Drainage device of washing equipment and washing equipment

Abstract

The invention provides a drainage device of washing equipment and the washing equipment, the drainage device of the washing equipment comprises a drainage pipe, at least a part of pipe section of the drainage pipe extends upwards along the drainage direction, an anti-reflux assembly is arranged in the pipe section extending upwards, and the anti-reflux assembly is provided with a cavity for accommodating reflux water. The anti-backflow assembly is arranged in the pipe section, extending upwards, of the drainage pipe, and the cavity formed in the anti-backflow assembly is used for containing backflow water to increase the weight of the anti-backflow assembly, so that the sealing performance of the anti-backflow assembly is improved, sewage is effectively prevented from flowing back into the washing equipment in the drainage process, and the service life of the washing equipment is prolonged. The reliability of the drainage device of the washing equipment is guaranteed, meanwhile, the production cost is low, and the economical efficiency of the drainage device of the washing equipment is improved.

Description

Technical Field

[0001] This invention belongs to the field of washing equipment technology, specifically relating to a drainage device and washing equipment for washing equipment. Background Technology

[0002] With the widespread use of household appliances and people's increasing demands for quality of life, modern laundry equipment has become an essential appliance for many families. Through automated washing and drying processes, laundry equipment greatly reduces the burden of housework and improves living efficiency and hygiene.

[0003] However, the drainage systems in existing washing machines often have shortcomings in terms of sealing performance. Traditional drain pipe designs typically employ simple bends or the installation of check valves, which, while preventing backflow to some extent, still present numerous problems in practical use. This not only affects the cleaning effectiveness of the washing machine but may also lead to the growth of bacteria inside, endangering the health of family members.

[0004] In particular, due to insufficient sealing, existing washing equipment's drainage system may experience backflow of wastewater during drainage, leading to secondary pollution and affecting the cleaning effect on the clothes being washed and the user experience. Furthermore, using complex sealing structures or expensive check valves not only increases manufacturing costs but may also reduce sealing performance due to component wear, increasing maintenance difficulty.

[0005] Therefore, providing a drainage device for washing equipment that can effectively prevent sewage backflow has become a technical problem that urgently needs to be solved by those skilled in the art.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a drainage device for washing equipment, thereby solving the problem that sewage backflow is prone to occur in the drainage devices of existing washing equipment.

[0008] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0009] A drainage device for a washing machine includes a drain pipe, at least a portion of which extends upward along the drainage direction. An anti-backflow component is provided within the upwardly extending section, and the anti-backflow component has a cavity for accommodating backflow water.

[0010] Furthermore, the anti-backflow component has a columnar structure; the cavity for containing the backflow water is a weight-increasing trough located on the top of the columnar structure, with the opening of the weight-increasing trough facing upwards;

[0011] Preferably, the anti-backflow component moves along the direction of gravity to close the drain pipe.

[0012] Furthermore, a water-pressing structure is installed in the upward-extending pipe section, which is positioned opposite to the weight-adding tank, to discharge the backflow water in the weight-adding tank when the anti-backflow component is opened;

[0013] Preferably, the water-pressing structure and the opening of the weight-adding tank are arranged opposite each other, and the anti-backflow component moves upward under the impact of the drainage water flow, and the weight-adding tank is at least partially fitted onto the water-pressing structure.

[0014] Furthermore, the cross-section of the weight-adding tank gradually decreases towards the bottom of the tank, and the water-pressurizing structure is a column with a cross-section smaller than that of the weight-adding tank.

[0015] Preferably, when the anti-backflow component is opened, the wall of the weight-adding tank is spaced apart from the peripheral wall of the water-pressurizing structure.

[0016] Furthermore, the weight-adding tank is provided with multiple sections distributed circumferentially along the anti-backflow component;

[0017] Preferably, the anti-backflow component and the upwardly extending pipe section are circumferentially restrained, and / or, when the anti-backflow component is closed, the lower end of the pressure water structure extends at least partially to the inner circumference of the weight-adding tank opening.

[0018] Furthermore, the upper end of the upward-extending pipe section is sealed, and the anti-backflow component seals the lower end of the upward-extending pipe section under the action of gravity.

[0019] Preferably, the inner diameter of the lower end of the upwardly extending pipe section gradually decreases from top to bottom, the shape of the anti-backflow component is adapted to the shape of the lower end of the upwardly extending pipe section, and under the action of gravity, the anti-backflow component is fitted into the lower end of the upwardly extending pipe section.

[0020] Preferably, the water pressure structure is located on the inner side of the upper end of the upwardly extending pipe section.

[0021] Furthermore, the anti-backflow component includes: a limiting part; and a sealing part, which is connected to the limiting part and has the same shape as the lower end of the upwardly extending pipe section.

[0022] Preferably, a gap is provided between the outer periphery of the limiting part and the inner side of the upwardly extending pipe section;

[0023] Preferably, the drain pipe further includes a first pipe section disposed downstream of the upwardly extending pipe section along the drainage direction, the first pipe section being connected to the periphery of the upwardly extending pipe section; when the anti-backflow component is in a closed state, the upper end face of the limiting part is lower than the connection point between the first pipe section and the upwardly extending pipe section.

[0024] Furthermore, the top of the limiting part is provided with a rib, which is used to abut against the inner side of the upper end of the upwardly extending pipe section when the anti-backflow component is opened.

[0025] Furthermore, a guide structure is installed inside the drain pipe to guide the anti-backflow component;

[0026] Preferably, the guiding structure includes a first guide post disposed at the bottom of the anti-backflow component, and a second guide post disposed in a second pipe section that is connected downstream along the drainage direction of the upwardly extending pipe section, the first guide post and the second guide post being sleeved on each other; preferably, the first guide post and the second guide post are circumferentially limited to each other.

[0027] Another object of the present invention is to provide a washing device with a drainage device installed thereon.

[0028] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0029] 1. This invention provides an anti-backflow component within the upwardly extending section of the drain pipe. The anti-backflow component has a cavity for accommodating backflow water. The cavity containing backflow water increases the weight of the anti-backflow component, thereby enhancing its sealing performance. This effectively prevents sewage from flowing back into the washing equipment during drainage, ensuring smooth drainage and the hygiene of the equipment. At the same time, the simple structural design reduces production costs and improves the economic efficiency of the drainage device.

[0030] 2. By providing a gap between the outer periphery of the limiting part and the inner side of the upwardly extending pipe section, the present invention can ensure that food residue can be smoothly discharged through the gap during the drainage process, effectively reducing the retention of food residue in the drainage channel, improving drainage efficiency, and at the same time preventing the anti-backflow component from getting stuck, reducing the friction when the anti-backflow component moves, and ensuring smooth system operation.

[0031] 3. The present invention provides a circumferentially extending and radially protruding limiting structure on the inner side of the upwardly extending pipe section, which is used to circumferentially limit the cooperation between the anti-backflow component and the upwardly extending pipe section, and the limiting is achieved by the contact between the limiting part and the limiting structure.

[0032] 4. This invention features an upper pipe section whose lower end is fitted around the outer periphery of the upper end of a lower pipe section. This ensures a tight connection between the two sections while also acting as a limiting structure for the lower pipe section's opening. This effectively restricts the position of the anti-backflow component, ensuring stable operation when closed. Furthermore, the fitted design facilitates maintenance and replacement, improving the maintainability of the drainage device. Additionally, the lower pipe section has circumferentially extending reinforcing ribs on its outer side, enhancing its structural strength and stability, preventing deformation under high water pressure or external forces, and ensuring the system's reliability and long-term use.

[0033] 5. The present invention provides a sealing sleeve on the outer periphery of the sealing part of the anti-backflow component, thereby ensuring a good sealing effect when the anti-backflow component is in the closed state and effectively preventing sewage backflow.

[0034] 6. The present invention provides a guide structure inside the drain pipe to guide the anti-backflow component, thereby limiting the rotation of the anti-backflow component and ensuring its stability when moving up and down, thus preventing water flow disturbance from causing the anti-backflow component to shift position or rotate.

[0035] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0036] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0037] Figure 1 This is a schematic diagram of the overall structure of the drainage pipe in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the overall structure of the anti-backflow component in the open state in an embodiment of the present invention;

[0039] Figure 3 for Figure 2 A schematic diagram of the overall structure cross-section;

[0040] Figure 4 This is a schematic cross-sectional view of the anti-backflow component in a closed state in an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the overall structure of the anti-backflow component in an embodiment of the present invention.

[0042] Description of main components in the diagram:

[0043] 1. Drainage pipe; 10. Upward extending pipe section; 101. Upper pipe section; 102. Lower pipe section; 11. First pipe section; 12. Second pipe section; 2. Anti-backflow component; 20. Weighting groove; 21. Limiting part; 211. Raised rib; 22. Sealing part; 221. Sealing sleeve; 222. Reinforcing rib; 23. Limiting structure; 3. Water pressure structure; 4. Guide structure; 41. First guide post; 42. Second guide post.

[0044] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] like Figures 1 to 5 As shown, this embodiment of the invention discloses a drainage device for a washing machine. The drainage device includes a drain pipe 1, with at least a portion of the drain pipe 1 extending upwards along the drainage direction to form a drain pipe 1 with a curved portion. An anti-backflow component 2 is provided within the upwardly extending pipe section 10, and the anti-backflow component 2 has a cavity for accommodating backflow water. Specifically, if backflow occurs during the drainage process of the washing machine due to factors such as the drain valve not being completely closed or changes in household water pressure, the backflow water will enter the cavity of the anti-backflow component 2, increasing the weight of the anti-backflow component 2 to enhance the sealing between the anti-backflow component 2 and the drain pipe 1, thereby effectively preventing backflow water from entering the washing machine. Preferably, the anti-backflow component 2 moves along the direction of gravity to seal the drain pipe 1.

[0049] In this embodiment, the drainage device is applicable to various types of washing equipment, such as washing machines, washer-dryers, and dishwashers. The following embodiments all use a dishwasher equipped with the drainage device as an example. Specifically, the dishwasher can include various models such as household dishwashers, commercial dishwashers, built-in dishwashers, or countertop dishwashers. Regardless of the specific type of dishwasher or the usage scenario, the drainage device ensures a smooth drainage process and effectively prevents wastewater backflow.

[0050] In this embodiment, one end of the dishwasher's drain pipe 1 is connected to the drain outlet inside the dishwasher, and the other end extends to the external drainage system of the dishwasher. Furthermore, the anti-backflow component 2 is installed inside the upwardly extending pipe section 10. The cavity of the anti-backflow component 2 accommodates the backflow water, and the weight of the backflow water increases the sealing of the anti-backflow component 2, thereby effectively preventing the backflow water from flowing back into the dishwasher.

[0051] like Figures 1 to 5 As shown, in this embodiment, the anti-backflow component 2 is a columnar structure disposed within the upwardly extending pipe section 10. It is used to seal the upwardly extending pipe section 10, ensuring good sealing performance and preventing sewage from flowing back into the dishwasher through gaps. The cavity for accommodating the backflow water is a weight-increasing groove 20 disposed at the top of the columnar structure, with the groove opening facing upwards. The groove opening effectively accommodates the backflow water, increasing the weight of the anti-backflow component 2 by utilizing the weight of the backflow water, thereby improving the sealing performance of the anti-backflow component 2 and enhancing the anti-backflow effect. Preferably, the anti-backflow component 2 seals the upwardly extending pipe section 10 under the action of gravity.

[0052] Specifically, in this embodiment, the weight-adding tank 20 has multiple sections distributed circumferentially along the anti-backflow component 2 to ensure uniform weight distribution of the columnar structure and uniform weight distribution after the return water enters the weight-adding tank 20. This ensures smooth vertical movement of the anti-backflow component 2 and improves its operational stability. Furthermore, the depth of the weight-adding tank 20 is specifically designed according to the structure of the anti-backflow component 2. It must ensure that the anti-backflow component 2 is in an open state when it moves upward, allowing water to flow smoothly out of the drain pipe 1. Based on these conditions, the weight-adding tank 20 is designed to be as deep as possible to effectively accommodate sufficient return water without affecting the overall space utilization of the dishwasher. Of course, the weight-adding tank 20 can also be a single unit; the specific number depends on the specific structure and location of the anti-backflow component 2, and other specific scenarios.

[0053] In addition, the inner wall of the weight-increasing tank 20 can be made of corrosion-resistant material to enhance its durability. To optimize the anti-backflow effect, the bottom of the weight-increasing tank 20 can be designed to be concave to increase water capacity and improve stability. Furthermore, the design of the weight-increasing tank 20 should ensure that it is not easily blocked under normal operating conditions, guaranteeing smooth water flow. Through the above design, the anti-backflow component 2 can not only effectively prevent sewage backflow, but also improve the reliability and performance of the dishwasher during use.

[0054] More specifically, in this embodiment, the opening of the weight-adding tank 20 is approximately trapezoidal, and the side length of the opening closer to the axis of the columnar structure is smaller than the side length of the opening farther from the axis of the columnar structure, which can guide the return water into the weight-adding tank 20.

[0055] In some specific embodiments, the width of the opening of the weight-adding tank 20 is greater than the width of its interior near the bottom of the tank. Furthermore, the cross-section of the weight-adding tank 20 gradually decreases along the direction near the bottom of the tank, which facilitates the discharge of the return water that enters the weight-adding tank 20.

[0056] Furthermore, the anti-backflow component 2 is a float. During drainage, as the water level rises, the float floats accordingly, automatically opening or closing. When the water level drops, the float sinks and returns to the closed state to cope with different water flow conditions and prevent backflow water from entering the dishwasher.

[0057] In another possible embodiment, the anti-backflow component 2 is designed to be non-floating on water and can be opened or closed by the drainage pressure during the drainage process. This allows the anti-backflow component 2 to be opened by the pressure during drainage, quickly expelling sewage. At the same time, after the drainage stops, the component will automatically return to the closed state due to gravity, preventing sewage from flowing back into the dishwasher.

[0058] In this embodiment, the upper end of the upward-extending pipe segment 10 is closed. When drainage is not in progress, the anti-backflow component 2 closes the lower end of the upward-extending pipe segment 10 under the influence of gravity. Specifically, when drainage stops, the anti-backflow component 2 will naturally fall and close the lower end of the upward-extending pipe segment 10 under the influence of gravity, thereby effectively preventing sewage from flowing back into the dishwasher and ensuring the cleanliness of the drain pipe 1.

[0059] Preferably, in this embodiment, the inner diameter of the lower end of the upwardly extending pipe segment 10 gradually decreases from top to bottom, and the shape of the anti-backflow component 2 is adapted to the shape of the lower end of the upwardly extending pipe segment 10. Under the action of gravity, the anti-backflow component 2 can fit into the lower end of the upwardly extending pipe segment 10, forming a stable sealing structure, further enhancing the anti-backflow function and effectively preventing sewage backflow.

[0060] like Figures 3 to 4 As shown in this embodiment, the upwardly extending pipe section 10 is also provided with a water pressure structure 3 that is disposed opposite to the weight-adding tank 20, which is used to discharge the backflow water in the weight-adding tank 20 when the anti-backflow component 2 is opened.

[0061] Specifically, in this embodiment, the water-pressing structure 3 is a column with a cross-section smaller than that of the weight-increasing tank 20. This design avoids an overly tight fit between the water-pressing structure 3 and the weight-increasing tank 20, preventing suction from being generated between them and thus affecting the normal descent of the anti-backflow component 2. This design ensures the flexibility and stability of the anti-backflow component 2 during drainage, preventing it from getting stuck in the upwardly extending pipe section 10 and ensuring its smooth movement. At the same time, it also improves the reliability of the entire system, effectively preventing operational malfunctions caused by suction.

[0062] Preferably, in this embodiment, the water-pressing structure 3 is disposed on the inner side of the upper end of the upwardly extending pipe section 10. Further, it extends downward from the inner side of the upper end of the upwardly extending pipe section 10; when the anti-backflow component 2 is opened, the wall of the weight-adding tank 20 is spaced apart from the peripheral wall of the water-pressing structure 3.

[0063] In a further preferred embodiment, the structure and quantity of the weight-adding tank 20 are configured to enhance the pressure on the return water in the weight-adding tank 20, and the return water in the weight-adding tank 20 can be smoothly discharged by being squeezed downward by the water pressure structure 3.

[0064] Preferably, in this embodiment, the water-pressing structure 3 and the opening of the weight-adding trough 20 are arranged opposite each other, and the anti-backflow component 2 moves upward under the impact of the drainage water flow, and the weight-adding trough 20 is at least partially fitted onto the water-pressing structure 3.

[0065] When the drainage device is in the process of draining, the water flow pushes the anti-backflow component 2 upward along the upward-extending pipe section 10. At this time, the anti-backflow component 2 is in the open state, and the weight-adding tank 20 is fitted onto the water-pressing structure 3. Furthermore, the water-pressing structure 3 applies pressure to the water in the weight-adding tank 20, causing the water in the weight-adding tank 20 to be squeezed out through the opening of the weight-adding tank 20 and discharged into the drain pipe 1, thus preventing water accumulation in the weight-adding tank 20.

[0066] Preferably, the anti-backflow component 2 and the upwardly extending pipe section 10 are engaged by a circumferential limiting structure 23 to ensure that the anti-backflow component 2 maintains correct positioning during the closing process and does not rotate or shift. And / or, when the anti-backflow component 2 is in the closed state, the lower end of the pressure structure 3 extends at least partially into the inner circumference of the groove of the weight-reinforcing tank 20 to provide additional limiting effect during drainage. This not only effectively prevents the anti-backflow component 2 from shifting position when closed, but also ensures a stable fit between the pressure structure 3 and the weight-reinforcing tank 20, further enhancing the sealing effect of the anti-backflow component 2 and improving the operational reliability of the entire drainage system.

[0067] In some possible embodiments, multiple water-pressing structures 3 can be configured, while the weight-adding tank 20 is designed as a single unit, fitted around the periphery of the multiple water-pressing structures 3. This ensures that air is present inside the weight-adding tank 20 when pressure is applied by the water-pressing structures 3 during drainage, thereby preventing the water-pressing structures 3 from adhering to the tank walls of the weight-adding tank 20 and thus preventing the downward movement of the anti-backflow component 2 from being affected by the adsorption force. This design improves the responsiveness of the anti-backflow component 2 and further enhances the anti-backflow performance and reliability of the dishwasher drainage device.

[0068] In another possible embodiment, the water-pressing structure 3 can be annular, and the corresponding weight-adding groove 20 can be set as an annular groove, which can prevent the rotation of the anti-backflow component 2 from causing the water-pressing structure 3 to fail to correspond with the weight-adding groove 20.

[0069] In another possible embodiment, the water pressure structure 3 is an integrally molded structure, including a base fixed on the inner wall of the upwardly extending pipe section 10 and a protrusion extending downward from the base; specifically, the base is correspondingly disposed on the top of the anti-backflow component 2, and extends downward to the protrusion corresponding to the weight-adding groove 20.

[0070] Furthermore, in the above possible embodiments, the base is detachably connected to the inner wall of the upwardly extending pipe segment 10, which simplifies the manufacturing process of the drain pipe 1, facilitates maintenance and replacement, and reduces production costs. At the same time, the detachable connection structure makes cleaning or replacement of the anti-backflow component 2 more convenient, improving the user experience.

[0071] like Figures 1 to 4 As shown, in this embodiment, the drain pipe 1 further includes a first pipe section 11 disposed downstream of the upwardly extending pipe section 10 along the drainage direction, and a second pipe section 12 disposed upstream along the drainage direction; the first pipe section 11 is connected to the periphery of the upwardly extending pipe section 10, and the periphery of the second pipe section 12 is connected to the lower end of the upwardly extending pipe section 10.

[0072] Specifically, in this embodiment, the anti-backflow component 2 includes a limiting part 21 and a sealing part 22. The limiting part 21 is connected to the sealing part 22, and the limiting part 21 is located at the upper end of the sealing part 22. The radial cross-section of the limiting part 21 is larger than the radial cross-section of the sealing part 22. The shape of the sealing part 22 is the same as the shape of the lower end of the upwardly extending pipe section 10, ensuring a tight seal when closed. At the same time, when draining, the impact force of the water flow can be better applied to the anti-backflow component 2 through the exposed lower end surface of the limiting part 21, thereby enhancing the thrust of the water flow on the anti-backflow component 2, increasing its buoyancy, and making the anti-backflow component 2 more easily opened by the water flow, thus improving drainage efficiency.

[0073] In one specific embodiment, a sealing sleeve 221 is fitted around the outer periphery of the sealing part 22 of the anti-backflow assembly 2, ensuring that the sealing part 22 elastically abuts against the inner side of the lower end of the downwardly extending pipe section, achieving a good sealing fit. When the anti-backflow assembly 2 is in the closed state, the sealing sleeve 221 enhances the sealing performance through elastic deformation, further ensuring that no water or dirt can flow back into the dishwasher, effectively improving the reliability of the drainage system and avoiding potential leakage problems. Of course, the sealing sleeve 221 can also be directly fixed to the inner side of the lower end of the downwardly extending pipe section, so that the sealing part 22 and the anti-backflow assembly 2 form an elastic abutment.

[0074] Preferably, a gap is provided between the outer periphery of the limiting part 21 and the inner side of the upwardly extending pipe section 10, which can ensure that food residue can be smoothly discharged through the gap during the drainage process, effectively reducing the retention of food residue in the drainage channel, improving drainage efficiency, and at the same time preventing the backflow prevention component 2 from getting stuck, reducing the friction when the backflow prevention component 2 moves, and ensuring smooth system operation.

[0075] Furthermore, when the anti-backflow component 2 is in a closed state, the upper end face of the limiting part 21 is lower than the connection point between the first pipe section 11 and the upwardly extending pipe section 10, thereby ensuring that the water flow can smoothly flow into the first pipe section 11 during drainage, and also helping to limit the anti-backflow component 2, improve the sealing and drainage effect of the anti-backflow component 2, and prevent sewage backflow.

[0076] like Figures 3 to 5 As shown, in this embodiment, the upper end face of the limiting part 21 is provided with a slightly upward-protruding rib 211, which is used to abut against the inner side of the closed upper end of the upward-extending pipe section 10 when the anti-backflow component 2 is opened, so that a gap is formed between the upper end face of the limiting part 21 and the inner side of the closed upper end of the upward-extending pipe section 10. When the anti-backflow component 2 reaches the highest position, the formed gap allows some water to pass through, preventing water from accumulating at the top of the anti-backflow component 2 and generating suction between it and the inner side of the closed upper end of the upward-extending pipe section 10, thus maintaining the smooth movement of the anti-backflow component 2. Furthermore, multiple ribs 211 are provided, evenly distributed circumferentially along the upper end face of the limiting part 21, so as not to affect the return water entering the weight-adding tank 20.

[0077] Furthermore, in the preferred embodiment described above, the closed end of the upwardly extending pipe segment 10 is higher than the connection point between the first pipe segment 11 and the upwardly extending pipe segment 10, which can further limit the anti-backflow component 2, ensuring the stability of the anti-backflow component 2 in the open state. At the same time, it effectively prevents the residue in the drain pipe 1 from accumulating at the connection point or around the anti-backflow component 2 during the drainage process, avoiding these residues from affecting the drainage process or causing blockage.

[0078] Preferably, in this embodiment, the inner side of the upwardly extending pipe segment 10 is provided with a circumferentially extending and radially protruding limiting structure 23, which is used to circumferentially limit the interaction between the anti-backflow component 2 and the upwardly extending pipe segment 10. The limiting is achieved by the contact between the limiting part 21 and the limiting structure 23. Preferably, the limiting structure 23 is annular, which enhances the sealing performance and effectively prevents the backflow of sewage, ensuring that the anti-backflow component 2 reliably remains closed under normal operating conditions.

[0079] Furthermore, the limiting structure 23 on the inner side of the upwardly extending pipe section 10 is a limiting ring. When the anti-backflow component 2 is in the closed state, the lower end of the limiting part 21 of the anti-backflow component 2 can fit tightly against the upper ring surface of the limiting ring, which can prevent the anti-backflow component 2 from shifting vertically during its up-and-down movement to a certain extent.

[0080] In another preferred embodiment, the upwardly extending pipe segment 10 includes an upper pipe segment 101 and a lower pipe segment 102. The lower end of the upper pipe segment 101 is fitted around the outer periphery of the upper end of the lower pipe segment 102, forming a tight connection. The opening of the lower pipe segment 102 serves as a limiting structure 23, abutting against the corresponding limiting part 21 on the anti-backflow component 2 to restrict the position of the anti-backflow component 2 and ensure that the anti-backflow component 2 remains in the closed state under normal circumstances. In addition, the lower end of the upper pipe segment 101 fitting around the outer periphery of the upper end of the lower pipe segment 102 also provides convenience when the anti-backflow component 2 needs maintenance or replacement, improving the maintainability of the overall drainage device. Furthermore, the upper pipe segment 101 and the lower pipe segment 102 are coaxially arranged and both extend vertically upward, making the movement path of the anti-backflow component 2 smoother. Furthermore, the lower pipe section 102 is provided with circumferentially extending reinforcing ribs 222 on its outer side to enhance the structural strength and stability of the lower pipe section 102, prevent deformation under high water pressure or other external forces, ensure the connection between the lower pipe section 102 and the upper pipe section 101, and further ensure the sealing performance.

[0081] In the above embodiments, the circumferentially extending reinforcing ribs 222 can be multiple evenly distributed or ring-shaped. Their number, shape, and spacing can be adjusted according to actual needs to ensure effective pressure distribution and improved pipeline load-bearing capacity during use. Simultaneously, the presence of the reinforcing ribs 222 also prevents the second pipe section 12 from sliding, ensuring a tight fit between the two and achieving a better sealing effect.

[0082] like Figures 3 to 5 As shown, in this embodiment, the drain pipe 1 is provided with a guide structure 4 for guiding the anti-backflow component 2, so as to limit the rotation of the anti-backflow component 2, ensure that it remains stable when moving up and down, and avoid water flow disturbance causing the anti-backflow component 2 to shift position or rotate.

[0083] Specifically, in this embodiment, the guide structure 4 includes a first guide post 41 disposed at the bottom of the anti-backflow component 2, and a second guide post 42 disposed in the second pipe section 12 downstream of the upwardly extending pipe section 10 along the drainage direction. The first guide post 41 and the second guide post 42 are sleeved together to guide the anti-backflow component 2 to move up and down along a predetermined path.

[0084] Preferably, the first guide post 41 and the second guide post 42 are circumferentially limited together. The first guide post 41 and the second guide post 42 are preferably non-circular structures, such as elliptical, square, or hexagonal shapes. The non-circular structure effectively prevents the anti-backflow component 2 from rotating under water pressure, while ensuring it is in the correct working position during drainage and backflow prevention, thereby improving the stability and anti-backflow effect of the drainage device. This effectively limits the rotation and offset of the anti-backflow component 2, while ensuring smooth opening and closing during drainage, thus improving the reliability and service life of the entire system.

[0085] In one specific embodiment, the first guide post 41 is a solid guide post, and the second guide post 42 is a hollow guide post. The hollow structure inside the hollow guide post matches the shape of the solid guide post. Furthermore, when the anti-backflow component 2 is opened, the first guide post 41 and the second guide post 42 always remain in an interlocked state, restricting the circumferential movement of the anti-backflow component 2. This ensures that the anti-backflow component 2 can only move vertically up and down, effectively preventing its rotation or offset and ensuring the normal opening and closing of the anti-backflow component 2. Of course, the second guide post 42 can also be a solid guide post, and the first guide post 41 can be a hollow guide post.

[0086] In a more preferred embodiment, the inner side of the upwardly extending pipe segment 10 is provided with guide ribs extending along its axial direction, and at least two guide ribs are provided arranged circumferentially and opposite to each other. The extension length of the guide ribs covers the entire moving path of the anti-backflow component 2. The limiting part 21 of the anti-backflow component 2 is provided with a groove that cooperates with the guide ribs to prevent the anti-backflow component 2 from deviating in the horizontal and vertical directions during the up and down movement during the drainage process, ensuring that it is always in the correct position, thereby improving the safety and reliability of the drainage device.

[0087] Of course, the guide groove can be set inside the upwardly extending pipe section 10, and the limiting part 21 of the anti-backflow component 2 can be provided with a buckle that cooperates with the guide groove. Alternatively, guide ribs and guide grooves can be arranged sequentially and at intervals along the circumference inside the upwardly extending pipe section 10, and the limiting part 21 can be provided with a snap-fit ​​structure that cooperates with the guide ribs and guide grooves. This is to limit the rotation and offset of the anti-backflow component 2, prevent the water pressure structure 3 from being unable to be pressed into the weight-adding groove 20 on the anti-backflow component 2, and prevent the anti-backflow component 2 from failing to close properly.

[0088] Furthermore, the height of the radially protruding guide rib is less than the height of the radially protruding limit structure 23 to ensure an effective sealing fit between the anti-backflow assembly 2 and the upwardly extending pipe section 10.

[0089] In this embodiment, the limiting structure 23 ensures that the anti-backflow component 2 remains closed during normal operation, effectively preventing sewage from entering the dishwasher. During drainage, when the water pressure reaches a preset value, the anti-backflow component 2 is pushed open by the water flow, allowing sewage to drain smoothly. This not only improves the dishwasher's drainage performance but also enhances the stability and reliability of the anti-backflow component 2, ensuring the normal operation of the equipment.

[0090] In some possible embodiments, the upwardly extending pipe segment 10 is a portion of the pipe segment arranged in the vertical direction, which may be a pipe segment with an elliptical inner cavity or a polygonal inner cavity, etc. The structure of the limiting part 21 on the anti-backflow component 2 is configured to match the shape of the inner cavity of the pipe segment in order to limit the horizontal displacement of the anti-backflow component 2.

[0091] In this embodiment, when drainage ends and water flow stops, the anti-backflow component 2 automatically resets under the weight of the water in the weight-increasing tank 20. The weight of the weight-increasing tank 20 helps the anti-backflow component 2 quickly return to the closed position. Combined with the sealing sleeve 221 and the limiting structure 23, this ensures that the anti-backflow component 2 is tightly sealed. At the same time, the guide structure 4 is located at the bottom of the drain pipe 1 and is inserted into the bottom of the anti-backflow component 2, limiting the anti-backflow component 2 from shifting or rotating due to water flow interference during movement. This further ensures the sealing performance of the anti-backflow component 2, preventing sewage from flowing back into the dishwasher and effectively preventing backflow.

[0092] In this embodiment, the weight-adding tank 20, the water-pressurizing structure 3, and the anti-backflow component 2 all employ simple mechanical designs, reducing the use of complex electrical components and sensors, thereby lowering manufacturing costs. The weight-adding tank 20 utilizes the gravity of water to spontaneously generate a reset effect, avoiding additional drive mechanisms and further reducing maintenance and production costs.

[0093] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A drainage device for a washing machine, characterized in that, Includes a drain pipe (1), and at least a portion of the drain pipe (1) extends upward along the drainage direction. An anti-backflow component (2) is provided in the upwardly extending pipe section (10), and the anti-backflow component (2) is provided with a cavity for accommodating backflow water.

2. The drainage device of the washing equipment according to claim 1, characterized in that, The anti-backflow component (2) is a columnar structure; the cavity for containing backflow water is a weight-increasing groove (20) set on the top of the columnar structure, and the opening of the weight-increasing groove (20) faces upward; Preferably, the anti-backflow component (2) moves along the direction of gravity to close the drain pipe (1).

3. The drainage device of the washing equipment according to claim 2, characterized in that, The upward-extending pipe section (10) is provided with a water-pressing structure (3) that is opposite to the weight-adding tank (20) to discharge the backflow water in the weight-adding tank (20) when the anti-backflow component (2) is opened; Preferably, the pressure structure (3) and the opening of the weight-increasing trough (20) are arranged opposite to each other, and the anti-backflow component (2) moves upward under the impact of the drainage water flow, and the weight-increasing trough (20) is at least partially fitted on the pressure structure (3).

4. The drainage device of the washing equipment according to claim 3, characterized in that, The cross-section of the weight-increasing tank (20) gradually decreases along the direction close to the bottom of the tank, and the water-pressurizing structure (3) is a column with a cross-section smaller than that of the weight-increasing tank (20); Preferably, when the anti-backflow component (2) is opened, the wall of the weight-adding tank (20) is spaced apart from the peripheral wall of the water-pressing structure (3).

5. The drainage device of the washing equipment according to any one of claims 2 to 4, characterized in that, The weight-adding tank (20) is provided with multiple tanks distributed circumferentially along the anti-backflow component (2); Preferably, the anti-backflow component (2) and the upwardly extending pipe section (10) are circumferentially limited, and / or, when the anti-backflow component (2) is closed, the lower end of the pressure structure (3) extends at least partially to the inner circumference of the groove opening of the weight-adding tank (20).

6. The drainage device of the washing equipment according to any one of claims 1 to 5, characterized in that, The upper end of the upward-extending pipe section (10) is closed, and the anti-backflow component (2) closes the lower end of the upward-extending pipe section (10) under the action of gravity. Preferably, the inner diameter of the lower end of the upwardly extending pipe segment (10) gradually decreases from top to bottom, the shape of the anti-backflow component (2) is adapted to the shape of the lower end of the upwardly extending pipe segment (10), and under the action of gravity, the anti-backflow component (2) is fitted into the lower end of the upwardly extending pipe segment (10). Preferably, the water pressure structure (3) is located on the inner side of the upper end of the upwardly extending pipe section (10).

7. The drainage device of the washing equipment according to claim 6, characterized in that, The anti-backflow component (2) includes: Limiting part (21); The sealing part (22) is connected to the limiting part (21) and has the same shape as the lower end of the upwardly extending pipe section (10); Preferably, a gap is provided between the outer periphery of the limiting part (21) and the inner side of the upwardly extending pipe section (10); Preferably, the drain pipe (1) further includes a first pipe section (11) disposed downstream of the upwardly extending pipe section (10) along the drainage direction, the first pipe section (11) being in peripheral communication with the upwardly extending pipe section (10); when the anti-backflow component (2) is in a closed state, the upper end face of the limiting part (21) is lower than the connection between the first pipe section (11) and the upwardly extending pipe section (10).

8. The drainage device of the washing equipment according to claim 7, characterized in that, The top of the limiting part (21) is provided with a rib (211) for abutting against the inner side of the upper end of the upwardly extending pipe section (10) when the anti-backflow assembly (2) is opened.

9. The drainage device of the washing equipment according to any one of claims 1 to 8, characterized in that, The drain pipe (1) is provided with a guide structure (4) for guiding the anti-backflow component (2); Preferably, the guide structure (4) includes a first guide post (41) disposed at the bottom of the anti-backflow assembly (2), and a second guide post (42) disposed in a second pipe section (12) that is connected downstream in the drainage direction of the upwardly extending pipe section (10), wherein the first guide post (41) and the second guide post (42) are sleeved together. Preferably, the first guide post (41) and the second guide post (42) are circumferentially limited together.

10. A washing device, characterized in that, A drainage device is installed with the washing equipment described in any one of claims 1 to 9.

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