CN111853245A

CN111853245A - Valve and control method thereof, and water filtering device and control method thereof

Info

Publication number: CN111853245A
Application number: CN201910332790.6A
Authority: CN
Inventors: 徐大明; 杨晓明; 陈小波
Original assignee: AO Smith China Water Heater Co Ltd; AO Smith China Environmental Products Co Ltd; Hangzhou Kambayashi Electronics Co Ltd
Current assignee: AO Smith China Water Heater Co Ltd; AO Smith China Environmental Products Co Ltd; Hangzhou Kambayashi Electronics Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-10-30

Abstract

The invention discloses a valve and a control method thereof, a water filtering device and a control method thereof, which relate to the technical field of control valves, wherein the valve comprises the following components: the shell is internally provided with a runner port; the separator can block the runner port, a back pressure cavity is formed between one side of the separator, which is far away from the runner port, and the shell, and a second opening is formed in the separator; a first opening communicating with the back pressure chamber; the transmission part can drive the isolating part to move, and the transmission part can plug the second opening; the valve has at least three states: in the first state, the transmission part blocks the second opening, and the isolating part blocks the runner port; in the second state, the second opening is in an open state, and the separator blocks the runner port; in the third state, the transmission part drives the isolation part to be separated from the runner opening. The method and the device can meet the requirements for various flows on the premise of low cost.

Description

Valve and control method thereof, and water filtering device and control method thereof

Technical Field

The invention relates to the technical field of control valves, in particular to a valve and a control method thereof, a water filtering device and a control method thereof.

Background

Along with the continuous upgrading of purifier system, in order to further improve filter unit's life, filter effect and avoid TDS rising scheduling problem in the purifier, not only need set up a valve that has waste water ratio function in filter unit's waste water end, still need can control the disconnection and the opening of filter unit waste water end. Therefore, in the prior art, two solenoid valves are usually connected in parallel or in series to achieve the three functions, or the two solenoid valves may be integrated into a valve, in which although the latter seems to use a valve, the internal principle of the valve is basically similar to that of the two solenoid valves connected in parallel or in series, for example, two independent coil mechanisms are required to achieve the three functions.

No matter the mode that two electromagnetic valves are connected in parallel or in series or the mode that the two electromagnetic valves are integrated on one valve is adopted, the two electromagnetic valves have the disadvantages of high cost, large size and the like.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, embodiments of the present invention provide a valve and a control method thereof, a water filtering device and a control method thereof, which can meet the requirements for various flow rates at low cost.

The specific technical scheme of the embodiment of the invention is as follows:

a valve, comprising:

a housing having a runner port therein; the isolating piece can block the runner port, a back pressure cavity is formed between one side of the isolating piece, which is far away from the runner port, and the shell, and a second opening is formed in the isolating piece; a first opening communicating with the back pressure chamber; the transmission part can drive the isolating part to move, and the transmission part can plug the second opening;

the valve has at least three states: in a first state, the transmission part blocks the second opening, and the isolating part blocks the runner port;

in a second state, the second opening is in an open state, and the separator blocks the runner port;

in a third state, the transmission part drives the isolation part to be separated from the runner port.

Preferably, the housing has an inlet and an outlet, the first opening being in communication with the inlet and the second opening being in communication with the outlet; the area of the first opening is larger than that of the second opening.

Preferably, the first opening is located on the spacer.

Preferably, the transmission member and the isolation member can slide relatively to each other to have at least two positions, and in a first position, the transmission member presses the second opening of the isolation member; and under the second position, the transmission piece is separated from the second opening of the isolating piece, and the transmission piece can drive the isolating piece to move in the direction away from the runner port.

Preferably, the side of the isolating piece, which is far away from the runner port, is provided with a convex part extending along the axial direction of the transmission piece, and a sliding groove is formed in the convex part; the transmission part is provided with a linkage part which is arranged in the sliding groove and can move in the sliding groove.

Preferably, the second opening is located below the interlocking part, and when the interlocking part moves towards the partition, the interlocking part can block the second opening.

Preferably, the side of the linkage part, which faces away from the runner port, is provided with a force bearing surface, and the force bearing surface can bear the pressure of the fluid in the back pressure cavity towards the isolation part.

Preferably, the transmission member is a core made of a ferromagnetic substance, and the valve further includes: a coil mechanism for controlling movement of the core.

Preferably, when the coil mechanism is energized, the coil mechanism is capable of driving the core to move away from the sprue gate.

Preferably, when the coil mechanism is de-energised, the valve is in a first state; the transmission member and the spacer are in a first position.

Preferably, when the coil mechanism is energized, in the second state of the valve, the force of the coil mechanism driving the core to move away from the flow port opening is less than the difference between the pressure of the fluid in the back pressure chamber acting on the partition and the pressure of the fluid at the housing inlet acting on the partition.

Preferably, when the coil mechanism is energized, in the third state of the valve, the force of the coil mechanism driving the core to move away from the flow port opening is greater than the difference between the pressure of the fluid in the back pressure chamber acting on the partition and the pressure of the fluid at the housing inlet acting on the partition.

Preferably, when the valve is in the second state, the coil mechanism is in the energized state, and the transmission member and the partition are in the second position; the inlet of the valve is in communication with a fluid under pressure.

Preferably, when the valve is in the third state, the coil mechanism is in the energized state, and when the transmission member and the partition member are in the second position, the transmission member drives the partition member to separate from the runner port.

Preferably, an absorption aid made of ferromagnetic material and fixed with the coil mechanism is arranged above the core body.

Preferably, a sealing membrane is arranged on the isolating piece and is used for abutting against the flow passage opening.

Preferably, in the second state, the inlet of the housing is communicated with the outlet of the housing through the first opening and the second opening.

Preferably, an annular groove is formed in the housing in the circumferential direction of the runner port, the annular groove is communicated with the inlet of the housing, and in a third state, the inlet of the housing is communicated with the runner port through the annular groove.

Preferably, when the coil mechanism is energized, the coil mechanism has at least two output powers, and at the first output power, the force of the coil mechanism driving the core to move away from the flow passage port is smaller than the difference between the pressure of the fluid in the back pressure chamber acting on the partition in the second state of the valve and the pressure of the fluid at the inlet of the housing acting on the partition; under the second output power, the acting force of the coil mechanism driving the core body to move in the direction away from the flow passage opening is larger than the difference between the pressure of the fluid in the back pressure cavity acting on the isolating piece and the pressure of the fluid at the inlet of the shell body acting on the isolating piece under the second state of the valve.

A water filtration device, comprising: a filtration unit; a valve as claimed in any preceding claim, the inlet of the valve being in communication with the waste water port of the filtration unit.

Preferably, the water filtering apparatus further comprises: and the booster pump is communicated with the raw water inlet of the filtering unit.

A method of controlling a valve according to any preceding claim, the method comprising:

when the valve needs to be closed, pressurizing the back pressure cavity, and plugging the second opening by using the transmission piece so as to enable the valve to enter the first state;

when the valve needs to be adjusted to a first preset flow, the flow passage opening is blocked through the isolating piece, and the back pressure cavity is pressurized; after the back pressure cavity is pressurized, the transmission piece is moved away from the second opening, so that the valve enters the second state;

when the valve needs to be adjusted to a second preset flow, the transmission piece drives the isolating piece to be separated from the runner opening, so that the valve enters the third state.

Preferably, the transmission member is a core made of a ferromagnetic substance, and the valve further includes: a coil mechanism for controlling movement of the core;

When the transmission part is used for plugging the second opening, the coil mechanism is powered off;

and when the transmission piece is moved away from the second opening or the transmission piece drives the isolating piece to be separated from the runner opening, the coil mechanism is electrified.

Preferably, the first opening is in communication with a source of water under pressure to pressurise the back pressure chamber.

Preferably, the first preset flow rate is smaller than the second preset flow rate.

Preferably, when the valve needs to be switched from a first preset flow to a second preset flow, the pressure of the back pressure cavity is restored, so that the transmission piece drives the isolating piece to be separated from the runner port;

when the valve needs to be switched from a second preset flow to a first preset flow, the pressure of the back pressure cavity is recovered, the isolating piece is used for plugging the flow passage opening, the transmission piece is used for plugging the second opening, and then the back pressure cavity is pressurized; and after the back pressure cavity is pressurized, the transmission piece is moved away from the second opening, so that the valve enters the second state.

A method of controlling a water filtration apparatus according to any one of the preceding claims, the method comprising:

When the water filtering device is used for water production, the flow passage opening is plugged through the isolating piece, and the back pressure cavity is pressurized; after the back pressure cavity is pressurized, the transmission piece is moved away from the second opening, so that the valve enters the second state;

when the filtering device needs to wash the filtering unit, the transmission piece drives the isolating piece to be separated from the runner opening, so that the valve enters the third state.

Preferably, the control method further includes: when the filtering device needs to disconnect the waste water port of the filtering unit, the back pressure cavity is pressurized, and the transmission piece is used for plugging the second opening hole, so that the valve enters the first state.

Preferably, the water filtering apparatus further comprises: a booster pump communicated with the raw water inlet of the filtering unit;

when the filtering device needs to flush the filtering unit, the valve is switched to a third state, and then the booster pump is started;

when the filtering device produces water, the flow passage opening is blocked by the isolating piece, and the booster pump is started; after the booster pump is started, the transmission piece is moved away from the second opening hole, so that the valve enters the second state;

Preferably, when the filtering device needs to disconnect the waste water port of the filtering unit, the booster pump is started to pressurize the back pressure cavity.

when the filtering device needs to wash the filtering unit, the coil mechanism is electrified so that the transmission piece drives the isolating piece to be separated from the runner port;

when the filter device produces water, after the booster pump is started, the coil mechanism is electrified so as to move the transmission piece away from the second opening;

preferably, when the filtering device needs to disconnect the waste water port of the filtering unit, the coil mechanism is powered off so that the transmission member blocks the second opening hole.

The technical scheme of the invention has the following remarkable beneficial effects:

because first default and second default can set to different, consequently, the valve in this application can satisfy different fluid flow's requirement, simultaneously, only need control driving medium and backpressure chamber's pressure alright with make the valve switch or change under different states, so can make the structure of whole valve more retrench, and be convenient for switch control, and then make the manufacturing cost of this valve reduce by a wide margin.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.

FIG. 1 is a cross-sectional view of a valve according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a valve in a first state according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a valve in a second state according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the valve in the third state according to the embodiment of the present invention.

Reference numerals of the above figures:

1. a housing; 11. an inlet; 12. an outlet; 13. an annular groove; 2. a runner port; 3. a spacer; 31. a second opening; 32. a boss portion; 33. a chute; 4. a back pressure chamber; 5. a first opening; 6. a transmission member; 61. a linking part; 7. a coil mechanism; 8. an absorption aid; 9. the diaphragm is sealed.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to meet the requirements for various flows at low cost, a valve is proposed in the present application, fig. 1 is a cross-sectional view of the valve in an embodiment of the present invention, fig. 2 is a schematic structural view of the valve in a first state in the embodiment of the present invention, fig. 3 is a schematic structural view of the valve in a second state in the embodiment of the present invention, fig. 4 is a schematic structural view of the valve in a third state in the embodiment of the present invention, and as shown in fig. 1 to 4, the valve may include: the device comprises a shell 1, wherein a runner port 2 is arranged in the shell 1; the isolation piece 3 can block the runner port 2, a back pressure cavity 4 is formed between one side of the isolation piece 3, which is far away from the runner port 2, and the shell 1, and a second opening 31 is formed in the isolation piece 3; a first opening 5 communicating with the back pressure chamber 4; the transmission piece 6 can drive the isolating piece 3 to move, and the transmission piece 6 can block the second opening 31; the valve has at least three states: in the first state, the transmission piece 6 blocks the second opening 31, and the partition piece 3 blocks the runner port 2; in the second state, the second opening 31 is in the open state, and the separator 3 blocks the runner port 2; in the third state, the transmission member 6 drives the isolation member 3 to separate from the runner port 2.

The control method of the valve in the embodiment of the application can be as follows: when the valve needs to be disconnected, as shown in fig. 2, the second opening 31 is blocked by the transmission member 6, and the back pressure chamber 4 is pressurized, for example, the first opening 5 may be communicated with a water source having pressure to pressurize the back pressure chamber 4, so that the partition member 3 blocks the flow passage opening 2 under the pressure of the back pressure chamber 4, and the whole valve enters the first state, i.e., the disconnected state. When the valve needs to be adjusted to a first preset amount, as shown in fig. 3, the flow passage port 2 can be blocked by the partition 3, and the back pressure chamber 4 is pressurized; after the back pressure chamber 4 is pressurized, the transmission member 6 is removed from the second opening 31 to bring the valve into the second state. In the second state the first opening 5 in the valve is in communication with the second opening 31 and fluid passing through the valve exits through the first opening 5 and the second opening 31, thereby controlling the flow of fluid through the valve at the first predetermined level in the manner described above. When the valve needs to be adjusted to the second preset amount, as shown in fig. 4, the transmission member 6 drives the isolation member 3 to separate from the channel opening 2, and at this time, the fluid flowing into the valve directly passes through the channel opening 2, so that the valve enters the third state, and the fluid flowing through the valve is controlled to be in the second preset amount by this way.

Generally, the second predetermined flow rate of the fluid when the partition 3 is separated from the flow port 2 in the third state of the valve is greater than the first predetermined flow rate of the fluid in the second state of the valve. Of course, when the first opening 5 and the second opening 31 are large and the gap formed by the separation part 3 separating from the flow port 2 is small, the second preset flow rate of the fluid when the separation part 3 separates from the flow port 2 in the third state of the valve can also be smaller than the first preset flow rate of the fluid in the second state of the valve.

Because first preset volume and second preset volume can set to different, consequently, this valve can satisfy different fluid flow's requirement, simultaneously, only need control driving medium 6 and the pressure of backpressure chamber 4 alright make the valve switch or change under different states, so can make the structure of whole valve more retrench, and be convenient for switch control, and then make the manufacturing cost of this valve reduce by a wide margin.

In order to better understand the valve of the present application, it will be further explained and illustrated below. As shown in fig. 1, the housing 1 of the valve may have an inlet 11 for fluid to flow into and an outlet 12 for fluid to flow out. The casing 1 is formed inside with a flow port 2, and the flow port 2 can communicate with an inlet 11 of the casing 1 and an outlet 12 of the casing 1. The flow port 2 is provided with a partition 3 capable of blocking the flow port 2, and the partition 3 can make the flow port 2 in an open or closed state. A back pressure cavity 4 is formed between one side of the separator 3 departing from the flow passage port 2 and the shell 1, a second opening 31 is arranged on the separator 3, and the second opening 31 can be communicated with the outlet 12 of the shell 1 and the back pressure cavity 4. The valve has a first state in which the transmission member 6 blocks the second opening 31 and the partition member 3 blocks the port opening 2.

In one possible embodiment, as shown in fig. 1 to 4, a sealing diaphragm 9 can be arranged on the partition 3, the sealing diaphragm 9 being intended to be placed against the flow opening 2. The sealing diaphragm 9 may be provided at the edge of the partition 3, which may improve the sealing between the partition 3 and the flow-gate 2.

In the valve there is a first opening 5, which first opening 5 communicates with the back pressure chamber 4, while the first opening 5 can communicate with the inlet 11 of the housing 1. When the partition 3 blocks the port 2, fluid passing through the valve can enter the back pressure chamber 4 through the first opening 5 and then exit the outlet 12 of the housing 1 through the second opening 31 of the back pressure chamber 4. The first opening 5 may be located on the partition 3 and the first opening 5 may also be located in the housing 1.

In order to be able to control the blocking of the flow opening 2 by the partition 3 by the pressure of the fluid entering the back pressure chamber 4, the area of the first opening 5 is therefore greater than the area of the second opening 31. The amount of fluid flowing into the back pressure chamber 4 through the first opening 5 is equal to or greater than the amount of fluid flowing out of the back pressure chamber 4 through the second opening 31, so that the pressurized chamber is in a pressurized state, and the pressure of the fluid acting on the partition 3 can make the partition 3 block the flow passage port 2.

The transmission piece 6 and the isolation piece 3 in the valve have certain linkage, and the transmission piece 6 and the isolation piece 3 can be driven to move, so that the transmission piece 6 can block the second opening 31, the transmission piece 6 can be separated from the second opening 31, and the second opening 31 is opened. In a possible embodiment, as shown in fig. 1 to 4, the transmission member 6 and the partition 3 can slide relative to each other to have at least two positions, in a first position, the transmission member 6 presses against the second opening 31 of the partition 3; in the second position, the transmission member 6 is disengaged from the second opening 31 of the isolation member 3, and the transmission member 6 can drive the isolation member 3 to move away from the runner opening 2. For example, the partition 3 has a protrusion 32 extending along the axial direction of the transmission member 6 on the side away from the runner port 2, and a sliding groove 33 is formed in the protrusion 32; the transmission member 6 has an interlocking portion 61, and the interlocking portion 61 is disposed in the slide groove 33 and movable in the slide groove 33. When the linkage portion 61 moves in the sliding slot 33 in a direction away from the partition 3, the transmission member 6 and the partition 3 are at the second position, and the transmission member 6 is separated from the second opening 31 of the partition 3; the second opening 31 is located below the linking portion 61, and after the linking portion 61 moves toward the spacer 3 in the sliding slot 33, the driving member 6 and the spacer 3 are in the first position, and the linking portion 61 of the driving member 6 blocks the second opening 31 of the spacer 3.

As shown in fig. 3, when the transmission member 6 and the partition member 3 are in the second position, the transmission member 6 is separated from the second opening 31 of the partition member 3, and the partition member 3 blocks the flow passage opening 2, the valve is in the second state. When the valve is in the second state, the inlet 11 of the housing 1 is communicated with the outlet 12 of the housing 1 through the first opening 5 and the second opening 31, and the fluid flowing from the inlet 11 of the valve passes through the first opening 5, then passes through the second opening 31 of the partition 3, and finally flows out of the outlet 12 of the housing 1. As shown in fig. 1, when the driving member 6 and the isolating member 3 are in the second position, the driving member 6 is separated from the second opening 31 of the isolating member 3, and simultaneously, when the driving member 6 drives the isolating member 3 to be separated from the flow passage opening 2, the valve is in the third state. When the valve is in the third state, fluid flowing in from the inlet 11 of the valve passes through the annular groove 13, then passes through the flow passage port 2, and finally flows out from the outlet 12 of the shell 1.

As shown in fig. 2, the side of the linkage portion 61 opposite to the flow passage port 2 may have a force-bearing surface, and the force-bearing surface can be pressed by the fluid in the back pressure chamber 4 toward the partition 3, so that the linkage portion 61 of the transmission member 6 keeps a state of blocking the second opening 31 of the partition 3, and the valve is kept in the first state.

In a possible embodiment, the transmission member 6 may be a core made of ferromagnetic material, and the valve further comprises: and the coil mechanism 7 is used for controlling the movement of the core body 7. Specifically, the coil mechanism 7 is sleeved outside the core body, and when the transmission member 6 is removed from the second opening 31 or the transmission member 6 drives the isolation member 3 to be separated from the runner port 2, the coil mechanism 7 is powered on. When the coil mechanism 7 is energized as shown in fig. 3 to 4, the coil mechanism 7 can drive the core to move in a direction away from the runner port 2. At this time, the valve may be in the second state or the third state, when the valve is in the second state, the transmission member 6 and the partition member 3 are in the second position, because the second opening 31 is in the open state, the partition member 3 blocks the flow port opening 2, the inlet 11 of the valve is communicated with the fluid with pressure, so that the fluid flowing into the back pressure chamber 4 makes the back pressure chamber 4 in the pressure charging state, the pressure of the fluid acting on the partition member 3 is relatively high, which can make the partition member 3 block the flow port opening 2, the acting force of the coil mechanism 7 driving the core body to move in the direction away from the flow port opening 2 is smaller than the difference between the pressure of the fluid acting on the partition member 3 in the back pressure chamber 4 and the pressure of the fluid acting on the partition member 3 at the inlet 11 of the housing 1, and the partition member 3 cannot move upward under the driving of the core body. As shown in fig. 4, when the valve is in the third state, the transmission member 6 and the partition member 3 are in the second position, since the second opening 31 is in the open state, the transmission member 6 drives the partition member 3 to separate from the flow passage opening 2, the fluid flowing into the valve body directly flows out through the flow passage opening 2, the back pressure chamber 4 is not in the pressurized state, the downward pressure of the fluid acting on the partition member 3 in the back pressure chamber 4 is small or almost zero, the upward force of the coil mechanism 7 driving the core body is greater than the difference between the pressure of the fluid acting on the partition member 3 in the back pressure chamber 4 and the pressure of the fluid acting on the partition member 3 at the inlet 11 of the housing 1, and therefore, the partition member 3 is kept in the second position by the core body, and the partition member 3 is always kept separating from the flow passage opening 2.

As shown in fig. 2, the coil arrangement 7 is de-energized when the second opening 31 is closed off by the transmission element 6. When the coil mechanism 7 is de-energized, the valve is in a first state, i.e. the open state, and the transmission member 6 and the partition member 3 are in a first position, i.e. the transmission member 6 is pressed against the second opening 31 of the partition member 3.

When the valve needs to be switched from the first preset flow to the second preset flow, the pressure of the back pressure cavity 4 is recovered, so that the transmission piece 6 drives the isolation piece 3 to be separated from the runner port 2. Specifically, when the valve is under the first preset flow, coil mechanism 7 is in the on-state, when needing to switch over, with valve import 11 with have the pressure water source disconnection or reduce the pressure of water source to with the pressure recovery reduction in backpressure chamber 4, so, coil mechanism 7 can drive the core rebound and make isolator 3 break away from runner opening 2, again with valve import 11 with have the pressure water source intercommunication or improve water source pressure and guarantee rivers and pass through the valve, later the valve is under the second preset flow.

When the valve needs to be switched from the second preset flow to the first preset flow, the pressure of the back pressure cavity 4 is recovered, the isolating piece 3 blocks the flow passage port 2, the transmission piece 6 blocks the second opening 31, and then the back pressure cavity 4 is pressurized; after the back pressure chamber 4 is pressurized, the transmission member 6 is removed from the second opening 31 to bring the valve into the second state. Specifically, when the valve is at the first preset flow rate, the coil mechanism 7 is in the energized state, and the separator 3 is separated from the flow port 2. When needs switch over, with valve import 11 with the water source disconnection or the pressure that reduces the water source of having pressure to with the pressure recovery reduction in backpressure chamber 4, cut off power supply to coil mechanism 7, thereby make 3 of barrier member to the flow crossing 2 shutoff, driving medium 6 carries out the shutoff to second trompil 31. Then the inlet 11 of the valve is communicated with a water source with pressure or the pressure of the water source is increased to ensure that water flows through the valve, so that the back pressure cavity 4 is pressurized; after the back pressure chamber 4 is pressurized, the coil mechanism 7 is energized, and the coil mechanism 7 drives the transmission member 6 to move away from the second opening 31, so that the valve enters the second state.

In one possible embodiment, the coil arrangement 7 has at least two output powers when the coil arrangement 7 is energized. Under the first output power, the acting force of the coil mechanism 7 driving the core to move in the direction away from the flow passage port 2 is smaller than the difference between the pressure of the fluid in the back pressure cavity 4 acting on the isolating piece 3 under the second state of the valve and the pressure of the fluid acting on the isolating piece 3 at the inlet 11 of the shell 1. At this time, the coil mechanism 7 can drive the core to move to the direction away from the flow port opening 2 until the position between the transmission member 6 and the partition member 3 is at the second position, and meanwhile, the partition member 3 blocks the flow port opening 2, so that the valve is in the second state. At the second output power, the acting force of the coil mechanism 7 driving the core to move away from the flow passage port 2 is larger than the difference between the pressure of the fluid in the back pressure cavity 4 acting on the isolating piece 3 in the second state of the valve and the pressure of the fluid acting on the isolating piece 3 at the inlet 11 of the shell 1. At this time, the coil mechanism 7 can drive the core to move to the direction away from the runner port 2 until the position between the transmission member 6 and the partition member 3 is at the second position, and meanwhile, the transmission member 6 drives the partition member 3 to separate from the runner port 2, so that the valve is in the third state.

In one possible embodiment, as shown in fig. 1 to 4, in order to increase the force acting on the core body to move upward when the coil mechanism 7 is in the energized state, a suction aid 8 made of ferromagnetic material is provided above the core body and fixed to the coil mechanism 7. In this way, the size of the coil mechanism 7 or the current applied to the coil mechanism 7 can be reduced on the premise of generating the same acting force.

In this application, there is also provided a water filtering device including: a filtration unit; in any of the above-described valves, the inlet 11 of the valve is in communication with the waste water port of the filter unit. The valve can realize the closing function, the waste water ratio function and the opening function under the condition of large flow at the waste water outlet of the filtering unit. Under the large-traffic function of opening, the valve is in the third state, and at this moment, the water filtering device can realize washing to filter element, and during the washing, the water under washing is directly discharged from the waste water mouth. When the valve realizes the function of wastewater ratio at the wastewater outlet of the filtering unit, the valve is in the second state. When the valve performs a closing function at the waste water port of the filter unit, the valve is in a first state.

The control method of the water filtering device comprises the following steps: when the water filtering device is used for making water, the flow passage opening 2 is plugged through the isolating piece 3, and the booster pump is started to boost the back pressure cavity 4; after the back pressure chamber 4 is pressurized, the coil mechanism 7 is energized to move the transmission member 6 away from the second opening 31, so that the valve enters the second state. When the filtering device needs to flush the filtering unit, the transmission piece 6 drives the isolating piece 3 to be separated from the flow passage opening 2, so that the valve enters a third state, the booster pump is started again to drive fluid to enter the filtering unit for flushing, and the flushed fluid is discharged from the valve through a waste water opening of the filtering unit. When the filtering device needs to disconnect the waste water port of the filtering unit, the booster pump is started to boost the back pressure cavity 4, the coil mechanism 7 is powered off, and the transmission piece 6 blocks the second opening 31, so that the valve enters the first state. In addition, the valve in the application can also be installed in other household appliances, especially the appliances requiring two different flow requirements for the introduced fluid (water flow). For example, the washing machine can adopt two different flow rates when water enters the washing machine, the water entering the washing machine is small when the valve is in the second state, the part of water needs to flow through the box for storing the laundry detergent to flush the laundry detergent into the machine barrel, and then the water entering the washing machine is large when the valve is in the third state, and the water directly flows into the machine barrel at a large flow rate. After the water in the barrel reaches a certain level, the valve is in a first, closed state.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A valve, comprising:

2. The valve of claim 1, wherein said housing has an inlet and an outlet, said first opening communicating with said inlet and said second opening communicating with said outlet; the area of the first opening is larger than that of the second opening.

3. The valve of claim 1, wherein the first opening is located in the spacer.

4. The valve of claim 1, wherein the actuator and the spacer are slidable relative to each other to have at least two positions, a first position in which the actuator presses against the second opening of the spacer; and under the second position, the transmission piece is separated from the second opening of the isolating piece, and the transmission piece can drive the isolating piece to move in the direction away from the runner port.

5. The valve according to claim 4, wherein the partition has a protrusion extending in the axial direction of the transmission member on a side facing away from the port opening, the protrusion having a sliding groove therein; the transmission part is provided with a linkage part which is arranged in the sliding groove and can move in the sliding groove.

6. The valve according to claim 5, wherein the second opening is located below the interlocking portion, and when the interlocking portion moves toward the partition, the interlocking portion can block the second opening.

7. The valve of claim 5, wherein a side of the linkage facing away from the port opening has a force-bearing surface that is capable of being pressurized by fluid in the back pressure chamber toward the barrier.

8. The valve of claim 4, wherein the transmission member is a core made of a ferromagnetic material, the valve further comprising: a coil mechanism for controlling movement of the core.

9. The valve of claim 8, wherein the coil mechanism is capable of driving the core in a direction away from the flow port opening when the coil mechanism is energized.

10. The valve of claim 8, wherein when the coil mechanism is de-energized, the valve is in a first state; the transmission member and the spacer are in a first position.

11. The valve of claim 8 wherein when said coil mechanism is energized, in said second state of said valve, said coil mechanism forces said core to move away from said orifice opening by a force less than the difference between the pressure of fluid in said back pressure chamber acting on said barrier and the pressure of fluid at said housing inlet acting on said barrier.

12. The valve of claim 8 wherein when said coil mechanism is energized, in said third state of said valve, said coil mechanism applies a force to move said core away from said port opening that is greater than the difference between the pressure of fluid in said back pressure chamber acting on said barrier and the pressure of fluid at said housing inlet acting on said barrier.

13. The valve of claim 11, wherein when the valve is in the second state, the coil mechanism is in the energized state and the drive member and the spacer are in the second position; the inlet of the valve is in communication with a fluid under pressure.

14. The valve of claim 11, wherein when the valve is in the third state, the coil mechanism is in the energized state, and the transmission member and the spacer member are in the second position, the transmission member moving the spacer member away from the port opening.

15. The valve according to claim 8, wherein a suction aid made of ferromagnetic material is fixed to the coil mechanism above the core.

16. The valve of claim 1, wherein a sealing diaphragm is disposed on the barrier member, the sealing diaphragm being adapted to abut the flow port opening.

17. The valve of claim 1, wherein in the second state, the inlet of the housing communicates with the outlet of the housing through the first opening and the second opening.

18. The valve according to claim 1, wherein an annular groove is formed in the housing in a circumferential direction of the flow passage port, the annular groove communicating with the inlet of the housing, and in the third state, the inlet of the housing communicates with the flow passage port through the annular groove.

19. The valve of claim 8 wherein when said coil mechanism is energized, said coil mechanism has at least two outputs, and wherein at a first output, the force of said coil mechanism urging said core in a direction away from said port opening is less than the difference between the pressure of fluid in said back pressure chamber acting on said spacer in said second state of the valve and the pressure of fluid at said housing inlet acting on said spacer; under the second output power, the acting force of the coil mechanism driving the core body to move in the direction away from the flow passage opening is larger than the difference between the pressure of the fluid in the back pressure cavity acting on the isolating piece and the pressure of the fluid at the inlet of the shell body acting on the isolating piece under the second state of the valve.

20. A water filtering device, comprising: a filtration unit; a valve as claimed in any one of claims 1 to 19, the inlet of the valve being in communication with the waste water port of the filtration unit.

21. The filtered water device of claim 20, further comprising: and the booster pump is communicated with the raw water inlet of the filtering unit.

22. A method of controlling a valve according to any one of claims 1 to 19, the method comprising:

23. The control method of claim 22, wherein the transmission member is a core made of a ferromagnetic substance, and the valve further comprises: a coil mechanism for controlling movement of the core;

24. The control method of claim 22, wherein the first opening is in communication with a source of water under pressure to pressurize the back pressure chamber.

25. The control method according to claim 22, characterized in that the first preset flow rate is smaller than the second preset flow rate.

26. The control method of claim 22, wherein when the valve needs to be switched from a first preset flow rate to a second preset flow rate, the pressure of the back pressure chamber is restored, so that the transmission member drives the partition member to be separated from the flow passage port;

27. A method of controlling a water filtering apparatus according to any one of claims 20 to 21, wherein the method of controlling comprises:

28. The method of controlling a water filtering apparatus according to claim 27, further comprising: when the filtering device needs to disconnect the waste water port of the filtering unit, the back pressure cavity is pressurized, and the transmission piece is used for plugging the second opening hole, so that the valve enters the first state.

29. The method of controlling a water filtering apparatus according to claim 28, wherein the water filtering apparatus further comprises: a booster pump communicated with the raw water inlet of the filtering unit;

30. The method of controlling a water filtration device of claim 28 wherein the transmission member is a core made of a ferromagnetic material, the valve further comprising: a coil mechanism for controlling movement of the core;