Check valve and water purifier

Abstract

The utility model discloses a check valve and a water purifier, and the check valve comprises a valve body which is provided with an inlet, an outlet and a flow channel for communicating the inlet with the outlet; the non-return structure is mounted in the flow channel and is used for unidirectionally conducting the non-return valve from the inlet to the outlet; the peripheral surface of the valve body is provided with a vent hole for communicating the flow channel with the outside, the vent hole is located at the upstream of the non-return structure, the opening and closing assembly is installed on the vent hole and used for opening or closing the vent hole, the opening and closing assembly comprises a warping plate, the warping plate comprises a force application part, a hinge part and an abutting part which are sequentially arranged, and the hinge part is hinged to the valve body; when the warping plate is located at the first position, the abutting part is used for abutting against and sealing the vent hole; and when the warping plate is located at the second position, the abutting part is far away from the vent hole. The vent hole is opened by turning over the warping plate of the opening and closing assembly, then gas on the upstream of the check valve is exhausted, exhaust of the centrifugal pump installed on the upstream of the check valve is facilitated, and the efficiency of the centrifugal pump is improved.

Description

Technical Field

[0001] The utility model relates to a check valve and a water purifier. Background Art

[0002] The check valve only allows the liquid to flow in one direction and prevents the liquid from flowing back. It is used to protect the upstream equipment and improve the stability of the system. The check valve often works automatically. When the fluid flows in the normal direction, the valve disc or piston is opened by the kinetic energy of the fluid, and when the fluid flows back, these components automatically close and cut off the fluid channel. Due to the above advantages of the check valve, the check valve has been widely used in aquatic products, such as water heaters, water purifiers, etc. Especially for some products with complex waterways and many branches, when it is necessary to prevent the reverse flow of water, it is achieved through the check valve. However, in some cases, when the check valve realizes the function of preventing the reverse flow of water, it also brings a problem: the problem of air trapped at the front end of the check valve. For example, when using a centrifugal pump to pump water from a water tank, if a check valve is needed after the centrifugal pump, when the centrifugal pump empties the water in the water tank, air enters the centrifugal pump, which will cause the problem of water trapped air. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defect of the check valve in the prior art that it is easy to cause air entrapment, and to provide a check valve and a water purifier.

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

[0005] A check valve, comprising:

[0006] A valve body having an inlet and an outlet and a flow channel connecting the inlet and the outlet;

[0007] A check structure, installed in the flow channel, used for the check valve to conduct one-way from the inlet to the outlet;

[0008] An opening and closing component, wherein an air vent connecting the flow channel with the outside is arranged on the outer peripheral surface of the valve body, the air vent is located upstream of the check structure, the opening and closing component is installed on the air vent, and is used to open or close the air vent, the opening and closing component comprises a seesaw, the seesaw comprises a force-applying portion, a hinged portion and an abutting portion arranged in sequence, and the hinged portion is hinged to the valve body;

[0009] When the rocker is in the first position, the abutment portion is used to abut against and close the vent hole;

[0010] When the rocker is at the second position, the abutting portion is away from the vent hole.

[0011] In this solution, if a check valve is connected behind the centrifugal pump, when the centrifugal pump evacuates the water from the water tank, air will enter the centrifugal pump, and the check valve will cause air entrapment because there is still residual liquid upstream of the check structure of the check valve, and the gravity of the retained liquid pulls the check structure. In this case, the centrifugal pump cannot discharge the air between the check valve and the centrifugal pump. The check valve is provided with an opening and closing assembly upstream of the check structure, and the vent is opened by flipping the seesaw of the opening and closing assembly, thereby discharging the gas upstream of the check valve, so that the retained liquid pulled by the check structure is discharged, and it is also convenient for the centrifugal pump installed upstream of the check valve to exhaust air, thereby improving the efficiency of the centrifugal pump.

[0012] During operation, the force-applying part of the seesaw is pressed to make the abutting part of the seesaw move away from the vent, thereby opening the vent to exhaust air; one end of the seesaw close to the abutting part is pressed to make the abutting part of the seesaw abut against the vent, thereby closing the vent; the vent is opened or closed by rotating the seesaw, and the operation is simple, convenient and labor-saving.

[0013] Preferably, the opening and closing assembly also includes an elastic element, two ends of which are respectively connected to the valve body and the rocker, and the elastic element applies a force that causes the abutment portion to abut against the vent when in the first position, and applies a force that causes the abutment portion to move away from the vent when in the second position.

[0014] In this solution, the elastic element is compressed to the maximum in the middle position, and when any of the two sides approaches the middle position, the elastic element will exert a force away from the middle position. The elastic element is provided to maintain the state of the seesaw, and only when a large external force is applied to the seesaw can the seesaw be rotated from the first position to the second position, thereby preventing the state of the seesaw from being easily changed.

[0015] Preferably, the seesaw has a first protrusion and a second protrusion on a surface opposite to the abutting portion, the first protrusion is arranged at one end of the seesaw close to the abutting portion, and the second protrusion is arranged at one end of the seesaw close to the force applying portion.

[0016] In this solution, by providing the first protrusion and the second protrusion, it is convenient to manually apply external force to the first protrusion or the second protrusion to switch the seesaw from the first position to the second position, or from the second position to the first position.

[0017] Preferably, a recessed portion is further provided on the surface of the valve body, and the opening and closing assembly is located in the recessed portion.

[0018] In this solution, the recessed portion forms a protective structure for protecting the opening and closing components.

[0019] Preferably, the opening and closing assembly further comprises a cover plate, which is mounted on the recessed portion and detachably connected to the valve body, and two through holes are arranged on the cover plate, and the two through holes are respectively arranged in one-to-one correspondence with the first protrusion and the second protrusion.

[0020] In this solution, the cover plate is provided to protect the seesaw. The entire structure of the seesaw does not need to be exposed. The first protrusion and the second protrusion only need to be exposed through the through hole to prevent dust from entering the vent. The through hole is provided on the cover plate to facilitate pressing the first protrusion or the second protrusion through the through hole, which is simple and convenient to operate.

[0021] Preferably, when the rocker is in the first position, the second protrusion does not protrude from the outer surface of the cover plate;

[0022] When the rocker is in the second position, the first protrusion protrudes from the outer surface of the cover plate through the through hole.

[0023] In this solution, when the rocker is in the first position, that is, the vent hole is in a closed state, the second protrusion does not protrude from the cover plate, thereby ensuring that the vent hole is not opened by mistake in the closed state, thereby improving reliability.

[0024] When the rocker is in the second position, the first protrusion protrudes from the cover plate through the through hole, so as to remind the user that the vent hole is in an open state, so that the user can grasp the state of the vent hole in time.

[0025] Preferably, the seesaw further has a limiting portion, which is disposed at one end of the seesaw close to the force-applying portion, and is used to abut against the valve body in the second position.

[0026] In this solution, the limiter is used to limit the flipping angle of the seesaw to prevent the flipping angle of the seesaw from being too large, so that the seesaw can achieve state switching of the vent hole in a smaller space, and the structure is compact.

[0027] Preferably, the abutting portion has a chamfer, and the inner wall of the vent hole is provided with a chamfer.

[0028] In this solution, the above-mentioned structural arrangement is adopted to facilitate the abutting portion of the seesaw to slide into or out of the vent hole.

[0029] Preferably, the opening and closing assembly further comprises an elastic element, two ends of which are respectively connected to the valve body and the seesaw, and the elastic element applies a force causing the abutting portion to abut against the vent hole.

[0030] In this solution, the elastic element always applies a force that causes the abutting portion of the seesaw to abut against and close the vent hole, so that the vent hole remains in a closed state. When opening the vent hole, the force-applying portion of the seesaw needs to be pressed manually and continuously, so that the seesaw always remains in the second position. When closing the vent hole, the force applied to the force-applying portion is canceled, and the seesaw automatically returns to the first position under the force of the elastic element, that is, the abutting portion of the seesaw abuts against the vent hole, and the vent hole is closed.

[0031] A water purifier comprises the check valve as described above.

[0032] In this solution, the water purifier also includes a centrifugal pump, and the check valve is installed at the outlet end of the centrifugal pump. The check valve prevents water from flowing back to the centrifugal pump and is used to protect the centrifugal pump. When gas is trapped between the centrifugal pump and the check valve, the gas can be exhausted by opening the opening and closing unit on the check valve, so that the inner cavity of the centrifugal pump is filled with water, thereby improving the working efficiency of the centrifugal pump.

[0033] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the utility model.

[0034] The positive and progressive effect of the utility model is that the check valve is provided with an opening and closing component upstream of the check structure, and the vent hole is opened by flipping the seesaw of the opening and closing component, thereby discharging the gas upstream of the check valve, so that the retained liquid pulled by the check structure is discharged, and it is also convenient for the centrifugal pump installed upstream of the check valve to exhaust gas, thereby improving the efficiency of the centrifugal pump. During operation, the force-applying part of the seesaw is pressed to make the abutting part of the seesaw away from the vent hole, and the vent hole is opened for exhaust, and one end of the seesaw close to the abutting part is pressed to make the abutting part of the seesaw abut against the vent hole, and the vent hole is closed. The vent hole is opened or closed by rotating the seesaw, and the operation is simple, convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The structure of the check valve of the first embodiment of the utility model is shown in FIG. Figure 1 (The rocker is in the first position).

[0036] Figure 2 for Figure 1 Sectional view along line AA.

[0037] Figure 3 The structure diagram of the hidden cover plate of the check valve of the first embodiment of the utility model is shown in FIG. Figure 2 (The rocker is in the first position).

[0038] Figure 4 The structure of the check valve of the first embodiment of the utility model is shown in FIG. Figure 3 (The rocker is in the second position).

[0039] Figure 5The structure of the check valve of the first embodiment of the utility model is shown in FIG. Figure 4 (The rocker is in the second position).

[0040] Figure 6 for Figure 5 Sectional view along line BB.

[0041] Description of reference numerals:

[0042] Valve body 1

[0043] Import 11

[0044] Exit 12

[0045] Runner 13

[0046] Ventilation holes 14

[0047] Depression 15

[0048] Backstop structure 2

[0049] Opening and closing components 3

[0050] Seesaw 31

[0051] Force applying part 311

[0052] Hinge 312

[0053] Contact part 313

[0054] First protrusion 314

[0055] The second protrusion 315

[0056] Limiting part 316

[0057] Elastic element 32

[0058] Cover 33

[0059] Through hole 331 DETAILED DESCRIPTION

[0060] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0061] Example 1

[0062] like Figure 1-Figure 6As shown, this embodiment discloses a check valve, which includes a valve body 1, a check structure 2, and an opening and closing assembly 3. The valve body 1 has an inlet 11 and an outlet 12 and a flow channel 13 connecting the inlet 11 and the outlet 12. The check structure 2 is installed on the flow channel 13, which is used for the check valve to unidirectionally conduct from the inlet 11 to the outlet 12. The outer peripheral surface of the valve body 1 is provided with a vent hole 14 connecting the flow channel 13 with the outside. The vent hole 14 is located upstream of the check structure 2. The opening and closing assembly 3 is installed on the vent hole 14, which is used to open or close the vent hole 14. The opening and closing assembly 3 includes a seesaw 31, which includes a force-applying portion 311, a hinged portion 312, and an abutting portion 313 arranged in sequence, and the hinged portion 312 is hinged to the valve body 1. When the seesaw 31 is in the first position, the abutting portion 313 is used to abut and close the vent hole 14; when the seesaw 31 is in the second position, the abutting portion 313 is away from the vent hole 14. When a check valve is connected to the back of a centrifugal pump, after the centrifugal pump empties the water in the water tank, air will enter the centrifugal pump, and the check valve will cause air entrapment because there is still liquid retained upstream of the check structure of the check valve, and the gravity of the retained liquid pulls the check structure. In this case, the centrifugal pump cannot discharge the air between the check valve and the centrifugal pump. The check valve is provided with an opening and closing component 3 upstream of the check structure 2, and the seesaw 31 of the opening and closing component 3 is flipped to open the vent 14, thereby discharging the gas upstream of the check valve, so that the retained liquid pulled by the check structure is discharged, and it is also convenient for the centrifugal pump installed upstream of the check valve to exhaust air, thereby improving the efficiency of the centrifugal pump.

[0063] like Figure 2 As shown, when operating the opening and closing component 3, the force-applying portion 311 of the rocker 31 is pressed to move the abutting portion 313 of the rocker 31 away from the vent 14, thereby opening the vent 14 for exhaust; the end of the rocker 31 close to the abutting portion 313 is pressed to make the abutting portion 313 of the rocker 31 abut against the vent 14, thereby closing the vent 14; the vent 14 is opened or closed by rotating the rocker 31, and the operation is simple, convenient and labor-saving.

[0064] like Figure 2 and Figure 6 As shown, the opening and closing assembly 3 also includes an elastic element 32, the two ends of which are respectively connected to the valve body 1 and the rocker 31. The elastic element 32 applies a force to make the abutting portion 313 abut against the vent hole 14 when in the first position, and applies a force to make the abutting portion 313 away from the vent hole 14 when in the second position. Figure 2The elastic element 32 is compressed to the maximum, and when any of the two sides approaches the middle position, the elastic element 32 will exert a force away from the middle position. By providing the elastic element 32, the elastic force of the elastic element 32 keeps the state of the seesaw 31 at the first position or the second position. Only when a large external force is applied to the seesaw 31 can the seesaw 31 be rotated from the first position to the second position, thereby preventing the state of the seesaw 31 from being easily changed.

[0065] like Figure 2 and Figure 6 As shown, the seesaw 31 has a first protrusion 314 and a second protrusion 315 on the surface opposite to the abutment portion 313. The first protrusion 314 is arranged at one end of the seesaw 31 close to the abutment portion 313, and the second protrusion 315 is arranged at one end of the seesaw 31 close to the force-applying portion 311, so as to facilitate manual application of external force to the first protrusion 314 or the second protrusion 315 to switch the seesaw 31 from the first position to the second position, or from the second position to the first position.

[0066] like Figure 2 He Ru Figure 3 As shown, a recessed portion 15 is further provided on the surface of the valve body 1, and the opening and closing assembly 3 is located in the recessed portion 15. The recessed portion 15 forms a protective structure for protecting the opening and closing assembly 3.

[0067] like Figure 2-Figure 6 As shown, the opening and closing assembly 3 also includes a cover plate 33, which is mounted on the recessed portion 15 and detachably connected to the valve body 1. The cover plate 33 is provided with two through holes 331, and the two through holes 331 are respectively provided in one-to-one correspondence with the first protrusion 314 and the second protrusion 315. By providing the cover plate 33, it is convenient to protect the seesaw 31. It is not necessary to expose the entire structure of the seesaw 31. It is only necessary to expose the first protrusion 314 and the second protrusion 315 through the through holes 331 to prevent dust from entering the vent 14. By providing the through holes 331 on the cover plate 33, it is convenient to press the first protrusion 314 or the second protrusion 315 through the through holes 331, and the operation is simple and convenient.

[0068] like Figure 1-Figure 3 As shown, when the rocker 31 is in the first position, that is, the vent hole 14 is in a closed state, the second protrusion 315 does not protrude from the outer surface of the cover plate 33, ensuring that the vent hole 14 is not opened by mistake in the closed state, thereby improving reliability.

[0069] like Figure 4-Figure 6 As shown, when the rocker 31 is in the second position, the first protrusion 314 protrudes from the outer surface of the cover plate 33 through the through hole 331, which is used to remind the user that the vent hole 14 is in an open state, so that the user can grasp the state of the vent hole 14 in time.

[0070] like Figure 2 and Figure 6As shown, the seesaw 31 also has a limiting portion 316, which is arranged at one end of the seesaw 31 close to the force-applying portion 311. The limiting portion 316 is used for the seesaw 31 to abut against the valve body 1 when the seesaw 31 is in the second position, and is used to limit the flipping angle of the seesaw 31 to prevent the flipping angle of the seesaw 31 from being too large, so that the seesaw 31 can realize the state switching of the vent 14 in a smaller space, and the structure is compact.

[0071] The abutting portion 313 is chamfered, and the inner wall of the vent hole 14 is also chamfered, so that the abutting portion 313 of the seesaw 31 can slide into or out of the vent hole 14 to make the state switching of the seesaw 31 smooth.

[0072] The check structure includes a valve core and an elastic component. A valve seat is provided on the inner wall of the valve body. The valve core is arranged in the flow channel so as to be movable along its own axial direction. The elastic component biases the valve core and makes the valve core abut against the valve seat in the direction of the fluid. The valve core abuts against the valve seat in the direction of the fluid through the elastic force of the elastic component, so that the flow channel is closed. When the fluid flows in from the inlet, when the force of the fluid acting on the valve core is greater than the elastic force of the elastic component, the valve core moves away from the valve seat, the flow channel is opened, and the flow channel is conducted from the inlet to the outlet. When the force of the fluid acting on the valve core is less than the elastic force of the elastic component or the fluid flows from the outlet to the inlet, the valve core abuts against the valve seat, the flow channel is closed, and the flow channel is cut off.

[0073] This embodiment also discloses a water purifier, which includes the check valve and a centrifugal pump as described above, wherein the check valve is installed at the outlet end of the centrifugal pump. The check valve prevents water from flowing back to the centrifugal pump, and is used to protect the centrifugal pump. When gas is trapped between the centrifugal pump and the check valve, the gas can be exhausted by opening the opening and closing unit on the check valve, so that the inner cavity of the centrifugal pump is filled with water, thereby improving the working efficiency of the centrifugal pump.

[0074] Example 2

[0075] This embodiment is basically the same as the embodiment 1, except that the opening and closing assembly further comprises an elastic element, both ends of which are respectively connected to the valve body and the rocker plate, and the elastic element applies a force that causes the abutting portion to abut against the vent hole.

[0076] In this embodiment, the elastic element always applies a force that causes the abutting portion of the seesaw to abut against and close the vent hole, so that the vent hole remains in a closed state. When opening the vent hole, the force-applying portion of the seesaw needs to be continuously pressed so that the seesaw always remains in the second position. When closing the vent hole, the force applied to the force-applying portion is canceled, and the seesaw automatically returns to the first position under the force of the elastic element, that is, the abutting portion of the seesaw abuts against the vent hole, and the vent hole is closed, which is simple and convenient to operate.

[0077] In the description of this article, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0078] 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 appended 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 all fall within the protection scope of the utility model.

Claims

1. A check valve, characterized in that: The check valve comprises: A valve body having an inlet and an outlet and a flow channel connecting the inlet and the outlet; A check structure, installed in the flow channel, for the check valve to conduct one-way from the inlet to the outlet; An opening and closing component, wherein an air vent connecting the flow channel with the outside is arranged on the outer peripheral surface of the valve body, the air vent is located upstream of the check structure, the opening and closing component is installed on the air vent, and is used to open or close the air vent, the opening and closing component comprises a seesaw, the seesaw comprises a force-applying portion, a hinged portion and an abutting portion arranged in sequence, and the hinged portion is hinged to the valve body; When the rocker is in the first position, the abutment portion is used to abut against and close the vent hole; When the rocker is at the second position, the abutting portion is away from the vent hole.

2. The check valve according to claim 1, characterized in that: The opening and closing assembly also includes an elastic element, two ends of which are respectively connected to the valve body and the rocker, and the elastic element applies a force that causes the abutment portion to abut against the vent when in the first position, and applies a force that causes the abutment portion to move away from the vent when in the second position.

3. The check valve according to claim 2, characterized in that: The seesaw has a first protrusion and a second protrusion on a surface opposite to the abutting portion, the first protrusion is arranged at one end of the seesaw close to the abutting portion, and the second protrusion is arranged at one end of the seesaw close to the force applying portion.

4. The check valve according to claim 3, characterized in that: The surface of the valve body is also provided with a recessed portion, and the opening and closing assembly is located in the recessed portion.

5. The check valve according to claim 4, characterized in that: The opening and closing assembly also includes a cover plate, which is installed in the recessed portion and detachably connected to the valve body. Two through holes are arranged on the cover plate, and the two through holes are respectively arranged in one-to-one correspondence with the first protrusion and the second protrusion.

6. The check valve according to claim 5, characterized in that: When the rocker is in the first position, the second protrusion does not protrude from the outer surface of the cover plate; When the rocker is in the second position, the first protrusion protrudes from the outer surface of the cover plate through the through hole.

7. The check valve according to claim 1, characterized in that: The seesaw further has a limiting portion, which is disposed at one end of the seesaw close to the force-applying portion, and is used to abut against the valve body when in the second position.

8. The check valve according to claim 1, characterized in that: The abutting portion is provided with a chamfer, and the inner wall of the vent hole is provided with a chamfer.

9. The check valve according to claim 1, characterized in that: The opening and closing assembly further comprises an elastic element, two ends of which are respectively connected to the valve body and the seesaw, and the elastic element applies a force that causes the abutting portion to abut against the vent hole.

10. A water purifier, characterized in that: The water purifier comprises a non-return valve as claimed in any one of claims 1 to 9.

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