Drainage device and dish washing machine

Abstract

The utility model relates to the field of household appliances, in particular to a drainage device and a dishwasher, in the drainage device, a sewage collecting part is provided with a first inner cavity, a second inner cavity and a communicating hole, the first inner cavity is used for connecting a water cup, and a sealing part moves in the second inner cavity in the first direction; the driving mechanism comprises a moving part, a cam and a rotating motor, one end of the moving part extends into the second inner cavity in the first direction and is connected with the sealing part, a limiting hole is formed in the other end of the moving part, and the rotating motor drives the moving part to rotate in the first direction. The cam is provided with a limiting convex part, the limiting convex part is slidably arranged in the limiting hole in a penetrating mode in the second direction, the second direction is perpendicular to the first direction, the output end of the rotating motor is connected with the cam, and before the drainage water pump stops working, the driving mechanism drives the sealing part to move in the first direction so that the first inner cavity and the second inner cavity can be blocked; the sewage cannot flow back into the first inner cavity.

Description

Technical Field

[0001] The utility model relates to the field of household appliances, in particular to a drainage device and a dishwasher. Background Art

[0002] A dishwasher is a device that sprays cold or hot water onto dishes to remove dirt adhering to the dishes and clean the dishes. It has a heating and disinfection function that can kill pathogens such as Escherichia coli, Staphylococcus aureus, and hepatitis B virus.

[0003] The water cup of the dishwasher is connected to the water inlet of the drain pump. The sewage in the dishwasher flows through the water cup under the action of the drain pump and is discharged from the drain outlet of the drain pump. In the prior art, the drain pump of the dishwasher usually uses the centrifugal force generated by the impeller on the water under a vacuum state to discharge the sewage. When the drain pump stops working, a small amount of sewage will inevitably flow back into the water cup, causing bacteria to grow in the enclosed space inside the dishwasher and producing an unpleasant odor. Utility Model Content

[0004] One purpose of the utility model is to provide a drainage device and a dishwasher, which can completely drain the sewage from the water cup of the dishwasher and prevent the sewage from flowing back into the water cup.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A drainage device, comprising:

[0007] A sewage collection part, wherein the sewage collection part is provided with a first inner cavity, a second inner cavity and a connecting hole, wherein the first inner cavity is used to connect a water cup;

[0008] a sealing portion, the sealing portion being movably disposed in the second inner cavity along a first direction so that the first inner cavity can be selectively connected to or blocked from the second inner cavity through the communicating hole;

[0009] A driving mechanism, comprising a moving part, a cam and a rotating motor, wherein one end of the moving part extends into the second inner cavity along the first direction and is connected to the sealing part, the cam is provided with a limiting convex part eccentrically arranged with respect to the rotating axis of the cam, the other end of the moving part is provided with a limiting hole, the limiting convex part is slidably penetrated in the limiting hole along a second direction, the second direction is perpendicular to the first direction, the output end of the rotating motor is connected to the cam, and the rotating motor can drive the cam to rotate;

[0010] A discharge water pump, wherein a water inlet of the discharge water pump is connected to the second inner cavity.

[0011] Further, the moving part includes a pull rod and a sliding cover, the pull rod is connected to the sealing part, the sliding cover is provided with the limiting hole, one of the sliding cover and the pull rod is provided with a moving hole, and the other is provided with a moving convex part, the moving convex part and the moving hole are slidably matched along a first direction, so that the pull rod drives the sealing part to and from the cut-off position and the connecting position;

[0012] When the sealing part is in the cut-off position, the sealing part blocks the first inner cavity and the second inner cavity, and the two inner walls of the movable protrusion and the movable hole in the first direction are spaced apart along the first direction;

[0013] When the sealing portion is in the communication position, the sealing portion connects the first inner cavity and the second inner cavity, and the movable protrusion abuts against an inner wall of the movable hole in the first direction;

[0014] The driving mechanism further comprises:

[0015] An elastic member is used to make the sealing portion have a tendency to move from the connecting position to the disconnecting position along a first direction, and can also keep the sealing portion at the disconnecting position.

[0016] Further, the second inner cavity has a limiting inner wall facing the cut-off position along the first direction, and the elastic member is arranged between the sealing portion and the limiting inner wall along the first direction.

[0017] Furthermore, the driving mechanism further comprises:

[0018] A sleeve, wherein the sleeve is telescopically sleeved outside the pull rod, one end of the sleeve is connected to the sewage collecting part, and the other end is connected to the sealing part; the sleeve divides the second inner cavity into an installation cavity and a water flow cavity which are not connected to each other, the elastic member is located in the installation cavity, and the sealing part can make the first inner cavity selectively connected to or blocked with the water flow cavity through the connecting hole.

[0019] Further, the sealing portion has a sealing surface, the sealing surface is convexly provided with a sealing convex portion, the sealing surface and the sealing convex portion are made of elastic material, a sealing mating surface is formed at the connecting position of the connecting hole and the second inner cavity, the sealing mating surface is convexly provided with a sealing mating convex portion, and when the sealing portion is located at the truncation position, the sealing convex portion abuts against the sealing mating surface, and the sealing mating convex portion abuts against the sealing surface.

[0020] Furthermore, it also includes:

[0021] The discharge part is provided with a discharge cavity, the sewage collecting part is provided with a water flow hole, the discharge cavity is connected with the second inner cavity through the water flow hole, the discharge part is provided with a drainage hole connected with the discharge cavity, the discharge water pump is arranged inside the discharge cavity, and the water outlet of the discharge water pump is connected with the drainage hole.

[0022] Furthermore, the drainage hole is arranged at the top of the discharge portion along the vertical direction.

[0023] Furthermore, the highest point of the water flow hole in the vertical direction is not higher than the lowest point of the connecting hole in the vertical direction.

[0024] Furthermore, the bottom wall of the first inner cavity is an inclined surface, and along the direction from top to bottom, the inclined surface is inclined from the water inlet of the first inner cavity to the side where the communicating hole is located.

[0025] Another object of the utility model is to provide a dishwasher, which can completely discharge the sewage in the water cup of the dishwasher and prevent the sewage from flowing back into the water cup.

[0026] To achieve this purpose, the utility model adopts the following technical solutions:

[0027] A dishwasher comprises a water cup and the drainage device, wherein the water cup is connected to the first inner cavity.

[0028] Beneficial effects:

[0029] The utility model provides a drainage device and a dishwasher. In the drainage device, a sewage collecting part is provided with a first inner cavity, a second inner cavity and a communicating hole. The first inner cavity is used to connect a water cup. A sealing part is movably arranged in the second inner cavity along a first direction, so that the first inner cavity can be selectively communicated with or blocked by the second inner cavity through the communicating hole. The water inlet of the discharge water pump is communicated with the second inner cavity. The driving mechanism comprises a moving part, a cam and a rotating motor. One end of the moving part extends into the second inner cavity along the first direction and is connected with the sealing part. A limiting hole is provided at the other end of the moving part. A limiting convex part is provided on the cam. The limiting convex part is slidably penetrated in the limiting hole along the second direction. The second direction is perpendicular to the first direction. The output end of the rotating motor is connected with the cam. The rotating motor can drive the cam to rotate. The sealing part is driven to move along the first direction in the second inner cavity through the driving mechanism. Before the discharge water pump stops working, the rotating motor is controlled to drive the cam to rotate, so as to drive the sealing part to move along the first direction, so as to block the communication between the first inner cavity and the second inner cavity, so that the backflowing sewage cannot flow into the first inner cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the top view of the structure of the drainage device provided by the embodiment of the utility model;

[0031] Figure 2 It is a structural schematic diagram of the drainage part of the drainage device provided by the embodiment of the utility model;

[0032] Figure 3 It is a cross-sectional view of the sewage collection part of the drainage device provided by the embodiment of the utility model;

[0033] Figure 4 is a cross-sectional view of a drainage device provided by an embodiment of the utility model;

[0034] Figure 5 This utility model Figure 4 A partial enlarged view of the middle A;

[0035] Figure 6 It is a schematic diagram of the structure of the first inner cavity of the drainage device provided in an embodiment of the utility model.

[0036] Wherein: 1. sewage collection part; 11. first inner cavity; 111. sealing matching convex part; 12. second inner cavity; 121. water flow cavity; 122. installation cavity; 13. connecting hole; 14. water flow hole; 15. installation part; 151. first limit piece; 152. second limit piece; 153. slide rail; 2. sealing part; 21. sealing convex part; 3. discharge part; 31. discharge cavity; 32. drainage hole; 4. discharge water pump; 5. driving mechanism; 51. pull rod; 511. moving convex part; 52. sliding cover; 521. limiting hole; 522. moving hole; 53. cam; 531. limiting convex part; 54. rotating motor; 55. elastic part; 56. sleeve; 100. water cup. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0039] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] The present embodiment provides a drainage device and a dishwasher. The dishwasher includes a water cup 100 and the above-mentioned drainage device. The water cup 100 is connected to the drainage device. The sewage in the dishwasher flows through the water cup 100 and is discharged from the drainage device, which can prevent the sewage from flowing back into the water cup 100, thereby achieving the effect of cleanly discharging the sewage in the water cup 100 of the dishwasher.

[0042] Please refer to Figure 1-6 The drainage device provided in this embodiment includes a sewage collecting part 1, a sealing part 2, a driving mechanism 5 and a discharge water pump 4. The sewage collecting part 1 is provided with a first inner cavity 11, a second inner cavity 12 and a connecting hole 13. The first inner cavity 11 is used to connect the water cup 100. The sealing part 2 is movably arranged in the second inner cavity 12 along the first direction, so that the first inner cavity 11 can be selectively connected or blocked with the second inner cavity 12 through the connecting hole 13. The driving mechanism 5 includes a moving part, a cam 53 and a rotating motor 54. One end of the moving part extends into the second inner cavity 12 along the first direction and is connected to the sealing part 2. A limiting convex part 531 eccentrically arranged with respect to the rotation axis of the cam 53 is arranged on the cam 53. A limiting hole 521 is provided at the other end of the moving part. The limiting convex part 531 is slidably penetrated in the limiting hole 521 along the second direction. The second direction is perpendicular to the first direction. The output end of the rotating motor 54 is connected to the cam 53. The rotating motor 54 can drive the cam 53 to rotate. The water inlet of the discharge water pump 4 is connected with the second inner cavity 12.

[0043] The rotating motor 54 drives the cam 53 to rotate, and the limiting protrusion 531 on the cam 53 is slidably arranged in the limiting hole 521 along the second direction. When the cam 53 rotates, the limiting protrusion 531 moves along the circumferential direction of the cam 53. The limiting protrusion 531 slides in the limiting hole 521 along the second direction to balance the displacement of the moving part in the second direction, so that the moving part only makes a linear reciprocating motion along the first direction, thereby driving the sealing part 2 to be movably arranged in the second inner cavity 12 along the first direction through the moving part, so that the first inner cavity 11 can be selectively connected or blocked with the second inner cavity 12 through the connecting hole 13. Before the discharge water pump 4 stops working, the cam 53 is driven to rotate by controlling the rotary motor 54 to drive the sealing part 2 to move along the second direction to block the connection between the first inner cavity 11 and the second inner cavity 12, so that the returned sewage cannot flow into the first inner cavity 11, thereby preventing the sewage from flowing back into the water cup 100 connected to the first inner cavity 11, so as to achieve the effect of cleanly discharging the sewage in the dishwasher water cup 100, and avoid the generation of odor and breeding of bacteria due to the residual sewage in the cup body.

[0044] For details, please refer to Figure 1 and Figure 2 The drainage device provided in this embodiment also includes a discharge part 3, which is formed with a discharge cavity 31, a water flow hole 14 is provided on the sewage collection part 1, and the discharge cavity 31 is connected with the second inner cavity 12 through the water flow hole 14. A drainage hole 32 connected with the discharge cavity 31 is provided on the discharge part 3, and a discharge water pump 4 is arranged inside the discharge cavity 31, and the water outlet of the discharge water pump 4 is connected with the drainage hole 32. After the sewage enters the discharge cavity 31 from the second inner cavity 12, it is discharged through the drainage hole 32 under the action of the discharge water pump 4. When the discharge water pump 4 stops working, by adding the discharge cavity 31, the backflowing sewage enters the discharge cavity 31 first, reducing the flow rate of the sewage backflowing to the second inner cavity 12, and further preventing the backflowing sewage from entering the water cup 100.

[0045] Exemplarily, the discharge water pump 4 in this embodiment is a centrifugal pump. When the sewage fills the discharge cavity 31 , the sewage is discharged from the drainage hole 32 under the action of the centrifugal force of the discharge water pump 4 .

[0046] For further information, please refer to Figure 2 The drainage hole 32 is arranged at the top of the discharge part 3 in the vertical direction. According to the different densities of water and air, the sewage entering the discharge chamber 31 from the water flow hole 14 continuously squeezes out the air with low density from the drainage hole 32 at the top until the sewage fills the discharge chamber 31, so that the impeller of the discharge water pump 4 generates a centrifugal force sufficient to discharge the sewage. By arranging the drainage hole 32 at the top of the discharge chamber 31, the exhaust component separately arranged at the discharge part 3 is omitted, the structure of the discharge part 3 is simplified, the manufacturing cost is saved, and the economic benefits are good.

[0047] For further information, please refer to Figure 3In order to make it difficult for the backflowing sewage to flow back into the first inner cavity 11, the highest point of the water flow hole 14 in the vertical direction is not higher than the lowest point of the connecting hole 13 in the vertical direction. For the convenience of description, the highest point of the water flow hole 14 in the vertical direction is recorded as point b, and the lowest point of the connecting hole 13 in the vertical direction is recorded as point c. By making point b not higher than point c in the vertical direction, there is a height difference between the connecting hole 13 and the water flow hole 14 in the vertical direction, making it difficult for the sewage backflowing into the second inner cavity 12 to flow back into the first inner cavity 11 through the connecting hole 13. In addition, due to the height difference, when the sewage enters the second inner cavity 12, the sewage water level is higher than point b, thereby preventing air from entering the discharge cavity 31 together with the sewage, resulting in the centrifugal force generated by the impeller of the discharge water pump 4 being insufficient to discharge the sewage.

[0048] Specifically, according to the change in the flow rate of sewage, the sewage water level in the second inner cavity 12 will gradually decrease under the action of the discharge water pump 4. When the sewage water level is lower than point b, the sewage and air enter the discharge cavity 31 from the water flow hole 14, so that the centrifugal force generated by the impeller of the discharge water pump 4 is gradually reduced compared with the centrifugal force generated on the water under vacuum conditions. At this time, the driving mechanism 5 drives the sealing part 2 to slowly move along the first direction to the cut-off position that cuts off the first inner cavity 11 and the second inner cavity 12. After the sealing part 2 blocks the connection between the first inner cavity 11 and the second inner cavity 12, the discharge water pump 4 stops working, thereby preventing sewage from flowing back into the water cup 100, thereby achieving the effect of clean discharge of sewage in the water cup 100.

[0049] For further information, please refer to Figure 4 The sewage collection part 1 also includes a mounting part 15, a rotating motor 54, a cam 53, and one end of the moving part are arranged in the inner cavity of the mounting part 15, and the other end of the moving part passes through the mounting part 15 along the first direction near the cut-off position to enter the second inner cavity 12, and is arranged in the second inner cavity 12.

[0050] For further information, please refer to Figure 4 The moving part includes a pull rod 51 and a sliding cover 52. The pull rod 51 is connected to the sealing part 2. A limit hole 521 is provided on the sliding cover 52. A moving hole 522 is provided on the sliding cover 52. A moving protrusion 511 is provided on the pull rod 51. The moving protrusion 511 and the moving hole 522 slide together along the first direction to make the end of the pull rod 51 connected to the sealing part 2 move back and forth between the cut-off position and the connecting position. By setting the moving protrusion 511 and the moving hole 522, there is a movement gap between the pull rod 51 and the sliding cover 52. The driving mechanism 5 also includes an elastic member 55. The elastic member 55 is used to make the sealing part 2 have a tendency to move from the connecting position to the cut-off position along the first direction, and can also keep the sealing part 2 at the cut-off position. Exemplarily, the elastic member 55 is arranged along the first direction between the sealing part 2 and the inner wall of the second inner cavity 12 along the first direction toward the cut-off position. In this embodiment, the elastic member 55 is a spring, and the spring is sleeved outside the pull rod 51.

[0051] When the sealing part 2 is in the connecting position, the movable protrusion 511 abuts against one end of the movable hole 522 close to the cut-off position, and the sealing part 2 is pulled by the pull rod 51 to compress the elastic member 55, so that the first inner cavity 11 and the second inner cavity 12 are connected.

[0052] The cam 53 is driven by the rotating motor 54 to rotate and drive the sliding cover 52 to move along the first direction to approach the cut-off position, thereby releasing the abutment state between the movable protrusion 511 and the movable hole 522 at one end close to the cut-off position. Under the action of the elastic restoring force of the elastic member 55, the elastic member 55 pushes the sealing portion 2 to drive the pull rod 51 to move along the first direction from the connecting position to the cut-off position. During the movement of the sealing portion 2, the rotation speed of the rotating motor 54 is controlled to make the sliding cover 52 move along the first direction to approach the cut-off position. The moving protrusion 511 and the moving hole 522 are always spaced apart along the first direction on the two opposite inner walls in the first direction. During the movement of the sealing portion 2 to approach the cut-off position along the first direction, that is, the moving directions of the sliding cover 52 and the pull rod 51 are the same and the moving speed of the sliding cover 52 is greater than the moving speed of the pull rod 51, the moving protrusion 511 slides in the moving hole 522 and never contacts the two opposite inner walls of the moving hole 522 in the first direction, thereby avoiding the moving protrusion 511 from impacting the two opposite inner walls of the moving hole 522 in the first direction during the movement, thereby preventing the moving protrusion 511 from being damaged due to the impact of the moving protrusion 511 on the two opposite inner walls in the first direction of the moving hole 522.

[0053] When the elastic member 55 returns to the state before compression, the sealing part 2 is in the cut-off position and stops moving. The elastic member 55 keeps the sealing part 2 in the cut-off position so that the first inner cavity 11 and the second inner cavity 12 are blocked. At this time, the movable protrusion 511 and the movable hole 522 are still spaced apart on the two opposite inner walls in the first direction, thereby preventing the movable protrusion 511 from impacting the end of the movable hole 522 close to the cut-off position and causing damage to the movable protrusion 511.

[0054] The cam 53 is driven by the rotating motor 54 to rotate and drive the sliding cover 52 to move away from the cut-off position along the first direction, so that the movable protrusion 511 abuts against the end of the movable hole 522 close to the cut-off position, thereby pulling the pull rod 51, and the sealing part 2 is driven by the pull rod 51 to move from the cut-off position to the connecting position until it stops at the connecting position, and the sealing part 2 is maintained at the connecting position.

[0055] In other embodiments, the moving protrusion 511 may be disposed on the sliding cover 52 , and the moving hole 522 may be disposed on the pull rod 51 .

[0056] For further information, please refer to Figure 4In order to prevent the sewage in the second inner cavity 12 from directly contacting the elastic member 55 and contaminating the elastic member 55, the driving mechanism 5 also includes a sleeve 56, which is telescopically sleeved on the pull rod 51, one end of the sleeve 56 is connected to the inner wall of the second inner cavity 12 along the first direction toward the cut-off position, and the other end is connected to the sealing part 2; the sealing part 2 divides the second inner cavity 12 into an installation cavity 122 and a water flow cavity 121, and the elastic member 55 is located in the installation cavity 122. Sewage generally exists in the water flow chamber 121 of the second inner cavity 12, and the elastic member 55 and the pull rod 51 are located in the installation chamber 122. The installation chamber 122 and the water flow chamber 121 are not connected, thereby avoiding direct contact between the elastic member 55, the pull rod 51 and other structures with sewage, and avoiding contamination by sewage. In addition, by connecting one end of the sleeve 56 to the inner wall of the second inner cavity 12 along the first direction toward the cut-off position, and the other end to the sealing part 2, it is avoided that sewage flows into the driving mechanism 5 from the matching gap between the pull rod 51 and the second inner cavity 12, polluting the driving mechanism 5 and affecting the normal operation of the driving mechanism 5.

[0057] For further information, please refer to Figure 4 , since the process of the cam 53 rotating to drive the sliding cover 52 to move along the first direction will generate a certain amplitude of vibration in the second direction, the sealing effect of the sealing part 2 is not good, and the connection between the first inner cavity 11 and the second inner cavity 12 cannot be blocked. Therefore, the mounting part 15 is provided with a slide rail 153 extending along the first direction, and the sliding cover 52 is provided with a slide groove. The slide rail 153 and the slide groove are slidably matched along the first direction, so that the sliding cover 52 can only move linearly along the first direction, thereby avoiding the sliding cover 52 from vibrating along the second direction, and then making the movement of the sealing part 2 along the first direction more stable. Exemplarily, the slide rail 153 can be arranged at intervals on both sides of the cam 53 along the second direction. In other embodiments, the slide rail 153 can be provided on the sliding cover 52, and the slide groove can be provided on the mounting part 15.

[0058] For further information, please refer to Figure 4 The mounting portion 15 includes a first stopper 151 and a second stopper 152. The first stopper 151 is used to limit the moving distance of the slide cover 52 along the first direction close to the cut-off position, and the second stopper 152 is used to limit the moving distance of the slide cover 52 along the first direction away from the cut-off position. When the movement of the sealing portion 2 along the first direction close to the cut-off position stops, the maximum displacement of the slide cover 52 along the first direction close to the cut-off position is limited by the first stopper 151, thereby preventing the end of the moving hole 522 away from the cut-off position from hitting the moving protrusion 511 after the moving protrusion 511 stops moving, causing structural damage. The second stopper 152 limits the maximum displacement of the slide cover 52 along the first direction away from the cut-off position, thereby preventing the elastic restoring force on the moving protrusion 511 from being too large, resulting in excessive force between the moving protrusion 511 and the end of the moving hole 522 close to the cut-off position, causing structural damage.

[0059] For example, please refer to Figure 4 The first limit member 151 and the second limit member 152 are symmetrically arranged along the first symmetry plane, and the first symmetry plane is perpendicular to the axial direction of the pull rod 51. The first limit member 151 is arranged on the side of the first symmetry plane close to the truncation position, and the first limit member 151 is tilted. From one end of the first limit member 151 close to the first symmetry plane to the other end, the first limit member 151 gradually moves away from the central axis of the pull rod 51. The second limit member 152 is arranged on the side of the first symmetry plane away from the truncation position. The second limit member 152 is tilted. From one end of the second limit member 152 close to the first symmetry plane to the other end, the second limit member 152 gradually moves away from the central axis of the pull rod 51. The sliding cover 52 is arranged between the first limit member 151 and the second limit member 152 along the first direction.

[0060] For further information, please refer to Figure 5 In order to make the sealing part 2 seal the cut-off position of the first inner cavity 11 and the second inner cavity 12 more tightly, the sealing part 2 has a sealing surface, and a sealing protrusion 21 is convexly provided on the sealing surface. The sealing surface and the sealing protrusion 21 are made of elastic material. A sealing mating surface is formed at the connecting position of the connecting hole 13 and the second inner cavity 12, and a sealing mating protrusion 111 is convexly provided on the sealing mating surface. When the sealing part 2 is at the cut-off position, the sealing protrusion 21 abuts against the sealing mating surface, and the sealing mating protrusion 111 abuts against the sealing surface.

[0061] Since the sealing part 2 is made of elastic material and the sealing mating protrusion 111 is made of hard material, when the sealing surface abuts against the sealing mating surface, the sealing mating protrusion 111 squeezes the sealing surface so that the sealing surface generates elastic deformation to generate a sealing groove, and the sealing mating protrusion 111 is inserted into the sealing groove. In addition, the sealing protrusion 21 is made of elastic material, and when the sealing protrusion 21 abuts against the sealing mating surface, the sealing protrusion 21 generates elastic deformation, thereby tightly adhering to the sealing mating surface, achieving a double sealing effect, making the sealing part 2 more tightly sealed at the cut-off position of the first inner cavity 11 and the second inner cavity 12, further preventing sewage from flowing back into the first inner cavity 11, so that no sewage flows back into the water cup 100, thereby achieving the effect of cleanly discharging sewage in the water cup 100.

[0062] Exemplarily, a plurality of sealing protrusions 21 and sealing matching protrusions 111 are provided along the circumference of the communicating hole 13 , and the plurality of sealing protrusions 21 and the plurality of sealing matching protrusions 111 correspond one to one.

[0063] In other embodiments, the sealing portion 2 can be made of a hard material, and the sleeve 56 can be made of an elastic material. One end of the sleeve 56 is connected to the inner wall of the second inner cavity 12 along the first direction toward the cut-off position, and the other end of the sleeve 56 is closed to sleeve the sealing portion 2 into the installation cavity 122. The closed end of the sleeve 56 forms a sealing surface, and a sealing protrusion 21 is convexly formed on the sealing surface.

[0064] For further information, please refer to Figure 6 In order to allow the sewage in the cup 100 to quickly enter the second inner cavity 12, the bottom wall of the first inner cavity 11 is an inclined surface. From top to bottom, the inclined surface is inclined from the water inlet of the first inner cavity 11 to the side where the connecting hole 13 is located, and the sewage is guided by the inclined surface. In this embodiment, the first inner cavity 11 is connected to the lower end water outlet of the cup 100 in the vertical direction. The sewage flowing out of the dishwasher cup 100 flows along the inclined surface of the first inner cavity 11 to the connecting hole 13 and enters the second inner cavity 12. By setting the inclined surface, the lower end water outlet of the cup 100 is higher than the connecting hole 13 in the vertical direction, so that the sewage can enter the second inner cavity 12 more quickly under the action of gravity. In addition, since the highest point of the water flow hole 14 in the vertical direction is not higher than the lowest point of the connecting hole 13 in the vertical direction, a flow structure that descends in sequence in the vertical direction is formed inside the drainage device, so that the sewage can naturally flow into the drainage cavity under the action of gravity.

[0065] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A drainage device, characterized in that: include: A sewage collection portion (1), the sewage collection portion (1) being provided with a first inner cavity (11), a second inner cavity (12) and a connecting hole (13), the first inner cavity (11) being used for connecting a water cup (100); a sealing portion (2), the sealing portion (2) being movably disposed in the second inner cavity (12) along a first direction, so that the first inner cavity (11) can be selectively connected to or blocked from the second inner cavity (12) through the connecting hole (13); The driving mechanism (5) comprises a moving part, a cam (53) and a rotating motor (54), wherein one end of the moving part extends into the second inner cavity (12) along the first direction and is connected to the sealing part (2); the cam (53) is provided with a limiting convex part (531) eccentrically arranged with respect to the rotation axis of the cam (53); the other end of the moving part is provided with a limiting hole (521), and the limiting convex part (531) is slidably penetrated in the limiting hole (521) along a second direction, and the second direction is perpendicular to the first direction; the output end of the rotating motor (54) is connected to the cam (53), and the rotating motor (54) is capable of driving the cam (53) to rotate; A discharge water pump (4), wherein a water inlet of the discharge water pump (4) is in communication with the second inner cavity (12).

2. The drainage device according to claim 1, characterized in that: The movable portion comprises a pull rod (51) and a sliding cover (52); the pull rod (51) is connected to the sealing portion (2); the sliding cover (52) is provided with the limiting hole (521); one of the sliding cover (52) and the pull rod (51) is provided with a movable hole (522); the other is provided with a movable protrusion (511); the movable protrusion (511) and the movable hole (522) are slidably matched along a first direction, so that the pull rod (51) drives the sealing portion (2) to move back and forth between a cut-off position and a connecting position; When the sealing portion (2) is in the cut-off position, the sealing portion (2) blocks the first inner cavity (11) and the second inner cavity (12), and the movable protrusion (511) and the movable hole (522) are arranged at intervals along the first direction on two inner walls opposite to each other in the first direction; When the sealing portion (2) is in the communication position, the sealing portion (2) connects the first inner cavity (11) and the second inner cavity (12), and the movable protrusion (511) and the movable hole (522) are in contact with an inner wall in the first direction; The driving mechanism (5) further comprises: An elastic member (55) is used to allow the sealing portion (2) to have a tendency to move from the connecting position to the disconnecting position along a first direction, and can also allow the sealing portion (2) to remain in the disconnecting position.

3. The drainage device according to claim 2, characterized in that: The second inner cavity (12) has a limiting inner wall extending along the first direction toward the cut-off position, and the elastic member (55) is arranged between the sealing portion (2) and the limiting inner wall along the first direction.

4. The drainage device according to claim 3, characterized in that: The driving mechanism (5) further comprises: A sleeve (56), wherein the sleeve (56) is telescopically sleeved outside the pull rod (51), one end of the sleeve (56) is connected to the sewage collecting portion (1), and the other end is connected to the sealing portion (2); the sleeve (56) divides the second inner cavity (12) into a mounting cavity (122) and a water flow cavity (121) which are not connected to each other, the elastic member (55) is located in the mounting cavity (122), and the sealing portion (2) can make the first inner cavity (11) selectively connected to or blocked from the water flow cavity (121) through the connecting hole (13).

5. The drainage device according to claim 2, characterized in that: The sealing portion (2) has a sealing surface, on which a sealing protrusion (21) is convexly provided, and the sealing surface and the sealing protrusion (21) are made of elastic material; a sealing mating surface is formed at the connecting position of the connecting hole (13) and the second inner cavity (12), on which a sealing mating protrusion (111) is convexly provided, and when the sealing portion (2) is located at the cut-off position, the sealing protrusion (21) abuts against the sealing mating surface, and the sealing mating protrusion (111) abuts against the sealing surface.

6. The drainage device according to claim 1, characterized in that: Also includes: A discharge portion (3), wherein the discharge portion (3) is provided with a discharge cavity (31), the sewage collecting portion (1) is provided with a water flow hole (14), the discharge cavity (31) is connected to the second inner cavity (12) through the water flow hole (14), the discharge portion (3) is provided with a drainage hole (32) connected to the discharge cavity (31), the discharge water pump (4) is arranged inside the discharge cavity (31), and the water outlet of the discharge water pump (4) is connected to the drainage hole (32).

7. The drainage device according to claim 6, characterized in that: The drainage hole (32) is arranged at the top of the discharge portion (3) along the vertical direction.

8. The drainage device according to claim 7, characterized in that: The highest point of the water flow hole (14) in the vertical direction is not higher than the lowest point of the connecting hole (13) in the vertical direction.

9. The drainage device according to claim 1, characterized in that: The bottom wall of the first inner cavity (11) is an inclined surface, and along the direction from top to bottom, the inclined surface is inclined from the water inlet of the first inner cavity (11) to the side where the connecting hole (13) is located.

10. A dishwasher, comprising a water cup (100), characterized in that: It also comprises the drainage device according to any one of claims 1 to 9, wherein the water cup (100) is connected to the first inner cavity (11).

Images