CN214549326U - Drainage structure of dish washer and dish washer thereof - Google Patents

Abstract

The application belongs to the technical field of dish washing machines, and provides a drainage structure of a dish washing machine, which comprises a water cup, a first drainage pump and a second drainage pump, wherein the first drainage pump comprises a water inlet pipe and a water outlet pipe, the first drainage pump is connected to the side part of the water cup, and the water inlet pipe transversely extends into the bottom side of the water cup; a water outlet pipe of the first drainage pump is connected with a first drainage pipe, and a pipe orifice of the water outlet pipe is provided with a first check sheet for blocking water liquid from flowing back; a water collecting tank for collecting residual water is arranged at the bottom of the water cup, and the height of the water collecting tank is lower than the pipe orifice of the water inlet pipe; the bottom of the water collecting tank of the water cup is provided with a water outlet, the water outlet is connected with a second water discharging pipe, and the second water discharging pump is arranged on the second water discharging pipe. The application also provides a dishwasher applying the drainage structure. This application is improved to the drainage structures of drinking cup, can clear away the residual water in the drinking cup, can simplify the structure of drinking cup again, reduces occupation space.

Description

Drainage structure of dish washer and dish washer thereof

Technical Field

The application belongs to the technical field of dish-washing machines, and particularly relates to a drainage structure of a dish-washing machine and the dish-washing machine.

Background

The existing dish washer on the market generally comprises an inner container and a base, a water cup used for collecting washing water in the inner container is arranged between the bottom of the inner container and the base, and a drainage pump is connected to the water cup and used for draining water in the water cup. In practical applications, in order to save installation space, the drainage pump is generally placed in a horizontal manner, i.e., the rotation center of the impeller of the drainage pump is substantially parallel to the horizontal plane, so that the water inlet of the drainage pump is transversely communicated with the side portion of the water cup. After the washing is finished, the drainage pump is started to discharge water in the water cup, but when the water in the water cup is lower than the upper edge of the water inlet of the drainage pump, air is sucked by the drainage pump, so that residual water cannot be continuously discharged, and the residual water is accumulated in the water cup, so that bacteria are easily bred in the water cup, and the sanitation of the dish washing machine is influenced.

In order to solve the problem of residual water, there are two main solutions commonly used in the prior art, one of which is to connect a drainage pump to the bottom of the water cup so as to drain the residual water accumulated at the bottom of the water cup as much as possible in the drainage process. However, due to the structure, the drainage pump is fixedly connected to the bottom of the water cup, so that the occupied height is increased, the whole occupied space of the water cup is increased, the whole thickness and the size of a base for accommodating the water cup are increased, and the light and small development of the dish washing machine is not facilitated. The other is that a heating device is arranged at the bottom of the water cup, and the residual water at the bottom of the water cup is evaporated by the heating device. To install heating device's structure additional, not only let the bottom structure of drinking cup more complicated, the die sinking manufacturing cost is high, but also need set up corresponding electric connection structure, increase the risk of energy consumption and wading.

Therefore, the problem of removing the residual water of the water cup of the dish washer in the prior art is still a technical problem which is urgently needed to be perfected by dish washer manufacturers at present.

Disclosure of Invention

An object of the embodiment of the application is to provide a drainage structure of a dish washing machine and the dish washing machine, and the drainage structure of a water cup is improved, so that residual water in the water cup can be removed, the structure of the water cup can be simplified, and the occupied space is reduced.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the drainage structure of the dishwasher comprises a water cup, a first drainage pump and a second drainage pump, wherein the first drainage pump comprises a water inlet pipe and a water outlet pipe, the first drainage pump is connected to the side part of the water cup, and the water inlet pipe transversely extends into the bottom side of the water cup; a water outlet pipe of the first drainage pump is connected with a first drainage pipe, and a pipe orifice of the water outlet pipe is provided with a first check sheet for blocking water liquid from flowing back; a water collecting tank for collecting residual water is arranged at the bottom of the water cup, and the height of the water collecting tank is lower than the pipe orifice of the water inlet pipe; the bottom of the water collecting tank of the water cup is provided with a water outlet, the water outlet is connected with a second water discharging pipe, and the second water discharging pump is arranged on the second water discharging pipe.

The application provides a dishwasher drainage structures's beneficial effect lies in: compared with the prior art, the water collecting tank for collecting residual water is arranged at the bottom of the water cup, and the height of the water collecting tank is lower than the pipe orifice of the water inlet pipe, so that the residual small amount of water liquid which cannot be discharged by the first water discharge pump is collected; and the bottom of the water collecting tank is provided with a water outlet which is communicated with the second drainage pump through a second drainage pipe, so that the second drainage pump is started to discharge residual water collected in the water collecting tank, and the residual water in the water cup is removed. Wherein, the first drainage pump can be preferably used as a main drainage pump for water stored in a cup. The second drainage pump is only used as a secondary drainage pump for discharging residual water of the water cup, and the power of the second drainage pump can be optimally set; and the second drainage pump is not directly fixed at the bottom of the water cup, but is connected with the water outlet at the bottom of the water collecting tank through the second drainage pipe, so that compared with the structure that the drainage pump is directly and fixedly connected at the bottom of the water cup in the prior art, the height of the water cup can be effectively reduced, and the occupied space of the water cup arranged in the dishwasher base is reduced.

In addition, because the second drain pipe, the water collecting tank, the interior of the water cup, the first drain pump and the first drain pipe are all communicated, when the second drain pump discharges residual water in the water collecting tank, water in the first drain pipe is easily pumped back to the interior of the water cup at the same time, and the problem of water liquid backflow is caused. Therefore, the first check sheet is arranged on the pipe orifice of the water outlet pipe of the first drainage pump, and the first check sheet is utilized to prevent water liquid in the first drainage pipe from flowing back to the inside of the water cup, so that residual water of the water cup is removed completely, and the cleanness and the sanitation of the dish washing machine are effectively ensured.

The structure of the water cup is improved, and the water cup is provided with a filter positioned on the water collecting tank. The filter is used for preventing the vegetable residue with larger volume in the water cup from entering the water collecting tank and blocking the water outlet; or the water is output from the water outlet and enters the interior of the second drainage pump through the second drainage pipe, so that the blockage of the second drainage pipe or the blockage of the second drainage pump is effectively avoided. The second drain pipe is kept unblocked, and the second drain pump can operate normally.

Further, the filter is a filter screen or a filter grid, and the top surface of the filter is flush with the lower edge of the pipe orifice of the water inlet pipe. The granular vegetable slag with larger volume can be placed on the filter; and because the top surface height of filter and the inlet tube mouth of pipe lower limb parallel and level setting of first exhaust pump, therefore when first exhaust pump started, can arrange away the great granule vegetable residue of volume on the filter simultaneously, improve the clean effect in the drinking cup effectively, avoid breeding the bacterium easily in the drinking cup, ensure the sanitation and hygiene of drinking cup.

The structure of the water cup is improved, the water cup is further provided with a cover body positioned at the bottom of the water collecting tank, the cover body is detachably arranged at the bottom of the water cup, and the water outlet is formed in the cover body. On the one hand, the cover body can be detached for cleaning, which is beneficial to removing pollutants accumulated at the bottom of the water collecting tank after long-time use, namely, pollutants on the cover body, and effectively ensures the cleanness and sanitation of the inside of the water cup. On the other hand, the cover body is provided with the water outlet so that the second water drainage pipe is connected to the water outlet and connected with the cover body, the installation and replacement of pipelines are facilitated, and the installation efficiency is effectively improved.

The drainage structure of the dishwasher is improved, and the second drainage pipe between the second drainage pump and the drainage port is provided with a control valve which is used for controlling the water outlet of the drainage port, so that the problem that the water collecting effect of a water cup is influenced because the water in the water cup leaks out of the drainage port before the residual water is drained is avoided.

The application still provides a dish washer, including prevent the siphon device with the drainage structures of dish washer, prevent being equipped with first water inlet, second water inlet on the siphon device and with outer row mouth of pipe connection of arranging, first drain pipe connection in first water inlet, the second drain pipe connection in the second water inlet. The anti-siphon device is generally provided with a flow meter and an anti-siphon assembly, a water liquid discharge pipeline connected to a water cup is connected with the anti-siphon device, namely the first water discharge pipe and the second water discharge pipe can be respectively connected with the anti-siphon device, so that the dishwasher can control the water inlet and outlet quantity, an effective anti-siphon effect is achieved, the water liquid is effectively prevented from flowing backwards to the inside of the dishwasher, and if the discharged water liquid flows backwards to the water cup, the anti-siphon assembly is achieved.

Furthermore, an arc-shaped pipe is arranged in the anti-siphon device, the middle pipe section of the arc-shaped pipe is higher than the bottom of the water cup, and a pipe orifice at one end of the arc-shaped pipe is communicated with the first water inlet; and the pipe section at the other end of the arc-shaped pipe is respectively communicated with the second water inlet and the outer discharge port. The arc-shaped pipe can be preferably a U-shaped pipe with a middle pipe section higher than the bottom of the water cup, and pipe orifices at two ends of the arc-shaped pipe are positioned below the middle pipe section. A pipe orifice at one end of the arc-shaped pipe is communicated with the first water inlet so as to be connected with the first drainage pipe; the other end pipe section of the arc pipe can be preferably communicated with the second water inlet and the outer discharge port at the position close to the pipe end, so that the arc pipe can be connected with the second water discharge pipe and the outer discharge pipeline respectively. On the one hand, let water liquid that first drainage pump was taken out from the drinking cup through first drain pipe and get into in anti-siphon device's the arc pipe, then discharge outside from outer row of mouth through the arc pipe. On the other hand, the second drainage pump is used for pumping out the residual water in the water collecting tank in the water cup, the residual water enters the arc-shaped pipe of the anti-siphon device through the second drainage pipe and is discharged outside from the outer discharge port in time. Therefore, the water in the water cup is completely removed, and the drainage effect is effectively improved.

Furthermore, a second check sheet is arranged on the pipe orifice of the first drainage pipe, and the pipe orifice of the first drainage pipe extends into the arc pipe to prevent water liquid in the outer drainage pipe from flowing back to the first drainage pipe, so that residual water in the first drainage pipe is effectively prevented from being hoarded, the hidden danger of breeding bacteria is eliminated, and the sanitation of the pipe is effectively ensured.

Still further, a check valve is further arranged on the second drain pipe between the anti-siphon device and the second drain pump to prevent water liquid in the outer discharge pipeline from flowing back into the second drain pump after passing through the arc-shaped pipe and entering the second drain pipe, so that backflow water is effectively prevented from flowing back into the second drain pump, and hidden troubles of breeding bacteria are eliminated.

The anti-siphon device is improved in structure, the anti-siphon device is further provided with a first vent hole and a second vent hole which are communicated with an internal pipeline of the anti-siphon device, and the anti-siphon device is further provided with a drainage anti-siphon piece positioned on the first vent hole and a water inlet anti-siphon piece positioned on the second vent hole, so that a water inlet siphon or drainage siphon effect is prevented from being generated, and the problem of water backflow is effectively solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a first schematic view of a drain structure of a dishwasher according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a cup portion of a drainage structure provided in an embodiment of the present application;

FIG. 3 is a schematic structural view of a portion of a drainage anti-siphon device according to an embodiment of the present application;

FIG. 4 is a schematic view of a drain structure of a dishwasher according to an embodiment of the present application;

fig. 5 is an enlarged view of a portion a of fig. 3.

Wherein, in the figures, the respective reference numerals:

1-anti-siphon device; 11-a first water inlet; 12-a second water inlet; 13-an external discharge port; 14-an outer discharge conduit; 15-an arc-shaped pipe; 16-a first vent; 161-drainage anti-siphon sheet; 17-a second vent; 171-a water intake anti-siphon sheet;

2-a water cup; 20-a water outlet; 21-a water collecting tank; 22-a filter; 23-a cover body;

3-a first drainage pump; 31-a water inlet pipe; 32-water outlet pipe; 33-a first check tab;

4-a second drain pump;

5-a first drain pipe; 51-a second check tab;

6-a second drain pipe; 61-a control valve; 62-one-way valve.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and 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 considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The drain structure of the dishwasher and the dishwasher thereof provided in the embodiments of the present application will now be described. Referring to fig. 1, the dishwasher includes an anti-siphon device 1 and a drain structure of the dishwasher of the present application, which includes a water cup 2, a first drain pump 3, and a second drain pump 4. Referring to fig. 1 and 2, the first drainage pump 3 includes a water inlet pipe 31 and a water outlet pipe 32, the first drainage pump 3 is connected to a side portion of the cup 2, and the water inlet pipe 31 transversely extends into a bottom side of the cup 2, i.e., a side of a bottom P of the cup 2. The water outlet pipe 32 of the first water discharge pump 3 is connected with the first water discharge pipe 5, and a first check sheet 33 for blocking the water liquid from flowing back is arranged on the pipe orifice of the water outlet pipe 32. The bottom P of the water cup 2 is provided with a water collecting tank 21 for collecting residual water, and the height of the water collecting tank 21 is lower than the opening of the water inlet pipe 31 of the first drainage pump 3. The bottom of the water collecting tank 21 of the water cup 2 is provided with a water outlet 20, the water outlet 20 of the water cup 2 is connected with a second water discharging pipe 6, and the second water discharging pump 4 is arranged on the second water discharging pipe 6.

Compared with the prior art, the drainage structure of the dish washing machine provided by the application has the advantages that the water collecting tank 21 for collecting residual water is arranged at the bottom P of the water cup 2, and the height of the water collecting tank 21 is lower than the pipe orifice of the water inlet pipe 31 of the first drainage pump 3, so that the residual water which cannot be discharged by the first drainage pump 3 is collected; and, a water outlet 20 is opened at the bottom P of the water collecting tank 21, the water outlet 20 is communicated with the second water discharging pump 4 through the second water discharging pipe 6, so that the second water discharging pump 4 is started to discharge the residual water collected in the water collecting tank 21, and further the residual water in the water cup 2 is removed.

The first drainage pump 3 can be preferably used as a main drainage pump for storing water in the water cup 2. The second drain pump 4 is only used as a secondary drain pump for discharging the residual water of the water cup 2, and can be optimally set in terms of power; moreover, the second drainage pump 4 is not directly fixed at the bottom P of the water cup 2, but the second drainage pump 4 is connected with the drainage port 20 at the bottom of the water collection tank 21 through the second drainage pipe 6, so that the height of the water cup 2 can be effectively reduced, and the occupied space of the water cup 2 in the dishwasher base can be reduced compared with the structure of directly and fixedly connecting the drainage pump at the bottom of the water cup 2 in the prior art.

In addition, because the second water discharge pipe 6, the water collection tank 21, the interior of the water cup 2, the first water discharge pump 3 and the first water discharge pipe 5 are all communicated, when the second water discharge pump 4 discharges the residual water in the water collection tank 21, the water in the first water discharge pipe 5 is easily and simultaneously pumped back into the water cup 2, so that the problem of water liquid backflow is caused. Therefore, the first check sheet 33 is arranged on the opening of the water outlet pipe 32 of the first drainage pump 3, and the first check sheet 33 is utilized to prevent the water liquid in the first drainage pipe 5 from flowing back to the inside of the water cup 2, so that the residual water in the water cup 2 is cleaned, and the cleanness and the sanitation of the dish-washing machine are effectively ensured.

In another embodiment of the application, the structure of the cup 2 is optimized, and referring to fig. 2, the cup 2 is provided with a filter 22 on the water collection tank 21. The filter 22 is used for preventing the vegetable residue with larger volume in the water cup 2 from entering the water collecting tank 21 and blocking the water outlet 20; or, the water is output from the water outlet 20 and enters the interior of the second drain pump 4 through the second drain pipe 6, so that the blockage of the second drain pipe 6 or the blockage of the second drain pump 4 is effectively avoided. The second drain pipe 6 is left clear and the second drain pump 4 is allowed to function normally.

Wherein the filter 22 may preferably be a filter screen or a filter grid, facilitating the resting of the larger volume of the particulate vegetable residue on the filter 22.

Referring to fig. 2, the top surface of the filter 22 is flush with the lower edge L of the nozzle of the water inlet pipe 31. When the first drainage pump 3 is started, the granular vegetable residues with larger volume on the filter 22 can be drained away at the same time, so that the cleaning effect in the water cup 2 is effectively improved, the situation that bacteria are easily bred in the water cup 2 is avoided, and the cleanness and the sanitation of the water cup 2 are ensured.

In another embodiment of the present application, the structure of the water cup 2 is optimized, and referring to fig. 2, the water cup 2 is further provided with a cover 23 at the bottom of the water collecting tank 21, and the cover 23 is detachably disposed at the bottom P of the water cup 2. The cover 23 can be detached for cleaning, which is beneficial to removing the pollutants accumulated at the bottom of the water collecting tank 21 after long-time use, namely, the pollutants on the cover 23, and effectively ensures the cleanness and sanitation of the inside of the water cup 2.

The drainage port 20 is opened on the cover 23, so that the second drainage pipe 6 is connected to the drainage port 20 and the cover 23, which is beneficial to the installation and replacement of pipelines and effectively improves the installation efficiency.

Referring to fig. 2, a control valve 61 is disposed on the second drain pipe 6 between the second drain pump 4 and the drain port 20, and the control valve 61 is used to control the water outlet of the drain port 20, so as to prevent the water in the water cup 2 from leaking out of the drain port 20 before the residual water is drained, and thus the water collecting effect of the water cup 2 is not affected.

In another embodiment of the present application, referring to fig. 1 and fig. 3, the anti-siphon device 1 is provided with a first water inlet 11, a second water inlet 12 and an outer discharge port 13 connected to an outer discharge pipe 14, the first water discharge pipe 5 is connected to the first water inlet 11, and the second water discharge pipe 6 is connected to the second water inlet 12. This anti-siphon device 1 is last generally to be provided with flowmeter and anti-siphon subassembly, lets connect the water liquid exhaust pipe on drinking cup 2, and this first drain pipe 5 and second drain pipe 6 can be connected with anti-siphon device 1 respectively promptly to the dish washer is controlled business turn over water yield, and plays effectual anti-siphon effect, avoids water liquid to flow backward inside the dish washer effectively, takes place like the condition that discharged water liquid flows back to drinking cup 2.

Referring to fig. 3 and 4, an arc-shaped pipe 15 is arranged in the anti-siphon device 1, a middle pipe section M of the arc-shaped pipe 15 is higher than the bottom P of the water cup 2, and a pipe orifice at one end of the arc-shaped pipe 15 is communicated with the first water inlet 11; the other end of the arc-shaped pipe 15 is respectively communicated with the second water inlet 12 and the outer discharge port 13. The arc-shaped pipe 15 can be preferably a U-shaped pipe with a middle pipe section M higher than the bottom P of the water cup 2, and pipe openings at two ends of the arc-shaped pipe 15 are positioned below the middle pipe section M. A pipe orifice at one end of the arc-shaped pipe 15 is communicated with the first water inlet 11 so as to be connected with the first drainage pipe 5; the other end of the arc-shaped pipe 15 is preferably connected to the second water inlet 12 and the outer discharge port 13 at a position close to the pipe end, so that the arc-shaped pipe 15 can be connected to the second water discharge pipe 6 and the outer discharge pipe 14. On one hand, the water pumped by the first drainage pump 3 from the water cup 2 enters the arc-shaped pipe 15 of the anti-siphon device 1 through the first drainage pipe 5, and then is discharged outside from the outer discharge port 13 through the arc-shaped pipe 15. On the other hand, the second drainage pump 4 is allowed to pump out the residual water in the water collection tank 21 of the water cup 2, and the residual water enters the arc-shaped pipe 15 of the anti-siphon device 1 through the second drainage pipe 6 and is timely discharged to the outside through the outer discharge port 13. Therefore, the water in the water cup 2 is completely removed, and the drainage effect is effectively improved.

Referring to fig. 3 and 4, a second check plate 51 is disposed on the nozzle of the first drainage pipe 5, and the nozzle of the first drainage pipe 5 extends into the arc-shaped pipe 15 to prevent the water in the drainage pipe 14 from flowing back into the first drainage pipe 5, so as to effectively prevent residual water from being accumulated in the first drainage pipe 5, eliminate the hidden trouble of bacteria breeding, and effectively ensure the sanitation of the pipe.

Referring to fig. 4, a check valve 62 is further disposed on the second water drainage pipe 6 between the anti-siphon device 1 and the second water drainage pump 4 to prevent the water liquid in the external drainage pipe 14 from flowing back into the second water drainage pump 4 after passing through the arc pipe 15 and entering the second water drainage pipe 6, so as to effectively prevent the backflow water from flowing back into the second water drainage pump 4 to eliminate the hidden danger of bacteria breeding.

Referring to fig. 3 and 5, the anti-siphon device 1 is further provided with a first vent hole 16 and a second vent hole 17 communicated with the internal pipeline of the anti-siphon device 1, and the anti-siphon device 1 is further provided with a drainage anti-siphon sheet 161 positioned on the first vent hole 16 and a water inlet anti-siphon sheet 171 positioned on the second vent hole 17 to prevent the occurrence of water inlet siphon or drainage siphon effect and effectively solve the problem of water backflow.

Referring to fig. 1 to 4 together, the operation principle of the drain structure of the dishwasher according to the embodiment of the present application is as follows:

1. the first drainage pump 3 is used as a main drainage pump, the first drainage pump 3 is started to drive the water flow in the water cup 2, and the first check sheet 33 arranged on the water outlet pipe 32 of the first drainage pump 3 is pushed to be opened, so that most of the water liquid in the water cup 2 is drained through the first drainage pipe 5. The water flow path is as follows: the water cup 2 → the water inlet pipe 31 of the first drain pump 3 → the interior of the first drain pump 3 → the water outlet pipe 32 of the first drain pump 3 → the first check plate 33 → the first drain pipe 5 → the first water inlet 11 on the anti-siphon device 1 → the arced pipe 15 → the outer discharge port 13 → the outer discharge pipe 14, and is discharged to the outside of the dishwasher.

2. The remaining small amount of residual water is collected in the water collection sump 21 of the water cup 2, the first drain pump 3 is turned off, the second drain pump 4 acts as a sub-drain pump, and the second drain pump 4 is turned on, allowing the control valve 61 to open and drain the residual water in the water collection sump 21 at the bottom P of the water cup 2. The water flow path of the residual water is as follows: the water collecting sump 21 of the cup 2 → the water discharge opening 20 → the second water discharge pipe 6 → the control valve 61 → the second drain pump 4 → the second water inlet 12 on the anti-siphon device 1 → the arc pipe 15 → the outer discharge opening 13 → the outer discharge pipe 14, and is discharged to the outside of the dishwasher.

Therefore, water liquid in the water cup 2 is removed completely, the purpose of zero residual water of the water cup 2 is achieved, the hidden danger that bacteria are bred in the water cup 2 is effectively eliminated, and the cleanness and the sanitation of the dish washing machine are further ensured.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The drainage structure of the dish washing machine is characterized by comprising a water cup, a first drainage pump and a second drainage pump, wherein the first drainage pump comprises a water inlet pipe and a water outlet pipe, the first drainage pump is connected to the side part of the water cup, and the water inlet pipe transversely extends into the bottom side of the water cup; a water outlet pipe of the first drainage pump is connected with a first drainage pipe, and a pipe orifice of the water outlet pipe is provided with a first check sheet for blocking water liquid from flowing back; a water collecting tank for collecting residual water is arranged at the bottom of the water cup, and the height of the water collecting tank is lower than the pipe orifice of the water inlet pipe; the bottom of the water collecting tank of the water cup is provided with a water outlet, the water outlet is connected with a second water discharging pipe, and the second water discharging pump is arranged on the second water discharging pipe.

2. The drain structure of a dishwasher according to claim 1, wherein: the water cup is provided with a filter positioned on the water collecting tank.

3. The drain structure of a dishwasher according to claim 2, wherein: the filter is a filter screen or a filter grid, and the top surface of the filter is flush with the lower edge of the pipe orifice of the water inlet pipe.

4. The drain structure of a dishwasher according to claim 1, wherein: the water cup is further provided with a cover body located at the bottom of the water collecting groove, the cover body is detachably arranged at the bottom of the water cup, and the water outlet is formed in the cover body.

5. The drain structure of a dishwasher according to any one of claims 1 to 4, wherein: and a control valve is arranged on the second drain pipe between the second drain pump and the drain outlet.

6. A dishwasher, characterized by: the drain structure of the dishwasher comprises an anti-siphon device and a drain structure of the dishwasher according to any one of claims 1 to 5, wherein the anti-siphon device is provided with a first water inlet, a second water inlet and an outer discharge port connected with an outer discharge pipeline, the first drain pipe is connected with the first water inlet, and the second drain pipe is connected with the second water inlet.

7. The dishwasher of claim 6, wherein: an arc-shaped pipe is arranged in the anti-siphon device, the middle pipe section of the arc-shaped pipe is higher than the bottom of the water cup, and a pipe orifice at one end of the arc-shaped pipe is communicated with the first water inlet; and the pipe section at the other end of the arc-shaped pipe is respectively communicated with the second water inlet and the outer discharge port.

8. The dishwasher of claim 7, wherein: the pipe orifice of the first water drainage pipe is provided with a second check sheet, and the pipe orifice of the first water drainage pipe extends into the arc-shaped pipe.

9. The dishwasher of claim 6, wherein: and a one-way valve is also arranged on the second water discharge pipe between the anti-siphon device and the second water discharge pump.

10. The dishwasher of claim 6, wherein: the anti-siphon device is also provided with a first vent hole and a second vent hole which are communicated with an internal pipeline of the anti-siphon device, and the anti-siphon device is also provided with a drainage anti-siphon sheet positioned on the first vent hole and a water inlet anti-siphon sheet positioned on the second vent hole.

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