Cleaning machine

Abstract

The utility model relates to a cleaning machine, which comprises a box body with a washing chamber, a cleaning device, a cleaning device and a control device, wherein the side wall of the box body is provided with a mounting port communicated with the washing chamber; the overflow base is installed on the outer side wall of the box body and covers the installation opening in the side wall of the box body, an overflow cavity with an opening and an overflow flow channel are defined in the overflow base, the opening of the overflow cavity is opposite to the installation opening in the side wall of the box body, and the overflow flow channel is provided with an overflow opening which is communicated with the overflow cavity and used for discharging water flow in the washing cavity. The drainage pipe is connected to the outlet position of the overflow flow channel, and an air outlet for exhausting air outwards is formed in the drainage pipe. If the sewer pipeline is blocked or a valve on the pipeline fails to be opened, water or odor which cannot be discharged downwards in time in the drainage pipe can be emitted from the air outlet and cannot flow back into the inner cavity of the cleaning machine, the cleanliness of the inner cavity of the cleaning machine is guaranteed, and in addition, a user can more easily recognize whether the drainage pipeline is blocked or not in time and overhaul or dredge the pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a cleaning machine. Background Art

[0002] As people's living standards continue to improve, kitchen cleaning machines, such as dishwashers, as a kitchen appliance, are increasingly entering households. Currently, the cleaning machines on the market are generally divided into three types: desktop, cabinet, and tank. Among them, desktop dishwashers are integrated independent structures and are generally placed on the table for use; cabinet dishwashers are also independent structures, but need to be embedded in kitchen cabinets for use; tank dishwashers are combined with sinks and are generally installed in kitchen cabinets for use.

[0003] The various forms of dishwashers mentioned above generally use a water pump to lift water and spray it onto the dishes in the cleaning space to achieve the cleaning effect. The box body of the washing chamber is provided with an overflow seat, which can be connected to an external water inlet pipe, and is also convenient for the overflow water to be discharged. For example, the Chinese utility model patent application with application number CN202022220774.9 (authorization announcement number: CN214760956U) discloses a cleaning machine, including a box body with a washing chamber, a water inlet is opened on the side wall of the box body, and a water inlet pipe connected to the water inlet is arranged on the outside of the box body, and an ultrasonic generator capable of generating bubbles in the inlet water is arranged in the water inlet pipe. The water inlet is located in the middle or upper part of the side wall of the box body and forms an overflow port. The outer side wall of the box body is provided with an overflow seat connected to the overflow port, and the overflow seat has a first opening connected to the output end of the water inlet pipe and a second opening for the overflow water to be discharged. The side wall of the overflow seat is provided with an opening corresponding to the overflow port, the overflow seat is hollow inside to form an overflow cavity, the first opening is provided on the bottom wall of the overflow seat and is connected with the water inlet and relatively isolated from the overflow cavity.

[0004] However, the existing cleaning machines still have certain shortcomings. The second opening on the overflow seat for discharging overflow water is connected to a conventional drain pipe and a sewer pipe. In order to prevent the sewer pipe from being blocked and the waste water from flowing back to the cleaning machine through the overflow port, a one-way valve is usually provided on the path of the drain pipe. However, sometimes the one-way valve fails, which will cause the cleaning machine to be unable to drain water normally. Water or odor will easily flow back into the inner cavity of the cleaning machine, reducing the air quality inside the cleaning machine and the surrounding environment, causing discomfort to the user. In particular, the odor may contain bacteria, viruses and other harmful substances, which will re-contaminate the inside of the cleaning machine and affect the cleaning effect.

[0005] Therefore, existing cleaning machines also need further improvement. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a cleaning machine which can effectively prevent the odor generated by the blockage of the drainage pipe from flowing back into the inner cavity of the cleaning machine in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a cleaning machine, comprising:

[0008] A box body having a washing chamber, wherein a mounting opening communicating with the washing chamber is provided on a side wall of the box body;

[0009] An overflow seat is installed on the outer side wall of the box body and covers the installation opening on the side wall of the box body. The overflow seat defines an overflow chamber with an open opening and an overflow flow channel. The open opening of the overflow chamber is opposite to the installation opening on the side wall of the box body. The overflow flow channel has an overflow port that is connected to the overflow chamber for discharging water in the washing chamber. The overflow flow channel also includes a drain pipe connected to the outlet position of the overflow flow channel, and the drain pipe is provided with an outlet for discharging gas to the outside.

[0010] As a preferred solution, the drain pipe as a whole extends vertically, and the main body of the drain pipe is also connected to an exhaust branch pipe extending obliquely upward, and the top port of the exhaust branch pipe is the exhaust outlet.

[0011] As another preferred embodiment, the drain pipe includes an upper pipe and a lower pipe arranged in sequence from top to bottom, the upper end of the lower pipe is a conical tube structure with a diameter gradually increasing from bottom to top, the lower port of the lower pipe is connected to the outer peripheral edge of the conical tube structure by connecting ribs, and the upper port of the conical tube structure is the air outlet.

[0012] As another preferred embodiment, the drainage pipe includes a first pipe and a second pipe, both of which are vertically arranged and staggered in the up and down directions. The bottom of the first pipe is connected to the second pipe through a horizontally extending cross pipe, and the top port of the second pipe is higher than the cross pipe, thereby forming the air outlet.

[0013] As another preferred embodiment, the drain pipe includes a first pipe and a second pipe, both of which are vertically arranged and staggered in the up and down directions. The bottom of the first pipe is connected to the upper part of the second pipe through a first inclined pipe extending obliquely upward, and the bottom of the first pipe is also connected to the lower part of the second pipe through a second inclined pipe extending obliquely downward, and the top port of the second pipe is higher than the first inclined pipe, thereby forming the air outlet.

[0014] In order to facilitate connection with other drainage pipelines (such as the drain pipe of a conventional sink), a connecting branch pipe is also provided on the drainage pipe.

[0015] In order to facilitate the overflowing water to flow smoothly downward, the main body of the overflow seat is also provided with an overflow pipe, which is formed into an inverted L-shaped structure. The end of the transverse part of the L-shaped overflow pipe is connected to the overflow port, and the inner cavity of the overflow pipe constitutes the overflow channel.

[0016] As an improvement, the drain pipe is connected to the lower end of the vertical portion of the L-shaped overflow pipe.

[0017] As an improvement, the overflow port is located higher than the bottom wall of the overflow chamber. When the cleaning machine is working normally, the water sprayed by the spray arm may splash into the overflow chamber of the overflow seat. In order to prevent the water from flowing away from the overflow port and thus affecting the cleaning degree, the overflow surface of the overflow port (that is, the plane where the lowest position of the overflow port is located) is raised.

[0018] In order to prevent sewage from flowing back, a one-way valve for allowing water to flow in one direction is also provided on the drainage pipe.

[0019] Compared with the prior art, the advantages of the utility model are as follows: by connecting a drain pipe at the outlet of the overflow channel and providing an outlet for gas to be discharged to the outside on the drain pipe, if the sewer pipe is blocked or the valve on the pipe fails to open, the water or odor that cannot be discharged in time in the drain pipe will emerge from the outlet and will not flow back into the inner cavity of the cleaning machine, thereby ensuring the cleanliness of the inner cavity of the cleaning machine. In addition, it is also easier for users to identify whether the drainage pipe is blocked in time and to inspect or dredge the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the cleaning machine of Example 1 of the utility model;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the cleaning machine of Embodiment 1 of the utility model from another angle;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the cleaning machine of Example 1 of the utility model (the overflow seat mounting structure is in a disassembled state);

[0023] Figure 4 It is a vertical cross-sectional view of the overflow seat of the cleaning machine of Example 1 of the utility model;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the overflow seat installation structure of Example 1 of the utility model;

[0025] Figure 6 This is an exploded view of the overflow seat installation structure of Example 1 of the utility model;

[0026] Figure 7It is a schematic diagram of the three-dimensional structure of the overflow seat of Example 1 of the utility model;

[0027] Figure 8 It is a three-dimensional structural schematic diagram of the overflow seat installation structure of Example 2 of the utility model;

[0028] Fig. 9 It is a three-dimensional structural schematic diagram of the overflow seat installation structure of Example 3 of the utility model;

[0029] Fig.10 It is a three-dimensional structural schematic diagram of the overflow seat installation structure of Example 4 of the utility model;

[0030] Fig.11 It is a cross-sectional view of the overflow seat installation structure of Example 4 of the utility model. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0033] Example 1

[0034] Figure 1-Figure 7 A preferred embodiment of the cleaning machine of the utility model is shown. A cleaning machine comprises a box 10 having a washing chamber 100, a spray arm rotatably arranged in the washing chamber 100, and an overflow seat 20 arranged on the outer side wall of the box 10. A pumping mechanism for pumping water from the bottom of the box 10 to the spray arm is also provided at the bottom of the box 10. The pumping mechanism and the spray arm are the same as those of the applicant's prior application 201320889945.4, and are not described in detail here.

[0035] See also Figure 3 The side wall of the box body 10 is provided with an installation opening 11 which is connected with the washing chamber 100. The overflow seat 20 is installed on the outer side wall of the box body 10 and covers the installation opening 11 on the side wall of the box body 10. The overflow seat 20 defines an overflow chamber 200 with an open opening, a water inlet channel 210 and an overflow channel 220.

[0036] A mounting plate 30 covering the mounting opening 11 is provided on the inner side wall of the box body 10. The mounting plate 30 can be connected to the overflow seat 20, so that the overflow seat 20 is locked and connected to the side wall of the box body 10. Specifically, the overall size of the mounting plate 30 is slightly larger than the mounting opening 11, wherein the outer peripheral edge of the mounting plate 30 can be limited inside the outer peripheral edge of the mounting opening 11 of the box body 10. The overflow chamber 200 has a rear wall opposite to its opening, two side walls opposite to the left and right, and a top and bottom wall opposite to the top and bottom. The rear wall of the overflow chamber 200 has a support column 23 extending forward, and the support column 23 has two support columns 23 arranged at intervals on the left and right. The local outward deformation of the mounting plate 30 protrudes through the mounting opening 11 and abuts against the ends of the two support columns 23 of the overflow seat 20. A connecting hole 300 is opened at a position opposite to the two support columns 23 on the mounting plate 30, and a screw passes through the above-mentioned connecting hole 300 and is connected to the ends of the support columns 23. After the screws are locked in place, the outer edge of the mounting plate 30 abuts against the inner side of the outer edge of the mounting opening 11 of the box body 10, and the main body of the overflow seat 20 abuts against the inner side of the outer edge of the mounting opening 11 of the box body 10. After the overflow seat 20 is installed in place, the opening of the overflow chamber 200 is opposite to the mounting opening 11 on the side wall of the box body 10, and a sealing ring 24 is provided between the outer periphery of the opening of the overflow seat 20 and the outer periphery of the mounting opening 11 on the side wall of the box body 10 to seal the two. The sealing ring 24 can prevent water from leaking or seeping from the gap between the overflow seat 20 and the side wall of the box body 10, thereby ensuring the sealing effect. In order to prevent the installation of the mounting plate 30 from affecting the overflow process, an opening 31 opposite to the opening of the overflow chamber 200 is provided in the middle of the mounting plate 30, and the water in the washing chamber 100 can enter the overflow chamber 200 of the overflow seat 20 through the opening 31 of the mounting plate 30.

[0037] The main body of the overflow seat 20 also has a water inlet pipe 21 extending vertically and an overflow pipe 22 in an inverted L-shaped structure. The water inlet pipe 21 and the overflow pipe 22 are designed as an integral body with the main body of the overflow seat 20. The water inlet pipe 21 can be used to be connected to an external water supply pipe. The overflow pipe 22 can be used to be connected to an external wastewater discharge pipeline. More specifically, in order to further rationally utilize the space in the overflow chamber of the overflow seat 20 and make the overall volume of the overflow seat 20 more compact, the overflow seat 20 is a flat structure as a whole, and the L-shaped overflow pipe 22 is located on the right side of the main body of the overflow seat 20. The end of the transverse part of the L-shaped overflow pipe 22 passes through the right side wall of the overflow chamber, that is, an overflow port 221 for the water supply flow to enter the overflow pipe 22 is opened on the right side wall of the overflow chamber. When the cleaning machine is working normally, the water sprayed by the spray arm may splash into the overflow chamber of the overflow seat 20. In order to prevent the water from flowing away from the overflow port 221 and thus affecting the cleaning degree, the overflow seat 20 of this embodiment adopts a design of raising the overflow surface of the overflow port 221 (that is, the plane where the lowest position of the overflow port 221 is located). Specifically, Figure 4As shown, the overflow port 221 is located higher than the bottom wall of the overflow chamber 200, and the distance between the lowest position of the overflow port 221 and the bottom wall of the overflow chamber is recorded as the second distance.

[0038] A downwardly arched enclosure 212 is provided on the top wall of the overflow chamber 200. The enclosure 212 extends in the front-to-back direction, and the front end portion extends forward to the position of the mounting port 11 of the housing 10, and forms a water inlet 211 connected to the washing chamber 100 in the area defined by the outer peripheral edge of the mounting port 11. The water inlet pipe 21 extends vertically, specifically, from the bottom of the overflow seat 20 into the overflow chamber 200, and the top of the water inlet pipe 21 is connected to the enclosure 212, and a water outlet 2120 is correspondingly provided on the enclosure 212 at a position connected to the upper end of the water inlet pipe 21, thereby, the inner cavity of the water inlet pipe 21 and a section enclosed between the enclosure 212 and the top wall of the overflow chamber 200 together constitute the water inlet channel 210 of the overflow seat 20. By offsetting the overflow pipe 22 to the side of the overflow seat 20 body and vertically passing the water inlet pipe 21 into the overflow cavity, the overflow seat 20 can be effectively prevented from excessively protruding outward from the side wall of the box body 10 and occupying the installation space, making the overflow seat 20 more compact as a whole.

[0039] pass Figure 7 It can be seen that the position of the water inlet 211 of the water inlet channel 210 is higher than the position of the overflow port 221 of the overflow channel 220. Considering the amount of water in the washing chamber 100 and the amount of overflow, the distance between the water inlet 211 of the water inlet channel 210 and the overflow port 221 of the overflow channel 220 needs to be reasonably designed, so as to ensure that the overflowing water in the washing chamber does not contact and pollute the water source of the water inlet. The vertical distance between the lowest position of the water inlet 211 of the water inlet channel 210 and the lowest position of the overflow port 221 of the overflow channel 220 is recorded as the first distance L1, and the value range of the first distance L1 is: 2.5cm-5.5cm. The structural design that the water inlet 211 of the water inlet channel 210 is higher than the overflow port 221 of the overflow channel 220 can achieve the purpose of cutting off the connection between the washing chamber 100 of the cleaning machine and the water inlet channel 210, effectively avoiding the contact and contamination of the overflow water in the washing chamber with the water source, and ensuring the cleanliness of the washing chamber 100.

[0040] In order to prevent the water flow of the washing chamber 100 from splashing into the overflow chamber 200 during the normal operation of the cleaning machine, a blocking cover 40 is also connected to the mounting plate 30, and the blocking cover 40 blocks the open front side of the overflow chamber 200. The blocking cover 40 is square, and each of its four corners has a plug 41 extending outward. Each plug 41 has a limit stop 411 and a limit protrusion 412 arranged in sequence along its length direction. The limit stop 411 is relatively close to the main body of the blocking cover 40, and the limit protrusion 412 is far away from the main body of the blocking cover 40. The mounting plate 30 is correspondingly provided with a slot 32 for the plug 41 to be inserted therein, and the slot 32 is a strip groove adapted to the plug 41. The limit protrusion 412 on the plug 41 is an arc-shaped protrusion protruding outward relative to the wall surface of the plug 41. The arc-shaped protrusion can pass through the slot 32 of the mounting plate 30 and extend into the overflow chamber 200 of the overflow seat 20. When the blocking cover 40 is assembled on the mounting plate 30, the blocking cover 40 covers the front side of the opening 31 of the mounting plate 30, the limiting protrusion 412 on the insert 41 is limited to the side of the outer peripheral edge of the slot 32 on the mounting plate 30 facing the overflow chamber 200, and the limiting stopper 411 of the insert 41 is correspondingly limited to the side of the outer peripheral edge of the slot 32 on the mounting plate 30 away from the overflow chamber 200. The limiting stopper 411 of the insert 41 is at a certain distance from the main body of the blocking cover 40, so that the four peripheral edges of the blocking cover 40 and the main body of the mounting plate 30 reserve space for the water flow in the washing chamber 100 to enter the water-passing gap 50 in the overflow chamber 200. By arranging the blocking cover at the side wall mounting opening of the box body, it is not easy for food residues to enter the overflow chamber and block the overflow port during the operation of the washing machine, which effectively reduces the risk of food residues remaining in the overflow port of the washing machine, ensuring the normal operation of the washing machine and the hygienic safety of tableware washing. On the other hand, the setting of the cover is coordinated with the overall appearance of the inner wall of the cleaning machine box, which can cover the exposed opening and make the appearance of the cleaning machine more neat and unified, which not only enhances the visual beauty of the cleaning machine, but also improves the overall product texture.

[0041] The lower end of the vertical part of the L-shaped overflow pipe 22 of the overflow seat is connected to a drain pipe 60, and a one-way valve (not shown) is also provided on the drain pipe 60 to prevent the overflowed water from flowing back. The drain pipe 60 can be connected to an external sewer pipe. The drain pipe 60 of this embodiment is vertically extended as a whole, and the main body of the drain pipe 60 is also connected to an exhaust branch pipe 604 extending obliquely upward, and the top port of the exhaust branch pipe is an outlet 60a for exhaust. If the sewer pipe is blocked or the valve on the pipe fails to open, the water or odor that cannot be discharged in time in the drain pipe 60 will emerge from the outlet 60a, and will not flow back into the inner cavity of the cleaning machine, thereby ensuring the cleanliness of the inner cavity of the cleaning machine. In addition, it is easier for the user to identify whether the drain pipe 60 is blocked in time and to inspect or dredge the pipe. In order to facilitate connection with other drainage pipes 60 (such as the drain pipe of a conventional sink), the drainage pipe 60 of this embodiment is further provided with a connecting branch pipe 66, which also extends obliquely upward.

[0042] Example 2

[0043] Figure 8 Another preferred embodiment of the cleaning machine of the utility model is shown. The difference between this embodiment and embodiment 1 is that the structure of the drain pipe 60 connected to the overflow pipe 22 is different. Specifically, the drain pipe 60 of this embodiment includes an upper pipe 601 and a lower pipe 602 arranged in sequence from top to bottom. The upper end of the lower pipe 602 is a cone tube structure with a gradually increasing diameter from bottom to top. The diameter of the pipe opening of the upper pipe 601 is smaller than the diameter of the top opening 31 of the cone tube structure. In addition, the lower end of the lower pipe 602 is connected to the outer peripheral edge of the cone tube structure through a connecting rib 603. Therefore, the upper end of the cone tube structure is the outlet 60a for the odor to be discharged upward.

[0044] Example 3

[0045] Fig. 9 Another preferred embodiment of the cleaning machine of the utility model is shown. The difference between this embodiment and embodiment 1 is that the structure of the drain pipe 60 connected to the overflow pipe 22 is different. Specifically, the drain pipe 60 includes a first pipe 61 and a second pipe 62, which are both vertically arranged and staggered in the up and down directions. The bottom of the first pipe 61 is connected to the second pipe 62 through a horizontally extending transverse pipe 63, wherein the transverse pipe 63 can be horizontally extended or slightly inclined downward relative to the horizontal plane. The top port of the second pipe 62 is higher than the transverse pipe 63, that is, the position where the transverse pipe 63 connects to the second pipe 62 is lower than the top port of the second pipe 62, and the top port of the second pipe 62 is the air outlet 60a for the discharge of odor.

[0046] Example 3

[0047] Fig.10 and Fig.11Another preferred embodiment of the cleaning machine of the utility model is shown. The difference between this embodiment and embodiment 1 is that the structure of the drain pipe 60 connected to the overflow pipe 22 is different. Specifically, the drain pipe 60 includes a first pipe 61 and a second pipe 62, which are both vertically arranged and staggered in the up-down direction, wherein the bottom of the first pipe 61 is connected to the upper part of the second pipe 62 through a first inclined pipe 64 extending obliquely upward, and the bottom of the first pipe 61 is also connected to the lower part of the second pipe 62 through a second inclined pipe 65 extending obliquely downward, and the top port of the second pipe 62 is higher than the first inclined pipe 64, that is, the position where the second inclined pipe 65 connects to the second pipe 62 is lower than the top port of the second pipe 62, and the top port of the second pipe 62 is the outlet 60a for the discharge of odor.

Claims

1. A cleaning machine, comprising: A box body (10) having a washing chamber (100), wherein a mounting opening (11) which is in communication with the washing chamber (100) is provided on a side wall of the box body (10); An overflow seat (20) is mounted on the outer side wall of the box body (10) and covers the mounting opening (11) on the side wall of the box body (10); an overflow chamber (200) with an open opening and an overflow channel (220) are defined in the overflow seat (20); the open opening of the overflow chamber (200) is opposite to the mounting opening (11) on the side wall of the box body (10); the overflow channel (220) has an overflow port (221) connected to the overflow chamber (200) for discharging water in the washing chamber (100); and the overflow channel (220) is characterized in that it also includes a drain pipe (60) connected to the outlet position of the overflow channel (220); the drain pipe (60) is provided with an outlet port (60a) for discharging gas to the outside.

2. The cleaning machine according to claim 1, characterized in that: The drainage pipe (60) extends vertically as a whole, and the main body of the drainage pipe (60) is also connected to an exhaust branch pipe (604) extending obliquely upward, and the top port of the exhaust branch pipe (604) is the exhaust port (60a).

3. The cleaning machine according to claim 1, characterized in that: The drainage pipe (60) comprises an upper pipe (601) and a lower pipe (602) which are arranged in sequence from top to bottom. The upper end of the lower pipe (602) is a tapered tube structure with a diameter gradually increasing from bottom to top. The lower end of the lower pipe (602) is connected to the outer peripheral edge of the tapered tube structure via a connecting rib (603). The upper end of the tapered tube structure is the air outlet (60a).

4. The cleaning machine according to claim 1, characterized in that: The drainage pipe (60) comprises a first pipe (61) and a second pipe (62) which are both arranged vertically and staggered in the up-down direction; the bottom of the first pipe (61) is connected to the second pipe (62) via a horizontally extending transverse pipe (63); the top port of the second pipe (62) is higher than the transverse pipe (63), thereby forming the air outlet (60a).

5. The cleaning machine according to claim 1, characterized in that: The drainage pipe (60) comprises a first pipe (61) and a second pipe (62) which are both arranged vertically and staggered in the up-down direction; the bottom of the first pipe (61) is connected to the upper part of the second pipe (62) via a first inclined pipe (64) extending obliquely upward; the bottom of the first pipe (61) is also connected to the lower part of the second pipe (62) via a second inclined pipe (65) extending obliquely downward; the top port of the second pipe (62) is higher than the first inclined pipe (64), thereby forming the air outlet (60a).

6. The cleaning machine according to any one of claims 1 to 5, characterized in that: The drainage pipe (60) is also provided with a connecting branch pipe (66).

7. The cleaning machine according to any one of claims 1 to 5, characterized in that: The overflow seat (20) also has an overflow pipe (22) on its main body. The overflow pipe (22) is formed into an inverted L-shaped structure. The end of the transverse portion of the L-shaped overflow pipe (22) is connected to the overflow port (221). The inner cavity of the overflow pipe (22) constitutes the overflow channel (220).

8. The cleaning machine according to claim 7, characterized in that: The drainage pipe (60) is connected to the lower end of the vertical portion of the L-shaped overflow pipe (22).

9. The cleaning machine according to claim 7, characterized in that: The overflow port (221) is located at a position higher than the bottom wall of the overflow chamber (200).

10. The cleaning machine according to any one of claims 1 to 5, characterized in that: The drainage pipe (60) is also provided with a one-way valve for allowing water to pass in one direction.

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