Backflow prevention assembly and dish washing machine

Abstract

The utility model provides an anti-backflow assembly and a dish-washing machine, and relates to the technical field of kitchen appliances, the anti-backflow assembly comprises a drainage mechanism and a check valve; the drainage mechanism has a sealing structure; the check valve is connected with the drainage mechanism, and the check valve and the sealing structure are oppositely arranged; the sealing structure and the check valve can be attached through magnetic adsorption or pressure so that the check valve and the sealing structure can be closed and sealed. After the drainage requirement is met, the check valve and the sealing structure are sealed in a closed mode under the magnetic effect or the check valve and the sealing structure are sealed in a closed mode under the external pressure effect so that water in the drainage mechanism can be prevented from flowing back into the water tank. The check valve is attached to the sealing structure through magnetism or external pressure, so that closed sealing of the check valve and the sealing structure is achieved, the anti-backflow effect of the check valve is good, and the problem that the amount of backflow water at the bottom of the water tank is too large due to self-profiling errors, material aging and uncertain water pressure in the drainage mechanism of the check valve is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to an anti-backflow component and a dishwasher. Background Art

[0002] Dishwashers have gradually entered Chinese home kitchens. In order to prevent the residual water discharged into the drain pipe by the drain pump from flowing back to the bottom of the sink, most dishwashers use rubber check valves to prevent the residual water from flowing back.

[0003] The rubber check valve is installed at one end of the drain pipe and relies on the contoured surface of the rubber check valve and the pressure of the drain pipe to seal and prevent the residual water in the drain pipe from flowing back to the bottom of the sink.

[0004] When the rubber of the rubber check valve ages or the residual water pressure in the drain pipe is insufficient, the residual water will still flow back to the bottom of the sink, resulting in poor anti-backflow effect of the rubber check valve. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-backflow component to solve the technical problem that the anti-backflow effect of the rubber check valve in the prior art is poor.

[0006] The anti-backflow assembly provided by the utility model includes a drainage mechanism and a check valve;

[0007] The drainage mechanism has a sealing structure;

[0008] The check valve is connected to the drainage mechanism, and the check valve is arranged opposite to the sealing structure; the sealing structure and the check valve can be fitted together by magnetic adsorption or pressure, so that the check valve and the sealing structure are closed and sealed.

[0009] Furthermore, a magnetic component is provided inside the sealing structure.

[0010] Furthermore, the magnetic member is annular or arc-shaped.

[0011] Furthermore, a metal part that can be attracted by the magnetic part is provided inside the check valve.

[0012] Furthermore, the check valve is made of rubber or plastic.

[0013] Furthermore, the drainage mechanism includes a drainage channel and a drainage joint;

[0014] The drainage joint is arranged at the end of the drainage channel, the sealing structure is formed on the drainage joint, and the check valve is connected to the drainage joint.

[0015] Furthermore, the drainage joint is provided with a first limiting member, and the drainage channel is provided with a second limiting member, and the first limiting member is cooperatively connected with the second limiting member to limit the circumferential rotation of the drainage joint.

[0016] Furthermore, the check valve is snap-connected to the drain joint.

[0017] Furthermore, a torsion spring is provided between the drainage mechanism and the check valve, and the torsion spring can provide pressure to the check valve so that the sealing structure fits the check valve.

[0018] The present invention also aims to provide a dishwasher, comprising the anti-backflow assembly provided by the present invention.

[0019] The utility model provides a backflow prevention assembly, comprising a drain mechanism and a check valve; the drain mechanism has a sealing structure; the check valve is connected to the drain mechanism and disposed opposite the sealing structure; the sealing structure and the check valve can be magnetically attracted or pressure-adapted to each other, thereby ensuring a closed seal between the check valve and the sealing structure. When drainage is required, the check valve is opened by a drain pump, and water at the bottom of the sink is discharged to the outside of the dishwasher through the drain mechanism. After drainage is completed, the check valve is magnetically and sealed to the sealing structure, or the check valve is pressure-adapted to the sealing structure, thereby preventing water in the drain mechanism from flowing back into the sink. The utility model provides a backflow prevention assembly, wherein after drainage is completed, the check valve is magnetically and pressure-adapted to the sealing structure, thereby ensuring a closed seal between the check valve and the sealing structure. This improves the backflow prevention effect of the check valve and reduces the problem of excessive backflow from the bottom of the sink caused by the check valve's own contour error, material aging, and uncertain water pressure in the drain mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is an exploded view of the backflow prevention assembly provided by an embodiment of the present utility model;

[0022] Figure 2 This is a bottom view of the backflow prevention assembly provided by an embodiment of the utility model;

[0023] Figure 3 yes Figure 2 A-A sectional view;

[0024] Figure 4 yes Figure 3 A magnified view of the structure at point B.

[0025] Icons: 1-sink; 101-drainage channel; 102-sink bottom; 103-second limiter; 2-drain pump; 3-drain connector; 301-first limiter; 302-snap buckle; 303-sealing structure; 4-magnetic part; 5-metal part; 6-check valve; 601-card interface; 7-drain pipe. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0027] The utility model provides an anti-backflow assembly and a dishwasher. A plurality of embodiments are given below to describe the anti-backflow assembly and the dishwasher provided by the utility model in detail.

[0028] Example 1

[0029] The anti-backflow component provided in this embodiment is as follows: Figures 1 to 4 As shown, it includes a drainage mechanism and a check valve 6; the drainage mechanism has a sealing structure 303; the check valve 6 is connected to the drainage mechanism, and the check valve 6 and the sealing structure 303 are arranged opposite to each other; the sealing structure 303 and the check valve 6 can be magnetically adsorbed or pressure-fitted to make the check valve 6 and the sealing structure 303 closed and sealed.

[0030] When drainage is required, the check valve 6 is opened under the drive of the drain pump 2, and the water at the bottom of the sink 102 is discharged to the outside of the dishwasher through the drainage mechanism; after the drainage requirement is completed, the check valve 6 is closed and sealed with the sealing structure 303 under the action of magnetism or the check valve 6 is closed and sealed with the sealing structure 303 under the action of external pressure to prevent the water in the drainage mechanism from flowing back into the sink 1.

[0031] The anti-backflow component provided in this embodiment, after completing the drainage requirement, the check valve 6 is fitted with the sealing structure 303 through magnetism or external pressure, thereby achieving a closed seal between the check valve 6 and the sealing structure 303, so that the anti-backflow effect of the check valve 6 is better, and the problem of excessive backflow of water at the bottom 102 of the sink caused by the check valve 6's own profiling error, material aging and uncertain water pressure in the drainage mechanism is reduced.

[0032] In an optional embodiment, the sealing structure 303 and the check valve 6 can be magnetically adsorbed so that the check valve 6 and the sealing structure 303 are closed and sealed; a magnetic part 4 can be set in the sealing structure 303, and a metal part 5 that can be attracted by the magnetic part 4 can be set in the check valve 6; or a metal part 5 that can be attracted by the magnetic part 4 can be set in the sealing structure 303, and a magnetic part 4 can be set in the check valve 6.

[0033] The sealing structure 303 and the check valve 6 are magnetically adsorbed, and the sealing structure 303 and the check valve 6 are easy to manufacture, which can achieve a stable anti-backflow effect, reduce the residual water volume at the bottom of the sink 102, save space, and have a low modification cost.

[0034] In this embodiment, a magnetic component 4 is provided inside the sealing structure 303 .

[0035] The magnetic component 4 can be embedded in the sealing structure 303 by injection molding, or can be fixed to the sealing structure 303 by combined assembly.

[0036] The magnetic member 4 is arranged inside the sealing structure 303 , which can ensure that there is a suitable magnetic force and a good sealing surface between the sealing structure 303 and the check valve 6 , and can save space.

[0037] Furthermore, the magnetic member 4 is annular or arc-shaped.

[0038] The magnetic member 4 may be in any suitable shape, such as an annular shape or an arc shape, as long as the magnetic member 4 can provide sufficient magnetic force and there is space for assembling the magnetic member 4 in the sealing structure 303 .

[0039] In this embodiment, the magnetic member 4 is a magnet.

[0040] Furthermore, a metal component 5 that can be attracted by the magnetic component 4 is provided inside the check valve 6 .

[0041] The metal that can be attracted by the magnetic member 4 can be iron, steel or any other suitable material.

[0042] In this embodiment, a magnetically conductive steel plate is provided inside the check valve 6 so that the check valve 6 can be magnetically attracted to the sealing structure 303 .

[0043] The metal component 5 that can be attracted by the magnetic component 4 can be embedded in the check valve 6 by injection molding, or can be fixed to the inside of the check valve 6 by combined assembly.

[0044] The metal member 5 that can be attracted by the magnetic member 4 is arranged inside the check valve 6 , which can ensure that there is a suitable magnetic force and a good sealing surface between the sealing structure 303 and the check valve 6 and can save space.

[0045] Furthermore, the check valve 6 is made of rubber or plastic.

[0046] The check valve 6 can be a plastic part that is injection-molded by embedding a magnetically conductive steel plate, or a rubber part that is vulcanized by embedding a magnetically conductive steel plate.

[0047] In order to ensure a good sealing effect, the magnetic attraction between the sealing structure 303 and the check valve 6 may be in the range of 1.6 Newtons to 2.3 Newtons.

[0048] Preferably, a double sealing surface design can be implemented for the check valve 6 and the sealing structure 303, i.e., the sealing surface of the check valve 6 is a structure in which a peripheral annular plane transitions to a central spherical surface, the mating surface of the sealing structure 303 is an annular plane, and the outer contour of the sealing structure 303 is sleeve-shaped. The sealing surface of the check valve 6 fits the mating surface of the sealing structure 303 to achieve plane sealing between the sealing surface of the check valve 6 and the mating surface of the sealing structure 303, and then transitions to the central spherical surface and is embedded in the interior of the sealing structure 303 to achieve embedded sealing, thereby enhancing the sealing effect and reducing the chance of leakage.

[0049] Furthermore, the drainage mechanism includes a drainage channel 101 and a drainage joint 3 ; the drainage joint 3 is provided at the end of the drainage channel 101 , a sealing structure 303 is formed on the drainage joint 3 , and a check valve 6 is connected to the drainage joint 3 .

[0050] The drain connector 3 is fixedly mounted at the end of the drain channel 101, and the check valve 6 is mounted on the drain connector 3. The drain connector 3 has a sealing structure 303. The sealing structure 303 and the check valve 6 are magnetically attracted or pressure-adhered to each other, thereby ensuring a closed seal between the check valve 6 and the sealing structure 303. The drain connector 3 and the end of the drain channel 101 can be connected by a fixed connection (e.g., bonding or welding) or by a detachable connection (e.g., snap-fit ​​or threaded connection). The check valve 6 and the drain connector 3 can be connected by a fixed connection (e.g., bonding or welding) or by a detachable connection (e.g., snap-fit ​​or threaded connection).

[0051] The drain pipe 7 is sealed on the outer periphery of the drain channel 101, and the check valve 6 and the drain connector 3 are both located in the drain pipe 7. The drain pipe 7 is sealed on the outer periphery of the drain channel 101 to ensure a certain sealing effect, and the drain pump 2 is sealed and assembled with the bottom 102 of the water tank.

[0052] When drainage is required, the check valve 6 is opened under the drive of the drain pump 2, and the washing water at the bottom of the sink 102 is discharged to the drain pipe 7 through the drain connector 3, and then further discharged to the outside of the dishwasher.

[0053] Furthermore, the drainage joint 3 is provided with a first limiting member 301 , and the drainage channel 101 is provided with a second limiting member 103 . The first limiting member 301 is cooperatively connected with the second limiting member 103 to limit the circumferential rotation of the drainage joint 3 .

[0054] The first limiting member 301 may be a limiting boss, and the second limiting member 103 may be a limiting groove; the first limiting member 301 may also be a limiting groove, and the second limiting member 103 may be a limiting boss.

[0055] In this embodiment, the first limiting member 301 is a limiting boss, and the second limiting member 103 is a limiting groove. The limiting boss and the limiting groove are matched and connected to limit the circumferential rotation of the drain connector 3 .

[0056] Furthermore, the check valve 6 is engaged with the drain connector 3 .

[0057] The check valve 6 is snap-fitted to the drain connector 3 , making connection and disassembly more convenient. The snap-fit ​​connection method can also limit the check valve 6 in the axial and radial directions.

[0058] Specifically, the clamping interface 601 of the check valve 6 is clamped together with the clamping buckle 302 of the drain connector 3, thereby limiting the axial and radial position of the check valve 6. To improve the sealing effect, the clamping interface 601 of the check valve 6 has a certain elastic deformation ability. After the clamping interface 601 of the check valve 6 is elastically clamped with the clamping buckle 302 of the drain connector 3, there is a certain elastic deformation, which can ensure that the check valve 6 can be opened and closed to a certain angle under the action of external force, thereby realizing the opening and closing function of the check valve 6.

[0059] In another optional embodiment, a torsion spring is provided between the drainage mechanism and the check valve 6 , and the torsion spring can provide pressure to the check valve 6 so that the sealing structure 303 fits the check valve 6 .

[0060] The torsion spring can be fixedly connected between the drainage mechanism and the check valve 6, or can be detachably connected between the drainage mechanism and the check valve 6. In this embodiment, one end of the torsion spring is clamped with the drainage connector 3, and the other end of the torsion spring is clamped with the check valve 6.

[0061] The elastic force of the torsion spring can apply pressure to the check valve 6 , causing the check valve 6 to fit onto the sealing structure 303 , thereby achieving a closed seal between the check valve 6 and the sealing structure 303 .

[0062] Example 2

[0063] The dishwasher provided in this embodiment includes the backflow prevention assembly provided in Example 1. When drainage is required, the check valve 6 is opened under the drive of the drain pump 2, and the water at the bottom of the sink 102 is discharged to the outside of the dishwasher through the drain mechanism. After the drainage requirement is completed, the check valve 6 is magnetically sealed with the sealing structure 303, or the check valve 6 is sealed with the sealing structure 303 under the action of external pressure, thereby preventing the water in the drain mechanism from flowing back into the sink 1. After the drainage requirement is completed, the check valve 6 is magnetically engaged with the sealing structure 303, thereby achieving a closed seal between the check valve 6 and the sealing structure 303. This improves the backflow prevention effect of the check valve 6 and reduces the problem of excessive backflow of water from the bottom of the sink 102 due to the check valve 6's own contour error, material aging, and uncertain water pressure in the drain mechanism.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A backflow prevention component, characterized in that: including a drainage mechanism and a check valve (6); The drainage mechanism has a sealing structure (303); The check valve (6) is connected to the drainage mechanism, and the check valve (6) and the sealing structure (303) are arranged opposite to each other; the sealing structure (303) and the check valve (6) can be attached to each other by magnetic attraction or pressure, so that the check valve (6) and the sealing structure (303) are closed and sealed; The sealing surface of the check valve (6) is a structure in which a peripheral annular plane transitions to a central spherical surface, the mating surface of the sealing structure (303) is an annular plane, the outer contour of the sealing structure (303) is sleeve-shaped, and the sealing surface of the check valve (6) fits the mating surface of the sealing structure (303). The sealing surface of the check valve (6) is plane-sealed with the mating surface of the sealing structure (303), and transitions to a central spherical surface that is embedded in the sealing structure (303) to achieve embedded sealing; The drainage mechanism comprises a drainage channel (101) and a drainage joint (3); The drainage joint (3) is arranged at the end of the drainage channel (101), the sealing structure (303) is formed on the drainage joint (3), and the check valve (6) is connected to the drainage joint (3); The clamping interface (601) of the check valve (6) and the clamping buckle (302) of the drain connector (3) are clamped together, thereby limiting the axial and radial position of the check valve (6); The card interface (601) of the check valve (6) has elastic deformation capability.

2. The backflow prevention assembly according to claim 1, characterized in that: A magnetic component (4) is provided inside the sealing structure (303).

3. The backflow prevention assembly according to claim 2, characterized in that: The magnetic member (4) is annular or arc-shaped.

4. The backflow prevention assembly according to claim 1, characterized in that: A metal part (5) capable of being attracted by the magnetic part (4) is provided inside the check valve (6).

5. The backflow prevention assembly according to claim 4, characterized in that: The check valve (6) is made of rubber or plastic.

6. The backflow prevention assembly according to claim 1, characterized in that: The drainage joint (3) is provided with a first limiting member (301), and the drainage channel (101) is provided with a second limiting member (103). The first limiting member (301) and the second limiting member (103) are cooperatively connected to limit the circumferential rotation of the drainage joint (3).

7. The backflow prevention assembly according to claim 1, characterized in that: A torsion spring is provided between the drainage mechanism and the check valve (6), and the torsion spring can provide pressure to the check valve (6) so that the sealing structure (303) fits the check valve (6).

8. A dishwasher, characterized in that: The invention comprises the backflow prevention assembly according to any one of claims 1 to 7.

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