One-way valve assembly and hot water system

Abstract

The present invention discloses a one-way valve assembly and a hot water system, wherein the one-way valve assembly comprises: a four-way pipe, the four-way pipe comprises an upper interface, a lower interface, a left interface and a right interface which are interconnected; a one-way valve, the one-way valve comprises a valve seat and a valve core, the cavity comprises an upper outlet and a lower outlet, and the outer periphery of the valve seat is also provided with a left outlet and a right outlet which are connected to the cavity; the valve core is placed in the cavity, a sealing surface is provided in the cavity, the valve core has a first position and a second position, when the valve core is in the first position, the cavity is blocked from top to bottom; when the valve core is in the second position, the cavity is connected from top to bottom. The one-piece structural design of the one-way valve assembly of the present invention satisfies the function of zero cold water, replaces the existing two three-way structures, makes the structure simpler and more compact, reduces the risk of water leakage, and reduces the manufacturing cost; at the same time, the overall parts are compact, which can greatly reduce the material cost.

Description

Technical Field

[0001] The invention relates to the technical field of water heaters, in particular to a one-way valve assembly in a water heater and a hot water system. Background Art

[0002] Most traditional water heater systems do not have the "zero cold water" function. After each use, some hot water will remain in the hot water pipe. Before the next use, this part of hot water will slowly cool down. The hot water needs to be drained before the hot water can be used normally. This will not only cause a waste of water resources, but also make the user's operation of the water heater system more cumbersome.

[0003] For this reason, a new type of water heater that can be turned on and heated instantly has appeared on the market. Its basic principle is to add a water pump to the ordinary water heater, and use the water pump to circulate the cooled hot water in the hot water pipe, thereby triggering the water heater to start heating and realize the "zero cold water" function of the pipeline. In addition, there are hot water circulation devices that are matched with traditional gas water heaters on the market. They also work on the above principle. The difference is that the hot water circulation device is independent of the water heater and is more flexible in terms of installation functions. It can achieve the purpose of transforming the original ordinary hot water system into an instant hot water circulation system without purchasing expensive zero cold water water heaters.

[0004] The current hot water circulation devices all have a one-way valve assembly installed in front of the farthest water-using end. The one-way valve assembly connects the hot water outlet pipe of the water heater, the cold water inlet pipe, and the hot water pipe and cold water pipe of the water-using terminal. The existing one-way valve assembly structure is generally complex, generally consisting of two tees plus a one-way valve. The two tees need to be connected by threads or pipes, which increases the material cost and production cost, and there is a risk of water leakage. On the other hand, the existing hot water circulation devices generally have the problem of misstarting when turning on the cold water. The existing solution is to install a flow-limiting valve core to limit the water flow to prevent the water heater from misstarting, but the effect is not obvious and it will limit the user's water experience. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a one-way valve assembly to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0006] The solution of the present invention to solve its technical problem is: a one-way valve assembly, comprising: a four-way pipe, the four-way pipe comprising an upper interface, a lower interface, a left interface and a right interface that are connected to each other; a one-way valve, the one-way valve is placed in the four-way pipe in an up-down direction, the one-way valve comprises a valve seat and a valve core, the valve seat comprises a cavity connected up and down, the cavity comprises an upper outlet and a lower outlet, the outer periphery of the valve seat is further provided with a left outlet and a right outlet connected to the cavity, the left outlet and the right outlet are arranged in an up-down staggered manner, the upper outlet is connected to the upper interface, the lower outlet is connected to the lower interface, the left outlet is connected to the left interface, and the right outlet is connected to the right interface; the valve core is placed in the cavity, a sealing surface is provided in the cavity, the sealing surface is located between the left outlet and the right outlet, the valve core has a first position and a second position, when the valve core is located in the first position, the valve core abuts against the sealing surface, and the cavity is blocked from top to bottom; when the valve core is located in the second position, the valve core is separated from the sealing surface, and the cavity is connected from top to bottom.

[0007] The beneficial effects of the present invention are: the one-piece structural design of the one-way valve assembly of the present invention meets the function of zero cold water, replaces the existing two three-way structures, makes the structure simpler and more compact, and reduces the risk of water leakage and the production cost; at the same time, the overall parts are small in size, which can greatly reduce the material cost.

[0008] As a further improvement of the above technical solution, the one-way valve further includes an elastic member, the elastic member is connected to the valve core, and the elastic member drives the valve core to move toward the first position. The elastic member can realize the automatic adjustment function of the one-way valve. In some embodiments, the elastic member can be a compression spring, or a magnet can be used to realize the automatic resetting of the one-way valve.

[0009] As a further improvement of the above technical solution, the valve seat includes a valve body and a valve cover, the valve cover is sleeved in the valve body, and the valve core is installed between the valve body and the valve cover. Splitting the valve seat into two independent valve bodies and valve covers can make the installation of the valve core simpler and more convenient.

[0010] As a further improvement of the above technical solution, the valve cover includes a base, a hollow column is provided in the middle of the base, support rings are provided around the base, the support rings abut against the inner wall of the cavity, the valve core includes a guide rod, the guide rod passes through the hollow column, and the elastic member is sleeved outside the guide rod. By optimizing the structure of the valve cover, the one-way valve can be made more compact as a whole, and the action reliability of the valve core can be stronger.

[0011] As a further improvement of the above technical solution, a limit block is provided in the inner wall of the four-way pipe, and a limit groove matching the limit block is provided on the valve seat. The limit groove is arc-shaped, so that the rotation angle of the one-way valve in the four-way pipe can be limited.

[0012] As a further improvement of the above technical solution, a slot is provided at the bottom of the valve seat. By providing a slot at the bottom of the valve seat, it is convenient to adjust the installation angle of the valve seat using a slotted screwdriver. By adjusting the installation angle of the valve seat, the effective flow area of ​​the left outlet can be adjusted.

[0013] As a further improvement of the above technical solution, it also includes a retaining spring, a positioning boss and a retaining spring groove are provided in the inner wall of the four-way pipe, one end of the valve seat abuts against the positioning boss, and the other end of the valve seat is fixed in the inner wall of the four-way pipe by the retaining spring. When installing, first insert the one-way valve into the four-way pipe so that the upper end of the valve seat abuts against the positioning boss, and then put the retaining spring into the retaining spring groove, and use the retaining spring to fix the one-way valve in the four-way pipe.

[0014] As a further improvement of the above technical solution, the inner diameter of the left outlet is larger than the inner diameter of the right outlet. When in use, the left outlet is used for hot water, while the right outlet is used for cold water. The through hole area of ​​the hot water end is as large as possible, in order to minimize the impact on the water flow of hot water used by users, and the through hole area of ​​the cold water end is set to be smaller in order to prevent the one-way valve from opening due to excessive cold water flow, causing the water heater to start by mistake. Therefore, setting a smaller channel area and adding an adjustable area can better prevent the water heater from starting by mistake.

[0015] As a further improvement of the above technical solution, a sealing ring is sleeved on the valve core. By adding the sealing ring on the valve core, the sealing performance of the valve core can be improved, so that when the valve core is in the first position, the hollow cavity can be more effectively blocked.

[0016] A hot water system includes a water heater, a hot water pipeline, a cold water pipeline and a remote water use point, wherein the remote water use point includes a hot water inlet and a cold water inlet, and includes a one-way valve assembly as described above, wherein the upper interface is connected to the cold water pipeline, the lower interface is connected to the hot water pipeline, the left interface is connected to the hot water inlet, and the right interface is connected to the cold water inlet.

[0017] This hot water system can achieve zero cold water in the pipeline. Users can immediately use hot water as long as they open the water point. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0019] Figure 1 is a cross-sectional view of the one-way valve assembly of the present invention, wherein the valve core is located in a first position;

[0020] Figure 2 is a cross-sectional view of the one-way valve assembly of the present invention, wherein the valve core is located in a second position;

[0021] Figure 3 is a cross-sectional view of a cross-section pipe of the present invention;

[0022] Figure 4 is a three-dimensional schematic diagram of a one-way valve of the present invention;

[0023] Figure 5 is a cross-sectional view of a one-way valve of the present invention;

[0024] Figure 6 is an exploded view of the one-way valve of the present invention;

[0025] Figure 7 is a schematic diagram of the hot water system of the present invention;

[0026] Figure 8 It is a schematic diagram of the installation of the one-way valve assembly of the present invention. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. The preferred embodiments of the present invention are shown in the drawings. The purpose of the drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and the technical personnel in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution. At the same time, the various technical features in the invention can be combined interchangeably without conflicting with each other.

[0031] Reference Figure 1 to Figure 6 A one-way valve assembly includes a four-way pipe 100 and a one-way valve 200. The four-way pipe 100 includes an upper port 110, a lower port 120, a left port 130 and a right port 140 that are connected to each other. The four-way pipe 100 is a "cross" structure as a whole, and the four ports are connected to each other. The four-way pipe 100 includes a longitudinal first inner pipe and a transverse second inner pipe.

[0032] The one-way valve 200 includes a valve seat 210 and a valve core 220, wherein the valve seat 210 is cylindrical in shape, and the outer diameter of the valve seat 210 matches the inner diameter of the first inner tube of the four-way pipe 100, and the length of the valve seat 210 is greater than the inner diameter of the second inner tube of the four-way pipe. The one-way valve 200 is placed in the four-way pipe 100 in an up-down direction, and a positioning boss 160 and a retaining spring groove 170 are provided on the inner wall of the first inner tube, wherein the positioning boss 160 is located on the upper side of the second inner tube, and the retaining spring groove 170 is located on the lower side of the second inner tube, and the distance between the positioning boss 160 and the retaining spring groove 170 is approximately equal to the length of the valve seat 210. When installing the one-way valve 200 and the four-way pipe 100, the one-way valve 200 is inserted into the first inner pipe from the lower interface 120, and then the top of the valve seat 210 is pressed against the positioning boss 160, and then a retaining spring 300 is inserted into the retaining spring groove 170, and the retaining spring 300 is used to press against the bottom end of the valve seat 210, thereby achieving the installation of the one-way valve 200 and the four-way pipe 100. Since the outer diameter of the valve seat 210 is adapted to the inner diameter of the first inner pipe of the four-way pipe 100 and the length of the valve seat 210 is greater than the inner diameter of the second inner pipe, after the one-way valve 200 is installed, the four interfaces of the four-way pipe 100 are separated by the one-way valve 200, and the four interfaces cannot be directly connected.

[0033] The valve seat 210 includes a cavity 201 connected up and down, the valve core 220 is placed in the cavity 201 of the valve seat 210, and the valve core 220 can move up and down relative to the valve seat 210, the cavity 201 includes an upper outlet 211 and a lower outlet 212, and the outer periphery of the valve seat 210 is also provided with a left outlet 213 and a right outlet 214 connected to the cavity 201, the left outlet 213 and the right outlet 214 are arranged in an up-and-down staggered manner, the upper outlet 211 is connected to the upper interface 110, the lower outlet 212 is connected to the lower interface 120, the left outlet 213 is connected to the left interface 130, and the right outlet 214 is connected to the right interface 140; a sealing surface 202 is provided in the cavity 201, and the sealing surface 202 is located between the left outlet 213 and the right outlet 214, and the valve core 220 has a first position and a second position, see Figure 1When the valve core 220 is located at the first position, the valve core 220 abuts against the sealing surface 202, and the upper and lower parts of the cavity 201 are blocked. Since the sealing surface 202 is located between the left outlet 213 and the right outlet 214, the left outlet 213 and the right outlet 214 are also blocked. However, since the left outlet 213 is connected to the cavity 201 and the lower outlet 212 is connected to the cavity 201, the lower outlet 212 is connected to the left outlet 213. At the same time, since the lower outlet 212 is connected to the lower interface 120 and the left outlet 213 is connected to the left interface 130, the lower interface 120 and the left interface 130 of the cross-way pipe 100 are connected through the one-way valve 200. Similarly, because the upper outlet 211 is in communication with the upper port 110 , and the right outlet 214 is in communication with the right port 140 , the upper port 110 and the right port 140 of the cross-way pipe 100 are in communication with each other through the one-way valve 200 .

[0034] See also Figure 2 When the valve core 200 is in the second position, the valve core 200 is separated from the sealing surface 202, and the cavity 201 is connected from top to bottom. When the valve core 200 is separated from the sealing surface 202, the middle of the cavity 201 is not blocked, and the upper outlet 211 and the lower outlet 212 of the cavity 201 are connected to each other, so the upper interface 110 and the lower interface 120 of the cross-way pipe 100 are connected through the one-way valve 200.

[0035] As a further preferred embodiment, the one-way valve 200 further includes an elastic member 230, which is connected to the valve core 220, and the elastic member 230 drives the valve core 220 to move toward the first position. Specifically, the elastic member 230 may be a compression spring.

[0036] The valve seat 210 includes a valve body 250 and a valve cover 260, wherein the valve cover 260 is sleeved in the valve body 250, and the valve core 220 is installed between the valve body 250 and the valve cover 260. The cavity 201, the sealing surface 202, the lower outlet 212, the left outlet 213 and the right outlet 214 are all arranged on the valve body 250, and the upper outlet 211 is arranged on the valve cover 260. The valve cover 260 includes a base 261, wherein a hollow column 262 is arranged in the middle of the base 261, and a support ring 263 is arranged around the base 261, wherein the support ring 263 abuts against the inner wall of the cavity 201, and the valve core 220 includes a guide rod 221, wherein the guide rod 221 passes through the hollow column 262, and the elastic member 230 is sleeved outside the guide rod 221. When assembling the one-way valve 200, first open the valve body 250 and the valve cover 260, then put the valve core 220 into the cavity 201 of the valve body 250, then put the elastic member 230 onto the guide rod 221, then align the guide rod 221 of the valve core 220 with the hollow column 262, and finally fix the valve body 250 and the valve cover 260. The fixing method of the valve body 250 and the valve cover 260 can be bonding, threading, buckling, etc. Due to the presence of the elastic member 230, after assembly, the valve core 220 receives the driving force of the elastic member 230, so that the valve core 220 always has a downward force, forcing the valve core 220 to always press against the sealing surface 202, and the cavity 201 is separated by the cooperation between the valve core 220 and the sealing surface 202.

[0037] In order to keep the valve core 220 always moving toward the first position and always against the sealing surface 202, in addition to using a compression spring, a magnet can also be used. For example, a magnet with an N pole is installed on the valve core 220, and a magnet with an N pole is also installed on the valve cover 260. By using the principle that like poles repel each other, the valve core 220 always tends to move away from the valve cover 260. Alternatively, a magnet with an S pole is added to the sealing surface 202, and by using the principle that opposite poles attract each other, the valve core 220 always tends to move toward the sealing surface 202.

[0038] As a further preferred embodiment, a limit block 150 is provided in the inner wall of the four-way pipe 100, and a limit groove 215 matching the limit block 150 is provided on the valve seat 210. A straight groove 216 is provided at the bottom of the valve seat 210. Since the valve seat 210 is cylindrical as a whole, when the one-way valve 200 is installed in the four-way pipe 100, the one-way valve 200 is easy to rotate in the four-way pipe 100, and since the left outlet 213 and the right outlet 214 are arranged on the outer periphery of the valve seat 210, when the valve seat 210 rotates a certain angle, it is easy for the left outlet 213 to be disconnected from the seat interface 130. In order to avoid the above situation, it is necessary to ensure that the installation position of the valve seat 210 is accurate. Therefore, by providing a stopper 150 on the inner wall of the cross-way pipe 100 and providing a stopper groove 215 on the valve seat 210, specifically, the stopper groove 215 can be provided on the valve cover 260. Only when the stopper 150 is aligned with the stopper groove 215, can the one-way valve 200 be installed. Otherwise, if the top surface of the valve seat 210 abuts against the stopper 150, the retaining spring 300 will not be installed in the retaining spring groove 170.

[0039] Since the flow area of ​​the right outlet 214 determines the effective flow area of ​​the upper interface 110 and the right interface 140 of the four-way pipe 100, when the valve seat 210 is rotated, the effective flow area of ​​the right outlet 214 can be controlled by the pipe wall of the four-way pipe by changing the relative position of the right outlet 214. Therefore, the flow between the upper interface 110 and the right interface 140 can be freely adjusted. For the convenience of control, a slot 216 is provided at the bottom of the valve seat 210. The relative angle of the valve seat 210 can be rotated and adjusted by using a slotted screwdriver to reach in from the lower interface 120 of the four-way pipe. The range of the adjustment angle can be adjusted by the size matching between the limit block 150 and the limit slot 215. For example, the rotatable angle of the one-way valve 200 is controlled between 0°-60°. At the same time, by setting the relative installation position of the right outlet 214 on the valve seat 210 and the size of the right outlet, the controllable change of the effective flow area of ​​the right outlet 214 can be achieved.

[0040] As a further preferred embodiment, the inner diameter of the left outlet 213 is larger than the inner diameter of the right outlet 214. The through hole area at the hot water end is as large as possible in order to minimize the impact on the water flow of the hot water used by the user, while the through hole area at the cold water end is set to be smaller in order to prevent the one-way valve from opening due to excessive cold water flow, causing the water heater to start by mistake. Therefore, setting a smaller channel area and making the area adjustable can better prevent the water heater from starting by mistake.

[0041] As a further preferred embodiment, a sealing ring 222 is sleeved on the valve core 220. The sealing ring 222 can improve the sealing reliability between the valve core 220 and the sealing surface 202 when the valve core 220 is in the first position.

[0042] See also Figure 7-Figure 8 A hot water system includes a water heater 10, a hot water pipeline 20, a cold water pipeline 30 and a remote water point 40, wherein the remote water point 40 includes a hot water inlet 41 and a cold water inlet 42, and also includes a one-way valve assembly as mentioned above, wherein the upper interface 110 is connected to the cold water pipeline 30, the lower interface 120 is connected to the hot water pipeline 20, the left interface 130 is connected to the hot water inlet 41, and the right interface 140 is connected to the cold water inlet 42.

[0043] How it works

[0044] The hot water system is preheating. At this time, the hot water inlet 41 and the cold water inlet 42 of the remote water point 40 are in a closed state. The water pump in the zero cold water water heater starts to work, providing power to circulate the hot water in the pipeline, and pushes the spring in the one-way valve assembly, so that the one-way valve 200 is in the second position. The upper joint 110 of the four-way pipe 100 is connected with the lower joint 120. Since the pipelines corresponding to the left joint 130 and the right joint 140 are closed, the water flow in the four-way pipe 100 can only flow between the upper joint 110 and the lower joint 120, so that the water flow forms a complete loop, and the water heater heats the water in the entire pipeline. After the preheating is completed, the pipeline is full of hot water, and the user can enjoy hot water by opening the water point.

[0045] When using water, due to the equal pressure in the four-way pipe 100, under the action of the elastic member 230, the valve core 220 is in the first position, the upper and lower parts of the cavity 201 are isolated, and the upper and lower interfaces of the four-way pipe 100 are not connected to each other. When the user turns on the hot water, the hot water can flow out through the through hole at the hot water end of the one-way valve body (the through hole at the hot water end corresponds to the left outlet 213 on the one-way valve 200), and when the user turns on the cold water, the cold water can flow out through the through hole at the cold water end of the one-way valve body (the through hole at the cold water end corresponds to the right outlet 214 on the one-way valve 200). It should be noted that the through hole area at the hot water end is larger than the through hole at the cold water end, and the hot water end and the cold water end are separated by the one-way valve core, spring, and sealing ring, and the through hole at the cold water end can adjust the effective flow area of ​​the through hole by adjusting the angle of the one-way valve according to the different water pressures, so as to prevent the water heater from being started incorrectly due to excessive cold water flow when the cold water is turned on, which drives the water flow at the hot water end.

[0046] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A one-way valve assembly, characterized in that: include: A four-way pipe, wherein the four-way pipe comprises an upper interface, a lower interface, a left interface and a right interface which are interconnected with each other; the four-way pipe is in a "cross" shape as a whole, and the four interfaces are interconnected with each other; the four-way pipe comprises a longitudinal first inner tube and a transverse second inner tube; A one-way valve, the one-way valve is placed in the four-way pipe in an up-down direction, the one-way valve comprises a valve seat and a valve core, wherein the valve seat is cylindrical as a whole, the outer diameter of the valve seat is adapted to the inner diameter of the first inner tube of the four-way pipe, and the length of the valve seat is greater than the inner diameter of the second inner tube of the four-way pipe; The valve seat comprises a cavity connected up and down, the cavity comprises an upper outlet and a lower outlet, and a left outlet and a right outlet connected to the cavity are also provided on the outer periphery of the valve seat, the left outlet and the right outlet are staggered up and down, the upper outlet is connected to the upper interface, the lower outlet is connected to the lower interface, the left outlet is connected to the left interface, and the right outlet is connected to the right interface; The valve core is placed in the cavity, a sealing surface is provided in the cavity, the sealing surface is located between the left outlet and the right outlet, the valve core has a first position and a second position, when the valve core is located in the first position, the valve core abuts against the sealing surface, and the cavity is blocked from top to bottom; when the valve core is located in the second position, the valve core is separated from the sealing surface, and the cavity is connected from top to bottom; A slot is provided at the bottom of the valve seat; the installation angle of the valve seat is adjusted using a slotted screwdriver, and the effective flow area of ​​the left outlet can be adjusted by adjusting the installation angle of the valve seat; the inner diameter of the left outlet is greater than the inner diameter of the right outlet.

2. The one-way valve assembly according to claim 1, characterized in that: The one-way valve further comprises an elastic member, wherein the elastic member is connected to the valve core, and the elastic member drives the valve core to move toward the first position.

3. The one-way valve assembly according to claim 2, characterized in that: The valve seat comprises a valve body and a valve cover, the valve cover is sleeved in the valve body, and the valve core is installed between the valve body and the valve cover.

4. The one-way valve assembly according to claim 3, characterized in that: The valve cover comprises a base body, a hollow column is arranged in the middle of the base body, support rings are arranged around the base body, the support rings abut against the inner wall of the cavity, the valve core comprises a guide rod, the guide rod passes through the hollow column, and the elastic member is sleeved outside the guide rod.

5. The one-way valve assembly according to claim 1, characterized in that: A limit block is arranged in the inner wall of the four-way pipe, and a limit groove matching the limit block is arranged on the valve seat.

6. The one-way valve assembly according to claim 1, characterized in that: It also includes a retaining spring. A positioning boss and a retaining spring groove are provided in the inner wall of the four-way pipe. One end of the valve seat abuts against the positioning boss, and the other end of the valve seat is fixed in the inner wall of the four-way pipe by the retaining spring.

7. The one-way valve assembly according to claim 1, characterized in that: A sealing ring is sleeved on the valve core.

8. A hot water system, comprising a water heater, a hot water pipeline, a cold water pipeline and a remote water point, wherein the remote water point comprises a hot water inlet and a cold water inlet, characterized in that: It comprises a one-way valve assembly as described in any one of claims 1 to 7 above, wherein the upper interface is connected to the cold water pipeline, the lower interface is connected to the hot water pipeline, the left interface is connected to the hot water outlet, and the right interface is connected to the cold water outlet.

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