WO2023124479A1

WO2023124479A1 - Recovery bin and surface cleaning device

Info

Publication number: WO2023124479A1
Application number: PCT/CN2022/127790
Authority: WO
Inventors: 钱忠; 邓学龙; 孙梦醒
Original assignee: 苏州简单有为科技有限公司
Priority date: 2021-12-31
Filing date: 2022-10-26
Publication date: 2023-07-06
Also published as: CN115336949A; CN114287850B; CN115336950A; CN115336950B; CN114287850A; CN115336949B

Abstract

Disclosed are a recovery bin (10) and a surface cleaning device (100). The recovery bin (10) comprises a body (1) defining a storage space (11) for storing dirt. The recovery bin (10) further comprises an air inlet channel (12) and an air outlet channel (14). The air inlet channel (12) is used for guiding dirt outside the storage space (11) into the storage space (11) through the air inlet channel (12). The air outlet channel (14) is used for guiding an airflow in the storage space (11) out of the storage space (11) through the air outlet channel (14). A pressure-unifying chamber (2) is arranged between the air inlet channel (12) and the air outlet channel (14). The pressure-balancing chamber (2) comprises an airflow inlet and an airflow outlet (23). The airflow outlet (23) is in fluid communication with the air outlet channel (14). The airflow inlet comprises a plurality of through-holes (24) that are arranged and spaced apart substantially in the horizontal direction. The through-holes (24) are in fluid communication with the storage space (11). The arrangement of the pressure-unifying chamber (2) in the recovery bin (10) unifies the pressure throughout the recovery bin (10) before the airflow comes out of the recovery bin (10) through the airflow outlet (23), thereby preventing the sewage in the recovery box (10) from spattering under the action of the airflow, and improving the volume utilization rate of the recovery bin (10).

Description

A recycling bin and surface cleaning equipment

technical field

The invention relates to the technical field of cleaning equipment, in particular to a recovery box and surface cleaning equipment.

Background technique

As an essential part of the washing machine, the sewage tank plays an important role in collecting sewage and other dirt. Therefore, the design of the sewage tank becomes particularly important. Due to the limited design space of the surface cleaning equipment, the volume of the sewage tank will not be designed to be very large. Sewage tanks in the prior art generally include a shell and an air intake pipe arranged in the shell. After the fluid enters the shell from the air intake pipe, it undergoes gas-liquid separation, and the separated liquid is stored in the shell, while the air flow Drain the waste water tank. When the liquid in the shell reaches a certain liquid level, since the air outlet in the liquid level is relatively close, and the airflow is relatively fast, the liquid in the shell will be splashed when disturbed by the airflow. These splashes may trigger false alarms and may It will follow the airflow out of the waste water tank through the air outlet, which is obviously not what the user wants to see.

In order to avoid the water turning phenomenon, it is necessary to reduce the effective volume of the waste water tank. Therefore, in order to improve the utilization rate of the waste water tank as much as possible, it is an urgent problem to be solved.

Contents of the invention

Aiming at the deficiencies in the above-mentioned technologies, the present invention provides a recovery box, which is provided with a pressure equalization chamber, so that the pressure in the recovery box is relatively evenly distributed before the air flow flows out of the recovery box from the air outlet, so as to avoid The sewage in the recovery box produces relatively large splashes under the action of the airflow, which improves the volume utilization rate of the recovery box.

On the one hand, the present invention provides a recycling bin, comprising

The main body has a limited storage space for storing dirt;

an air intake channel, used to guide the dirt outside the storage space into the storage space through the air intake channel;

an air outlet channel for guiding the airflow in the storage space to flow out of the storage space from the air outlet channel;

Wherein, a pressure equalization chamber is provided between the air inlet passage and the air outlet passage, the pressure equalization chamber includes an air inlet and an air outlet, the air outlet is in fluid communication with the air outlet, and the air inlet includes a plurality of air outlets. holes, the plurality of through holes are substantially arranged at intervals along the horizontal direction, and the through holes are in fluid communication with the storage space.

Optionally, the pressure equalization chamber is defined by an opposite top wall and a pressure equalization plate, and a plurality of through holes are opened on the pressure equalization plate, and the outer circumference of the through holes extends outward to form an annular protrusion, the height of which is on the outer wall of the equalizing plate.

Optionally, a gas-liquid separation device is arranged at the inlet outlet of the air inlet channel, and at least part of the gas-liquid separation device is arranged directly below the pressure equalization chamber.

Optionally, the gas-liquid separation device includes a gas-liquid separation part, the gas-liquid separation part extends along a direction substantially parallel to the pressure equalization chamber, and the gas-liquid separation part is provided with a plurality of gas outlet holes.

Optionally, the buffer cavity is used to guide the fluid discharged from the air inlet outlet to flow along the extending direction of the gas-liquid separation part.

Optionally, an opening is provided at the top of the recovery box, a cover for sealing the opening is provided at the opening, a pressure equalizing plate is provided on the inner side of the cover, and a gap is defined between the pressure equalizing plate and the cover. There is a pressure equalization chamber.

Optionally, both the airflow inlet and the airflow outlet are disposed on the pressure equalizing plate.

Optionally, both the air intake channel and the air outlet channel are disposed in the storage space.

Optionally, it also includes a float arranged in the air outlet channel, the float includes an open position and a closed position, and in the closed position, part of the float goes deep into the pressure equalization chamber for cutting off the air inlet and the passage between the air outlets described above.

On the other hand, the present invention also provides a surface cleaning device, which includes a dirt recovery system for cleaning the surface to be cleaned, and the dirt recovery system includes a suction nozzle, a suction pipeline, and is used for Ducted wet and dry motor for airflow and recovery bin as above.

The present invention provides a recycling box and a surface cleaning device, wherein the recycling box includes a main body defining a storage space for storing dirt. The recovery bin also includes an air inlet channel and an air outlet channel. The air intake channel is used to guide the dirt outside the storage space into the storage space through the air intake channel. The air outlet channel is used to guide the airflow in the storage space to flow out of the storage space from the air outlet channel. Wherein, a pressure equalization chamber is arranged between the air inlet passage and the air outlet passage. The pressure equalization chamber includes an airflow inlet and an airflow outlet. The airflow outlet is in fluid communication with the air outlet passage. The directions are arranged at intervals, and the through holes are in fluid communication with the storage space. There is a pressure equalizing chamber in the recovery box, so that the pressure in the recovery box is relatively evenly distributed before the airflow flows out of the recovery box from the air outlet, so as to avoid the sewage in the recovery box from producing relatively large splashes under the action of the airflow, and improve the recovery of the recovery box. capacity utilization.

Description of drawings

Fig. 1 is a schematic structural view of a surface cleaning device in an embodiment of the present invention;

Fig. 2 is the structural representation of recovery box in the prior art;

Fig. 3 is a schematic structural view of a recovery box in an embodiment;

Fig. 4 is a schematic structural view of the recovery box shown in Fig. 3 after removing the cover and leaking out of the pressure equalizing plate;

Fig. 5 is an exploded view of the structure of the recovery box shown in Fig. 3;

Fig. 6 is a structural schematic diagram of the air circulation when the float in the recovery box is in an open state;

Figure 7 is an enlarged view of the structure of the E area in Figure 6;

Fig. 8 is a structural schematic diagram of the closed state of the float in the recovery box;

Fig. 9 is an enlarged view of the structure of area F in Fig. 8;

Fig. 10 is a sectional view along A-A in Fig. 3;

Fig. 11 is a sectional view along B-B in Fig. 3;

Fig. 12 is an enlarged view of the structure of the region G shown in Fig. 11;

Fig. 13 is a sectional view along C-C in Fig. 3;

Fig. 14 is an enlarged view of the structure of the H region shown in Fig. 13;

Fig. 15 is a schematic structural view of a pressure equalizing plate in an embodiment;

Fig. 16 is a schematic structural view of the pressure equalizing plate at another angle;

Figure 17 is an enlarged view of the structure of the I region shown in Figure 16;

Fig. 18 is a schematic structural diagram of a gas-liquid separation device in an embodiment;

Fig. 19 is a schematic structural view of the gas-liquid separation device at another angle;

Fig. 20 is a schematic structural view of the gas-liquid separation device at another angle;

Fig. 21 is a schematic structural diagram of a gas-liquid separation device in another embodiment;

Fig. 22 is a sectional view along D-D shown in Fig. 18 .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there are directional indications involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture. If the specific posture changes , then the directional indication changes accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the meaning of "and/or" appearing in the whole text includes three parallel schemes, taking "A and/or B" as an example, including scheme A, scheme B, or schemes that both A and B satisfy. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application based on specific situations.

The present application discloses a surface cleaning device 100. The surface cleaning device 100 may be a handheld cleaning device, a vertical cleaning device, a horizontal cleaning device or an intelligent self-cleaning device. The direction of the arrow in the figure is the air flow direction. FIG. 1 is a schematic structural diagram of a surface cleaning device 100 in an embodiment of the present invention. In this embodiment, the horizontal cleaning equipment is taken as an example to describe its structure and functions in detail. The horizontal cleaning equipment includes a cleaning liquid supply system and a dirt recovery system. The cleaning liquid supply system is used to supply cleaning liquid to the surface to be cleaned or the wiped piece. The dirt recovery system includes a suction nozzle, a suction assembly for generating a suction flow along a suction line, and a recovery tank 10 in fluid communication with the suction line. The suction line is in fluid communication with the cleaning head (nozzle) via a hose. The suction component includes a wet and dry motor, and the wet and dry motor generally includes a main air duct and a cooling air duct. The air inlet of the main air duct of the wet and dry motor is in fluid communication with the suction pipeline. The cooling ducts are used to cool the internal structure of the motor.

Fig. 2 is a schematic structural view of a recovery box in the prior art. With reference to Fig. 2, the recovery box 10 among the figure is the recovery box 10 in the prior art, and main body 1 comprises lower wall, rear wall and the arc front wall that extends between lower wall and rear wall. The lower wall and the rear wall are substantially vertical. The lower wall, the rear wall and the curved front wall define a liquid storage space, and at least part of the curved front wall forms part of the outer surface of the horizontal cleaning device. In the illustrated embodiment, substantially all of the curved front wall forms the outer surface of the horizontal cleaning device. The recovery box 10 also includes an opening defined by an arc-shaped front wall and a rear wall, and a cover body for opening/closing the opening is provided at the opening. The lower wall and the cover are substantially parallel to each other. It comprises a body 1 defining a storage space for storing dirt. The air intake channel 12 is used to guide the dirt outside the storage space into the storage space through the air intake channel 12 . The air outlet channel 14 is used to guide the airflow in the storage space to flow out of the storage space from the air outlet channel 14 . With the recovery box 10, the phenomenon of turning over the water (that is, generating a large amount of water splashes) will occur during the working process, which will affect the user experience.

Referring to Fig. 3-14, Fig. 3 is a schematic structural diagram of a recovery box in an embodiment. Fig. 4 is a schematic diagram of the structure of the recovery box shown in Fig. 3 after removing the cover and leaking out of the pressure equalizing plate. Fig. 5 is an exploded view of the structure of the recovery box shown in the protrusion 3. Fig. 6 is a schematic diagram of the structure of the air flow when the float in the recovery box is in an open state. FIG. 7 is an enlarged view of the structure of area E in FIG. 6 . Fig. 8 is a schematic structural view of the float in the recovery box in a closed state. FIG. 9 is an enlarged view of the structure of area F in FIG. 8 . Fig. 10 is a sectional view along A-A in Fig. 3 . Fig. 11 is a sectional view along B-B in Fig. 3 . FIG. 12 is an enlarged view of the structure of region G shown in FIG. 11 . Fig. 13 is a sectional view along C-C in Fig. 3 . FIG. 14 is an enlarged view of the structure of the region H shown in FIG. 13 . FIG. 3 shows a recovery box 10 in an embodiment of the present application. The main body 1 of the recovery box 10 is in the shape of a semi-cylindrical body. The main body 1 defines a storage space 11 for storing dirt. The recovery box 10 also includes an air intake channel 12 for guiding the dirt outside the storage space 11 into the storage space 11 through the air intake channel 12 . At least part of the air intake channel 12 can be set in the storage space 11 , and can also be set outside the storage space 11 , which is not limited here and can be adjusted according to the shape of the recycling bin 10 . The air outlet channel 14 is used to guide the airflow in the storage space 11 to flow out of the storage space 11 from the air outlet channel 14 . At least part of the air outlet channel 14 can be set outside the storage space 11 , or all of it can be set outside the storage space 11 , which is not limited here and can be adjusted according to the shape of the recovery box 10 . In the embodiment shown in FIG. 6 , the air inlet passage 12 and the air outlet passage 14 are two substantially parallel pipes, both of which are arranged in the storage space 11 and located in the middle of the storage space 11 .

Referring to Figures 6-9, in order to prevent the liquid in the recovery tank 10 from producing or avoiding splashes as much as possible during operation, a pressure equalization chamber 2 is provided between the air inlet passage 12 and the air outlet passage 14, and the pressure equalization chamber 2 Including an airflow inlet and an airflow outlet 23, the airflow outlet 23 is in fluid communication with the air outlet channel 14, the airflow inlet includes a plurality of through holes 24, the plurality of through holes 24 are basically arranged at intervals along the horizontal direction, and the horizontal direction here is not strictly defined In the same horizontal plane, but basically in the same horizontal plane, because of the specific structure, there may be ups and downs between different through holes 24, or some of the through holes 24 are slightly higher than the other part of the air through holes 24, or The plurality of through holes 24 are slightly inclined as a whole, and these structures and some structures not described in detail are within the protection scope of the present application. The through hole 24 is in fluid communication with the storage space 11 . The purpose of setting up the pressure equalizing chamber 2 is to make the surface of the liquid in the recovery tank 10 receive substantially the same force, so as not to cause water splashes due to the disturbance of the air flow, so that the volume utilization rate of the recovery tank 10 can be effectively improved. Because when there is no pressure equalizing chamber 2, the air pressure near the air outlet channel 14 is the lowest, and the suction force generated is the largest, which will cause uneven pressure distribution in the recovery box 10, thereby disturbing the liquid in the recovery box 10 and producing water splashes.

Continuing to refer to Figures 6-9, the recovery box 10 also includes a float 16, the float 16 includes an open position and a closed position, and in the closed position, part of the float 16 goes deep into the pressure equalization chamber 2 to cut off the airflow inlet and the airflow outlet 23 the airflow between. In one embodiment, the float 16 is arranged at the air outlet channel 14, and can move with the liquid level in the recovery tank 10. When the liquid level rises to a certain level, part of the float 16 enters the pressure equalizing chamber 2, and the air flow inlet is cut off. and the channel between the air outlet 23.

5-9, in one embodiment, the top of the recovery box 10 is provided with an opening, the opening is provided with a cover 25 for sealing the opening, the inner side of the cover 25 is provided with a pressure equalizing plate 26, the pressure equalizing plate 26 and the cover 25 defines a pressure equalizing chamber 2 . The periphery of the pressure equalizing plate 26 is in sealing connection with the cover body 25 . The pressure equalizing chamber 2 can move together with the cover body 25 . In other embodiments, the recovery box 10 may not have a cover body 25, and the air inlet channel 12 and the air outlet channel 14 may also be detachably installed on the body of the recovery box 10, and the body may be separately provided with drainage holes. The pressure equalizing chamber 2 is defined by the opposite top wall and the equalizing plate 26. The equalizing plate 26 is provided with a plurality of through holes 24, and the outer circumference of the through holes 24 extends outward to form an annular protrusion 28, which is higher than the The outer wall 27 of the equalizing plate 26 . The top wall may be a part of the main body 1 of the recovery box 10 , or may be a structure independent of the main body 1 . The function of the annular protrusion 28 is to prevent the liquid droplets formed on the outer wall 27 of the pressure equalizing plate 26 from being sucked into the through hole 24 .

Referring to Figures 15-17, Figure 15 is a schematic structural view of the pressure equalizing plate in an embodiment. Fig. 16 is a schematic structural view of the pressure equalizing plate at another angle. FIG. 17 is an enlarged view of the structure of the region I shown in FIG. 16 . As shown in FIGS. 15-17 , based on any of the above-mentioned embodiments, the airflow inlet and the airflow outlet 23 are both arranged on the pressure equalizing plate 26 . Certainly, in other embodiments, the air outlet 23 may not be disposed on the pressure equalizing plate 26 , and only needs to be in fluid communication with the pressure equalizing chamber 2 .

Referring to FIGS. 16-17 , based on any of the above embodiments, the outer wall 27 of the pressure equalizing plate 26 is also provided with a plurality of liquid collecting structures 29 extending outward, and the liquid collecting structures 29 are arranged around the annular protrusion 28 . The function of the liquid collecting structure 29 is to gather the water film formed on the outer wall 27 of the pressure equalizing plate 26 into small liquid droplets and make them fall into the storage space 11 . The fluid-gathering structure 29 is generally called a cone,

Referring to Figure 12 and Figures 15-17 at the same time, on the basis of any of the above-mentioned embodiments, the pressure equalization chamber 2 includes a distribution chamber 21 and a converging chamber 22, and the converging chamber 22 is generally set close to the air outlet inlet 15 of the air outlet pipe to ensure that the unit The air flow passing through within a certain period of time meets the requirements of surface cleaning equipment. The distribution cavity 21 is generally distributed directly above the liquid, and it is best to cover all the surfaces of the liquid. Of course, the distribution cavity 21 may not cover all the surfaces of the liquid, depending on the specific structure. A plurality of through holes 24 are evenly distributed in the distribution cavity 21 . To ensure that the generated pressures at the through holes 24 are substantially the same. The height H1 of the distribution cavity 21 along the vertical direction is smaller than the height H2 of the converging cavity 22 . The bottom area of the converging chamber 22 is less than 1/5 of the bottom area of the distribution chamber 21, so that the bottom area of the distribution chamber 21 can be made as large as possible to cover more liquid surfaces. In order to improve the pressure equalizing effect, the total area of the plurality of through holes 24 is less than 1/5 of the area of the pressure equalizing plate 26 . Further, the total area of the through holes 24 is less than 1/10 of the area of the pressure equalizing plate 26 . Further, the total area of the through holes 24 is less than 1/20 of the area of the pressure equalizing plate 26 .

Referring to Figures 18-22, Figure 18 is a schematic structural diagram of a gas-liquid separation device in an embodiment. Figure 19 is a schematic structural view of the gas-liquid separation device from another angle. Fig. 20 is a schematic structural view of the gas-liquid separation device from another angle. Fig. 21 is a schematic structural view of a gas-liquid separation device in another embodiment. Fig. 22 is a sectional view along D-D shown in Fig. 18 . In order to further improve the pressure equalization effect, a gas-liquid separation device 3 is provided at the air inlet outlet 13 of the air inlet passage 12, and the gas-liquid separation device 3 is arranged at the air inlet outlet 13 of the air inlet passage 12 for carrying out fluid For gas-liquid separation, at least part of the gas-liquid separation device 3 is arranged directly below the pressure equalization chamber 2 . The gas-liquid separation device 3 includes a cover body 31 and a gas-liquid separation part 32 provided on the cover body 31 . The cover body 31 defines a buffer cavity 38 facing the air inlet outlet 13 . The gas-liquid separation part 32 arranged on the cover body 31, the gas-liquid separation part 32 basically extends along the horizontal direction, the gas-liquid separation part 32 includes a plurality of guide plates 33 arranged at intervals, wherein the guide plates 33 are along the direction away from the cover body 31 Extending, an air outlet 39 is defined between adjacent guide plates 33 . The effect of guide plate 33 is to guide the air-flow that blows out from air inlet 13 to flow along horizontal direction, avoids that air-flow directly blows to pressure equalizing plate 26 or blows to liquid surface, if air-flow directly blows to liquid surface, air inlet 13 is far away from liquid surface relatively. If it is short, a lot of water splashes will be aroused. If the air flow directly blows the pressure equalization plate 26, the water vapor in the air flow will enter the pressure equalization chamber 2. Therefore, the guide plates 33 are basically arranged horizontally, and at the same time, air outlet holes 39 are provided between the guide plates 33 to increase the movement distance of the air flow in the recovery box 10 and improve the gas-liquid separation effect.

The guide plate 33 is provided with a guide groove 34 , the opening of the guide groove 34 faces downwards, and is in fluid communication with the buffer cavity 38 of the cover body 31 . In one embodiment, the end of the guide groove 34 away from the cover body 31 is closed to prevent the airflow from directly blowing on the inner wall of the recovery box 10. In another embodiment, the end of the guide groove 34 away from the cover body 31 can be rounded, and finally Towards the liquid surface or the inner wall of the recovery tank 10 .

Referring to FIG. 19 , in one embodiment, the buffer cavity 38 faces the air inlet outlet 13 , and at least part of the buffer cavity 38 of the cover body 31 is higher than the gas-liquid separation part 32 along the vertical direction.

Referring to FIG. 22 , in one embodiment, the gas-liquid separation part 32 includes a top plate 35 and a bottom plate 36, a fluid channel 40 is defined between the top plate 35 and the bottom plate 36, and the fluid channel 40 is in fluid communication with the buffer cavity 38 for guiding The airflow discharged from the buffer cavity 38 flows along the extending direction of the gas-liquid separation part 32 . The top plate 35 is disposed between the cover body 31 and the guide plate 33 . The bottom plate 36 includes a plurality of water grooves 37 arranged at intervals, and the water grooves 37 are used to collect and guide liquid flow. The gas-liquid separator 32 is provided around the intake outlet 13 . In other embodiments, the gas-liquid separation part 32 can also be separately arranged on one side of the air inlet outlet 13, and the other side is convenient for users to dump sewage. The air intake outlet 13 is located between the bottom plate 36 and the top plate 35 in the vertical direction.

Referring to FIG. 21 , in another embodiment, the buffer cavity 38 is used to guide the fluid discharged from the air inlet outlet 13 to flow along the extending direction of the gas-liquid separation part 32 to improve the effect of gas-liquid separation.

Referring to Fig. 12, in order to further improve the separation effect, the gas-liquid separation part 32 of the gas-liquid separation device 3 extends in a direction substantially parallel to the pressure equalizing chamber 2, and the distance H3 between the top of the gas-liquid separation part 32 and the pressure equalizing plate 26 is less than 20mm.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Further modifications can be effected, so the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

A recovery box (10), is characterized in that, comprises

The main body (1) defines a storage space (11) for storing dirt;

an air intake channel (12), used to guide dirt outside the storage space (11) into the storage space (11) through the air intake channel (12);

an air outlet channel (14), used to guide the airflow in the storage space (11) to flow out of the storage space (11) from the air outlet channel (14);

Wherein, a pressure equalization chamber (2) is provided between the air inlet passage (12) and the air outlet passage (14), and the pressure equalization chamber (2) includes an airflow inlet and an airflow outlet (23), and the airflow The outlet (23) is in fluid communication with the air outlet channel (14), the air inlet includes a plurality of through holes (24), and the plurality of through holes (24) are arranged at intervals substantially along the horizontal direction, and the through holes (24) In fluid communication with said storage space (11).
The recovery bin (10) according to claim 1, characterized in that,

The pressure equalizing chamber (2) is defined by an opposite top wall and a pressure equalizing plate (26), and a plurality of through holes (24) are opened on the pressure equalizing plate (26), and the outer circumferential direction of the through holes (24) The outer extension forms an annular protrusion (28), and the annular protrusion (28) is higher than the outer wall (27) of the pressure equalizing plate (26).
The recovery bin (10) according to claim 1, characterized in that,

A gas-liquid separation device (3) is provided at the gas inlet outlet (13) of the air intake passage (12), and at least part of the gas-liquid separation device (3) is disposed directly below the pressure equalization chamber (2) .
The recovery bin (10) according to claim 3, characterized in that,

The gas-liquid separation device (3) includes a gas-liquid separation part (32), the gas-liquid separation part (32) extends along a direction substantially parallel to the pressure equalization chamber (2), and the gas-liquid separation part ( 32) A plurality of air outlet holes (39) are provided.
The recycling bin (10) according to claim 4, characterized in that,

The buffer cavity (38) is used to guide the fluid discharged from the air inlet outlet (13) to flow along the extending direction of the gas-liquid separation part (32).
The recycling bin (10) according to claim 5, characterized in that,

The top of the recovery box (10) is provided with an opening, and the opening is provided with a cover (25) for sealing the opening, and the inside of the cover (25) is provided with a pressure equalizing plate (26), and the pressure equalizing plate A pressure equalization cavity (2) is defined between (26) and the cover (25).
The recovery bin (10) as claimed in claim 2 or 6, characterized in that,

Both the airflow inlet and the airflow outlet (23) are arranged on the pressure equalizing plate (26).
The recovery bin (10) according to claim 1, characterized in that,

Both the air intake channel (12) and the air outlet channel (14) are arranged in the storage space (11).
The recovery bin (10) according to claim 8, characterized in that,

It also includes a float (16) arranged in the air outlet channel (14), the float (16) includes an open position and a closed position, and in the closed position, part of the float (16) goes deep into the pressure equalization chamber (2) Inside, it is used to cut off the passage between the airflow inlet and the airflow outlet (23).
A recovery box (10), is characterized in that, comprises

The main body (1) defines a storage space (11) for storing dirt, an opening is provided at the top of the main body (1), and a cover (25) for sealing the opening is provided at the opening, the A pressure equalizing plate (26) is provided on the inner side of the cover (25), and a pressure equalizing chamber (2) is defined between the pressure equalizing plate (26) and the cover (25), and the pressure equalizing chamber (2) includes Airflow inlet and airflow outlet (23);

an air intake passage (12), through which dirt outside the storage space (11) enters the storage space (11);

an air outlet channel (14), in fluid communication with the air outlet (23);

Wherein, the air inlet includes a plurality of through holes (24), the plurality of through holes (24) are arranged at intervals substantially along the horizontal direction, and the through holes (24) are in fluid communication with the storage space (11), The airflow entering from the air inlet passage (12) flows through the airflow inlet, the pressure equalization chamber (2), the airflow outlet (23) in sequence, and then flows out from the air outlet passage (14).
The recovery bin (10) according to claim 10, characterized in that,

At least some of the plurality of through holes (24) are arranged on the pressure equalizing plate (26), and the outer circumference of the through holes (24) protrudes outward to form an annular protrusion (28), and the annular protrusion (28) It protrudes from the outer wall (27) of the pressure equalizing plate (26).
The recycling bin (10) according to claim 11, characterized in that,

The outer wall (27) is also provided with a plurality of liquid collecting structures protruding outward, and the liquid collecting structures are arranged around the annular protrusion (28).
The recovery bin (10) according to claim 10, characterized in that,

The pressure equalization chamber (2) includes a distribution chamber (21) and a converging chamber (22) which communicate with each other, and the height of the distribution chamber (21) is smaller than that of the converging chamber (22) along the vertical direction.
The recovery bin (10) according to claim 13, characterized in that,

The area of the distribution cavity (21) is larger than the area of the convergence cavity (22).
A surface cleaning device (100), characterized in that it includes a dirt recovery system for cleaning a surface to be cleaned, and the dirt recovery system includes a suction nozzle, a suction pipeline, and is used to generate dirt along the suction pipeline. The wet and dry motor of the airflow and the recovery box (10) as described in any one of the above claims 1-14.