A dishwasher with a double check valve structure and a dishwasher

Abstract

This utility model discloses a double check valve structure for a dishwasher and a dishwasher. The double check valve structure includes a water cup, a drain pump, and a drain pipe. The drain pipe is located between the drain pump and the water cup. Wastewater in the water cup is discharged from the drain pipe through the drain pump. The double check valve structure further includes: a first check valve structure located at the drain outlet of the drain pipe, used to close the drain outlet when the drain pump is turned off; and a second check valve plate located at the drain pump inlet of the water cup, used to close the drain pump inlet when the drain pump is turned off. This improves the odor prevention and backflow prevention effect of the double check valve structure for the dishwasher.

Description

Technical Field

[0001] This utility model belongs to the field of dishwasher technology, and more specifically, it relates to a double check valve structure for a dishwasher and a dishwasher. Background Technology

[0002] With economic development and improved living standards, dishwashers have become commonplace in households. Dishwashers are automatic cleaners for bowls, chopsticks, plates, dishes, knives, forks, and other tableware. They clean dishes more thoroughly than by hand, featuring a heating and sterilization function that kills bacteria such as E. coli, Staphylococcus aureus, and hepatitis B virus. Sometimes, dishes have small, hard-to-reach areas that are difficult to clean by hand, but a dishwasher can clean them all. Dishwashers not only clean more effectively but also save time, with the entire process taking only a few minutes. Compared to hand washing, dishwashers save users considerable time and free up their hands.

[0003] Currently, dishwashers on the market are generally divided into three types: countertop, cabinet, and sink-mounted. Countertop dishwashers are freestanding units that are typically placed on a countertop. Cabinet dishwashers are also freestanding but need to be integrated into kitchen cabinets. Sink-mounted dishwashers are integrated with the sink and are usually installed in kitchen cabinets. Cabinet dishwashers generally require a water cup assembly to achieve water circulation.

[0004] However, the check valve in existing dishwashers is usually installed in the drain pipe to prevent backflow and odor. However, when wastewater is discharged from the water cup, some wastewater will inevitably remain between the drain pump and the water cup. This wastewater will flow back into the water cup, and over time the entire dishwasher will emit odors and breed bacteria. Utility Model Content

[0005] To address the problem of residual wastewater flowing back into the water cup between the drain pump and the water cup, causing odors and bacterial growth in the dishwasher, this invention aims to provide a double check valve structure for dishwashers. The double check valve structure includes a water cup, a drain pump, and a drain pipe. The drain pipe is located between the drain pump and the water cup, and wastewater in the water cup is discharged through the drain pump and drain pipe. The double check valve structure further includes: a first check valve structure located at the drain outlet of the drain pipe, used to close the drain outlet when the drain pump is turned off; and a second check valve plate located at the drain pump inlet in the water cup, used to close the drain pump inlet when the drain pump is turned off.

[0006] Compared to existing technologies, this technical solution achieves the following advantages: By installing a first check valve at the drain outlet of the drain pipe and a second check valve at the drain pump inlet, a double check valve structure is formed. This double-layered check valve system effectively prevents odors and backflow. The first check valve prevents wastewater from flowing back into the dishwasher from the end of the drain pipe. The second check valve at the drain pump inlet prevents residual wastewater between the drain pump and the water cup from flowing back into the water cup when the drain pump is off, thus avoiding odors and bacterial growth, and improving the user experience.

[0007] Furthermore, the water pump drain outlet is equipped with a blocking device to prevent large pieces of debris from entering.

[0008] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: By installing a blocking component at the drain pump inlet, large pieces of residue can be prevented from entering the drain check pipe between the drain pump and the water cup. Residue in the drain check pipe between the drain pump and the water cup can cause blockages, bacterial growth, and odors; or hinder the normal operation of the drain pump and affect the normal wastewater discharge process of the dishwasher, thus ensuring the operational stability of the dishwasher's wastewater discharge.

[0009] Furthermore, the blocking element is a partition plate.

[0010] Furthermore, the blocking member is provided with a valve plate mounting component, and the second check valve plate is detachably mounted on the side of the blocking member near the drain pump via the valve plate mounting component.

[0011] Furthermore, the second check valve plate includes an integrally formed second mounting part, a second connecting part, and a second check part; the second mounting part is mounted on the blocking member, and the second connecting part connects the second check part and the second mounting part; wherein, when the drain pump is closed, the second check part is in a sealed position, and the second check part closes the drain pump inlet; when the drain pump is working, the second check part is in an open position to allow wastewater to enter the drain pipe through the drain pump inlet.

[0012] Compared with existing technologies, the technical advantages of this solution are as follows: The second check valve plate is installed at the inlet of the drainage pump via the second mounting part. The opening or closing of the drainage pump inlet is achieved by the flipping of the second check part. Compared with on / off valves that rely on signal switches, the second check valve plate is opened by water flow and then closed by its own elasticity and gravity, resulting in a faster response speed, simpler structure, and lower production and maintenance costs. By making the second mounting part, second connecting part, and second check part integrally formed, the sealing performance of the second check valve plate can be improved, and the production and processing costs can be reduced.

[0013] Furthermore, the second check valve plate achieves the switching of the check part between the open position and the sealed position through the deformation of the second connecting part.

[0014] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: compared with the hinge to achieve the flipping of the second check part relative to the second mounting part, the deformation of the second connecting part is used to achieve the flipping of the second check part, the valve body structure is simpler, and the production and maintenance costs are lower.

[0015] Furthermore, the second check valve plate is a rubber valve plate.

[0016] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the rubber valve plate automatically closes (physical deformation) to cut off the backflow path by relying on the gravity of the wastewater itself or the negative pressure after the pump stops, with a short response time; and the rubber valve plate has a lifespan of up to 10 years, resulting in low maintenance costs.

[0017] Furthermore, the first check structure includes a check valve seat and a first check valve plate mounted on the check valve seat; wherein, the top of the check valve seat has a first valve plate mounting position, the first valve plate mounting position is provided with a mounting post, and the first check valve plate is mounted on the check valve seat through the mounting post.

[0018] Furthermore, the first check valve plate includes an integrally formed first valve plate body, a first connecting part, and a first mounting part; the first connecting part connects the first valve plate body and the first mounting part, and the first mounting part has a mounting hole; wherein, when the first check valve plate is installed on the check valve seat, the first mounting part is engaged in the first valve plate mounting position, and the mounting post is located in the mounting hole.

[0019] Furthermore, the first check valve disc is a rubber disc mounted on the check valve seat.

[0020] Furthermore, the water distribution valve is installed at the bottom of the water cup via positioning and fixing components.

[0021] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: by setting up positioning components, the fixed components can be pre-positioned, making installation more convenient and faster.

[0022] Furthermore, the positioning components include a first positioning component and a second positioning component. The first positioning component includes a positioning post and a positioning hole; the second positioning component is an elastic buckle.

[0023] This utility model provides a dishwasher, including any of the aforementioned double check structure for dishwashers, and can achieve the same effect. To avoid repetition, it will not be described again here. Attached Figure Description

[0024] Figure 1This is a schematic diagram of a double check valve structure for a dishwasher provided by this utility model; Figure 2 yes Figure 1 Schematic diagram of the structure of the medium-sized water cup; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 yes Figure 1 A schematic diagram of a dishwasher with a double check valve structure without a drain pump installed. Figure 5 yes Figure 1 A schematic diagram of a dishwasher with a double check valve structure without a drain pump and a second check valve plate. Figure 6 yes Figure 4 Schematic diagram of the structure of the second check valve plate; Figure 7 yes Figure 6 Front view of the second check valve plate; Figure 8 yes Figure 1 A schematic diagram of the first check valve structure in the middle; Figure 9 yes Figure 8 Explosion diagram of the first check valve structure; Figure 10 yes Figure 9 A schematic diagram of the structure of the first check valve plate; Figure 11 This is a schematic diagram showing the connection between the water cup and the water distribution valve housing; Figure 12 yes Figure 11 Enlarged view of point B in the middle; Figure 13 yes Figure 11 Schematic diagram of the structure of the medium-sized water cup; Figure 14 yes Figure 13 Enlarged view of point C in the middle; Figure 15 yes Figure 11 Schematic diagram of the structure of the center-distribution valve housing; Figure 16 yes Figure 15 Enlarged view of point D in the middle.

[0025] In the picture: 10. Water cup; 20. Water collection tank; 21. Drain pump inlet; 22. Divider plate; 23. Valve plate mounting component; 30. Second check valve plate; 31. Second mounting part; 32. Second connecting part; 33. Second check part; 34. Second mounting hole; 40. Drain pipe; 50. First check structure; 51. Check valve seat; 511. First valve plate mounting position; 512. Mounting column; 52. First check valve plate; 521. First mounting part; 522. First connecting part; 523. First valve plate body; 524. First mounting hole; 60. Drain pump; 70. Divider valve housing; 81. Positioning pin; 82. Positioning hole; 83. Elastic snap; 84. Snap mounting seat; 85. Fixed threaded hole. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0027] See Figure 1 This is a structural schematic diagram of a double check valve structure for a dishwasher provided by this utility model. Combined with... Figures 1 to 16 The dishwasher uses a double check structure, which includes, for example, a water cup 10, a drain pump 60, a drain pipe 40, a first check structure 50, and a second check valve plate 30.

[0028] Combination Figures 1 to 7 The water cup 10 includes a downwardly recessed water collection tank 20, and a drain pump inlet 21 is provided on the tank wall near the bottom of the tank. The drain pipe 40 is located between the drain pump 60 and the drain pump inlet 21. After the dirty water from the dishwasher is collected in the water collection tank 20 at the bottom of the water cup 10, the drain pump 60 sucks the wastewater in the water collection tank 20 out of the drain pump inlet 21 and discharges it from the drain pipe 40.

[0029] In one specific embodiment, a first check valve 50 is disposed at the drain outlet of the drain pipe 40. When the drain pump 60 is turned off, it closes the drain outlet of the drain pipe 40 to prevent sewage from flowing back into the dishwasher from the end of the drain pipe 40, thus preventing odor and backflow. A second check valve 30 is disposed at the drain pump inlet 21 of the water cup 10. When the drain pump 60 is operating, the water pressure opens the second check valve 30, and sewage is discharged from the drain pump inlet 21. When the drain pump 60 stops operating, the second check valve 30 falls under its own weight or elasticity, closing the drain pump inlet 21 and preventing sewage from flowing back into the dishwasher, thus preventing odor and backflow.

[0030] Understandably, by installing a first check valve 50 at the drain outlet of the drain pipe 40 and a second check valve 30 at the drain pump inlet 21, a double check valve structure can be formed. This double-layered check valve provides better odor prevention and backflow prevention. It also prevents residual wastewater between the drain pump 60 and the water cup 10 from flowing back into the water cup 10, which could cause odors, bacterial growth, and negatively impact the dishwasher user experience.

[0031] Furthermore, a blocking component is provided at the drain pump inlet 21 to prevent large pieces of residue from entering the drain check pipe between the drain pump 60 and the water cup 10. This blocking component can be a filter screen, a grille, or a baffle; there are no limitations on its use. Understandably, by providing a blocking component at the drain pump inlet 21, large pieces of residue can be prevented from entering the drain check pipe between the drain pump 60 and the water cup 10. Residue in the drain check pipe between the drain pump 60 and the water cup 10 can cause blockages, leading to bacterial growth, odors, or hindering the normal operation of the drain pump 60, thus affecting the normal wastewater discharge process of the dishwasher and ensuring the operational stability of the dishwasher's wastewater discharge.

[0032] In one specific embodiment, the blocking element is a partition plate 22. For example, two partition plates 22 are evenly spaced along the length of the drain pump inlet 21, dividing the drain pump inlet 21 into three smaller drain pump inlets 21. When the drain pump 60 is operating, the partition plates 22 can prevent large pieces of residue in the water cup 10 from entering the drain pump inlet 21, thus preventing large pieces of residue from being sucked into the subsequent wastewater discharge pipeline by the drain pump 60.

[0033] Furthermore, the blocking member is provided with a valve plate mounting member 23, and the second check valve plate 30 is detachably mounted on the side of the blocking member near the drain pump 60 via the valve plate mounting member 23. For example, the valve plate mounting member 23 is located on the mounting side of the drain pump 60, and the second check valve plate 30 can be replaced by removing the drain pump 60.

[0034] In one specific embodiment, the second check valve plate 30 is a rubber valve plate, which is opened by water flow and then closed by its own elasticity and gravity. Compared with on / off valves that rely on signal switches, the rubber valve plate has a lifespan of up to 10 years and does not require maintenance or circuit repair. The production and maintenance costs of the rubber check valve are also lower. In addition, the valve body has a simple structure, and the high-pressure water flow can automatically flush away attached dirt, making it easy to clean.

[0035] In one specific embodiment, the valve plate mounting member 23 consists of two mounting posts protruding from the partition plate 22, and the second check valve plate 30 has two second mounting holes 34. For example, the inner diameter of the second mounting hole 34 is smaller than the outer diameter of the mounting post, and the second mounting hole 34 and the mounting post are interference-fitted. Alternatively, the end of the valve plate mounting member 23 is provided with a blocking member to prevent the second check valve plate 30 from falling off the mounting post.

[0036] Furthermore, the second check valve plate 30 includes an integrally formed second mounting portion 31, a second connecting portion 32, and a second check portion 33; the second mounting portion 31 is mounted on the blocking member, and the second connecting portion 32 connects the second check portion 33 and the second mounting portion 31. For example, the drain pump inlet 21 and the second check valve plate 30 have the same shape, both being rectangular. The area of ​​the second check portion 33 is larger than the area of ​​the drain pump inlet 21, the second connecting portion 32 connects the second check portion 33 and the second mounting portion 31, and two second mounting holes 34 are formed on the second mounting portion 31, allowing the second check portion 33 to be flipped upwards via the second connecting portion 32. In one specific embodiment, the width of the second check portion 33 is the same as the width of the second mounting portion 31, and the width of the second connecting portion 32 is smaller than the width of the second check portion 33, to facilitate the flipping of the second check portion 33.

[0037] In one specific embodiment, the second check valve plate 30 achieves the switching of the second check part 33 between an open position and a sealed position through the elastic deformation of the second connecting part 32. Specifically, when the drain pump 60 is off, the second check part 33 is in the sealed position, and the second check valve plate 30 closes the drain pump inlet 21; when the drain pump 60 is working, the second check part 33 is in the open position, allowing wastewater to enter the drain pipe through the drain pump inlet 21.

[0038] It is understandable that by making the second mounting part 31, the second connecting part 32, and the second check part 33 integrally formed, the sealing performance of the second check valve plate 30 can be improved, and the production and processing costs can be reduced.

[0039] Furthermore, in combination Figures 8 to 10The first check valve structure 50 includes a check valve seat 51 and a first check valve disc 52 mounted on the check valve seat 51. The top of the check valve seat 51 has a first valve disc mounting position 511, and the first valve disc mounting position 511 has a mounting post 512. The first check valve disc 52 is mounted on the check valve seat 51 via the mounting post 512. Further, the first check valve disc 52 includes an integrally formed first valve disc body 523, a first connecting portion 522, and a first mounting portion 521. The first connecting portion 522 connects the first valve disc body 523 and the first mounting portion 521, and the first mounting portion 521 has a mounting hole. When the first check valve disc 52 is mounted on the check valve seat 51, the first mounting portion 521 is engaged within the first valve disc mounting position 511, and the mounting post 512 is located within the first mounting hole 524. For example, the cross-section of the first valve plate mounting position 511 is arc-shaped, and the shape of the first mounting part 521 corresponds to that of the first valve plate mounting position 511; the shape of the first valve plate body 523 is circular, and the width of the first connecting part 522 is less than the length of the first mounting part 521, so as to facilitate the flipping of the first valve plate body 523.

[0040] Preferably, the first check valve plate 52 is a rubber valve plate mounted on the check valve seat 51.

[0041] Furthermore, in combination Figures 11 to 16 The water distribution valve housing 70 is mounted on the bottom of the water cup 10 via a positioning component and a fixing component.

[0042] The positioning components include a first positioning component and a second positioning component. The first positioning component is an insertion positioning component; the second positioning component is a snap-fit ​​positioning component. For example, the first positioning component includes a positioning pin 81 and a positioning hole 82 that cooperate with each other. The second positioning component includes a resilient snap 83 and a snap-fit ​​mounting base 84 that cooperate with each other. The fixing component is a fixing threaded hole 85.

[0043] In one specific embodiment, the bottom of the water cup 10 is provided with a water distribution valve mounting position, and a positioning post 81, a snap-fit ​​mounting seat 84 and a plurality of fixing threaded holes 85 are provided around the water distribution valve mounting position; the water distribution valve housing 70 is provided with a positioning hole 82 corresponding to the positioning post 81, an elastic snap 83 corresponding to the snap-fit ​​mounting seat 84, and a plurality of fixing threaded holes 85.

[0044] During installation, first insert the positioning pin 81 into the positioning hole 82, then snap the elastic buckle 83 into the buckle mounting base 84, positioning the water valve housing 70 at the water valve mounting position at the bottom of the water cup 10. At this time, the multiple fixing threaded holes 85 on the water cup 10 are aligned with the multiple fixing threaded holes 85 on the water valve housing 70. Then, fix it with multiple threaded connectors to achieve the installation between the water valve housing 70 and the water cup 10.

[0045] Furthermore, this utility model provides a dishwasher, including any of the aforementioned double check structure for dishwashers, and achieving the same effect. To avoid repetition, it will not be described again here.

[0046] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A double check structure for a dishwasher, characterized by, The dishwasher double check valve structure includes a water cup, a drain pump, and a drain pipe. The drain pipe is located between the drain pump and the water cup. Wastewater in the water cup is discharged from the drain pipe through the drain pump. The dishwasher double check valve structure also includes: The first check valve is installed at the drain outlet of the drainage pipe to close the drain outlet when the drainage pump is turned off. The second check valve plate is installed at the inlet of the drain pump in the water cup and is used to close the inlet of the drain pump when the drain pump is turned off.

2. The double check structure for a dish washer according to claim 1, wherein The inlet of the drainage pump is equipped with a baffle to prevent large pieces of debris from entering.

3. The double check structure for a dish washer according to claim 2, wherein The blocking component is a partition plate.

4. The double check valve structure for a dishwasher according to claim 2, characterized in that, The blocking component is equipped with a valve plate mounting component, and the second check valve plate is detachably mounted on the side of the blocking component near the drain pump via the valve plate mounting component.

5. The double check structure for a dish washer according to claim 2, wherein The second check valve plate includes an integrally formed second mounting part, a second connecting part, and a second check part; the second mounting part is mounted on the blocking member, and the second connecting part connects the second check part and the second mounting part; wherein, when the drain pump is closed, the second check part is in the sealed position, and the second check part closes the drain pump inlet; when the drain pump is working, the second check part is in the open position to allow wastewater to enter the drain pipe through the drain pump inlet.

6. The double check valve structure for a dishwasher according to claim 5, characterized in that, The second check valve plate achieves the switching of the second check part between the open position and the sealed position through the deformation of the second connecting part.

7. The double check structure for a dish washer according to claim 5, wherein The second check valve plate is a rubber valve plate.

8. The double check structure for a dish washer according to claim 1, wherein The first check valve structure includes a check valve seat and a first check valve plate mounted on the check valve seat; wherein, the top of the check valve seat has a first valve plate mounting position, the first valve plate mounting position is provided with a mounting post, and the first check valve plate is mounted on the check valve seat through the mounting post.

9. The double check valve structure for a dishwasher according to claim 8, characterized in that, The first check valve plate includes an integrally formed first valve plate body, a first connecting part, and a first mounting part; the first connecting part connects the first valve plate body and the first mounting part, and the first mounting part has a mounting hole; wherein, when the first check valve plate is installed on the check valve seat, the first mounting part is engaged in the first valve plate mounting position, and the mounting post is located in the first mounting hole.

10. The double check structure for a dish washer according to claim 8, wherein The first check valve disc is a rubber valve disc installed on the check valve seat.

11. The double check structure for a dish washer according to claim 1, wherein The water distribution valve housing is mounted on the bottom of the water cup via positioning and fixing components.

12. The double check structure for a dish washer according to claim 9, wherein The positioning components include a first positioning component and a second positioning component. The first positioning component is a plug-in positioning component, and the second positioning component is a snap-in positioning component.

13. A dishwasher, characterized in that The dishwasher includes a double check structure for a dishwasher as described in any one of claims 1-12.

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