the water purifier 10 is in the fourth position, the fourth water path is turned on, and the first wastewater discharge path 415 is closed. The fourth waterway is open, that is, after the water enters the first valve 30 from the water inlet 20, the water flows out to the first filter element 41 and the second filter element 42 from the first water outlet end and the second water outlet end, respectively, the purified water filtered by the first filter element 41 flows out through the purified water outlet 50, and the purified water filtered by the second filter element 42 flows out through the purified water outlet 50.

In the present disclosure, when the water purifier 10 is in the fourth position, the wastewater discharged from the first filter element 41 may be discharged through the first wastewater discharge path 415, and the wastewater discharged from the second filter element 42 may be discharged through the second wastewater discharge path 422.

In the present disclosure, when the water purifier 10 is in the fourth shift position, the water purifier 10 may simultaneously filter water through the first filter element 41 and the second filter element 42, and simultaneously flow out the purified water filtered by the first filter element 41 and the second filter element 42. The waste water discharged from the first filter element 41 and the second filter element 42 can be discharged from the first waste water discharge passage 415 and the second waste water discharge passage 422, respectively.

In an exemplary embodiment of the present disclosure, the water inlet part 20 may include a variable frequency water pump, and the variable frequency water pump may control a water outlet amount of the water inlet part 20. The pump rate of the variable frequency water pump is different according to the gear of the water purifier 10. For example, if the user turns on a faucet and selects a first gear, the control module of the water purifier 10 may control the variable frequency water pump to have a first pump rate, and the water inlet 20 may provide water at a first flow rate. The second gear is selected, and the control module of the water purifier 10 can control the variable frequency water pump to have a second pumping rate, and the water inlet portion 20 can provide water at a second flow rate. And a third gear is selected, the control module of the water purifier 10 can control the variable frequency water pump to have a third pump rate, and the water inlet part 20 can provide water at a third flow rate. Select the fourth gear, then the control module group of water purifier 10 can control the frequency conversion water pump and have the fourth pump rate, and the portion of intaking 20 can provide the water of the fourth velocity of flow.

In the exemplary embodiment of the present disclosure, a control module may be disposed in the water purifier 10, and the control module may transmit control signals to the variable frequency water pump, the first valve and the second valve to control the variable frequency water pump, the first valve and the second valve to transmit control signals to cooperate with each other, so as to achieve corresponding functions.

Water with different flow rates can flow into the first filter membrane or the second filter membrane according to different areas of the filter membranes in the filter element. For example, the effective filter membrane area of the first filter element 41 is larger than that of the second filter element 42, and the first flow rate is larger than the second flow rate, then, in the first shift position, water having the first flow rate can flow into the first filter element 41.

Likewise, in a second gear, water having a second flow rate can flow into first cartridge 41. In a third gear, water having a third flow rate may flow into second filter element 42.

The present disclosure is not so limited and, in some embodiments, the effective filter membrane area of the first filter element 41 may be greater than the effective filter membrane area of the second filter element 42.

For example, in some embodiments, the effective filter membrane area of the first filter element 41 is from 0.8 to 1.5 square meters, for example the effective filter membrane area of the first filter element can be 1.16 square meters.

For example, in some embodiments, the second filter element 42 has an effective filter membrane area of from 2 to 3 square meters. For example, the effective filter membrane area of the second filter element 42 can be about 2.32 square meters.

In the present disclosure, the sum of the effective filter membrane area of the first filter element 41 and the effective filter membrane area of the second filter element 42 may be 2.8 to 4.5 square meters. In one embodiment, the sum of the effective filter membrane area of the first filter element 41 and the effective filter membrane area of the second filter element 42 can be about 3.48 square meters.

Particularly, the present disclosure provides a water purifier, which can include a variable frequency water pump, a two-in-and-out solenoid valve, a first filter element and a second filter element.

During the use, open tap, select first gear, corresponding speed is adjusted to the variable frequency water pump, goes out the pure water from tap behind the first filter core, and the waste water solenoid valve opens, and the waste water of discharging via the passageway filters via the second filter core, produces pure water and first filter core and produces the pure water and flow out by tap after crossing, produces waste water by passageway discharge sewer.

And opening the water faucet, selecting a second gear, adjusting the corresponding speed of the variable-frequency water pump, allowing water to enter the variable-frequency water pump through the one-inlet two-outlet electromagnetic valve, allowing the water to flow out of pure water from the water faucet after passing through the first filter element, and opening the wastewater electromagnetic valve to generate wastewater which is discharged out of a sewer through the passage.

And opening the water faucet, selecting a third gear, adjusting the corresponding speed by the variable frequency water pump, allowing the inlet water to pass through the one-inlet-two-outlet electromagnetic valve, discharging pure water from the water faucet after passing through the second filter element, and discharging wastewater from the wastewater outlet.

In the present disclosure, the power of the first gear may be 1200G, the power of the second gear may be 400G, and the power of the third gear may be 800G.

The problem of the unable flow regulation of current water purifier has been solved in this disclosed setting, can let the user have more and use the selection.

Note that the present disclosure is not limited thereto, and in an exemplary embodiment of the present disclosure, the effective filter membrane area of the first filter element 41 may also be the same as the effective filter membrane area of the second filter element 42.

In an exemplary embodiment of the present disclosure, the first filter element 41 may include a reverse osmosis membrane (RO membrane). In exemplary embodiments of the present disclosure, the second filter element 42 may also comprise a reverse osmosis membrane.

It is understood that, in order to implement the above functions, the water purifier provided in the embodiments of the present disclosure includes a hardware structure and/or a software module corresponding to each function. The disclosed embodiments can be implemented in hardware or a combination of hardware and computer software, in combination with the exemplary elements and algorithm steps disclosed in the disclosed embodiments. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It will be further appreciated that while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the scope of the appended claims.

Claims

1. A water purifier, characterized by comprising:

a water inlet part (20);

a purified water outlet (50);

a plurality of filter elements at least comprising a first filter element (41) and a second filter element (42) which are respectively communicated with the water inlet part (20); and

a first valve (30) comprising at least a first outlet end and a second outlet end, said first outlet end communicating with said first filter element (41) and said second outlet end communicating with said second filter element (42);

wherein, when the water purifier (10) is in a first gear state, the first water path is conducted, and the first wastewater discharge path (415) of the first filter element (41) is closed,

the first waterway conduction is as follows: after entering the first valve (30) from the water inlet part (20), the water flows out from the first water outlet end to the first filter element (41), and the purified water filtered by the first filter element (41) flows out through the purified water outlet (50); and

the waste water discharged from the first filter element (41) enters the second filter element (42), and the purified water filtered by the second filter element (42) flows out through the purified water outlet (50).

2. The water purifier according to claim 1,

the first filter element (41) comprises a purified water outlet and a waste water outlet;

a first waste water pipe (412) is arranged between the waste water outlet of the first filter element (41) and the water inlet end of the second filter element (42);

a one-way valve (414) is disposed on the first waste (412), the one-way valve (414) configured to allow flow from the waste outlet of the first filter element (41) to the inlet end of the second filter element (42) and to inhibit reverse flow.

3. The water purifier according to claim 2,

the first waste water discharge passage (415) is in communication with the first waste water pipe (412);

a second valve (413) is provided on the first waste water discharge passage (415), and the second valve (413) is configured to close the first waste water discharge passage (415) in a state where the water purifier (10) is in the first gear.

4. The water purifier according to claim 3,

when the water purifier (10) is in a second gear state, the second water path is conducted, the first wastewater discharge path (415) is conducted,

wherein, the second water route switches on and is: after entering the first valve (30) from the water inlet part (20), the water flows out from the first water outlet end to the first filter element (41), and the purified water filtered by the first filter element (41) flows out through the purified water outlet (50); and

the wastewater discharged from the first filter element (41) is discharged through the first wastewater discharge passage (415).

5. The water purifier according to claim 4,

the third water path is communicated when the water purifier (10) is in a third gear state,

wherein the third waterway conduction is as follows: after entering the first valve (30) from the water inlet part (20), the water flows out from the second water outlet end to the second filter element (42), and the purified water filtered by the second filter element (42) flows out through the purified water outlet (50); and

the wastewater discharged from the second filter element (42) is discharged through a second wastewater discharge path (422).

6. The water purifier according to claim 5,

when the water purifier (10) is in a fourth gear position, a fourth water path is conducted, and the first wastewater discharge passage (415) is closed,

wherein, the fourth water route switches on and is: after entering the first valve (30) from the water inlet part (20), the water flows out from the first water outlet end and the second water outlet end to the first filter element (41) and the second filter element (42), the purified water filtered by the first filter element (41) flows out through the purified water outlet (50), and the purified water filtered by the second filter element (42) flows out through the purified water outlet (50); and

the wastewater discharged from the first filter element (41) is discharged through the first wastewater discharge passage (415), and the wastewater discharged from the second filter element (42) is discharged through the second wastewater discharge passage (422).

7. The water purifier according to any one of claims 3 to 6,

the first valve (30) is an electromagnetic valve; and/or

The second valve (413) is an electromagnetic valve.

8. The water purifier according to any one of claims 1 to 6,

the water inlet part (20) comprises a variable frequency water pump.

9. The water purifier according to claim 8,

according to the different gears of the water purifier (10), the pump rate of the variable frequency water pump is different.

10. The water purifier according to any one of claims 1 to 6,

the effective filter membrane area of the first filter element (41) is the same as that of the second filter element (42); or

The effective filter membrane area of the first filter element (41) is different from the effective filter membrane area of the second filter element (42).

11. The water purifier according to claim 10,

the first filter element (41) comprises a reverse osmosis membrane; and/or

The second filter element (42) comprises a reverse osmosis membrane.