Drain valve and cleaning machine

Abstract

The invention belongs to the technical field of cleaning machines, and discloses a drain valve and a cleaning machine. The drainage valve comprises a shell, a valve element assembly and a driving assembly, an inlet-outlet is formed in the side face of the shell and used for being communicated with the water tank, a water outlet is formed in the bottom of the shell, and the shell is further provided with a water inlet communicated with an external water inlet pipeline. The valve element assembly is in sealed pivot joint with the shell and is provided with a first position for blocking the water outlet and a second position for opening the water outlet. The driving assembly is installed outside the shell, the valve element assembly is connected to the output end of the driving assembly, and the driving assembly can drive the valve element assembly to rotate relative to the shell so that the valve element assembly can be switched between the first position and the second position. According to the drain valve and the cleaning machine, the situation that water is stored in the drain valve can be eradicated.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning machines, and in particular to a drain valve and a cleaning machine. Background Art

[0002] Kitchen washing machines include dishwashers, fruit and vegetable washing machines, etc. By integrating the fruit and vegetable washing machine into the dishwasher, it is possible to automatically wash tableware (bowls, plates, etc.), vegetables and fruits. When using the washing machine, you only need to put the tableware or food into the sink inside the washing machine and start the washing machine, realizing multiple uses of one machine.

[0003] Take the fruit and vegetable machine as an example. When the machine is filled with water, the liquid enters the machine through the drain valve. In order to ensure that there is water inside the machine, the middle of the drain pipe is generally raised to the same height as the machine during design. After cleaning, the drain motor works to drain the water from the machine from the drain pipe. Since part of the drain pipe is raised, when the drain motor is not working, a small amount of water will inevitably flow back to the drain valve, thus forming residual water. In addition, due to other reasons such as the user draining water, the later external water will also remain at the bottom of the machine basin for a long time. When the machine is not used for a long time, the accumulated water will produce odor and bacterial growth.

[0004] Therefore, it is urgent to design a drain valve and a cleaning machine to solve the above problems. Summary of the invention

[0005] An object of the present invention is to provide a drain valve that can prevent water from accumulating in the drain valve.

[0006] Another object of the present invention is to provide a cleaning machine that will not accumulate water when used for a long time, thereby avoiding the generation of odor and the breeding of bacteria and improving the user experience.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Drain valve, including:

[0009] A shell, wherein an inlet and an outlet are provided on the side of the shell, and the inlet and an outlet are used to communicate with the water tank. A water outlet is provided at the bottom of the shell, and the shell also has a water inlet, and the water inlet is communicated with an external water inlet pipeline;

[0010] A valve core assembly is pivotally connected to the housing in a sealing manner, and the valve core assembly has a first position for blocking the water outlet and a second position for opening the water outlet;

[0011] The drive assembly is installed outside the shell, the valve core assembly is connected to the output end of the drive assembly, and the drive assembly can drive the valve core assembly to rotate relative to the shell so that the valve core assembly switches between the first position and the second position.

[0012] As an optional solution, the valve core assembly includes:

[0013] A coupling shaft, one end of which is connected to the output end of the driving assembly, the coupling shaft seal is pivotally connected to the housing and is arranged offset from the center line of the water outlet, and the coupling shaft is located above the water outlet;

[0014] A connecting member, a first end of which is connected to the other end of the connecting shaft;

[0015] The water seal is connected to the second end of the connecting member. When in the first position, the second end is located below the first end and close to the center line of the water outlet.

[0016] As an optional solution, the first end is provided with a plug-in hole, the connecting shaft is plugged into the plug-in hole, and the locking member passes through the first end and the connecting shaft and is threadedly connected to the first end and the connecting shaft respectively.

[0017] As an optional solution, it also includes a switch assembly, which is installed on the housing and located beside the connecting shaft. The connecting shaft is convexly provided with a protrusion, which can rotate and trigger the switch assembly. The switch assembly is communicatively connected with the drive assembly.

[0018] As an optional solution, the drain valve further includes a drain motor, which is installed on the housing and located below the water outlet, and the water outlet end of the drain motor is connected to a drain pipe.

[0019] As an optional solution, a check valve is provided in the drain joint, and the check valve is configured to allow liquid to flow from the shell to the drain pipe and prevent liquid from flowing from the drain pipe to the shell.

[0020] As an optional solution, an overflow port is provided on the side wall of the shell, the overflow port is connected to an overflow pipe, a portion of the overflow pipe has a height flush with the top of the sink, and one end of the overflow pipe away from the overflow port is connected to the drain pipe.

[0021] As an optional solution, the housing includes:

[0022] A shell, the inlet and outlet as well as the water outlet are all provided in the shell, the drive assembly is mounted on the outer wall of the shell, and the valve core assembly is rotatably connected to the shell;

[0023] The upper cover is detachably connected to the top of the shell body, and the water inlet is arranged on the upper cover.

[0024] As an optional solution, the shell and the upper cover are connected by snap fasteners.

[0025] The cleaning machine comprises a water tank, a drain seat and the above-mentioned drain valve, one end of the above-mentioned drain seat is connected with the above-mentioned water tank, and the other end of the above-mentioned drain seat is connected with the above-mentioned inlet and outlet.

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides a drain valve, which opens a water outlet at the bottom of a shell. When the sink needs to be cleaned, a driving component drives a valve core component to a first position. Due to the effect of external water pressure, the sink is filled with water to clean the items in the sink. When the sink needs to be drained after cleaning, the driving component drives the valve core component to a second position. The water in the sink flows into the shell from the inlet and outlet and flows out from the water outlet. Liquid will not remain in the drain valve. Long-term use will not cause problems such as bacterial growth in the drain valve. The driving component drives the valve core component to rotate in a rotational manner to realize the switching of the valve core component between the first position and the second position. Different from the conventional linear drive method, which requires the coordinated use of a connecting rod and other mechanisms, the rotary drive method has a streamlined driving structure, fewer parts, and is easy to assemble. The probability of parts being damaged during long-term use is even lower.

[0028] The present invention also provides a cleaning machine, comprising a water tank, a drain seat and the above-mentioned drain valve, wherein one end of the drain seat is connected to the water tank, and the other end of the drain seat is connected to the inlet and outlet. The above-mentioned cleaning machine adopts the above-mentioned drain valve, and the drain valve is used for a long time without water accumulation inside, thus avoiding the generation of odor and the breeding of bacteria, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a first structural schematic diagram of a cleaning machine provided by an embodiment of the present invention;

[0030] Figure 2 is a second structural schematic diagram of a cleaning machine provided by an embodiment of the present invention;

[0031] Figure 3 is a cross-sectional view of a drain valve when the valve core assembly provided by an embodiment of the present invention is in the first position;

[0032] Figure 4 is a cross-sectional view of the drain valve when the valve core assembly provided by an embodiment of the present invention is in the second position;

[0033] Figure 5 It is a schematic structural diagram of a drain valve, a drain seat, an overflow pipe and a drain pipe provided by an embodiment of the present invention;

[0034] Figure 6 is an exploded view of a drain valve provided by an embodiment of the present invention;

[0035] Figure 7 is a structural schematic diagram of a valve core assembly provided by an embodiment of the present invention;

[0036] Figure 8 is an exploded view of a water seal and a connecting member provided in an embodiment of the present invention;

[0037] Fig. 9 It is a side view of a drain valve provided in an embodiment of the present invention.

[0038] In the figure:

[0039] 100. Drain valve;

[0040] 10. Shell; 11. Shell; 111. Inlet and outlet; 112. Water outlet; 113. Overflow; 114. Coupling installation position; 115. Mounting parts; 12. Upper cover; 121. Water inlet;

[0041] 20. valve core assembly; 21. connecting shaft; 211. protrusion; 22. connecting piece; 221. first end; 2211. plug hole; 222. second end; 23. water seal; 24. locking piece; 25. sealing ring;

[0042] 30. driving assembly; 31. driving member; 32. mounting flange;

[0043] 40. switch assembly; 41. switch body; 42. trigger unit; 50. drainage motor;

[0044] 1. Sink; 2. Drain pipe; 3. Check valve; 4. Overflow pipe; 5. Drain seat. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] This embodiment proposes a cleaning machine, which can be a dishwasher for kitchen use, and the dishwasher is integrated with functional modules such as a fruit and vegetable machine. Of course, the cleaning machine can also be other cleaning equipment, which is not specifically limited here.

[0050] like Figure 1 and Figure 2 As shown, the cleaning machine includes a water tank 1, a drain seat 5 and a drain valve 100. One end of the drain seat 5 is connected to the bottom of the water tank 1, and the other end of the drain seat 5 is installed with the drain valve 100. That is, the drain seat 5 has a flow channel for water to pass through.

[0051] In the prior art, taking the fruit and vegetable machine as an example, when the fruit and vegetable machine is filled with water, the liquid enters the fruit and vegetable machine through the drain valve. In order to ensure that water is stored inside the fruit and vegetable machine, the middle part of the drain pipe is generally raised to the same height as the fruit and vegetable machine during design. After cleaning, the drain motor works to discharge the water from the fruit and vegetable machine from the drain pipe. Since part of the drain pipe is raised, when the drain motor is not working, a small amount of water will inevitably flow back to the drain valve, thereby forming residual water. In addition, due to other reasons such as the user draining, the later external water will also remain at the bottom of the machine basin for a long time. When the machine is not used for a long time, the stored water will produce problems such as odor and bacterial growth.

[0052] In order to solve the above problems, this embodiment provides a drain valve 100, which can prevent water from being stored in the drain valve 100. Figure 3-Figure 6As shown, the drain valve 100 includes a shell 10, a valve core assembly 20 and a drive assembly 30. An inlet and outlet 111 is provided on the side of the shell 10. The inlet and outlet 111 is used to communicate with the sink 1 (the inlet and outlet 111 is connected with the sink 1 through the drain seat 5 mentioned above). A water outlet 112 is provided at the bottom of the shell 10. The shell 10 also has a water inlet 121, which is connected to an external water inlet pipeline. The valve core assembly 20 is sealed and pivotally connected to the shell 10. The valve core assembly 20 has a first position that blocks the water outlet 112 and a second position that opens the water outlet 112. The drive assembly 30 is installed on the outside of the shell 10. The valve core assembly 20 is connected to the output end of the drive assembly 30. The drive assembly 30 can drive the valve core assembly 20 to rotate relative to the shell 10 to switch the valve core assembly 20 between the first position and the second position.

[0053] The drain valve 100 has a water outlet 112 at the bottom of the housing 10. When the water tank 1 needs to be cleaned, the driving assembly 30 drives the valve core assembly 20 to the first position (i.e. Figure 3 Due to the external water pressure, the water tank 1 is filled with water to clean the items in the water tank 1. When the water tank 1 needs to be drained after cleaning, the driving component 30 drives the valve core component 20 to the second position (i.e. Figure 4 The water in the water tank 1 flows into the housing 10 from the inlet and outlet 111 and flows out from the outlet 112. The liquid will not remain in the drain valve 100. Long-term use will not cause problems such as bacteria growth in the drain valve 100. The driving assembly 30 drives the valve core assembly 20 to rotate in a rotational manner to realize the switching of the valve core assembly 20 between the first position and the second position. Different from the conventional linear driving method, which requires the use of a connecting rod and other mechanisms, the rotary driving method has a streamlined driving structure, fewer parts, and is easy to assemble. The probability of parts being damaged during long-term use is lower.

[0054] Alternatively, if Figure 6 As shown, the housing 10 includes a housing 11 and an upper cover 12, an inlet and outlet 111 and a water outlet 112 are both provided in the housing 11, a driving assembly 30 is mounted on the outer wall of the housing 11, and a valve core assembly 20 is rotatably connected to the housing 11; the upper cover 12 is detachably connected to the top of the housing 11, and the water inlet 121 is provided on the upper cover 12. Through the above arrangement, the upper cover 12 can be conveniently removed from the housing 11, and the valve core assembly 20 inside the housing 11 can then be repaired or replaced.

[0055] Optionally, the housing 11 and the upper cover 12 are connected by snapping. Further, the upper cover 12 is first buckled on the top of the housing 11, and the snap-fitting protrusion 211 on the housing 11 is screwed into the slot of the upper cover 12 by screwing. In other embodiments, the snap-fitting protrusion 211 and the slot on the top of the housing 11 can achieve the same snap-fitting effect, which is not limited here.

[0056] Alternatively, if Figure 5 and Figure 6 As shown, the drive assembly 30 is a small rotary drive motor suitable for use in a narrow installation space of household appliances. Optionally, the drive assembly 30 includes a drive member 31 and two mounting flanges 32, the output end of the drive member 31 is connected to the valve core assembly 20, the two mounting flanges 32 are convexly arranged on the peripheral wall of the drive member 31 and are spaced along the outer periphery of the drive member 31, and two mounting members 115 are convexly arranged on the outer side of the peripheral wall of the housing 11, and the two mounting members 115 are arranged one-to-one with the two mounting flanges 32, and each mounting flange 32 is locked with the mounting member 115 by a fixing member. Optionally, the fixing member is a screw. Through the above arrangement, the drive assembly 30 can be quickly installed outside the housing 11.

[0057] Alternatively, see Figure 3 , Figure 4 as well as Figure 6-Figure 8 The valve core assembly 20 includes a connecting shaft 21, a connecting member 22 and a water seal 23. One end of the connecting shaft 21 is connected to the output end of the driving assembly 30. The connecting shaft 21 is sealed and pivoted to the housing 10 and is set away from the center line of the water outlet 112. The connecting shaft 21 is located above the water outlet 112; the first end 221 of the connecting member 22 is connected to the other end of the connecting shaft 21; the water seal 23 is connected to the second end 222 of the connecting member 22. When in the first position, the second end 222 is located below the first end 221 and is close to the center line of the water outlet 112. Through the above-mentioned arrangement, the connecting shaft 21 is arranged at a position deviated from the center of the water outlet 112, and the arrangement of the connecting member 22 ensures that when in the second position, the water seal 23 can be just buckled at the water outlet 112. At the same time, the eccentric arrangement of the connecting shaft 21 relative to the water outlet 112 ensures that when switching from the second position to the first position, the side of the water seal 23 that first contacts the side wall of the water outlet 112 can contact smoothly with the side wall of the water outlet 112, thereby preventing the edge of the water seal 23 from being scratched by the side wall of the water outlet 112 and tilting up during the rotation of the water seal 23, resulting in an inadequate seal.

[0058] Furthermore, the edge of the water seal 23 is configured to be tilted in the direction of the connecting member 22, and the side wall of the water outlet 112 is configured to be narrowed inward from top to bottom. This configuration further ensures that when the water seal 23 just contacts the side wall of the water outlet 112, the angle is obtuse. During the process of continued rotation of the water seal 23, the water seal 23 will not be rubbed by the side wall of the water outlet 112 to form wrinkles.

[0059] Alternatively, if Figure 4 and Figure 7As shown, the connecting member 22 is bent as a whole, and the second end 222 is disc-shaped. Through the above arrangement, the connection between the second end 222 and the connecting member 22 is roughly vertically arranged, and the force on the second end 222 is more balanced. In other embodiments, the connecting member 22 can also be inclined, which is not limited here.

[0060] Optionally, the water seal 23 is an elastic member, and the water seal 23 can be sleeved on the second end 222 by deformation.

[0061] In addition, the above arrangement occupies less space in the relatively narrow space within the shell 11 . Compared with the straight-up and straight-down driving method of the connecting rod, it can provide more space for the liquid inside the shell 11 to flow out, thereby ensuring the smoothness of the liquid inflow and outflow in the shell 11 .

[0062] Alternatively, see Figure 7 and Figure 8 The first end 221 has a plug hole 2211, the connecting shaft 21 is plugged into the plug hole 2211, and the locking member 24 passes through the first end 221 and the connecting shaft 21 and is respectively threadedly connected to the first end 221 and the connecting shaft 21. Through the above arrangement, the fixed connection between the connecting member 22 and the connecting shaft 21 is achieved.

[0063] Alternatively, if Figure 6 As shown, a coupling installation position 114 is provided on the side wall of the shell 11 . Specifically, the coupling installation position 114 is a through hole for installing the coupling 21 . The coupling 21 is inserted into the coupling installation position 114 . Part of the coupling 21 is located inside the shell 11 , and the other part is located outside the shell 11 .

[0064] Alternatively, if Figure 6 and Figure 7 As shown, a sealing ring 25 is sleeved on the coupling 21 . After the coupling 21 is inserted into the coupling installation position 114 , the sealing ring 25 plays a role of sealing with the housing 11 .

[0065] Alternatively, if Figure 7 and Fig. 9 As shown, the drain valve 100 further includes a switch assembly 40, which is mounted on the housing 10 and located beside the coupling 21. The coupling 21 is provided with a protrusion 211 (specifically, the portion of the coupling 21 located outside the housing 11 is provided with the protrusion 211), and the protrusion 211 can rotate and trigger the switch assembly 40, and the switch assembly 40 drives the assembly 30 to communicate. Through the above arrangement, when the water outlet 112 needs to be closed, the drive assembly 30 drives the coupling 21 and drives the water seal 23 to rotate gradually close to the water outlet 112, and when the protrusion 211 triggers the switch assembly 40, the drive assembly 30 stops driving.

[0066] Optionally, the switch assembly 40 includes a switch body 41 and a trigger portion 42 . The trigger portion 42 is movably mounted on the switch body 41 , and the protrusion 211 can contact the trigger portion 42 to trigger the switch body 41 .

[0067] The communication connection between the switch assembly 40 and the drive assembly 30 is realized through a control system, which is a prior art and will not be described in detail here.

[0068] It should be noted that a start-up button is also provided on the fruit and vegetable machine or cleaning machine to control the drive assembly 30 to start rotating the valve core assembly 20 to the first position. When cleaning is completed, the program controls the drive assembly 30 to rotate the valve core assembly 20 to the second position to start draining water. The drive assembly 30 itself has an extreme rotation position. When the valve core assembly 20 is opened to the maximum angle, the drive assembly 30 stops rotating.

[0069] Alternatively, if Figure 5 As shown, the drain valve 100 further includes a drain motor 50, which is mounted on the housing 10 and located below the water outlet 112, and the water outlet end of the drain motor 50 is connected to the drain pipe 2. Through the above arrangement, the drain motor 50 can accelerate the speed at which the liquid flows to the drain pipe 2 to the outside, further ensuring that there is no liquid residue in the housing 10.

[0070] Alternatively, if Figure 6 As shown, a check valve 3 is provided in the drainage joint, and the check valve 3 is configured to allow liquid to flow from the housing 10 to the drainage pipe 2 and prevent liquid from flowing from the drainage pipe 2 to the housing 10. This arrangement prevents sewage in the drainage pipe 2 from flowing back into the housing 10.

[0071] Alternatively, if Figure 5 As shown, the drain valve 100 has the functions of water replenishment, drainage and overflow. Specifically, the side wall of the shell 10 is provided with an overflow port 113, which is connected to the overflow pipe 4. The height of part of the overflow pipe 4 is level with the top height of the water tank 1. The end of the overflow pipe 4 away from the overflow port 113 is connected to the drain pipe 2. When the water seal 23 blocks the water outlet 112 in the first position, the water inlet 121 supplies water to the water tank 1 through the drain valve 100 and the lower water seat 5. When the cleaning machine completes cleaning, the water seal 23 switches to the second position to open the water outlet 112 (at this time, the water supply pipeline is closed), and the water in the water tank 1 flows into the lower water seat 5 and the shell 11 in turn under the action of gravity, and then is completely discharged through the water outlet 112. In addition, when the water supply of the water inlet 121 is abnormal and causes the water in the water tank 1 to overflow the water tank 1, the water in the water tank 1 can be discharged through the overflow port 113 and the overflow pipe 4 first, avoiding overflow of the water tank 1 and improving the safety of the cleaning machine.

[0072] This embodiment also provides a cleaning machine, which includes a water tank 1, a drain seat 5 and the drain valve 100, wherein one end of the drain seat 5 is connected to the water tank 1, and the other end of the drain seat 5 is connected to the inlet and outlet 111. The cleaning machine adopts the drain valve 100, and the drain valve 100 is used for a long time without water accumulation inside, thereby avoiding the generation of odor and the breeding of bacteria, and improving the user experience.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Drain valve, characterized in that: include: A housing (10), wherein an inlet and outlet (111) is provided on a side of the housing (10), the inlet and outlet (111) being used to communicate with the water tank (1), a water outlet (112) is provided on the bottom of the housing (10), and the housing (10) further comprises a water inlet (121), the water inlet (121) being communicated with an external water inlet pipeline; A valve core assembly (20) is pivotally connected to the housing (10) in a sealed manner, and the valve core assembly (20) has a first position for blocking the water outlet (112) and a second position for opening the water outlet (112); A drive assembly (30) is installed outside the housing (10), and the valve core assembly (20) is connected to an output end of the drive assembly (30). The drive assembly (30) can drive the valve core assembly (20) to rotate relative to the housing (10) so that the valve core assembly (20) switches between the first position and the second position.

2. The drain valve according to claim 1, characterized in that: The valve core assembly (20) comprises: A connecting shaft (21), one end of which is connected to the output end of the driving assembly (30); the connecting shaft (21) is sealed and pivotally connected to the housing (10) and is arranged offset from the center line of the water outlet (112); and the connecting shaft (21) is located above the water outlet (112); A connecting member (22), the first end (221) of which is connected to the other end of the connecting shaft (21); The water seal (23) is connected to the second end (222) of the connecting member (22); when in the first position, the second end (222) is located below the first end (221) and is disposed close to the center line of the water outlet (112).

3. The drain valve according to claim 2, characterized in that: The first end (221) is provided with an inserting hole (2211), the connecting shaft (21) is inserted into the inserting hole (2211), and the locking member (24) passes through the first end (221) and the connecting shaft (21) and is respectively threadedly connected to the first end (221) and the connecting shaft (21).

4. The drain valve according to claim 2, characterized in that: The invention also comprises a switch assembly (40), wherein the switch assembly (40) is mounted on the housing (10) and is located beside the connecting shaft (21), the connecting shaft (21) is provided with a protrusion (211), the protrusion (211) can rotate and trigger the switch assembly (40), and the switch assembly (40) is communicatively connected to the driving assembly (30).

5. The drain valve according to any one of claims 1 to 4, characterized in that: The drain valve further comprises a drain motor (50), wherein the drain motor (50) is mounted on the housing (10) and is located below the water outlet (112), and the water outlet end of the drain motor (50) is connected to the drain pipe (2).

6. The drain valve according to claim 5, characterized in that: A check valve (3) is arranged in the drainage joint, and the check valve (3) is configured to allow liquid to flow from the housing (10) to the drainage pipe (2) and to prevent liquid from flowing from the drainage pipe (2) to the housing (10).

7. The drain valve according to claim 6, characterized in that: The side wall of the shell (10) is provided with an overflow port (113), the overflow port (113) is connected to an overflow pipe (4), a portion of the overflow pipe (4) is at the same height as the top of the water tank (1), and an end of the overflow pipe (4) facing away from the overflow port (113) is connected to the drain pipe (2).

8. The drain valve according to any one of claims 1 to 4, characterized in that: The housing (10) comprises: A housing (11), the inlet and outlet (111) and the water outlet (112) are all provided in the housing (11), the drive assembly (30) is mounted on the outer wall of the housing (11), and the valve core assembly (20) is rotatably connected to the housing (11); The upper cover (12) is detachably connected to the top of the shell (11), and the water inlet (121) is opened on the upper cover (12).

9. The drain valve according to claim 8, characterized in that: The shell (11) and the upper cover (12) are connected via a buckle.

10. A cleaning machine, characterized in that It comprises a water tank (1), a water drain seat (5) and a drain valve according to any one of claims 1 to 9, wherein one end of the water drain seat (5) is connected to the water tank (1), and the other end of the water drain seat (5) is connected to the inlet and outlet (111).

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