CN115727153A - On-off valve, waste water valve component and water purification equipment - Google Patents

Abstract

The invention relates to the technical field of water purifying equipment, in particular to an on-off valve, a waste water valve assembly and water purifying equipment. The on-off valve includes: the valve body is provided with a first cavity, a second cavity and a third cavity, the second cavity is communicated with the first cavity, the first cavity is provided with a first water inlet and a second water inlet, the second cavity is communicated with the second water inlet and the second water outlet, and the third cavity is communicated with the second cavity; and the sealing elastic part is arranged in the second chamber and is suitable for providing elastic force for sealing the second water inlet and outlet, and the sealing elastic part is enabled to open or seal the second water inlet and outlet through the water pressure change in the first chamber. The waste water valve is sealed through the on-off valve, so that the waste water is prevented from being drained through the waste water valve when the water purifying equipment stops producing water; when the user got the pure water, it can go out water immediately to open tap, does not need latency when the user got the water, improves user experience.

Description

On-off valve, waste water valve component and water purification equipment

Technical Field

The invention relates to the technical field of water purifying equipment, in particular to an on-off valve, a waste water valve assembly and water purifying equipment.

Background

At present, water purification equipment such as a common water purifier comprises an RO (reverse osmosis) membrane, a wastewater electromagnetic valve and the like, wherein the wastewater electromagnetic valve comprises a valve body, a valve needle and the like, the valve body is provided with a wastewater hole, the wastewater hole is cleaned by utilizing the up-and-down movement of the valve needle, and the gap between the valve needle and the wastewater hole or the diameter of the wastewater hole of the up-and-down movement of the valve needle is used as wastewater flow for calculation. By the design requirements of clearance fit between the water scale and the valve needle and the waste water hole, the designed waste water hole is large, so that the valve needle can normally move, the design requirement is met by ensuring the flow of the waste water, the waste water can be effectively discharged, and the service life of the RO membrane is prolonged. However, due to the fact that the pressure of the RO membrane is larger than the atmospheric pressure, waste water in the RO membrane is discharged through the gap between the valve needle and the waste water hole, the waste water electromagnetic valve cannot achieve sealing, and then when pure water is taken, the situation that water cannot flow out of the faucet in the first few seconds is achieved, and user experience is affected. Wherein RO is an abbreviation for Reverse Osmosis, which means Reverse Osmosis.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the problem that when the water purifying equipment in the prior art stops making water, the wastewater in the RO membrane is drained through the gap between the valve needle and the wastewater hole, so that the water purifying equipment just opens ZLSQ20228163 when taking pure water

The water can not be discharged at first, thereby providing the on-off valve, the waste water valve component and the water purifying equipment.

In order to solve the above problems, the present invention provides an on-off valve including: the valve body is provided with a first cavity, a second cavity and a third cavity, the second cavity is communicated with the first cavity, the first cavity is provided with a first water inlet and a second water outlet, the second cavity is communicated with the second water inlet and the second water outlet, and the third cavity is communicated with the second cavity; and the sealing elastic part is arranged in the second chamber and is suitable for providing elastic force for sealing the second inlet and the second outlet, and the sealing elastic part is enabled to open or seal the second inlet and the second outlet through the water pressure change in the first chamber.

Optionally, one side of the second chamber facing the first chamber extends to the circumferential outer side of the first chamber to form a water flow chamber, the third chamber is communicated with the water flow chamber, and the sealing elastic part opens or seals the second water inlet and outlet through the water pressure change of the third chamber.

Optionally, the sealing elastic part includes: the sealing ring is in sealing fit with the inner wall of the second chamber; one end of the elastic piece is matched with one side, far away from the second water inlet and outlet, of the sealing ring, the other end of the elastic piece is fixed relative to the valve body, and the elastic piece provides elastic force for sealing the second water inlet and outlet for the sealing ring.

Optionally, the sealing elastic portion further includes a limiting member, the limiting member is fixed to a side of the second chamber away from the second water inlet/outlet, and the elastic member is located between the sealing ring and the limiting member.

Optionally, the limiting part comprises a pressing cylinder and a fixing sleeve, the fixing sleeve is fixed on one side of the second cavity far away from the second water inlet and outlet, the elastic part is arranged between the sealing ring and the pressing cylinder, and the fixing sleeve is sleeved on the outer side of the pressing cylinder.

Optionally, the third chamber has a third water inlet and outlet, the first water inlet and outlet is adapted to communicate with the wastewater port of the water treatment portion, and the third water inlet and outlet is adapted to communicate with the water inlet of the wastewater valve, or the first water inlet and outlet is adapted to communicate with the water inlet of the wastewater valve, and the third water inlet and outlet is adapted to communicate with the wastewater port of the water treatment portion.

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Optionally, the first cavity comprises a first water hole and a second water hole which are communicated with each other, an included angle is formed between the extending direction of the first water hole and the extending direction of the second water hole, a first water inlet and a first water outlet are formed at one end, far away from the second water hole, of the first water hole, a second water inlet and a second water outlet are formed at one end, far away from the first water hole, of the second water hole, and the extending direction of the third cavity is the same as the extending direction of the second water hole.

Optionally, the on-off valve further includes a fourth chamber, the fourth chamber is communicated with the third chamber, the fourth chamber has a fourth water inlet and outlet, and the fourth water inlet and outlet is suitable for being connected with the raw water branch.

The invention also provides a waste valve assembly comprising: the waste water valve and the on-off valve, and the water outlet of the on-off valve is connected with the water inlet of the waste water valve.

The invention also provides a water purification apparatus comprising: the waste water valve assembly is described above.

The invention has the following advantages:

1. when water is produced by the water purifying equipment, the wastewater enters the first chamber, when the water flow pressure in the first chamber is greater than the elastic force of the sealing elastic part, the water flow pressure in the first chamber pushes the sealing elastic part to move towards one side far away from the second water inlet and outlet, the second water inlet and outlet can be opened, at the moment, the part of the second chamber, which is positioned at one side of the sealing elastic part, facing the first chamber is communicated with the first chamber, and the wastewater flows into the third chamber after passing through the part of the second chamber communicated with the first chamber and then flows into the wastewater valve; when the water purifying equipment stops making water, the water flow pressure in the first cavity is reduced, the elastic force of the sealing elastic part is larger than the water flow pressure in the first cavity, the sealing elastic part moves towards the second water inlet and outlet and seals the second water inlet and outlet, at the moment, wastewater cannot flow into the third cavity and further cannot flow into the wastewater valve, the wastewater valve is sealed through the on-off valve, and the wastewater is prevented from being discharged through the wastewater valve when the water purifying equipment stops making water; when the user got the pure water, it can go out water immediately to open tap, does not need latency when the user took the water, improves user experience.

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2. The sealing elastic part opens or seals the second water inlet and outlet through the water pressure change of the third chamber. The third chamber is provided with a third water inlet and outlet, the first water inlet and outlet is used as a water inlet of the on-off valve, the third water inlet and outlet is used as a water outlet of the on-off valve, or the first water inlet and outlet is used as a water outlet of the on-off valve, the third water inlet and outlet is used as a water inlet of the on-off valve, at the moment, the water inlet and the water outlet of the on-off valve are one, the on-off valve can realize bidirectional sealing, and the application range is wider.

3. The elastic force is applied to the sealing ring through the elastic piece, so that the sealing ring can be ensured to be more reliable in sealing the second water inlet and outlet.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows a schematic top view of a shut-off valve of an embodiment of the present invention;

FIG. 2 showsbase:Sub>A schematic sectional view A-A of the on-off valve of FIG. 1;

FIG. 3 shows a schematic cross-sectional view of the sealing ring of the shut-off valve of FIG. 2 opening the second water inlet and outlet;

FIG. 4 shows a schematic cross-sectional view of the valve body of the on-off valve of FIG. 1;

fig. 5 shows a rear view of the on-off valve of fig. 1.

Description of the reference numerals:

10. a valve body; 11. a first chamber; 111. a first water inlet and outlet; 112. a second water inlet and outlet; 12. a second chamber; 121. an outer bore section; 122. an inner bore section; 123. a water flow chamber; 124. an annular groove; ZLSQ20228163

13. A third chamber; 131. a third water inlet and outlet; 14. a fourth chamber; 141. a fourth water inlet and outlet; 20. a sealing elastic part; 21. a seal ring; 22. an elastic member; 23. a stopper; 231. fixing a sleeve; 232. and (5) pressing the cylinder.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. 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 the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the technical features involved in the different embodiments of the invention described below are as long as it is ZLSQ20228163

All of which can be combined without conflict.

Among the prior art, when water purification unit stopped making water, waste water in the RO membrane was discharged through the clearance between needle and the waste water hole, make one side pressure at the waste water place of RO membrane equal atmospheric pressure, when getting the pure water, the pressure at one side at the waste water place in the RO membrane needs several seconds time could be greater than atmospheric pressure, only when one side pressure at the waste water place of RO membrane is greater than atmospheric pressure, tap just begins to go out water, so, there is the condition that tap just can not go out water when getting the pure water, need wait for several seconds when the user gets water, user experience is poor.

In order to solve the above problem, as shown in fig. 1 to 3, the on-off valve of the present embodiment includes: the valve body 10 is provided with a first cavity 11, a second cavity 12 and a third cavity 13, the second cavity 12 is communicated with the first cavity 11, the first cavity 11 is provided with a first water inlet and outlet 111 and a second water inlet and outlet 112, the second cavity 12 is communicated with the second water inlet and outlet 112, and the third cavity 13 is communicated with the second cavity 12; the sealing elastic part 20 is disposed in the second chamber 12 and is adapted to provide an elastic force for sealing the second inlet/outlet port 112, and the sealing elastic part 20 opens or seals the second inlet/outlet port 112 by a change in water pressure in the first chamber 11. It should be noted that the on-off valve is applied to the water purifying apparatus, the first water inlet/outlet 111 of the on-off valve is communicated with the wastewater outlet of the water treatment portion, and the third chamber 13 of the on-off valve is communicated with the water inlet of the wastewater valve.

By applying the on-off valve of the embodiment, the first water inlet/outlet 111 of the on-off valve is communicated with the wastewater outlet of the water treatment part, the third chamber 13 of the on-off valve is communicated with the water inlet of the wastewater valve, when water is produced by the water purification equipment, wastewater enters the first chamber 11, when the water flow pressure in the first chamber 11 is greater than the elastic force of the sealing elastic part 20, the water flow pressure in the first chamber 11 pushes the sealing elastic part 20 to move towards one side far away from the second water inlet/outlet 112, the second water inlet/outlet 112 can be opened, at this moment, the part of the second chamber 12, which is located at one side of the sealing elastic part 20 towards the first chamber 11, is communicated with the first chamber 11, ZLSQ20228163

The wastewater flows into the third chamber 13 through the portion of the second chamber 12 communicating with the first chamber 11 and then into the wastewater valve; when the water purifying equipment stops making water, the water flow pressure in the first cavity 11 is reduced, the elastic force of the sealing elastic part 20 is greater than the water flow pressure in the first cavity 11, the sealing elastic part 20 moves towards the second water inlet and outlet 112 and seals the second water inlet and outlet 112, at the moment, wastewater cannot flow into the third cavity 13 and further cannot flow into the wastewater valve, the wastewater valve is sealed through the on-off valve, and the wastewater is prevented from being discharged through the wastewater valve when the water purifying equipment stops making water; when the user got the pure water, it can go out water immediately to open tap, does not need latency when the user got the water, improves user experience.

In the present embodiment, as shown in fig. 2 to 4, the second chamber 12 extends toward one side of the first chamber 11 to the circumferential outer side of the first chamber 11 to form a water flow cavity 123, the third chamber 13 communicates with the water flow cavity 123, and the sealing elastic part 20 opens or seals the second water inlet/outlet 112 by the water pressure change of the third chamber 13. The third chamber 13 has a third water inlet and outlet 131, the first water inlet and outlet 111 is as the water inlet of the on-off valve, the third water inlet and outlet 131 is as the water outlet of the on-off valve, or the first water inlet and outlet 111 is as the water outlet of the on-off valve, the third water inlet and outlet 131 is as the water inlet of the on-off valve, at this moment, the water inlet and the water outlet of the on-off valve are one, the on-off valve can realize bidirectional sealing, and the application range is wider. Specifically, the water flow chamber 123 is an annular chamber or an arc chamber.

In the present embodiment, as shown in fig. 2 and 3, the seal elastic portion 20 includes: a sealing ring 21 and an elastic member 22, wherein the sealing ring 21 is in sealing fit with the inner wall of the second chamber 12; one end of the elastic member 22 is engaged with a side of the sealing ring 21 far away from the second water inlet/outlet 112, and the other end of the elastic member 22 is fixed relative to the valve body 10, and the elastic member 22 provides an elastic force for sealing the second water inlet/outlet 112 for the sealing ring 21, that is, the elastic member 22 provides an elastic force for the sealing ring 21 towards the second water inlet/outlet 112. The elastic member 22 applies an elastic force to the sealing ring 21, so that the sealing ring 21 can be ensured to be more reliably sealed when sealing the second water inlet/outlet 112. Specifically, the elastic member 22 is a spring, an elastic sleeve, an elastic column, or the like. ZLSQ20228163

As an alternative embodiment, the elastic member 22 may not be provided, the sealing ring 21 itself has elasticity, and the second water inlet/outlet 112 may be sealed.

In this embodiment, the sealing elastic portion 20 further includes a limiting member 23, the limiting member 23 is fixed on a side of the second chamber 12 away from the second water inlet/outlet 112, and the elastic member 22 is located between the sealing ring 21 and the limiting member 23. The stopper 23 is used to stop the other end of the elastic member 22, thereby facilitating the assembly of the seal ring 21 and the elastic member 22.

In the present embodiment, as shown in fig. 2 and fig. 3, the limiting member 23 includes a pressing cylinder 232 and a fixing sleeve 231, the fixing sleeve 231 is fixed on a side of the second chamber 12 away from the second water inlet/outlet 112, the elastic member 22 is disposed between the sealing ring 21 and the pressing cylinder 232, the fixing sleeve 231 is sleeved on an outer side of the pressing cylinder 232, the pressing cylinder 232 is used for pressing an outer side portion of the sealing ring 21, and the fixing sleeve 231 is used for fixing a position of the pressing cylinder 232. Specifically, the fixing sleeve 231 is in threaded connection with one side of the second chamber 12 far away from the second water inlet/outlet 112, and at this time, both the outer wall of the fixing sleeve 231 and one side of the second chamber 12 far away from the second water inlet/outlet 112 are provided with threads. One end of the fixed pressing cylinder 232 is an open end, the other end is a closed end, the open end is suitable for pressing the outer side portion of the sealing ring, the closed end is far away from the sealing ring, and the other end of the elastic member 22 abuts against the closed end. It will be appreciated that, as an alternative embodiment, the pressure tube 232 and the retaining sleeve 231 may be integrally formed as a single part, which may be referred to as a closure.

Specifically, the outer wall of the pressing cylinder 232 and the inner wall of the fixing sleeve 231 are both in a step shape with the outer diameter increasing from outside to inside, the pressing cylinder 232 can be fixed in the second cavity when the fixing sleeve 231 is fixed on the valve body, the pressing cylinder 232 does not need to be fixed on the valve body, and the fixing mode is simple and convenient.

In this embodiment, the first water inlet/outlet port 111 is adapted to communicate with a waste water port of the water treatment section, the third chamber 13 has a third water inlet/outlet port 131, and the third water inlet/outlet port 131 is adapted to communicate with a water inlet of the waste water valve, or the first water inlet/outlet port 111 communicates with a water inlet of the waste water valve, and the third water inlet/outlet port ZLSQ20228163

131 is suitable for being communicated with a waste water port of the water treatment part, and can realize the bidirectional sealing of the on-off valve.

In this embodiment, first cavity 11 includes the first water hole and the second water hole that are linked together, the extending direction in first water hole has the contained angle with the extending direction in second water hole, the one end that the second water hole was kept away from in first water hole forms first inlet outlet 111, the one end that the first water hole was kept away from in the second water hole forms second inlet outlet 112, the extending direction in third cavity 13 is the same with the extending direction in second water hole, the one end that first cavity 11 is close to second cavity 12 and the one end parallel arrangement that third cavity 13 is close to second cavity 12, set first cavity 11 into two water holes that are the contained angle, be convenient for be connected with other parts. Specifically, the first water hole and the second water hole are arranged vertically. It will be appreciated that as an alternative embodiment, the first chamber 11 comprises only the first water hole and no second water hole, the first water hole extending in the same direction as the third water hole.

It should be noted that the extending direction of the third chamber 13 is the water flow direction of the wastewater therein.

In this embodiment, as shown in fig. 2 and fig. 3, the on-off valve further includes a fourth chamber 14, the fourth chamber 14 is communicated with the third chamber 13, the fourth chamber 14 has a fourth water inlet and outlet 141, the fourth water inlet and outlet 141 is adapted to be connected to the raw water branch, and the fourth water inlet and outlet 141 can be used as a water inlet or a water outlet of the on-off valve. The part of the wastewater is drained to the raw water branch path through the fourth chamber 14, so that the wastewater is utilized, and the recovery rate of the wastewater is improved. It will be appreciated that the fourth chamber 14 may not be provided as an alternative embodiment.

Specifically, the extending direction of the fourth chamber 14 is perpendicular to the extending direction of the third chamber 13, the extending direction of the fourth chamber 14 is the same as the extending direction of the first water hole, and the fourth chamber 14 and the first chamber 11 are located on the same side of the third chamber 13, so that the on-off valve is compact in arrangement and small in occupied space. The fourth chamber 14 extends in the direction of the flow of wastewater therein. It will be appreciated that the fourth chamber 14 and the first chamber 11 are located on different sides of the third chamber 13.

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In this embodiment, the second chamber has an outer hole section 121, an inner hole section 122 and a water flow cavity which are sequentially arranged from outside to inside, the outer diameter of the outer hole section 121 is greater than the outer diameter of the inner hole section 122, a circular groove 124 is formed in a step surface connecting the outer hole section 121 and the inner hole section 122, the sealing ring comprises an outer ring body, an inner ring body and a bending body connecting the outer ring body and the inner ring body, the outer ring body is located in the circular groove 124, the inner ring body is matched with the hole wall of the inner hole section 122 and seals the second water inlet and outlet, a first convex portion is arranged on one side of the inner ring body facing the limiting member, a second convex portion is arranged on one side of the limiting member 23 facing the sealing ring, a sleeve of the spring is arranged on the first convex portion, and the other end of the spring is arranged on the second convex portion. The cross section of the bending body is U-shaped. It is to be understood that the first convex portion and the second convex portion may not be provided.

It should be noted that the water inlets and water outlets of the on-off valve can be designed into one or more than one, i.e. one inlet and one outlet, more inlets and one outlet, one inlet and more outlets, and are not limited to the above-mentioned one inlet and two outlets or two inlets and one outlet.

The present invention also provides a waste valve assembly comprising: the waste water valve and the on-off valve, wherein the water outlet of the on-off valve is connected with the water inlet of the waste water valve.

The present invention also provides a water purification apparatus, comprising: the waste valve assembly is described above.

In this embodiment, the water purification apparatus further includes a water treatment part and the like, and the water treatment part includes one or more of an RO membrane cartridge, an ultrafiltration membrane cartridge, a ceramic membrane cartridge, and a nanofiltration membrane cartridge. The waste water valve assembly comprises a waste water valve and an on-off valve, as shown in fig. 1 to 5, the on-off valve comprises a valve body 10, a sealing ring 21, a spring and the like, the valve body 10 is provided with a first cavity 11, a second cavity 12, a third cavity 13 and a fourth cavity 14, the third cavity 13 is communicated with the first cavity 11 through the second cavity 12, the third cavity 13 and the fourth cavity 14 are used as water outlet cavities, the first cavity 11 is used as a water inlet cavity, conversely, the third cavity 13 and the fourth cavity 14 can also be used as water inlet cavities, and the first cavity 11 is used as a water outlet cavity. A sealing ring 21, a spring and a limiting piece 23 are arranged in the second chamber 12, and the sealing ring, the spring and the limiting piece 23 are used as a seal ZLSQ20228163

An elastic part. The third chamber 13 is communicated with a water inlet of a waste water valve of the water purifying equipment, the fourth chamber 14 is communicated with a raw water branch of the water purifying equipment, and a waste water port of the RO filter element is communicated with the first chamber 11. The automatic sealing is realized through the water flow pressure change generated by the principle of the water purifying device, namely, the automatic sealing of the on-off valve is realized through the pressure change of the first chamber 11 or the third chamber 13.

The following describes the operation of the water purifying apparatus with reference to fig. 2 and 3:

when the water purifying device normally produces water (as shown in fig. 3), because the spring is designed with a certain elastic force, when the water flow pressure of the first cavity 11 is greater than the elastic force of the spring, the water flow pressure pushes the sealing ring 21 to move rightward by overcoming the elastic force of the spring, the pressing cylinder 232 is limited by the fixing sleeve 231, the sealing ring 21 moves rightward away from the water sealing surface at the second water inlet/outlet, so that automatic seal release is realized, water flows into the third cavity 13 through the water flow cavity 123, wastewater is discharged through the third cavity 13 and the fourth cavity 14, and the water purifying device normally produces water. The fourth chamber 14 is connected with the raw water branch, so that the utilization of waste water can be realized, and the recovery rate of the waste water is improved.

When the water purifying device stops producing water (as shown in fig. 2), the pressure of the water flow in the first chamber 11 is reduced, the sealing ring 21 is reset by the elastic force of the spring, and the sealing ring 21 moves leftwards, so that the dynamic sealing of the water flow cavity is realized.

The automatic sealing of on-off valve is realized to the change of chamber pressure that produces through the principle of water purification unit self, automatic deblocking when realizing making water, dynamic seal when not making water, it is sealed to guarantee that the second inlet outlet is sealed, waste water can not discharge through the waste water hole of next stage structure, the problem of just beginning not going out water when effectively solving the water intaking, a plurality of delivery ports of on-off valve can realize that partial waste water flows back to the raw water end simultaneously, realize waste water cyclic utilization, the rate of recovery promotes, the water economy resource.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

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1. the on-off valve comprises a valve body 10, a sealing ring 21, a spring, a limiting piece 23 and the like, wherein the valve body 10 is provided with a first cavity 11, a second cavity 12, a third cavity 13 and a fourth cavity 14, the third cavity 13 is communicated with the first cavity 11 through the second cavity 12, the sealing ring 21 is assembled on the second cavity 12, the limiting piece 23 is assembled at the tail end of the second cavity 12, the sealing ring 21 is tightly combined with the inner wall of the second cavity to ensure sealing, the spring is assembled between the sealing ring 21 and the limiting piece 23, the sealing ring 21 is sealed with the inner wall of the second cavity 12, the sealing ring 21 and a second water inlet/outlet 112 form dynamic sealing, the sealing ring 21 can move back and forth in the second cavity 12, the sealing ring 21 and the spring are fixed by the limiting piece 23 in the second cavity 12, the movement of the sealing ring 21 is adjusted through the change of the water flow pressure of the first cavity 11 or the third cavity 13 to realize the sealing and the conduction of the on-off valve, the on-off valve is low in cost and simple in structure, the problem that water cannot flow of water when the waste water is discharged from a waste water end and the pure water begins to be recycled can be effectively solved, the waste water recycling rate of the waste water can be improved, and the waste water can be recycled, and the two-recycling rate of the waste water can be improved.

2. The spring is assembled on the first convex part of the sealing ring 21 and the second convex part of the limiting part 23, two ends of the spring are respectively abutted to the sealing ring 21 and the limiting part 23, the sealing ring 21, the spring and the limiting part are coaxially arranged, the assembly is simple and convenient, the spring and the sealing ring can be effectively sealed with the first cavity and the third cavity, and the side face sealing is realized.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.

Claims (10)

1. An on-off valve, comprising:

a valve body (10) having a first chamber (11), a second chamber (12) and a third chamber (13), the second chamber (12) being in communication with the first chamber (11), the first chamber (11) having a first water inlet and outlet (111) and a second water inlet and outlet (112), the second chamber (12) being in communication with the second water inlet and outlet (112), the third chamber (13) being in communication with the second chamber (12);

a sealing spring (20) arranged in the second chamber (12) and adapted to provide a spring force sealing the second water inlet/outlet (112), the sealing spring (20) opening or sealing the second water inlet/outlet (112) by a change in water pressure in the first chamber (11).

2. The on-off valve according to claim 1, wherein the second chamber (12) extends toward a side of the first chamber (11) to a circumferential outer side of the first chamber (11) to form a water flow chamber (123), the third chamber (13) communicates with the water flow chamber (123), and the sealing elastic portion (20) opens or seals the second water inlet/outlet port (112) by a change in water pressure of the third chamber (13).

3. The on-off valve according to claim 1 or 2, characterized in that the sealing elastic portion (20) comprises:

a sealing ring (21) in sealing engagement with the inner wall of the second chamber (12);

one end of the elastic part (22) is matched with one side, away from the second water inlet and outlet (112), of the sealing ring (21), the other end of the elastic part (22) is fixed relative to the valve body (10), and the elastic part (22) provides elastic force for sealing the second water inlet and outlet (112) for the sealing ring (21).

4. The on-off valve according to claim 3, wherein the sealing elastic portion (20) further comprises a limiting member (23), the limiting member (23) is fixed on a side of the second chamber (12) far away from the second water inlet/outlet (112), and the elastic member (22) is located between the sealing ring (21) and the limiting member (23).

5. The on-off valve according to claim 4, wherein the retaining member (23) comprises a pressing cylinder (232) and a fixing sleeve (231), the fixing sleeve (231) is fixed on the side of the second chamber (12) far away from the second water inlet/outlet (112), the elastic member (22) is arranged between the sealing ring (21) and the pressing cylinder (232), and the fixing sleeve (231) is sleeved on the outer side of the pressing cylinder (232).

6. The on-off valve of claim 1 or 2, characterized in that the third chamber (13) has a third water inlet and outlet port (131), the first water inlet and outlet port (111) being adapted to communicate with a waste water port of a water treatment section, the third water inlet and outlet port (131) being adapted to communicate with a water inlet port of a waste water valve, or the first water inlet and outlet port (111) being adapted to communicate with a water inlet port of a waste water valve, the third water inlet and outlet port (131) being adapted to communicate with a waste water port of a water treatment section.

7. The on-off valve according to claim 1 or 2, wherein the first chamber (11) comprises a first water hole and a second water hole which are communicated with each other, an included angle is formed between the extending direction of the first water hole and the extending direction of the second water hole, one end of the first water hole, which is far away from the second water hole, forms the first water inlet/outlet (111), one end of the second water hole, which is far away from the first water hole, forms the second water inlet/outlet (112), and the extending direction of the third chamber (13) is the same as the extending direction of the second water hole.

8. The on-off valve according to claim 1 or 2, characterized in that it further comprises a fourth chamber (14), said fourth chamber (14) communicating with said third chamber (13), said fourth chamber (14) having a fourth water inlet and outlet (141), said fourth water inlet and outlet (141) being adapted to be connected with the raw water branch.

9. A waste valve assembly, comprising: a waste water valve and the on-off valve of any one of claims 1 to 8, the water outlet of the on-off valve being connected to the water inlet of the waste water valve.

10. A water purification apparatus, comprising: the wastewater valve assembly of claim 9.

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