Drip-proof device and drinking water path system

Abstract

The utility model relates to the technical field of kitchen appliances, and discloses a drip-proof device, which comprises a main pipe body, a water inlet pipe, a water outlet pipe and a water outlet pipe, the liquid inlet section, the throat section and the liquid outlet section are communicated in sequence; one end, communicated with the throat section, of the liquid inlet section is gradually shrunk towards the throat section; one end, communicated with the throat section, of the liquid outlet section is gradually shrunk towards the throat section; an air vent communicated with the liquid outlet section or the throat section is formed in the outer wall of the main pipe body; and the deformation cavity is communicated with the ventilation opening, and the volume of the deformation cavity can change along with the change of the internal air pressure of the deformation cavity. The utility model has the beneficial effects that the Venturi tube structure is formed in the main tube body and is matched with the deformation cavity to generate negative pressure, and water in the water outlet nozzle of the drinking water equipment is sucked back after water taking is stopped, so that the situation that water continues to drip from the water outlet after water taking is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of drinking water water channel systems, in particular to a water dripping prevention device and a drinking water water channel system. Background Art

[0002] With the improvement of modern people's quality of life, various drinking water equipment has entered the home, and people's experience requirements for drinking equipment are increasing. In the existing drinking water equipment technology, there is often a phenomenon of dripping after taking water (including hot and cold water). This phenomenon refers to the phenomenon that after the user takes water, that is, after the water is stopped, a small part of the water in the water outlet of the drinking water equipment will drip down under the action of gravity. The dripping phenomenon will cause corrosion of the appearance of the drinking water equipment and short circuit of internal parts. Especially when taking hot water, there is a risk of users being scalded by water droplets, affecting the user experience. Utility Model Content

[0003] The utility model aims to provide a water dripping prevention device and a water channel system for drinking water, so as to solve the above-mentioned technical problems.

[0004] In order to achieve the above objectives, the following technical solutions are provided:

[0005] In the first aspect, the utility model provides an anti-drip device, comprising: a main body, which has a liquid inlet section, a throat section and a liquid outlet section in sequence along a preset direction; the liquid inlet section, the throat section and the liquid outlet section are connected in sequence; one end of the liquid inlet section connected to the throat section gradually shrinks toward the throat section; one end of the liquid outlet section connected to the throat section gradually shrinks toward the throat section; the outer wall of the main body is provided with a vent connected to the liquid outlet section or the throat section; a deformation cavity, which is connected to the vent, and the volume of the deformation cavity can change with the change of the internal air pressure.

[0006] As an optional solution of the anti-drip device provided by the utility model, the deformation cavity is integrally connected to the main pipe.

[0007] As an optional solution of the anti-drip device provided by the utility model, it also includes a sealing sleeve surrounded by the outside of the main pipe body, the sealing sleeve is elastic or flexible, both ends of the sealing sleeve are respectively sealed and connected to the main pipe body, the inner wall of the sealing sleeve is opposite to the outer wall of the main pipe body, and together form the deformation cavity.

[0008] As an optional solution for the anti-drip device provided by the utility model, the outer wall portion of the main pipe participating in forming the deformation cavity is provided with the vent, so that the vent is built into the deformation cavity.

[0009] As an optional solution of the anti-drip device provided by the utility model, the sealing sleeve is detachably connected to the main pipe.

[0010] As an optional solution for the anti-drip device provided by the utility model, the outer wall of the main body is provided with an annular boss, the number of the annular bosses is two and they are axially aligned with each other, the sealing sleeve is elastic, and the inner walls at both ends of the sealing sleeve are respectively adapted to radially elastically abut against the two groups of the annular bosses.

[0011] As an optional solution of the anti-drip device provided by the utility model, the two groups of annular bosses are respectively a first annular boss and a second annular boss, and the diameter of the first annular boss is greater than the diameter of the second annular boss.

[0012] As an optional solution of the anti-drip device provided by the utility model, it also includes a clamping structure for radially clamping the connection between the sealing sleeve and the annular boss.

[0013] As an optional solution of the anti-drip device provided by the utility model, the clamping structure is a spring clamp.

[0014] As an optional solution of the anti-drip device provided by the utility model, the vent is communicated with the lowest position of the deformation cavity.

[0015] As an optional solution of the anti-drip device provided by the utility model, the vent is communicated with the liquid outlet section.

[0016] In the second aspect, the utility model also provides a drinking water system, which includes a water tank, a water pump, a one-way valve, a heating device and a water vapor separation nozzle connected in series, and also includes an anti-drip device as mentioned above, which is connected in series between the one-way valve and the heating device.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] By forming a Venturi tube structure in the main pipe and cooperating with the deformation cavity to generate negative pressure, the water in the water outlet of the drinking water device is sucked back after the water is taken out, thereby avoiding the occurrence of continuous dripping from the water outlet after the water is taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0020] Figure 1 is a schematic diagram of the internal structure of the anti-drip device provided in this specific embodiment;

[0021] Figure 2 is a schematic cross-sectional view of the main pipe body of the anti-drip device provided in this specific embodiment;

[0022] Figure 3 is a schematic diagram of the explosion structure of the anti-drip device provided in this specific embodiment;

[0023] Figure 4 This is a schematic diagram of the structure of the drinking water channel system provided in this specific embodiment. Figure 1 ;

[0024] Figure 5 This is a schematic diagram of the structure of the drinking water channel system provided in this specific embodiment. Figure 2 .

[0025] In the figure:

[0026] 1. Main pipe body; 11. Liquid inlet section; 12. Throat section; 13. Liquid outlet section; 14. Contraction section; 15. Diffusion section; 16. Vent; 17. First annular boss; 18. Second annular boss; 19. Spring clamp; 2. Deformation cavity; 3. Sealing sleeve; 4. Water tank; 5. Water pump; 6. One-way valve; 7. Heating device; 8. Water vapor separation nozzle; 9. Water inlet valve. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The first implementation mode of the utility model:

[0031] In order to solve the problem of dripping after the existing drinking water equipment takes water, this embodiment provides a dripping prevention device, referring to Figure 1 to Figure 3 , which includes a main body 1, which has a liquid inlet section 11, a throat section 12 and a liquid outlet section 13 in sequence along a preset direction, and the liquid inlet section 11, the throat section 12 and the liquid outlet section 13 are connected in sequence, wherein one end of the liquid inlet section 11 connected to the throat section 12 gradually shrinks toward the throat section 12 to form a contraction section 14, and one end of the liquid outlet section 13 connected to the throat section 12 gradually shrinks toward the throat section 12 to form a diffusion section 15, so that a Venturi tube structure is formed inside the main body 1. In addition, the device also includes a deformable deformation cavity 2, and the internal volume of the deformation cavity 2 can change with the change of the internal air pressure. The main body 1 is provided with a vent 16, one end of the vent 16 is connected to the liquid outlet section 13 or the throat section 12 of the main body 1, and the other end of the vent 16 is connected to the deformation cavity 2.

[0032] When in use, the anti-drip device can be connected in series to the water system of the drinking water equipment, with the liquid inlet section 11 of the main body 1 connected to the water pump output end of the drinking water equipment, and the liquid outlet section 13 of the main body 1 connected to the water outlet of the drinking water equipment. When the user takes water, the water pump in the drinking water equipment pressurizes the water in the water tank 4 and delivers it to the water outlet. During the process, the water flows through the anti-drip device, and the water flows through the liquid inlet section 11, the contraction section 14, the throat section 12, the diffusion section 15 and the liquid outlet section 13 of the main body 1 in sequence, producing a Venturi effect, that is, the fluid flows from the liquid inlet section 11 through the throat section 12. When the user stops taking water, due to the negative pressure in the deformation cavity 2, the water in the water outlet of the drinking water device together with the air will be sucked back into the water pipe until the pressure balance is achieved inside the deformation cavity 2, thereby avoiding the occurrence of dripping at the water outlet after taking water.

[0033] The contraction section 14 is in the shape of a tapered tube with a cone angle of 21°±2°. The throat section 12 is a shorter straight tube section with a diameter of approximately one-third to one-quarter of the liquid inlet section 11. The diffusion section 15 is also in the shape of a tapered tube with a cone angle of 8° to 15°. The function of the diffusion section 15 is to gradually reduce the fluid velocity and gradually restore the pressure, thereby achieving a smooth outflow of the fluid.

[0034] Preferably, the vent 16 is connected to the liquid outlet section 13. This has the advantage that, compared with the throat section 12, the diameter of the liquid outlet section 13 is larger, and the water flow into the liquid outlet section 13 after passing through the diffusion section 15 is smoother, and it is less likely to generate turbulence or eddy currents after the gas inside the deformation cavity 2 is discharged.

[0035] The implementation structure and connection method of the deformation cavity 2 are diverse. For example, the deformation cavity 2 can exist independently of the main body 1 and be formed on a certain component. The vent 16 is connected to the deformation cavity 2 through the trachea. In this specific embodiment, the deformation cavity 2 is preferably designed to be integrally connected with the main body 1, which is conducive to improving the integration of the device and reducing the difficulty of installation and fixation.

[0036] Specifically, the anti-drip device also includes an elastic or flexible sealing sleeve 3, which is arranged around the outside of the main body 1, and the two ends of the sealing sleeve 3 are respectively sealed and connected to the main body 1, and the inner wall of the sealing sleeve 3 and the outer wall of the main body 1 are spaced and opposite to each other and jointly form a deformation cavity 2. Through the above scheme, the deformation cavity 2 is formed by the sealing sleeve 3 being integrally connected to the outside of the main body 1, and the outer wall of the main body 1 participates in forming the deformation cavity 2, so that the degree of integration of the deformation cavity 2 and the main body 1 is higher, which greatly improves the integration of the device, is conducive to simplifying the structure, and is conducive to maximizing the volume of the deformation cavity 2 under the preset total volume of the device. In addition, since the outer wall of the main body 1 constitutes the deformation cavity 2, the deformation cavity 2 is a semi-fixed and semi-movable structure. When working, the sealing sleeve 3 is radially telescopically deformed with the main body 1 as the center, thereby changing the volume of the deformation cavity 2, making the deformation trajectory of the deformation cavity 2 more regular and easy to control. In this embodiment, the material of the sealing sleeve 3 determines its elasticity or flexibility. When the sealing sleeve 3 is made of elastic materials such as rubber and silicone, the sealing sleeve 3 is elastic and can undergo elastic deformation and compress the internal volume of the deformation cavity 2 when the gas inside the deformation cavity 2 is extracted, and can undergo elastic deformation when the water intake stops and the deformation cavity 2 reabsorbs water and air. Similarly, when the sealing sleeve 3 is made of flexible materials such as aluminum foil and plastic film, the sealing sleeve is flexible and can undergo flexural deformation following the changes in the internal air pressure of the deformation cavity 2.

[0037] In order to improve the negative pressure reaction efficiency of the deformation cavity 2, that is, to improve "the deformation speed of the deformation cavity 2 undergoing exhaust compression and intake recovery under the action of the Venturi effect in the main body 1 during the process of taking in water and stopping taking in water", in this specific embodiment, the setting orientation of the vent 16 is limited, and the vent 16 is preferably arranged on the outer wall portion of the main body 1 participating in the inner wall of the deformation cavity 2, so that the vent 16 is built into the deformation cavity 2. This is beneficial for shortening the gas flow path between the deformation cavity 2 and the negative pressure area inside the main body 1, and accelerating the gas flow into and out of the deformation cavity 2, thereby achieving the purpose of improving the negative pressure reaction efficiency of the deformation cavity 2. In addition, there is no need to additionally set a pipeline to connect the vent 16 and the deformation cavity 2, thereby achieving the purpose of simplifying the structure.

[0038] There is a problem with the above design: that is, when the deformation cavity 2 sucks the water and air in the water outlet back to the water pipe through negative pressure, the deformation cavity 2 itself will also suck part of the water in the main body 1 through the vent 16. In order to prevent long-term water accumulation in the deformation cavity 2 and cause bacterial growth, this embodiment has been optimized and improved.

[0039] For example, the sealing sleeve 3 is detachably connected to the main body 1. When in use, the sealing sleeve 3 can be regularly disassembled to clean and drain the inside of the deformation cavity 2 to keep the inside of the deformation cavity 2 clean.

[0040] Specifically, the outer wall of the main body 1 is provided with an annular boss, the number of the annular bosses is two and they are axially aligned with each other, the inner walls at both ends of the sealing sleeve 3 are radially abutted with the two groups of annular bosses respectively, the sealing sleeve 3 is made of elastic materials such as food-grade silicone, and the inner walls at both ends of the sealing sleeve 3 are adapted to radially elastically abut with the outer walls of the two groups of annular bosses respectively. When disassembly is required, the sealing sleeve 3 only needs to be axially inserted into the annular boss.

[0041] To facilitate installation and disassembly, the two groups of annular bosses are respectively a first annular boss 17 and a second annular boss 18. The diameter of the first annular boss 17 is larger than the diameter of the second annular boss 18, so that the sealing sleeve 3 can be progressively inserted into the two groups of annular bosses, reducing the difficulty of disassembly.

[0042] In order to prevent the sealing sleeve 3 from deforming, shrinking, and spreading and displacing relative to the main body 1, thereby affecting the sealing of the deformation cavity 2, in this specific embodiment, the anti-drip device also includes a clamping structure for radially clamping the connection between the sealing sleeve 3 and the annular boss, thereby enhancing the connection strength between the sealing sleeve 3 and the annular boss and enhancing the sealing of the deformation cavity 2.

[0043] The clamping structure may be a cable tie or a rope. In this specific embodiment, the clamping structure is a spring clamp 19. When in use, the spring clamp 19 can be clamped or loosened by holding or loosening the handle of the spring clamp 19. The spring clamp 19 is easy to use and reusable.

[0044] In order to prevent long-term water accumulation in the deformation cavity 2 and cause bacterial growth, another improvement of this embodiment is that the connection position of the vent hole and the deformation cavity 2 is limited. Preferably, the vent 16 is connected to the lowest position of the deformation cavity 2. The advantage of this is that after the deformation cavity 2 absorbs water, when the water flows through the main body 1 and the Venturi phenomenon occurs when water is taken out next time, since the vent 16 is connected to the lowest position of the deformation cavity 2, the water in the deformation cavity 2 can be completely sucked out by the negative pressure in the main body 1, so that the water in the deformation cavity 2 can be replaced every time water is taken out, and it is easy to keep the interior of the deformation cavity 2 clean.

[0045] The second embodiment of the utility model is to provide a drinking water channel system that can be used for drinking water equipment such as a drinking fountain, Figure 4 , which includes a water tank 4, a water pump 5, a one-way valve 6, a heating device 7 and a water vapor separation nozzle 8 connected in series, and also includes an anti-drip device as in the first embodiment, which is connected in series between the one-way valve 6 and the heating device 7. When the water level in the water tank 4 is higher than the water outlet height of the water vapor separation nozzle 8, in order to prevent the water in the waterway from being unable to be closed after the water pump 5 stops working, the water in the waterway is prevented from being blocked by the one-way valve 6. Figure 5 The water system also includes a water inlet valve 9, which is connected in series between the water pump 5 and the one-way valve 6.

[0046] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A drip prevention device, characterized in that: include: A main pipe (1) having a liquid inlet section (11), a throat section (12) and a liquid outlet section (13) in sequence along a preset direction; The liquid inlet section (11), the throat section (12) and the liquid outlet section (13) are connected in sequence; One end of the liquid inlet section (11) connected to the throat section (12) gradually contracts toward the throat section (12); One end of the liquid outlet section (13) connected to the throat section (12) gradually contracts toward the throat section (12); The outer wall of the main pipe (1) is provided with a vent (16) connected to the liquid outlet section (13) or the throat section (12); The deformable cavity (2) is in communication with the vent (16), and the volume of the deformable cavity (2) can change with the change of the air pressure inside the cavity.

2. The anti-drip device according to claim 1, characterized in that: The deformation cavity (2) is connected to the main pipe (1).

3. The anti-drip device according to claim 2, characterized in that: It also comprises a sealing sleeve (3) arranged around the outside of the main pipe (1), the sealing sleeve (3) being elastic or flexible, the two ends of the sealing sleeve (3) being respectively sealedly connected to the main pipe (1), the inner wall of the sealing sleeve (3) being spaced apart from the outer wall of the main pipe (1), and jointly forming the deformation cavity (2).

4. The anti-drip device according to claim 3, characterized in that: The vent (16) is formed on the tube wall of the main tube (1), so that the vent (16) is built into the deformation cavity (2).

5. The anti-drip device according to claim 3, characterized in that: The sealing sleeve (3) is detachably connected to the main pipe body (1).

6. The anti-drip device according to claim 5, characterized in that: The outer wall of the main pipe (1) is provided with an annular boss, the number of the annular bosses is two and they are axially aligned with each other, the sealing sleeve (3) is elastic, and the inner walls at both ends of the sealing sleeve (3) are respectively adapted to radially elastically abut against the two groups of annular bosses.

7. The anti-drip device according to claim 6, characterized in that: The two groups of annular bosses are respectively a first annular boss (17) and a second annular boss (18); the diameter of the first annular boss (17) is greater than the diameter of the second annular boss (18).

8. The anti-drip device according to claim 6, characterized in that: It also comprises a clamping structure for radially clamping the connection between the sealing sleeve (3) and the annular boss.

9. The anti-drip device according to claim 8, characterized in that: The clamping structure is a spring clamp (19).

10. The anti-drip device according to claim 1, characterized in that: The vent (16) is in communication with the liquid outlet section (13).

11. The anti-drip device according to any one of claims 1 to 10, characterized in that: The vent (16) is in communication with the lowest position of the deformation cavity (2).

12. A drinking water channel system, characterized in that: It comprises a water tank (4), a water pump (5), a one-way valve (6), a heating device (7) and a water vapor separation nozzle (8) which are connected in series in sequence, and also comprises an anti-drip device as claimed in any one of claims 1 to 11, wherein the anti-drip device is connected in series between the one-way valve (6) and the heating device (7).

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