CN208919401U

CN208919401U - Valve and its hot-water heating system

Info

Publication number: CN208919401U
Application number: CN201821383031.XU
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: 2019-05-31
Anticipated expiration: 2028-08-24

Abstract

The application discloses a kind of valve and its hot-water heating system, wherein the valve has the first opening portion and the second opening portion and the check valve being arranged between first opening portion and second opening portion；When the check valve is opened, the first liquid for allowing first opening portion to input flows to second opening portion；The valve is equipped with third opening portion；The third opening portion is used to export the second liquid of the second opening portion input；Wherein, the valve is additionally provided with the core assembly positioned at the check valve downstream；The core assembly is connected to the check valve and second opening portion when the check valve is opened；The core assembly reduces the area of passage between the check valve and second opening portion when second opening portion inputs the second liquid.The valve exports hot water when can effectively avoid user using cold water, and improvement is tested with water body.

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 every time, particularly in winter with low temperature, tap water is drained off in vain, a lot of time is delayed, and the use experience is influenced greatly. This is a common use problem in the water heater industry.

In order to solve the problem, in the prior art, a preheating circulation pipeline is established between a water using point and a water heater in a mode that a preheating circulation water return valve is arranged between a hot water outlet pipe and a cold water pipe of the water heater and the cold water pipe is used as a water return pipe, and low-temperature water is conveyed into the water heater through the preheating circulation pipeline to be heated in a non-water using 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:

one, when user's home water pressure ratio is great or hot water pipeline water resistance is less, current wet return exists that the user opens easy mistake when cold water and opens, leads to the problem of output hot water, influences user and uses experience.

Secondly, in order to avoid the water return valve from being opened by mistake when the user opens the cold water, the water return valve can be provided with a flow limiting structure (generally called as water limitation) at the cold water outlet so as to reduce the flow of the cold water outlet. However, this easily results in a user having a relatively small water flow rate, sometimes even less than 4L/min, when using cold water, which has a large adverse effect on the user's water experience.

Thirdly, even if the cold water outlet of the water return valve is provided with a water limiting structure, when the water pressure of a user home is large or the water resistance of a hot water pipeline is small, the problem of mistaken opening can be solved.

SUMMERY OF THE UTILITY MODEL

Through long-time research and experiments of the inventor, the water pressure of one side of the water return valve, which is connected with the cold water pipeline, is instantly reduced due to the entrainment effect at the moment that a user opens cold water, and the water pressure of one side of the water return valve, which is connected with the hot water pipeline, is basically kept unchanged. At the moment, pressure difference can occur on two sides of the valve core of the water return valve, and the water return valve can be opened to leak when the pressure difference reaches the opening pressure difference of the valve core. When the flow reaches the flow of the preheating circulation starting, the gas water heating device is started by mistake.

Although the pressure difference of the instant valve opening can be reduced by adding the 'water limitation' to the cold water outlet, the flow of the cold water outlet is reduced, and the user experience is poor. Because the opening of the 'water limiting' structure is fixed, when the water pressure of a user home is high or the water resistance of a hot water pipeline is low, the possibility of reaching the pressure difference of a valve is still existed, so that the problem of mistaken opening is also existed, and the user can output hot water instead when using cold water.

In view of the deficiencies of the prior art, it is an object of the present invention to provide a valve and a hot water system thereof, which can solve 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, the first liquid input from the first opening part is allowed to flow to the second opening part;

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

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

In a preferred embodiment, the valve body assembly is configured to communicate the second opening portion with the third opening portion when the flow area between the check valve and the second opening portion is reduced, and to reduce the flow area between the second opening portion and the third opening portion when the check valve and the second opening portion are communicated.

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;

when the valve core assembly is in the first state, the first opening part and the second opening part are communicated, and the flow area between the second opening part and the third opening part is reduced;

when the valve core assembly is in the second state, the second opening part and the third opening part are communicated, and the flow area between the first opening part and the second opening part is reduced;

the valve core assembly can be switched from a first state to a second state under 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; the valve core assembly can be reset to the first state from the second state when the second opening does not input the second liquid.

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

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

In 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 core assembly reducing the flow area between the check valve and the second opening portion includes: the flow area between the check valve and the second opening is reduced to 0.2 times or less of that when the check valve and the second opening are communicated with each other.

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

As a preferred embodiment, the valve core assembly reducing an area of flow between the second opening portion and the third opening portion includes: the flow area between the second opening and the third opening is reduced to 0.2 times or less of that in the case of communication.

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

As a preferred embodiment, the valve core assembly comprises a first blocking piece and a first force application piece; the first urging member is configured to apply a restoring force for communicating the check valve with the second opening portion to the first blocking member.

As a preferred embodiment, the valve core assembly is provided with a stressed structure which is linked with the first plugging piece; the force-bearing structure is used for receiving the driving force exerted by the second liquid when the second liquid is input into the second opening part; the force-receiving structure causes the first blocking member to block the check valve and the second opening portion under the driving force.

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

As a preferred embodiment, the force-bearing structure is close to the third opening portion with respect to the first block piece; the first force application member is far away from the third opening relative to the first blocking member.

As a preferred embodiment, the first force application member is close to the check valve with respect to the first blocking member; the second opening portion is located between the first blocking piece and the stressed structure.

As a preferred embodiment, the force-bearing structure is fixedly connected to the first closure element for movement therewith.

In a preferred embodiment, the force-receiving structure can block the second opening and the third opening from communicating with each other; wherein the force-receiving structure is capable of communicating the second opening portion with the third opening portion when the first blocking member blocks the check valve and the second opening portion, and blocking the second opening portion with the third opening portion when the first blocking member communicates the check valve with the second opening portion.

As a preferred embodiment, the first closing member has a closing position closing the check valve and the second opening portion and a communication position communicating the check valve and the second opening portion;

the force-bearing structure has a closed position blocking the second opening portion and the third opening portion and an open position communicating the second opening portion and the third opening portion;

when the second opening part is used for inputting second liquid, the first blocking piece can be located at the blocking position, and the stress structure can be located at the opening position;

when the second opening part is not used for inputting 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 communicating 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 capable of being attracted by the magnetic element; the first plugging piece and the stressed structure are fixedly connected 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 block piece and the force-bearing structure move within the first flow channel in the direction of extension of the first flow channel.

In a preferred embodiment, one end of the first flow passage is provided with the first force application member, and the other end thereof is provided with a communication opening communicating with the third opening; a water through hole for communicating the first flow passage with the one-way valve and a communication hole for communicating the second opening part 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.

In a preferred embodiment, 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 through hole and the communication hole; the first blocking piece is limited when contacting the first annular sealing step and blocks the first flow passage to block the communication hole and the one-way valve.

In a preferred embodiment, 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 force bearing structure is limited when contacting with the second annular sealing step and blocks the first flow channel to block the communication hole and the third opening.

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 close to the one-way valve; a limiting part is arranged in the first flow channel; the first force application piece is clamped between the shielding cover and the limiting portion.

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

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

As a preferred embodiment, the check valve includes:

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

a second closure capable of closing and opening the flow passage;

and the second force applying piece can apply elastic force or magnetic force to the second plugging piece.

In a preferred embodiment, at least one of the second force applying member and the second closing member is a magnetic member, and the other is attracted by the magnetic member.

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 inside the shell.

As a preferred embodiment, a clearance flow channel 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 clearance flow passage communicates 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.

In a preferred embodiment, the first opening and the third opening are respectively provided at opposite ends of the housing; the second opening portion and the fourth opening portion are disposed on a side wall of the housing.

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

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

A water heating system, comprising:

a hot water device;

the preheating circulating pipeline is communicated with the hot water 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;

any one of the valves is arranged on the preheating circulation pipeline and is connected with the water using end in parallel; the valve core assembly of the valve is used for communicating the first opening part with the second opening part when the circulating pump drives the water of the preheating circulating pipeline to flow, and reducing the flow area between the first opening part and the second opening part when the water end outputs cold water.

In a preferred embodiment, the water heater includes a gas water heater or a wall-hanging stove.

Has the advantages that:

the valve that this application embodiment provided is equipped with the case subassembly through the low reaches at the check valve, the case subassembly is in the input of second opening reduces during the second liquid the check valve with the area of overflowing between the second opening to avoid the pressure drop to influence the check valve when the user uses cold water, reduce the probability that the check valve mistake was opened, thereby output hot water when effectively avoiding the user to use cold water, improve and use water to experience. 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 flowing out of the water heater and input from the first opening part can flow to the second opening part through the one-way valve, and the smooth operation of the preheating circulation is not influenced during the preheating circulation.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present 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.

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 illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic view 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 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 accordance with an embodiment of the present application in a first state;

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

fig. 8 is a schematic view of a hot water system using fig. 1.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments 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 obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection 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 be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

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. As used herein, the term "and/or" 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. The valve may be used as, but not limited to, a two-position three-way valve, and may also be used in conjunction with a check valve 160 (a water return valve) in the preheat cycle line, or in some embodiments, the valve may also be used as a water return valve in the preheat cycle line. Of course, the valve can also be applied to other use scenes of the one-way valve, for example, the valve can be applied to the scene that the one-way valve (160) needs to be prevented from being opened by mistake.

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

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

Wherein, when the valve core assembly 150 is in the first state, the first opening part 101 and the second opening part 102 are communicated. When the valve body assembly 150 is in the second state, the flow area between the first opening 101 and the second opening 102 is reduced.

In a further embodiment, when the valve core assembly 150 is in the first state, the flow area between the second opening 102 and the third opening 103 can be reduced; the valve body assembly 150 is capable of communicating the second opening 102 and the third opening 103 when in the second state. In this embodiment, the valve core 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 with 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 cross-sectional area of the flow channel perpendicular to the flow direction of the fluid. It will be appreciated that the flow area may also correspond to the "opening" in the valve field. The process of switching the valve core assembly 150 from the first state to the second state, that is, the process of changing the opening degree of the flow passage in which the valve core assembly 150 is located.

In the present 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 can be translation, rotation, swing, etc., and the application is not limited thereto. When the valve body assembly 150 is switched from the first state to the second state, the flow area between the first opening portion 101 and the second opening portion 102 is reduced. The first and second states of the valve core assembly 150 may each be a fixed position. During the switching of the valve core assembly 150 from the first state to the second state, the opening degree (flow area) of the corresponding position changes.

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 action form of the valve core assembly 150 is not limited to moving along a straight line, and the action of the valve core assembly 150 may also be rotating or swinging, and of course, may also be a combination of several actions, such as moving, rotating, swinging, etc., and the present application is not limited thereto.

Specifically, the valve core assembly 150 may be located in a flow passage that communicates the first opening portion 101 and the second opening portion 102. The cartridge assembly 150 has an actuation member (such as a first closure member described below) for reducing the flow area of the flow path therethrough. When the valve core assembly 150 is in the second state, the flow passage position (such as the blocking position) of the actuating member is reduced in area compared to the flow passage position when the actuating member is in the first state.

For clarity of understanding, 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. And the flow area of the position A in the second state is smaller than that of the position A in the first state. The a position is located between the first opening portion 101 and the second opening portion 102, and when the check valve 160 is provided upstream of the valve core assembly 150, the a position is located between the check valve 160 and the second opening portion 102.

In the present application, the phrase "the position a is located between the first opening 101 and the second opening 102" is to be understood as "the first liquid passes through the position a when flowing from the first opening 101 to the second opening 102", and is not limited to the case where the position a is located between the two in a generally understood visible position.

For example: when the U-shaped flow path is formed between the first opening 101 and the second opening 102, the a-position is located on the first opening 101 and the second opening 102 side in a visual observation, 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, (the actuating member of) the valve body assembly 150 may be configured so that the blocking is not required when the flow area at the predetermined flow passage position (for example, the position a) is reduced. That is, in the present embodiment, the cartridge assembly 150 is allowed to allow water to leak when in the second state. This is because the reduction of the flow area of the flow path can suppress the pressure drop caused by the input of the second liquid from being transmitted to the check valve 160, and reduce the probability of the pressure difference reaching the opening on both sides of the check valve 160, thereby reducing the probability of the erroneous opening of the check valve 160.

In the present embodiment, the flow area of the position a is not affected by the valve core assembly 150 in the first state, so that the flow of the first liquid is not affected, that is, the preheating cycle is not affected. The spool assembly 150 may reduce the flow area at position a when in the second state, for example: the flow area at position a is reduced to 0.5 times that in the first state, and at this time, the actuating member may be half of the blocking plate in the embodiment shown in fig. 4 and 5, that is, the actuating member is a half circular 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 inputted 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 one-way valve 160. A hot water inlet of a water end (for example, a faucet) is connected to the fourth opening 104. Thus, the valve can be directly applied to the preheating circulation pipeline to be used as a water return valve.

In this embodiment, the valve cartridge assembly 150 may be disposed downstream of the check valve 160. Accordingly, when the check valve 160 is opened, the valve core assembly 150 communicates the check valve 160 with the second opening portion 102 (also communicating the first opening portion 101 with the second opening portion 102). When the second liquid is input into the second opening portion 102, the valve core assembly 150 reduces the flow area between the check valve 160 and the second opening portion 102.

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

Considering that the flow passage between the first opening portion 101 and the second opening portion 102 is used to circulate hot water when the valve is applied to the warm-up cycle control, accordingly, the flow passage between the first opening portion 101 and the second opening portion 102 may also be referred to as a "hot water flow passage". Accordingly, 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 having a water usage end. The water using end can be a faucet or a shower head or other household water outlet components.

When the preheating circulation (namely backwater heating) is carried out, the circulating pump is turned on. Based on the pressure provided by the circulation pump, an opening pressure is developed across the check valve 160 to open the check valve 160. At this time, the valve core assembly 150 communicates the check valve 160 with the second opening 102, and does not affect the water flow path between the check valve 160 and the second opening 102, so that the preheating cycle can be smoothly performed.

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

The valve provided by the embodiment of the application is provided with the valve core assembly 150 at the downstream of the one-way valve 160. The valve core assembly 150 reduces an area of flow between the check valve 160 and the second opening 102 when the second liquid is input into the second opening 102. Thereby, avoid the pressure drop to transmit to check valve 160 when the user uses cold water, reduce the probability that check valve 160 mistake was opened, avoid the water heater mistake to start to output hot water when effectively avoiding the user to use cold water, improve and use water and experience. Also, the valve body assembly 150 communicates the check valve 160 with the second opening portion 102 when the check valve 160 is opened, so that smooth progress of the preheating cycle is not affected during the preheating cycle.

In this embodiment, in order to ensure a better effect of preventing the check valve 160 from being opened by mistake, the valve core assembly 150 for reducing the flow area between the check valve 160 and the second opening portion 102 includes: the flow area between the check valve 160 and the second opening 102 is reduced to 0.2 times or less of that in the case of communication. Preferably, the valve core assembly 150 for reducing the flow area between the check valve 160 and the second opening portion 102 includes: the check valve 160 and the second opening 102 are blocked.

Further, the valve core assembly 150 for reducing the flow area between the second opening portion 102 and the third opening portion 103 includes: the flow area between the second opening 102 and the third opening 103 is reduced to 0.2 times or less of that in the case of communication. Preferably, the valve core assembly 150 for reducing the flow area between the second opening portion 102 and the third opening portion 103 includes: the second opening 102 and the third opening 103 are blocked.

In the following cases such as: other embodiments where the check valve 160 is not located upstream of the cartridge assembly 150. The valve core assembly 150 for reducing the flow area between the first opening portion 101 and the second opening portion 102 includes: the flow area between the first opening 101 and the second opening 102 is reduced to 0.2 times or less of that in the case of communication. Further, the valve core assembly 150 reducing the flow area between the first opening portion 101 and the second opening portion 102 includes: the first opening 101 and the second opening 102 are blocked.

In the present embodiment, the valve body assembly 150 can communicate the second opening 102 and the third opening 103 when the flow area between the check valve 160 and the second opening 102 is reduced. In addition, 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 communicate with each other. At this point, the valve may be used in some embodiments as a "two-position, three-way valve".

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

In addition, the valve core assembly 150 may not be used in a scenario with the check valve 160 or in an embodiment not combined with the check valve 160, and the corresponding structure can be seen in fig. 4 to 7. In this embodiment, the cartridge assembly 150 may be actuated by a second fluid to switch between the first and second states.

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

Further, the valve core assembly 150 can be reset from the second state to the first state when the second opening is not supplied with the second liquid. 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 may provide a 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 embodiments of the present application).

In the present embodiment, the valve includes a housing 100. The housing 100 has various forms of shapes, configurations. The housing 100 may be configured to match the shape of the flow passage therein, and the application is not limited thereto. Of course, the housing 100 is a tube to accommodate the structure of the cold and hot water pipes in the room, so as to facilitate installation and connection.

In the present embodiment, the first opening 101, the second opening 102, and the third opening 103 are provided in the housing 100. The first opening 101, the second opening 102 and the third opening 103 have opening structures for fluid inflow or outflow, and are not limited to joint structures or pipe structures disposed on the housing 100, so as to be connected to other pipelines for installation.

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

For ease of installation in the preheat 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 directly communicate with each other, and a structure for controlling the communication may not be provided therebetween.

In order to facilitate the application of the valve in the preheating circulation system, the first opening part 101 is used for communicating with a water outlet of a water heater; the fourth opening 104 is used for connecting a hot water inlet of a universal water end; the second opening part 102 is used for communicating a cold water pipeline; the third opening 103 is used for communicating with a cold water inlet of the water using end.

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

Specifically, the housing 100 includes a first tee structure 110 and a second tee structure 120 connected together. The check valve 160 is located in the first three-way structure 110, and the valve core assembly 150 is located in the second three-way 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 both ends of the second three-way structure 120, respectively.

In the present embodiment, the case 100 has the first opening 101, the second opening 102, and the third opening 103 opened therein. The housing 100 has a hot water flow passage (first liquid flow passage) that communicates the first opening 101 with the second opening 102, and a cold water flow passage (second liquid flow passage) that communicates the second opening 102 with the third opening 103.

Wherein a portion of the valve core assembly 150 may be located in the hot water flow passage and a portion of the valve core assembly 150 may be located in the cold water flow passage. The hot water flow passage that communicates the first opening 101 with the second opening 102 and the cold water flow passage that communicates the second opening 102 with the third opening 103 may be independent flow passages or may share a part of the flow passages, and the present invention is not limited thereto.

In the present embodiment, the hot water flow passage and the cold water flow passage may have a single passage structure without a branch passage, may have a plurality of branch passages, or may have a case where a main passage and a branch passage are mixed. In the case that there are a plurality of branch channels in the hot water flow channel or the cold water flow channel, the valve core assembly 150 can block part of the branch channels, so as to reduce the flow area of the flow channel.

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

In the embodiment shown in fig. 4-5, the hot water flow passage and the cold water flow passage share the partial flow passage extending vertically near the second opening portion 102, and the flow passages of the non-shared portion are located on the left and right sides of the valve core assembly 150 (with reference to the direction of the reader facing fig. 1-5). In the embodiment shown in fig. 6 and 7, the hot water flow passage and the cold water flow passage share a part of the flow passage extending in the vertical direction near the second opening 102. Of the unshared portions, a partial flow passage that communicates the second opening portion 102 with the third opening portion 103 is located on the upper side of the valve body block 150, and a partial flow passage that communicates the first opening portion 101 with the second opening portion 102 is located on the left side of the valve body block 150.

Please refer to fig. 1 to 8. The valve core assembly 150 comprises a first blocking piece 5 and a first force application piece 6. The first urging member 6 is for urging the first blocking member 5 with a returning force for communicating the check valve 160 with the second opening 102. When the second opening 102 stops the input of the second liquid, the first closing member 5 can be returned to the first state by the return force. Accordingly, the first state may be an 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. This restoring force can be present all the time or can be generated after the first closing part 5 has moved out of the initial position, which is not limiting in the present application. The first force application member 6 can provide a reset force in various ways, for example, the first force application member 6 can be reset by an electric driving manner, and can also be reset mechanically by an elastic force or a magnetic force (also referred to as a magnetic force in the embodiments of the present application).

In a preferred embodiment, at least one of the first force applying member 6 and the first blocking member 5 is a magnetic element, and the other is capable of being 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 piece 5 moves a predetermined distance to reach the blocking position (the position of the first blocking piece 5 in the second state), the flow passage is closed, and the circulating waterway is communicated. At this time, the suction force applied to the first closing member 5 by the first biasing member 6 is reduced, and the closing position is maintained, so that the closed state of the check valve 160 and the second opening 102 is maintained. Even if a certain pressure drop exists after the second opening portion 102 and the third opening portion 103 are communicated (for example, the opening degree of a faucet is reduced), or the hydraulic pressure of the second liquid fluctuates, the valve core assembly 150 can keep the first blocking piece 5 at the blocking position, so that the pressure drop is prevented from reaching one side of the check valve 160, the probability of mistaken opening of the check valve 160 is reduced, a stable blocking state is formed, and 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 and reset the first blocking member 5. At this time, the pressure difference between both sides of the force receiving structure 7 disappears, and the first closing member 5 is attracted again to the communicating position by the attraction force of the first force application member 6 and the first closing member 5, thereby communicating the check valve 160 with the second opening portion 102 again.

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

It should be noted that the shapes of the first blocking member 5 and the first force applying member 6 also have various shape configurations, and the present application still does not put any limitation thereon. For example: the first blocking member 5 may be positioned in the flow channel between the first opening portion 101 (or the check valve 160) and the second opening portion 102, in which case the shape of the first blocking member 5 may be adapted to the cross-sectional shape of the flow channel, or to the cross-sectional shape of the flow channel at the location to be blocked. 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 can be magnetically attracted to 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 the port of the housing 100 open), and the shape and structure thereof are not limited at all, and only the first blocking member 5 is required to block the flow passage. Specifically, the first blocking member 5 may be a plate, a block, a cover or other structures, and the cross section thereof may also be a circle, a polygon or an irregular shape. The first force applying member 6 may be ring-shaped, plate-shaped, block-shaped, or other shapes.

In this embodiment, the first blocking element 5 and the stressed structure 7 are fixedly connected by a connecting rod 8. The first force application member 6 and the first blocking member 5 are mutually attracted through magnetic force, and the force bearing structure 7 moves together with the first blocking member 5 while the first blocking member 5 is attracted by the first force application member 6 to move. In other embodiments, the first force-applying member 6 and the first blocking member 5 can also be restored by elastic force.

It can be seen that the valve provided in this embodiment is a mechanically actuated valve that switches the communication between different openings and is driven by the liquid supplied, and does not require electric driving, and has a highly reliable structure and a reduced manufacturing cost.

In the embodiment of the present application, the valve core assembly 150 may further be provided with a force-bearing structure 7 linked with the first blocking piece 5. The force receiving structure 7 is configured to receive a 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 one-way valve 160 and the second opening portion 102 under the driving force.

In the present embodiment, when the first blocking piece 5 and the force-receiving structure 7 are linked, the actions of the first blocking piece 5 and the force-receiving structure 7 may be the same or different. For example, as shown in fig. 1-7, the first blocking member 5 and the force-receiving structure 7 can both perform a translational movement, and the translational distances are the same. In some embodiments, the first blocking element 5 and the force-bearing structure 7 have different action forms, such as: the first blocking piece 5 realizes the opening of the target flow passage or the flow passage at the target flow passage through rotation, and the stress structure 7 realizes the opening of the target flow passage or the flow passage at the target flow passage through the blocking of the flow passage in a translational motion mode, a swinging motion mode and other motion modes different from the rotation mode.

Of course, in other embodiments, the first blocking element 5 and the force-bearing structure 7 may also have the same action form, but the displacement or rotation angle of the two elements is different, and the application is not limited.

Preferably, the force-bearing structure 7 is fixedly connected to the first closing part 5 so as to move together. In the embodiment shown in fig. 1 to 7, the first closure plate forming the first closure part 5 and the second closure plate forming the force-bearing structure 7 are fixedly connected by means of a connecting rod 8. The connecting rod 8 may be disposed coaxially with the first and second plugs 5, 150 to facilitate the translational stability of the valve core assembly 150. In the embodiment shown in fig. 6 to 7, the first closing member 5 has a cylindrical structure in order to close the opening 2 and the opening 3.

In this embodiment, the force-receiving structure 7 has a force-receiving surface perpendicular to the direction of flow of the second liquid. The product of the pressure of the force-bearing surface and the second liquid is greater than the force exerted by the first force-exerting element 6 on the first blocking element 5. Wherein the second liquid has a water pressure greater than 0.1 mpa. The pressure of the second liquid may be the domestic household water pressure.

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

As shown in fig. 1 to 7, the force-receiving structure 7 is close to the third opening 103 relative to the first blocking piece 5. The first force application member 6 is distant from the third opening 103 with respect to the first block piece 5. The first blocking element 5 is located between the force-receiving structure 7 and the first force-applying element 6. The valve core assembly 150 (the first block piece 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 close to the check valve 160 with respect to the first block piece 5. The second opening 102 is located between the first blocking piece 5 and the force-receiving structure 7. The first opening 101 and the check valve 160 are located on the second opening 102 side, and the third opening 103 is located on the second opening 102 side. The first closing member 5 is moved at one side of the second opening 102, and the force receiving structure 7 is moved at the other side of the second opening 102.

Of course, the position of the force-receiving structure 7 is not limited to the above-mentioned position arrangement. 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 block piece 5 reciprocate in a direction parallel to the direction of the third opening 103. The wall of the housing 100 opposite to the third opening 103 is provided with an accommodating groove to accommodate the first blocking piece 5.

In the present embodiment, the force receiving structure 7 may be configured to constantly maintain communication between the second opening 102 and the third opening 103 during operation, or to reduce an area of flow between the second opening 102 and the third opening 103. Preferably, in order to make the force-bearing structure 7 better receive the force of the second liquid, the force-bearing structure 7 can also block the communication between the second opening 102 and the third opening 103. The valve receives the force application driving of the second liquid through the force receiving structure 7, thereby being switched between the first state and the second state without an electric driving structure.

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

In the embodiment shown in fig. 1-7, the force-bearing structure 7 and the first block piece 5 are arranged along the general extension of the flow channel. The overall extending direction of the flow channel is the same as the direction of the third opening 103. The force-receiving structure 7 and the first block piece 5 are arranged in the left-right direction when the reader is facing fig. 4, 5. And, the force receiving structure 7 and the first blocking piece 5 can move together in the left-right direction and the displacement is the same, thereby realizing the mutual switching of the valve core assembly 150 between the first state and the second state.

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

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

Here, the movement of the first closing part 5 is understood to be a transition between closing and communication, i.e. a slight water flow leakage is allowed (e.g. the flow area is reduced to less than 0.1 times the communication) during the movement of the first closing part 5, and the influence of the slight water flow leakage on the pressure difference across the first closing part 5 is very weak. When the first blocking piece 5 is located at the communication position, the flow channel is in a fully open state, and the pressure relief (pressure drop) is very obvious compared with the pressure relief caused by the water flow leakage, and meanwhile, the water flow is also large.

It should be noted that the predetermined distance between the blocking position and the communicating position can make the first blocking member 5 in the blocking position still keep the blocking state of the flow channel when it moves slightly, so as to avoid the pressure drop from being transmitted 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 5 is displaced, i.e. opened.

In this specific embodiment, further, the force receiving structure 7 has a closed position that blocks the second opening portion 102 and the third opening portion 103, and an open position that communicates the second opening portion 102 and the third opening portion 103. Considering that the stressed structure 7 and the first blocking piece 5 are linked structures, the closed position and the open position of the stressed structure 7 can refer to the descriptions of the blocking position and the communication position of the first blocking piece 5, and the description is omitted here.

When the second opening 102 is filled with the second liquid, the first blocking member 5 is in the blocking position and the force-receiving structure 7 is in the open position. When the second opening 102 is not filled with the second liquid, the first blocking member 5 is located at the communication position and the force-receiving structure 7 is located at the closed position.

When the valve is applied to a pre-heat cycle system, the valve core assembly 150 is in the first state in the pre-heat cycle state. At this time, the second opening 102 is not filled with the second liquid, the check valve 160 is opened, the first blocking member 5 is located at the communication position, and the force receiving structure 7 is located at the closed position.

When the water end outputs cold water, the valve core assembly 150 is in the second state. At this time, the second opening 102 is filled with the second liquid, the first blocking member 5 is located at the blocking position, and the force-receiving structure 7 is located at the opening position. The check valve 160 maintains a closed state, and the check valve 160 cannot sense a pressure drop caused by opening cold water, so that the problem of erroneous opening of the check valve 160 can be effectively solved.

In the present embodiment, the valve core assembly 150 is disposed inside the housing 100. To facilitate switching communication between different openings in different states of the valve core assembly 150. The valve core 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 channel 13 forms a partial flow channel 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 and the housing 100 may be disposed in parallel to each other in the longitudinal direction or may be disposed perpendicularly to each other.

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 disposed. 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 piece 5 and the force-bearing structure 7 move in the first flow channel 13 in the direction in which the first flow channel 13 extends.

One end of the first flow channel 13 is provided with the first force application member 6, and the other end thereof is provided with a 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 on 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 a high resistance to movement during the movement of the first closing part 5, an end face seal is used in this embodiment. Specifically, a first annular sealing step 9 is arranged on the inner wall of the first flow passage 13. The first annular sealing step 9 is located between the water passing hole 2 and the communication hole 3. The first blocking piece 5 is restricted and blocks the first flow passage 13 when contacting the first annular sealing step 9 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 cooperating with the first closure piece 5. When the first blocking element 5 is in the blocking position, the surfaces of the first blocking element 5 opposite the first annular sealing step 9 are in sealing abutment with each other.

Further, in order to avoid abrasion or large movement resistance during the movement of the force-bearing structure 7, the end face seal is also adopted in the embodiment. And a second annular sealing step 15 is arranged on the inner wall of the first flow passage 13. The second annular sealing step 15 is located between the communication opening 4 and the communication hole 3. The force-bearing structure 7 is limited when contacting the second annular sealing step 15 and blocks 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 seat cooperating 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 are opposite to each other, the first blocking piece 5 and the stress structure 7 are limited through the first annular sealing step 9 and the second annular sealing step 15, and the first blocking piece 5 and the stress structure 7 are prevented from moving continuously after reaching a preset position.

In the present embodiment, the end of the first valve element 1 where the first biasing member 6 is provided may be a closed end, and the side where the communication opening 4 is provided may be an open end (which may also be referred to as an open end, opposite to the closed end). One end of the first valve body 1 close to the one-way valve 160 is provided with a shielding cover 10 for shielding one end of the first flow passage 13. A limiting part is arranged in the first flow passage 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 reset smoothly, the shielding cover 10 can be provided with a through hole, so that when the first blocking piece 5 moves from the blocking position to the communication position, the first blocking piece 5 is prevented from being completely reset due to accumulated water between the shielding cover 10 and the first blocking piece 5.

In the present embodiment, a plurality of the water passing holes 2 and a plurality of the communication openings 4 are provided on the side wall of the first valve body 1 in the circumferential direction. Considering that the water through hole 2 is provided on the side wall of the first valve body 1, a gap flow passage 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 path 12 communicates with the first flow path 13. When the check valve 160 is opened, the first liquid is output through the check valve 160, then sequentially passes through the gap flow passage 12 and the water passing hole 2, enters the first flow passage 13, then passes through the first annular sealing step 9 and the communication hole 3, enters the second opening portion 102, and finally is output through the second opening portion 102.

In the present embodiment, the blocking position and the communication position are respectively located at both sides of the water passing hole 2. The blocking position is located on the side of the water passing hole 2 close to the second opening portion 102, and the communicating position is located on the side of the water passing hole 2 far from the second opening portion 102.

Of course, in some embodiments, the valve core assembly 150 may be disposed directly in the housing 100 of the valve without the first valve body 1, and may act in the housing 100. For example, the valve core assembly 150 may include a blocking plate capable of swinging around a pivot axis, the blocking plate is rotatably connected to the inner wall of the housing 100, the force-receiving structure 7 may adopt a translation manner as shown in fig. 1 to 7, and the force-receiving structure 7 drives the blocking plate to swing to realize the switching of different states of the valve core assembly 150.

It should be noted that although the structures shown in fig. 4 to 7 are partial structures of fig. 1 to 3, fig. 4 to 7 may be applied as independent embodiments of the present application. Accordingly, in fig. 4-7 as separate embodiments, 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 vertically installed in the housing 100. The spool assembly 150 reciprocates in the up-down direction. The communication opening 4 is located at one end of the first sub-flow passage, the communication hole 3 at the other end of the first sub-flow passage communicates with the second opening 102, and the second sub-flow passage penetrates the first valve body 1 in the extending direction (left-right direction) of the housing 100 and has the water through hole 2.

In the present embodiment, an accommodating groove is provided on a side of the housing 100 facing away from the third opening 103, and the first force application member 6 is fixedly mounted in the accommodating groove. Wherein, hold and be equipped with clamping ring 14 in the recess, through clamping ring 14 compresses tightly first application of force spare 6 and fixes the bottom at holding the recess. The first blocking piece 5 is of a column structure or a barrel-shaped structure, is limited when contacting with the partition plate and blocks the first sub-flow channel.

It should be noted that fig. 6-7 can be applied as independent embodiments of the present application. Accordingly, in fig. 4-5 as separate embodiments, the joint 121 may be the "first opening 101". Alternatively, figures 6 and 7 may incorporate a one-way valve 160 to form a valve of similar construction to that shown in figures 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 communicated with the first opening part 101 and an outlet communicated with the valve core assembly 150; a second closure 162 capable of closing and opening the flow passage; a second force application 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 a magnetic valve, the second blocking member 162 performs one-way switching by the elastic force applied by the second force applying member (e.g., a spring). Preferably, at least one of the second forcing 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 structure, shape and function of the second valve body 161, the second blocking piece 162 and the second force applying piece 163 of the check valve 160 in this embodiment can refer to the main body, the blocking piece and the absorbable piece of the constant pressure switch device disclosed in the chinese patent application No. 201510685827.5 entitled "constant pressure switch device and hot water system", which is not repeated herein.

Please continue to refer to fig. 1 to 8. Still provide a valve in the embodiment of this application, the valve is two three-way valves. Specifically, the valve has a first opening 101, a second opening 102, and a third opening 103. The valve is provided with a valve core assembly 150; the cartridge assembly 150 has a first state and a second state. In the first state, the valve body assembly 150 communicates the first opening 101 with the second opening 102, and reduces a 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.

When the second liquid is input into the second opening, the valve core 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; the valve core assembly 150 can be reset from the second state to the first state when the second opening is not filled with the second liquid.

The first opening 101 is used for communicating with a water outlet of the water heater. The second opening part 102 is used for communicating a cold water pipeline; the third opening 103 is used for connecting a cold water inlet of a water end. The water heater (also called as a hot water device) can be a gas water heater or a wall-mounted furnace.

In the preheat cycle state, the valve core assembly 150 is in the first state. When the water end outputs cold water, the valve core assembly 150 is in the second state. 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 cartridge assembly 150.

The valve in the present embodiment is applied to a preheating circulation system (such as a hot water system described below). When the user uses cold water, utilize the water pressure of cold water (second liquid) to drive the case subassembly to the second state, the case subassembly can be with blocking between first opening and the second opening, prevents that the water of water heater output from flowing into second opening and third opening place one side to output hot water when effectively avoiding the user to use cold water, improve and use water and experience.

The valve in this embodiment can refer to the description of the valve provided in each of the above embodiments, and is not described in detail here.

Please refer to fig. 8. There is also provided in an embodiment of the present application a hot water system, including: a hot water device 50; a preheating circulation line communicating with the hot water device 50; and the circulating pump is arranged in the hot water device 50 or on the preheating circulating pipeline and can drive water in the preheating circulating pipeline to flow. The water heater 50 may be a gas water heater or a wall-hanging stove.

The preheat circulation line is provided with a valve 51 as described in any one of the above embodiments or examples, in parallel with a water use end 55. The valve body assembly 150 of the valve 51 communicates the first opening portion 101 and the second opening portion 102 when the circulation pump drives the water of the preheating circulation line to flow, and reduces an area of flow passing between the first opening portion 101 and the second opening portion 102 when the water end 55 outputs cold water.

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

A cold water pipe 56 (referred to as a cold water pipe in the above-described embodiments) is also connected to the valve 51. The cold water pipe 53 is in communication with the inlet pipe 53 and is used for the input of cold water (in communication with a cold water inlet pipe or service water 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 using end 10, respectively.

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

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

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.

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 should instead 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 hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed inventive subject matter.

Claims

1. A valve characterized by 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, the first liquid input from the first opening part is allowed to flow to the second opening part;

2. The valve of claim 1, wherein: the valve core assembly is further capable of communicating the second opening portion and the third opening portion when reducing an area of flow between the check valve and the second opening portion, and reducing an area of flow between the second opening portion and the third opening portion when communicating the check valve and the second opening portion.

3. The valve of claim 1 or 2, wherein: the valve core assembly reducing the flow area between the check valve and the second opening portion includes: the flow area between the check valve and the second opening is reduced to 0.2 times or less of that when the check valve and the second opening are communicated with each other.

4. The valve of claim 3, wherein: the valve core assembly reducing the flow area between the check valve and the second opening portion includes: the check valve and the second opening portion are blocked.

5. The valve of claim 1 or 2, wherein: the valve core assembly reducing the flow area between the second opening portion and the third opening portion includes: the flow area between the second opening and the third opening is reduced to 0.2 times or less of that in the case of communication.

6. The valve of claim 5, wherein: the valve core assembly reducing the flow area between the second opening portion and the third opening portion includes: and blocking the second opening and the third opening.

7. The valve of claim 1 or 2, wherein: the valve core assembly comprises a first blocking piece and a first force application piece; the first urging member is configured to apply a restoring force for communicating the check valve with the second opening portion to the first blocking member.

8. The valve of claim 7, wherein: the valve core assembly is provided with a stress structure which is linked with the first plugging piece; the force-bearing structure is used for receiving the driving force exerted by the second liquid when the second liquid is input into the second opening part; the force-receiving structure causes the first blocking member to block the check valve and the second opening portion under the driving force.

9. The valve of claim 8, wherein: the force-bearing structure is provided with a force-bearing surface vertical to the flow direction of the second liquid; the product of the water pressure of the stressed surface and the second liquid is larger than the acting force applied to the first blocking piece by the first force applying piece; wherein the second liquid has a water pressure greater than 0.1 mpa.

10. The valve of claim 8, wherein: the force bearing structure is close to the third opening relative to the first block piece; the first force application member is far away from the third opening relative to the first blocking member.

11. The valve of claim 10, wherein: the first force applying member is close to the one-way valve relative to the first blocking member; the second opening portion is located between the first blocking piece and the stressed structure.

12. The valve of any of claims 8-11, wherein: the force-bearing structure is fixedly connected with the first blocking piece so as to move together.

13. The valve of claim 12, wherein: the stress structure can block the second opening part and the third opening part from being communicated; wherein the force-receiving structure is capable of communicating the second opening portion with the third opening portion when the first blocking member blocks the check valve and the second opening portion, and blocking the second opening portion with the third opening portion when the first blocking member communicates the check valve with the second opening portion.

14. The valve of claim 13, wherein: the first closing member has a closing position for closing the check valve and the second opening portion and a communication position for communicating the check valve and the second opening portion;

15. The valve of claim 14, wherein: the blocking position and the communicating position are spaced apart by a predetermined distance.

16. The valve of claim 15, wherein: at least one of the first force application part and the first plugging part is a magnetic element, and the other one can be attracted by the magnetic element; the first plugging piece and the stressed structure are fixedly connected through a connecting rod.

17. The valve of claim 14, 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 block piece and the force-bearing structure move within the first flow channel in the direction of extension of the first flow channel.

18. The valve of claim 17, wherein: one end of the first flow passage is provided with the first force application part, and the other end of the first flow passage is provided with a communication opening communicated with the third opening; a water through hole for communicating the first flow passage with the one-way valve and a communication hole for communicating the second opening part 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.

19. The valve of claim 18, 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 through hole and the communication hole; the first blocking piece is limited when contacting the first annular sealing step and blocks the first flow passage to block the communication hole and the one-way valve.

20. The valve of claim 18, 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 force bearing structure is limited when contacting with the second annular sealing step and blocks the first flow channel to block the communication hole and the third opening.

21. The valve of claim 18, wherein: one end of the first valve body, which is close to the one-way valve, is provided with a shielding cover which shields one end of the first flow passage; a limiting part is arranged in the first flow channel; the first force application piece is clamped between the shielding cover and the limiting portion.

22. The valve of claim 18, wherein: the water passing holes and the communication openings are circumferentially arranged on the side wall of the first valve body.

23. The valve of claim 18, wherein: the blocking position and the communicating position are respectively positioned at two sides of the water passing hole.

24. The valve of claim 17, wherein: the check valve includes:

a second closure capable of closing and opening the flow passage;

25. The valve of claim 24, wherein: at least one of the second force applying piece and the second plugging piece is a magnetic element, and the other one can be attracted by the magnetic element.

26. The valve of claim 24, 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 inside the shell.

27. The valve of claim 26, wherein: a gap flow channel communicated with the one-way valve is also arranged between the outer side wall of the first valve body and the inner side wall of the shell; the clearance flow passage communicates with the first flow passage.

28. The valve of claim 26, 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.

29. The valve of claim 26, wherein: the first opening part and the third opening part are respectively arranged at two ends of the shell, which are opposite to each other; the second opening portion and the fourth opening portion are disposed on a side wall of the housing.

30. The valve of claim 28, wherein: the first opening part is used for communicating with a water outlet of the water heater; the fourth opening is used for connecting a hot water inlet of the universal water end; the second opening part is used for communicating a cold water pipeline; the third opening is used for communicating a cold water inlet of the water using end.

31. The valve of claim 28 or 29, wherein: the shell comprises a first tee structure and a second tee structure which are connected with each other; the one-way valve is positioned in the first tee structure; the valve core assembly is located in the second three-way structure.

32. 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;

33. The valve of claim 32, 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 is used for connecting a cold water inlet of the water supply end;

34. The valve of claim 33, wherein: a check valve is further arranged between the first opening part and the second opening part; the check valve is located upstream of the spool assembly.

35. The valve of claim 34, wherein: the valve core assembly reducing the flow area between the check valve and the second opening portion includes: the flow area between the check valve and the second opening is reduced to 0.2 times or less of that when the check valve and the second opening are communicated with each other.

36. The valve of claim 35, wherein: the valve core assembly reducing the flow area between the check valve and the second opening portion includes: the check valve and the second opening portion are blocked.

37. The valve of any one of claims 32-34, wherein: the valve core assembly reducing the flow area between the second opening portion and the third opening portion includes: the flow area between the second opening and the third opening is reduced to 0.2 times or less of that in the case of communication.

38. The valve of claim 37, wherein: the valve core assembly reducing the flow area between the second opening portion and the third opening portion includes: and blocking the second opening and the third opening.

39. The valve of claim 34, wherein: the valve core assembly comprises a first blocking piece and a first force application piece; the first urging member is configured to apply a restoring force for communicating the check valve with the second opening portion to the first blocking member.

40. The valve of claim 39, wherein: the valve core assembly is provided with a stress structure which is linked with the first plugging piece; the force-bearing structure is used for receiving the driving force exerted by the second liquid when the second liquid is input into the second opening part; the force-receiving structure causes the first blocking member to block the check valve and the second opening portion under the driving force.

41. The valve of claim 40, wherein: the force-bearing structure is provided with a force-bearing surface vertical to the flow direction of the second liquid; the product of the water pressure of the stressed surface and the second liquid is larger than the acting force applied to the first blocking piece by the first force applying piece; wherein the second liquid has a water pressure greater than 0.1 mpa.

42. The valve of claim 40, wherein: the force bearing structure is close to the third opening relative to the first block piece; the first force application member is far away from the third opening relative to the first blocking member.

43. The valve of claim 42, wherein: the first force applying member is close to the one-way valve relative to the first blocking member; the second opening portion is located between the first blocking piece and the stressed structure.

44. The valve of any one of claims 40 to 43, wherein: the force-bearing structure is fixedly connected with the first blocking piece so as to move together.

45. The valve of claim 44, wherein: the stress structure can block the second opening part and the third opening part from being communicated; wherein the force-receiving structure is capable of communicating the second opening portion with the third opening portion when the first blocking member blocks the check valve and the second opening portion, and blocking the second opening portion with the third opening portion when the first blocking member communicates the check valve with the second opening portion.

46. The valve of claim 45, wherein: the first closing member has a closing position for closing the check valve and the second opening portion and a communication position for communicating the check valve and the second opening portion;

47. The valve of claim 46, wherein: the blocking position and the communicating position are spaced apart by a predetermined distance.

48. The valve of claim 47, wherein: at least one of the first force application part and the first plugging part is a magnetic element, and the other one can be attracted by the magnetic element; the first plugging piece and the stressed structure are fixedly connected through a connecting rod.

49. The valve of claim 46, 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 block piece and the force-bearing structure move within the first flow channel in the direction of extension of the first flow channel.

50. The valve of claim 49, wherein: one end of the first flow passage is provided with the first force application part, and the other end of the first flow passage is provided with a communication opening communicated with the third opening; a water through hole for communicating the first flow passage with the one-way valve and a communication hole for communicating the second opening part 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.

51. The valve of claim 50, 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 through hole and the communication hole; the first blocking piece is limited when contacting the first annular sealing step and blocks the first flow passage to block the communication hole and the one-way valve.

52. The valve of claim 50, 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 force bearing structure is limited when contacting with the second annular sealing step and blocks the first flow channel to block the communication hole and the third opening.

53. The valve of claim 50, wherein: one end of the first valve body, which is close to the one-way valve, is provided with a shielding cover which shields one end of the first flow passage; a limiting part is arranged in the first flow channel; the first force application piece is clamped between the shielding cover and the limiting portion.

54. The valve of claim 50, wherein: the water passing holes and the communication openings are circumferentially arranged on the side wall of the first valve body.

55. The valve of claim 50, wherein: the blocking position and the communicating position are respectively positioned at two sides of the water passing hole.

56. The valve of claim 49, wherein: the check valve includes:

a second closure capable of closing and opening the flow passage;

57. The valve of claim 56, wherein: at least one of the second force applying piece and the second plugging piece is a magnetic element, and the other one can be attracted by the magnetic element.

58. The valve of claim 56, 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 inside the shell.

59. The valve of claim 58, wherein: a gap flow channel communicated with the one-way valve is also arranged between the outer side wall of the first valve body and the inner side wall of the shell; the clearance flow passage communicates with the first flow passage.

60. The valve of claim 58, 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.

61. The valve of claim 58, wherein: the first opening part and the third opening part are respectively arranged at two ends of the shell, which are opposite to each other; the second opening portion and the fourth opening portion are disposed on a side wall of the housing.

62. The valve of claim 60, wherein: the first opening part is used for communicating with a water outlet of the water heater; the fourth opening is used for connecting a hot water inlet of the universal water end; the second opening part is used for communicating a cold water pipeline; the third opening is used for communicating a cold water inlet of the water using end.

63. The valve of claim 60 or 61, wherein: the shell comprises a first tee structure and a second tee structure which are connected with each other; the one-way valve is positioned in the first tee structure; the valve core assembly is located in the second three-way structure.

64. A hot water system, comprising:

a hot water device;

the preheating circulating pipeline is communicated with the hot water device;

the preheating circulation pipeline is provided with a valve as claimed in any one of claims 1 to 63 which is connected with the water using end in parallel; the valve core assembly of the valve is used for communicating the first opening part with the second opening part when the circulating pump drives the water of the preheating circulating pipeline to flow, and reducing the flow area between the first opening part and the second opening part when the water end outputs cold water.

65. The hot water system as claimed in claim 64, wherein: the water heating device comprises a gas water heater or a wall-mounted furnace.