CN108758012B

CN108758012B - Valve and hot water system thereof

Info

Publication number: CN108758012B
Application number: CN201810975056.7A
Authority: CN
Inventors: 徐赛锋; 徐安达
Original assignee: AO Smith China Water Heater Co Ltd
Current assignee: AO Smith China Water Heater Co Ltd
Priority date: 2018-08-24
Filing date: 2018-08-24
Publication date: 2023-07-18
Anticipated expiration: 2038-08-24
Also published as: CN108758012A

Abstract

The application discloses a valve and a hot water system thereof, wherein the valve is provided with a first opening part and a second opening part, and a one-way valve arranged between the first opening part and the second opening part; when the one-way valve is opened, allowing the first liquid input by the first opening part to flow to the second opening part; the valve is provided with a third opening; the third opening part is used for outputting the second liquid input by the second opening part; wherein the valve is further provided with a valve core assembly located downstream of the one-way valve; the valve core component is communicated with the one-way valve and the second opening part when the one-way valve is opened; the valve element assembly reduces an area of excess flow between the check valve and the second opening when the second liquid is input into the second opening. The valve can effectively avoid outputting hot water when a user uses cold water, and improve water use experience.

Description

Valve and hot water system thereof

Technical Field

The application relates to the field of valves, in particular to a valve and a hot water system thereof.

Background

When the existing water heater is used, a user needs to put a section of cold water before using hot water each time, especially in winter with low air temperature, tap water is enabled to flow away, a lot of time is delayed, and the use experience is greatly affected. This is a major difficulty in use that is common to the water heater industry.

In order to solve the problem, a preheating circulation water return valve is arranged between a hot water outlet pipe and a cold water pipe of a water heater in the prior art, a preheating circulation pipeline is established between a water consumption point and the water heater in a mode that the cold water pipe is used as a water return pipe, and low-temperature water is conveyed into the water heater for heating through the preheating circulation pipeline in a non-water consumption state until the water temperature in the circulation pipeline is kept at a set water temperature.

The existing water return valve is easy to cause the following problems in the use process:

1. when the household water pressure of a user is relatively high or the water resistance of a hot water pipeline is relatively low, the existing water return valve is easy to open by mistake when the user opens cold water, so that the problem of hot water output is caused, and the use experience of the user is affected.

2. To avoid false opening of the water return valve when a user turns on the cold water, the water return valve may be provided with a flow restriction structure (commonly referred to as "water restriction") at the cold water outlet to reduce the cold water outlet flow. However, this tends to result in a relatively small flow rate of cold water to the user, sometimes even less than 4L/min, which has a large adverse effect on the user's water use experience.

3. Even if the cold water outlet of the water return valve is provided with a water limiting structure, when the household water pressure of a user is large or the water resistance of the hot water pipeline is small, the problem of false opening also exists.

Disclosure of Invention

The inventor researches and experiments for a long time show that when a user opens cold water, the water pressure on the side of the water return valve connected with the cold water pipeline is instantaneously reduced due to the entrainment effect, and the water pressure on the side of the water return valve connected with the hot water pipe is basically unchanged. At this time, a pressure difference occurs at both sides of the valve core of the water return valve, and when the pressure difference reaches the opening pressure difference of the valve core, the water return valve is opened to generate leakage. When the flow reaches the flow for starting the preheating cycle, the gas water heating device can be started by mistake.

The "water limitation" is added to the cold water outlet, so that the pressure difference of the instant valve opening can be reduced, but the flow of the cold water outlet can be reduced, and the user experience is poor. Because the aperture of the 'water limiting' structure is fixed, when the household water pressure of a user is large or the water resistance of a hot water pipeline is small, the pressure difference reaching the valve opening is still possible, so that the problem of false opening is also caused, and the hot water is output when the user uses cold water.

In view of the deficiencies of the prior art, it is an object of the present application to provide a valve and a hot water system thereof that are capable of solving at least one of the above problems.

The technical scheme of the application is as follows:

a valve having a first opening portion and a second opening portion, and a one-way valve disposed between the first opening portion and the second opening portion; when the one-way valve is opened, allowing the first liquid input by the first opening part to flow to the second opening part;

The valve is provided with a third opening; the third opening part is used for outputting the second liquid input by the second opening part; wherein,,

the valve is also provided with a valve core assembly positioned downstream of the one-way valve; the valve core component is communicated with the one-way valve and the second opening part when the one-way valve is opened; the valve element assembly reduces an area of excess flow between the check valve and the second opening when the second liquid is input into the second opening.

As a preferred embodiment, the valve element assembly is further configured to communicate the second opening portion and the third opening portion when reducing an area of the flow passage between the check valve and the second opening portion, and to reduce an area of the flow passage between the second opening portion and the third opening portion when communicating the check valve and the second opening portion.

A valve having a first opening, a second opening and a third opening; the valve is provided with a valve core assembly; the valve core assembly has a first state and a second state;

the valve element assembly communicates the first opening portion and the second opening portion and reduces an overflow area between the second opening portion and the third opening portion in the first state;

The valve element assembly communicates the second opening portion and the third opening portion in the second state, and reduces an area of the flow passage between the first opening portion and the second opening portion;

the valve core assembly can be switched from a first state to a second state under the drive of the second liquid when the second liquid is input into the second opening, so that the second liquid is output from the third opening part; the valve element assembly is resettable from the second state to the first state when the second fluid is not input to the second opening.

As a preferred embodiment, the first opening is used for communicating with a water outlet of the water heater; the second opening part is used for communicating a cold water pipeline; the third opening part is used for communicating a cold water inlet of the water end;

when in a preheating circulation state, the valve core assembly is positioned in the first state; when the water end outputs cold water, the valve core assembly is in the second state.

As a preferred embodiment, a check valve is further provided between the first opening and the second opening; the check valve is located upstream of the spool assembly.

As a preferred embodiment, the valve element assembly reducing the flow area between the check valve and the second opening portion includes: and reducing the flow passage area between the check valve and the second opening to less than 0.2 times that of the check valve when the check valve and the second opening are communicated.

As a preferred embodiment, the valve element assembly reducing the flow area between the check valve and the second opening portion includes: blocking the check valve and the second opening.

As a preferred embodiment, the valve element assembly reducing the flow area between the second opening portion and the third opening portion includes: and reducing the flow area between the second opening and the third opening to less than 0.2 times when the second opening and the third opening are communicated.

As a preferred embodiment, the valve element assembly reducing the flow area between the second opening portion and the third opening portion includes: blocking the second opening and the third opening.

As a preferred embodiment, the valve core assembly includes a first blocking member and a first force application member; the first urging member is configured to urge the first blocking member against a restoring force that communicates the check valve with the second opening.

As a preferred embodiment, the valve core assembly is provided with a stress structure linked with the first blocking piece; the stress structure is used for receiving driving force applied by the second liquid when the second liquid is input into the second opening part; the force-receiving structure enables the first blocking piece to block the one-way valve and the second opening under the driving force.

As a preferred embodiment, the force-receiving structure has a force-receiving surface perpendicular to the flow direction of the second liquid; the product of the water pressure of the stressed surface and the water pressure of the second liquid is larger than the acting force exerted by the first force application piece on the first blocking piece; wherein the water pressure of the second liquid is greater than 0.1 megapascals.

As a preferred embodiment, the force receiving structure is adjacent to the third opening portion with respect to the first blocking member; the first force application member is away from the third opening portion with respect to the first blocking member.

As a preferred embodiment, the first force application member is adjacent to the one-way valve with respect to the first blocking member; the second opening is located between the first blocking member and the stressed structure.

As a preferred embodiment, the force-receiving structure is fixedly connected to the first blocking member for movement therewith.

As a preferred embodiment, the force receiving structure is capable of blocking communication between the second opening and the third opening; wherein, the atress structure can when first shutoff piece blocks the check valve with the second opening portion, the intercommunication second opening portion with the third opening portion, and when first shutoff piece intercommunication the check valve with the second opening portion, the shutoff second opening portion with the third opening portion.

As a preferred embodiment, the first blocking member has a blocking position that blocks the check valve and the second opening portion and a communicating position that communicates the check valve and the second opening portion;

the stress structure has a closing position blocking the second opening portion and the third opening portion and an opening position communicating the second opening portion and the third opening portion;

when the second opening part inputs second liquid, the first blocking piece can be positioned at the blocking position, and the stress structure can be positioned at the opening position;

when the second opening part is not filled with the second liquid, the first blocking piece can be located at the communication position, and the stress structure can be located at the closing position.

As a preferred embodiment, the blocking position and the communication position are spaced apart by a predetermined distance.

As a preferred embodiment, at least one of the first force application member and the first blocking member is a magnetic element, and the other is attracted by the magnetic element; the first blocking piece is fixedly connected with the stress structure through a connecting rod.

As a preferred embodiment, the valve core assembly further has a first valve body; a first flow passage is arranged in the first valve body; the first flow passage is used for communicating the second opening part with the one-way valve and communicating the second opening part with the third opening part; the first blocking member and the force receiving structure move within the first flow passage in the first flow passage extending direction.

As a preferred embodiment, the first flow passage has one end provided with the first urging member and the other end provided with a communication opening through which the third opening portion is communicated; a water passing hole for communicating the first flow passage with the one-way valve and a communication hole for communicating the second opening with the first flow passage are formed on the side wall of the first valve body; the communication hole is located between the water passing hole and the communication opening.

As a preferred embodiment, a first annular sealing step is arranged on the inner wall of the first flow channel; the first annular sealing step is positioned between the water passing hole and the communication hole; the first blocking member is restrained when contacting the first annular sealing step and blocks the first flow passage to block the communication hole and the check valve.

As a preferred embodiment, a second annular sealing step is arranged on the inner wall of the first flow channel; the second annular seal step is located between the communication opening and the communication hole; the stress structure is limited when contacting with the second annular sealing step and plugs the first flow passage so as to block the communication hole and the third opening part.

As a preferred embodiment, a shielding cover for shielding one end of the first flow passage is arranged at one end of the first valve body, which is close to the one-way valve; a limiting part is arranged in the first flow passage; the first force application piece is clamped between the shielding cover and the limiting part.

As a preferred embodiment, the plurality of water passing holes and the plurality of communication openings are provided on the side wall of the first valve body in the circumferential direction.

As a preferred embodiment, the blocking position and the communicating position are located at both sides of the water passing hole, respectively.

As a preferred embodiment, the check valve includes:

a second valve body having a flow passage; the runner is provided with an inlet communicated with the first opening part and an outlet communicated with the valve core assembly;

a second blocking member capable of closing and opening the flow passage;

and the second force application piece can apply elastic force or magnetic force to the second blocking piece.

As a preferred embodiment, at least one of the second force application member and the second blocking member is a magnetic element, the other being attractable by the magnetic element.

As a preferred embodiment, the valve comprises a housing; the first opening, the second opening, and the third opening are provided in the housing; the check valve and the valve core assembly are arranged in the shell.

As a preferred embodiment, a clearance runner communicated with the one-way valve is further arranged between the outer side wall of the first valve body and the inner side wall of the shell; the gap flow passage is in communication with the first flow passage.

As a preferred embodiment, the housing is further provided with a fourth opening portion adjacent to the first opening portion and communicating with the first opening portion; the fourth opening is located upstream of the one-way valve.

As a preferred embodiment, the first opening and the third opening are respectively disposed on opposite ends of the housing; the second opening and the fourth opening are arranged on the side wall of the shell.

As a preferred embodiment, the first opening is used for communicating with a water outlet of the water heater; the fourth opening is used for communicating a hot water inlet of the water end; the second opening part is used for communicating a cold water pipeline; the third opening part is used for communicating the cold water inlet of the water use end.

As a preferred embodiment, the housing comprises two connected first and second tee structures; the one-way valve is positioned in the first three-way structure; the valve core assembly is located in the second tee structure.

A water heating system, comprising:

a water heating device;

a preheating circulation pipeline communicated with the water heating device;

the circulating pump is arranged in the hot water device or on the preheating circulating pipeline and can drive water in the preheating circulating pipeline to flow;

the preheating circulation pipeline is provided with any valve which is connected with the water-using end in parallel; a spool assembly of the valve communicates the first opening and the second opening when the circulating pump drives the water of the preheating circulating pipeline to flow, and reduces an overflow area between the first opening and the second opening when cold water is output by a water end.

As a preferred embodiment, the water heating device comprises a gas water heater or a wall-mounted boiler.

The beneficial effects are that:

according to the valve provided by the embodiment of the application, the valve core assembly is arranged at the downstream of the one-way valve, the valve core assembly is used for reducing the overflow area between the one-way valve and the second opening part when the second opening part is used for inputting the second liquid, so that the one-way valve is prevented from being influenced by pressure drop when a user uses cold water, the probability of false opening of the one-way valve is reduced, hot water is effectively prevented from being output when the user uses cold water, and water experience is improved. And the valve core assembly is communicated with the one-way valve and the second opening part when the one-way valve is opened, so that water which is input from the first opening part and flows out of the water heater can flow to the second opening through the one-way valve, and the smooth progress of the preheating circulation is not influenced when the preheating circulation is performed.

Specific embodiments of the invention are disclosed in detail below 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 limited in scope thereby. 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.

It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic illustration of a valve provided in one embodiment of the present application;

FIG. 2 is a cross-sectional view of the structure of FIG. 1 in a first state;

FIG. 3 is a cross-sectional view of the structure of FIG. 1 in a second state;

FIG. 4 is a cross-sectional view of the second tee structure of FIG. 2;

FIG. 5 is a cross-sectional view of the second tee structure of FIG. 3;

FIG. 6 is a cross-sectional view of a valve provided in one embodiment of the present application in a first state;

FIG. 7 is a cross-sectional view of the structure of FIG. 8 in a second state;

fig. 8 is a schematic view of a water heating system to which fig. 1 is applied.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the 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 "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only 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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1 to 8. A valve is provided in an embodiment of the present application. Wherein the valve may be used as, but is not limited to, a two-position three-way valve, which may also be used in conjunction with a one-way valve 160 (return valve) in the pre-heat circulation line, or in some embodiments the valve may be used as a return valve in the pre-heat circulation line. Of course, the valve can also be applied to the use scene of other one-way valves, for example, the valve can be applied to the scene of preventing the one-way valve (160) from being opened by mistake.

In the present embodiment, the valve has a first opening 101 and a second opening 102, and a third opening 103. Wherein, the first opening 101 is used for inputting the first liquid. The third opening 103 is used for outputting the second liquid input from the second opening 102. When the first opening 101 is connected to the water outlet of the water heater, the first liquid may be hot water output from the water heater. When the second opening 102 is connected to a cold water pipe, the third opening 103 can output cold water inputted from the second opening 102.

The valve is provided with a spool assembly 150. The spool assembly 150 may have a first state and a second state. Of course, it is also understood that the spool assembly 150 has two operative positions: a first operating position and a second operating position.

Wherein, the valve core assembly 150 communicates the first opening 101 and the second opening 102 in the first state. In the second state, the spool assembly 150 reduces the flow area between the first opening 101 and the second opening 102.

In a further embodiment, the valve core assembly 150 is further capable of reducing the flow area between the second opening 102 and the third opening 103 in the first state; in the second state, the valve body assembly 150 may also communicate the second opening 102 with the third opening 103. In this embodiment, the valve cartridge assembly 150 controls communication between the different openings when in different states.

That is, in the first state, the valve body assembly 150 communicates the first opening 101 and the second opening 102, and reduces the flow area between the second opening 102 and the third opening 103. In the second state, the valve body assembly 150 communicates the second opening 102 and the third opening 103, and reduces the flow area between the first opening 101 and the second opening 102.

The flow area may be a flow passage cross-sectional area perpendicular to the flow direction of the fluid. It will be appreciated that the flow area may also correspond to the "opening" in the field of valves. The process of switching the valve core assembly 150 between the first state and the second state, that is, the process of changing the opening of the flow passage where the valve core assembly 150 is located.

In this embodiment, the valve core assembly 150 is movable between a first state and a second state. The switching action of the valve core assembly 150 may be translational, rotational, oscillatory, etc., and is not limited in this application. When the valve body assembly 150 is switched from the first state to the second state, the flow passage area between the first opening 101 and the second opening 102 is reduced. The first and second states of the spool assembly 150 may each be a fixed position. The valve element assembly 150 changes the opening degree (the overcurrent area) of the corresponding position during the switching between the first state and the second state.

In the embodiment shown in fig. 1-8, the valve core assembly 150 is switched between the first state and the second state by a linear reciprocating motion. It should be understood that the movement of the valve core assembly 150 is not limited to moving in a straight direction, and the movement of the valve core assembly 150 may be rotation or swing, or may be a combination of several movements, such as movement, rotation, swing, etc., which is not limited in this application.

Specifically, the valve body assembly 150 may be located in a flow passage that communicates the first opening 101 and the second opening 102. The valve core assembly 150 has an actuating member (such as a first blocking member described below) for reducing the flow passage area of the flow passage. When the valve element assembly 150 is in the second state, the flow path position (for example, a blocking position) where the operating member is located is smaller than the flow area of the position where the operating member is in the first state.

To clearly understand this point, the position of the flow path where the operating member stays in the second state (for example, a blocking position described below) may be set as the a position. The overcurrent area of the A position in the second state is smaller than that of the A position in the first state. The a position is located between the first opening 101 and the second opening 102, and when the check valve 160 is provided upstream of the spool assembly 150, the a position is located between the check valve 160 and the second opening 102.

The "a position located between the first opening 101 and the second opening 102" in the present application should be understood as "the first liquid passes through the a position when flowing from the first opening 101 to the second opening 102", and the a position is not necessarily limited to be located between the two in a generally understood visual position.

For example: when the first opening 101 and the second opening 102 are in the U-shaped flow path, the a position is located on the first opening 101 and the second opening 102 side when viewed from the visual sense, and the first liquid passes through the a position when flowing from the first opening 101 to the second opening 102, and the a position is also considered to be located between the first opening 101 and the second opening 102.

In the present embodiment, when the flow passage area at the predetermined position (for example, the position a) of the flow passage is reduced by (the operating member of) the valve element assembly 150, the shutoff is not required. That is, embodiments of the present application allow the Xu Faxin assembly 150 to allow water flow to leak in the second state. This is because reducing the flow passage flow area can suppress the pressure drop caused by the second liquid input from being transmitted to the check valve 160, and reduce the probability of the pressure difference reaching the opening pressure on both sides of the check valve 160, thereby reducing the probability of the false opening of the check valve 160.

In the present embodiment, the valve element assembly 150 does not affect the flow area of the a position in the first state, and thus does not affect the flow of the first liquid, that is, the warm-up cycle. The spool assembly 150 may reduce the flow area of the a-position when in the second state, for example: the area of the flow passing through the position a is reduced to 0.5 times that of the first state, and the actuating member may be half of the plugging plate in the embodiment shown in fig. 4 and 5, that is, the actuating member is a semicircular plate.

In one embodiment, the valve may further include a check valve 160 disposed between the first opening portion 101 and the second opening portion 102. When the check valve 160 is opened, the first liquid introduced from the first opening 101 is allowed to flow to the second opening 102. The valve may also be provided with a fourth opening 104 upstream of the non-return valve 160. A hot water inlet of a water end (e.g., a tap) is connected through the fourth opening 104. Thus, the valve can be directly applied to a preheating circulation pipeline to be used as a water return valve.

In this embodiment, the spool assembly 150 may be disposed downstream of the check valve 160. Accordingly, when the check valve 160 is opened, the spool assembly 150 communicates the check valve 160 with the second opening 102 (also communicates the first opening 101 with the second opening 102). When the second liquid is inputted into the second opening 102, the valve body assembly 150 reduces an overflow area between the check valve 160 and the second opening 102.

In the present embodiment, the spool assembly 150 achieves communication between the check valve 160 and the second opening portion 102 or reduces the flow area (reducing the flow area includes blocking) by switching between the first state and the second state. Specifically, the valve body assembly 150 may be located in a flow path that communicates the check valve 160 with the second opening 102, and the flow path may be a portion of the flow path between the first opening 101 and the second opening 102.

In view of the fact that the valve is used for warm-up cycle control, the flow path between the first opening 101 and the second opening 102 is used for circulating hot water, and accordingly, the flow path between the first opening 101 and the second opening 102 may also be referred to as "hot water flow path". Correspondingly, the valve core assembly 150 can control the on-off of the hot water flow passage.

When the valve is applied to a preheating circulation system, the first opening part 101 can be communicated with a water outlet of a water heater (namely a hot water outlet of the water heater) through a pipeline, and is connected with a cold water pipeline of the preheating circulation pipeline through the second opening part 102, and the cold water pipeline is also communicated with a water inlet of the water heater (namely a cold water inlet of the water heater) and a household tap water pipeline. The third opening 103 may communicate with a cold water inlet at the useful water end. The water-using end can be a tap or a shower or other household water-outlet components.

When the preheating cycle (i.e., the return water heating) is performed, the circulation pump is turned on. Based on the pressure provided by the circulation pump, an opening pressure is formed on both sides of the check valve 160 to open the check valve 160. At this time, the valve body assembly 150 communicates with the check valve 160 and the second opening 102, and does not affect the water flow path between the check valve 160 and the second opening 102, thereby ensuring smooth progress of the preheating cycle.

When the user uses cold water, the water end is opened, and cold water (tap water) enters the second opening 102 through the cold water pipe. At this time, the spool assembly 150 reduces the flow area between the check valve 160 and the second opening 102. Therefore, the pressure drop generated when the water end is opened can be reduced and transmitted to the upstream of the valve core assembly 150, the influence of the pressure drop on the one-way valve 160 is reduced, and the one-way valve 160 is prevented from being opened, so that the problem that hot water is output due to the fact that the preheating circulation is started by mistake when a user uses cold water can be effectively avoided.

The valve provided by the embodiments of the present application is provided by having a spool assembly 150 downstream of the check valve 160. The valve body assembly 150 reduces an area of the flow passage between the check valve 160 and the second opening 102 when the second liquid is supplied to the second opening 102. Therefore, when a user uses cold water, the pressure drop is prevented from being transmitted to the one-way valve 160, the probability of the one-way valve 160 being opened by mistake is reduced, and the water heater is prevented from being started by mistake, so that the user is effectively prevented from outputting hot water when using cold water, and the water use experience is improved. The spool assembly 150 communicates the check valve 160 with the second opening 102 when the check valve 160 is opened, so that the smooth progress of the warm-up cycle is not affected during the warm-up cycle.

In this embodiment, to ensure that the check valve 160 is prevented from being opened by mistake, the valve element assembly 150 includes: the area of the flow passage between the check valve 160 and the second opening 102 is reduced to 0.2 times or less the area of the flow passage when the flow passage is connected. Preferably, the valve body assembly 150 reduces an area of the flow passing between the check valve 160 and the second opening 102, including: blocking the check valve 160 and the second opening 102.

Further, the valve body assembly 150 reducing the flow area between the second opening 102 and the third opening 103 includes: the area of the flow passing between the second opening 102 and the third opening 103 is reduced to 0.2 times or less of that at the time of communication. Preferably, the valve body assembly 150 reduces an area of the flow passing between the second opening 102 and the third opening 103, including: the second opening 102 and the third opening 103 are blocked.

Such as: in other embodiments where the check valve 160 is not provided upstream of the spool assembly 150. The valve body assembly 150 reduces an area of the flow passing between the first opening 101 and the second opening 102, including: the area of the flow passing between the first opening 101 and the second opening 102 is reduced to 0.2 times or less of that at the time of communication. Further, the valve body assembly 150 reducing the flow area between the first opening 101 and the second opening 102 includes: the first opening 101 and the second opening 102 are blocked.

In the embodiment of the present application, the valve body assembly 150 may further communicate the second opening 102 with the third opening 103 when reducing the flow area between the check valve 160 and the second opening 102. The valve body assembly 150 can reduce the flow area between the second opening 102 and the third opening 103 when the check valve 160 and the second opening 102 are connected. At this point, the valve may be used as a "two-position three-way valve" in some embodiments.

In the present embodiment, when the check valve 160 is opened, the spool assembly 150 also reduces the flow area between the second opening 102 and the third opening 103. The valve body assembly 150 also communicates the second opening 102 with a third opening when the second liquid is input into the second opening 102.

Additionally, the valve core assembly 150 may not be used in a scenario with a check valve 160 or in an embodiment that is not integrated with a check valve 160, and the corresponding structure may be described with reference to fig. 4-7. In this embodiment, the valve cartridge assembly 150 may be driven by the second fluid to switch between the first state and the second state.

Specifically, when the second liquid is input into the second opening, the valve element assembly 150 can be switched from the first state to the second state under the driving of the second liquid, so that the second liquid is output from the third opening 103. Thus, the valve core assembly 150 can be associated with the input state of the second liquid, so that the combination of the water habit of the user and the operation and the use of the user are facilitated. For example: when the third opening 103 of the valve is communicated with the water end, the action of the valve core assembly 150 can be controlled by opening and closing the water end by a user, so that the control of the valve is realized, and the operation of the user is facilitated.

Further, the valve cartridge assembly 150 is capable of being reset from the second state to the first state when the second fluid is not input into the second opening. Accordingly, the valve core assembly 150 is provided with a reset mechanism, and the initial state of the valve core assembly 150 is the first state by the reset force applied by the reset mechanism. In the present embodiment, the reset mechanism provides the reset force in various manners, for example, the first force application member 6 may be reset by an electric driving manner, or may be mechanically reset by an elastic force or a magnetic force (also referred to as a magnetic force in the present embodiment).

In the present embodiment, the valve includes a housing 100. The housing 100 has various forms of shape and configuration. The housing 100 may be matched to the shape and configuration of the flow channel therein, and is not limited in any way. Of course, the casing 100 is integrally formed with a pipe body to accommodate the cold and hot water pipeline structure of the room, so that the installation and connection are convenient.

In the present embodiment, the first opening 101, the second opening 102, and the third opening 103 are provided in the housing 100. Among them, the first, second and third opening parts 101, 102 and 103 have an opening structure for inflow or outflow of fluid, which is particularly but not limited to a joint structure or a pipe body structure provided on the housing 100 so as to be connected to other pipes for installation.

In the present embodiment, the first opening 101, the second opening 102, and the third opening 103 may be flexibly provided in the housing 100, and the present application is not limited thereto. For example, the first opening 101, the second opening 102, and the third opening 103 may be provided on the side wall of the housing 100, or the first opening 101 and the third opening 103 may be provided at both ends of the housing 100 as shown in fig. 1 to 7, and the second opening 102 may be provided on the side wall of the housing 100.

To facilitate installation in the preheating circulation line. The housing 100 is further provided with a fourth opening 104 adjacent to the first opening 101 and communicating with the first opening 101. The fourth opening 104 is located upstream of the one-way valve 160. The first opening 101 and the fourth opening 104 may be directly connected, and a structure for controlling the connection therebetween may not be provided.

To facilitate the application of the valve in a preheating circulation system, the first opening 101 is used for communicating with a water outlet of a water heater; the fourth opening 104 is used for communicating with a hot water inlet of the water end; the second opening 102 is used for communicating with a cold water pipeline; the third opening 103 is used for communicating with a cold water inlet of the water use end.

In the embodiment shown in fig. 1 to 7, the first opening 101 and the third opening 103 are respectively disposed at opposite ends of the housing 100. The second opening 102 and the fourth opening 104 are provided on a side wall of the housing 100. Of course, the present invention is not limited thereto, and in the embodiments shown in fig. 6 and 7, the first opening 101 and the second opening 102 are respectively provided at opposite ends of the housing 100. The third opening 103 and the fourth opening 104 are provided on a side wall of the housing 100.

Specifically, the housing 100 includes two connected first tee structures 110 and a second tee structure 120. The check valve 160 is positioned within the first tee structure 110 and the valve core assembly 150 is positioned within the second tee structure 120. As shown in fig. 1-3. The first opening 101 and the fourth opening 104 are respectively located at two ends of the first tee structure 110, and the remaining end is connected to one end 121 of the second tee structure 120. The second opening 102 and the third opening 103 are located at two ends of the second three-way structure 120, respectively.

In the present embodiment, the first opening 101, the second opening 102, and the third opening 103 are formed in the case 100. The housing 100 has a hot water flow path (first liquid flow path) that communicates the first opening 101 and the second opening 102, and a cold water flow path (second liquid flow path) that communicates the second opening 102 and the third opening 103.

Wherein, a portion of the valve core assembly 150 may be located in the hot water flow path and a portion of the valve core assembly 150 may be located in the cold water flow path. The hot water flow path connecting the first opening 101 and the second opening 102 and the cold water flow path connecting the second opening 102 and the third opening 103 may be independent flow paths or may share a part of flow paths, and the present application is not limited thereto.

In the present embodiment, the hot water flow path and the cold water flow path may have a single channel structure without branch channels, may have a plurality of branch channels, or may have a case where a trunk and a branch exist in a mixed manner. In the case where there are a plurality of branch passages in the hot water flow passage or the cold water flow passage, the spool assembly 150 may reduce the flow passage area of the flow passage where the portion of the branch passages is blocked.

In the present embodiment, the cross-section of the hot water flow path and the cold water flow path may have various shapes, for example: circular, polygonal, or other irregular shapes. Therefore, in the present embodiment, the hot water flow path and the cold water flow path are only required to be capable of flowing water, and the structure and construction of the specific flow path are not limited in any way.

In the embodiment shown in fig. 4-5, the hot water flow channel and the cold water flow channel share a portion of the flow channel extending in the vertical direction near the second opening 102, and the flow channels of the non-shared portion are located on the left and right sides of the spool assembly 150 (based on the direction when the reader faces fig. 1-5). In the embodiment shown in fig. 6 and 7, the hot water flow path and the cold water flow path share a portion of the flow path extending vertically in the vicinity of the second opening 102. In the non-common portion, a partial flow passage that communicates the second opening 102 and the third opening 103 is located on the upper side of the valve body assembly 150, and a partial flow passage that communicates the first opening 101 and the second opening 102 is located on the left side of the valve body assembly 150.

Please refer to fig. 1 to 8. The valve cartridge assembly 150 includes a first blocking member 5 and a first force application member 6. The first urging member 6 is configured to apply a restoring force for communicating the check valve 160 and the second opening 102 to the first blocking member 5. When the second liquid is stopped from being supplied to the second opening 102, the first shutter 5 can be reset to the first state by providing the reset force. Accordingly, the first state may be the initial state of the valve cartridge assembly 150.

Wherein the first force application member 6 is capable of providing a restoring force to the first blocking member 5. The restoring force may be present at all times or may be generated after the first blocking member 5 is moved out of the initial position, which is not limited in this application. There are various ways in which the first urging member 6 provides the restoring force, for example, the first urging member 6 may be restored by an electric drive, or may be mechanically restored by an elastic force or a magnetic force (also referred to as a magnetic force in some embodiments of the present application).

In a preferred embodiment, at least one of the first force application member 6 and the first blocking member 5 is a magnetic element, and the other is attracted by the magnetic element. Based on the magnetic attraction of the first force application member 6 and the first blocking member 5.

When the first blocking member 5 moves a predetermined distance to the blocking position (position of the first blocking member 5 in the second state), the flow passage is closed and the circulation waterway is communicated. At this time, the attractive force applied to the first closing member 5 by the first urging member 6 is reduced, and the closing position can be maintained, and the closing state of the check valve 160 and the second opening 102 can be maintained. Even if there is a certain pressure drop (for example, reducing the opening degree of the faucet) after the second opening part 102 is communicated with the third opening part 103, or if there is a pressure fluctuation in the hydraulic pressure of the second liquid, the valve core assembly 150 can also keep the first sealing member 5 at the sealing position, so that the pressure drop is avoided to reach the side of the check valve 160, the probability of the false opening of the check valve 160 is reduced, a stable sealing state is formed, and thus the output state of the second liquid is maintained.

When the second opening 102 stops inputting the second liquid, the driving force applied by the first force application member 6 can drive the first blocking member 5 to return. At this time, the pressure difference across the force receiving structure 7 disappears, and the first blocking member 5 is re-attracted to the communication position by the attractive force of the first force applying member 6 and the first blocking member 5, so that the check valve 160 is re-communicated with the second opening 102.

The relative position between the first blocking member 5 and the first force application member 6 can also be flexibly set due to the large range of magnetic force, for example: the first blocking member 5 and the first urging member 6 may or may not be in contact with each other. The first force application member 6 preferably has a fixed position, i.e. the first force application member 6 is stationary.

The shapes of the first blocking member 5 and the first urging member 6 may have various shapes and configurations, and the present application is not limited thereto. For example: the first blocking member 5 may be positioned in the flow path between the first opening 101 (or the check valve 160) and the second opening 102, in which case the shape of the first blocking member 5 may match the cross-sectional shape of the flow path or the cross-sectional shape of the flow path at the blocked position. For another example: when the first force application member 6 is located outside the housing 100 or the flow channel, the shape of the first force application member 6 is not limited, and only the first force application member 6 needs to be ensured to be attracted with the magnetic force of the first blocking member 5.

In other embodiments, the first blocking member 5 may be located outside the housing 100 (for example, the blocking member is located outside one end of the housing 100 to block and open the port of the housing 100), and the shape and structure of the first blocking member 5 are not limited at all, and only the first blocking member 5 is required to block the flow channel. In particular, the first blocking member 5 may be a plate, block, cap or other structure, and may have a circular, polygonal or irregular cross-section. The first force application member 6 may be annular, plate-like, block-like or other shape.

In this embodiment, the first blocking member 5 and the force receiving structure 7 are fixedly connected by a connecting rod 8. The first force application member 6 and the first blocking member 5 are attracted to each other by magnetic force, and the force receiving structure 7 moves together with the first blocking member 5 while the first blocking member 5 is attracted to move by the first force application member 6. In other embodiments, the first force application member 6 and the first blocking member 5 may be reset by an elastic force.

It can be seen that the valve provided in this embodiment is a mechanically operated valve that switches the communication between different openings using the input liquid, without electric driving, and has a high reliability and a low manufacturing cost.

In this embodiment, the valve core assembly 150 may further be provided with a force-receiving structure 7 that is linked with the first blocking member 5. The force receiving structure 7 is used for receiving the driving force applied by the second liquid when the second liquid is input into the second opening 102. The force receiving structure 7 makes the first blocking member 5 block the check valve 160 and the second opening 102 under the driving force.

In this embodiment, when the first blocking member 5 and the force receiving structure 7 are linked, the actions of the first blocking member 5 and the force receiving structure 7 may be the same or different. For example, in the embodiment shown in fig. 1-7, both the first blocking member 5 and the force-receiving structure 7 may be moved in translation by the same distance. In some embodiments, the first blocking member 5 and the force-receiving structure 7 have different forms of action, such as: the first blocking piece 5 realizes the blocking and opening of the target runner or the runner where the first blocking piece is located through rotation, and the stress structure 7 realizes the blocking and opening of the target runner or the runner where the first blocking piece is located through translation, swing and other action modes different from rotation.

Of course, in other embodiments, the first blocking member 5 and the force receiving structure 7 may also have the same action, but the displacement or rotation angle of the two may be different, which is not limited in this application.

Preferably, the force-bearing structure 7 is fixedly connected with the first blocking member 5 to move together. In the embodiment shown in fig. 1 to 7, the first closure plate forming the first closure element 5 and the second closure plate forming the shown stressed structure 7 are fixedly connected by means of a connecting rod 8. The connecting rod 8 may be coaxially disposed with the first and second blocks 5, 150 to facilitate movement stability of the spool assembly 150. In the embodiment shown in fig. 6 to 7, the first blocking member 5 is a cylindrical structure for blocking the openings 2 and 3.

In this embodiment, the force-receiving structure 7 has a force-receiving surface perpendicular to the flow direction of the second liquid. The product of the force-bearing surface and the water pressure of the second liquid is larger than the force applied by the first force application member 6 to the first blocking member 5. Wherein the water pressure of the second liquid is greater than 0.1 megapascals. The pressure of the second liquid may be a household water pressure.

Of course, the force bearing surface of the force bearing structure 7 may be other shapes, and the present application is not limited. It should be noted that, when the stress surface of the stress structure 7 is a curved surface or is not perpendicular to the second liquid flow direction, the projected area of the stress structure 7 on the surface perpendicular to the second liquid flow direction is the actual stress area of the stress structure 7.

As shown in fig. 1 to 7, the force receiving structure 7 is close to the third opening 103 with respect to the first blocking member 5. The first urging member 6 is away from the third opening 103 with respect to the first blocking member 5. The first blocking member 5 is located between the force receiving structure 7 and the first force application member 6. The valve core assembly 150 (the first blocking member 5 and the force receiving structure 7) reciprocates in a direction toward the third opening 103 or in the opposite direction to switch between the first state and the second state.

In the embodiment shown in fig. 4 to 5, the force receiving structure 7 is located between the second opening 102 and the third opening 103. The first force application member 6 is positioned adjacent to the one-way valve 160 with respect to the first blocking member 5. The second opening 102 is located between the first blocking member 5 and the force receiving structure 7. The first opening 101 and the check valve 160 are located on one side of the second opening 102, and the third opening 103 is located on the other side of the second opening 102. The first blocking member 5 moves on one side of the second opening 102, and the force receiving structure 7 moves on the other side of the second opening 102.

Of course, the position of the force receiving structure 7 is not limited to the above-described position setting manner. In the embodiment shown in fig. 6 to 7, the third opening 103 is located between the first opening 101 (or the check valve 160) and the second opening 102, and the force receiving structure 7 and the first blocking member 5 reciprocate in a direction parallel to the direction of the third opening 103. A receiving groove is provided in a wall of the housing 100 opposite to the third opening 103 to receive the first blocking member 5.

In the embodiment of the present application, the force receiving structure 7 may always be in communication with the second opening 102 and the third opening 103 during operation, or may reduce the flow area between the second opening 102 and the third opening 103. Preferably, in order to facilitate the force application of the second liquid to the force-receiving structure 7, the force-receiving structure 7 can also block the communication between the second opening 102 and the third opening 103. The valve is driven by the force of the second liquid through the force bearing structure 7, so that the valve is switched between the first state and the second state, and an electric driving structure is not required.

Specifically, the force receiving structure 7 can communicate the second opening 102 and the third opening 103 when the first blocking member 5 blocks the check valve 160 and the second opening 102, and can block the second opening 102 and the third opening 103 when the first blocking member 5 communicates the check valve 160 and the second opening 102.

In the embodiment shown in fig. 1-7, the stressing structure 7 and the first blocking member 5 are arranged along the entire extension of the flow channel. The direction of the entire extension of the flow path is the same as the direction of the third opening 103. When the reader is faced with fig. 4 and 5, the stress structure 7 and the first blocking member 5 are arranged in the left-right direction. The force-receiving structure 7 and the first blocking member 5 can move together in the left-right direction and the displacement is the same, so that the valve core assembly 150 can be switched between the first state and the second state.

In a specific embodiment, the first blocking member 5 has a blocking position that blocks the check valve 160 and the second opening 102 and a communicating position that communicates the check valve 160 and the second opening 102. Wherein the blocking position and the communicating position are spaced apart by a predetermined distance.

In this embodiment, the blocking position and the communication position may be a fixed position. The first blocking member 5 is limited when in the blocking position and cannot move further in a direction away from the communication position, and the first blocking member 5 is limited when in the communication position and cannot move further in a direction away from the blocking position. The first blocking member 5 is located at the blocking position to block the flow passage between the check valve 160 and the second opening 102 to block the flow of water, and the first blocking member 5 is located at the communicating position to open the flow passage (at this time, the flow passage between the check valve 160 and the second opening 102 is in the communicating state).

The transition between blocking and communication can be understood during the movement of the first blocking element 5, i.e. the presence of a slight water leakage during the movement of the first blocking element 5 is permissible (e.g. the area of the flow is reduced to less than 0.1 times that of communication), which is very weak for the pressure difference across the first blocking element 5. The flow passage where the first blocking member 5 is located is in a completely opened state when it is located at the communication position, and the pressure relief (pressure drop) at this time is very obvious compared with the pressure relief caused by the above-mentioned water flow leakage, and at the same time, the water flow is also relatively large.

It should be noted that, the predetermined distance between the blocking position and the communicating position may enable the first blocking member 5 at the blocking position to still keep the blocking state of the flow passage when there is slight movement, so as to avoid the pressure drop from being transferred to the position of the check valve 160, and the stability is better. Of course, the present application does not exclude embodiments in which the first closure member 5 is displaced, i.e. opened.

In this particular embodiment, further, the force receiving structure 7 has a closed position blocking the second opening 102 and the third opening 103 and an open position communicating the second opening 102 and the third opening 103. Considering that the stress structure 7 and the first blocking member 5 are a linkage structure, the closing position and the opening position of the stress structure 7 may refer to the blocking position and the communicating position of the first blocking member 5, which are not described herein.

When the second liquid is input into the second opening 102, the first blocking member 5 is located at the blocking position, and the force receiving structure 7 is located at the opening position. When the second liquid is not input into the second opening 102, the first blocking member 5 is located at the communication position, and the force receiving structure 7 is located at the closing position.

When the valve is applied to a warm-up cycle, the valve core assembly 150 is in the first state when in a warm-up cycle state. At this time, the second liquid is not input into the second opening 102, the check valve 160 is opened, the first blocking member 5 is located at the communicating position, and the force receiving structure 7 is located at the closing position.

The valve core assembly 150 is in the second state when the water-using end outputs cold water. At this time, the second liquid is introduced into the second opening 102, the first blocking member 5 is positioned at the blocking position, and the force receiving structure 7 is positioned at the open position. The check valve 160 is kept in a closed state, and the check valve 160 can effectively solve the problem of erroneous opening of the check valve 160 because the pressure drop generated by opening the cold water cannot be sensed.

In the embodiment of the present application, the valve core assembly 150 is disposed inside the housing 100. To facilitate the valve core assembly 150 to switch between communicating different openings in different conditions. The valve cartridge assembly 150 also has a first valve body 1. A first flow passage 13 is provided in the first valve body 1. The first flow passage 13 forms a partial flow passage between the first opening 101 and the second opening 102. The first valve body 1 may be tubular as a whole. The first valve body 1 may be disposed in parallel with the longitudinal direction of the housing 100, or may be disposed vertically.

In the embodiment shown in fig. 4 and 5, the longitudinal direction of the first valve body 1 is parallel to the longitudinal direction of the housing 100 and is coaxially arranged. The first flow passage 13 is used to communicate the second opening 102 with the check valve 160 and to communicate the second opening 102 with the third opening 103. The first blocking member 5 and the force receiving structure 7 move within the first flow channel 13 in the direction in which the first flow channel 13 extends.

The first flow channel 13 has one end provided with the first urging member 6 and the other end provided with the communication opening 4 through which the third opening 103 communicates. A water passing hole 2 for communicating the first flow passage 13 and the check valve 160, and a communication hole 3 for communicating the second opening 102 and the first flow passage 13 are formed in a side wall of the first valve body 1. The communication hole 3 is located between the water passing hole 2 and the communication opening 4.

In order to avoid wear or high resistance to movement during movement of the first blocking element 5, an end seal is used in this embodiment. Specifically, a first annular sealing step 9 is provided on the inner wall of the first flow channel 13. The first annular sealing step 9 is located between the water passing hole 2 and the communication hole 3. The first blocking member 5 is restrained when contacting the first annular sealing step 9 and blocks the first flow passage 13 to block the communication hole 3 and the check valve 160 (water passing hole 2).

In this embodiment, the first annular sealing step 9 forms a first valve seat for cooperation with the first closure member 5. When the first blocking member 5 is in the blocking position, the surfaces of the first blocking member 5 opposite to the first annular sealing step 9 are sealed against each other.

Further, in order to avoid abrasion or high movement resistance during the movement of the force receiving structure 7, end face sealing is also used in this embodiment. A second annular sealing step 15 is provided on the inner wall of the first flow channel 13. The second annular seal step 15 is located between the communication opening 4 and the communication hole 3. The force receiving structure 7 is restrained when contacting the second annular sealing step 15 and seals the first flow passage 13 to block the communication hole 3 and the third opening 103.

In this embodiment, the second annular sealing step 15 forms a second valve seat for cooperation with the force-receiving structure 7. When the stress structure 7 is located at the plugging position, the surfaces of the stress structure 7 opposite to the second annular sealing step 15 are mutually attached and sealed. The sealing surface of the second valve seat and the sealing surface of the first valve seat face each other, and the first sealing piece 5 and the stress structure 7 are limited through the first annular sealing step 9 and the second annular sealing step 15, so that the first sealing piece 5 and the stress structure 7 are prevented from continuing to move after reaching a preset position.

In this embodiment, the end of the first valve body 1 provided with the first force application member 6 is a closed end, and the side provided with the communication opening 4 may be an open end (may also be referred to as an open end, opposite to the closed end). A shielding cover 10 for shielding one end of the first flow channel 13 is arranged at one end of the first valve body 1 near the one-way valve 160. A limiting part is arranged in the first flow channel 13. The first force application member 6 is interposed between the shielding cover 10 and the stopper.

In order to ensure that the first blocking piece 5 is smoothly reset, the blocking cover 10 can be further provided with a through hole, so that when the first blocking piece 5 moves from the blocking position to the communicating position, the first blocking piece 5 cannot be completely reset due to water accumulation between the blocking cover 10 and the first blocking piece 5.

In the present embodiment, the plurality of water passing holes 2 and the plurality of communication openings 4 are provided on the side wall of the first valve body 1 in the circumferential direction. Considering that the water passing hole 2 is provided on the side wall of the first valve body 1, a gap runner 12 communicating with the check valve 160 is further provided between the outer side wall of the first valve body 1 and the inner side wall of the housing 100. The gap flow channel 12 communicates with the first flow channel 13. When the check valve 160 is opened, the first liquid is output through the check valve 160, sequentially enters the first flow channel 13 through the clearance flow channel 12 and the water passing hole 2, then enters the second opening 102 through the first annular sealing step 9 and the communication hole 3, and finally is output by the second opening 102.

In this embodiment, the blocking position and the communicating position are located at both sides of the water passing hole 2, respectively. The blocking position is positioned on one side of the water passing hole 2 close to the second opening part 102, and the communicating position is positioned on one side of the water passing hole 2 far away from the second opening part 102.

Of course, in some embodiments, the valve core assembly 150 may be directly disposed in the housing 100 of the valve and operate in the housing 100 without disposing the first valve body 1. For example, the valve core assembly 150 may include a plugging plate capable of swinging around a pivot axis, the plugging plate is rotatably connected to the inner wall of the housing 100, the stress structure 7 may adopt a translational form shown in fig. 1 to 7, and the stress structure 7 drives the plugging plate to swing, so as to realize switching between different states of the valve core assembly 150.

It should be noted that the structures shown in fig. 4 to 7 are part of the structures of fig. 1 to 3, but fig. 4 to 7 may be applied as independent embodiments of the present application. Accordingly, in the embodiment of fig. 4 to 7 as a separate embodiment, the joint 121 may be the "first opening portion 101".

In the embodiment shown in fig. 6 and 7, the flow passage in the first valve body 1 includes two sub flow passages: the first sub-flow passage and the second sub-flow passage are separated by a partition plate. The first valve body 1 is integrally and vertically installed in the housing 100. The valve cartridge assembly 150 reciprocates in the up-down direction. Wherein the communication opening 4 is located at one end of the first sub-flow passage, the other end communication hole 3 of the first sub-flow passage is communicated with the second opening 102, and the second sub-flow passage penetrates the first valve body 1 along the extending direction (left-right direction) of the housing 100 and has the water passing hole 2.

In the present embodiment, a receiving recess is provided in the side of the housing 100 facing away from the third opening 103, in which the first urging member 6 is fixedly mounted. Wherein, be equipped with clamping ring 14 in the accommodation groove, compress tightly the first application of force piece 6 fixed in the bottom of accommodation groove through clamping ring 14. The first blocking member 5 has a cylindrical structure or a tubular structure, is limited when contacting the partition plate, and blocks the first sub-flow passage.

It should be noted that fig. 6-7 may be applied as independent embodiments of the present application. Accordingly, in the embodiment of fig. 4 to 5 as a separate embodiment, the joint 121 may be the "first opening portion 101". In addition, FIGS. 6 and 7 may also incorporate a one-way valve 160 to form a valve of similar construction to that shown in FIGS. 1-3.

As shown in fig. 2 and 3. The check valve 160 includes: a second valve body 161 having a flow passage; the flow passage has an inlet communicating with the first opening 101 and an outlet communicating with the valve cartridge assembly 150; a second blocking member 162 capable of closing and opening the flow passage; a second force applying member 163 capable of applying an elastic force or a magnetic force to the second blocking member 162.

The check valve 160 may be an elastic valve or a magnetic valve. When the elastic valve is used as a magnetic valve, the second blocking member 162 implements a one-way switch by an elastic force applied by a second urging member such as a spring. Preferably, at least one of the second urging member 163 and the second blocking member 162 is a magnetic element, and the other is attracted by the magnetic element.

In a specific embodiment, the construction, shape and function of the second valve body 161, the second blocking member 162 and the second force application member 163 of the check valve 160 in this embodiment may refer to the main body, the blocking member and the inhalable member of the constant pressure switch device disclosed in the chinese patent application No. 201510685827.5, named "constant pressure switch device and hot water system", and will not be described herein again.

Please continue to refer to fig. 1-8. The embodiment of the application also provides a valve which is a two-position three-way valve. Specifically, the valve has a first opening 101, a second opening 102 and a third opening 103. The valve is provided with a spool assembly 150; the spool assembly 150 has a first state and a second state. In the first state, the valve body assembly 150 communicates the first opening 101 and the second opening 102, and reduces the flow area between the second opening 102 and the third opening 103. In the second state, the valve body assembly 150 communicates the second opening 102 and the third opening 103, and reduces the flow area between the first opening 101 and the second opening 102.

Wherein the valve core assembly 150 can be switched from the first state to the second state by the driving of the second liquid when the second liquid is input into the second opening, so that the second liquid is output from the third opening 103; the valve cartridge assembly 150 is capable of being reset from the second state to the first state when the second fluid is not input to the second opening.

The first opening 101 is used for communicating with a water outlet of the water heater. The second opening 102 is used for communicating with a cold water pipeline; the third opening 103 is used for communicating with a cold water inlet of the water end. The water heater (also referred to as a water heater) may be a gas water heater or a wall-mounted boiler.

In the preheat cycle state, the spool assembly 150 is in the first state. The valve core assembly 150 is in the second state when the water-using end outputs cold water. Further, a check valve 160 is provided between the first opening 101 and the second opening 102; the check valve 160 is located upstream of the spool assembly 150.

The valve in this embodiment is applied to a warm-up circulation system (such as a hot water system described below). When a user uses cold water, the valve core assembly is driven to a second state by using the water pressure of the cold water (second liquid), the valve core assembly can block between the first opening part and the second opening part, and water output by the water heater is prevented from flowing into one side where the second opening part and the third opening part are located, so that hot water is effectively prevented from being output when the user uses the cold water, and water use experience is improved.

The valve in this embodiment may refer to the description of the valve provided in each embodiment, and will not be described in detail here.

Please refer to fig. 8. There is also provided in an embodiment of the present application a water heating system, including: a water heating device 50; a preheating circulation line communicating with the water heating device 50; and a circulation pump provided in the hot water apparatus 50 or on the preheating circulation line, the circulation pump being capable of driving the flow of water in the preheating circulation line. The water heater 50 may be a gas water heater or a wall-mounted boiler.

The pre-heating circulation line is provided with a valve 51 as described in any of the embodiments or examples above, connected in parallel with the water-consuming end 55. The valve body assembly 150 of the valve 51 communicates the first opening 101 and the second opening 102 when the circulation pump drives the flow of water in the warm-up circulation line, and reduces the flow area between the first opening 101 and the second opening 102 when the cold water is output from the water end 55.

As shown in fig. 8, the preheating circulation line may include a water inlet pipe 53 communicating with the water heating device 50, and a water outlet pipe 52. The inlet pipe 53 is used for inputting cold water (communicated with a cold water inlet pipe or a household water inlet pipe 54). The outlet pipe 52 communicates with the first opening 101 of the valve 51.

Also connected to the valve 51 is a cold water pipe 56 (in the above-described embodiments referred to as a cold water pipe). The cold water pipe 53 is in communication with the inlet pipe 53 and is used for feeding cold water (in communication with a cold water inlet pipe or service pipe 54). The fourth opening 104 and the third opening 103 of the valve 51 are connected to the hot water inlet and the cold water inlet of the water use terminal 10, respectively.

Any numerical value recited herein includes all values of the lower and upper values that increment by one unit from the lower value to the upper value, as long as there is a spacing of at least two units between any lower value and any higher value. For example, if it is stated that the number of components or the value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, then the purpose is to explicitly list such values as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. in this specification as well. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be explicitly recited in this description, and all possible combinations of values recited between the lowest value and the highest value are believed to be explicitly stated in the description in a similar manner.

Unless otherwise indicated, all ranges include endpoints and all numbers between endpoints. "about" or "approximately" as used with a range is applicable to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30," including at least the indicated endpoints.

All articles and references, including patent applications and publications, disclosed herein are 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 substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional.

Multiple 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, component, section or step is not intended to exclude other elements, components, sections or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the inventors regard such subject matter as not be considered to be part of the disclosed subject matter.

Claims

1. A valve, characterized in that the valve has a first opening portion and a second opening portion, and a one-way valve provided between the first opening portion and the second opening portion; when the one-way valve is opened, allowing the first liquid input by the first opening part to flow to the second opening part;

The valve is also provided with a valve core assembly positioned downstream of the one-way valve; the valve core component is communicated with the one-way valve and the second opening part when the one-way valve is opened; the valve element assembly reduces an area of the flow passing between the check valve and the second opening portion when the second liquid is input into the second opening portion;

the valve core assembly comprises a first blocking piece and a first force application piece; the first force application member is configured to apply a restoring force for communicating the check valve and the second opening to the first blocking member;

the first force application member is reset in an electric driving mode, or reset in an elastic force mechanical mode, or reset in a magnetic force mechanical mode.

2. A valve as defined in claim 1, wherein: the valve element assembly is further capable of communicating the second opening portion with the third opening portion when reducing an area of the flow passing between the check valve and the second opening portion, and reducing an area of the flow passing between the second opening portion and the third opening portion when communicating the check valve with the second opening portion.

3. A valve, characterized in that the valve has a first opening, a second opening and a third opening; the valve is provided with a valve core assembly; the valve core assembly has a first state and a second state;

The first opening part is used for inputting first liquid, and the third opening part is used for outputting second liquid input by the second opening part;

a one-way valve is arranged between the first opening part and the second opening part; allowing the first liquid input from the first opening to flow to the second opening when the check valve is opened;

the valve core assembly can be switched from a first state to a second state under the drive of the second liquid when the second liquid is input into the second opening part, so that the second liquid is output from the third opening part; the valve core assembly can be reset from the second state to the first state when the second liquid is not input into the second opening part;

4. A valve as claimed in claim 3, wherein: the first opening part is used for communicating with a water outlet of the water heater; the second opening part is used for communicating a cold water pipeline; the third opening part is used for communicating a cold water inlet of the water end;

5. The valve of claim 4, wherein: a one-way valve is arranged between the first opening part and the second opening part; the check valve is located upstream of the spool assembly.

6. A valve according to any one of claims 1 to 5, wherein: the valve element assembly reducing an area of excess flow between the check valve and the second opening portion includes: and reducing the flow passage area between the check valve and the second opening to less than 0.2 times that of the check valve when the check valve and the second opening are communicated.

7. The valve of claim 6, wherein: the valve element assembly reducing an area of excess flow between the check valve and the second opening portion includes: blocking the check valve and the second opening.

8. A valve according to any one of claims 1 to 5, wherein: the valve element assembly reducing an area of excess flow between the second opening portion and the third opening portion includes: and reducing the flow area between the second opening and the third opening to less than 0.2 times when the second opening and the third opening are communicated.

9. The valve of claim 8, wherein: the valve element assembly reducing an area of excess flow between the second opening portion and the third opening portion includes: blocking the second opening and the third opening.

10. A valve according to any one of claims 1 to 5, wherein: the valve core assembly is provided with a stress structure linked with the first blocking piece; the stress structure is used for receiving driving force applied by the second liquid when the second liquid is input into the second opening part; the force-receiving structure enables the first blocking piece to block the one-way valve and the second opening under the driving force.

11. The valve of claim 10, wherein: the stress structure is provided with a stress surface perpendicular to the flow direction of the second liquid; the product of the water pressure of the stressed surface and the water pressure of the second liquid is larger than the acting force exerted by the first force application piece on the first blocking piece; wherein the water pressure of the second liquid is greater than 0.1 megapascals.

12. The valve of claim 10, wherein: the stress structure is close to the third opening part relative to the first blocking piece; the first force application member is away from the third opening portion with respect to the first blocking member.

13. The valve of claim 12, wherein: the first force application piece is close to the one-way valve relative to the first blocking piece; the second opening is located between the first blocking member and the stressed structure.

14. The valve of claim 10, wherein: the stress structure is fixedly connected with the first blocking piece to move together.

15. The valve of claim 14, wherein: the stress structure can be used for blocking the communication between the second opening part and the third opening part; wherein, the atress structure can when first shutoff piece blocks the check valve with the second opening portion, the intercommunication second opening portion with the third opening portion, and when first shutoff piece intercommunication the check valve with the second opening portion, the shutoff second opening portion with the third opening portion.

16. The valve of claim 15, wherein: the first blocking piece is provided with a blocking position for blocking the one-way valve and the second opening part and a communicating position for communicating the one-way valve and the second opening part;

17. The valve of claim 16, wherein: the blocking position and the communicating position are spaced apart by a predetermined distance.

18. The valve of claim 17, wherein: at least one of the first force application piece and the first blocking piece is a magnetic element, and the other one can be attracted by the magnetic element; the first blocking piece is fixedly connected with the stress structure through a connecting rod.

19. The valve of claim 16, wherein: the valve core assembly is also provided with a first valve body; a first flow passage is arranged in the first valve body; the first flow passage is used for communicating the second opening part with the one-way valve and communicating the second opening part with the third opening part; the first blocking member and the force receiving structure move within the first flow passage in the first flow passage extending direction.

20. The valve of claim 19, wherein: one end of the first runner is provided with the first force application member, and the other end of the first runner is provided with a communication opening communicated with the third opening part; a water passing hole for communicating the first flow passage with the one-way valve and a communication hole for communicating the second opening with the first flow passage are formed on the side wall of the first valve body; the communication hole is located between the water passing hole and the communication opening.

21. The valve of claim 20, wherein: a first annular sealing step is arranged on the inner wall of the first flow passage; the first annular sealing step is positioned between the water passing hole and the communication hole; the first blocking member is restrained when contacting the first annular sealing step and blocks the first flow passage to block the communication hole and the check valve.

22. The valve of claim 20, wherein: a second annular sealing step is arranged on the inner wall of the first flow passage; the second annular seal step is located between the communication opening and the communication hole; the stress structure is limited when contacting with the second annular sealing step and plugs the first flow passage so as to block the communication hole and the third opening part.

23. The valve of claim 20, wherein: a shielding cover for shielding one end of the first flow passage is arranged at one end of the first valve body, which is close to the one-way valve; a limiting part is arranged in the first flow passage; the first force application piece is clamped between the shielding cover and the limiting part.

24. The valve of claim 20, wherein: the water passing holes and the communication openings are circumferentially arranged on the side wall of the first valve body.

25. The valve of claim 20, wherein: the blocking position and the communicating position are respectively positioned at two sides of the water passing hole.

26. The valve of claim 19, wherein: the check valve includes:

a second blocking member capable of closing and opening the flow passage;

27. The valve of claim 26, wherein: at least one of the second force application piece and the second blocking piece is a magnetic element, and the other one can be attracted by the magnetic element.

28. The valve of claim 26, wherein: the valve includes a housing; the first opening, the second opening, and the third opening are provided in the housing; the check valve and the valve core assembly are arranged in the shell.

29. The valve of claim 28, wherein: a clearance runner communicated with the one-way valve is further arranged between the outer side wall of the first valve body and the inner side wall of the shell; the gap flow passage is in communication with the first flow passage.

30. The valve of claim 28, wherein: the shell is also provided with a fourth opening which is close to the first opening and communicated with the first opening; the fourth opening is located upstream of the one-way valve.

31. The valve of claim 28, wherein: the first opening and the third opening are respectively arranged at two opposite ends of the shell; the second opening and the fourth opening are arranged on the side wall of the shell.

32. The valve of claim 30, wherein: the first opening part is used for communicating with a water outlet of the water heater; the fourth opening is used for communicating a hot water inlet of the water end; the second opening part is used for communicating a cold water pipeline; the third opening part is used for communicating the cold water inlet of the water use end.

33. A valve as claimed in claim 30 or 31, wherein: the shell comprises a first tee joint structure and a second tee joint structure which are connected; the one-way valve is positioned in the first three-way structure; the valve core assembly is located in the second tee structure.

34. A water heating system, comprising:

a water heating device;

a preheating circulation pipeline communicated with the water heating device;

the preheating circulation pipeline is provided with a valve as claimed in any one of claims 1 to 33, which is connected in parallel with the water-using end; a spool assembly of the valve communicates the first opening and the second opening when the circulating pump drives the water of the preheating circulating pipeline to flow, and reduces an overflow area between the first opening and the second opening when cold water is output by a water end.

35. The water heating system as set forth in claim 34, wherein: the water heating device comprises a gas water heater or a wall-mounted boiler.