CN215305563U

CN215305563U - Sewage tank assembly and cleaning equipment thereof

Info

Publication number: CN215305563U
Application number: CN202120608226.5U
Authority: CN
Inventors: 刘望; 乔亮
Original assignee: Beijing Rockrobo Technology Co Ltd
Current assignee: Beijing Rockrobo Technology Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-12-28
Anticipated expiration: 2031-03-25

Abstract

The utility model discloses a sewage tank assembly and a cleaning device thereof, comprising a sewage tank body (5); a sewage tank upper cover (4) fixed at the upper end of the sewage tank body (5), and the lower part of the sewage tank upper cover is provided with an air suction channel (44) extending into the cyclone separation part (3); the cyclone separation part (3) is arranged in the sewage tank body (5) and connected with the sewage tank upper cover (4) and is used for separating gas and liquid in the gas-liquid mixture entering the sewage tank; the sewage tank is characterized in that a vertical sewage inlet channel (31) is arranged in the sewage tank body (5) and used for leading gas-liquid mixture into the cyclone separation part (3) from bottom to top, and a water blocking piece (6) which is arranged in the air suction channel (44) in a sliding mode and used for floating upwards under the action of sewage buoyancy to prevent air flow from entering the sewage tank upper cover (4). By adopting the technical scheme of the utility model, the technical problem of sewage backflow in the prior art can be effectively solved, the service life of the cleaning equipment is prolonged, and the maintenance cost is reduced.

Description

Sewage tank assembly and cleaning equipment thereof

Technical Field

The utility model relates to the technical field of cleaning equipment, in particular to a sewage tank assembly and cleaning equipment with the same.

Background

Along with the development of cities, the grade of road construction is improved, lanes are frequently required to be cleaned except daily cleaning, at present, some motor-driven cleaning equipment or equipment is provided, the traditional cleaning machine is provided with a sewage tank, a fan and the like, the sewage tank is used for collecting sewage generated by a cleaning host machine in the cleaning process, in the using process, the sewage tank pumps away air in the tank through the fan, so that negative pressure is formed in the sewage tank to suck away the sewage generated by the cleaning host machine in the cleaning process, but in the actual use process, the sewage in the sewage tank easily flows to the fan, so that the fan is burnt out, and the floor cleaning machine is damaged.

Based on the technical problem that sewage flows backwards when the existing floor washing machine is used, the utility model provides a floor washing machine with a novel sewage tank assembly and the sewage tank assembly, which can effectively avoid the technical problem that sewage flows backwards to an air inlet machine.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model discloses a sewage tank assembly and cleaning equipment with the same, and at least solves the technical problem that sewage flows back to an air inlet machine in the prior art.

According to an aspect of an embodiment of the present invention, there is provided a wastewater tank assembly including: a sewage tank body 5; the upper cover 4 of the sewage tank is detachably fixed at the upper end of the box body 5 of the sewage tank, and the lower part of the upper cover 4 of the sewage tank is also provided with an air suction channel 44 extending into the cyclone separation part 3; the cyclone separation part 3 is arranged in the sewage tank body 5 and connected with the sewage tank upper cover 4 and is used for separating gas and liquid in the gas-liquid mixture entering the sewage tank; wherein, a vertical sewage inlet channel 31 is arranged in the sewage tank body 5 and is used for leading the gas-liquid mixture into the cyclone separation part 3 from bottom to top.

Preferably, the sewage inlet passage 31 is disposed in the cyclone separating unit 3, and has a lower end communicating with the sewage inlet 55 below the sewage tank body 5 and an upper end passing through an opening in a sidewall of the cyclone separating unit 3 to communicate with the sewage tank body 5. By arranging the sewage inlet channel 31 in the cyclone separation part 3, the space in the sewage tank body 5 can be greatly saved, which is beneficial to the miniaturization of the whole sewage tank assembly.

Preferably, a water blocking member 6 is further provided, slidably disposed in the suction channel 44, for floating up by buoyancy of the sewage to prevent the air flow from entering the sewage tank upper cover 4. According to the sewage tank assembly, when the sewage in the sewage tank reaches a certain height, the water blocking piece 6 floats upwards to effectively block the airflow inlet of the upper cover 4 of the sewage tank, so that the sewage is prevented from entering the fan due to the fact that the sewage enters the upper cover 4 of the sewage tank along with the airflow, and the fan is prevented from being damaged.

Further, the length of the water blocking member 6 is set such that, when the height of the sewage reaches a preset value between 1/3 and 1/2 of the height of the sewage tank body 5, the water blocking member 6 floats up to block the air duct opening 42 at the connection between the sewage tank upper cover 4 and the air suction channel 44, or floats up to block the one or more openings to prevent the air flow from entering the air suction channel 44, so as to prevent the air flow from entering the sewage tank upper cover 4.

Optionally, the side wall of the suction channel 44 is provided with one or more openings through which the airflow from the cyclonic separating unit 3 enters the suction channel 44 and then the sump cover 4. In this case, it is preferable that the length of the water blocking member 6 is set such that, when the height of the contaminated water reaches a certain preset value, for example, 1/3 between 1/3 and 1/2 of the height of the contaminated water tank body 5, the water blocking member 6 floats up to block the one or more openings to prevent the air flow from entering the suction channel 44.

With this arrangement, once the waste water in the waste water tank body 5 has accumulated to, for example, its height 1/3, the passage of the air flow into the waste water tank upper cover 4 is blocked, triggering the fan to stop. Therefore, the gas-liquid mixture can rotate in the sewage tank body 5 in a large enough space and be fully separated, and sewage and the gas-liquid mixture which is not completely separated are prevented from entering the sewage tank upper cover 4, and further prevented from entering the fan and damaging the fan.

Alternatively, the water blocking member 6 may have a length such that it is exposed to the opening of the side wall of the air duct port 42 or the suction passage 44 when it is lowered by its own weight, so that the air flow enters the sump cover 4 from the cyclone separating unit 3.

Alternatively, the water blocking member 6 is cylindrical or spherical, and its outer contour matches the inner shape of the suction channel 44. Thus, the water blocking member 6 can be freely slid up and down on the suction passage 44.

The water blocking piece 6 is of a hollow structure or a solid structure with the density smaller than that of water, so that the water blocking piece 6 can float on the water surface and further can float sufficiently under the buoyancy action of the water to block the air inlet.

When the water blocking member 6 floats to a position where the air current is prevented from entering the upper cover 4 of the sewage tank, the air outlet 43 at the upper end of the air suction channel 44 and/or one or more openings on the side wall thereof are blocked so as to prevent the air current from entering, thereby triggering the suction fan to stop sucking air, and protecting the fan from being damaged by sewage. Or, the alarm can be triggered in time to remind the user of removing the sewage in time.

Optionally, the sewage tank assembly further includes a filter 2 detachably disposed between the air outlet 43 of the air suction channel 44 and the air suction inlet 12 of the fan, and configured to filter the separated air and filter out dust or fine particles in the air.

According to another aspect of the present invention, there is also provided a cleaning apparatus including: the above-mentioned sewage tank assembly; a fan connected to the sewage tank assembly through a fan suction opening 12; a floor cleaning assembly connected to the external interface 13 of the waste tank assembly.

The sewage tank assembly for the cleaning equipment provided by the utility model can effectively avoid sewage backflow in the use process, prolong the service life of the cleaning equipment and reduce the maintenance cost.

Drawings

Fig. 1 is an external structure of a wastewater tank assembly according to an embodiment of the present invention;

FIG. 2 is a sectional view showing an inner structure of a wastewater tank assembly according to an embodiment of the present invention;

FIG. 3 is an exploded view showing the inner structure of a sewage tank assembly according to an embodiment of the present invention;

fig. 4 is a schematic flow direction diagram of an operation air flow of a waste water tank assembly according to an embodiment of the present invention.

In the figure:

1-a sewage tank support housing; 12-a fan air suction inlet; 13-an external interface;

2-a filter;

3-a cyclonic separation section; 31-a sewage inlet channel; 32-cyclonic sealant;

4-upper cover of sewage tank; 41-upper cover body; 42-air duct opening; 43-air outlet; 44-a suction channel;

5-a sewage tank body; 51-a box body; 52-water inlet sealing soft glue; 54-sealing silica gel on the upper cover of the sewage tank; 55-a sewage inlet;

6-water-blocking piece;

7, a water tank disassembling component; 71-key fixing box; 72-key press; 73-a key spring;

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 shows an external structure of a sewage tank assembly of the present invention.

As shown in fig. 1, the wastewater tank assembly of the present invention includes a wastewater tank support case 1, a wastewater tank body 5, a wastewater tank upper cover 4, a cyclone separating unit 3, a water blocking member 6, and optionally, a filter 2 disposed in the wastewater tank upper cover 4.

The sewage tank supporting housing 1 is used for supporting and fixing a sewage tank body 5 and a sewage tank upper cover 4, specifically, the sewage tank body 5 is detachably fixed on the inner side of the lower part of the sewage tank supporting housing 1, the sewage tank upper cover 4 is detachably fixed between the sewage tank body 5 and the inner side of the upper part of the sewage tank supporting housing 1, and the lower part is also provided with an air suction channel 44 extending into the cyclone separating part 3.

The lower part of the sewage tank supporting shell 1 is provided with an external interface 13, and the upper part is provided with a fan air suction inlet 12. The external interface 13 is used for communicating with a floor cleaning assembly (such as a floor washing machine) and the sewage tank body 5, sucking a mixture of gas and sewage into the sewage tank body 5 under the action of a fan, and the fan suction inlet 12 is used for communicating with the fan and the sewage tank upper cover 4 and discharging separated gas into the fan from the sewage tank upper cover 4.

Fig. 2 is a sectional view showing the internal structure of the sewage tank assembly of the present invention.

Fig. 3 shows an exploded view of the inner structure of the sewage tank assembly of the present invention.

As shown in fig. 2 and 3, the sewage tank assembly further includes a cyclone separating unit 3, a sewage tank upper cover 4 and a sewage tank body 5, wherein the cyclone separating unit 3, the sewage tank upper cover 4 and the sewage tank body 5 are assembled with each other, and are jointly accommodated inside the sewage tank supporting housing 1, and are supported and fixedly assembled by the sewage tank supporting housing 1.

The cyclone separation part 3 is hermetically connected with the upper cover 4 of the sewage tank through cyclone sealant 32, a plurality of separation holes are formed in the cyclone separation part 3, the gas-liquid mixture enters the cyclone separation part 3 and then rotates, and liquid in the gas-liquid mixture is separated from the gas through the separation holes and sinks into the sewage tank body 5 along the side wall of the cyclone separation part 3.

A vertical sewage inlet channel 31 is arranged in the sewage tank body 5 and is used for guiding a gas-liquid mixture into the cyclone separation part 3 from bottom to top. Preferably, the sewage inlet channel 31 is arranged in the cyclone separation part 3, the lower end of the sewage inlet channel is communicated with the sewage inlet 55 below the sewage tank body 5, the upper end of the sewage inlet channel passes through the opening on the side wall of the cyclone separation part 3 to be communicated with the sewage tank body 5, and the mixture of the gas and the sewage enters the sewage inlet channel 31 through the sewage inlet 55 under the action of the fan and then enters the cyclone separation part 3 to rotate so as to realize gas-liquid separation. Preferably, the cyclonic separating section 3 is tapered to facilitate rotation of the gas-liquid mixture.

Preferably, in the embodiment of the present patent, the dirt intake passage 31 for inputting the gas-liquid mixture is provided inside the cyclone separating unit 3, and is formed in a passage shape extending from bottom to top. Further, the sewage intake passage 31 inside the cyclone separating unit 3 is formed as a "Γ" -shaped duct including a vertical duct and a lateral inlet communicating with each other, wherein the vertical duct is provided to extend to a certain height from below to above inside the cyclone separating unit 3, and the lateral inlet is formed to laterally penetrate the wall of the cyclone separating unit 3 to communicate with the sewage tank case 5.

Through the dirty passageway 31 of advancing that sets up "gamma" form (or fall L form) in cyclone separation portion 3 inside for gas-liquid mixture is unanimous with the effect direction of rotatory centrifugal force by lower supreme, by interior rotation outside along advancing dirty passageway 31, thereby more is favorable to the formation of rotatory air current and the promotion of rotation speed, and then has improved the efficiency that realizes gas-liquid separation through rotatory centrifugal force. On the other hand, the sewage inlet channel 31 is arranged inside the cyclone separation part 3, so that the excessive occupation of the internal space of the sewage tank body 5 is avoided, and the size of the cyclone separation part 3 can be designed to be larger under the condition that the whole volume of the sewage tank assembly is not increased, thereby being beneficial to generating sufficient and high-speed selected airflow; the space between the cyclone separating part 3 and the sewage tank body 5 is larger, which is beneficial to containing more sewage and is finally beneficial to the overall miniaturization of the sewage tank assembly.

The sewage tank body 5 includes a body 51, and a sewage inlet 55 at a lower end of the body 51. The sewage tank body 51 is used for storing sewage, the lower port of the sewage inlet 55 at the lower end of the sewage tank body is hermetically communicated with the external interface 13 of the sewage tank supporting shell 1, and sewage generated by the scrubber enters the sewage tank body 5 through the sewage inlet 55. Preferably, the dirt inlet 55 is disposed below the cyclone separation unit 3, and an upper port thereof communicates with the dirt inlet passage 31 in the cyclone separation unit 3. Thus, the external sewage gas-liquid mixture is directly introduced into the sewage inlet passage 31 in the cyclone separating unit 3 through the sewage inlet 55 from the bottom to the top. Preferably, the sewage inlet 55 is sealed and connected with the water inlet soft sealing glue 52.

In the embodiment of the present patent, the sewage inlet passage 31 for inputting the sewage gas-liquid mixture is provided inside the cyclone separating unit 3, thereby contributing to the miniaturization of the whole of the sewage tank assembly. However, the present patent is not limited thereto, and alternatively, the dirt intake passage 31 may be provided outside the cyclone separating unit 3 and formed as a tubular passage extending upward from below.

The upper cover 4 of the sewage tank comprises an upper cover body 4 and an air suction channel 44 positioned at the lower part of the upper cover body 41, the air suction channel 44 extends downwards for a certain length relative to the upper cover body 41, an opening of the air suction channel 44 positioned on the upper cover body 41 is an air outlet 43, a lower port is an air duct opening 42, and the side wall of the air suction channel 44 is provided with one or more openings, so that air enters the air suction channel 44 through the openings and then enters the upper cover 4 of the sewage tank. The water blocking member 6 is provided in the suction passage 44 to block the sewage from entering the sewage tank upper cover 4 through the suction passage 44.

The water-blocking member 6 can be formed into a solid or hollow structure so as to float on the water surface. Therefore, when the water blocking member 6 has a solid structure, it is preferably made of a material having a density lower than that of water. The outer contour of the water blocking member 6 may be a column shape, an inverted cone shape, or a sphere shape, or may be matched with the inner shape of the suction passage 44, so as to be capable of moving up and down in the suction passage 44 and blocking the suction passage 44 in a vertical direction, thereby preventing the sewage from passing through the suction passage 44. Based on the above characteristics, the water blocking piece 6 can float on the water surface in the air suction channel 44 and slide up and down along with the water level change, when the height of the sewage reaches a preset value, the water blocking piece 6 floats up to the position blocking the air outlet 43 to cause the fan to block rotation or trigger alarm, the fan stops sucking air, and an operator is informed to discharge the sewage.

Preferably, the water blocking member 6 is provided in a column shape, and the length thereof is set such that when the water blocking member 6 slides down and abuts against the bottom of the cyclone separating unit 3, the upper end of the water blocking member 6 is in the suction passage 44 and exposes the side wall opening of the suction passage 44; when the height of the sewage reaches 1/3-1/2 of the box body 51, the water blocking piece 6 can float to the position blocking the air outlet 43 under the buoyancy action of the sewage, and an alarm is triggered after the air outlet 43 is blocked, or the suction fan is triggered to stop rotating.

In another alternative embodiment, the outer profile of the water blocking member 6 is formed in a reverse taper shape, and in this case, the inner wall of the suction channel 44 is also formed in a reverse taper shape, and the reverse tapers of the two are fitted to each other. Thus, the water blocking member 6 can be supported by the inner wall of the suction passage 44 under the gravity to expose the air outlet 43 at the upper end of the suction passage 44 and/or the opening of the side wall. When the sewage is accumulated to a certain height, the water blocking piece 6 floats upwards under the buoyancy of the sewage until the air outlet 43 at the upper end of the air suction channel 44 and/or the opening of the side wall are blocked, so that the air flow is prevented from entering the air suction channel 44 and/or the upper cover 4 of the sewage tank.

In a preferred embodiment, in order to maximize the gas-liquid separation effect of the cyclone separation section 3, the water blocking member 6 has a length such that when the height of the polluted water reaches 1/3 of the case body 51, the water blocking member 6 floats up to a position blocking the air outlet 43; when the sewage is emptied, the water blocking member 6 slides down under its own weight, thereby sufficiently exposing the opening of the side wall of the air outlet 43 and/or the air suction channel 44 for the air flow to enter. In this case, a sufficient space is formed in the cyclone 3, and the sewage can be sufficiently rotated at a high speed in the cyclone 3 to separate the gas and the liquid, thereby optimizing the gas and liquid separation effect. In an alternative embodiment, the water blocking member 6 slides down under its own weight to abut against the bottom of the cyclone separating unit 3, or is supported on the air suction channel 44 by an inverted cone-shaped profile, or is locked on the air suction channel 44 by providing a locking protrusion structure, and in any embodiment, the opening capable of exposing the side wall of the air outlet 43 and/or the air suction channel 44 is used for facilitating the air flow.

In some embodiments, the upper cover 4 of the sewage tank and the tank body 5 of the sewage tank are hermetically connected through the upper cover sealing silica gel 54, and the connection between the upper cover 4 of the sewage tank and the tank body 5 of the sewage tank may be a threaded connection or a snap connection, that is, is not limited to any detachable connection.

In some embodiments, the filter 2 is accommodated in the upper cover body 41 of the upper cover 4 of the waste water tank, and is located between the air outlet 43 of the air suction channel 44 and the air suction inlet 12 of the blower to filter the separated air, and the filter 2 and the upper cover body 41 may be inserted or connected by riveting screws, but not limited to the above two detachable connections.

In some embodiments, the suction channel 44 and the sewage inlet channel 31 are both eccentrically arranged relative to the sewage tank body 5, and are oppositely arranged, so that the mixing of sewage and air has a buffering process, and the separation effect is better.

In some embodiments, the sewage draining device further comprises a water tank disassembling component 7 which is located on one side of the sewage tank upper cover 4 and at the upper end of the sewage tank body 5 and facilitates sewage to be drained from the sewage tank body 5, the water tank disassembling component 7 comprises a button fixing box 71, a button 72 and a button spring 73, the lower part of the button 72 can be clamped on the button spring 73, the upper part of the button 72 is provided with a buckle and can be buckled inside the button fixing box 71 together with the button disassembling spring 73, when the water tank disassembling component 7 needs to be opened, the buckle of the button 72 is pressed to be separated from the button fixing box 71, and the button 72 is upwards popped under the action of the button disassembling spring 73, so that a sewage draining channel is opened.

In some embodiments, the sewage drainage channel is opened by providing a drainage hole on the sewage tank upper cover 4, and after the water tank disassembly assembly 7 is opened, sewage is drained through the drainage hole of the sewage tank upper cover 4.

In some embodiments, the sewage drainage path is opened by opening the tank detachment assembly 7, opening the sewage tank support case 1, and removing the sewage tank upper cover 4 from the sewage tank body 5, thereby draining the sewage from the sewage tank body 5.

In some embodiments, the sewage drainage path is opened by opening the sewage tank support case 1 after opening the tank detachment assembly 7, and having a rotation axis between the other side of the sewage tank upper cover 4 from the tank detachment assembly 7 and the sewage tank body 5, so that the sewage tank upper cover 4 is rotated upward about the rotation axis to open, thereby draining the sewage from the sewage tank body 5.

In some preferred embodiments, the axis of the fan suction opening 12 is at an angle relative to the axis of the sump body 5, and the axis of the external connection 13 is at an angle relative to the axis of the sump body 5. Through the eccentric design, the dirt inlet and the air inlet are not positioned on a central shaft, so that liquid and gas are mixed to form a longer buffer path, and better gas-liquid separation is facilitated.

The following further describes the embodiments of the present invention with reference to the working principle.

A sewage tank assembly for a cleaning device has a sewage tank supporting housing 1, a fan suction opening 12 and an external interface 13, the external interface 13 is connected with an external ground cleaning assembly, such as a floor washing machine, the fan suction opening 12 is connected with a fan, the sewage tank assembly sucks a mixture of gas and sewage liquid into a sewage tank assembly 5 through the external interface 13 under the action of the fan; the gas-liquid mixture of the gas and the dirty liquid rotates in the direction of the cyclone 3, as shown in fig. 4; because the density of the gas is different from that of the liquid, when the liquid and the gas are mixed together and rotate and flow, the centrifugal force applied to the liquid is larger than that of the gas, so that the liquid has a tendency of centrifugal separation, the outer side wall of the cyclone separation part 3 and the inner side wall of the box body 51 form a separation wall, the separated liquid is attached to the separation wall, due to the action of gravity, the liquid is collected downwards into the sewage box body 5, the separated gas enters the inside of the cyclone separation part 3 through the separation holes in the cyclone separation part 3, enters the air suction channel 44 through the opening of the side wall of the air suction channel 44, passes through the air suction inlet 12 of the fan after impurities are filtered by the filter 2, and is discharged under the action of the fan.

Still be provided with in the sewage case box 5 and hinder water spare 6, when the dirty liquid in the sewage case box 5 reachs and predetermines the liquid level, hinder water spare 6 come-up to the position of plugging up air outlet 43 to seal up fan inlet scoop 12, prevent that the dirty liquid in the sewage case box 5 from flowing backwards to the fan in and burning out the fan.

After the sewage tank body 5 is filled with sewage, the water tank disassembling component 7 is pressed down, and the sewage in the sewage tank body 5 can be dumped for work again. After the sewage is cleaned up, the water blocking member 6 slides downwards under the action of the gravity of the water blocking member, and the opening of the side wall of the air suction channel 44 and the air outlet 43 at the upper part are exposed again, so that the air can enter conveniently.

According to another embodiment of the utility model, the cleaning equipment using the sewage tank assembly of the above embodiment is also provided, the cleaning equipment can be adapted to the above sewage tank assembly, a fan suction inlet (12) of the sewage tank assembly is connected with a fan, and an external interface (13) of the sewage tank assembly is connected with a floor washing machine.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A waste tank assembly, comprising:

a sewage tank body (5);

the upper cover (4) of the sewage tank is detachably fixed at the upper end of the body (5) of the sewage tank, and the lower part of the upper cover (4) of the sewage tank is also provided with an air suction channel (44) extending into the cyclone separation part (3);

the cyclone separation part (3) is arranged in the sewage tank body (5) and connected with the sewage tank upper cover (4) and is used for separating gas and liquid in the gas-liquid mixture entering the sewage tank;

wherein, a sewage inlet channel (31) is arranged in the sewage tank body (5) and is used for leading the gas-liquid mixture into the cyclone separation part (3) from bottom to top.

2. The waste tank assembly of claim 1, further comprising:

the sewage inlet channel (31) is arranged in the cyclone separation part (3), the lower end of the sewage inlet channel is communicated with a sewage inlet (55) below the sewage tank body (5), and the upper end of the sewage inlet channel penetrates through an opening in the side wall of the cyclone separation part (3) to be communicated with the sewage tank body (5).

3. The waste tank assembly of claim 1 or 2, further comprising:

and the water blocking piece (6) is slidably arranged in the air suction channel (44) and is used for floating upwards under the buoyancy action of sewage to prevent the airflow from entering the upper cover (4) of the sewage tank.

4. The waste tank assembly of claim 3, further comprising:

the length of the water blocking piece (6) is set to be that when the height of sewage reaches a preset value between 1/3 and 1/2 of the height of the sewage tank body (5), the water blocking piece (6) floats upwards to block an air duct opening (42) at the joint of the sewage tank upper cover (4) and the air suction channel (44), or floats upwards to block the one or more openings to prevent air flow from entering the air suction channel (44) to prevent air flow from entering the sewage tank upper cover (4).

5. The waste tank assembly of claim 4, further comprising:

the water blocking member (6) is formed to have a length such that it exposes the opening of the air duct opening (42) or the side wall of the suction passage (44) when it is lowered, so that the air flow enters the sump cover (4) from the cyclone separating unit (3).

6. The waste tank assembly of any of claims 1-5, further comprising:

the water blocking member (6) is cylindrical, inverted conical or spherical, and the external contour thereof is matched with the internal shape of the air suction channel (44).

7. The waste tank assembly of any of claims 1-6, further comprising:

the water-blocking member (6) is of a hollow structure or a solid structure with density less than that of water.

8. The waste tank assembly of any of claims 1-5, further comprising:

when the water blocking piece (6) floats to the position preventing the air flow from entering the upper cover (4) of the sewage tank, the air suction is blocked, and the suction fan is triggered to stop air suction and/or the alarm is triggered.

9. The waste tank assembly of any of claims 1-8, further comprising:

and the filter (2) is detachably arranged between the air outlet (43) of the air suction channel (44) and the air suction opening (12) of the fan and is used for filtering the separated gas.

10. A cleaning apparatus, comprising:

the sump assembly of any of claims 1-9;

a fan connected to a fan suction opening (12) of the sump assembly;

a floor cleaning assembly connected to a sewage inlet (55) of the sewage tank assembly by a sewage suction line.