CN115067825A

CN115067825A - Centrifugal separation unit, centrifugal separation structure, ground washing assembly and ground washing machine

Info

Publication number: CN115067825A
Application number: CN202110561585.4A
Authority: CN
Inventors: 方剑强; 郑建明; 王胜林
Original assignee: Ningbo Fujia Industrial Co Ltd
Current assignee: Ningbo Fujia Industrial Co Ltd
Priority date: 2021-03-15
Filing date: 2021-05-22
Publication date: 2022-09-20
Also published as: CN115067826A; CN215899558U; CN115067828A; CN215899555U; CN215899557U; CN215899556U; CN115067827A

Abstract

The invention provides a centrifugal separation unit, which comprises a gas inlet and a centrifugal separation cavity, wherein a gas-liquid mixture from the gas inlet enters the centrifugal separation cavity, the centrifugal separation cavity separates gas from liquid by utilizing the rotating centrifugal force of the gas-liquid mixture, and the separated gas flow is discharged from a gas outlet; also provides a centrifugal separation structure, which adopts the centrifugal separation unit; also provides a ground washing assembly which is provided with the centrifugal separation structure; a floor washing machine is also provided, and the floor washing machine is provided with the floor washing assembly.

Description

Centrifugal separation unit, centrifugal separation structure, ground washing assembly and ground washing machine

Technical Field

The invention relates to the technical field of cleaning electric appliances, in particular to a centrifugal separation unit, a centrifugal separation structure, a floor washing assembly and a floor washing machine.

Background

The separation structure is the core subassembly of scrubber, and the effect of separation structure lies in carrying out gas-liquid separation with the aqueous vapor mixture that clean end clean ground produced, and sewage is then kept in the slop pail by the separation, and the air after the separation is then taken out by the fan, and the emission is in the environment to realize whole work flow.

The separation structure which is commonly used at present is a separation cover structure, the separation cover structure comprises an air inlet and a separation cover, a gas-liquid mixture from the air inlet is sucked into a sewage bucket and is blocked by an opening of the separation cover, the separation cover separates gas from liquid by using the blocking effect of the separation cover, the separation cover structure has the advantages of large circulation and difficulty in blocking, but the gas-liquid separation effect is not high, so that a fan and related parts are required to have good waterproof performance, and otherwise, faults can be caused.

In order to obtain a better separation effect, a centrifugal separation structure is tried to perform gas-liquid separation, but the existing scheme has a problem that in order to realize that the airflow entering the cyclone cavity firstly rotates close to the inner circumferential surface of the cyclone cavity to form cyclone separation (the rotation close to the inner circumferential surface of the cyclone cavity to form cyclone is beneficial to improving the separation effect), and in addition, in order to maximize the contact between the entering airflow and the inner circumferential surface of the cyclone cavity (also to improve the separation effect), a design of arranging a tangential air inlet at the circumferential wall of the cyclone cavity is adopted, and the main technical scheme of the centrifugal separation structure can be seen in a suction type cleaning device and a centrifugal separator disclosed in an invention granted patent of a granted publication number CN102018474B, and the description in paragraph 0043 of the specification can be seen: the working air mixture flows through the nozzle outlet 40 and into the working air conduit 42, from which it is delivered to the centrifugal separator 30 through the tangentially oriented separator inlet 54. As the working air mixture enters from the inlet 54, it spins around the outside of the separation chamber 52. As the mixture spins around the separation chamber 52, centrifugal force acts on the liquid and dense debris, pushing it outward toward the cylindrical sidewall 46, while the less dense dry air moves inward toward the expanding exhaust inlet 64 at the center of the separator 30. The vertically elongated rectangular inlet 54 tends to flatten the working air mixture to maximize contact of the mixture with the inner surface of the cylindrical sidewall 46. Friction between the working air mixture and the cylindrical sidewall 46 tends to break up entrained foam bubbles, thereby releasing trapped air and allowing moisture to deposit on the inner surface of the cylindrical sidewall 46. Gravity pulls the dense liquid and debris downward to collect the liquid and debris. In addition, the high rotational velocity of the working air around the outer periphery of the flared inlet 64 reduces re-entrainment of liquid in the exhaust flow. Thus, the dry exhaust air is separated from the working air mixture and drawn inwardly toward the flared exhaust inlet 64.

In addition, please refer to the technical solution disclosed in the chinese patent application with application publication No. CN108402989A, and the description of the technical solution in paragraph 0026 is as follows: the cyclone-type separation structure 400 comprises an inner wall 410, a middle wall 420 and an outer wall 430 which are sleeved from inside to outside to form three chambers which are arranged in a circuitous manner, wherein the three chambers are a first chamber A, a second chamber B and a third chamber C from inside to outside respectively, the three chambers are nested around the same axis, and the three chambers effectively prolong the moving path of water vapor in the cyclone-type separation structure 400, so that the water vapor is separated more thoroughly. Further, a first chamber a surrounded by the inner wall 410 is located at the radially inner end of the whole cyclone-type separation structure 400, an inlet 414 is arranged at the bottom end of the first chamber a, the inlet is flared, the top end of the inlet 401 is correspondingly provided with a protruding lug 403, the bottom of the first chamber a is hermetically connected with a channel inside the inlet 401, and during assembly, a flared opening of the inlet 414 is correspondingly used for accommodating the lug 403. A support column 411 and a spiral guide 412 disposed around the support column 411 are disposed in the first chamber a. The middle wall 420 is sleeved on the periphery of the inner wall 410, and the enclosed space forms

The top of the second chamber B is provided with a first opening 413 for discharging water vapor to the second chamber B at the radial middle end, so that the opening position of the first opening 413 is close to the top end of the second chamber B. The top end of the second chamber B is closed, the bottom end is provided with a second opening 421, and the second opening 421 is an annular opening. In order to ensure that the three chambers are arranged in a circuitous manner, and the mixed gas can sequentially pass through the first chamber A and the second chamber B and then enter the third chamber C, the tail end of the inner wall 410 protrudes out of the tail end of the middle wall 420, the middle wall 420 extends upwards at the closed position of the top end of the second chamber B to form an air passage 422, a plurality of meshes 423 are formed in the wall surface of the air passage 422, and the top end of the air passage 422 is connected with the extension pipe 200. In this embodiment, the air channel 422 is integrally formed with the middle wall 420 for easy manufacturing. In practical applications, the air passage 422 may be formed as another element separately and then fixed to the top end of the middle wall 420. The outer wall 430 surrounds the middle wall 420, and the space surrounded between the outer wall and the middle wall 420 forms a third chamber C. The mesh 423 of the air passage is in communicating relationship with the third chamber C, thereby ensuring that the chamber C is in communicating relationship with the air passage 422 through the mesh 423.

And paragraph 0026 records: the rolling brush 301 rolls on the surface to be cleaned, the air inlet of the floor brush 300 sucks in the water-vapor mixture, the water-vapor mixture enters the first chamber a from the inlet channel 401, under the guiding action of the spiral guiding structure 412, the water-vapor mixture passing through the chamber a is mixed to generate a cyclone-type vortex advancing path, and the gas-liquid mixture enters the second chamber B from the first opening 413 arranged at the top of the first chamber a. The mixture introduced into the second chamber B, in which a part of the moisture is collected on the inner side of the middle wall 420 of the second chamber B due to the centrifugal force of the spiral, flows downward along the wall surface of the middle wall 420 under the gravity, and flows into the recovery tub 210 through the second opening 421. The remaining mixture, which also includes a portion of the water vapor, exits the second chamber B through a second opening 421 at the bottom end of the second chamber B and enters the third chamber C. The remaining mixture entering the third chamber C is spirally rotated at a high speed, wherein the liquid part flows downwards along the outer wall 430 of the third chamber C to the collection area 432 under the action of gravity and finally enters the recycling bin 210, so that the liquid in the mixed gas is separated from the mixed gas, temporarily stays at the bottom of the third chamber C, flows into the recycling bin 210 from a third opening 431 arranged at the bottom of the third chamber C for storage, and the clean gas in the mixture enters the gas passage 422 from a mesh 423 at the top of the third chamber C and is discharged to the outside, thereby realizing the complete separation of gas and liquid.

In the technical scheme, the second chamber B is equivalent to a cyclone chamber, a water-vapor mixture enters the first chamber a from the inlet channel 401, under the guiding action of the spiral guiding structure 412, the water-vapor mixture passing through the chamber a is mixed to generate a cyclone-type vortex advancing path, a gas-liquid mixture enters the second chamber B from the first opening 413 arranged at the top of the first chamber a, the second chamber B and the first chamber a are in a nested structure, the spiral guiding structure 412 is positioned in the first chamber a, and the second chamber B is opened downwards, so that the first chamber a not only occupies more space of the second chamber B, but also flows out from the first opening 413 after the airflow forms a rotating airflow by the spiral guiding structure 412 and is then blocked by the top of the second chamber B to move downwards, on one hand, the upward and clockwise rotating force and moving state of the rotating airflow are blocked, on the other hand, the airflow cannot rotate at first near the inner circumferential surface of the cyclone chamber to form cyclone separation and cannot rotate fastest and is closest to the cyclone chamber The inner peripheral surface rotates to form cyclone separation, and the cyclone separation rushes to the top of the second chamber B firstly and enables the airflow to move downwards.

Therefore, in order to form cyclone separation by the airflow firstly rotating close to the inner peripheral surface of the cyclone cavity, form cyclone separation by the airflow rotating closest to the inner peripheral surface of the cyclone cavity and facilitate larger contact between the entering airflow and the inner peripheral surface of the cyclone cavity, the applicant makes a deeper study, breaks through the limitation of the existing thinking, and provides a technical scheme of a centrifugal separation unit, a centrifugal separation structure, a floor washing assembly and a floor washing machine.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a centrifugal separation unit which can enable airflow to rotate close to the inner peripheral surface of a cyclone cavity to form cyclone separation, is favorable for rotating closest to the inner peripheral surface of the cyclone cavity to form cyclone separation, and is favorable for leading the entering airflow to have larger contact with the inner peripheral surface of the cyclone cavity; also provides a centrifugal separation structure, which adopts the centrifugal separation unit; also provides a ground washing assembly which is provided with the centrifugal separation structure; a floor washing machine is also provided, and the floor washing machine is provided with the floor washing assembly.

Compared with the prior art, the invention provides a centrifugal separation unit which comprises a gas inlet, a centrifugal separation cavity and a cyclone, wherein a gas-liquid mixture from the gas inlet enters the centrifugal separation cavity, the centrifugal separation cavity separates gas from liquid by utilizing the rotating centrifugal force of the gas-liquid mixture, and separated gas flow is discharged from a gas outlet.

As the improvement, the whirlwind goes out the air around the cyclone circumference, and the air outlet is one or more, and each air outlet distributes along cyclone circumference and sets up.

As an improvement, an annular interval flow passage is arranged at the bottom inlet of the centrifugal separation cavity, and cyclone blades of the cyclone are arranged in the annular interval flow passage.

As an improvement, the annular interval flow passages are arranged in a diameter-variable mode.

As a refinement, the annular spacing flow channel narrows from wide to narrow in the direction of flow of the gas stream.

As an improvement, the height of each cyclone blade is changed from high to low along with the change of the width and the narrowing of the annular interval flow passage by taking the upper end surface of the cyclone as a reference.

As the improvement, the bottom of the centrifugal separation cavity is connected with a second air inlet pipe, and the second air inlet pipe is used for increasing the distance between the air inlet and the cyclone.

As an improvement, an axial flow channel is arranged at the lower side of the bottom of the centrifugal separation cavity along the axial direction of the centrifugal separation cavity, the axial flow channel is used as a second air inlet pipe, and the air inlet axially conveys the gas-liquid mixture through the axial flow channel.

As an improvement, the centrifugal separation cavity is provided with an air outlet pipe, the air outlet pipe is axially sleeved with the centrifugal separation cavity and used for guiding airflow in the centrifugal separation cavity to the top of the centrifugal separation cavity to be discharged, and the second air inlet pipe, the cyclone and the air outlet pipe are coaxial and are sequentially arranged from bottom to top.

As an improvement, the centrifugal separation cavity is provided with an air outlet pipe, the air outlet pipe is axially sleeved with the centrifugal separation cavity, an inlet of the air outlet pipe is positioned above the bottom of the centrifugal separation cavity, and the air outlet pipe is used for guiding the airflow in the centrifugal separation cavity to the top of the centrifugal separation cavity to be discharged.

As an improvement, a partition part is arranged between an inlet at the bottom of the centrifugal separation cavity and an inlet of the air outlet pipe, and the cyclone is positioned between the inlet at the bottom of the centrifugal separation cavity and the partition part.

As a refinement, the upper end of the cyclone serves as the partition.

As an improvement, the peripheral wall of the centrifugal separation cavity is provided with a collecting chamber, the collecting chamber is provided with a liquid outlet, and the collecting chamber is used for collecting sewage and discharging the sewage into a sewage bucket through the liquid outlet.

As an improvement, the collection chamber is provided with tangential guide surfaces which are tangentially arranged to the rotating circumferential surface of the centrifugal separation chamber.

As an improvement, the collecting chamber is provided with a flow baffle plate, the height of the flow baffle plate is higher than the bottom of the collecting chamber, or the collecting chamber is provided with a flow baffle plate in the whirlwind rotating direction, the height of the flow baffle plate is higher than the bottom of the collecting chamber, the centrifugal separation cavity is provided with an air outlet pipe, the air outlet pipe is axially sleeved with the centrifugal separation cavity, and the height of the flow baffle plate is higher than the air inlet of the air outlet pipe.

As an improvement, the flow baffle is arranged at the cyclone outlet of the collecting chamber and is a constituent part of the rotating circumferential surface of the centrifugal separation cavity.

As an improvement, a liquid outlet of the collection chamber is provided with a one-way valve which is opened towards one side of the sewage bucket in a one-way.

As an improvement, a baffle wall is arranged at an outlet of the centrifugal separation cavity, a flow guide channel is arranged on the baffle wall, the outlet is communicated with the air outlet through the flow guide channel, and the flow guide channel is used for prolonging the circulation distance of the air flow.

As an improvement, the outlet is positioned at the top of the centrifugal separation cavity, and the flow guide channel is arranged between the baffle wall and the top.

After adopting the structure, compared with the prior art, the invention has the following advantages: the cyclone is arranged at the bottom of the centrifugal separation cavity, and guides the airflow flowing in from the bottom of the centrifugal separation cavity into cyclone and guides the cyclone to the inner peripheral surface of the centrifugal separation cavity arranged along the circumferential direction of the bottom, so that the airflow can rotate close to the inner peripheral surface of the cyclone cavity to form cyclone separation and is favorable for rotating fastest and most directly close to the inner peripheral surface of the cyclone cavity to form cyclone separation.

The cyclone is arranged at the bottom of the centrifugal separation cavity, and aims to enable the gas-liquid mixture to do cyclone motion from bottom to top, so that the bottom of the centrifugal separation cavity can be any one of the following conditions, and the cyclone can protrude out of (higher than) the bottom of the specific structure of the centrifugal separation cavity or be sunken in (lower than) the bottom of the specific structure of the centrifugal separation cavity or keep flat the bottom of the specific structure of the centrifugal separation cavity.

Compared with the prior art, the invention also provides a separation structure comprising the centrifugal separation unit.

As a refinement, the separation structure comprises a plurality of separation units, wherein at least one centrifugal separation unit is included.

As a modification, the separation units are disposed in the slop pail and are sequentially disposed along the axial direction of the slop pail.

As an improvement, the separation structure comprises a plurality of stages of separation units which are communicated in sequence, and the final stage adopts a centrifugal separation unit.

As a modification, the separation structure includes a first separation unit as a preceding stage separation unit and a second separation unit as a succeeding stage separation unit; the first separation unit adopts a separation cover structure, and the second separation unit adopts a centrifugal separation structure; the first separation unit comprises a separation cover and a first air inlet pipe which are distributed up and down, and the first air inlet pipe is used for inputting a preceding stage gas-liquid mixture; the second separation unit comprises a centrifugal separation cavity and a second air inlet pipe which are distributed up and down, the air inlet end of the second air inlet pipe is positioned above the separation cover, the air outlet end of the second air inlet pipe is positioned in the centrifugal separation cavity, or the second separation unit comprises the centrifugal separation cavity and the air inlet end of the centrifugal separation cavity, and the centrifugal separation cavity is positioned above the separation cover.

As an improvement, part or all of the centrifugal separation unit is positioned in the sewage bucket, the gas-liquid mixture sequentially passes through the sewage bucket and the centrifugal separation unit, and the gas flow separated by the centrifugal separation chamber is discharged from the gas outlet of the centrifugal separation unit, or the gas-liquid mixture directly passes through the centrifugal separation unit and the gas flow separated by the centrifugal separation chamber is discharged from the gas outlet of the centrifugal separation unit.

As an improvement, the first separation unit and the second separation unit are distributed upwards along the axial direction of the slop pail, the first air inlet pipe extends upwards from the bottom of the slop pail along the axial direction of the slop pail, an annular space formed between the first air inlet pipe and the slop pail serves as a liquid storage cavity, sewage separated by the first separation unit and the second separation unit is finally discharged into the liquid storage cavity, the gas-liquid mixture sequentially passes through the first air inlet pipe, the separation cover, the slop pail, the second air inlet pipe and the centrifugal separation cavity, and the gas flow separated by the centrifugal separation cavity is discharged from the gas outlet of the centrifugal separation unit, or the gas-liquid mixture sequentially passes through the first air inlet pipe, the separation cover, the slop pail and the centrifugal separation cavity, and the gas flow separated by the centrifugal separation cavity is discharged from the gas outlet of the centrifugal separation unit.

After adopting the structure, compared with the prior art, the invention has the following advantages: adopt centrifugal separation unit, on the one hand put forward a neotype isolating construction, on the other hand, centers on the isolating construction that centrifugal separation unit founded, can improve compact structure degree, in addition, accomplish compact structure simultaneously, still be favorable to founding the isolating construction that the separation effect is better.

Compared with the prior art, the invention further provides a floor washing assembly which comprises a cleaning part and a support, wherein the cleaning part is connected with the support, the cleaning part is communicated and connected with the separating structure through a first flow passage, the separating structure is connected with the support, the support is provided with a second flow passage, the separating structure is communicated and connected with the second flow passage, and the second flow passage is used for being communicated and connected with a suction source.

As an improvement, the cleaning device also comprises a clean water barrel, a third flow passage is arranged between the clean water barrel and the cleaning part, the third flow passage is used for conveying water in the clean water barrel to the cleaning part for use, and the third flow passage is provided with a water shortage detection sensor.

As an improvement, the floor washing assembly is used as a functional assembly of the dust collector and is detachably connected with the dust collector, wherein the bracket is provided with a detachable connecting structure detachably connected with the dust collector, and the detachable connecting structure enables the second flow passage to be detachably communicated and connected with the dust collector.

After adopting the structure, compared with the prior art, the invention has the following advantages: adopt the isolating construction, on the one hand put forward a neotype subassembly of washing ground, on the other hand, centers on the isolating construction establish wash ground subassembly, can improve compact structure degree, in addition, accomplish compact structure simultaneously, still be favorable to establishing the better subassembly of washing ground of separation effect.

Compared with the prior art, the invention also provides a floor washing machine which comprises a suction source, wherein the suction source is connected with the floor washing assembly.

As an improvement, the suction source adopts a handheld dust collector which is detachably connected with the floor washing assembly.

After adopting the structure, compared with the prior art, the invention has the following advantages: the novel floor scrubber is proposed on the one hand, on the other hand centers on the floor scrubber that the floor scrubber subassembly found, can improve compact structure degree, in addition, accomplish compact structure simultaneously, still be favorable to constructing the better floor scrubber of separation effect.

Drawings

FIG. 1 is a perspective view of a separation structure according to the present invention.

Fig. 2 is a perspective view of the upper part of the slop pail (shown with a separate cover and float mechanism).

Figure 3 is a perspective view of the lower portion of the slop pail (with the separating hood and float mechanism removed).

Fig. 4 is a perspective view of the peripheral wall with the upper portion of fig. 2 removed.

Fig. 5 is a perspective view of the top view of fig. 4.

Fig. 6 is a perspective view mainly showing a related structure in the centrifugal separation chamber.

Fig. 7 is a second perspective view mainly showing the related structure in the centrifugal separation chamber.

Fig. 8 is a perspective view mainly showing the blocking wall.

Fig. 9 is a schematic perspective view of the inside of the centrifugal separation chamber.

Fig. 10 is a perspective view of a floor washing assembly.

Fig. 11 is a perspective view of fig. 10 with the cover removed.

FIG. 12 is a cross-sectional view of the floor scrubbing assembly.

Fig. 13 is a partially enlarged schematic view of fig. 12 mainly showing a separation structure.

Fig. 14 is a perspective view of the suction source using the main body of the hand-held cleaner.

FIG. 15 is a schematic cross-sectional view of another centrifugal separation configuration.

The reference numbers indicate that 1-a sewage bucket, 1.1-an upper part, 1.2-a lower part, 2-a separation cover, 3-a first air inlet pipe, 4-a centrifugal separation cavity, 4.1-a collection chamber, 4.2-a one-way valve, 4.3-a tangential guide surface, 5-a second air inlet pipe, 6-an air inlet end, 7-an air outlet end, 8-a floating mechanism, 9-a top part, 10-a first flow passage, 11-a second flow passage, 12-a third flow passage, 13-a cleaning part, 14-a bracket, 15-a rear cover, 16-a water pump, 17-a water shortage detection sensor, 18-a plug pipe, 19-a button, 20-a clamping bulge, 21-an electric connection terminal, 22-a clear water bucket, 23-an air humidity detection sensor, 24-an exhaust pipe, 25-air outlet, 26-air inlet, 27-handheld cleaner host, 28-top cover, 29-baffle, 30-diversion side wall, 31-air outlet pipe, 32-cyclone, 33-diversion channel, 34-baffle plate, 35-guiding structure, 36-plug suction port, 37-isolation cover, 38-tangential hole and 39-annular cavity.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

The invention is described in further detail below:

the first embodiment is as follows:

the first embodiment is a floor washing assembly, which comprises a wet mop cleaning part 13 and a support 14, wherein the wet mop cleaning part 13 is connected with the support 14, the wet mop cleaning part 13 is communicated and connected with a gas-liquid separation structure through a first flow passage 10, the gas-liquid separation structure is connected with the support 14, the support 14 is provided with a second flow passage 11, the gas-liquid separation structure is communicated and connected with the second flow passage 11, and the second flow passage 11 is used for being communicated and connected with a suction source.

As shown in fig. 11, 12 and 13, the wet mop cleaning part 13 adopts a rolling brush structure, when cleaning the floor, the rolling brush structure is used for mopping the floor, on the other hand, the suction source sucks in dirt through the flow channel, and if water exists on the floor, the gas-liquid mixture is sucked, or when the wet mop cleaning part 13 is the wet mop cleaning part 13 which is wetted, and the wet mop cleaning part 13 is pressed by the scraper, so that the scraper extrudes the dirt while mopping the floor, and when the suction source sucks the gas-liquid mixture.

In order to continuously wet the wet mop cleaning part 13, the wet mop cleaning part 13 is circumferentially provided with water injection nozzles, the water injection nozzles are connected with a clean water barrel 22 through a third flow channel 12, and in this example, the clean water barrel 22 is coaxially arranged with the gas-liquid separation structure and is positioned above the gas-liquid separation structure.

The water delivery hose is provided with a water shortage detection sensor 17 which can detect in a non-contact manner with water, the water shortage detection sensor 17 detects whether water flows through or not, for example, a capacitive sensor is arranged at the rear end of the water shortage detection sensor 17, the water pump 16 is arranged at the rear end of the water shortage detection sensor 17, and signals obtained through detection of the water shortage detection sensor 17 can enable the wet mop cleaning part 13 and the suction source to stop working in time or prompt a user of information such as water shortage, water addition and water existence.

The water shortage detection sensor 17 is arranged in the third flow channel 12 and is not arranged in the clean water barrel 22, when the clean water barrel 22 supplies water to the wet mop cleaning part 13, once the position of the water shortage detection sensor 17 of the third flow channel 12 does not allow water to flow, the water shortage detection sensor 17 detects that no water flows and generates a signal, a control module of the floor washing machine judges that no water flows and stops the machine according to the set water-free time delay or immediately judges that no water flows and stops the machine, by utilizing the signal, the control module of the floor washing machine can be arranged to remind a user, the reminding means can be means such as sound and light alarm, and the like, because the third flow channel 12 judges whether water exists, on one hand, the judgment on the water condition is more accurate, the water in the clean water barrel 22 can be used as much as possible, that is to say, when no water is detected, the water in the clean water barrel 22 basically does not exist, and the water in the clean water barrel 22 basically does not remain, and the detection is more stable, on the other hand, before there is no water completely, the control module of the floor washing machine can stop and stop the water spray of the cleaning water spray hole in time according to the signal of no water, so at least two advantages are provided, one advantage is that when the floor washing machine is used for mopping, the wet mopping cleaning part can stop working, at this moment, the wet mopping cleaning part is not dirty due to the fact that the wet mopping cleaning part is supplied by a little clear water in the water delivery hose, therefore, after the floor is stopped in time, the floor can not be dirty, cleaning is facilitated, and the other advantage is that when there is no water, the water in the cleaning water spray hole is about to be sprayed out, so that the floor washing machine can be reminded in time, the cleaning water bucket 22 is washed after being filled with water, and the cleaning efficiency can be improved.

The water hose, the water pump 16 and the water shortage detection sensor 17 are mainly arranged in the rear cover 15 of the bracket 14, so that the production and the manufacture are convenient on one hand, and the overall appearance of the floor washing assembly is designed on the other hand.

The power for rotating the wet mop cleaning part 13 can be supplied by a self-contained battery or a suction source.

The gas-liquid separation structure and/or the second flow channel 11 is provided with a gas humidity detection sensor 23, and the gas humidity detection sensor 23 is used for providing an air flow humidity signal to a control module of the scrubber.

The gas-liquid separation structure comprises one or more separation units, and in the embodiment, the gas-liquid separation structure comprises two separation units, namely a first separation unit and a second separation unit.

As shown in fig. 1 and 5, the exhaust pipe 24 communicated with the gas outlet 25 of the last stage of separation unit is provided with a gas humidity detection sensor 23, and the gas humidity detection sensor 23 is arranged close to one side of the separation unit, namely close to one side of the gas outlet of the gas-liquid separation structure, so that the gas humidity detection sensor can be found out as early as possible when being arranged close to one side of the separation unit, thereby stopping the suction source in time and being more beneficial to protecting the suction source.

The exhaust duct 24 is mainly used for connection to a suction source, and only the lower end of the exhaust duct 24 is illustrated in fig. 1 to 9 for illustration, and the length of the exhaust duct 24 is designed as necessary, so that the gas humidity detection sensor 23 can be disposed along the exhaust duct 24.

The floor washing assembly is used as a functional assembly of the dust collector and is detachably connected with the dust collector, wherein the bracket 14 is provided with a detachable connecting structure detachably connected with the dust collector, and the detachable connecting structure enables the second flow passage 11 to be detachably communicated with the dust collector.

Removable connection include the grafting pipe 18, button 19, joint arch 20, as shown in fig. 14, to peg graft pipe 18 and handheld dust catcher host 27 the grafting suction inlet 36 plug-in connection, when inserting, joint arch 20 can be pushed down by grafting suction inlet 36 internal surface, peg graft pipe 18 can insert smoothly in the grafting suction inlet 36, be equipped with in the grafting suction inlet 36 with the protruding 20 complex of joint sunken, when the grafting of grafting pipe 18 targets in place, then joint arch 20 realizes the locking with sunken cooperation, under the condition of not pressing button 19, peg graft pipe 18 and the unable alternate segregation of grafting suction inlet 36, button 19 is connected with joint arch 20, when pressing button 19, then can drive joint arch 20 withdrawal, thereby realize joint arch 20 and sunken alternate segregation. The structure realizes reliable detachable connection of the floor cleaning assembly and the handheld dust collector main body 27 on one hand, and realizes communication connection between the second flow passage 11 and the suction source on the other hand, so that the handheld dust collector main body 27 is used as the suction source.

In order to realize the power supply and control by the hand-held cleaner main body 27, the ground washing assembly is also provided with an electric connecting terminal 21, when the inserting pipe 18 is inserted and connected with the inserting suction port 36, the electric connecting terminal 21 is electrically connected with the hand-held cleaner main body 27 and a control signal circuit, so that on one hand, the power supply is carried out on the power consumption part of the ground washing assembly, and on the other hand, the power consumption part can be controlled by the hand-held cleaner main body 27, such as the wet mop cleaning part 13, the water pump 16, various sensors and the like.

Example two:

the second embodiment is a floor washing machine, and the subassembly that washes the ground can be split with the suction source, and in order to adapt the dust catcher as the suction source better, the gas-liquid separation structure is provided with a plurality of separation units to set up gas humidity and detect sensor 23, thereby realize the purpose of dust catcher as the suction source, such floor washing machine can promote better, has solved the problem that needs configuration suction source specially, has reduced the threshold of purchase and use, has the significance.

In this example, as shown in figure 14, the suction source is a hand-held cleaner main body 27, providing a floor-washing function of the hand-held cleaner.

For the gas-liquid separation structure, the gas-liquid separation structure is well designed, so that not only is gas-liquid separation facilitated, but also the effectiveness and the reliability of detection of the gas humidity detection sensor are facilitated.

As shown in fig. 1, a schematic perspective view of a gas-liquid separation structure is disclosed, which includes a slop pail 1 and two or more separation units, the airflow channels of the separation units are sequentially communicated, and the sewage separated by the separation units is discharged into the slop pail 1.

In this example, adopt the design of a slop pail 1, be equipped with two separating element in this slop pail 1, can realize like this that the separation is effectual, can also control the size of structure better simultaneously, in addition, adopt the design of a slop pail 1, be favorable to the dismouting to clear up, convenience of customers uses. Of course, more than two separate units are possible, and the slop pail 1 may be more than one.

As shown in fig. 13, two separation units, namely a first separation unit and a second separation unit, are arranged in the slop pail 1, the first separation unit adopts a separation cover structure, and the second separation unit adopts a centrifugal separation structure; the first separation unit comprises a separation cover 2 and a first air inlet pipe 3 which are distributed up and down, and the first air inlet pipe 3 is used for inputting a front-stage gas-liquid mixture; in this example, the second separation unit includes a centrifugal separation chamber 4 and a second air inlet pipe 5 which are distributed up and down, an air inlet end 6 of the second air inlet pipe 5 is located above the separation cover 2, an air outlet end 7 of the second air inlet pipe 5 is located in the centrifugal separation chamber 4, other structures are also possible, for example, the second air inlet pipe 5 is eliminated, the second separation unit includes the centrifugal separation chamber 4 and the air inlet end 6 arranged in the centrifugal separation chamber 4, and the centrifugal separation chamber 4 is located above the separation cover 2. By adopting the combination of the first separation unit and the second separation unit, the separation effect can be further optimized, and the size of the structure can be further controlled.

As shown in fig. 2, 3, 4 and 13, the first separating unit and the second separating unit are coaxially disposed, and in this example, specifically, the second separating unit and the first separating unit are vertically disposed in the axial direction of the slop pail 1, the first separating unit is a front stage separating unit, and the second separating unit is a rear stage separating unit. Thus, the separation effect can be further optimized compared to the aforementioned structure, and the size of the structure can be further controlled.

As shown in fig. 2, the separation cover 2 is connected to a floating mechanism 8, the floating mechanism 8 is used for driving the separation cover 2 to move up and down according to the sewage level, the top 9 of the separation cover 2 is used for closing/opening the air inlet end 6 of the second air inlet pipe 5 according to the sewage level, when the sewage reaches a certain height, the top 9 of the separation cover 2 moves up to the position where the air inlet end 6 of the second air inlet pipe 5 is closed, so that the sewage is prevented from being sucked into the second air inlet pipe 5 due to continuous work, and a suction source is sucked, and the height is defined as the height that the sewage is full, and the sewage needs to be poured for use. To guide the movement of the separating hood 2, a guiding structure 35 is also attached to the separating hood 2, which guiding structure 35 is in guiding engagement with the inner surface of the sewage bucket 1. The guide structure 35 and the floating mechanism 8 can adopt various structures, wherein the guide structure 35 is a guide plate, and the floating mechanism 8 is a floater structure.

As shown in fig. 1, 2 and 3, the slop pail 1 includes upper and lower parts, which are detachably connected, respectively an upper part 1.1 and a lower part 1.2, and between the upper and lower parts, separate units are accommodated, so that the user can clean the inside of the slop pail 1 more conveniently. Further, the upper part 1.1 is provided with a rear separating unit, which is connected to the upper part 1.1 and can be removed from the keg 1 together with the upper part 1.1, thus further facilitating the user to clean the interior of the keg 1 and the separating units.

The detachable connection in this case is very convenient by the rotary clamping at the connection end between the upper part 1.1 and the lower part 1.2.

As shown in fig. 1, 2, 3 and 13, the separating hood structure includes an air inlet 26 and a separating hood 2, the gas-liquid mixture from the air inlet 26 enters the slop pail 1 through the air outlet end 7 of the first air inlet pipe 3, and due to the blocking of the separating hood 2, the separating hood 2 changes the direction of the gas-liquid mixture by its blocking effect, in this case, the direction is changed downwards, so that most of the sewage is left in the slop pail 1, and the air flow bypasses the separating hood 2 and continues to go upwards due to the suction of the suction source, thereby realizing a certain gas-liquid separation.

As shown in fig. 4, 5, 6, 7, 8, 9, 13, the centrifugal separation structure comprises a gas inlet 26 and a centrifugal separation chamber 4, which, in this case, the gas inlet end 6 of the second gas inlet pipe 5 is the gas inlet 26, the gas-liquid mixture from the gas inlet 26 enters the centrifugal separation chamber 4 through the gas outlet end 7 of the second gas inlet pipe 5, the centrifugal separation chamber 4 separates gas from liquid by the centrifugal force of the rotation of the gas-liquid mixture, in this example, in order to create centrifugal rotation, the centrifugal separation chamber 4 is provided with a cyclone 32 at the outlet end 7 of the second inlet duct 5, namely, the cyclone 32 is arranged at the bottom of the centrifugal separation chamber, the gas-liquid mixture passes through the cyclone 32 and then enters the centrifugal separation chamber 4, the cyclone guides the airflow flowing in from the bottom of the centrifugal separation cavity to form cyclone, and guides the cyclone to the inner peripheral surface of the centrifugal separation cavity arranged along the circumferential direction of the bottom, thereby realizing centrifugal separation. Referring to fig. 6, 7 and 13, it can be seen that the cyclone 32 is provided with a circle of cyclone blades, the adjacent cyclone blades form a cyclone flow channel, and the plurality of adjacent cyclone blades are provided with a plurality of cyclone flow channels, which result in a plurality of cyclone outlets, the cyclone outlets are distributed around the circumference of the cyclone, the cyclone is discharged into the centrifugal separation chamber 4 from the circumference of the cyclone 32, and the cyclone outlets of the cyclone 32 face the inner circumferential surface of the centrifugal separation chamber 4, so that the cyclone can reach the inner circumferential surface of the centrifugal separation chamber 4 better, and then can rapidly rotate upwards along the inner circumferential surface. From the foregoing, the present invention can be designed to discharge air circumferentially around the cyclone 32, which is more advantageous to stronger cyclone than the prior art, and in addition, the air flow is circumferentially distributed to the inner circumferential surface of the centrifugal separation chamber 4, which is more advantageous to larger contact area.

The bottom inlet of the centrifugal separation chamber 4 is provided with an annular interval flow passage, and the cyclone blades of the cyclone 32 are arranged in the annular interval flow passage, so that the gas-liquid mixture can flow to the circumferential direction of the cyclone 32.

The annular spacing flow passage is arranged in a variable diameter mode, for example, the annular spacing flow passage is narrowed from wide to narrow in the airflow flowing direction, so that stronger cyclone is formed.

The upper end surface of the cyclone 32 is used as a reference, and the height of each cyclone blade is changed from high to low along with the change of the width of the annular interval flow channel, so that the structure is simple and compact, the diameter-changing arrangement of the annular interval flow channel is favorably realized, and the airflow is guided well.

As can be seen from fig. 13, the second air inlet pipe 5 increases the distance between the air inlet and the cyclone, that is, the distance between the air inlet end 6 of the second air inlet pipe 5 and the cyclone, and such a design is advantageous for accelerating the cyclone, and in addition, makes it difficult for the sewage that has been left in the slop pail 1 to pass into the cyclone again or further into the centrifugal separation chamber 4.

The separating part is arranged between the inlet at the bottom of the centrifugal separation cavity and the inlet of the air outlet pipe 31, and the cyclone is positioned between the inlet at the bottom of the centrifugal separation cavity and the separating part, so that on one hand, the gas-liquid mixture cannot directly flow into the air outlet pipe 31, on the other hand, the gas-liquid mixture can enter the air outlet pipe 31 after cyclone separation is carried out in the centrifugal separation cavity 4 as much as possible, and the separation efficiency is further improved.

As shown in fig. 9 and 13, the peripheral wall of the centrifugal separation chamber 4 is provided with a collection chamber 4.1, the collection chamber 4.1 is provided with a liquid outlet, and the collection chamber 4.1 is used for collecting sewage and discharging the sewage into the sewage bucket 1 through the liquid outlet, so that better separation can be realized and the sewage can be discharged to the sewage bucket 1. Furthermore, as shown in fig. 9, the collecting chamber 4.1 is provided with a tangential guide surface 4.3 which is tangentially arranged to the circumferential surface of rotation, so that the separated waste water can better enter the collecting chamber 4.1, thereby achieving better separation effect. Furthermore, as shown in fig. 6, 7 and 13, the air outlet pipe 31 is arranged in the centrifugal separation cavity 4, and the air outlet pipe 31 is axially sleeved with the centrifugal separation cavity 4, so that air flow formed by the air outlet pipe 31 flows upwards and downwards from the air outlet pipe 31, the separated sewage is favorably kept in the centrifugal separation cavity 4, and meanwhile, the rotating air flow has enough time to separate and cannot be directly discharged. That is, the cyclone first rotates upward along the inner circumferential surface of the centrifugal separation chamber 4, then reaches the top, then moves downward along the outlet pipe 31 and enters the outlet pipe 31, so that an orderly flow is formed, and the mutual influence of the air flows is reduced, thereby improving the separation effect. Furthermore, as shown in fig. 13, the collecting chamber 4.1 is provided with a baffle plate 34, and the height of the baffle plate 34 is higher than the bottom of the collecting chamber 4.1, so that the rotating airflow entering the collecting chamber 4.1 can be blocked to facilitate the separation of the sewage and remain in the collecting chamber 4.1. Furthermore, as shown in fig. 13, the collecting chamber 4.1 is provided with a flow baffle 34, in this example, the flow baffle 34 is arranged at the cyclone outlet of the collecting chamber 4.1, the height of the flow baffle 34 is higher than the bottom of the collecting chamber 4.1, the centrifugal separation chamber 4 is provided with an air outlet pipe 31, the air outlet pipe 31 is axially sleeved with the centrifugal separation chamber 4, and the height of the flow baffle 34 is higher than the air inlet 26 of the air outlet pipe 31, so that the rotating airflow entering the collecting chamber 4.1 can be blocked to a certain extent, which is beneficial to separating the sewage and leaving the sewage in the collecting chamber 4.1, and meanwhile, the separated sewage is not easy to enter the air outlet pipe 31 again, thereby ensuring the separation performance.

The liquid outlet of the collection chamber 4.1 is provided with a one-way valve 4.2, which is beneficial to preventing the airflow in the sewage bucket 1 from flowing into the centrifugal separation chamber 4 through the sewage outlet.

In this example, the basic structure of the centrifugal separation chamber 4 includes a body and a top cover 28, the lower end of the body is connected with the second air inlet pipe 5, and the top cover 28 closes the upper end opening of the body, that is, fig. 6 is connected with the upper body and the second air inlet pipe 5, which is shown in fig. 4.

In this example, the flow guide passage 33 is provided only in the last stage separation unit, but is not limited to this example.

The specific structure of the flow guide channel 33 arranged in the last stage of separation unit is as follows: the top cap 28 upside still is connected with baffle 29, and baffle 29 and top cap 28 are equipped with water conservancy diversion passageway 33, and the lower surface of baffle 29 keeps off the wall promptly, and top cap 28 is equipped with the through-hole as air current channel, and this air current channel's export is for keeping off the wall, keeps off the wall and is equipped with water conservancy diversion passageway 33, export through water conservancy diversion passageway 33 and discharge port intercommunication, the discharge port is connected with blast pipe 24, is equipped with gaseous humidity detection sensor 23 in the blast pipe 24, and gaseous humidity detection sensor 23 is located the rear side of water conservancy diversion passageway 33 promptly, and this water conservancy diversion passageway 33 is used for prolonging the circulation distance of air current, plays certain cushioning effect to the air current, is favorable to preventing sewage entering, and like this, is favorable to protecting the suction source, and in addition, cushioning effect still is favorable to gaseous humidity detection sensor 23 and exerts the performance, realizes more effectual detection. The flow guide channel 33 comprises a flow guide side wall 30, in this case the flow guide side wall 30 divides the flow guide channel 33 into two channels and discharges the air flow through the two air outlets 25.

The structure for storing the sewage separated in the centrifugal separation chamber 4 is not limited to the structure of the collecting chamber 4.1, for example, fig. 15 shows another centrifugal separation structure, the bottom of the centrifugal separation chamber 4 of which is provided with an upward bulge, the upward bulge is provided with an inlet, the inlet is provided with a cyclone 32, in this case, the upward bulge is a part of the second air inlet pipe 5, so as to simplify the structure of the centrifugal separation chamber 4, and specifically, the upward bulge is a part of the second air inlet pipe 5 which is inserted into the centrifugal separation chamber 4 and is higher than the bottom of the specific structure of the centrifugal separation chamber 4. In addition, the centrifugal separation structure comprises a shell and a separation cover 37, the shell and the separation cover 37 are sleeved and arranged along the axial direction of the shell, thereby dividing the shell into an inner chamber and an outer chamber, wherein the chamber at the inner side of the isolation cover 37 is used as a centrifugal separation chamber 4, the annular chamber 39 at the outer side of the isolation cover is used as a storage structure, the circumferential wall of the isolation cover 37 is provided with a plurality of tangential holes 38, in this example, the tangential holes 38 are provided with a plurality of, and is circumferentially arranged along the cage 37, the tangential holes 38 being used to let the contaminated water separated in the centrifugal separation chamber 4 pass from the tangential holes 38 into the annular chamber 39, so that a better separation is achieved, i.e. the sewage is not easily rewound by the cyclone and carried away, by the separation action of the separating hood 37, the directional arrows in the figure being primarily a general flow direction of the airflow, however, the downward arrows in the annular chamber 39 are intended to illustrate that the separated sewage flows down the annular chamber 39 after entering the tangential holes 38. The problem of cleaning the sewage in the annular chamber 39 can be solved by providing an openable valve at the bottom of the annular chamber 39, and the sewage flows into the slop pail 1 by opening the valve. Of course, other suitable storage structures are also possible, all of which meet the requirements of the solution according to the invention, the main reason for designing the collecting chamber 4.1 being that a better separation effect can be obtained.

The electric structures of the water pump 16, the sensors, the wet mop cleaning part 13 and the like adopt conventional structures, and the detailed description is omitted. In understanding the present invention, the above structure may be understood with reference to other drawings, if desired.

The foregoing is illustrative of the present invention and all such equivalent changes and modifications in the structure, features and principles described herein are intended to be included within the scope of this invention.

Claims

1. The utility model provides a centrifugal separation unit, includes air inlet and centrifugal separation chamber, and the gas-liquid mixture that the air inlet was come gets into the centrifugal separation chamber, and the centrifugal separation chamber utilizes the rotatory centrifugal force of gas-liquid mixture with gas-liquid separation, and the air current after the separation is discharged from the gas outlet, its characterized in that still includes the cyclone, and the bottom in centrifugal separation chamber is located to this cyclone, and this cyclone will form whirlwind from the air current water conservancy diversion that the bottom in centrifugal separation chamber flowed into to follow the whirlwind direction the centrifugal separation intracavity global that sets up of circumference of bottom.

2. The centrifugal separation unit of claim 1, wherein the cyclone blows air circumferentially around the cyclone, the number of outlets is one or more, and each outlet is distributed circumferentially around the cyclone.

3. A centrifugal separation unit according to claim 1 wherein the bottom inlet of the centrifugal separation chamber is provided with an annular spaced flow passage in which the cyclone blades of the cyclone are disposed.

4. A centrifugal separation unit as claimed in claim 3 wherein the annular spacer flow passages are tapered.

5. The centrifugal separation unit of claim 4 wherein the annular spacing flow passage narrows from wide to narrow in the direction of gas flow.

6. The centrifugal separation unit of claim 5 wherein the height of each cyclone blade varies from high to low as the annular spaced flow path varies from wide to narrow, based on the upper end surface of the cyclone.

7. A centrifugal separation unit according to claim 1 or 2 or 3 or 5 wherein a second inlet duct is connected to the bottom of the centrifugal separation chamber, the second inlet duct being adapted to increase the distance between the inlet opening and the cyclone.

8. The centrifugal separation unit according to claim 7, wherein the lower side of the bottom of the centrifugal separation chamber is provided with an axial flow passage arranged in the axial direction of the centrifugal separation chamber, the axial flow passage serving as the second gas inlet pipe, and the gas inlet port axially conveys the gas-liquid mixture through the axial flow passage.

9. The centrifugal separation unit of claim 7, wherein the centrifugal separation chamber is provided with an air outlet pipe, the air outlet pipe is axially sleeved with the centrifugal separation chamber and used for guiding the airflow in the centrifugal separation chamber to the top of the centrifugal separation chamber to be discharged, and the second air inlet pipe, the cyclone and the air outlet pipe are coaxial and are sequentially arranged from bottom to top.

10. The centrifugal separation unit of claim 1 or 3, wherein the centrifugal separation chamber is provided with an air outlet pipe, the air outlet pipe is axially sleeved with the centrifugal separation chamber, an inlet of the air outlet pipe is positioned above the bottom of the centrifugal separation chamber, and the air outlet pipe is used for guiding the airflow in the centrifugal separation chamber to the top of the centrifugal separation chamber to be discharged.

11. The centrifugal separation unit of claim 10, wherein a partition is provided between the inlet of the bottom of the centrifugal separation chamber and the inlet of the air outlet duct, and the cyclone is located between the inlet of the bottom of the centrifugal separation chamber and the partition.

12. A centrifugal separation unit according to claim 11 wherein the upper end of the cyclone acts as a partition.

13. The centrifugal separation unit of claim 1 wherein the peripheral wall of the centrifugal separation chamber is provided with a collection chamber, the collection chamber being provided with a drain, the collection chamber being adapted to collect and drain contaminated water into the sump through the drain.

14. The centrifugal separation unit of claim 13 wherein the collection chamber is provided with tangential guide surfaces designed tangentially to the circumferential plane of rotation of the centrifugal separation chamber.

15. The centrifugal separation unit of claim 13 wherein the collection chamber has a baffle plate that is higher than the bottom of the collection chamber, or wherein the collection chamber has a baffle plate in the direction of the cyclone that is higher than the bottom of the collection chamber, and wherein the centrifugal separation chamber has an outlet tube that is axially nested with the centrifugal separation chamber, the baffle plate having a height that is higher than the inlet of the outlet tube.

16. The centrifugal separation unit of claim 15 wherein a baffle is provided at the cyclone outlet of the collection chamber, and the baffle is an integral part of the rotating circumferential surface of the centrifugal separation chamber.

17. A centrifugal separation unit according to claim 13 or 14 or 15 or 16 wherein the discharge port of the collection chamber is provided with a one-way valve which opens in one direction to the side of the slop pail.

18. A centrifugal separation unit according to claim 1 or 3 wherein the outlet of the centrifugal separation chamber is provided with a baffle wall provided with a flow directing channel, said outlet communicating with the air outlet via the flow directing channel, the flow directing channel being adapted to extend the distance of flow of the air stream.

19. A centrifugal separation unit according to claim 18 wherein the outlet is located at the top of the centrifugal separation chamber, the baffle wall and the top defining said flow directing passage therebetween.

20. A separation structure using the centrifugal separation unit according to any one of claims 1 to 19, comprising the centrifugal separation unit.

21. The separation structure of claim 20, wherein the separation structure comprises a plurality of separation units, including at least one centrifugal separation unit.

22. The separation structure of claim 21, wherein the separation units are provided in the slop pail and are arranged in sequence in an axial direction of the slop pail.

23. The separation structure of claim 21 wherein the separation structure comprises a plurality of sequentially connected separation units, the last stage employing a centrifugal separation unit.

24. The separation structure according to claim 23, wherein the separation structure comprises a first separation unit as a preceding stage separation unit and a second separation unit as a succeeding stage separation unit; the first separation unit adopts a separation cover structure, and the second separation unit adopts a centrifugal separation structure; the first separation unit comprises a separation cover and a first air inlet pipe which are distributed up and down, and the first air inlet pipe is used for inputting a preceding stage gas-liquid mixture; the second separation unit comprises a centrifugal separation cavity and a second air inlet pipe which are distributed from top to bottom, the air inlet end of the second air inlet pipe is positioned above the separation cover, the air outlet end of the second air inlet pipe is positioned in the centrifugal separation cavity, or the second separation unit comprises the centrifugal separation cavity and the air inlet end of the centrifugal separation cavity, and the centrifugal separation cavity is positioned above the separation cover.

25. The separation structure according to any one of claims 20 to 24, wherein part or all of the centrifugal separation unit is located in the slop pail, and the gas-liquid mixture passes through the slop pail, the centrifugal separation unit in sequence, and the gas flow separated by the centrifugal separation chamber is discharged from the gas outlet of the centrifugal separation unit, or the gas-liquid mixture passes directly through the centrifugal separation unit, and the gas flow separated by the centrifugal separation chamber is discharged from the gas outlet of the centrifugal separation unit.

26. The separation structure of claim 25, wherein the first separation unit and the second separation unit are distributed upward and downward along the axis of the slop pail, the first air inlet pipe extends upward from the bottom of the slop pail along the axis of the slop pail, an annular space formed between the first air inlet pipe and the slop pail serves as a liquid storage chamber, the sewage separated by the first separation unit and the second separation unit is finally discharged into the liquid storage chamber, the gas-liquid mixture sequentially passes through the first air inlet pipe, the separation cover, the slop pail, the second air inlet pipe and the centrifugal separation chamber, and the gas flow separated by the centrifugal separation chamber is discharged from the gas outlet of the centrifugal separation unit, or the gas-liquid mixture sequentially passes through the first air inlet pipe, the separation cover, the slop pail and the centrifugal separation chamber, and the gas flow separated by the centrifugal separation chamber is discharged from the gas outlet of the centrifugal separation unit.

27. A floor washing assembly incorporating a separating structure according to any one of claims 20 to 26 comprising a cleaning portion and a support, wherein the cleaning portion is connected to the support, the cleaning portion being in communication with the separating structure via a first flow passage, the separating structure being connected to the support, the support being provided with a second flow passage, the separating structure being in communication with the second flow passage, the second flow passage being adapted for communication with a suction source.

28. The floor washing assembly according to claim 27, further comprising a clean water tub, wherein a third flow passage is provided between the clean water tub and the cleaning part, the third flow passage is used for conveying water in the clean water tub to the cleaning part, and the third flow passage is provided with a water shortage detection sensor.

29. The floor cleaning assembly of claim 28, wherein the floor cleaning assembly is a functional assembly of a vacuum cleaner and is detachably connected to the vacuum cleaner, wherein the bracket is provided with a detachable connection structure detachably connected to the vacuum cleaner, and the detachable connection structure enables a detachable communication connection between the second flow passage and the vacuum cleaner.

30. A floor washing machine incorporating a floor washing assembly according to any of claims 27 to 29 and including a suction source, wherein the suction source is connected to the floor washing assembly.

31. The floor washing machine of claim 30, wherein the suction source is a hand-held cleaner that is removably coupled to the floor washing assembly.