CN114052597A

CN114052597A - Sewage tank and floor cleaning machine

Info

Publication number: CN114052597A
Application number: CN202111554609.XA
Authority: CN
Inventors: 卢治敏; 曾国辉; 康津; 杨玉龙; 邓志龙
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-02-18

Abstract

The application relates to a sewage tank and floor cleaning machine. This sewage case includes: the air inlet pipe comprises a box body, an air inlet pipeline and a spiral piece. The box body is provided with a central axis, and one end of the box body, which is positioned on the central axis, is provided with an air suction opening which is communicated with the inside and the outside of the box body. The air inlet pipeline is arranged in the box body and communicated with the inside and the outside of the box body. The spiral part is arranged in the box and is located between the air inlet pipeline and the air exhaust opening, the spiral part comprises a cylinder and blades, the cylinder is arranged along the central axis, the blades are spirally wound on the cylinder around the central axis, the inner side walls of the blades, the main body and the box body jointly define a spiral air duct used for guiding the air flow flowing out of the air inlet pipeline to the air exhaust opening, and a first gap is formed between the outer spiral surface of the blades and the inner side wall of the box body. This application has prolonged the separation length of gas and solid-liquid rubbish to get rid of solid and liquid to the box inner wall through centrifugal force, make gas-solid separation and/or gas-liquid separation more thoroughly. Meanwhile, the pressure loss generated when the air flow turns through the spiral air duct is small, and the requirement of high air pressure of the fan is lowered.

Description

Sewage tank and floor cleaning machine

Technical Field

The application relates to the technical field of cleaning equipment, in particular to a sewage tank and a floor cleaning machine.

Background

The floor cleaning machine is used as a star product of cleaning products, a dust collector and a mop are innovatively combined to realize the integration of suction and mopping, dry and wet garbage can be treated simultaneously, the mop is free from being washed by hands, both hands can be liberated, the floor cleaning task can be easily finished, and more consumers prefer the floor cleaning machine.

The sewage tank structure is an important component of the floor washing machine, and the main function is collection, separation and storage of dry and wet garbage. The working process of the sewage treatment device is that the fan pumps out air from the air port to form negative pressure, and sewage and solid garbage are sucked into the sewage tank through a pipeline. When the existing sewage tank is used, sewage is sucked into the sewage tank and then collides with a baffle plate in the sewage tank, and then sewage sinks through a steering air channel, so that gas is sucked upwards. The inertial separation principle is adopted, and the gas-liquid is rushed towards the baffle plate and then rapidly turned, so that the motion track of the liquid/solid is different from that of the gas, and the purpose of gas-liquid/gas-solid separation is achieved. The sewage tank structure performs gas-liquid/gas-solid separation by a single baffle, not only separation is incomplete, and the cleaning difficulty of a user is increased, but also pressure loss is easily caused by rapid steering of gas and liquid after the gas and liquid impact on the baffle, and higher wind pressure requirements are provided for fan type selection.

Disclosure of Invention

This application is to the problem that the user clearance degree of difficulty that sewage case gas-liquid/gas-solid separation thoroughly leads to is big among the current scrubber and loss of pressure causes the fan wind pressure to require height greatly, has provided a sewage case and scrubber, and this sewage case and scrubber have the separation effectual and convenient clearance of just to reach the little technological effect that requires not high to the fan wind pressure of loss of pressure.

A waste tank comprising:

the box body is provided with a central axis, and one end of the box body, which is positioned on the central axis, is provided with an air suction port communicated with the inside and the outside of the box body;

the air inlet pipeline is arranged in the box body and communicated with the inside and the outside of the box body; and

the spiral piece is arranged in the box body and is positioned between the air inlet pipeline and the air exhaust port, the spiral piece comprises a cylinder and blades, the cylinder is distributed along the central axis, and the blades are spirally wound on the cylinder around the central axis;

the blade, the column and the inner side wall of the box body jointly define a spiral air duct for guiding the air flow flowing out of the air inlet pipeline to the air suction opening, and a first gap is formed between the outer spiral surface of the blade and the inner side wall of the box body.

In one embodiment, the air inlet pipe has an outlet end arranged toward an end of the air suction port, and the outlet end is arranged eccentrically to the central axis.

In one embodiment, the air inlet pipeline is connected with the inner side wall of the box body; one end of each blade in the extending direction is in butt joint with the outlet end, and the other end of each blade faces the air pumping hole.

In one embodiment, the pumping opening takes the central axis as an axis of the pumping opening.

In one embodiment, the first gap has a value ranging from 1mm to 5 mm.

In one embodiment, the width of the vanes corresponds to the diameter of the inlet duct.

In one embodiment, the outer spiral surface of the blade is provided with a first clamping portion, the inner side wall of the box body is provided with a second clamping portion matched with the first clamping portion, and the spiral piece is positioned and installed in the box body through the first clamping portion and the second clamping portion which are matched.

In one embodiment, the second clamping portion includes a clamping strip extending in a direction parallel to the central axis, the first clamping portion includes a plurality of clamping grooves matched with the clamping strip, and each clamping groove is located at a different position of the outer spiral surface of the blade.

In one embodiment, the box body comprises a box body and an upper shell, the box body is provided with an accommodating cavity with one open end, the upper shell is hermetically covered on the opening, the air inlet pipeline and the screw part are arranged in the accommodating cavity, and the upper shell is provided with the air suction opening.

A floor washing machine comprises the sewage tank in any one of the embodiments.

According to the sewage tank, during actual operation, airflow carries sewage into the tank body through the air inlet pipeline, and then the sewage rises to the air suction opening along the spiral air duct. The air current flows into spiral wind channel behind the admission line, and at the in-process that flows along spiral wind channel, under the effect of centrifugal force, on solid and liquid constantly were got rid of the inside wall of box to under the adhesion and the gravity combined action of the wall of the internal side wall of box, through the bottom of the inside wall whereabouts to the box of first clearance edge box, so realized the separation of gas and solid-liquid rubbish.

Compared with the prior art, the spiral air duct is formed by the spiral piece and the box body, so that the separation length of gas and solid-liquid garbage is prolonged, and the solid and liquid are thrown to the inner side wall of the box body by utilizing centrifugal force, so that gas-solid separation and/or gas-liquid separation are more thorough. Meanwhile, compared with the prior structure that the air liquid directly rushes to the baffle and then turns rapidly, the spiral air duct has small pressure loss generated when the air flow turns, and the requirement of high air pressure of the fan is reduced.

Drawings

FIG. 1 is a schematic view of an external structure of a waste water tank according to an embodiment of the present application;

FIG. 2 is an exploded view of the sump shown in FIG. 1;

fig. 3 is a sectional view of the sump shown in fig. 1.

Description of reference numerals:

100. a sewage tank;

110. a box body; 111. a tank body; 1111. an accommodating chamber; 112. an upper shell; 1121. an air extraction opening; 1122. an outer cover; 1123. an inner cover; 113. a second clamping part;

120. an air intake duct; 121. an outlet end;

130. a screw; 131. a cylinder; 132. a blade; 133. a first clamping part;

s, a spiral air duct;

l, a first gap.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

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

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, 2 and 3, in one embodiment, a waste water tank 100 includes a tank body 110, an air inlet pipe 120 and a screw 130. The box body 110 has a central axis, and an air exhaust hole 1121 for communicating the inside and the outside of the box body 110 is formed at one end of the box body 110 on the central axis. The intake duct 120 is provided in the case 110 and communicates the inside and the outside of the case 110. The screw 130 is disposed in the box 110 and located between the air inlet pipe 120 and the air exhaust hole 1121, the screw 130 includes a column 131 and blades 132, the column 131 is disposed along the central axis, and the blades 132 are spirally wound around the column 131. The blades 132, the main body and the inner sidewall of the box 110 together define a spiral duct S for guiding the air flow flowing out from the air inlet duct 120 to the air exhaust hole 1121, and a first gap L is formed between the outer spiral surface of the blades 132 and the inner sidewall of the box 110.

The "outer spiral surface of the blade 132" refers to a spiral surface of the blade 132 opposite to the inner sidewall of the box 110, and a first gap L is formed between the outer spiral surface of the blade 132 and the inner sidewall of the box 110, which indicates that the outer spiral surface of the blade 132 is close to and has a gap with the inner sidewall of the box 110, and further indicates that the spiral duct S is an open duct, and the spiral duct S is communicated with the inner space of the box 110 through the first gap L.

In the above-mentioned sewage tank 100, during actual operation, the air flow carries sewage into the tank 110 through the air inlet pipe 120, and then rises to the air extraction opening 1121 along the spiral air channel S. The air current flows into spiral wind channel S after flowing out inlet line 120, and at the in-process that flows along spiral wind channel S, under the effect of centrifugal force, solid and liquid are constantly got rid of on the inside wall of box 110 to under the adhesion and the gravity combined action of the wall of the inside wall of box 110, fall to the bottom of box 110 along the inside wall of box 110 through first clearance L, so realized the separation of gas and solid-liquid rubbish.

Compared with the prior art, the spiral air channel S is formed by the spiral piece 130 and the box body 110, so that the separation length of gas and solid-liquid garbage is prolonged, and the solid and liquid are thrown to the inner side wall of the box body 110 by utilizing centrifugal force, so that gas-solid separation and/or gas-liquid separation are more thorough. Meanwhile, compared with the prior structure that the air liquid directly rushes to the baffle and then turns rapidly, the spiral air duct has small pressure loss generated when the air flow turns, and the requirement of high air pressure of the fan is reduced.

Preferably, the case 110 is a cylindrical case 110 having a central axis as its own axis. The case 110 is cylindrical to facilitate installation of the screw 130, and is also easy to manufacture. In other embodiments, the casing 110 may have a cylindrical shape only in a portion corresponding to the screw 130.

In some embodiments, referring to fig. 3, the air inlet pipe 120 has an outlet end 121 disposed toward an end of the pumping hole 1121, and the outlet end 121 is disposed eccentrically from the central axis. The "outlet end 121 is disposed eccentrically from the central axis" means that the central line of the outlet end 121 does not coincide with the central axis. The outlet end 121 of the inlet duct 120 is one end located inside the case 110.

In this embodiment, exit end 121 and axis eccentric settings can avoid air current and sewage to collide with screw 130 back solid and liquid drop when dropping with admission line 120 mutually, cause loss of pressure, reduce the high wind pressure requirement of fan lectotype. Specifically, in the embodiment, the air inlet pipe 120 is attached to the inner side wall of the box 110, one end of the vane 132 in the extending direction is abutted to the outlet end 121, and the other end is disposed toward the pumping hole 1121.

In this embodiment, one end of the blade 132 is directly butted with the outlet end 121, so that the airflow flowing out through the outlet end 121 directly enters the spiral air duct S, the length of the spiral air duct S can be prolonged to enable separation to be more thorough, and pressure loss caused by random collision of the airflow inside the box body 110 can be reduced.

At this moment, the air current directly gets into spiral air duct S through air inlet duct in, the sewage that the air current carried gets rid of to the box 110 inside wall under the effect of centrifugal force, through the inside wall collision back with box 110, because the adhesion of inside wall and the effect of gravity fall to the box 110 bottom along box 110 inside wall, and then realized that solid or liquid separate out from the gas.

Of course, in other embodiments, one end of the vane 132 may not directly interface with the outlet end 121, that is, the outlet end 121 of the air inlet duct 120 is located at a distance from the inlet of the spiral duct S. At this time, after the air flow flows out from the outlet end 121, the flow direction of the air flow and the flow direction of the carried sewage are subjected to primary inertial separation, the sewage impacts on the blades 132 above the outlet end 121, part of the solid and the liquid sink towards the bottom of the box body 110, and when the other part of the solid and the liquid flow along with the air flow along the spiral air duct S, the solid and the liquid are thrown towards the inner side wall of the box body 110 under the action of centrifugal force and then fall to the bottom of the box body 110 along the inner side wall of the box body 110.

The "inlet duct 120 is connected to the inner sidewall of the box 110" may be that the inlet duct 120 and the box 110 are in a split type, and the outer wall of the inlet duct 120 is attached to the inner sidewall of the box 110, or the inlet duct 120 and the box 110 are in an integral type, so that the inlet duct 120 is connected to the inner sidewall of the box 110. It should be noted that, since the blades 132 of the screw 130 are also spirally raised along the inner sidewall of the box 110, when the air inlet duct 120 is connected to the inner sidewall of the box 110, one end of the blade 132 is continuously abutted to the air inlet duct 120.

Here, the "one end of the vane 132 in the extending direction is butted against the outlet end 121" may be that one end of the vane 132 is butted against the outlet end 121 in a form-fitting manner. For example, the outlet end 121 is a circular end, and one end of the vane 132 is a circular end matching with the circular end.

In particular embodiments, the air inlet duct 120 is disposed in a direction parallel to the central axis. At this time, the air inlet pipe 120 is a straight pipe, which can reduce the pressure loss caused by the structure of a bent pipe and the like, and the straight pipe is convenient to manufacture.

In some embodiments, the pumping ports 1121 have a central axis as their own axis. At this time, the air extraction opening 1121 and the spiral member 130 are coaxially arranged, so that little sewage is carried in the air flow in the last circle of the spiral air duct S, and the air flow passing through the last circle of the spiral air duct S can directly flow to the air extraction opening 1121, which is beneficial to reducing the pressure loss.

In some embodiments, the first gap L ranges from 1mm to 5 mm. Preferably, the first clearance L is 2 mm. When the value of the first gap L is within this range, it is possible to ensure that the sewage adhered to the inner side wall of the tank 110 flows downward and also to make the airflow mainly flow along the spiral duct S.

In some embodiments, the width of the vanes 132 is comparable to the diameter of the inlet duct 120. In this embodiment, the width of the blade 132 is equivalent to the diameter of the air inlet duct 120, if the width of the blade 132 is too large, not only the occupied space is occupied, but also the air duct length is reduced, the separation effect is weakened, if the width of the helical blade 132 is too small, the airflow flowing out of the air inlet duct 120 cannot sufficiently enter the helical blade 132, the efficiency is lowered, and the distance between the blades 132 is equivalent to the diameter of the air inlet duct 120 and is most reasonable.

In some embodiments, referring to fig. 2 and 3, the outer spiral surface of the blade 132 has a first engaging portion 133, the inner sidewall of the box 110 has a second engaging portion 113 engaged with the first engaging portion 133, and the screw 130 is positioned in the box 110 via the engaged first engaging portion 133 and the second engaging portion 113. When the screw 130 is installed, the first clamping portion 133 on the screw 130 is matched with the second clamping portion 113 in the box body 110, so that the screw 130 is positioned and installed in the box body 110.

Specifically, in the embodiment, the second engaging portion 113 includes an engaging strip extending in a direction parallel to the central axis, and the first engaging portion 133 includes a plurality of engaging slots, each engaging slot is located at a different position on the outer spiral surface of the blade 132. In actual operation, the screw 130 is guided into the box body 110 by the clamping strip, so that the screw 130 is prevented from deflecting. Meanwhile, the clamping strips are matched with the clamping grooves, so that stable connection of the screw part 130 can be realized.

In practical applications, the screw 130 can be integrally fixed by the cooperation of the clamping strip and the clamping slot and the abutting of the blade 132 and the outlet end 121.

In some embodiments, the waste water tank 100 further includes a filter assembly (not shown) disposed at the suction opening 1121 for only passing gas therethrough. At the moment, the last separation is carried out by utilizing the filtering component, so that the gas-solid and gas-liquid separation is more thorough. The filtering component can be a filter screen, filter cotton or a hypa filtering component, and the like, and is not limited specifically. In some embodiments, the box body 110 includes a box body 111 and an upper shell 112, the box body 111 has a receiving cavity 1111 with an opening at one end, the upper shell 112 is sealed and closed at the opening, the air inlet pipe 120 and the screw 130 are disposed in the receiving cavity 1111, and the upper shell 112 has a pumping hole 1121.

In this embodiment, the box body 110 is composed of a box body 111 and an upper shell 112, and the upper shell 112 can be detached from the box body 111, so as to facilitate installation of the screw 130 and dumping of garbage.

Further, referring to fig. 2 and 3, the upper housing 112 includes an inner cover 1123 and an outer cover 1122, the inner cover 1123 covers the opening, and the outer cover 1122 covers the inner cover 1123. The air extraction opening 1121 penetrates the inner cover 1123 and the outer cover 1122. In operation, the outer cover 1122 is used to connect to the fuselage and the inner cover 1123 is used to seal the opening. The outer cover 1122 and the inner cover 1123 are connected to the tank body 111.

The sewage tank 100 has the following beneficial effects:

1) the air flow carries the sewage into the box 110 through the air inlet pipe 120, and then rises to the air extraction opening 1121 along the spiral air duct S. The air current flows out of the air inlet pipeline 120 and then enters the spiral air duct S, and in the process of flowing along the spiral air duct S, under the action of centrifugal force, solid and liquid are continuously thrown onto the inner side wall of the box body 110, and fall to the bottom of the box body 110 along the inner side wall of the box body 110 through the first gap L under the combined action of adhesion and gravity of the wall surface of the inner side wall of the box body 110, so that the separation of gas and solid-liquid garbage is realized. So, form spiral wind channel S through spiral piece 130 and box 110, not only prolonged the separation length of gas and solid-liquid rubbish, utilize centrifugal force to get rid of solid and liquid to the box 110 inside wall moreover for gas-solid separation and/or gas-liquid separation are more thorough. Meanwhile, compared with the spiral air duct in the prior structure, the air-liquid directly rushes to the baffle plate and then rapidly turns, the pressure loss generated when the air flow turns is small, and the requirement of high air pressure of the fan is reduced.

2) The outlet end 121 is eccentrically arranged with the central axis, so that the air flow and the sewage collide with the air inlet pipeline 120 when the solid and the liquid drops fall after the collision of the spiral part 130, the pressure loss is caused, and the requirement of high air pressure for fan model selection is reduced.

3) One end of the blade 132 is directly butted with the outlet end 121, so that the airflow flowing out through the outlet end 121 directly enters the spiral air duct S, the length of the spiral air duct S can be prolonged, the separation is more thorough, and the pressure loss caused by the random collision of the airflow inside the box body 110 can be reduced.

Based on the same inventive concept, an embodiment of the present application further provides a floor washing machine, which includes the above-mentioned sewage tank 100. In the actual operation of the floor washing machine, the airflow carrying the sewage enters the interior of the box 110 through the air inlet pipe 120, and then rises to the air suction opening 1121 along the spiral air duct S. The air current flows into spiral wind channel S after flowing out inlet line 120, and at the in-process that flows along spiral wind channel S, under the effect of centrifugal force, solid and liquid are constantly got rid of on the inside wall of box 110 to under the adhesion and the gravity combined action of the wall of the inside wall of box 110, fall to the bottom of box 110 along the inside wall of box 110 through first clearance L, so realized the separation of gas and solid-liquid rubbish. Compared with the prior art, the spiral air channel S is formed by the spiral piece 130 and the box body 130, so that the separation length of gas and solid-liquid garbage is prolonged, and the solid and liquid are thrown to the inner side wall of the box body 110 by utilizing centrifugal force, so that gas-solid separation and/or gas-liquid separation are more thorough. Meanwhile, compared with the prior structure that the air liquid directly rushes to the baffle and then turns rapidly, the spiral air duct has small pressure loss generated when the air flow turns, and the requirement of high air pressure of the fan is reduced.

Since the scrubber includes the above-mentioned waste water tank 100, it includes the advantages of all the above-mentioned embodiments, and the description thereof is omitted.

In some embodiments, the floor washing machine further comprises a body, a floor brush and a power device, wherein the sewage tank 100, the floor brush and the power device are all mounted on the body, and the floor brush is positioned at the bottom of the body. On the airflow path, the floor brush, the sewage tank 100, and the power unit are sequentially disposed. When the sewage treatment device works, the power device provides airflow flowing power to enable negative pressure to be formed in the sewage tank 100, under the action of the negative pressure, sewage on the ground enters the sewage tank 100 through the floor brush and the machine body, gas-solid and/or gas-liquid separation is realized under the separation of the spiral piece 130, and finally solid-liquid garbage is reserved in the sewage tank 100. The specific configuration of the body, floor brush and power unit is not limited in this application. Of course, the scrubber may also include components such as a clean water tank mounted on the body, which are not described herein.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A sewage tank, characterized in that, comprising:

The box body (110) has a central axis, and one end of the box body (110) located on the central axis is provided with an air suction port (1121) connecting the inside and outside of the box body (110);

an air intake duct (120), which is arranged in the box body (110) and communicates with the inside and outside of the box body (110); and

A screw (130) is provided in the box body (110) and is located between the air intake pipe (120) and the air suction port (1121), the screw (130) includes a cylinder (131) ) and a blade (132), the cylinder (131) is arranged along the central axis, and the blade (132) is helically wound on the cylinder (131) around the central axis;

Wherein, the vane (132), the cylinder (131) and the inner side wall of the box (110) jointly define a space for guiding the airflow flowing out of the intake duct (120) to the suction The spiral air duct (S) of the air port (1121), and a first gap (L) is provided between the outer spiral surface of the blade (132) and the inner side wall of the box body (110).

2 . The sewage tank according to claim 1 , wherein the air inlet pipe ( 120 ) has an outlet end ( 121 ) disposed toward the end where the air suction port ( 1121 ) is located, and the outlet end ( 121 ) Set eccentrically with the central axis.

3. The sewage tank according to claim 2, characterized in that, the air inlet pipe (120) is connected to the inner side wall of the box body (110); one end of the blade (132) in the extending direction is connected to The outlet ends (121) are butted together, and the other end is arranged toward the air suction port (1121).

4. The sewage tank according to claim 1, characterized in that, the air suction port (1121) takes the central axis as its own axis.

5 . The sewage tank according to claim 1 , wherein the value of the first gap (L) ranges from 1 mm to 5 mm. 6 .

6. The sewage tank according to claim 1, wherein the width of the vane (132) is equivalent to the diameter of the air intake duct (120).

7. The sewage tank according to claim 1, characterized in that, the outer helical surface of the blade (132) has a first clamping part (133), and the inner side wall of the box (110) has a The first snap portion (133) is matched with the second snap portion (113), and the screw member (130) is positioned and installed via the matched first snap portion (133) and the second snap portion (113). in the box (110).

8. The sewage tank according to claim 7, characterized in that, the second clamping portion (113) comprises a clamping strip extending in a direction parallel to the central axis, and the first clamping portion (133) ) includes a plurality of card slots matched with the clip bars, and each of the card slots is located at a different position on the outer helical surface of the blade (132).

9 . The sewage tank according to claim 1 , wherein the tank body ( 110 ) comprises a tank body ( 111 ) and an upper shell ( 112 ), and the tank body ( 111 ) has an accommodating cavity ( 111 ) with one end open. 10 . 1111), the upper shell (112) is sealed and covered with the opening, the air intake pipe (120) and the screw (130) are provided in the accommodating cavity (1111), the upper shell (112) ) has the suction port (1121).

10. A floor washing machine, characterized by comprising the sewage tank (100) according to any one of claims 1 to 9.