CN112089377B

CN112089377B - Water cup assembly, drainage system and dish washing machine

Info

Publication number: CN112089377B
Application number: CN202011004401.6A
Authority: CN
Inventors: 鄢贵祥; 林召平; 姚智力; 黄进杰
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-11-16
Anticipated expiration: 2040-09-22
Also published as: CN112089377A

Abstract

The invention relates to the technical field of household appliances, in particular to a water cup assembly, a drainage system and a dish washing machine, wherein the water cup assembly comprises a water cup, a residual water drainage structure and a negative pressure device, and a drainage cavity is arranged in the water cup; a residual water cavity is arranged in the residual water discharging structure and comprises a residual water outlet and a residual water inlet communicated with the water discharging cavity; the negative pressure device is communicated with the residual water outlet and is suitable for applying negative pressure to the residual water cavity after the drainage cavity drains water. The water cup assembly cannot be blocked, and the residual water removing effect is good.

Description

Water cup assembly, drainage system and dish washing machine

Technical Field

The invention relates to the technical field of household appliances, in particular to a water cup assembly, a drainage system and a dish washing machine.

Background

Along with the improvement of living standard of people, dish washers appear in people's life more and more, lightened heavy human labor. Most of the dish washing machines have the same water flow system, the water cup is arranged at the bottom of the washing cavity, the lowest position of the water cup is provided with a water outlet which is connected to a drainage pump, and an impeller of the drainage pump drains water away through centrifugal action during drainage. The drain pump of current dish washer is in the final stage of drainage, and residual water volume is great in drinking cup or the dish washer basin, influences the washing and the inside drying effect of dish washer to because the waste water is remained for a long time can produce the peculiar smell, influence user experience, and influenced the complete machine performance of dish washer.

In some dish washing machines, a forced discharge port is formed in the lowest position of a water cup or a water tank of the dish washing machine and is connected to a forced discharge pump through a water pipe, and residual water in the water cup or the water tank of the dish washing machine is discharged through the forced discharge pump.

But because the strong discharge port is arranged at the lowest position of the water tank of the water cup or the dish-washing machine, and the pipe diameter of the water pipe connected with the water discharge pump is smaller, impurities in the water tank of the water cup or the dish-washing machine easily block the strong discharge port, and the discharge of residual water is influenced.

Disclosure of Invention

Therefore, the invention aims to overcome the defects that the strong drain is easy to block and the water removal effect is influenced in the prior art, and provides a water cup assembly, a drainage system and a dish washing machine which are not blocked.

The invention provides a water cup assembly, comprising:

a water cup, the interior of which is provided with a drainage cavity;

the residual water discharging structure is internally provided with a residual water cavity, and the residual water cavity comprises a residual water outlet and a residual water inlet communicated with the water discharging cavity;

and the negative pressure device is communicated with the residual water outlet and is suitable for applying negative pressure to the residual water cavity after the drainage cavity drains water.

Optionally, the residual water inlet is provided on a side wall of the residual water chamber near the bottom of the drain chamber.

Optionally, the residual water cavity is provided with a partition wall extending downwards from the top of the residual water cavity, and the partition wall divides an accommodating cavity enclosed by the water cup into a drainage cavity and a residual water cavity; a gap is arranged between the partition wall and the cup bottom of the water cup, and the gap is the residual water inlet.

Optionally, the separation wall is integrally formed with a wall of the cup.

Optionally, the residual water outlet is provided at a higher position than the residual water inlet.

Optionally, the residual water outlet is arranged on a cup wall of the residual water discharging structure opposite to the partition wall.

Optionally, the inside dog that is equipped with of drainage chamber, the dog is followed the bottom in drainage chamber upwards extends, the top of dog is higher than the bottom of surplus water import, the top of dog with the circulation mouth that supplies surplus water to pass through has between the surplus water import.

Optionally, the top of the stopper is higher than the top of the residual water inlet.

Optionally, one side of the stop block, which faces away from the residual water inlet, is provided with an inclined wall, and the inclined wall is inclined towards the residual water inlet in the process of extending from bottom to top.

The invention provides a drainage system, which comprises the water cup assembly and a drainage assembly communicated with the drainage cavity, wherein the water outlet end of the negative pressure device is communicated with the drainage assembly.

Optionally, the negative pressure assembly comprises a negative pressure pump.

Optionally, a first valve structure is arranged on a connecting passage of the negative pressure pump and the residual water outlet, and a second valve structure is arranged on a connecting passage of the negative pressure pump and the drainage assembly.

Optionally, the first valve structure is an on-off valve and the second valve structure is a one-way element.

The invention also provides a dishwasher, which comprises the drainage system.

The technical scheme of the invention has the following advantages:

1. according to the water cup assembly, after the drainage cavity drains water, the negative pressure device applies negative pressure to the residual water cavity, and residual water in the drainage cavity enters the negative pressure cavity through the residual water inlet under the action of the negative pressure and is discharged out of the water cup assembly through the residual water outlet; before and in the drainage process of the drainage cavity, the residual water outlet is not communicated with the negative pressure device, the negative pressure device does not apply negative pressure to the residual water cavity, and water cannot be drained out of the water cup assembly from the residual water outlet. Compared with the situation that the strong discharge port is formed at the lowest position of the water tank of the water cup or the dish-washing machine, impurities in the water tank of the water cup or the dish-washing machine are easy to block the strong discharge port to influence the discharge of residual water, the water-saving device is provided with the residual water cavity, and the impurities in the water tank of the water cup or the dish-washing machine are precipitated at the bottom of the drainage cavity or the bottom of the residual water cavity and cannot block the residual water inlet or the residual water outlet to influence the discharge of the residual water. The forced discharge port is connected to the forced discharge pump through a water pipe, and the water pipe is smaller in pipe diameter and is more easily blocked by impurities in a water cup or a water tank of the dish-washing machine; if the pipe diameter of the water pipe is made large, the space is occupied, the production cost is increased, and the residual water inlet can be arranged to be large due to the existence of the residual water cavity and cannot be blocked by impurities in a water cup or a water tank of a dish washing machine. Because the forced drainage port is arranged at the lowest position of the water cup or the water tank of the dish-washing machine, the sealing requirement between the forced drainage port and the water pipe is higher, the residual water inlet in the invention is not required to be sealed, and the sealing requirement of the residual water outlet is not high due to the existence of the residual water cavity.

2. The residual water inlet provided by the invention is close to the bottom of the drainage cavity, and the negative pressure device can provide proper negative pressure to suck residual water into the residual water cavity from the bottom of the drainage cavity; the farther the residual water inlet is away from the bottom of the drainage cavity, the larger the negative pressure needs to be provided by the negative pressure device, and the higher the requirement on the negative pressure device is. When the residual water inlet is arranged at the bottom of the residual water cavity, impurities are easy to accumulate at the residual water inlet under the action of gravity, and the residual water inlet is easy to block.

3. The partition wall provided by the invention divides the accommodating cavity enclosed by the water cup into the drainage cavity and the residual water cavity, the drainage cavity and the residual water cavity have a common bottom wall, and the negative pressure device can suck residual water from the drainage cavity to the residual water cavity without providing large negative pressure. A gap is arranged between the partition wall and the cup bottom of the water cup, the gap is the residual water inlet, and residual water can easily enter the residual water cavity from the drainage cavity.

4. The partition wall provided by the invention is integrally formed with the cup wall of the water cup, so that the installation step is omitted, and the production cost is reduced.

5. The residual water outlet is arranged at a position higher than the residual water inlet, so that residual water cannot flow back to the residual water cavity through the residual water outlet; on the other hand most impurity piles up in the bottom of drainage chamber under the action of gravity, and a small part of impurity piles up in the bottom in surplus water chamber under the action of gravity, can not plug up the surplus water export along with the discharge of surplus water, guarantees the normal discharge of surplus water.

6. The residual water outlet provided by the invention is arranged on the cup wall of the residual water discharge structure opposite to the partition wall, and the residual water outlet faces the outside of the water cup, so that the residual water is smoothly discharged out of the water cup. In addition, the cup wall has larger vacant space compared with the cup bottom, and the range of the residual water outlet can be set is wider, so that the interference problem with other parts such as a drainage assembly or a spray assembly is avoided.

7. The baffle block provided by the invention can baffle impurities at the bottom of the drainage cavity outside the residual water cavity under the action of gravity, so that the impurities are prevented from blocking the residual water inlet. The top of dog with have the circulation mouth that supplies the residual water to pass through between the residual water import, circulation mouth and residual water import cooperation guarantee that the residual water can normally get into the residual water chamber.

8. The top of the stop block provided by the invention is higher than the top of the residual water inlet, so that the effect of blocking impurities in the drainage cavity is better. The top of dog is higher than during the top of surplus water import, impurity will get into the surplus water chamber from water drainage chamber and need pass through "n" type route, is not higher than with the top of dog the route that impurity will pass through during the top of surplus water import compares, and the degree of difficulty that impurity got into the surplus water chamber is higher.

9. The side, back to the residual water inlet, of the stop block is provided with the inclined wall, so that the flow of residual water from the drainage cavity to the residual water cavity is guided, and the difficulty of the residual water entering the residual water cavity from the drainage cavity is reduced.

10. The drainage system provided by the invention also comprises a drainage component, wherein the water outlet end of the negative pressure device is communicated with the drainage component, and residual water discharged through the residual water cavity is discharged through the drainage component.

11. According to the drainage system provided by the invention, the first valve structure is arranged on the connecting passage of the negative pressure pump and the residual water outlet, so that the residual water is prevented from flowing reversely; and the negative pressure pump is also controlled to be communicated with the connecting passage of the residual water outlet after the drainage of the drainage cavity is finished, and the negative pressure pump is controlled to be disconnected with the connecting passage of the drainage assembly when the drainage cavity is in a drainage state and a water circulation state. And a second valve structure is arranged on a connecting passage of the negative pressure pump and the drainage assembly, so that water in the drainage assembly is prevented from entering the negative pressure pump.

12. The dish washing machine provided by the invention is provided with the drainage system, no residual water is left in a cup or a water tank of the dish washing machine after drainage, and the overall performance of the dish washing machine is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic illustration of a dishwasher of the present invention;

FIG. 2 is a schematic view of a cup assembly of the present invention;

FIG. 3 is a schematic view of a cup assembly of the present invention;

FIG. 4 is a cross-sectional view of the cup assembly of the present invention.

Description of reference numerals:

1-a water cup assembly; 11-a water cup; 111-a drainage chamber; 1111-a stop block; 11111-inclined wall; 12-residual water discharge structure; 121-residual water cavity; 1211-residual water inlet; 1212-residual water outlet; 13-a partition wall; 2-a drainage assembly; 21-draining pump; 22-a drain pipe; 23-hanging a high structure; 3-a negative pressure pump; 4-a first valve structure; 5-a second valve arrangement; 6-a washing pump; 7-a spray arm; 8-tableware shelves; 9-inner container.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 4, the present embodiment provides a cup assembly 1, including: the water cup comprises a water cup 11, a residual water discharging structure 12 and a negative pressure device, wherein a water discharging cavity 111 is arranged inside the water cup 11; a residual water cavity 121 is arranged in the residual water discharging structure 12, and the residual water cavity 121 comprises a residual water outlet 1212 and a residual water inlet 1211 communicated with the water discharging cavity 111; the negative pressure device is communicated with the residual water outlet 1212 and is suitable for applying negative pressure to the residual water cavity 121 after the drainage cavity 111 drains water.

After the drainage cavity 111 is drained, the negative pressure device applies negative pressure to the residual water cavity 121, and residual water in the drainage cavity 111 enters the negative pressure cavity through the residual water inlet 1211 under the action of the negative pressure and is discharged out of the water cup assembly 1 through the residual water outlet 1212; before and during the drainage of the drainage cavity 111, the residual water outlet 1212 is not communicated with the negative pressure device, the negative pressure device does not apply negative pressure to the residual water cavity 121, and water cannot be drained out of the water cup assembly 1 from the residual water outlet 1212. Compared with the situation that the strong discharge port is formed at the lowest position of the water cup 11 or the water tank of the dish-washing machine, impurities in the water cup 11 or the water tank of the dish-washing machine are easy to block the strong discharge port to influence the discharge of residual water, the residual water cavity 121 is arranged, the impurities in the water cup 11 or the water tank of the dish-washing machine are precipitated at the bottom of the drainage cavity 111 or the bottom of the residual water cavity 121, and cannot block the residual water inlet 1211 or the residual water outlet 1212 to influence the discharge of the residual water. The forced discharge port is connected to the forced discharge pump through a water pipe, and the water pipe is smaller in pipe diameter and is more easily blocked by impurities in the water cup 11 or the water tank of the dish-washing machine; if the pipe diameter of the water pipe is made large, the space is occupied, the production cost is increased, and the residual water inlet 1211 in the invention can be arranged to be large due to the existence of the residual water cavity 121, so that the residual water cannot be blocked by impurities in the water cup 11 or the water tank of the dish-washing machine. Because the forced drainage port is arranged at the lowest part of the water cup 11 or the water tank of the dishwasher, the sealing requirement between the forced drainage port and the water pipe is higher, the residual water inlet 1211 in the invention does not need to be sealed, and the residual water outlet 1212 has low sealing requirement due to the existence of the residual water cavity 121.

In this embodiment, the residual water inlet 1211 is disposed on a side wall of the residual water chamber 121 near the bottom of the drain chamber 111.

The residual water inlet 1211 is close to the bottom of the drainage cavity 111, and residual water can be sucked into the residual water cavity 121 from the bottom of the drainage cavity 111 by the negative pressure device providing proper negative pressure; the farther the residual water inlet 1211 is away from the bottom of the drainage cavity 111, the larger the negative pressure needs to be provided by the negative pressure device, and the higher the requirement on the negative pressure device is. When the residual water inlet 1211 is arranged at the bottom of the residual water cavity 121, impurities are easy to accumulate at the residual water inlet 1211 under the action of gravity, and the blockage of the residual water inlet 1211 is easy to cause.

Specifically, the bottom of the residual water cavity 121 and the bottom of the drainage cavity 111 may be located on the same horizontal line, so that residual water can conveniently enter the residual water cavity 121 from the drainage cavity 111; the bottom of the residual water chamber 121 may be lower than the bottom of the drain chamber 111, so that water can more easily enter the residual water chamber 121 under the action of gravity. The bottom of the residual water chamber 121 may also be slightly higher than the bottom of the drainage chamber 111, increasing the difficulty of water entering the residual water chamber 121.

In this embodiment, the residual water chamber 121 has a partition wall 13 extending downward from the top of the residual water chamber 121, and the partition wall 13 divides the accommodating chamber enclosed by the water cup 11 into a drainage chamber 111 and a residual water chamber 121; a gap is arranged between the partition wall 13 and the bottom of the water cup 11, and the gap is the residual water inlet 1211.

The containing cavity enclosed by the water cup 11 is divided into the drainage cavity 111 and the residual water cavity 121 by the partition wall 13, the drainage cavity 111 and the residual water cavity 121 have a common bottom wall, and the residual water can be sucked from the drainage cavity 111 to the residual water cavity 121 by the negative pressure device without providing a large negative pressure. A gap is formed between the partition wall 13 and the bottom of the cup 11, and the gap is the residual water inlet 1211, so that residual water can more easily enter the residual water cavity 121 from the drainage cavity 111.

As an alternative embodiment, the residual water chamber 121 may have a partition wall 13 extending upward from the bottom of the water cup 11 to the top of the residual water chamber 121, and the partition wall 13 may partition the accommodating chamber enclosed by the water cup 11 into the drainage chamber 111 and the residual water chamber 121; an opening is formed in the partition wall 13 near the bottom of the cup 11, and the opening is the residual water inlet 1211.

As an alternative embodiment, the residual water discharge structure 12 may be detachably connected to the outside of the wall of the water cup 11, the wall of the water cup 11 and the residual water discharge structure 12 cooperate to form the complete residual water cavity 121, and the residual water inlet 1211 is disposed on the wall of the water cup 11, so that the residual water cavity 121 may be cleaned periodically. Alternatively, the residual water discharge structure 12 is fixedly connected to the outside of the wall of the water cup 11, the wall of the water cup 11 and the residual water discharge structure 12 cooperate to form a complete residual water cavity 121, and the residual water inlet 1211 is disposed on the wall of the water cup 11. Alternatively, a gap may be formed between the residual water discharging structure 12 and the water cup 11, and the residual water outlet 1212 and the water discharging cavity 111 are communicated through a connecting pipe.

In this embodiment, the partition wall 13 is integrally formed with the wall of the cup 11. The installation step is omitted, and the production cost is reduced.

Alternatively, the partition wall 13 may be detachably connected to the wall of the cup 11, so that the residual water chamber 121 may be periodically cleaned. The partition wall 13 may also be fixedly connected to the wall of the cup 11.

In this embodiment, the residual water outlet 1212 is provided at a higher position than the residual water inlet 1211. On one hand, the residual water cannot flow back to the residual water cavity 121 through the residual water outlet 1212; on the other hand, most impurities are accumulated at the bottom of the drainage cavity 111 under the action of gravity, and a small amount of impurities are accumulated at the bottom of the residual water cavity 121 under the action of gravity, so that the residual water outlet 1212 cannot be blocked along with the drainage of the residual water, and the normal drainage of the residual water is ensured.

In this embodiment, the residual water outlet 1212 is disposed on a wall of the residual water discharging structure 12 opposite to the partition wall 13. The residual water outlet 1212 faces the outside of the cup 11 to smoothly discharge the residual water to the outside of the cup 11. In addition, the cup wall has a larger empty space than the cup bottom, and the residual water outlet 1212 can be provided in a wider range without interference with other components such as the drain assembly 2 or the shower assembly.

The residual water outlet 1212 is provided with a protruding portion extending to the outside of the water cup 11, the protruding portion is of a tubular structure, and the negative pressure device is connected with the protruding portion. The protrusion is integrally formed on the cup 11.

In this embodiment, a stopper 1111 is disposed inside the drain cavity 111, the stopper 1111 extends upward from the bottom of the drain cavity 111, the top of the stopper 1111 is higher than the bottom of the residual water inlet 1211, and a circulation port through which residual water passes is formed between the top of the stopper 1111 and the residual water inlet 1211.

The stopper 1111 stops the impurities at the bottom of the drain chamber 111 under the gravity outside the residual water chamber 121, thereby preventing the impurities from blocking the residual water inlet 1211. An opening for residual water to pass through is arranged between the top of the check block 1111 and the residual water inlet 1211, and the opening is matched with the residual water inlet 1211 to ensure that the residual water can normally enter the residual water cavity 121. When the bottom in residual water chamber 121 is less than when the bottom in drainage chamber 111, residual water chamber 121 with because dog 1111 forms the siphon passageway between the drainage chamber 111, can be with all residual water in the drainage chamber 111 arrange to the residual water chamber 121 in.

In this embodiment, the top of the stopper 1111 is higher than the top of the residual water inlet 1211. The top of the baffle 1111 is higher than the top of the residual water inlet 1211, so that the effect of blocking impurities in the drainage cavity 111 is better. When the top of the stopper 1111 is higher than the top of the residual water inlet 1211, the impurities need to pass through the "n" type path to enter the residual water chamber 121 from the drain chamber 111, and the impurities have a higher difficulty in entering the residual water chamber 121 than the path through which the impurities pass when the top of the stopper 1111 is not higher than the top of the residual water inlet 1211. "n" is a lower case English letter.

The side of the stopper 1111 facing away from the residual water inlet 1211 in this embodiment has an inclined wall 11111, and the inclined wall 11111 is inclined toward the residual water inlet 1211 while extending from bottom to top. The inclined wall 11111 guides the flow of the residual water from the drain chamber 111 to the residual water chamber 121, thereby reducing the difficulty of the residual water entering the residual water chamber 121 from the drain chamber 111.

This embodiment still provides a drainage system, including above-mentioned drinking cup subassembly 1, still include with drainage module 2 of drainage chamber 111 intercommunication, negative pressure device's play water end with drainage module 2's play water end intercommunication will pass through drainage module 2 through the exhaust surplus water of surplus water chamber 121 drainage. The drain assembly 2 includes a drain pump 21, most commonly a centrifugal pump, disposed within the drain pump 21 housing, resulting in residual water remaining within the water cup 11 and the drain pump 21 housing. The drainage cavity 111 includes a drainage port, a water inlet end of the drainage pump 21 is communicated with the drainage port, a water outlet end of the drainage pump 21 is communicated with a drainage pipe 22, a hanging structure 23 is arranged on the drainage pipe 22, and a water outlet end of the negative pressure device is communicated with the drainage pipe 22 behind the hanging structure 23 to prevent residual water from entering the drainage pump 21.

The negative pressure assembly in this embodiment comprises a negative pressure pump 3. The negative pressure pump 3 may be a positive displacement pump. In particular, a gear pump, a plunger pump, a diaphragm pump or a peristaltic pump.

In this embodiment, a first valve structure 4 is disposed on a connection path between the negative pressure pump 3 and the residual water outlet 1212, so as to prevent the residual water from flowing backwards; and controlling the negative pressure pump 3 to be communicated with the connection passage of the residual water outlet 1212 after the drainage of the drainage cavity 111 is finished, and controlling the negative pressure pump 3 to be disconnected from the connection passage of the drainage assembly 2 when the drainage cavity 111 is in a drainage state and a washing state of water circulation. And a second valve structure 5 is arranged on a connecting passage of the negative pressure pump 3 and the drainage assembly 2, so that water in the drainage assembly 2 is prevented from entering the negative pressure pump 3.

In this embodiment, the first valve structure 4 is an on-off valve, and the second valve structure 5 is a one-way element.

As an alternative embodiment, the second valve arrangement 5 may also be an on-off valve.

The embodiment also discloses a dishwasher which comprises the drainage system. The tableware washing machine further comprises an inner container 9, a tableware shelf 8, a spraying arm 7 and a washing pump 6 are arranged in the inner container 9, one end of the washing pump 6 is communicated to a water cup 11, and the other end of the washing pump 6 is communicated to the spraying arm 7. During the washing process, the washing pump 6 delivers water in the cup 11 to the spray arm 7 to spray the water to the dishes on the dish rack 8.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A cup assembly, comprising:

a water cup (11) with a drainage cavity (111) inside;

the residual water discharging structure (12) is internally provided with a residual water cavity (121), and the residual water cavity (121) comprises a residual water outlet (1212) and a residual water inlet (1211) communicated with the water discharging cavity (111);

negative pressure means communicating with said residual water outlet (1212) and adapted to apply a negative pressure to said residual water chamber (121) after drainage of said drainage chamber (111);

the residual water inlet (1211) is arranged on the side wall of the residual water cavity (121) close to the bottom of the drainage cavity (111);

the residual water cavity (121) is provided with a partition wall (13) extending downwards from the top of the residual water cavity (121), and the partition wall (13) divides an accommodating cavity surrounded by the water cup (11) into a drainage cavity (111) and a residual water cavity (121); a gap is arranged between the partition wall (13) and the bottom of the water cup (11), and the gap is the residual water inlet (1211).

2. The cup assembly according to claim 1, characterized in that the partition wall (13) is integrally formed with the wall of the cup (11).

3. The cup assembly according to claim 1 or 2, characterized in that the residual water outlet (1212) is provided at a higher position than the residual water inlet (1211).

4. Cup assembly according to claim 1 or 2, wherein the residual water outlet (1212) is provided in a wall of the residual water draining structure (12) opposite the separating wall (13).

5. A cup assembly according to claim 1 or 2, characterized in that a stopper (1111) is provided inside the drain chamber (111), the stopper (1111) extends upward from the bottom of the drain chamber (111), the top of the stopper (1111) is higher than the bottom of the residual water inlet (1211), and a flow port for the residual water is provided between the top of the stopper (1111) and the residual water inlet (1211).

6. The cup assembly of claim 5, wherein a top of the stopper (1111) is higher than a top of the residual water inlet (1211).

7. A cup assembly according to claim 5, characterized in that the side of the stop (1111) facing away from the residual water inlet (1211) has an inclined wall (11111), which inclined wall (11111) during its extension from bottom to top is inclined towards the residual water inlet (1211).

8. A drainage system, comprising a cup assembly (1) according to any one of claims 1 to 7, and a drainage assembly (2) in communication with the drainage chamber (111), the outlet end of the negative pressure device being in communication with the outlet end of the drainage assembly (2).

9. A drainage system according to claim 8, wherein the negative pressure assembly comprises a negative pressure pump (3).

10. A drainage system according to claim 9, wherein a first valve structure (4) is provided in the connection path of the negative pressure pump (3) to the residual water outlet (1212), and a second valve structure (5) is provided in the connection path of the negative pressure pump (3) to the drainage assembly (2).

11. A drainage system according to claim 10, wherein the first valve structure (4) is an on-off valve and the second valve structure (5) is a one-way element.

12. A dishwasher, comprising a drain system according to any one of claims 8 to 11.