CN114947641B

CN114947641B - Surface cleaning equipment

Info

Publication number: CN114947641B
Application number: CN202210626841.8A
Authority: CN
Inventors: 戴逢焱
Original assignee: Suzhou Simple Youwei Technology Co Ltd
Current assignee: Suzhou Simple Youwei Technology Co Ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2023-05-09
Anticipated expiration: 2041-08-23
Also published as: CN113455975A; CN114947641A; CN113455975B

Abstract

The surface cleaning apparatus provided by the invention comprises a dirt recovery system for recovering dirt from a surface to be cleaned, and comprises a recovery tank for recovering dirt, wherein the recovery tank comprises a body, an air inlet pipe and a filter, and a storage space for storing the dirt is limited in the body. The air inlet pipe is at least partially arranged in the storage space. The filter is arranged on the body and is positioned above the warning water level. The separation plate is arranged above the filter, one side of the separation plate is a gas-liquid separation zone, the other side of the separation plate is a gas circulation zone, dirty suction airflow is carried into the gas-liquid separation zone through the air inlet pipe and then subjected to gas-liquid separation, and the gas after gas-liquid separation is discharged out of the storage space after flowing through the gas circulation zone. By adopting the structure, the filter can effectively prevent liquid from splashing to the gas circulation area, avoid water vapor to be carried to the outlet of the recovery box by the filtered gas, and effectively reduce the water vapor amount in the gas.

Description

Surface cleaning equipment

The present application is a divisional application of patent application with application number 2021, 8, 23, 202110969581.X, entitled "a surface cleaning apparatus".

Technical Field

The invention relates to the technical field of cleaning equipment, in particular to surface cleaning equipment.

Background

Along with the improvement of living standard, the requirements of people on floor cleaning are higher and higher. Currently, surface cleaning apparatuses currently in the market mainly include a cleaner and a scrubber, wherein the scrubber can wet-clean a floor, i.e., supply a cleaning liquid to a floor to be cleaned or a wiper through a cleaning liquid supply system, wet-clean the floor, and then recover the contaminated cleaning liquid through a dirt recovery system to a sewage tank.

The problems of the sewage tank in the current market are as follows: the gas discharged from the sewage tank contains a large amount of water vapor which can be adsorbed to the filtering HEPA at the upstream of the motor, and if the HEPA is in a wet state for a long time, the filtering performance of the HEPA is affected, and peculiar smell can be generated.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention provides a surface cleaning device which can effectively reduce the water vapor content in the gas discharged from the recovery tank.

In particular, the present invention provides a cleaning system comprising

A soil recycling system for recycling soil from a surface to be cleaned, comprising a recycling bin for recycling soil, a suction duct, and a vacuum assembly for generating a suction airflow flowing along the suction duct, wherein the recycling bin comprises:

a body having a storage space defined therein for storing the dirt;

the air inlet pipe is at least partially arranged in the storage space;

a filter arranged above the warning water level and used for carrying out solid-liquid separation when the dirt is discharged from the pouring opening of the body, and keeping at least part of solid impurities in the storage space;

the separation plate is arranged above the filter, one side of the separation plate is a gas-liquid separation zone, the other side of the separation plate is a gas circulation zone, dirty suction airflow is carried to enter the gas-liquid separation zone through the air inlet pipe and then is subjected to gas-liquid separation, and the gas after gas-liquid separation flows through the gas circulation zone and then is discharged out of the storage space.

Optionally, a gas flow opening is defined between the filter and the partition plate, and most of the gas after gas-liquid separation enters the gas circulation zone from the gas-liquid separation zone through the gas flow opening.

Optionally, one end of the partition plate adjacent to the filter is a bottom end, and two ends adjacent to the bottom end are a left end and a right end respectively, wherein at least one of the left end and the right end is adjacent to or in contact with the inner wall surface of the body.

Optionally, an end of the partition plate contacting the inner wall of the body is provided with a sealing material.

Optionally, the air inlet pipe comprises an air outlet, and the filter is lower than the bottommost part of the air outlet.

Optionally, the recycling bin comprises a cover body mounted at a pouring opening of the storage space, and the partition plate is arranged on one side of the cover body facing the storage space.

Optionally, a gas-liquid separator is included disposed in the gas-liquid separation zone and configured to gas-liquid separate the dirty suction gas stream.

Optionally, the filter is below the lowest end of the gas-liquid separator.

Optionally, the lowest end of the partition plate is lower than the lowest end of the gas-liquid separator.

Optionally, the division board is the type of falling U, and it includes relative open end and the blind end of setting up, the open end set up in the lid, the division board is limited with U type opening, U type opening joint in gas-liquid separator is in order to divide into gas-liquid separation district and gas circulation district with the storage space of filter place plane top.

Optionally, the gas-liquid separator and the filter are integrally formed.

Optionally, the separator plate is integrally formed with the filter.

Optionally, the separation plate is integrally formed with the gas-liquid separator.

The invention provides a surface cleaning apparatus comprising a dirt recovery system for recovering dirt from a surface to be cleaned, comprising a recovery tank for recovering dirt, a suction duct and a vacuum assembly for generating a suction air flow flowing along the suction duct, wherein the recovery tank comprises a body, an air inlet pipe and a filter, the body defining a storage space for storing dirt therein. The air inlet pipe is at least partially arranged in the storage space. The filter is arranged on the body and above the warning water level and is used for carrying out solid-liquid separation when the dirt is discharged from the pouring opening of the body, and at least part of solid impurities are kept in the storage space. The separation plate is arranged above the filter, one side of the separation plate is a gas-liquid separation zone, the other side of the separation plate is a gas circulation zone, dirty suction airflow is carried into the gas-liquid separation zone through the air inlet pipe and then subjected to gas-liquid separation, and the gas after gas-liquid separation is discharged out of the storage space after flowing through the gas circulation zone. By adopting the structure, the filter can effectively prevent liquid from splashing to the gas circulation area, avoid water vapor to be carried to the outlet of the recovery box by the filtered gas, and effectively reduce the water vapor amount in the gas.

On the other hand, the invention also provides a recycling bin which is characterized by comprising

A body defining a storage space therein for storing dirt;

the air inlet pipe is at least partially arranged in the storage space, and the air flow carrying dirt enters the storage space through the air outlet of the air inlet pipe;

a filter disposed in the storage space for performing solid-liquid separation when the dirt is discharged from the pouring opening of the body;

a partition plate disposed in the storage space; the air outlet is arranged on a first side of the partition plate, at least part of the filter is positioned on a second side of the partition plate, the first side and the second side are respectively positioned on two opposite sides of the partition plate, and the filter is lower than the lowest end of the air outlet along the vertical direction; the air flow carrying dirt and flowing out of the air outlet is separated from the air and the liquid, enters the second side of the partition plate from the first side of the partition plate, and flows out of the storage space.

Optionally, the filter is located below the partition plate.

Optionally, an airflow opening is defined between the filter and the partition plate, and most of the air flows out of the air outlet and carrying dirt after being subjected to gas-liquid separation, passes through the airflow opening, enters the other side of the partition plate from one side of the partition plate, and flows out of the storage space, wherein the topmost end of the airflow opening is lower than the bottommost end of the air outlet.

Optionally, the filter is disposed between the lowest end of the partition plate and the warning water level in the storage space.

Optionally, at least one of the two ends of the partition plate is adjacent to or in contact with the inner wall surface of the body in the width direction of the body.

Optionally, the recovery box comprises a cover body arranged at the pouring opening of the storage space, and an exhaust port positioned right above the filter is arranged on the cover body.

Optionally, the separation plate is disposed on a side of the cover body facing the storage space, and the separation plate and the cover body are integrally formed.

Optionally, a gas-liquid separator is arranged at the gas outlet of the gas inlet pipe, the gas-liquid separator and the filter are integrally formed, and the filter is lower than the gas-liquid separator along the vertical direction.

In yet another aspect, the present invention also provides a recycling bin, including

A body defining a storage space therein for storing dirt;

a partition plate disposed in the storage space; the air outlet is arranged on the first side of the partition plate, the filter is arranged on the second side of the partition plate, the first side and the second side are respectively arranged on two opposite sides of the partition plate, and the left end and the right end of the partition plate are respectively adjacent to or contacted with the inner wall surface of the body, so that the air flow carrying dirt and flowing out of the air outlet enters the second side of the partition plate from the lower part of the partition plate after being subjected to gas-liquid separation and flows out of the storage space.

Drawings

FIG. 1 is a schematic view of a surface cleaning apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a recycling bin according to an embodiment;

FIG. 3 is an exploded view of the recycling bin in one embodiment;

FIG. 4 is a cross-sectional view of the recovery tank along the A-A direction in one embodiment;

FIG. 5 is a cross-sectional view of the recovery tank taken at another angle in the direction A-A in one embodiment;

FIG. 6 is a cross-sectional view of the recovery tank in the direction A-A in another embodiment;

FIG. 7 is a cross-sectional view of another embodiment of the recovery tank taken at another angle in the direction A-A;

FIG. 8 is a schematic view of a recycling bin according to another embodiment;

FIG. 9 is an exploded view of the recycling bin of FIG. 8;

FIG. 10 is a cross-sectional view of the recovery tank of FIG. 8 taken along the direction B-B;

FIG. 11 is a cross-sectional view of the recovery tank of FIG. 8 taken at another angle in the direction B-B;

FIG. 12 is a cross-sectional view of the recovery tank of FIG. 8 taken along the direction C-C;

FIG. 13 is a schematic view of the recycling bin of FIG. 8 with the cover removed;

fig. 14 is a schematic cross-sectional view of a recovery tank of yet another embodiment.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the case where a directional instruction is involved in the embodiment of the present invention, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application can be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1, fig. 1 is a schematic structural view of a surface cleaning apparatus 100 according to an embodiment of the present invention. The embodiment shown in the figures provides a surface cleaning apparatus 100. The surface cleaning apparatus 100 generally includes a soil recycling system. The dirt recovery system is for recovering dirt from a surface to be cleaned and comprises a recovery tank 17 for recovering dirt, a suction duct and a vacuum assembly for generating a suction air flow flowing along the suction duct. The surface cleaning apparatus 100 may further include a cleaning liquid supply system for spraying the cleaning liquid to the surface to be cleaned or the wiping piece of the roll brush or the like.

Referring to fig. 2-7, fig. 2 is a schematic view of the structure of the recovery tank 17 in one embodiment, fig. 3 is an exploded view of the structure of the recovery tank 17 in one embodiment, fig. 4 is a sectional view of the recovery tank 17 in the A-A direction in one embodiment, fig. 5 is a sectional view of the recovery tank 17 in another angle in the A-A direction in one embodiment, fig. 6 is a sectional view of the recovery tank 17 in another embodiment in the A-A direction, and fig. 7 is a sectional view of the recovery tank 17 in another angle in the A-A direction in another embodiment. Wherein the arrows in the figure are the airflow direction. The recovery tank 17 shown in the drawing includes a body 171 and an air intake pipe 172, and a storage space storing dirt is defined in the body 171. The body 171 includes a bottom wall 1712 and a side wall 1711 extending upward from the outer periphery of the bottom wall 1712, which together define a storage space. The air intake pipe 172 extends through the bottom wall 1712 into the storage space, at least part of the air intake pipe 172 being disposed in the storage space. The air inlet tube 172 includes an air inlet end and an air outlet end. The air inlet end is in fluid communication with the suction port of the surface cleaning apparatus 100. The air flow carrying the dirt enters the storage space through the air outlet 1741 of the air inlet pipe 172, and in this embodiment, the air inlet pipe 172 is disposed entirely in the storage space. The air intake pipe 172 is integrally formed with the body 171, and the air intake end of the air intake pipe 172 is integrally formed with the bottom wall 1712.

A filter 176 is also provided in the recovery tank 17. Referring to fig. 3, the filter 176 is generally a plate-like structure including a plurality of filter apertures. The filter 176 is mounted in the body 171, and the filter 176 may be mounted to either the intake pipe 172 or the body 171. The filter 176 is used for solid-liquid separation when dirt is discharged from a pouring opening (not shown) of the body 171, and retains at least part of the solid impurities in the storage space. When the user finishes cleaning or the recovery tank 17 is full of liquid and needs cleaning, the user needs to hold the recovery tank 17 and pour out impurities such as sewage from the pouring opening of the recovery tank 17.

In order to prevent the liquid droplets generated during use from splashing upwards, a filter 176 is therefore provided between the air outlet end and the warning water level in the storage space (the wavy line in fig. 4 can be seen as a warning water level line), which is the highest position that the sewage can reach in normal use of the recovery tank 17. By the arrangement, liquid splashing of the liquid in the recovery tank 17 in the use process can be effectively prevented. Although the filter 176 may block some splashed liquid, some splashed liquid may splash above the filter 176 from a position without the filter 176, at this time, some water vapor may flow along with the gas to the outlet of the recovery tank 17, and if the gas flow after gas-liquid separation directly flows to the outlet and the flow path is relatively close, the water vapor contained in the gas may not be sufficiently condensed into water droplets, so that the water content in the gas increases.

With continued reference to fig. 4-5, a divider 1761 is disposed in the storage space, where the divider 1761 divides the storage space corresponding to the divider 1761 into two opposite parts, i.e., a space above the warning water level of the storage space is divided into two parts, and a first side of the divider 1761 is a gas-liquid separation area 1765, and a second side is a gas circulation area 1766. The partition plate 1761 may be disposed in the gas flow area 1766, with at least one of the two ends of the partition plate 1761 being adjacent to or in contact with the inner wall surface of the body 171 in the width direction of the body 171 (radial direction of the body 171), specifically, one end of the partition plate 1761 having a plate-like structure adjacent to the filter 176 is a bottom end 1762, and the two ends adjacent to the bottom end 1762 are a left end 1763 and a right end 1764, respectively, wherein at least one of the left end 1763 and the right end 1764 is adjacent to or in contact with the inner wall surface of the body 171. The end of the partition plate 1761 is adjacent to the inner wall surface of the body 171, which means that the two are very close to each other, and that the gas passing through the gap formed between the two is very small, because the partition plate 1761 is convenient and labor-saving when being taken and put. Of course, in order to seal the left and right ends of the partition plate with the inner wall surface, the left and right ends of the partition plate 1761 may contact the inner wall surface of the body 171, and further, the end portion of the partition plate 1761 contacting the inner wall of the body 171 may be provided with a sealing material, which is not described in detail herein, and may be a soft rubber or other common sealing structure. The air outlet 1741 is disposed on a first side of the partition 1761, the filter 176 is disposed on a second side of the partition 1761, the first side and the second side are disposed on opposite sides of the partition 1761, and the left and right ends of the partition 1761 are adjacent to or in contact with the inner wall surface of the body 171, respectively, so that the dirty air flow flowing out of the air outlet 1741 enters the second side of the partition 1761 from below the partition 1761 after being separated from the air and the liquid, and flows out of the storage space. Further, an air flow opening 1767 may be provided between the filter 176 and the divider plate 1761 to ensure that a majority of the air flow is directed from the opening to the outlet of the body 171. By adding the partition plate 1761 and the filter 176, splashed water droplets can be prevented from being splashed onto the gas flow-through region 1766, and at the same time, the flow path of the gas can be increased. In a further embodiment, the air inlet tube 172 includes an air outlet 1741, and the filter 176 is below the bottom of the air outlet 1741 to effectively prevent liquid splashing.

Further, the recovery tank 17 includes a lid 178 attached to the pouring outlet of the storage space, and a partition plate 1761 is provided on the side of the lid 178 facing the storage space. The divider plate 1761 is disposed on a side of the cap 178 facing the storage space such that when the cap 178 is removed, the divider plate 1761 may be removed at the same time, and in one particular embodiment, the divider plate 1761 may also be integrally formed with the cap 178. The cover 178 is provided with an air outlet 1784 located directly above the filter 176.

Referring to fig. 6-7, in the illustrated embodiment, a divider plate 1761 is disposed above the filter 176, or the filter 176 is below the lowermost end of the divider plate 1761. As shown in fig. 6, the partition plate 1761 divides the storage space corresponding to the partition plate into two parts, namely, the space above the warning water level of the storage space, and the partition plate 1761 has a gas-liquid separation area 1765 on the first side and a gas circulation area 1766 on the second side. I.e., at least a portion of filter 176 is located on a second side of divider plate 1761. The divider plate 1761 may be a thin plate-like structure, and it is understood that the divider plate 1761 may be a straight plate, or a curved plate, or may be other shapes that, when combined with other structures, form a barrier component. The sucked air flow carrying dirt enters the air-liquid separation area 1765 through the air inlet pipe 172 for air-liquid separation, and the air after the air-liquid separation flows through the air circulation area 1766 and is discharged out of the storage space. In this way, the partition plate 1761 cooperates with the filter 176, so that not only can most of splashed liquid be prevented from splashing into the gas circulation area 1766, but also the flowing flow of the gas can be effectively increased, and the vapor carried in the gas can be condensed and dripped as much as possible.

With continued reference to fig. 4, in one embodiment, the recovery tank 17 includes a lid 178 mounted at the pouring spout of the storage space, and a divider plate 1761 is disposed on a side of the lid 178 facing the storage space. The divider plate 1761 is disposed on a side of the cap 178 facing the storage space such that when the cap 178 is removed, the divider plate 1761 may be removed at the same time, and in one particular embodiment, the divider plate 1761 may also be integrally formed with the cap 178. The cover 178 is provided with an air outlet 1784 located directly above the filter 176. When the cover 178 is attached to the body 171, the partition plate 1761 substantially divides the storage space above the plane of the filter 176 into a gas-liquid separation region 1765 and a gas flow region 1766. At least one of the two ends of the partition plate 1761 in the width direction of the body 171 (radial direction of the body 171) is adjacent to or in contact with the inner wall surface of the body 171, specifically, one end of the partition plate 1761 of a plate-like structure adjacent to the filter 176 is a bottom end 1762, and the two ends adjacent to the bottom end 1762 are a left end 1763 and a right end 1764, respectively, wherein at least one of the left end 1763 and the right end 1764 is adjacent to or in contact with the inner wall surface of the body 171. The end of the partition plate 1761 is adjacent to the inner wall surface of the body 171, which means that the two are very close to each other, and that the gas passing through the gap formed between the two is very small, because the partition plate 1761 is convenient and labor-saving when being taken and put. Of course, in order to achieve sealing of the left and right ends of the partition plate with the inner wall surface, the left and right ends of the partition plate 1761 may be in contact with the inner wall surface of the body 171, and further, the end of the partition plate 1761 in contact with the inner wall of the body 171 may be provided with a sealing material.

An air flow opening 1767 is defined between filter 176 and divider plate 1761, with the top end of air flow opening 1767 being lower than the bottom end of air outlet 1741. Thus, since the gas flow-through region 1766 is on the other side of the gas outlet 1741, the separated gas and liquid move in opposite directions while the gas flows downwardly through the gas flow openings 1767 and then upwardly out of the storage space, such that the gas flow path is increased and a substantial portion of the gas after gas-liquid separation passes from the gas flow separation region 1765 through the gas flow openings 1767 into the gas flow-through region 1766. Specifically, after the gas-liquid separation of the gas flow carrying the dirt flowing out of the gas outlet 1741, most of the gas flows out of the storage space through the gas flow opening 1767 from one side of the partition plate 1761 to the other side of the partition plate 1761, because a small portion of the gas may pass through the filter holes from below the filter 176 to enter the gas flow-through area 1766, and a small portion of the gas enters the gas flow-through area 1766 through the gap between the filter 176 and the inner wall surface of the body 171, however, the influence of the two portions of the gas is small.

Referring to fig. 8-13, fig. 8 is a schematic view of a recycling bin 17 according to yet another embodiment. Fig. 9 is an exploded view of the structure of the recovery tank 17 shown in fig. 8. Fig. 10 is a sectional view of the recovery tank 17 shown in fig. 8 along the direction B-B. Fig. 11 is a cross-sectional view of the recovery tank 17 shown in fig. 8 taken at another angle in the direction B-B. Fig. 12 is a sectional view of the recovery tank 17 shown in fig. 8 along the direction C-C. Fig. 13 is a schematic view of the recycling bin 17 of fig. 8 with the cover 178 removed. As shown in the illustrated embodiment, the recovery tank 17 further includes a gas-liquid separator 175 disposed in the gas-liquid separation region 1765 and configured to separate the dirty suction gas stream from the gas-liquid. Specifically, a gas-liquid separator 175 is provided at the gas outlet 1741 of the gas inlet pipe 172, and the gas-liquid separator 175 is used for gas-liquid separation of the fluid flowing out from the gas outlet 1741 of the gas inlet pipe 172. The outlet of the air inlet pipe 172 may be oriented in any direction, and the gas-liquid separator 175 may be disposed at the outlet. The gas-liquid separator 175 includes a body 171 and one or more liquid guides 1751 provided to the body 171. When the flow guiding part is one, the shape can be a quarter sphere or a sphere-like structure. When there are a plurality of flow guiding portions, a plurality of liquid flow guiding portions 1751 are arranged at intervals at the outlet of the air inlet pipe 172. The liquid diversion portion 1751 functions to collect and direct liquid toward the bottom of the tank. The gas outlets are disposed between two adjacent liquid flow guides 1751. The number of gas outlets is at least one. Wherein the bottom end 1762 of the liquid deflector 1751 is lower than the top end of the gas outlet in the direction of gravity. Specifically, after the water-gas mixture is discharged through the outlet of the air inlet pipe 172, most of the water mist and water droplets collide with the liquid guiding part 1751, are decelerated due to the wall attaching characteristic and then concentrated together, flow downwards along the inner wall of the liquid guiding part 1751 under the influence of gravity, and the gas flows in the direction opposite to the liquid and is separated from the liquid, so that the gas-liquid separation is realized. In a specific embodiment, the gas-liquid separator 175 and the filter 176 are integrally formed, and the filter 176 is vertically lower than the gas-liquid separator 175.

Referring to fig. 9, in order to cooperate with the gas-liquid separator 175, the partition plate 1761 is of an inverted U shape, which includes an open end and a closed end disposed opposite to each other, the open end being disposed on the cover 178, the partition plate 1761 defining a U-shaped opening that is engaged with the gas-liquid separator 175 to divide the storage space above the plane of the filter 176 into a gas-liquid separation region 1765 and a gas circulation region 1766. The lowest end of divider plate 1761 is lower than the lowest end of gas-liquid separator 175.

In other embodiments, the gas-liquid separator 175 may be integrally formed with the filter 176, and the divider plate 1761 may be integrally formed with the filter 176; it is understood that the gas-liquid separator 175, the partition plate 1761, and the filter 176 may be integrally formed.

In one embodiment, the filter 176 is disposed between the lowest end of the divider plate 1761 and the alert level in the storage space, which is the highest level that the recovery tank 17 can reach during normal use, and is typically marked on the body to alert the user. Further, the distance between the filter 176 and the warning water level along the gravity direction is a first preset distance, the distance between the filter 176 and the air outlet end is a second preset distance, and the first preset distance is smaller than the second preset distance. In a preferred embodiment, the first predetermined distance is less than 15mm, which corresponds to the filter 176 being placed against the water line. For detecting the level information in the recovery tank 17, the safe use of the apparatus is ensured, the recovery tank 17 further comprises at least one level detection device for detecting the level information in the storage space, wherein the level detection device is arranged above the filter 176. Specifically, the liquid level detection device generally comprises two conductive sheets, and when the two conductive sheets are immersed in liquid, the two conductive sheets are conducted to send out a signal to remind a user of cleaning the sewage tank. The liquid level detection device is arranged above the filter 176, and the filter 176 can resist most splashed liquid drops, so that the water drops in the recovery tank 17 are reduced to be sputtered to the probe. If the water drops form a conductive water film near the probe, even if the conductive sheet is not soaked by liquid, there is a high possibility that the conductive sheet is conducted, a false alarm will occur, and the user has to clean the recovery tank 17 and the cleaning liquid level detection device. Referring to fig. 13, the mounting bracket 1791 of the conductive sheet may be configured in the same structure as the partition 1761, and both may be detachable from each other or integrally formed.

Referring to fig. 14, fig. 14 is a schematic cross-sectional view of a recovery tank of yet another embodiment. In the present embodiment, the basic structure of the recovery tank 17 may be substantially the same as that in the above-described embodiment, the only difference being the positional relationship between the filter 176 and the partition plate 1761, and in the present embodiment, the gas flowing out from the gas outlet 1741 of the gas inlet pipe 172 flows to the outlet of the body after gas-liquid separation, wherein contact is made between the filter 176 and the partition plate 1761. The filter may be disposed under the partition plate, in which case the upper surface of the filter is in contact with the bottom end of the partition plate. The filter may also be provided on one side of the partition plate, in which case the end of the filter is in contact with the side of the partition plate. Most of the gas flow after gas-liquid separation flows from the gas-liquid separation zone to the gas circulation zone through the mesh openings of the filter. Therefore, the water vapor and the liquid carried in the gas are blocked by the filter when passing through the filter, so that liquid drops can be effectively prevented from splashing to the space above the filter, and part of the water vapor carried in the gas can be removed.

Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims

1. A surface cleaning apparatus, comprising

a body having a storage space defined therein for storing the dirt;

the air inlet pipe is at least partially arranged in the storage space;

the separation plate is arranged above the filter, one side of the separation plate is provided with a gas-liquid separation zone, the other side of the separation plate is provided with a gas circulation zone, dirty suction airflow enters the gas-liquid separation zone through the air inlet pipe and then is subjected to gas-liquid separation, and the gas after gas-liquid separation flows through the gas circulation zone and is discharged out of the storage space;

at least part of the filter is positioned in the gas circulation zone, and a gas-liquid separator for separating gas from liquid of the suction gas flow carrying dirt is also arranged in the gas-liquid separation zone; the air flow separated by the air-liquid separator enters the air circulation area from the lower part of the separation plate;

an airflow opening is further defined between the filter and the partition plate, and most of the gas after gas-liquid separation enters the gas circulation area through the airflow opening;

the gas-liquid separator comprises a plurality of liquid diversion parts, the liquid diversion parts are arranged at the outlet of the air inlet pipe at intervals, and a gas outlet is arranged between the adjacent liquid diversion parts; the sewage in the suction airflow is converged and guided to flow to the bottom of the sewage tank through the liquid guide part, and the airflow flows out of the gas-liquid separator from the gas outlet;

the liquid guiding parts are all positioned above the filter, and the top end of the gas outlet is higher than the bottom end of the liquid guiding part.

2. A surface cleaning apparatus as claimed in claim 1, wherein,

the end of the partition plate, which is close to the filter, is a bottom end, and two ends, which are adjacent to the bottom end, are a left end and a right end respectively, wherein at least one of the left end and the right end is adjacent to or in contact with the inner wall surface of the body.

3. A surface cleaning apparatus as claimed in claim 1, wherein,

the end of the partition plate, which is in contact with the inner wall of the body, is provided with a sealing material.

4. A surface cleaning apparatus as claimed in claim 1, wherein,

the air inlet pipe comprises an air outlet, and the filter is lower than the bottommost part of the air outlet.

5. A surface cleaning apparatus as claimed in claim 1, wherein,

the recovery box comprises a cover body arranged at the pouring opening of the storage space, and the partition plate is arranged on one side of the cover body, which faces the storage space.

6. A surface cleaning apparatus as claimed in claim 1, wherein,

the filter is contacted with the separation plate, and most of gas after gas-liquid separation flows from the gas-liquid separation area to the gas circulation area through meshes of the filter.

7. A surface cleaning apparatus as claimed in claim 1, wherein,

the lowest end of the partition plate is lower than the lowest end of the gas-liquid separator.

8. A surface cleaning apparatus as claimed in claim 5, wherein,

the division board is the type of falling U, and it includes relative open end and the blind end of setting up, the open end set up in the lid, the division board is limited with U type opening, U type opening joint in gas-liquid separator is in order to divide into gas-liquid separation district and gas circulation district with the storage space of filter place plane top.