CN114198526B

CN114198526B - Water return valve, water supply system without water return pipe, water supply system with water return pipe and water heater

Info

Publication number: CN114198526B
Application number: CN202111268737.8A
Authority: CN
Inventors: 巴喜亮; 梁国荣
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2024-05-24
Anticipated expiration: 2041-10-29
Also published as: CN114198526A

Abstract

The invention discloses a water return valve, a water return pipe-free water supply system and a water heater, wherein the water return valve comprises a valve body and a one-way valve, the valve body comprises four joint parts with four end parts which are intersected, the tail ends of the four joint parts extending towards different directions are opened with a first water inlet and outlet, a second water inlet and outlet, a third water inlet and outlet and a fourth water inlet and outlet, the second water inlet and outlet are always communicated with the third water inlet and outlet, and the first water inlet and outlet are always communicated with the fourth water inlet and outlet. The one-way valve is arranged between the first water inlet and the second water inlet, and when the one-way valve is opened, water in the first water inlet and the second water inlet can flow to the second water inlet in a one-way manner; when the check valve is closed, water in the first water inlet and outlet can flow to the fourth water inlet and outlet, and water in the second water inlet and outlet can flow to the third water inlet and outlet. The water return valve provided by the embodiment of the invention is simple and small in structure, various in water inlet and outlet modes, and the one-way valve can realize the circulation of hot water and the zero cold water function when opened; the check valve is closed, and water is normally used.

Description

Water return valve, water supply system without water return pipe, water supply system with water return pipe and water heater

Technical Field

The invention belongs to the technical field of water heaters, and particularly relates to a water return valve, a water supply system without a water return pipe, a water supply system with a water return pipe and a water heater.

Background

The zero cold water heater can realize the function of instant heating when the water end is opened, and improves the convenience and the comfort of water consumption of users.

In the related art, in a zero-cold water supply system without a water return pipe, a circulating loop between the zero-cold water heater and a water use end is realized by installing water return valves, the water return valves are usually arranged close to the water use end, when cold water is used by the water use end, the problem of false start of the zero-cold water heater is easily caused, and the water return valves are usually complex in structure, large in occupied space and high in installation difficulty.

In the zero cold water supply system provided with the return pipe, a return valve is arranged close to the zero cold water heater, and is communicated with a water inlet pipe of the water heater, a cold water source and the return pipe, and the return pipe is communicated with a hot water pipe of a water use end to form a circulation loop between the zero cold water heater and the water use end. However, the water return valves have complex structures, large occupied space and insufficient hot water flow.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the first aspect of the present invention aims to provide a water return valve, which is small in structure, easy to process and suitable for being used in a zero-cold water supply pipeline.

The second aspect of the invention aims to provide a water supply system without a return pipe, which is provided with the return valve.

The purpose of the third aspect of the invention is to provide a water supply system with a return pipe, which is provided with the return valve.

The fourth aspect of the invention aims to provide a water heater with the water return valve.

According to an embodiment of the invention, a water return valve includes: the valve body comprises four joint parts with the ends meeting, and each joint part extends towards different directions; the tail ends of the four interface parts are open and respectively form a first water inlet and outlet, a second water inlet and outlet, a third water inlet and outlet and a fourth water inlet and outlet, the second water inlet and outlet are always communicated with the third water inlet and outlet, and the first water inlet and outlet are always communicated with the fourth water inlet and outlet; the one-way valve is arranged between the first water inlet and the second water inlet, and when the one-way valve is opened, water in the first water inlet and the second water inlet can flow to the second water inlet in a one-way manner; when the one-way valve is closed, water in the first water inlet and outlet can flow to the fourth water inlet and outlet, and water in the second water inlet and outlet can flow to the third water inlet and outlet.

According to the water return valve provided by the embodiment of the invention, the whole structure is small, the four interface parts extending towards different directions can be respectively used for connecting different pipe sections, the pipe sections are not mutually interfered when being installed, and the occupied installation space is small when being installed. The pipe section connected to the interface portion may be communicated with the corresponding water inlet and outlet. When the check valve is closed, one of the first water inlet and the fourth water inlet and the other water outlet which are communicated with each other can be used for water inlet, and the other water inlet and the other water outlet which are communicated with each other can be used for water outlet, so that water in different interface parts can circulate and change the flow direction. When the one-way valve is opened, water in the first water inlet and outlet can flow into the second water inlet and outlet, and if the third water inlet and outlet does not discharge water, the second water inlet and outlet can discharge the water flowing into the first water inlet and outlet outwards; if the third water inlet and outlet is used for discharging water, the second water inlet and outlet can further discharge the water flowing in from the first water inlet and outlet to the third water inlet and outlet, so that various water inlet and outlet modes of the water return valve are realized.

According to some embodiments of the invention, the first axis of the first water inlet and the second axis of the second water inlet are not parallel; the second axis of the second water inlet and outlet is coaxially arranged with the fourth axis of the fourth water inlet and outlet; an included angle exists between the first axis and the fourth axis.

According to the water return valve of some embodiments of the present invention, a first runner communicated with the first water inlet and outlet, a second runner communicated with the second water inlet and outlet, a third runner communicated with the third water inlet and outlet, and a fourth runner communicated with the fourth water inlet and outlet are arranged in the valve body; the first flow passage and the fourth flow passage are intersected and communicated, and the second flow passage and the third flow passage are intersected and communicated; the valve body is provided with a backwater state and a water use state; the check valve is arranged at one side of the second flow passage, which is close to the first flow passage, and can be switched between a cut-off position and a circulation position, wherein the check valve is closed when the check valve is in the cut-off position, and the check valve cuts off the first flow passage and the second flow passage; the one-way valve being open in the flow-through position, the one-way valve communicating the first flow passage with the second flow passage; when the valve body is switched from the water use state to the water return state, the one-way valve is switched from the cut-off position to the circulation position, so that water in the first flow passage flows into the second flow passage or the third flow passage.

Optionally, the check valve is disposed at the junction of the second flow channel and the third flow channel, when the valve body is in a water-using state, the check valve seals the first flow channel and the second flow channel, and when water flows between the second flow channel and the third flow channel, at least part of the water flows through the check valve.

Optionally, a communication port of the third flow channel on the second flow channel at least partially overlaps with a valve body of the one-way valve, and the one-way valve is opened towards one end of the second water inlet and outlet.

Optionally, the check valve includes shutoff portion, holding portion and elastic component, the shutoff portion with the cover is equipped with between the holding portion the elastic component, so that shutoff portion telescopic connection is in on the holding portion, the holding portion orientation the setting of second water inlet outlet.

Optionally, the maximum cross-sectional dimension of the accommodating portion is smaller than the maximum cross-sectional dimension of the blocking portion, the one-way valve is semi-open towards one side of the second water inlet and outlet, and water in the second water inlet and outlet can bypass the accommodating portion to be communicated with water in the third water inlet and outlet.

According to some embodiments of the invention, the water return valve further comprises a steady flow piece, wherein the steady flow piece is arranged in the interface part provided with the third water inlet and outlet, and the steady flow piece comprises a steady flow core with the flow of 6-8L/min.

Optionally, the water return valve further comprises a blocking cover, and the blocking cover is arranged at the fourth water inlet and outlet.

According to an embodiment of the invention, a water supply system without a return pipe comprises: the water heater comprises a water inlet pipe and a water outlet pipe; the water-using end is connected with a hot water-using pipe and a cold water-using pipe; the water return valve of each embodiment with the steady flow piece is characterized in that the fourth water inlet and outlet are communicated with the hot water pipe, and the third water inlet and outlet are communicated with the cold water pipe; the first water inlet and outlet are communicated with the water outlet pipe through a hot water pipe, and the second water inlet and outlet are communicated with the water inlet pipe through a cold water pipe; a cold water source which is respectively communicated with the water inlet pipe and the cold water pipe; when the water heater returns water, the one-way valve is opened, hot water of the water outlet pipe flows from the first water inlet and outlet to the second water inlet and outlet, and returns to the water inlet pipe through the cold water pipe.

According to the water supply system without the water return pipe, when the water heater returns, hot water in the water outlet pipe flows into the first water inlet and outlet through the hot water pipe under the drive of relevant parts of the water heater, and water in the fourth water inlet and outlet and the third water inlet and outlet does not flow outwards at the moment, hot water flowing into the first water inlet and outlet continuously rushes into the second water inlet and outlet at the moment, the generated pressure difference can enable the one-way valve to be switched from closed to open, and the one-way valve is switched from the cut-off position to the circulation position, so that the hot water flows back to the water inlet pipe through the cold water pipe further through the second water inlet and outlet, a circulation loop is formed, and a certain zero cold water reserve is realized. When the water is needed to be used at the water using end, the water flows from the cold water pipe to the second water inlet and outlet, flows to the cold water using pipe through the third water inlet and outlet, and finally enters the water using end; the water also enters the first water inlet and outlet from the hot water pipe, flows to the fourth water inlet and outlet from the first water inlet and outlet, then enters the hot water pipe and finally enters the water end, so that the hot water at the water end can be used immediately after being opened.

According to an embodiment of the invention, a water supply system with a return pipe comprises: the water heater comprises a water inlet pipe and a water outlet pipe; the water-using end is connected with a hot water-using pipe and a cold water-using pipe, and the hot water-using pipe is communicated with the water outlet pipe through a hot water pipe; the water return valve of the embodiment comprising the blocking cover, wherein the third water inlet and the third water outlet are communicated with the water inlet pipe, and the first water inlet and the first water outlet are communicated with the hot water pipe through the water return pipe; the cold water source is communicated with the second water inlet and outlet, and is communicated with the cold water pipe through a cold water pipe; when the water heater returns water, the water of the water return pipe flows to the third water inlet and outlet through the first water inlet and outlet.

According to the water supply system with the water return pipe, when the water heater returns, hot water in the water outlet pipe enters the hot water pipe and flows into the water return pipe from the hot water pipe under the drive of relevant parts of the water heater, and then enters the first water inlet and outlet from the water return pipe, and as the water in the second water inlet and outlet does not flow outwards at the moment and the third water inlet and outlet is communicated with the water inlet pipe, pressure difference is generated among the first water inlet and outlet, the second water inlet and the third water inlet and outlet, the one-way valve is switched from closed to open, and then is switched from a cut-off position to a circulation position, so that the hot water further enters the third water inlet and outlet from the second water inlet and flows back to the water inlet pipe, and a circulation loop is formed, so that certain zero cold water storage is realized. When the water is needed at the water use end, the hot water with a certain temperature flows into the hot water use pipe from the hot water pipe and finally enters the water use end, so that the hot water at the water use end can be used immediately after being opened.

The water heater comprises the embodiment of the water return valve with the plugging cover.

According to the water heater provided by the embodiment of the invention, the water return valve with the blocking cover is arranged on the pipeline close to the water heater or the water return valve with the blocking cover is arranged in the water heater, so that the large-flow water return of the water heater with the water return pipe can be realized, the sufficient hot water quantity is ensured, and the instant heating of the hot water is realized.

Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is an exploded view of a water return valve according to some embodiments of the present invention.

Fig. 2 is a cross-sectional view of a water return valve according to some embodiments of the invention.

Fig. 3 is a schematic view of a partial enlarged structure of the region I in fig. 2.

Fig. 4 is a cross-sectional view of a water return valve with a blanking cover in other embodiments of the present invention.

Fig. 5 is a schematic view of a circulation waterway when a return valve is in a return state in a water supply system without a return pipe according to some embodiments of the present invention.

Fig. 6 is a schematic flow path diagram of a return valve in a water supply system without a return pipe according to some embodiments of the present invention.

Fig. 7 is a schematic view of a circulation waterway in a backwater state of a backwater valve in a water supply system with a backwater pipe according to some embodiments of the present invention.

FIG. 8 is a schematic flow path diagram of a return valve in a water return line system according to some embodiments of the present invention.

Reference numerals:

1000. a water return valve;

100. A valve body; 101. an interface part; 110. a first flow passage; 111. a first junction; 112. a first water inlet and outlet;

120. A second flow passage; 121. a second junction; 122. a second water inlet and outlet; 123. the second convex rib;

130. a third flow passage; 131. a communication port; 132. a third water outlet; 133. the first convex rib;

140. a fourth flow passage; 141. a third junction; 142. a fourth water inlet and outlet;

150. A transition chamber;

200. a one-way valve; 210. a blocking part; 211. a connecting rod; 220. an accommodating portion; 230. an elastic member;

300. a clamping piece; 400. a filter; 500. a steady flow member; 600. a blanking cover;

2100. a water supply system without a return pipe; 2200. a water return pipe water supply system is arranged;

2010. A water heater; 2011. a water inlet pipe; 2012. a water outlet pipe; 2013. driving a pump;

2020. a water end; 2021. a hot water pipe; 2022. a cold water pipe; 2023. a water mixing valve;

2030. A cold water source; 2041. a hot water pipe; 2042. a cold water pipe; 2043. and a water return pipe.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The water return valve 1000 according to the embodiment of the present invention is described below with reference to the drawings, and the water return valve 1000 according to the present invention has a compact structure, is simple to manufacture, uses little material, and can be used in a water supply system having a zero-water heater.

A water return valve 1000 according to an embodiment of the present invention, as shown in fig. 1, 2 and 4, includes: a valve body 100 and a check valve 200.

As shown in fig. 1, the valve body 100 includes four interface portions 101 where the ends meet, which are respectively referred to as a first interface portion, a second interface portion, a third interface portion, and a fourth interface portion for convenience of explanation; wherein, the tail end of the first interface part is open and provided with a first water inlet and outlet 112; the end of the second interface part is open and provided with a second water inlet and outlet 122, the end of the third interface part is open and provided with a third water inlet and outlet 132, and the end of the fourth interface part is open and provided with a fourth water inlet and outlet 142. The ends of the four interface parts 101 meet, and may be the ends of the first interface part, the second interface part, the third interface part and the fourth interface part meet each other, or the common ends of the first interface part, the second interface part, the third interface part and the fourth interface part form a meeting.

The four interface portions 101 extend in different directions, for example, forward, backward, leftward and rightward, that is, the extending directions between two adjacent interface portions 101 form an included angle, so that the ends of the respective interface portions 101, which are provided with water inlet and outlet ports, do not intersect with each other, and a certain installation space is provided between the two adjacent interface portions 101.

The second water inlet 122 is always communicated with the third water inlet 132, that is, the water in the second water inlet 122 or the third water inlet 132 can flow mutually to form a first communicating channel.

The first water inlet 112 and the fourth water inlet 142 are always communicated, that is, the water in the first water inlet 112 and the fourth water inlet 142 can flow mutually and form another communicated second channel.

The check valve 200 disposed between the first water inlet 112 and the second water inlet 122 can control the two channels to work independently or to communicate with each other. When the check valve 200 is opened, water in the first water inlet/outlet 112 may flow unidirectionally to the second water inlet/outlet 122, so that water in the second passage may flow toward the first passage, but water in the second passage may not flow back to the first passage.

When the check valve 200 is closed, the first channel and the second channel are both independent channels, and at this time, water in the first water inlet/outlet 112 can flow to the fourth water inlet/outlet 142, so that the fourth water inlet/outlet 142 is used as the water outlet side of the second channel. The water in the second water inlet/outlet 122 may flow to the third water inlet/outlet 132, so that the third water inlet/outlet 132 serves as the water outlet side of the first channel. It should be noted that, whether the check valve 200 is opened or closed, the check valve 200 does not interfere with the communication state of the first channel, and the check valve 200 does not interfere with the communication state of the second channel.

As can be seen from the above structure, in the water return valve 1000 according to the embodiment of the present invention, one ends of the connector portions 101 are arranged to intersect with each other so that the internal flow channels are partially communicated, and the other ends of the connector portions 101 are arranged away from each other and extend in different directions, so that the four connector portions 101 can be respectively used for connecting different pipe sections, and the pipe sections are not mutually interfered when being installed; the pipe sections connected to each of the interface portions 101 may communicate with the corresponding open-ended water inlet and outlet. Therefore, the whole structure of the water return valve 1000 is small and exquisite, the size is greatly reduced, and the material consumption is low during processing and manufacturing; the occupied installation space is small, and the connection is convenient.

When the check valve 200 is closed, one of the first water inlet 122 and the fourth water inlet 142 which are communicated with each other can be used for water inlet and the other one can be used for water outlet, and one of the second water inlet 122 and the third water inlet 132 can be used for water inlet and the other one can be used for water outlet, so that water in different interface parts 101 can circulate and change the flow direction.

When the check valve 200 is opened, water in the first water inlet 112 may flow into the second water inlet 122, and if the third water inlet 132 does not discharge water, the second water inlet 122 may discharge the water flowing into the first water inlet 112. When the third water inlet 132 discharges water, the second water inlet 122 can further discharge the water flowing in from the first water inlet 112 to the third water inlet 132, thereby realizing various water inlet and outlet modes of the water return valve 1000.

It can be appreciated that, compared with the water return valve in the prior art, the water return valve 1000 of the invention has simple overall structure, less material consumption during processing and manufacturing and easy processing; the state switching is convenient, the installation is simple, and the zero cold water supply can be realized; the water return valve 1000 of the invention can be used in various water supply systems, so that the water supply system can normally use water, and is particularly suitable for storing zero cold water and is convenient for water consumption.

Optionally, the first interface part, the second interface part, the third interface part and the fourth interface part are integrally formed and connected, so that the interface parts are formed into a whole, and the structure is compact and firm, the appearance is attractive, and the interface parts are not easy to break when in use; in the process of processing and manufacturing, the same die can be selected for processing and manufacturing each water return valve 1000, the processing is convenient, the batch error is small, the consistency after processing and forming is high, the relative position of each water inlet and outlet is stable, and each interface part 101 of the water return valve 1000 is not easy to be shifted in the using process.

Of course, in other examples, the first interface portion, the second interface portion, the third interface portion, and the fourth interface portion may be connected to each other by means of subsequent welding and splicing, so that each interface portion 101 may be separately processed, and the mold may be simplified conveniently.

Optionally, the outside of each interface portion 101 is provided with threads to facilitate connection of the respective interface portion 101 in a pipe.

In other examples, the interface 101 may not be threaded, but rather may be an interference fit with the pipe.

Alternatively, the water return valve 1000 of the present application may be manufactured using a metal material or using engineering plastics, so that the entire water return valve 1000 is easy to process and has sufficient strength and pressure resistance.

In a specific example, as shown in fig. 2 or 4, the first water inlet/outlet 112 is a hot water inlet, denoted as a, which can be used to charge hot water at a higher temperature or warm water at an elevated temperature; the second water inlet/outlet 122 is a cold water inlet, denoted as D, which can be used for filling cold water or for draining water at a lower temperature; the third water inlet/outlet 132 is a cold water outlet, designated as C, which can be used to discharge cold water or warm water; the fourth water inlet and outlet 142 is a hot water outlet, denoted B, which can be used for discharging hot water, and can be plugged in appropriate situations.

Then in the above example, as shown in fig. 5 and 6, the return valve 1000 is disposed near the water use end 2020, and when the check valve 200 is closed, the hot water in the hot water inlet can directly flow toward the hot water outlet to discharge the hot water for the user to use; the cold water in the cold water inlet can be directly discharged to the cold water outlet for a user to use the cold water, so that the requirements of cold water and hot water at the water use end 2020 are met. When the check valve 200 is opened, the hot water in the hot water inlet may be further returned to the water heater 2010 through the cold water inlet to be heated, resulting in zero circulation heating of cold water and sufficient supply.

As shown in fig. 7 and 8, the water return valve 1000 is disposed close to the water heater 2010, and when the check valve 200 is closed, the cold water in the cold water inlet can be directly discharged to the cold water outlet and is sent to the water use end 2010 after being heated by the water heater 2010. When the check valve 200 is opened, water in the return pipe 2043 enters the valve body 100 through the hot water inlet and is introduced into the cold water outlet through the check valve 200, and the water in the cold water outlet is heated by the water heater 2010 and then is introduced into the hot water pipe 2041 and the return pipe 2043 again, thereby forming zero circulation heating and sufficient supply of cold water.

Advantageously, the hot water inlet and the hot water outlet are used as hot water ends, and the cold water inlet and the cold water outlet are used as cold water ends, and the check valve 200 is arranged between the hot water ends and the cold water ends, so that the hot water and the cold water can be isolated and not interfered with each other under the condition that water is needed by the water use end 2020, and the function that the water return valve 1000 meets the foundation is ensured. That is, when the water-using end 2020 needs water, the water in the first and second channels is not mixed.

Optionally, the first axis of the first water inlet 112 is not parallel to the second axis of the second water inlet 122, that is, the first axis and the second axis have a certain angle, which may be an acute angle, a right angle or an obtuse angle. So that the pipeline connected with the first water inlet and outlet 112 and the pipeline connected with the second water inlet and outlet 122 can be respectively oriented to different directions, thereby being convenient for adapting to various installation occasions and being convenient for pipe arrangement and pipe running.

For example, as shown in fig. 1,2 and 4, the included angle between the first axis and the second axis is a right angle, that is, the first axis is perpendicular to the second axis, so that the first water inlet 112 and the second water inlet 122 can be respectively connected to corresponding pipes in different directions, so that sufficient space is provided for the connection of each pipe, and each pipe is prevented from being squeezed together. Meanwhile, when the check valve 200 is opened, the water flow entering the valve body 100 from the first water inlet 112 can further enter the second water inlet 122 through reversing, so that the setting position of the check valve 200 is more flexible, the water pressures at two sides of the check valve 200 can meet sufficient pressure difference under certain conditions, and the channel from the first water inlet 112 to the second water inlet 122 can be effectively blocked.

Optionally, an included angle exists between the first axis of the first water inlet 112 and the fourth axis of the fourth water inlet 142, where the included angle is an acute angle, a right angle or an obtuse angle, for example, in a specific example, as shown in fig. 1, 2 and 4, the included angle between the first axis and the fourth axis is a right angle, so that the first water inlet 112 and the fourth water inlet 142 can be connected to corresponding pipes respectively towards different directions, so as to provide sufficient space for the connection of each pipe, and enable the upstream side of the check valve 200 to accumulate sufficient water pressure.

Advantageously, the second axis of the second water inlet 122 is arranged coaxially with the fourth axis of the fourth water inlet 142, that is to say, the second axis and the fourth axis are collinear, so that the second water inlet 122 and the fourth water inlet 142 face in opposite directions, for example, when the second water inlet 122 faces downward, the fourth water inlet 142 faces upward, or vice versa; for example, when the second water inlet 122 is facing left, the fourth water inlet 142 is facing right, and vice versa; for another example, when the second water inlet 122 faces forward, the fourth water inlet 142 faces backward, and vice versa. Thus, the pipeline connected with the second water inlet and outlet 122 and the pipeline connected with the fourth water inlet and outlet 142 can be arranged in parallel, so that the pipe arrangement and the installation space utilization are facilitated. Of course, the orientation of each water inlet and outlet in the application can be correspondingly adjusted according to the installation position required by the actual pipeline or the reserved installation space.

In a specific example, the first axis coincides with the axis of the first joint portion, so that the first water inlet and outlet 112 is arranged in the middle of the first joint portion, the partial strength of the first joint portion is prevented from being insufficient, the uniform and stable structure of the first joint portion is ensured, and the stable inner wall of the water pressure applied to the inner wall of the first joint portion after water filling is not easy to break. The second axis coincides with the axis of the second interface portion, so that the second water inlet and outlet 122 is arranged in the middle of the second interface portion, the partial strength of the second interface portion is prevented from being insufficient, the uniform and stable structure of the second interface portion is ensured, and the stable inner wall of the water pressure received by the inner wall of the second interface portion is not easy to break after water filling. The third axis coincides with the axis of the third interface portion, so that the third water inlet and outlet 132 is arranged in the middle of the third interface portion, the partial strength of the third interface portion is prevented from being insufficient, the uniform and stable structure of the third interface portion is ensured, and the stable inner wall of the water pressure received by the inner wall of the third interface portion is not easy to break after water filling. The fourth axis coincides with the axis of the fourth interface portion, so that the fourth water inlet and outlet 142 is arranged in the middle of the fourth interface portion, the partial strength of the fourth interface portion is prevented from being insufficient, the uniform and stable structure of the fourth interface portion is ensured, and the stable inner wall of the water pressure received by the inner wall of the fourth interface portion is not easy to break after water filling.

In some embodiments of the present invention, as shown in fig. 2 and 4, the valve body 100 is provided therein with a first flow passage 110 (communicating with the first water inlet/outlet 112), a second flow passage 120 (communicating with the second water inlet/outlet 122), a third flow passage 130 (communicating with the third water inlet/outlet 132), and a fourth flow passage 140 (communicating with the fourth water inlet/outlet 142), the first flow passage 110 and the fourth flow passage 140 intersect and communicate, the third flow passage 130 and the second flow passage 120 intersect and communicate, and the valve body 100 has a backwater state and a water use state. The backwater state here corresponds to backwater of the rear Wen Reshui device 2010; and the water consumption state corresponds to the water consumption of the water consumption end 2020 in the water supply system.

The check valve 200 is disposed at one side of the second flow path 120 near the first flow path 110, the check valve 200 is switchable between a blocking position, in which the check valve 200 is closed, and a flow-through position, in which the check valve 200 blocks the first flow path 110 from the second flow path 120; in the flow-through position, the check valve 200 is open and the check valve 200 communicates the first flow passage 110 with the second flow passage 120. The check valve 200 in the present invention can control the flow direction of the water flow to be the set direction, but not the opposite direction to the set direction.

When the valve body 100 is switched from the water use state to the water return state, the check valve 200 is switched from the blocking position to the flow position, and thus is switched from the closing state to the opening state, so that the water in the first flow passage 110 flows into the second flow passage 120 or the third flow passage 130. That is, when the valve body 100 is switched to the backwater state, the check valve 200 is triggered to the switching position, and when the valve body 100 is in the water use state, the check valve 200 is in the blocking position, and at this time, the water in the first flow passage 110 cannot flow into the second flow passage 120 or the third flow passage 130; when the valve body 100 is in the backwater state, the check valve 200 is in a flow-through position in which water in the first flow passage 110 can flow into the second flow passage 120 or the third flow passage 130.

According to the water return valve 1000 of the embodiment of the present invention, under the condition of water return, the water return valve 200 is driven by external force, for example, by an electric signal or by water pressure difference, so that the water in the first flow channel 110 is flushed to the second flow channel 120 or further enters the third flow channel 130 from the second flow channel 120, and thus the hot water is guided into the circulation flow channel by the water return valve 1000, and the functions of hot water circulation and zero cold water are realized.

In the water condition, the check valve 200 is in the cut-off position, the first flow channel 110 and the second flow channel 120 are not communicated with each other, and the first flow channel 110 and the third flow channel 130 are also not communicated with each other, so that water in the first flow channel 110 does not flow into the second flow channel 120 or the third flow channel 130, and cold water or stored hot water with a certain temperature can flow into the third flow channel 130 from the second flow channel 120, or hot water with a certain temperature can flow into the water end 2020 from the first flow channel 110, thereby the water system is used to work normally, and water instant heating is realized.

The water return valve 1000 of the invention has the advantages of compact whole structure, easy processing and manufacturing, convenient installation and being applicable to a system which needs to provide zero cold water.

Optionally, a check valve 200 is provided at the junction of the third flow path 130 and the second flow path 120, the check valve 200 sealing off the first flow path 110 and the second flow path 120 when the valve body 100 is in a water condition, and the water flow at least partially passing through the check valve 200 when flowing between the third flow path 130 and the second flow path 120. In these examples, regardless of the state of the check valve 200, the check valve 200 always does not form an obstruction to the communication of the third flow passage 130 and the second flow passage 120, and water therebetween is always communicated. The state of the check valve 200 will change the communication between the first flow channel 110 and the second flow channel 120, so that the water flow can flow from the first flow channel 110 into the second flow channel 120 when the check valve 200 is opened, and the water flow cannot move from the first flow channel 110 to the second flow channel 120 when the check valve 200 is closed.

In some embodiments of the present invention, as shown in fig. 2 and 4, a transition chamber 150 is provided in the valve body 100, one end of the first flow passage 110 and one end of the second flow passage 120 are both connected to the transition chamber 150, the third flow passage 130 is connected to a sidewall of the second flow passage 120, and the check valve 200 is disposed at one end of the second flow passage 120 near the transition chamber 150. In these examples, by providing the transition chamber 150, it is easier to communicate the first flow passage 110 with the second flow passage 120, and the water in the first flow passage 110 is allowed to further flow into the transition chamber 150, a certain water flow pressure difference is provided for opening the check valve 200, so that the check valve 200 can be triggered to switch to a circulation state when the valve body 100 is in a backwater state, and the water in the transition chamber 150 flows into the second flow passage 120.

In some examples, the transition chamber 150 is a separate chamber formed in the valve body 100, so that the water in the first flow channel 110 flows into the second flow channel 120 with sufficient water, a certain water pressure can be formed, and the water flowing process can be more stable.

Advantageously, the first flow channel 110, the second flow channel 120, the third flow channel 130 and the fourth flow channel 140 are all direct flow channels, and the flow channel inner diameter of the first flow channel 110 is the same as the aperture of the first water inlet/outlet 112, the flow channel inner diameter of the second flow channel 120 is the same as the aperture of the second water inlet/outlet 122, the flow channel inner diameter of the third flow channel 130 is the same as the aperture of the third water inlet/outlet 132, and the flow channel inner diameter of the fourth flow channel 140 is the same as the aperture of the fourth water inlet/outlet 142. Thereby keeping the flow area of each flow channel within a preset range and facilitating processing and manufacturing; when water flows in each flow passage, the straight flow passage can also lighten the scouring of liquid to the flow passage wall, thereby being beneficial to the long-term use of the water return valve 1000.

In some examples, portions of the first flow passage 110 are configured as transition chambers 150, and ends of the second flow passage 120 are in vertical communication with the first flow passage 110 and are closed off by a one-way valve 200 at the junction between the second flow passage 120 and the first flow passage 110. So that the water in the first flow passage 110 does not flow into the second flow passage 120 in the state of water of the valve body 100; in the backwater state of the valve body 100, the water in the first flow passage 110 flows into the second flow passage 120 or further flows into the third flow passage 130.

In other examples, portions of the second flow passage 120 are configured as transition chambers 150, with the ends of the first flow passage 110 meeting the first flow passage 110 perpendicularly, and a one-way valve 200 is provided in the second flow passage 120 near the intersection between the second flow passage 120 and the first flow passage 110 to shut off. So that the water in the first flow passage 110 does not flow into the second flow passage 120 in the state of water of the valve body 100; in the backwater state of the valve body 100, the water in the first flow passage 110 flows into the second flow passage 120 or further flows into the third flow passage 130.

Alternatively, as shown in fig. 2 and 4, the end of the first flow passage 110 near the transition chamber 150 forms a first junction 111, the flow passage wall of the second flow passage 120 extends to the first junction 111, the end of the second flow passage 120 near the transition chamber 150 forms a second junction 121, and in the closed position, the check valve 200 seals the second junction 121. That is, the check valve 200 does not extend into the transition chamber 150, and the check valve 200 does not occupy the space of the transition chamber 150, but the check valve 200 is switched to the circulation position after sufficient water flows into the transition chamber 150 in the first flow passage 110, so that water in the first flow passage 110 can stably flow into the second flow passage 120. In a specific example, the caliber of the first junction 111 is smaller than that of the first water inlet/outlet 112, that is, the outlet portion of the first flow passage 110 is shielded by the flow passage wall of the second flow passage, so that the water pressure and the water flow velocity flowing from the first junction 111 into the transition chamber 150 can be increased.

Alternatively, as shown in fig. 2 and 4, the communication port 131 of the third flow passage 130 in the second flow passage 120 at least partially overlaps the valve body of the check valve 200, and the check valve 200 is opened toward one end of the second water inlet/outlet 122, in these examples, one end of the check valve 200 is semi-open, and the other end is both closable and openable. The side of the second water inlet 122 facing to the opening can enable the water flow to pass smoothly without blocking the water flow between the third flow channel 130 and the second flow channel 120, so that the cross-sectional area of the flow channel is ensured to be large enough, which is beneficial to greatly reducing the overall size of the water return valve 1000, and the water flow communication state between the third flow channel 130 and the second flow channel 120 is not affected no matter the check valve 200 is in the cut-off position or the circulation position. A portion of the third flow path 130 is blocked by the check valve 200 so that the water flow in the first flow path 110 does not flow into the second flow path 120 when the check valve 200 is in the closed position.

Advantageously, as shown in fig. 2 and 4, the third flow channel 130 at least partially overlaps with the projection of the first flow channel 110 in a direction perpendicular to the axial direction of the one-way valve 200. That is, the third flow passage 130 is collinear with the axis of the first flow passage 110, and the appearance of the entire valve body 100 is disposed in a crisscross arrangement; or the third flow passage 130 is parallel to the axis of the first flow passage 110 so that the two flow passages are offset, the overall valve body 100 is generally cross-shaped in appearance, but not strictly cross-shaped.

In either of the above-described arrangements of the third flow path 130 and the first flow path 110, as shown in fig. 2 and 4, the third flow path 130 is provided with a first bead 133 extending in the opening direction of the check valve 200 on the flow path side wall on the side close to the check valve 200; the first flow passage 110 is provided with a second bead 123 extending in the closing direction of the check valve 200 on the flow passage side wall on the side close to the check valve 200.

The first and second ribs 133 and 123 may be such that the third flow passage 130 and the first flow passage 110 are not directly connected regardless of arrangement, but are separated by the check valve 200. That is, the check valve 200 can be switched to different positions, such as the aforementioned blocking position and the flow-through position, by moving relative to the first bead 133 and the second bead 123, and when the check valve 200 is in the blocking position, the first bead 133, the second bead 123 and the check valve 200 cooperate to block the third flow passage 130 and the first flow passage 110, so that the water flow in the first flow passage 110 does not flow into the second flow passage 120, and does not flow into the third flow passage 130.

When the check valve 200 is in the circulation position, the first ribs 133 and the second ribs 123 further guide the water flow, so that the water flow passes through the check valve 200 and enters the third flow passage 130 or the second flow passage 120, thereby forming different water inlet and outlet modes.

Meanwhile, in the above example, the third flow channel 130 may be closer to the transition chamber 150 and more coaxial with the first flow channel 110, at this time, the water return valve 1000 is more compact and has a smaller structure, and the water flow can flow into the third flow channel 130 more quickly when the check valve 200 is opened by adjusting the lengths of the first bead 133 and the second bead 123, without staying in the second flow channel 120 for too much time, so that the cold water in the second flow channel 120 and the water in the first flow channel 110 can be effectively prevented from being more mixed in part of the water inlet and outlet circulation flow channel (for example, in the water return state of the water heater 2010 with the water return pipe water supply system 2200, the zero cold water circulating and heating in the water heater 2010 can be led into the third flow channel 130 from the first flow channel 110 more quickly without being excessively mixed with the cold water in the second flow channel 120).

Alternatively, as shown in fig. 2 and 4, the first ribs 133 and the second ribs 123 are disposed on a side close to the transition chamber 150 and on the same side of the check valve 200, and serve as a partial channel when the check valve 200 is blocked, so that the check valve 200 is more convenient to be disposed, and the check valve 200 is easier to block the first flow channel 110 and the second flow channel 120, and the first flow channel 110 and the third flow channel 130.

In some specific examples, the first rib 133 is an extension of a portion of the flow channel wall of the fourth flow channel 140, the second rib 123 is an extension of a portion of the flow channel wall of the second flow channel 120, and the extending directions of the first rib 133 and the second rib 123 are opposite, and the projections of the first rib 133 and the second rib 123 on the axis perpendicular to the check valve 200 are at least partially overlapped, so that the first rib 133 shields the communication opening 131 between the third flow channel 130 and the second flow channel 120, and the opening size of the communication opening 131 is smaller than the flow channel cross-sectional size of the third flow channel 130; the second ribs 123 are blocked at the first junction 1111 of the first flow channel 110 and the transition cavity 150, the opening size of the first junction 1111 is smaller than the flow channel cross section size of the first flow channel 110, under the condition that the overall compactness of the water return valve 1000 is ensured, water in the first flow channel 110 can smoothly flow out towards the transition cavity 150, water in the second flow channel 120 can smoothly flow towards the third flow channel 130, and the one-way valve 200 does not block the flow of water between the third flow channel 130 and the second flow channel 120 all the time.

Advantageously, the first rib 133 and the second rib 123 are provided with a groove on the side facing each other, in which the end face of the check valve 200 is engaged, so that one end of the check valve 200 does not move axially.

Optionally, as shown in fig. 1,2 and 4, the water return valve 1000 further includes a clip 300, and an end of the check valve 200 remote from the second junction 121 is connected in the second flow channel 120 by the clip 300, so that a portion of the check valve 200 is fixed relative to the second flow channel 120, and cannot be flushed to other positions by water flowing through the portion, so as to ensure that the check valve 200 is always kept effective.

In some specific examples, the clip 300 is a clip spring, which is assembled at one end of the check valve 200 and is snapped into the flow channel wall of the second flow channel 120. For example, the runner wall can be provided with a matching groove or a boss so that the clamp spring is limited to a specific position. In other examples, the clip 300 may also be a clip provided at one end of the check valve 200, which is not particularly limited herein.

Alternatively, as shown in fig. 2 and 3, the check valve 200 includes a blocking portion 210, a receiving portion 220, and an elastic member 230, where the elastic member 230 is sleeved between the blocking portion 210 and the receiving portion 220, so that the blocking portion 210 is telescopically connected to the receiving portion 220, and the receiving portion 220 is disposed towards the second water inlet 122. The accommodating part 220 is used for supporting the elastic member 230 and defining the maximum movable position of the blocking part 210; the blocking portion 210 is a main blocking member, and can block or release the channel between the first water inlet 112 and the second water inlet 122 under the action of the elastic member 230.

Further, the elastic member 230 can drive the blocking portion 210 to move away from the accommodating portion 220, so that the blocking portion 210 is blocked between the first water inlet 112 and the second water inlet 122. When the elastic member 230 moves in a direction away from the accommodating portion 220, the elastic member 230 stretches or resets, and the blocking portion 210 drives and blocks the channel between the first water inlet 112 and the second water inlet 122; when the elastic member 230 is compressed, the elastic member 230 moves toward the direction approaching the accommodating portion 220, and the blocking portion 210 opens the passage between the first water inlet 112 and the second water inlet 122.

More specifically, the receiving part 220 is connected in the second flow path 120. That is, when the blocking portion 210 receives the driving force of the water flow, the elastic member 230 contracts, so that the blocking portion 210 contracts and accumulates with respect to the accommodating portion 220, and at this time, the blocking portion 210 avoids the second junction 121, and the check valve 200 is in the flowing position. When the blocking portion 210 loses the driving force of the water flow, the contracted elastic member 230 releases the force to push the blocking portion 210 to the second junction 121 again, and the check valve 200 is at the blocking position. During the telescopic movement of the blocking portion 210, the receiving portion 220 is always stably defined in the second flow passage 120 and supports the elastic member 230.

Optionally, the elastic member 230 is a rectangular spring, a conical surface is formed on one side of the plugging portion 210 facing the second intersection 121, a connecting rod 211 is disposed on one side of the plugging portion 210 facing the accommodating portion 220, the connecting rod 211 is disposed in the accommodating portion 220, the elastic member 230 is sleeved on the connecting rod 211, one end of the elastic member 230 is connected to the bottom of the plugging portion 210, the other side of the elastic member 230 contacts the plugging portion 210, and when the plugging portion 210 moves toward the accommodating portion 220, the elastic member 230 is compressed. The elastic member 230 provided on the connecting rod 211 is contracted stably, so that the force transmission of the elastic member 230 is stable, and the sealing portion 210 is beneficial to tightly sealing and stably communicating the second junction 121.

Of course, in other examples, the elastic member 230 may be a torsion spring, one end of the torsion spring is connected to the blocking portion 210, the other end of the torsion spring is connected to the accommodating portion 220, and when the blocking portion 210 moves towards the accommodating portion 220, the torsion spring stores force; when the blocking part 210 loses external driving force, the torsion spring releases the force to drive the blocking part 210 to return to the second junction 121, so that the check valve 200 is in the blocking position. Or the elastic member 230 may be a spring, one end of the spring is connected to the accommodating portion 220, and the other end of the spring is connected to the blocking portion 210.

Advantageously, a sealing ring is provided at the second junction 121 on the side facing the blocking portion 210, the blocking portion 210 being fitted on the sealing ring to promote the sealing performance of the check valve 200 in the closed position.

Advantageously, the outer diameter of the receiving portion 220 is at least partially smaller than the inner diameter of the second flow channel 120, and water in the second flow channel 120 can bypass the receiving portion 220 and enter the third flow channel 130, that is, the check valve 200 does not interfere with the communication relationship between the third flow channel 130 and the second flow channel 120, so long as the water in the second flow channel 120 can always enter the third flow channel 130 when the water is required to exit from the third flow channel 130.

More specifically, the maximum cross-sectional dimension of the receiving portion 220 is smaller than the maximum cross-sectional dimension of the blocking portion 210, and one side of the check valve 200 facing the second water inlet 122 is semi-open, so that water in the second water inlet 122 can bypass the receiving portion 220 to communicate with water in the third water inlet 132. The adoption of the check valve 200 can greatly improve the convenience of water circulation between the third flow channel 130 and the second flow channel 120, and the arrangement positions of the check valve 200 and the third flow channel 130 are more flexible, so that the invention is beneficial to improving the structural compactness of the whole water return valve 1000, increasing the diversity of water inlet and outlet forms and improving the reliability of water inlet and outlet control.

In other examples, the accommodating portion 220 is provided with an avoidance channel, and the avoidance channel is communicated with the third flow channel 130 and the second flow channel 120, so that the third flow channel 130 and the second flow channel 120 are always communicated.

Alternatively, the check valve 200 adopts a half-flow regulating valve, one end of the check valve 200 can realize the stop of the second flow passage 120, and the other end of the check valve 200 is completely communicated with the second flow passage 120, so that the internal water flow is not disturbed. And can ensure sufficient water flow, so that the whole size of the valve body 100 is smaller, the materials are less, and the installation is convenient.

In some embodiments of the present invention, as shown in fig. 1,2, 3 and 4, the water return valve 1000 further includes a filter 400, wherein the filter 400 is disposed in the first flow passage 110, and when water is introduced into the first flow passage 110, the filter 400 can trap impurities in the water flowing through the first flow passage 110, thereby improving the quality of the water flowing through the circulation flow passage or improving the quality of the water flowing into the water heater 2010, and preventing the impurities from blocking the internal components to affect the water flow. The filter 400 may also disperse the water entering the transition chamber 150 into multiple streams, which may facilitate a smoother and more stable water flow.

Optionally, the filter 400 is a water filtering net, the axis of the filter 400 coincides with the axis of the first flow channel 110, and the filter 400 has a mesh structure with one side protruding, so as to increase the water filtering area of the filter 400, and not affect the water flow rate in the first flow channel 110.

Optionally, the filter 400 has a cylindrical structure with a spherical top, one end of the filter 400 abuts against the first junction 111, and the other end of the filter 400 abuts against the inner wall of the first flow channel 110, so that the filter is conveniently arranged in the first flow channel 110, and the maximum efficiency of purifying the inflow water in the first flow channel 110 is realized.

In some specific examples, as shown in fig. 3, when a portion of the flow channel wall of the second flow channel 120 extends into the first junction 111 (the portion of the flow channel wall may also be the second rib 123), at this time, one end of the filter 400 may be abutted against the portion of the flow channel wall of the second flow channel 120, so as to implement limiting of one end of the filter 400.

In some embodiments of the present invention, as shown in fig. 1 and 2, the water return valve 1000 further includes a flow stabilizing member 500, where the flow stabilizing member 500 is disposed in the interface portion provided with the third water inlet/outlet 132, more specifically, the flow stabilizing member 500 is disposed in the third flow channel 130, where the flow stabilizing member 500 is disposed, so that the flow rate and the flow velocity of water flowing through the third flow channel 130 can be effectively controlled under different water pressures, and erroneous judgment of the system caused by excessive water pressure in the third flow channel 130 can be prevented. When the flow stabilizing member 500 is applied to the water supply system 2100 without the return pipe, the flow of water in the third flow passage 130 can be kept within a certain range, so that the flow detected by the water heater 2010 is lower than the starting flow, and the water pressure of the water heater 2010 caused by excessively high water pressure when cold water is used in the water use end 2020 can be effectively controlled. Meanwhile, the flow stabilizing member 500 can further reduce the water flow noise when the cold water at the water use end 2020 is discharged. In these examples, the water return valve 1000 is adapted to be positioned proximate the water use end 2020.

Alternatively, in other examples, as shown in fig. 4, the third flow passage 130 may not be provided with the flow stabilizer 500, so that the water inlet and outlet amount of the water heater 2010 is reliably ensured. In these examples, the water return valve 1000 is adapted to be positioned proximate to the water heater 2010.

Optionally, the flow stabilizing member 500 may be a flow stabilizing ring, and the flow of the flow stabilizing core in the flow stabilizing ring is 6-8L/min, so that the water amount is stabilized within the range of 6±1L/min, the cold water flow is not too high, the cold water end pressure is not too low, and the pressure difference is not formed, so that the water flowing into the cold water end from the hot water end is too large, thereby reliably ensuring the flow stabilizing effect and avoiding the false start of the water heater 2010.

The structure and the working principle of the current stabilizer 500 in the present invention are all well known to those skilled in the art, and are not described herein.

In some embodiments of the present invention, as shown in fig. 2 and 4, the fourth flow channel 140 is always in communication with the first flow channel 110. That is, when the check valve 200 is at the closed position, water in the first flow path 110 may enter the fourth flow path 140, for example, hot water may directly flow into the fourth flow path 140 through the first flow path 110, and then flow from the fourth flow path 140 to the water end 2020.

In the example where the fourth flow channel 140 is not required to be connected to the outside, as shown in fig. 4, the water return valve 1000 further includes a plug cover 600, where the plug cover 600 is disposed at the fourth water inlet/outlet 142, and more specifically, the plug cover 600 is disposed on the fourth water inlet/outlet 142 at one end of the fourth flow channel 140 far from the first flow channel 110, so that a certain water storage space can be formed between the first flow channel 110 and the fourth flow channel 140, for example, the aforementioned transition cavity 150 can be formed, which is more beneficial to the opening of the one-way valve 200.

Optionally, as shown in fig. 2 and 4, a third junction 141 is formed on a side of the fourth flow channel 140 facing the transition chamber 150, and the third junction 141 faces the second junction 121, so as to facilitate the water in the transition chamber 150 to flow into the second flow channel 120 further.

In some specific examples, a portion of the fourth flow passage 140 forms the transition chamber 150, the first flow passage 110 is vertically connected to the fourth flow passage 140, and a portion of the flow passage wall of the fourth flow passage 140 is connected to the flow passage wall of the second flow passage 120, so that the transition chamber 150 does not need to be separately opened in the valve body 100.

Advantageously, the first flow channel 110 and the second flow channel 120 are vertically arranged, the third flow channel 130 and the second flow channel 120 are vertically crossed, the fourth flow channel 140 and the first flow channel 110 are vertically crossed and connected, the axis of the fourth flow channel 140 coincides with the axis of the second flow channel 120, the axis of the first flow channel 110 and the axis of the third flow channel 130 are parallel, that is, the first intersection 111 of the first flow channel 110 is not right opposite to the intersection of the third flow channel 130 and the second flow channel 120, but is completely staggered, the final water return valve 1000 is in a roughly cross structure, and has the advantages of small integral structure, convenience in installation, convenience in water flow and reliability in control.

In the description of the present invention, features defining "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of such features for distinguishing between the described features, no sequential or no light or heavy fraction.

In summary, the water return valve 1000 according to the embodiment of the present invention optimizes the internal flow channel structure of the valve body 100, optimizes the external structure of the valve body 100, greatly reduces the size, reduces the material consumption, optimizes the fittings, and improves the service performance of the water return valve 1000 on the premise of ensuring the pressure resistance and convenient installation of the water return valve 1000.

It should be noted that, the positions of A, B, C, D in the drawings in the specification are the same, so that it is convenient to identify which position of the water return valve 1000 is connected to the water supply system 2100 without water return pipe or 2200 with water return pipe, and also to identify the flow direction of the water flow.

The non-return water supply system 2100 according to the embodiment of the present invention is described below with reference to the drawings.

A water supply system 2100 without return pipe according to an embodiment of the present invention, as shown in fig. 5 and 6, includes: the water heater 2010, the water use end 2020, the water return 1000, and the cold water source 2030, the water return 1000 is an embodiment of the water return 1000 with the fourth flow path 140 described above.

As shown in fig. 5 and 6, the water heater 2010 includes a water inlet pipe 2011 and a water outlet pipe 2012, wherein the water inlet pipe 2011 may be used to feed water to the water heater 2010, and the water outlet pipe 2012 may discharge heated hot water of the water heater 2010 to the outside.

The water end 2020 is connected to the hot water pipe 2021 and the cold water pipe 2022. The water-using terminal 2020 may be a terminal water-using device such as a household sink, shower device, bath device, etc. The hot water line 2021 may provide hot water to the water use end 2020, and the cold water line 2022 may provide cold water to the water use end 2020.

As shown in fig. 2 and 5, the fourth water inlet/outlet 142 is connected to the hot water pipe 2021, and the third water inlet/outlet 132 is connected to the cold water pipe 2022; the first water inlet/outlet 112 is communicated with the water outlet pipe 2012 by a hot water pipe 2041, and the second water inlet/outlet 122 is communicated with the water inlet pipe 2011 by a cold water pipe 2042.

The cold water source 2030 is respectively connected to the water inlet pipe 2011 and the cold water pipe 2042, and the cold water source 2030 may be a main tap water pipe or a water storage tank or a regeneration tank, so long as sufficient water for life and bath can be provided.

As shown in fig. 5, when the water heater 1000 returns water, the check valve 200 is opened, and the hot water of the outlet pipe 2012 flows from the first water inlet/outlet 112 to the second water inlet/outlet 122 and returns to the inlet pipe 2011 through the cold water pipe 2042.

As can be seen from the above structure, when the water heater 2010 is backwashed, the hot water in the water outlet pipe 2012 flows into the first water inlet/outlet 112 through the hot water pipe 2041 and flows into the first water channel 110 through the first water inlet/outlet 112, and the water in the water end 2020 is not used, so that the water in the fourth water channel 140 (which is communicated with the fourth water inlet/outlet 142) and the third water channel 130 (which is communicated with the third water inlet/outlet 132) is not used at this time, the hot water flowing into the first water inlet/outlet 112 continues to flow toward the first water channel 110, and the hot water in the first water channel 110 continues to flow toward the second water channel 120, so that the generated pressure difference can switch the one-way valve 200 from the closed position to the open position, that is, the one-way valve 200 is switched from the closed position to the open position, and the hot water flows back into the water inlet pipe 2011 through the cold water pipe 2042 through the second water channel 120, and the hot water is further fed into the water channel 2010, thereby realizing a certain circulation loop, and a certain reserve is formed.

As shown in fig. 6, in the water use state, the check valve 200 is closed and is in the closed position, at this time, since a part of hot water is already stored in the cold water pipe 2042 and the hot water pipe 2041, when water is needed at the water use end 2020, the water flows from the cold water pipe 2042 to the second water inlet/outlet 122, then flows into the second flow passage 120, flows into the third water inlet/outlet 132 through the third flow passage 130, then flows into the cold water pipe 2022 from the third water inlet/outlet 132, and finally flows into the water use end 2020; water also enters the first water inlet/outlet 112 from the hot water pipe 2041, then enters the first runner 110 from the first water inlet/outlet 112, flows from the first runner 110 to the fourth runner 140, then enters the hot water pipe 2021, and finally enters the water use end 2020, thereby realizing instant use of hot water at the water use end 2020.

Alternatively, in the examples of fig. 5 and 6 of the present application, the water return valve 1000 is disposed near the water usage end 2020, so that when the water usage end 2020 alone uses cold water, the cold water flow is easily excessive, and the water heater 2010 is easily started by mistake, and in this case, the water return valve 1000 with the flow stabilizing member 500 may be adopted, and the flow stabilizing member 500 is provided as a fitting in the third interface part provided with the third water inlet/outlet 132 and further provided in the third flow passage 130, so that the problem of the water heater 2010 being started by mistake when the water usage end 2020 uses cold water can be effectively solved.

Optionally, as shown in fig. 5 and 6, a water mixing valve 2023 is further disposed near the water usage end 2020, and the water mixing valve 2023 is respectively connected to the cold water usage pipe 2022 and the hot water usage pipe 2021, so that the hot water and the cold water flowing to the water usage end 2020 are uniformly mixed, and the water usage temperature is comfortable and convenient to control.

The following describes the water supply system 2200 with a return pipe according to an embodiment of the present invention with reference to the drawings.

A water supply system 2200 with return lines according to an embodiment of the present invention, as shown in fig. 7 and 8, includes: the water heater 2010, the water-using end 2020, the water return valve 1000 and the cold water source 2030 in the foregoing examples, and the structure of the water return valve 1000 may be referred to in the foregoing, and will not be described herein.

As shown in fig. 7 and 8, the water heater 2010 includes a water inlet pipe 2011 and a water outlet pipe 2012, wherein the water inlet pipe 2011 may be used to feed water to the water heater 2010, and the water outlet pipe 2012 may discharge heated hot water of the water heater 2010 to the outside.

The water-using end 2020 is connected to the hot water-using pipe 2021 and the cold water-using pipe 2022, the hot water-using pipe 2021 is connected to the water outlet pipe 2012 via the hot water pipe 2041, and the water-using end 2020 may be a terminal water-using device such as a household washbasin, a shower device, and a bath device. The hot water line 2021 may provide hot water to the water use end 2020, and the cold water line 2022 may provide cold water to the water use end 2020.

As shown in fig. 4 and 7, the third water inlet/outlet 132 is connected to the water inlet pipe 2011, and the first water inlet/outlet 112 is connected to the hot water pipe 2041 through the water return pipe 2043.

The cold water source 2030 is connected to the second water inlet/outlet 122, and the cold water source 2030 is connected to the cold water pipe 2022 through the cold water pipe 2042, wherein the cold water source 2030 may be a main tap water pipe or a water storage tank or a regeneration water tank, as long as a sufficient amount of water for life and bathing can be provided.

As shown in fig. 7, when the water heater 2010 returns water, the water of the return pipe 2043 flows to the third water inlet/outlet 132 through the first water inlet/outlet 112, thereby returning the water to the water heater 2010.

As can be seen from the above structure, in the water supply system 2200 with a return pipe according to the embodiment of the present invention, when the water heater 2010 returns, under the driving of the relevant components of the water heater 2010 (specifically, the driving pump 2013 disposed in the water heater 2010 shown in fig. 7 or 8), the hot water in the water outlet pipe 2012 enters the hot water pipe 2041, flows into the return pipe 2043 through the hot water pipe 2041, then enters the first water inlet/outlet 112 from the return pipe 2043, and then flows into the first runner 110 through the first water inlet/outlet 112, and the water in the second water inlet/outlet 122 does not flow outwards at this time, and the third water inlet/outlet 132 is communicated with the water inlet 2011, so that a pressure difference is generated between the first runner 110 (communicated with the first water inlet/outlet 112), the second runner 120 (communicated with the second water inlet/outlet 122) and the third water runner 130 (communicated with the third water inlet/outlet 132), so that the check valve 200 is switched from the closed to the open position, and then switched from the closed position to the circulating position, so that the hot water further flows into the third runner 120, and then flows into the third runner 130 through the third runner 130, and the third water inlet/outlet 2011 to form a certain circulation loop, thereby realizing a certain circulation loop.

As shown in fig. 8, in the water use state, the check valve 200 is closed and is in the cut-off position, at this time, since a part of the hot water is already stored in the hot water pipe 2041, when the water use end 2020 needs water, the hot water having a certain temperature flows from the hot water pipe 2041 into the hot water use pipe 2021 and finally into the water use end 2020, thereby realizing the instant-on and instant-use of the hot water at the water use end 2020.

Alternatively, in the example of fig. 7 and 8 of the present application, the water return valve 1000 is disposed near the water heater 2010, and the water return valve 1000 does not need to pass water to the outside of the fourth flow passage 140, so that the fourth flow passage 140 can be blocked by the aforementioned blocking cover 600. In addition, in the third flow passage 130, the water return valve 1000 shown in fig. 7 and 8 does not need to be provided with the flow stabilizing member 500, so that the water quantity of the water flowing out of the third flow passage 130 can be ensured to be large enough, the structure of the water return valve 1000 is simpler, and the water flow rate can be ensured.

The water heater 2010 of the embodiment of the present invention is described below with reference to the drawings of the specification.

A water heater 2010 in accordance with an embodiment of the present invention includes the previously described embodiment of the return valve 1000 having a plug 600.

According to the water heater 2010 of the embodiment of the invention, the water heater 2010 can have the zero cold water supply function by arranging the water return valve 1000 with the plug cover 600 on the pipeline close to the water heater 2010, and the description of the related zero cold water supply in the water supply system 2200 with the water return pipe can be referred to, and the description is not repeated here.

Or the water return valve 1000 with the blocking cover 600 is arranged in the water heater 2010, and the flow stabilizing piece 500 is not arranged in the third flow passage 130, so that the large-flow water return of the water heater 2010 with the water return pipe 2043 can be realized, the sufficient hot water quantity is ensured, and the instant heating and instant use of the hot water are realized.

Optionally, the water heater 2010 of the present invention is a gas water heater, a gas wall-mounted boiler, a heat storage gas water heater, or the like with a zero cold water preheating circulation function, which is not particularly limited herein.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The water return valve 1000, the water return-less water supply system 2100, the water return-having water supply system 2200, the heating principle of water heater 2010 to water in water heater 2010, the driving principle of driving pump 2013, and the one-way shut-off principle of the one-way valve 200 according to the embodiment of the present invention are all known to those skilled in the art and will not be described in detail herein.

In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water return valve, comprising:

The valve body comprises four joint parts with the ends meeting, and each joint part extends towards different directions; the tail ends of the four interface parts are open and respectively form a first water inlet and outlet, a second water inlet and outlet, a third water inlet and outlet and a fourth water inlet and outlet, the second water inlet and outlet are always communicated with the third water inlet and outlet, and the first water inlet and outlet are always communicated with the fourth water inlet and outlet;

The one-way valve is a half-flow regulating valve and is arranged between the first water inlet and the second water inlet, and when the one-way valve is opened, water in the first water inlet and the second water inlet can flow to the second water inlet in a one-way; when the one-way valve is closed, water in the first water inlet and outlet can flow to the fourth water inlet and outlet, and water in the second water inlet and outlet can flow to the third water inlet and outlet;

The first axis of the first water inlet and outlet is not parallel to the second axis of the second water inlet and outlet; the second axis of the second water inlet and outlet is coaxially arranged with the fourth axis of the fourth water inlet and outlet; an included angle exists between the first axis and the fourth axis.

2. The water return valve of claim 1, wherein the valve body is internally provided with a first runner communicated with the first water inlet and outlet, a second runner communicated with the second water inlet and outlet, a third runner communicated with the third water inlet and outlet, and a fourth runner communicated with the fourth water inlet and outlet; the first flow passage and the fourth flow passage are intersected and communicated, and the second flow passage and the third flow passage are intersected and communicated; the valve body is provided with a backwater state and a water use state;

The check valve is arranged at one side of the second flow passage, which is close to the first flow passage, and can be switched between a cut-off position and a circulation position, wherein the check valve is closed when the check valve is in the cut-off position, and the check valve cuts off the first flow passage and the second flow passage; the one-way valve being open in the flow-through position, the one-way valve communicating the first flow passage with the second flow passage; when the valve body is switched from the water use state to the water return state, the one-way valve is switched from the cut-off position to the circulation position, so that water in the first flow passage flows into the second flow passage or the third flow passage.

3. The water return valve of claim 2, wherein the check valve is disposed at a junction of the second flow passage and the third flow passage, the check valve sealing the first flow passage and the second flow passage when the valve body is in a water use condition, and wherein water flow at least partially passes through the check valve when flowing between the second flow passage and the third flow passage.

4. The water return valve of claim 3, wherein the communication port of the third flow passage on the second flow passage at least partially overlaps the valve body of the one-way valve, the one-way valve opening toward one end of the second water inlet and outlet.

5. The water return valve of claim 1, wherein the one-way valve comprises a blocking portion, a receiving portion and an elastic member, the elastic member is sleeved between the blocking portion and the receiving portion, so that the blocking portion is connected to the receiving portion in a telescopic manner, the elastic member can drive the blocking portion to move in a direction away from the receiving portion so that the one-way valve is closed, and the receiving portion is arranged towards the second water inlet and outlet.

6. The water return valve of claim 5, wherein the maximum cross-sectional dimension of the receiving portion is less than the maximum cross-sectional dimension of the blocking portion, the one-way valve is semi-open toward one side of the second water inlet and outlet, and water in the second water inlet and outlet can bypass the receiving portion and communicate with water in the third water inlet and outlet.

7. The water return valve according to any one of claims 1-6, further comprising a flow stabilizing member provided in an interface portion provided with the third water inlet/outlet, the flow stabilizing member comprising a flow stabilizing core having a flow rate of 6-8L/min.

8. The water return valve according to any one of claims 1-6, further comprising a blanking cover disposed at the fourth water inlet and outlet.

9. A water supply system without a return line, comprising:

the water heater comprises a water inlet pipe and a water outlet pipe;

The water-using end is connected with a hot water-using pipe and a cold water-using pipe;

The water return valve of claim 7, the fourth water inlet and outlet being in communication with the hot water conduit and the third water inlet and outlet being in communication with the cold water conduit; the first water inlet and outlet are communicated with the water outlet pipe through a hot water pipe, and the second water inlet and outlet are communicated with the water inlet pipe through a cold water pipe;

a cold water source which is respectively communicated with the water inlet pipe and the cold water pipe;

when the water heater returns water, the one-way valve is opened, hot water of the water outlet pipe flows from the first water inlet and outlet to the second water inlet and outlet, and returns to the water inlet pipe through the cold water pipe.

10. A water supply system having a return line, comprising:

the water heater comprises a water inlet pipe and a water outlet pipe;

The water-using end is connected with a hot water-using pipe and a cold water-using pipe, and the hot water-using pipe is communicated with the water outlet pipe through a hot water pipe;

The water return valve of claim 8, the third water inlet and outlet being in communication with the water inlet pipe, the first water inlet and outlet being in communication with the hot water pipe through a water return pipe;

the cold water source is communicated with the second water inlet and outlet, and is communicated with the cold water pipe through a cold water pipe;

When the water heater returns water, the one-way valve is opened, and water in the water return pipe flows to the third water inlet and outlet through the first water inlet and outlet.

11. A water heater, comprising: the water return valve of claim 8.