Pollution discharge device and cleaning base station

Abstract

The utility model discloses a blowdown device and a cleaning base station, relates to the field of cleaning equipment, and mainly aims to enable a blowdown structure of a cleaning tank of the base station to be simpler and reduce cost. According to the main technical scheme, the blowdown device is characterized in that the blowdown device comprises a storage bin, the storage bin comprises a storage cavity, a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with the storage cavity; and the driving assembly is used for changing the size of the storage cavity, so that when the size of the storage cavity is increased, liquid is extracted through the liquid inlet, and when the size of the storage cavity is decreased, the liquid is discharged through the liquid outlet.

Description

Technical Field

[0001] The utility model relates to the field of cleaning equipment, in particular to a sewage discharge device and a cleaning base station. Background Art

[0002] In the current intelligent cleaning field, there is a robot system that can automatically mop the floor. In this system, the mop can usually be automatically cleaned in the base station cleaning tank. After the mop is cleaned, the sewage in the base station cleaning tank needs to be discharged.

[0003] In the related art, a vacuum pump is usually used to generate negative pressure in the sewage tank, so that the sewage in the cleaning tank of the base station is sucked into the sewage tank, and then the sewage in the sewage tank is discharged through the sewage pump; or, a vacuum pump is used in conjunction with an air path reversing device to generate negative pressure in the sewage tank to suck the sewage in the cleaning tank into the sewage tank, and then the air path is converted to generate positive pressure in the sewage tank, thereby discharging the sewage.

[0004] The above methods all use more parts, have more complicated structures and are more costly. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides a sewage discharge device and a cleaning base station, the main purpose of which is to make the sewage discharge structure of the base station cleaning tank simpler and reduce the cost.

[0006] In a first aspect, an embodiment of the utility model provides a sewage discharge device, comprising:

[0007] A storage bin, the storage bin comprising a storage cavity, and a liquid inlet and a liquid outlet communicated with the storage cavity;

[0008] A drive assembly is used to change the volume of the storage chamber so that the storage chamber draws liquid through the liquid inlet when the volume increases, and discharges the liquid through the liquid discharge port when the volume decreases.

[0009] Further, the storage bin deformable member has a first cavity disposed therein;

[0010] The driving assembly is connected to the deformable member and is used to change the shape of the deformable member to change the volume of the first cavity.

[0011] Furthermore, the storage bin further comprises a bin body, the bin body is connected to the deformable member, a second cavity is arranged in the bin body, and the first cavity and the second cavity are connected to form the storage cavity;

[0012] The liquid inlet and the liquid outlet are disposed on the bin body and are communicated with the second cavity respectively.

[0013] Furthermore, the deformable member is a bellows-shaped structure, one end of the deformable member is connected to the bin body, and the other end of the deformable member is connected to the driving assembly, and the driving assembly is used to stretch or compress the deformable member along the extension and contraction direction of the deformable member to change the volume of the second cavity.

[0014] Furthermore, the deformable member is made of plastic.

[0015] Furthermore, the sewage discharge device also includes:

[0016] A guide member is connected to the deformable member and is used to provide guidance for the extension and retraction of the deformable member.

[0017] Furthermore, the sewage discharge device also includes:

[0018] a housing, wherein at least the deformable member is disposed in the housing;

[0019] The guide member includes a slide groove and a slide rail, one of the slide groove and the slide rail is arranged on the inner wall of the shell, and the other of the slide groove and the slide rail is arranged on the deformable member, the slide groove and the slide rail extend along the telescopic direction of the deformable member, and the slide groove is slidably connected to the slide rail.

[0020] Furthermore, the driving assembly includes a driving member and a transmission mechanism, the driving member is connected to the deformable member through the transmission mechanism, and the driving member is used to stretch or compress the deformable member through the transmission mechanism.

[0021] Furthermore, the transmission mechanism includes a reduction gear box and a connecting rod, the input end of the reduction gear box is connected to the output end of the driving member, the reduction gear box includes an output end gear, one end of the connecting rod is rotatably connected to the outer edge of the output end gear, and the other end of the connecting rod is rotatably connected to the deformable member, and the connecting rod is used to move with the rotation of the output end gear to stretch or compress the deformable member.

[0022] Further, a first one-way valve is provided at the liquid inlet, and the flow direction of the first one-way valve is from the outside of the storage cavity to the inside of the storage cavity; and / or

[0023] A second one-way valve is disposed at the liquid discharge port, and a flow direction of the second one-way valve is from the inside of the storage cavity to the outside of the storage cavity.

[0024] Furthermore, the first one-way valve and / or the second one-way valve is a duckbill valve.

[0025] Further, the number of the first one-way valve is one or more;

[0026] and / or,

[0027] The number of the second one-way valve is one or more.

[0028] In a second aspect, an embodiment of the utility model further provides a cleaning base station, comprising the aforementioned sewage discharge device.

[0029] By means of the above technical solution, the utility model has at least the following beneficial effects:

[0030] In the technical solution provided by the embodiment of the utility model, the liquid inlet of the storage bin can be connected to the cleaning tank of the base station, and the driving component can change the volume size of the storage cavity of the storage bin, so that when the volume of the storage cavity becomes larger, a negative pressure can be generated in the storage bin, thereby realizing the liquid in the cleaning tank being drawn into the storage cavity; when the volume of the storage cavity becomes smaller, a positive pressure can be generated in the storage bin, thereby realizing the discharge of the liquid drawn into the storage cavity; and so on and so forth, the suction and discharge of the liquid in the cleaning tank can be realized. Compared with the prior art, the technical solution provided by the embodiment of the utility model has a simple structure and a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following drawings of the present invention are used as a part of the embodiments of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principle of the present invention.

[0032] In the attached figure:

[0033] Figure 1 A schematic diagram of the structure of a sewage discharge device provided in an embodiment of the utility model;

[0034] Figure 2 for Figure 1 AA section view;

[0035] Figure 3 A schematic diagram of the structure of a sewage discharge device provided by an embodiment of the utility model after the shell is removed;

[0036] Figure 4 A schematic diagram of the structure of a sewage discharge device provided by an embodiment of the utility model after removing a part of the shell and the storage bin;

[0037] Figure 5 for Figure 1 Schematic diagram of the cross-section along the BB axis.

[0038] Description of reference numerals:

[0039] 1-storage bin; 11-bin body; 111-liquid inlet 111; 112-liquid outlet; 113-second cavity; 12-deformable member; 121-first cavity; 122-deformable member body; 123-end cover; 2-driving assembly; 3-sealing member; 4-housing; 1231-slide groove; 41-slide rail; 21-driving member; 22-reduction gear box; 23-connecting rod; 221-output end gear; 222-input end worm; 223-first gear; 224-second gear; 5-first one-way valve; 51-first pipe joint; 6-second one-way valve; 61-second pipe joint. DETAILED DESCRIPTION

[0040] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0042] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the utility model provides a sewage discharge device, including a storage bin 1, which includes a storage cavity, and a liquid inlet 111 and a liquid discharge port 112 connected to the storage cavity, the liquid inlet 111 can be used to communicate with the cleaning tank of the base station through a liquid inlet pipe, and the liquid discharge port 112 can be connected to a floor drain or other cavity through the liquid discharge pipe; a drive component 2, the drive component 2 is used to change the volume of the storage cavity, so that the storage cavity draws liquid in the cleaning tank through the liquid inlet 111 when the volume increases, and discharges the liquid through the liquid discharge port 112 when the volume decreases.

[0044] The sewage discharge device provided by the embodiment of the utility model has a liquid inlet 111 of the storage bin 1 that can be connected to the cleaning tank of the base station, and the driving component 2 can change the volume of the storage chamber of the storage bin 1, so that when the volume of the storage chamber increases, negative pressure can be generated in the storage bin 1, thereby realizing the liquid in the cleaning tank being pumped into the storage chamber; when the volume of the storage chamber decreases, positive pressure can be generated in the storage bin 1, thereby realizing the liquid pumped into the storage chamber being discharged, and so on, the suction and discharge of the liquid in the cleaning tank can be realized. Compared with the prior art, the technical solution provided by the embodiment of the utility model has a simple structure and low cost. Moreover, the sewage discharge device provided by the embodiment of the utility model has no restriction on the liquid level in the cleaning tank, as long as the liquid inlet 111 is immersed in the liquid in the cleaning tank through the liquid inlet pipe, when the volume of the storage chamber increases and negative pressure is generated in the storage bin 1, the liquid in the cleaning tank can be sucked into the storage bin 1, and discharged when the volume of the storage chamber decreases.

[0045] It can be understood that when the volume of the storage cavity increases, the drain port 112 can be in a closed state, so that negative pressure is generated in the storage bin 1, and the liquid in the cleaning tank enters the storage bin 1 through the liquid inlet 111; correspondingly, when the volume of the storage cavity decreases, the liquid inlet 111 can be in a closed state, so that positive pressure can be generated in the storage bin 1, and the liquid in the storage bin 1 is discharged to the floor drain through the drain port 112.

[0046] The storage bin 1 may have a variety of structural forms, as long as the volume of its storage cavity can be changed under the action of the driving component 2. For example, the storage bin 1 may be a telescopic cylinder structure, that is, the storage bin 1 includes a cylinder body and a piston movably disposed in the cylinder body, and the space enclosed between the cylinder body and the piston forms a storage cavity. The driving component 2 drives the piston to move relative to the cylinder body to change the volume of the storage cavity.

[0047] In the present utility model embodiment, see Figure 2 , Figure 3 and Figure 4 The storage bin 1 includes a deformable member 12 , in which a first cavity 121 is disposed; the driving assembly 2 is connected to the deformable member 12 and is used to change the shape of the deformable member 12 to change the volume of the first cavity 121 .

[0048] Among them, the storage bin can also include a bin body 11, which is connected to the deformable part 12, and a second cavity 113 is arranged in the bin body 11, and the second cavity 113 is connected to the first cavity 121 to form a storage cavity; the liquid inlet 111 and the liquid outlet 112 are opened on the bin body 11, and are respectively connected to the second cavity 113.

[0049] In the above embodiment, the first cavity 121 and / or the second cavity 113 can be used to store liquid, and the first cavity 121 is used to change its shape under the action of the driving component 2 to change the pressure state of the storage cavity, so that the storage bin 1 can suck or discharge liquid. Specifically, taking the second cavity 113 for storing liquid as an example, when the driving component 2 changes the shape of the deformable member 12 to increase the volume of the first cavity 121, the storage cavity can form a negative pressure, and the liquid in the cleaning tank can be sucked into the second cavity 113; when the driving component 2 changes the shape of the deformable member 12 again to reduce the volume of the first cavity 121, the storage cavity can form a positive pressure, so that the liquid in the second cavity 113 is discharged. The structure is simple and reliable.

[0050] It should be noted that in order to ensure the storage bin 1's function of sucking and discharging liquid, the storage bin 1 should be a sealed structure, that is, the bin body 11 and the deformable member 12 should be sealed and connected so that the second cavity 113 and the first cavity 121 form a sealed storage cavity.

[0051] In some embodiments, see Figure 2 , Figure 3 and Figure 4 The deformable member 12 can be a bellows-shaped structure, one end of the deformable member 12 is connected to the bin body 11, and the other end of the deformable member 12 is connected to the driving component 2; the driving component 2 is used to stretch or compress the deformable member 12 along the extension direction of the deformable member 12 to change the volume of the first cavity 121.

[0052] In the above embodiment, by setting the deformable member 12 as a bellows-shaped structure, the deformable member 12 can be compressed or stretched along its corrugated folds, so that it is easy to change its shape and change the volume of the second cavity 113. The driving component 2 only needs to stretch or compress the deformable member 12 along the expansion and contraction direction of the deformable member 12 to change the volume of the second cavity 113. The operation is more convenient and the use is more reliable.

[0053] To ensure the sealing of the storage chamber, see Figure 2 A sealing member 3 may be provided between the deformable member 12 and the bin body 11. Specifically, a mounting hole communicating with the second cavity 113 may be provided on the bin body 11. One end of the deformable member 12 is inserted into the mounting hole, and a sealing ring is provided between the bin body 11 and the deformable member 12.

[0054] In order to prevent the deformable member 12 from abnormally deforming under negative pressure, in some embodiments, the deformable member 12 may be made of plastic material, so that the deformable member 12 has a certain hardness, which can prevent the deformable member 12 from abnormally deforming under negative pressure, thereby ensuring that it works normally under the action of the driving component 2. Moreover, the service life of the deformable member 12 made of plastic material can also be guaranteed. Specifically, the service life of the deformable member 12 made of plastic material can reach about 1 million times.

[0055] In order to facilitate the normal operation of the deformable member 12 , the sewage discharge device may further include a guide member, which is connected to the deformable member 12 and is used to provide guidance for the extension and retraction of the deformable member 12 .

[0056] In some embodiments, see Figure 1 , Figure 3 , Figure 4 and Figure 5 , and combined with Figure 1 , Figure The sewage discharge device may also include a shell 4, at least the deformable member 12 is arranged in the shell 4; the guide member may include a slide groove 1231 and a slide rail 41, and one of the slide groove 1231 and the slide rail 41 is arranged on the inner wall of the shell 4, and the other of the slide groove 1231 and the slide rail 41 is arranged on the deformable member 12, the slide groove 1231 and the slide rail 41 extend along the telescopic direction of the deformable member 12, and the two are slidably connected.

[0057] In the above embodiment, when the deformable member 12 is stretched or compressed by the driving assembly 2, the slide groove 1231 and the slide rail 41 are slidably connected. Since the slide groove 1231 and the slide rail 41 both extend along the telescopic direction of the deformable member 12, the slide groove 1231 and the slide rail 41 cooperate to provide a guide for the telescopic movement of the deformable member 12, thereby better avoiding abnormal deformation of the deformable member 12, and further facilitating the normal operation of the deformable member 12.

[0058] Specifically, the slide rail 41 may be a convex ridge protruding from the surface of the housing 4 or the deformable member 12. In addition, for ease of use, the slide groove 1231 may be provided on the deformable member 12, and the slide rail 41 may be provided on the housing 4. Moreover, the number of the slide rail 41 and the slide groove 1231 may be multiple, and the multiple slide grooves 1231 are arranged at intervals around the circumference of the deformable member 12, and the multiple slide rails 41 are arranged at intervals around the circumference of the housing 4, and each slide rail 41 is slidably connected to the corresponding slide groove 1231.

[0059] In some embodiments, see Figure 3 The deformable member 12 may include a deformable member body 122 and an end cap 123. The end cap 123 may be connected to the end of the deformable member body 122. The deformable member 12 is connected to the driving assembly 2 via the end cap 123. Moreover, the aforementioned slide groove 1231 or slide rail 41 may be provided on the end cap 123.

[0060] It is understandable that the drive assembly 2 may have various structural forms, as long as it can stretch or compress the deformable member 12. For example, the drive assembly 2 may be a telescopic cylinder or a telescopic rod.

[0061] In the embodiment of the utility model, the driving assembly 2 may include a driving member 21 and a transmission mechanism. The driving member 21 is connected to the deformation member 12 through the transmission mechanism. The driving member 21 is used to stretch or compress the deformation member 12 through the transmission mechanism. It is reliable to use and has low cost.

[0062] In some embodiments, see Figure 3 and Figure 4 The transmission mechanism may include a reduction gear box 22 and a connecting rod 23. The input end of the reduction gear box 22 is connected to the output end of the driving member 21. The reduction gear box 22 includes an output end gear 221. One end of the connecting rod 23 is rotatably connected to the outer edge of the output end gear 221. The other end of the connecting rod 23 is rotatably connected to the deformation member 12, specifically, it can be rotatably connected to the end cover 123 of the deformation member 12. The connecting rod 23 is used to move with the rotation of the output end gear 221 to stretch or compress the deformation member 12.

[0063] In the above embodiment, the driving member 21 can be a motor; the reduction box 22 can include an input end worm 222, a first gear 223, a second gear 224 and the aforementioned output end gear 221, the input end worm 222 is connected to the output shaft of the motor, the input end worm 222, the first gear 223, the second gear 224 and the output end gear 221 are meshed with each other, one end of the connecting rod 23 is rotatably connected to the outer edge of the output end gear 221, and the other end of the connecting rod 23 is rotatably connected to the deformation member 12. When the reduction box 22 is started, the connecting rod 23 moves up and down with the rotation of the output end gear 221, thereby stretching or compressing the deformation member 12 to change the volume of the first cavity 121. Among them, the first gear 223, the second gear 224 and the output end gear 221 can all be double-row gears to improve the working stability of the reduction box 22.

[0064] Alternatively, in the above embodiment, the connecting rod 23 can be replaced by a cam mechanism, the cam of the cam mechanism can be connected to the output end gear 221, and the push rod of the cam mechanism can be connected to the deformation part 12, so that when the cam rotates with the output end gear 221, the push rod is driven to stretch or compress the deformation part 12.

[0065] For ease of operation, in some embodiments, see Figure 1 and Figure 4 A first one-way valve 5 is provided at the liquid inlet 111, and the flow direction of the first one-way valve 5 is from the outside of the storage chamber to the inside of the storage chamber; and / or a second one-way valve 6 is provided at the liquid discharge port 112, and the flow direction of the second one-way valve 6 is from the inside of the storage chamber to the outside of the storage chamber.

[0066] In the above embodiment, by setting the first one-way valve 5 and / or the second one-way valve 6, and when both are set, it can be achieved that when the volume of the storage chamber becomes larger, the drain port 112 can be in a closed state, so that a negative pressure is generated in the storage bin 1, and the liquid in the cleaning tank is sucked into the storage bin 1 through the first one-way valve 5; correspondingly, when the volume of the storage chamber becomes smaller, the liquid inlet 111 can be in a closed state, so that a positive pressure can be generated in the storage bin 1, and the liquid in the storage bin 1 is discharged to the floor drain through the second one-way valve 6.

[0067] Alternatively, when only the first one-way valve 5 is provided, the drain port 112 may be closed by other valves or devices. When the volume of the storage cavity increases, negative pressure is generated in the storage bin 1, and the liquid in the cleaning tank is sucked into the storage bin 1 through the first one-way valve 5. Correspondingly, the drain port 112 may also be opened by other valves or devices. When the volume of the storage cavity decreases, the liquid inlet 111 is in a closed state, a positive pressure may be generated in the storage bin 1, and the liquid in the storage bin 1 is discharged to the floor drain through the drain port 112.

[0068] Alternatively, when only the second one-way valve 6 is provided, the liquid inlet 111 can be opened by other valves or devices, so that when the volume of the storage cavity increases, the liquid discharge port 112 can be in a closed state, negative pressure is generated in the storage bin 1, and the liquid in the cleaning tank is sucked into the storage bin 1 through the liquid inlet 111; accordingly, the liquid inlet 111 can also be closed by other valves or devices, and when the volume of the storage cavity decreases, positive pressure can be generated in the storage bin 1, and the liquid in the storage bin 1 is discharged to the floor drain through the second one-way valve 6.

[0069] In some embodiments, the first one-way valve 5 and / or the second one-way valve 6 can be a duckbill valve. The duckbill valve is usually a rubber structure, which not only meets the anti-corrosion requirements but also has better sealing performance. Moreover, the duckbill valve has a long service life, is easy to install, and has a low cost.

[0070] In order to facilitate the connection of the liquid inlet 111 and the liquid outlet 112 to the pipeline, in some embodiments, see Figure 1 The liquid inlet 111 can be connected to the first pipe joint 51 , and the liquid outlet 112 can be connected to the second pipe joint 61 .

[0071] In some embodiments, the number of the first one-way valve 5 may be one or more; and / or the number of the second one-way valve 6 may be one or more.

[0072] Among them, if the number of first one-way valves 5 is two or more, two or more first one-way valves 5 are connected in series, and the flow direction is consistent; and / or, if the number of second one-way valves 6 is two or more, two or more second one-way valves 6 are connected in series, and the flow direction is consistent, so that in the abnormal situation that one of the corresponding one-way valves is stuck with sand or other foreign matter, resulting in the failure of one-way opening and closing, other corresponding one-way valves can also exist to achieve one-way opening and closing, thereby ensuring the normal operation of the sewage discharge device.

[0073] An embodiment of the utility model provides a cleaning base station, comprising the aforementioned sewage discharge device.

[0074] A cleaning base station provided by an embodiment of the utility model includes the aforementioned sewage discharge device. Therefore, the cleaning base station includes all the beneficial effects of the sewage discharge device, which will not be described in detail here.

[0075] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sewage discharge device, characterized in that: include: A storage bin, the storage bin comprising a storage cavity, and a liquid inlet and a liquid outlet communicated with the storage cavity; A drive assembly is used to change the volume of the storage chamber so that the storage chamber draws liquid through the liquid inlet when the volume increases, and discharges the liquid through the liquid discharge port when the volume decreases.

2. The sewage discharge device according to claim 1, characterized in that: The storage bin includes a deformable member, and a first cavity is provided in the deformable member; The driving assembly is connected to the deformable member and is used to change the shape of the deformable member to change the volume of the first cavity.

3. The sewage discharge device according to claim 2, characterized in that: The storage bin further comprises a bin body, the bin body is connected to the deformable member, a second cavity is arranged in the bin body, and the first cavity and the second cavity are connected to form the storage cavity; The liquid inlet and the liquid outlet are disposed on the bin body and are communicated with the second cavity respectively.

4. The sewage discharge device according to claim 3, characterized in that: The deformable member is a bellows-shaped structure, one end of the deformable member is connected to the bin body, and the other end of the deformable member is connected to the driving assembly.

5. The sewage discharge device according to claim 2, characterized in that: The material of the deformable member is plastic.

6. The sewage discharge device according to claim 4, characterized in that: Also includes: A guide member is connected to the deformable member and is used to provide guidance for the extension and retraction of the deformable member.

7. The sewage discharge device according to claim 6, characterized in that: Also includes: a housing, wherein at least the deformable member is disposed in the housing; The guide member includes a slide groove and a slide rail, one of the slide groove and the slide rail is arranged on the shell, the other of the slide groove and the slide rail is arranged on the deformable member, and the slide groove is slidably connected to the slide rail.

8. The sewage discharge device according to claim 4, characterized in that: The driving assembly includes a driving member and a transmission mechanism. The driving member is connected to the deformable member through the transmission mechanism. The driving member is used to stretch or compress the deformable member through the transmission mechanism.

9. The sewage discharge device according to claim 8, characterized in that: The transmission mechanism includes a reduction gear box and a connecting rod; the input end of the reduction gear box is connected to the output end of the driving member, and the reduction gear box includes an output end gear; one end of the connecting rod is rotationally connected to the outer edge of the output end gear, and the other end of the connecting rod is rotationally connected to the deformable member, and the connecting rod is used to move with the rotation of the output end gear to stretch or compress the deformable member.

10. The sewage discharge device according to claim 1, characterized in that: A first one-way valve is disposed at the liquid inlet, and a flow direction of the first one-way valve is from the outside of the storage cavity to the inside of the storage cavity; and / or A second one-way valve is disposed at the liquid discharge port, and a flow direction of the second one-way valve is from the inside of the storage cavity to the outside of the storage cavity.

11. The sewage discharge device according to claim 10, characterized in that: The first one-way valve and / or the second one-way valve is a duckbill valve.

12. The sewage discharge device according to claim 11, characterized in that: The number of the first one-way valve is one or more; and / or, The number of the second one-way valve is one or more.

13. A cleaning base station, characterized in that: Comprising the sewage discharge device as claimed in any one of claims 1 to 12.

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