Automatic water closing valve and circulating pipeline comprising same

Abstract

The utility model provides an automatic water shut-off valve and a circulation pipeline including the same, the automatic water shut-off valve is arranged in series between a water inlet of a water purifier and the circulation pipeline, the automatic water shut-off valve comprises a flow channel through which the circulation pipeline supplies water to the water purifier; the valve element is arranged in the flow channel and used for opening or closing the flow channel, a memory spring clamping piece and an elastic piece are further arranged in the flow channel, the memory spring clamping piece is arranged at the end, facing an inlet of the flow channel, of the valve element, and the elastic piece is arranged at the end, facing an outlet of the flow channel, of the valve element. When the water temperature is lower than 38 DEG C, the elastic force of the memory spring clamping piece is smaller than that of the elastic piece, and the flow channel is kept open, and when the water temperature is higher than or equal to 38 DEG C, the elastic force of the memory spring clamping piece is larger than that of the elastic piece, and the flow channel is kept closed. Hot water is prevented from entering the water purifier, and the service life of a filter element of the water purifier is prolonged.

Description

Technical Field

[0001] The utility model particularly relates to an automatic water shut-off valve and a circulation pipeline containing the same. Background Art

[0002] As people's quality of life gets higher and higher, the demand for hot water also increases accordingly. Based on the increase in demand for hot water, users have proposed that they want hot water as soon as they turn on the tap. This is how water heaters with circulation functions appear. Their main function is to use a circulation pump to pump the cold water in the pipeline back to the hot water for heating, so that users can have hot water from the beginning. But corresponding problems also arise. If a household water purifier is connected in series in the pipeline, since the water inlet temperature of the household water purifier cannot exceed 40°C, when the circulation is completed, the temperature in the pipeline cannot be controlled and may exceed 40°C, which affects the use and life of the water purifier, resulting in a bad experience and damage to the water purifier filter. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defect in the prior art that the water temperature entering the water purifier exceeds the preset temperature and the water cannot be turned off in time, and to provide an automatic water shut-off valve and a circulation pipeline containing the same.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] An automatic water shut-off valve is provided in series between the water inlet and the circulation pipeline of a water purifier, and the automatic water shut-off valve comprises:

[0006] a flow channel, through which the circulation pipeline supplies water to the water purifier;

[0007] A valve core is arranged in the flow channel and is used to open or close the flow channel. A memory spring card and an elastic member are also arranged in the flow channel. The memory spring card is arranged at the end of the valve core facing the flow channel inlet, and the elastic member is arranged at the end of the valve core facing the flow channel outlet. When the water temperature is lower than 38°C, the elastic force of the memory spring card is less than the elastic force of the elastic member, and the flow channel remains open. When the water temperature is higher than or equal to 38°C, the elastic force of the memory spring card is greater than the elastic force of the elastic member, and the flow channel remains closed.

[0008] In this solution, a memory spring card and an elastic member are provided at both ends of the valve core, and both apply elastic force to the valve core at the same time to ensure that the water flow can enter the water purifier normally when the water temperature is low, below 38°C. When the water temperature is high, higher than or equal to 38°C, the memory spring card is affected by the water temperature and applies an elastic force greater than the elastic member to the valve core, thereby closing the flow channel in time to prevent hot water from entering the water purifier, damaging the water purifier filter element, and reducing the service life of the filter element. Compared with the memory spring, the memory spring card responds faster to the influence of water temperature and rebounds more quickly, so that the flow channel can be closed quickly, greatly reducing the flow of hot water entering the water purifier. Avoid slow closing of the flow channel, which causes irreversible damage to the filter element when some hot water enters the water purifier.

[0009] Preferably, the memory spring card is an arc-shaped structure. When the water temperature is lower than 38°C, the opening of the memory spring card faces the valve core. When the water temperature is higher than or equal to 38°C, the opening of the memory spring card faces the inlet of the flow channel.

[0010] In this solution, the direction of the opening is the process in which the memory spring card is deformed and the elastic force increases. During the process of increasing elastic force, the arc-shaped memory spring card has a shorter deformation process than the spiral memory spring, and can quickly apply an elastic force greater than the elastic part to the valve core, resulting in a faster response.

[0011] Preferably, the memory spring card is a hemispherical structure.

[0012] In this solution, the hemispherical structure is larger in size than the arc-shaped structure, and has a greater elastic force when deformed, so as to further enhance the elastic force of the memory spring card.

[0013] Preferably, the flow channel further includes a bracket, the bracket is arranged between the inlet of the flow channel and the valve core, and the memory spring card is arranged on the bracket.

[0014] In this solution, the above arrangement is used to effectively support the memory spring card, thereby ensuring the reliability and repeatability of the deformation of the memory spring card.

[0015] Preferably, the valve core includes a valve stem and a sealing portion connected to the valve stem, the valve stem is located at an edge area of ​​the sealing portion, and the memory spring card is arranged corresponding to a middle area of ​​the sealing portion.

[0016] In this solution, through the above arrangement, when the memory spring card is deformed and the elastic force increases to push the sealing part to move, the smooth movement of the sealing part is ensured to prevent the sealing part from deviating from the axial direction of the flow channel.

[0017] Preferably, a guide groove is provided on the bracket, and the valve stem is inserted into the guide groove.

[0018] In this solution, the valve stem is inserted into the guide groove to guide the sealing part during its movement.

[0019] Preferably, a plug is further provided in the flow channel, the elastic member is provided on the plug, a through hole is provided in the edge area of ​​the plug, and the through hole is provided corresponding to the valve core, and when the flow channel is closed, the valve core abuts against the plug and closes the through hole.

[0020] In this solution, a plug is provided to effectively support the elastic part, and a through hole is provided on the plug to ensure that water flows into the water purifier through the through hole when the valve core is away from the plug, and when the valve core abuts against the plug, the through hole is closed by abutment to achieve automatic water shut-off.

[0021] A circulation pipeline comprises the automatic water shut-off valve as described above.

[0022] In this solution, the circulation pipeline includes the above-mentioned automatic water shut-off valve, so that when the water temperature in the circulation pipeline exceeds 38°C, part of the pipeline is cut off by the automatic water shut-off valve.

[0023] Preferably, a water heater and a water purifier are arranged in parallel in the circulation pipeline, and the circulation pipeline includes a water outlet pipe and a water return pipe, the water outlet pipe is connected to the water outlet of the water heater, the water return pipe is connected to the water return port of the water heater, the water purifier is arranged on the water return pipe, and the automatic water shut-off valve is arranged in series between the water return pipe and the water purifier.

[0024] In this solution, through the above-mentioned setting, when the water temperature in the circulation pipeline exceeds 38°C, the hot water is prevented from entering the water purifier through the automatic water shut-off valve.

[0025] Preferably, a faucet or a shower is also arranged in series on the water outlet pipe.

[0026] In this solution, the circulating pipeline maintains a constant water temperature by circulating heated water. The water temperature received by the user at the faucet or shower can meet the user's needs, achieving hot water as soon as it is boiled and ensuring the service life of the water purifier filter.

[0027] The positive and progressive effect of the utility model is that the utility model is provided with a memory spring card and an elastic member at both ends of the valve core, and both of them apply elastic force to the valve core at the same time, so as to ensure that the water flow can enter the water purifier normally when the water temperature is low, below 38°C, and when the water temperature is high, higher than or equal to 38°C, the memory spring card is affected by the water temperature and applies an elastic force greater than the elastic member to the valve core, thereby closing the flow channel in time to prevent hot water from entering the water purifier, damaging the water purifier filter element, and reducing the service life of the filter element. Compared with the memory spring, the memory spring card responds faster to the influence of water temperature and rebounds more quickly, so that the flow channel can be closed quickly, greatly reducing the flow of hot water entering the water purifier. Avoid slow closing of the flow channel, so that some hot water enters the water purifier and causes irreversible damage to the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a state diagram of an automatic water shut-off valve of a preferred embodiment of the utility model when the flow channel is opened.

[0029] Figure 2 This is a state diagram of the automatic water shut-off valve of a preferred embodiment of the utility model when the flow channel is closed.

[0030] Figure 3 This is a schematic diagram of a circulation pipeline according to a preferred embodiment of the present invention.

[0031] Description of reference numerals:

[0032] Runner 1

[0033] Import 11

[0034] Exit 12

[0035] Spool 2

[0036] Stem 21

[0037] Sealing part 22

[0038] Memory spring card 3

[0039] Elastic parts 4

[0040] Bracket 5

[0041] Guide groove 51

[0042] Plug 6

[0043] Through hole 61

[0044] Tap 7

[0045] Shower 8

[0046] Water Purifier 10

[0047] Circulation line 20

[0048] Outlet pipe 23

[0049] Return pipe 24

[0050] Water heater 30

[0051] Water outlet 31

[0052] Return water outlet 32 DETAILED DESCRIPTION

[0053] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0054] This embodiment provides an automatic water shut-off valve, the specific structure of which is as follows Figure 1 , Figure 2 and Figure 3 As shown, the automatic water shut-off valve is arranged in series between the water inlet of the water purifier 10 and the circulation pipeline 20, and the automatic water shut-off valve includes:

[0055] Flow channel 1, the circulation pipeline 20 supplies water to the water purifier 10 through the flow channel 1;

[0056] The valve core 2 is arranged in the flow channel 1 and the valve core 2 is used to open or close the flow channel 1. A memory spring card 3 and an elastic member 4 are also arranged in the flow channel 1. The memory spring card 3 is arranged at the end of the valve core 2 facing the inlet of the flow channel 1, and the elastic member 4 is arranged at the end of the valve core 2 facing the outlet of the flow channel 1. When the water temperature is lower than 38°C, the elastic force of the memory spring card 3 is less than the elastic force of the elastic member 4, and the flow channel 1 remains open. When the water temperature is higher than or equal to 38°C, the elastic force of the memory spring card 3 is greater than the elastic force of the elastic member 4, and the flow channel 1 remains closed.

[0057] Specifically, the flow channel 1 is a cylindrical structure and is internally connected for water to flow through. It can be understood that the direction of water flow is from the circulation pipeline 20 through the flow channel 1 into the water purifier 10. The valve core 2 is the same shape and size as the inner wall of the flow channel 1, so that the flow channel 1 is opened or closed by the valve core 2. This is a prior art and will not be described in detail here. It should be noted that the memory spring card 3 is not a memory spring. The memory spring card is also made of memory metal in the prior art. The memory metal is a special metal material that can restore its original macroscopic shape in another temperature range after plastic deformation within a certain temperature range, such as nickel-titanium alloy material. Compared with the memory spring, the memory spring card 3 has a shorter deformation process and provides the required elastic force more quickly. On this basis, by arranging a memory spring card 3 and an elastic part 4 at both ends of the valve core 2, the elastic part 4 can be an ordinary spring in the prior art, which does not have the ability to deform within a certain temperature range. The elastic part 4 provides a preset and constant elastic force, and then both apply elastic force to the valve core 2 at the same time, and when the water temperature is low, below 38°C, the elastic force of the elastic part 4 is greater than the elastic force of the memory spring card 3, so that the valve core 2 opens the flow channel 1, ensuring that the water flow can enter the water purifier 10 normally.

[0058] When the water temperature is high, that is, when the water temperature is higher than or equal to 38°C, the memory spring card 3 is affected by the water temperature and exerts an elastic force on the valve core 2 that is greater than the elastic member 4, thereby pushing the valve core 2 to move along the axial direction of the flow channel 1 and closing the flow channel 1 in time to prevent hot water from entering the water purifier 10 and damaging the water purifier filter element, thereby reducing the service life of the filter element. Compared with the memory spring, the memory spring card 3 responds faster to the influence of water temperature and rebounds more quickly, so that the flow channel 1 can be closed quickly, greatly reducing the flow of hot water entering the water purifier 10. When the flow channel 1 is closed slowly, some hot water enters the water purifier 10 to cause irreversible damage to the filter element.

[0059] Furthermore, the memory spring card 3 is an arc-shaped structure. When the water temperature is lower than 38°C, the opening of the memory spring card 3 faces the valve core 2. When the water temperature is higher than or equal to 38°C, the opening of the memory spring card 3 faces the inlet 11 of the flow channel 1.

[0060] Specifically, the flow channel 1 includes an inlet 11 and an outlet 12, the valve core 2 is arranged near the outlet 12, and the memory spring card 3 is arranged near the inlet 11. From the cross section of the memory spring card 3, it is an arc-shaped structure, and the opening of the arc-shaped structure changes direction during the deformation process. When the opening is toward the valve core 2, the elastic force of the elastic member 4 is greater than the elastic force of the memory spring card 3, and when the opening is toward the inlet 11, the elastic force of the memory spring card 3 is greater than the elastic force of the elastic member 4. It can be understood that the change of the opening direction of the arc-shaped structure during the deformation process is not a slow change, but directly changes from one direction to another, thereby making the arc-shaped memory spring card 3 shorter in deformation process than the memory spring with a spiral structure, and can quickly apply an elastic force greater than the elastic member 4 to the valve core 2, so that the response is faster and the flow channel 1 is closed faster.

[0061] In other embodiments, the memory spring card 3 is a hemispherical structure. It is understandable that the hemispherical structure is a kind of arc structure, and its size is larger than that of the strip-shaped arc structure. When the memory spring card 3 is deformed by the water temperature, the hemispherical structure provides a greater elastic force when deformed than the arc structure, that is, the greater elastic force can push the valve core 2 to move and close the flow channel 1 more quickly than the strip-shaped arc structure, so as to further reduce the time required for automatic water shut-off, thereby reducing the flow of hot water entering the water purifier 10.

[0062] In this embodiment, the flow channel 1 further includes a bracket 5 , which is disposed between the inlet 11 of the flow channel 1 and the valve core 2 , and the memory spring card 3 is disposed on the bracket 5 .

[0063] Specifically, the bracket 5 is a cylindrical structure, and the memory spring card 3 is fixedly connected to the bracket 5. The connection method can be welding or screw connection. This is a prior art and will not be described in detail here. The valve core 2 is movably connected to the bracket 5, and the position of the bracket 5 in the flow channel 1 is limited by a retaining spring. By setting the bracket 5, the memory spring card 3 is effectively supported to ensure the reliability and repeatability of the deformation of the memory spring card 3. In addition, the bracket 5 can also limit the position of the valve core 2 in the flow channel 1 to prevent the valve core 2 from entering the circulation pipeline 20 from the inlet 11 of the flow channel 1, so as to improve the safety of the circulation pipeline 20.

[0064] Furthermore, the valve core 2 includes a valve stem 21 and a sealing portion 22 connected to the valve stem. The valve stem 21 is located at an edge area of ​​the sealing portion 22 , and the memory spring card 3 is disposed corresponding to a middle area of ​​the sealing portion 22 .

[0065] Specifically, the sealing part 22 is a disc structure, and a guide surface is provided at the edge of the disc structure, so that the mobility of the sealing part 22 is improved when it moves in the flow channel 1. Among them, the valve stem 21 is provided with multiple valve stems 21 and the multiple valve stems 21 are evenly distributed in the edge area of ​​the sealing part 22, and the valve stem 21 extends along the axial direction of the flow channel 1, thereby avoiding the memory spring card 3 provided in the middle area of ​​the corresponding sealing part 22. In other words, when the memory spring card 3 is deformed, it pushes the middle area of ​​the sealing part 22 of the valve core 2. Compared with pushing other areas of the sealing part 22, pushing the middle area of ​​the sealing part 22 can make the sealing part 22 move and close the flow channel 1 more smoothly, and avoid the sealing part 22 from deviating from the axial direction of the flow channel 1 when moving.

[0066] In this embodiment, a guide groove 51 is provided on the bracket 5 , and the valve stem 21 is inserted into the guide groove 51 .

[0067] Specifically, a guide groove 51 is provided in the edge area of ​​the bracket 5 corresponding to the edge area of ​​the sealing part 22, and the guide groove 51 also extends along the axial direction of the flow channel 1. The valve stem 21 is inserted into the guide groove 51, and the size of the guide groove 51 is larger than the size of the valve stem 21. When the memory spring card 3 deforms and pushes the sealing part 22, the valve stem 21 located in the guide groove 51 is guided by the guide groove 51 so that the sealing part 22 always moves along the axial direction of the flow channel 1, thereby playing a guiding role in the movement of the sealing part 22.

[0068] In this embodiment, a plug 6 is further provided in the flow channel 1, and the elastic member 4 is provided on the plug 6. A through hole 61 is provided in the edge area of ​​the plug 6, and the through hole 61 is provided corresponding to the valve core 2. When the flow channel 1 is closed, the valve core 2 abuts against the plug 6 and closes the through hole 61.

[0069] Specifically, the plug 6 is arranged near the flow channel outlet 12 and is located at the end of the valve core 2 away from the memory spring card 3. The middle area of ​​the plug 6 is provided with a receiving portion, which is a sleeve structure and the elastic member 4 is sleeved on the receiving portion. The elastic member 4 located in the middle area of ​​the plug 6 corresponds to the memory spring card 3 located at the other end of the valve core 2 and in the middle area of ​​the sealing portion 22, so that when the elastic force of the elastic member 4 is greater than the elastic force of the memory spring card 3, the valve core 2 is pushed to move to the bracket 5 along the axial direction of the flow channel 1 to avoid the displacement of the valve core 2. A through hole 61 is arranged on the plug 6 to ensure that the water flows into the water purifier through the through hole 61 when the valve core 2 is away from the plug 6, and when the valve core 2 abuts against the plug 6, the through hole 61 is closed by abutment to achieve automatic water shut-off.

[0070] This embodiment also provides a circulation pipeline 20, such as Figure 3As shown, the circulation pipeline 20 includes the above-mentioned automatic water shut-off valve. The circulation pipeline 20 includes the above-mentioned automatic water shut-off valve, so that when the water temperature in the circulation pipeline 20 exceeds 38°C, the automatic water shut-off valve cuts off part of the pipeline. It can be understood that part of the pipeline refers to the pipeline connected to the water purifier 10, so that hot water cannot enter the water purifier 10 to protect the service life of the filter element of the water purifier 10. Of course, while cutting off part of the pipeline, it can also ensure that the normal circulation function in the circulation pipeline 20 is not affected.

[0071] In this embodiment, a water heater 30 and a water purifier 10 are arranged in parallel in the circulation pipeline 20. The circulation pipeline 20 includes a water outlet pipe 23 and a return pipe 24. The water outlet pipe 23 is connected to the water outlet 31 of the water heater 30, and the return pipe 24 is connected to the return port 32 of the water heater 30. The water purifier 10 is arranged on the return pipe 24, and the automatic water shut-off valve is arranged in series between the return pipe 24 and the water purifier 10.

[0072] Specifically, a cold water pipe is provided on one side of the circulation pipeline 20 to replenish water flow in the circulation pipeline 20, and the water heater 30 is arranged in series in the circulation pipeline 20. The water outlet 31 of the water heater 30 is used to output hot water into the circulation pipeline 20, and the water return port 32 of the water heater 30 is used to guide the water flow of the temperature angle in the circulation pipeline 20 into the water heater 30 and heat it until the hot water temperature required by the user is reached. On this basis, the water outlet pipe 23 and the water return pipe 24 are connected end to end to form the circulation pipeline 20, and the circulation pipeline 20 is used to circulate the water flow until the user takes it. It can be understood that the circulation pipeline 20 of this embodiment is the same as the circulation pipeline in the prior art, and its pipeline arrangement has not been improved, so it will not be described in detail here. A branch is provided on the return pipe 24, and an automatic water shut-off valve and a water purifier 10 are provided in series on the branch. That is to say, the water heater 30 on the circulation pipeline 20 and the water purifier 10 on the branch are connected in parallel with each other, and an automatic water shut-off valve is provided in series on the branch, so that when the water temperature in the circulation pipeline 20 exceeds 38°C, the automatic water shut-off valve prevents the hot water in the branch from entering the water purifier 10.

[0073] In this embodiment, a faucet 7 or a shower head 8 is also arranged in series on the water outlet pipe 23 .

[0074] Specifically, the circulation pipeline 20 connects the water heater 30 in series on the water outlet pipe 23 and the return pipe 24 to circulate and heat the water flow and keep the water temperature constant. The water temperature received by the user at the faucet 7 or shower 8 connected to the water outlet pipe 23 can meet the user's needs, and the water is hot as soon as it is boiled. At the same time, the service life of the filter element of the water purifier 10 can be guaranteed.

[0075] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. An automatic water shut-off valve, which is arranged in series between the water inlet and the circulation pipeline of a water purifier, characterized in that: The automatic water shut-off valve comprises: a flow channel, through which the circulation pipeline supplies water to the water purifier; A valve core is arranged in the flow channel and is used to open or close the flow channel. A memory spring card and an elastic member are also arranged in the flow channel. The memory spring card is arranged at the end of the valve core facing the flow channel inlet, and the elastic member is arranged at the end of the valve core facing the flow channel outlet. When the water temperature is lower than 38°C, the elastic force of the memory spring card is less than the elastic force of the elastic member, and the flow channel remains open. When the water temperature is higher than or equal to 38°C, the elastic force of the memory spring card is greater than the elastic force of the elastic member, and the flow channel remains closed.

2. The automatic water shut-off valve according to claim 1, characterized in that: The memory spring card is an arc-shaped structure. When the water temperature is lower than 38° C., the opening of the memory spring card faces the valve core. When the water temperature is higher than or equal to 38° C., the opening of the memory spring card faces the inlet of the flow channel.

3. The automatic water shut-off valve according to claim 1, characterized in that: The memory spring card is a hemispherical structure.

4. The automatic water shut-off valve according to claim 1, characterized in that: The flow channel also includes a bracket, which is arranged between the inlet of the flow channel and the valve core, and the memory spring card is arranged on the bracket.

5. The automatic water shut-off valve according to claim 4, characterized in that: The valve core includes a valve stem and a sealing portion connected to the valve stem, the valve stem is located at an edge area of ​​the sealing portion, and the memory spring card is arranged corresponding to a middle area of ​​the sealing portion.

6. The automatic water shut-off valve according to claim 5, characterized in that: The bracket is provided with a guide groove, and the valve stem is inserted into the guide groove.

7. The automatic water shut-off valve according to claim 1, characterized in that: A plug is also provided in the flow channel, the elastic member is provided on the plug, a through hole is provided in the edge area of ​​the plug, and the through hole is provided corresponding to the valve core. When the flow channel is closed, the valve core abuts against the plug and closes the through hole.

8. A circulation pipeline, characterized in that: The circulation pipeline comprises an automatic water shut-off valve as described in any one of claims 1-7.

9. The circulation pipeline according to claim 8, characterized in that: A water heater and a water purifier are arranged in parallel in the circulation pipeline. The circulation pipeline includes a water outlet pipe and a water return pipe. The water outlet pipe is connected to the water outlet of the water heater, and the water return pipe is connected to the water return port of the water heater. The water purifier is arranged on the water return pipe, and the automatic water shut-off valve is arranged in series between the water return pipe and the water purifier.

10. The circulation pipeline according to claim 9, characterized in that: The water outlet pipe is also provided with a faucet or a shower in series.

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