CN220891206U

CN220891206U - Water purifier and waste water valve thereof

Info

Publication number: CN220891206U
Application number: CN202322550840.2U
Authority: CN
Inventors: 郭增前; 李键; 谭俊; 张吉夫; 冯栋兵
Original assignee: Qingdao Haier Strauss Technology Co ltd; Qingdao Haier Strauss Water Equipment Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Strauss Technology Co ltd; Qingdao Haier Strauss Water Equipment Co Ltd; Haier Smart Home Co Ltd
Priority date: 2023-09-19
Filing date: 2023-09-19
Publication date: 2024-05-03
Anticipated expiration: 2033-09-19

Abstract

The utility model relates to the technical field of water purifiers, in particular to a water purifier and a waste water valve thereof, and aims to solve the problem that the waste water valve of the existing water purifier cannot release pressure when the pressure in front of a membrane is increased. For this purpose, the utility model provides a water purifier and a waste water valve thereof, wherein the waste water valve comprises a valve body, a partition member for partitioning a valve cavity of the valve body into a first cavity and a second cavity, and a water inlet and a water outlet which are respectively communicated with the first cavity and the second cavity, a water flow channel for connecting the two cavities is arranged on the partition member and is provided with a switching mechanism, the water flow channel is in a first communication state when the water pressure of the first cavity is larger than a first set water pressure and not larger than a second set water pressure, the switching mechanism enables the water flow channel to be in a second communication state when the water pressure of the first cavity is larger than the second set water pressure, and the effective flow area of the water flow channel in the first communication state is smaller than the effective flow area of the water inlet and the effective flow area of the water outlet in the second communication state.

Description

Water purifier and waste water valve thereof

Technical Field

The utility model relates to the technical field of water purifiers, and particularly provides a water purifier and a waste water valve thereof.

Background

Along with the promotion of health consciousness, more families begin to pay attention to drinking water health, and the water purifier becomes a stock household appliance in the vast families.

In the use process of the water purifier, the water temperatures of different air temperatures are different, water in different areas has different water quality, the water inlet pressure of the same water purifier is changed under the condition that the water inlet pressure is increased, the water temperature is reduced, the water quality is poor, or factors such as pollution blocking after the filter element is used can cause the membrane front pressure of the water purifier to be increased, and the membrane front pressure is increased to cause the problems of electric control load increase, machine bearing increase and noise increase. The waste water pipe of the water purifier is provided with a waste water valve, the waste water valve controls the clean waste ratio of the water purifier through the small flow limiting hole, the clean waste ratio is kept unchanged in the process of preparing pure water by the water purifier, and the waste water valve on the water purifier cannot release pressure when the pressure in front of the membrane is increased.

Accordingly, there is a need in the art for a new solution to the above-mentioned problems.

Disclosure of utility model

The utility model aims to solve the technical problems that the waste water valve of the existing water purifier cannot release pressure when the pressure in front of a membrane is increased.

In a first aspect, the utility model provides a waste water valve of a water purifier, the waste water valve comprises a valve body, a partition member for dividing a valve cavity of the valve body into a first cavity and a second cavity is arranged in the valve cavity of the valve body, a water inlet and a water outlet which are respectively communicated with the first cavity and the second cavity are arranged on the valve body, and a water flow channel for connecting the first cavity and the second cavity is arranged on the partition member; the water flow channel is provided with a switching mechanism, the water flow channel is in a first communication state when the water pressure in the first cavity is larger than a first set water pressure and not larger than a second set water pressure, and the switching mechanism is under the action of the water pressure when the water pressure in the first cavity is larger than the second set water pressure so that the water flow channel is in a second communication state; the effective flow area of the water flow channel in the first communication state is smaller than the effective flow area of the water flow channel in the second communication state and the effective flow areas of the water inlet and the water outlet, and the first set water pressure is smaller than the second set water pressure.

In a preferred technical solution of the above waste water valve, the partition is provided with a through hole forming the water flow channel, the switching mechanism includes an elastic member with a fixed first end and a cover connected to a second end of the elastic member, and the cover is located in the second chamber; when no water flows out of the first chamber, the covering piece is abutted against one end of the through hole, which faces the second chamber, under the action of the elasticity of the elastic piece, so that the through hole is blocked; when the water pressure in the first cavity is larger than a first set water pressure and not larger than a second set water pressure, the elastic piece is in a first deformation state under the action of the water pressure, so that the covering piece is in a first state of moving away from the through hole, and the through hole is in the first communication state; when the water pressure in the first cavity is larger than the second set water pressure, the elastic piece is in a second deformation state under the action of the water pressure, so that the covering piece is in a second state of moving away from the through hole, and the through hole is in the second communication state.

In the preferable technical scheme of the waste water valve, a through hole is formed in the partition piece, the switching mechanism comprises an elastic piece with a fixed first end and a covering piece connected to a second end of the elastic piece, the covering piece is located in the second cavity, a through water hole is formed in the covering piece, and the through hole and the water hole form the water flow channel; when the water pressure in the first cavity is larger than a first set water pressure and not larger than a second set water pressure, the covering piece is abutted against one end of the through hole towards the second cavity under the action of the elastic force of the elastic piece, and the water passing hole is communicated with the through hole and the second cavity so that the through hole is in the first communication state; when the water pressure in the first cavity is larger than the second set water pressure, the elastic piece is further deformed under the action of the water pressure so that the covering piece is in a state of being moved away from the through hole, and the through hole is in the second communication state; the effective flow area of the water passing hole is smaller than that of the through hole.

In the preferable technical scheme of the waste water valve, the partition piece is provided with a first through hole and a second through hole which form the water flow channel, the second through hole is always in a communication state, the switching mechanism comprises an elastic piece with a fixed first end and a covering piece connected with a second end of the elastic piece, and the covering piece is positioned in the second cavity; when the water pressure in the first cavity is larger than a first set water pressure and not larger than a second set water pressure, the covering piece is abutted against one end of the first through hole towards the second cavity under the action of the elastic force of the elastic piece to seal the first through hole, so that the water flow channel is in the first communication state; when the water pressure in the first cavity is larger than the second set water pressure, the elastic piece is further deformed under the action of the water pressure, so that the covering piece is in a state of being moved away from the first through hole, the first through hole is opened, and the water flow channel is in the second communication state.

In a preferred embodiment of the above waste water valve, at least an outer surface portion of the cover is made of an elastic material.

In a preferred embodiment of the above waste water valve, the covering member is a rubber block.

In the preferable technical scheme of the waste water valve, the elastic piece is a spring.

In the preferable technical scheme of the waste water valve, the first end of the elastic piece is fixedly connected with the valve body, and the elastic piece is always in a compressed state; or the first end of the elastic piece is fixedly connected with the partition piece, and the elasticity is always in a stretching state.

In the preferable technical scheme of the waste water valve, the partition piece is further provided with a flushing channel for connecting the first chamber and the second chamber, and the flushing channel is provided with an opening and closing mechanism for switching the on-off state of the flushing channel.

Under the condition that the technical scheme is adopted, the waste water valve of the water purifier comprises a valve body, a separating piece for separating the valve cavity into a first cavity and a second cavity is arranged in the valve cavity of the valve body, a water inlet and a water outlet which are respectively communicated with the first cavity and the second cavity are arranged on the valve body, a water flow channel which is connected with the first cavity and the second cavity is arranged on the separating piece, the water flow channel is provided with a switching mechanism, the water flow channel is in a first communication state when the water pressure in the first cavity is larger than a first set water pressure and not larger than a second set water pressure, the water flow channel is in a second communication state under the action of the switching mechanism when the water pressure in the first cavity is larger than the second set water pressure, and the effective flow area of the water flow channel in the first communication state is smaller than the effective flow area of the second communication state and the effective flow area of the water inlet and the water outlet, and the first set water pressure is smaller than the second set water pressure.

Through such setting, in the purifier work engineering of installing above-mentioned waste water valve, if the pressure is in normal range before the membrane, the water pressure in the first cavity of waste water valve is not greater than the second and sets for water pressure, and the rivers passageway is in first communication state this moment, and the waste water that produces in the water purification process discharges after flowing through first cavity, rivers passageway, second cavity in proper order. When the pressure before the membrane becomes big and exceeds normal pressure range, the water pressure in the first cavity of waste water valve is greater than the second and presumes the water pressure, and rivers passageway is in the second intercommunication state this moment, and the waste water that produces in the water purification process flows through first cavity, rivers passageway, second cavity back in proper order and discharges, and rivers passageway is in the second intercommunication state and makes the effective flow area increase of rivers passageway, reduces the resistance that waste water flows, and then reduces the pressure before the membrane, realizes the pressure release, avoids the too big condition of pressure to appear before the membrane of purifier.

In a second aspect, the utility model also provides a water purifier, which comprises the waste water valve of the water purifier.

It should be noted that the water purifier has all the technical effects of the waste water valve of the water purifier according to any one of the above technical schemes, and will not be described herein.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic top view of a waste valve according to a first embodiment of the present utility model;

FIG. 2 is a schematic top view of a waste valve of a first embodiment of the present utility model with the upper cover removed;

FIG. 3 is a cross-sectional view taken along the plane A-A in FIG. 1;

FIG. 4 is a cross-sectional view taken along the plane B-B in FIG. 1;

FIG. 5 is a cross-sectional view of a waste valve according to a second embodiment of the present utility model taken along the plane B-B in FIG. 1;

fig. 6 is a cross-sectional view of a wastewater valve according to a third embodiment of the utility model taken along the B-B plane in fig. 1.

List of reference numerals:

1. A valve body; 11. a lower case; 111. a water inlet connecting pipe; 112. a water outlet connecting pipe; 12. an upper cover; 13. a first chamber; 14. a second chamber; 2. a partition; 21. a first through hole; 22. a second through hole; 23. an opening; 3. a switching mechanism; 31. a first spring; 32. a cover; 321. a water passing hole; 33. a bracket; 4. an opening and closing mechanism; 41. a housing; 42. a magnet; 421. a connecting rod; 422. a valve core; 43. an electromagnet; 44. and a second spring.

Detailed Description

First, it should be understood by those skilled in the art that the embodiments described below are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, it should be noted that, in the description of the present utility model, unless explicitly stated and limited otherwise, the term "connected" should be interpreted broadly, and for example, it may be a fixed connection, a detachable connection, or an integral connection, or a direct connection, or an indirect connection. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Based on the problem that the waste water valve of the existing water purifier cannot relieve pressure when the pressure in front of a membrane is increased, the waste water valve comprises a valve body, a partition piece for partitioning the valve cavity into a first cavity and a second cavity is arranged in the valve cavity of the valve body, a water inlet and a water outlet which are respectively communicated with the first cavity and the second cavity are arranged on the valve body, a water flow channel which is connected with the first cavity and the second cavity is arranged on the partition piece, the water flow channel is provided with a switching mechanism, the water flow channel is in a first communication state when the water pressure in the first cavity is larger than a first set water pressure and is not larger than a second set water pressure, the water flow channel is in a second communication state under the action of the water pressure when the water pressure in the first cavity is larger than the second set water pressure, the effective flow area of the water flow channel in the first communication state is smaller than the effective flow area of the first communication state and the effective flow area of the water inlet and the water outlet, and the effective flow area of the water outlet are arranged in the first communication state is smaller than the second set water pressure.

The waste water valve of the water purifier according to the present utility model will be described with reference to fig. 1 to 6. Wherein FIG. 1 is a schematic top view of a waste water valve according to a first embodiment of the present utility model;

FIG. 2 is a schematic top view of a waste valve of a first embodiment of the present utility model with the upper cover removed; FIG. 3 is a cross-sectional view taken along the plane A-A in FIG. 1; FIG. 4 is a cross-sectional view taken along the plane B-B in FIG. 1; FIG. 5 is a cross-sectional view of a waste valve according to a second embodiment of the present utility model taken along the plane B-B in FIG. 1; fig. 6 is a cross-sectional view of a wastewater valve according to a third embodiment of the utility model taken along the B-B plane in fig. 1.

As shown in fig. 1 to 4, in the first embodiment of the present utility model, the waste water valve comprises a valve body 1, the valve body 1 comprises a lower shell 11 and an upper cover 12 arranged at the top of the lower shell 11, a valve cavity of the valve body 1 is formed between the lower shell 11 and the upper cover 12, a partition 2 is arranged in the valve cavity of the valve body 1, the valve cavity is divided into a first cavity 13 and a second cavity 14 by the partition 2, a water inlet connecting pipe 111 and a water outlet connecting pipe 112 are arranged on the valve body 1, a water inlet communicated with the first cavity 13 is formed in the water inlet connecting pipe 111, and a water outlet communicated with the second cavity 14 is formed in the water outlet connecting pipe 112. The partition 2 is a vertically extending cylindrical member, the lower end of the partition 2 is fixedly connected with the bottom inner wall of the lower shell 11, a first through hole 21 is formed in the side wall of the partition 2, the first through hole 21 forms a water flow channel for connecting the first chamber 13 and the second chamber 14, an opening 23 is formed in the top of the partition 2, and the opening 23 forms a flushing channel for connecting the first chamber 13 and the second chamber 14.

The water flow passage is provided with a switching mechanism 3, the switching mechanism 3 comprises a first spring 31, a cover 32 and a bracket 33, the bracket 33 is positioned in the second chamber 14 and fixedly connected with the bottom inner wall of the lower shell 11, a first end of the first spring 31 is fixedly connected with the bracket 33, a second end of the first spring 31 is connected with the cover 32, the cover 32 is positioned in the second chamber 14, the first spring 31 is in a compressed state and the cover 32 is abutted against one end of the first through hole 21 facing the second chamber 14, so that the cover 32 seals the first through hole 21.

The flushing passage is provided with an opening and closing mechanism 4 for switching the gas on-off state, the opening and closing mechanism 4 includes a housing 41, a magnet 42, a link 421, a valve core 422, an electromagnet 43, and a second spring 44, the magnet 42 is provided in the housing 41 and is connected to the inner wall of the housing 41 in a vertically sliding manner, the electromagnet 43 is provided at the top in the housing 41, the electromagnet 43 and the magnet 42 are directly connected through the second spring 44, and the second spring 44 is in a compressed state. In a state in which the electromagnet 43 is not energized, the magnet 42 is pressed against a position near the bottom inside the housing 41 by the elastic force of the second spring 44, so that the valve spool 422 abuts against the opening 23 at the upper portion of the partitioning member 2 to close the opening 23.

The water flow channel is in a first communication state when the water pressure in the first chamber 13 is larger than a first set water pressure and not larger than a second set water pressure, and the water flow channel is in a second communication state under the action of the water pressure when the water pressure in the first chamber 13 is larger than the second set water pressure, the effective flow area of the water flow channel in the first communication state is smaller than the effective flow area of the water inlet and the water outlet in the second communication state, and the first set water pressure is smaller than the second set water pressure. The first set water pressure and the second set water pressure are affected by the elastic force of the first spring 31, and parameters of the first spring 31 may be set according to specific needs during the manufacturing stage.

Referring to fig. 4, when the water purifier having the above-described waste water valve mounted therein is in a normal range of pressure before the membrane, a part of water before the membrane of the reverse osmosis filter cartridge of the water purifier passes through the reverse osmosis membrane under the action of water pressure and becomes pure water to flow out of the pure water pipe of the water purifier, salt ions such as calcium ions and magnesium ions in the water before the membrane are trapped by the reverse osmosis membrane, the concentration of calcium ions and magnesium ions before the membrane becomes large to form waste water, the waste water flows into the waste water pipe under the action of the water pressure of the water continuously flowing in, and after the waste water on the waste water pipe flows into the first chamber 13 of the waste water valve from the water inlet connection pipe 111, the pressure of the waste water in the first chamber 13 acting on the cover member 32 is greater than the elastic force of the first spring 31 so that the first spring 31 is further compressed by a certain deformation amount to reach a first deformed state, the cover member 32 moves to the left with the further compression of the first spring 31, a first gap communicating the first chamber 13 and the second chamber 14 is formed between the cover member 32 and the first through hole 21, and the water flow out of the waste water flow channel is in a first communicating state, and the waste water flow out of the first connecting pipe 13 flows out of the first chamber 14 through the first through hole 21. When the pressure before the membrane becomes larger than the normal pressure range due to various factors, the water pressure in the first chamber 13 of the waste water valve correspondingly becomes larger, the pressure of waste water in the first chamber 13 acting on the cover 32 is further increased, at the moment, the first spring 31 is further compressed by a certain deformation amount to reach a second deformation state, the cover 32 moves to the left along with the further compression of the first spring 31 to correspondingly displace, a second gap (the second gap is larger than the first gap) which is used for communicating the first chamber 13 and the second chamber 14 is formed between the cover 32 and the first through hole 21, at the moment, the water flow channel is in a second communication state, more waste water flows into the second chamber 14 through the water flow channel (the first through hole 21) and flows out of the water outlet connecting pipe 112, so that the pressure relief is realized, the pressure before the membrane is reduced, and the condition that the pressure before the membrane of the water purifier is excessively increased is avoided.

When the reverse osmosis filter element of the water purifier needs to be washed, the electromagnet 43 is electrified, suction force larger than the elastic force of the second spring 44 is generated between the electromagnet 43 and the magnet 42, the magnet 42 moves upwards for a certain distance, the valve core 422 and the connecting rod 421 move upwards along with the magnet 42 for the same distance, so that the opening 23 is opened, water entering the reverse osmosis filter element washes away salt ions such as calcium ions and magnesium ions trapped in front of the reverse osmosis membrane and is discharged from the waste water pipe, and at the moment, the waste water mainly flows through the water inlet connecting pipe 111, the first chamber 13, the opening 23, the second chamber 14 and the water outlet connecting pipe 112 of the waste water valve in sequence and flows out.

Referring to fig. 1 to 4 and as shown in fig. 5, in the second embodiment of the present utility model, unlike the first embodiment, a water passing hole 321 is provided in the cover 32, and the water passing hole 321 and the first through hole 21 form a water flow passage.

Referring to fig. 5, when the water purifier with the waste water valve is in a normal range of pressure before the membrane is used, a part of water before the membrane of the reverse osmosis filter element of the water purifier passes through the reverse osmosis membrane under the action of water pressure and becomes pure water to flow out of the pure water pipe of the water purifier, salt ions such as calcium ions and magnesium ions in the water before the membrane are trapped by the reverse osmosis membrane, the concentration of the calcium ions and the magnesium ions before the membrane becomes larger to form waste water, the waste water flows into the waste water pipe under the action of the water pressure of the water which continuously flows in, the waste water on the waste water pipe flows into the first chamber 13 of the waste water valve from the water inlet connection pipe 111, the pressure of the waste water in the first chamber 13 on the cover piece 32 is smaller than the elastic force of the first spring 31, the cover piece 32 is abutted against one end of the first through hole 21 towards the second chamber 14, at this time, the water through hole 321 is communicated with the first chamber 13 and the second chamber 14, the water flow channel is in a first communication state, and the waste water in the first chamber 13 flows into the second chamber 14 through the water through hole 321 and flows out of the water outlet connection pipe 112. When the pre-membrane pressure becomes greater than the normal pressure range due to various factors, the water pressure in the first chamber 13 of the waste water valve becomes correspondingly greater, the pressure of waste water in the first chamber 13 acting on the cover 32 is further increased, the pressure of waste water in the first chamber 13 acting on the cover 32 is greater than the elastic force of the first spring 31, so that the first spring 31 is further compressed by a certain deformation amount, the cover 32 moves to the left side correspondingly along with the further compression of the first spring 31, a gap for communicating the first chamber 13 and the second chamber 14 is formed between the cover 32 and the first through hole 21, at this time, the water flow channel is in a second communication state, more waste water flows into the second chamber 14 through the water flow channel (the first through hole 21 and the water flow hole 321) and flows out of the water outlet connecting pipe 112, pressure relief is realized, and the pre-membrane pressure is reduced.

Referring to fig. 1 to 4 and as shown in fig. 6, in the third embodiment of the present utility model, unlike the first embodiment, the side wall of the partition 2 is further provided with second through holes 22 which are always in a communication state, and the first through holes 21 and the second through holes 22 form water flow passages.

Referring to fig. 6, when the water purifier with the above waste water valve is in a normal range of pressure before the membrane, a part of water before the membrane of the reverse osmosis filter element of the water purifier passes through the reverse osmosis membrane under the action of water pressure and becomes pure water to flow out of the pure water pipe of the water purifier, salt ions such as calcium ions and magnesium ions in the water before the membrane are trapped by the reverse osmosis membrane, the concentration of the calcium ions and magnesium ions before the membrane becomes larger to form waste water, the waste water flows into the waste water pipe under the action of the water pressure of the water continuously flowing into the waste water pipe, after the waste water on the waste water pipe flows into the first chamber 13 of the waste water valve from the water inlet connection pipe 111, the pressure of the waste water in the first chamber 13 on the cover piece 32 is smaller than the elastic force of the first spring 31, the cover piece 32 is abutted against one end of the first through hole 21 towards the second chamber 14, at this time the second through hole 22 is communicated with the first chamber 13 and the second chamber 14, the water flow channel is in a first communication state, and the waste water in the first chamber 13 passes through the water flow channel (the second through hole 22) and flows out of the water outlet connection pipe 112. When the pre-membrane pressure becomes greater than the normal pressure range due to various factors, the water pressure in the first chamber 13 of the waste water valve becomes correspondingly greater, the pressure of the waste water in the first chamber 13 acting on the cover 32 is further increased, the pressure of the waste water in the first chamber 13 acting on the cover 32 is greater than the elastic force of the first spring 31, so that the first spring 31 is further compressed by a certain deformation amount, the cover 32 moves to the left side correspondingly along with the further compression of the first spring 31, a gap for communicating the first chamber 13 and the second chamber 14 is formed between the cover 32 and the first through hole 21, at this time, the water flow channel is in a second communication state, more waste water flows into the second chamber 14 through the water flow channel (the first through hole 21 and the second through hole 22) and flows out of the water outlet connecting pipe 112, pressure relief is realized, and the pre-membrane pressure is reduced.

Preferably, the cover 32 is a rubber block, so that noise generated when the cover 32 collides with the edge of the first through hole 21 can be reduced or even eliminated.

It should be noted that the covering member 32 is a rubber block, which is only a preferred arrangement, and may be adjusted in practical applications, for example, the covering member 32 may be a silica gel block or other feasible elastic block, or may be a composite structure including a hard body in the middle and an elastomer coated on the outer layer. In addition, the first end of the first spring 31 is fixed on the lower shell 11 through the bracket 33, and the first spring 31 is in a compressed state, which is only a specific arrangement mode, and can be adjusted in practical application, for example, the first end of the first spring 31 is fixedly connected with the partition 2, and the first spring 31 is always in a stretched state. In addition, the separator 2 is a cylindrical member, which is only a specific arrangement, and may be adjusted in practical applications, for example, the separator may be a flat plate, an L-shaped plate, or a plate of another shape.

In other possible embodiments, unlike the various embodiments described above, the opening 23 forming the flushing channel is not provided in the partition 2, and the switching mechanism 3 is not provided.

In addition, the utility model also provides a water purifier, which comprises the waste water valve of the water purifier in any one of the embodiments.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims

1. The waste water valve of the water purifier is characterized by comprising a valve body, wherein a partition piece for dividing the valve cavity into a first cavity and a second cavity is arranged in the valve cavity of the valve body, a water inlet and a water outlet which are respectively communicated with the first cavity and the second cavity are arranged on the valve body, and a water flow channel for connecting the first cavity and the second cavity is arranged on the partition piece;

The water flow channel is provided with a switching mechanism, the water flow channel is in a first communication state when the water pressure in the first cavity is larger than a first set water pressure and not larger than a second set water pressure, and the switching mechanism is under the action of the water pressure when the water pressure in the first cavity is larger than the second set water pressure so that the water flow channel is in a second communication state;

The effective flow area of the water flow channel in the first communication state is smaller than the effective flow area of the water flow channel in the second communication state and the effective flow areas of the water inlet and the water outlet, and the first set water pressure is smaller than the second set water pressure.

2. The waste valve of claim 1, wherein the partition is provided with a through hole forming the water flow passage, and the switching mechanism includes an elastic member having a first end fixed and a cover member coupled to a second end of the elastic member, the cover member being located in the second chamber;

When no water flows out of the first chamber, the covering piece is abutted against one end of the through hole, which faces the second chamber, under the action of the elasticity of the elastic piece, so that the through hole is blocked;

When the water pressure in the first cavity is larger than a first set water pressure and not larger than a second set water pressure, the elastic piece is in a first deformation state under the action of the water pressure, so that the covering piece is in a first state of moving away from the through hole, and the through hole is in the first communication state;

when the water pressure in the first cavity is larger than the second set water pressure, the elastic piece is in a second deformation state under the action of the water pressure, so that the covering piece is in a second state of moving away from the through hole, and the through hole is in the second communication state.

3. The waste water valve of claim 1, wherein the partition is provided with a through hole, the switching mechanism comprises an elastic member with a fixed first end and a cover member connected to a second end of the elastic member, the cover member is positioned in the second chamber, the cover member is provided with a water passing hole therethrough, and the through hole and the water passing hole form the water flow channel;

When the water pressure in the first cavity is larger than a first set water pressure and not larger than a second set water pressure, the covering piece is abutted against one end of the through hole towards the second cavity under the action of the elastic force of the elastic piece, and the water passing hole is communicated with the through hole and the second cavity so that the through hole is in the first communication state;

when the water pressure in the first cavity is larger than the second set water pressure, the elastic piece is further deformed under the action of the water pressure so that the covering piece is in a state of being moved away from the through hole, and the through hole is in the second communication state;

The effective flow area of the water passing hole is smaller than that of the through hole.

4. The waste water valve of claim 1, wherein the partition is provided with a first through hole and a second through hole forming the water flow channel, the second through hole is always in a communication state, and the switching mechanism comprises an elastic member with a fixed first end and a covering member connected to a second end of the elastic member, and the covering member is positioned in the second chamber;

When the water pressure in the first cavity is larger than a first set water pressure and not larger than a second set water pressure, the covering piece is abutted against one end of the first through hole towards the second cavity under the action of the elastic force of the elastic piece to seal the first through hole, so that the water flow channel is in the first communication state;

when the water pressure in the first cavity is larger than the second set water pressure, the elastic piece is further deformed under the action of the water pressure, so that the covering piece is in a state of being moved away from the first through hole, the first through hole is opened, and the water flow channel is in the second communication state.

5. The waste valve of any one of claims 2 to 4, wherein at least an outer surface portion of the cover is of resilient material.

6. The waste valve of claim 5, wherein the cover is a rubber block.

7. The waste valve of any one of claims 2 to 4, wherein the resilient member is a spring.

8. The waste valve of any one of claims 2 to 4, wherein the first end of the resilient member is fixedly connected to the valve body, the resilient member being always in a compressed state; or alternatively

The first end of the elastic piece is fixedly connected with the partition piece, and the elasticity is always in a stretching state.

9. The waste valve of any one of claims 1 to 4, wherein a flushing passage connecting the first chamber and the second chamber is further provided on the partition, and the flushing passage is provided with an opening and closing mechanism switching an on-off state thereof.

10. A water purifier comprising the waste valve of the water purifier of any one of claims 1 to 9.