A surface cleaning apparatus

Abstract

The surface cleaning device comprises a floor brush part, the floor brush part is provided with a containing cavity and a cover plate which is openable and closable up and down and is located on the upper side or the lower side of the containing cavity, a dust bin, an air outlet assembly and a circumferential wall surrounding the air outlet assembly are arranged in the containing cavity, a cyclone cavity is formed between the air outlet assembly and the circumferential wall surrounding the air outlet assembly, the circumferential wall is provided with a tangential inlet, the axis direction of the cyclone cavity is arranged substantially parallel to the surface to be cleaned, the cyclone cavity is arranged in communication with the dust bin, and the cover plate is used for opening the dust bin to pour dust.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surface cleaning devices such as electric dust mop, scrubber, vacuum cleaner, and robot sweeper (also known as robot cleaner), and in particular to a surface cleaning device. BACKGROUND

[0002] In the surface cleaning devices such as electric dust mop, scrubber, vacuum cleaner, and robot sweeper (also known as robot cleaner) having a suction port (the suction port sucks dirt and other contaminants into a dust bin or a dirt collection chamber), since the dirt and other contaminants need to be sucked in through the suction port, a part for moving cleaning on the surface to be cleaned, referred to as a brush part in the present disclosure, is needed. The brush part moves on the surface to be cleaned and sucks in the dirt and other contaminants through the suction port. The filter assembly, dust bin, or dirt collection chamber can be integrally provided on the brush part or separately provided at a remote end (i.e., the brush part is only provided with suction-related structures, and the filter assembly, dust bin, or dirt collection chamber is separately provided from the brush part, such as a commonly known handheld cyclone separation vacuum cleaner, which has a filter assembly including a cyclone separator. The cyclone separator and the brush part are connected and communicated through a suction pipe accessory). The present disclosure mainly discusses a technical solution in which the cyclone separator and the dust bin or dirt collection chamber are integrally provided on the brush part. Since the cyclone separator and the dust bin or dirt collection chamber need to be integrally provided, the structure is relatively complex and large, especially the height. When the cyclone separator is provided, it is difficult to further reduce the height. However, the cyclone separator has the advantages of good separation effect and no need for consumables. Therefore, for the surface cleaning device using the cyclone separator structure, if the brush part requires a small height, the cyclone separator structure can only be used in a separate arrangement. In addition, for a robot sweeper (also known as robot cleaner) (the robot sweeper as a whole can be regarded as a brush part. For the convenience of description, the robot sweeper is referred to as a brush part integrated with a suction assembly and a self-walking structure in the present disclosure), if the cyclone separator structure is used, according to the current structure design, the height of the robot sweeper will be greatly increased, which is not conducive to the robot sweeper to enter into a space with a low height such as under a sofa, and seriously hinders the activity range of the robot sweeper.

[0003] The present applicant hopes to break through the existing technical limitations. In the present disclosure, a surface cleaning device is proposed, which is beneficial to reduce the height of the brush part while using the cyclone separator. SUMMARY

[0004] The present application relates to the technical field of surface cleaning devices such as electric dust mop, scrubber, vacuum cleaner, and robot sweeper (also known as robot cleaner), and in particular to a surface cleaning device.

[0005] Compared with the prior art, the present application provides a surface cleaning device, comprising a floor brush part, the floor brush part is provided with a containing cavity and a cover plate which can be opened and closed up and down and is located on the upper side or lower side of the containing cavity, a dust bin, an air outlet assembly and a circumferential wall surrounding the air outlet assembly are arranged in the containing cavity, a cyclone cavity is formed between the air outlet assembly and the circumferential wall surrounding the air outlet assembly, the circumferential wall is provided with a tangential inlet, the axial direction of the cyclone cavity is arranged substantially parallel to the surface to be cleaned, the cyclone cavity is arranged in communication with the dust bin, and the cover plate is used to open the dust bin to discharge dust.

[0006] Preferably, the axial direction of the cyclone cavity is arranged substantially crosswise to the advancing direction of the floor brush part, and the tangential inlet is arranged along the advancing direction.

[0007] Preferably, the cyclone cavity and the dust bin are sequentially arranged along the axial direction of the cyclone cavity.

[0008] Preferably, a dust blocking partition plate is arranged between the cyclone cavity and the dust bin.

[0009] Preferably, the cyclone cavity and the dust bin are arranged in communication through a dust outlet, the dust outlet and the tangential inlet are arranged staggered along the axial direction of the cyclone cavity, and the dust outlet adopts a tangential outlet and / or an axial outlet.

[0010] Preferably, the air outlet end of the air outlet assembly, the tangential inlet and the dust outlet are sequentially arranged along the axial direction of the cyclone cavity.

[0011] Preferably, the circumferential wall is composed of two transversely detachable parts, which are respectively referred to as a first part and a second part, the first part and the second part are spliced to form the cyclone cavity, the first part is fixedly arranged in the containing cavity, and the second part is opened after the cover plate is opened or can be opened together with the cover plate.

[0012] Preferably, the first part and the second part are arranged in an up-down manner, and the first part and the second part can be opened in the up-down direction.

[0013] Preferably, the first part and the second part adopt a splicing structure which can be relatively rotated to open and close.

[0014] Preferably, the dust bin is composed of two transversely detachable parts, which are respectively referred to as a third part and a fourth part, the fourth part is arranged on the cover plate together with the second part, and the fourth part is opened at the same time as the second part when the cover plate is opened.

[0015] Preferably, the cover plate is located on the lower surface of the floor brush part, and the cover plate opens / closes the containing cavity by being opened / closed up and down.

[0016] Preferably, the air outlet assembly is arranged on the second part, and the air outlet assembly is also exposed outside the floor brush part after the second part is opened.

[0017] Preferably, the dust blocking partition is fixedly arranged, and the second part is arranged to be openable relative to the dust blocking partition.

[0018] Preferably, the tangential inlet is arranged on the second part, and after the second part is opened, the tangential inlet is also exposed outside the floor brush part.

[0019] Preferably, the floor brush part is provided with a collection part, the collection part is used to gather dirt on the cleaned surface when the floor brush part advances, the collection part is provided with a collection suction port, the tangential inlet and the collection suction port are separately connected in communication, after the second part is opened, the tangential inlet and the collection suction port are separated, and after the second part is re-spliced with the first part, the tangential inlet and the collection suction port are re-connected in communication.

[0020] Preferably, the floor brush part is further provided with a filter, the filter is connected in communication with the air suction assembly through an air suction flow channel, and the filter, the cyclone chamber and the dust bin are sequentially arranged in the floor brush part along the axial direction of the cyclone chamber.

[0021] Preferably, the floor brush part is further provided with an air suction assembly and a self-walking structure.

[0022] After the above structure is adopted, compared with the prior art, the present application has the following advantages:

[0023] Although the cyclone separator is arranged, the axial direction of the cyclone chamber is arranged to be substantially parallel to the cleaned surface, which is conducive to reducing the height of the floor brush part, and the up-down openable cover plate arranged on the upper side or the lower side of the containing chamber is used to open the dust bin to dump dust, so that the cyclone separator does not need to be taken out for dumping dust, thereby omitting the shell and the base for taking and placing the cyclone separator, further reducing the height of the floor brush part, and in addition, the dust dumping is convenient. In summary, while the cyclone separator is adopted, the height of the floor brush part is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective view of a floor brush of a surface cleaning device in a cleaning process on a cleaned surface.

[0025] Figure 2 It is a top view of a floor brush part of a surface cleaning device.

[0026] Figure 3 It is a sectional view along A-A.

[0027] Figure 4 It is a sectional view along B-B.

[0028] Figure 5 It is a perspective view from a bottom view angle.

[0029] Figure 6 It is one of the perspective views in an open state.

[0030] Figure 7 Fig. 2 is a perspective view of the device in an open state.

[0031] Figure 8 Fig. 3 is a perspective view of the device in a top partially cutaway state.

[0032] Figure 9 is a top view of Figure 8

[0033] Legend: 1 - body, 2 - air outlet assembly, 3 - cyclone chamber, 4 - tangential inlet, 5 - first part, 6 - second part, 7 - rotating part, 8 - dust bin, 9 - tangential outlet, 10 - axial outlet, 11 - air outlet end, 12 - dust barrier, 13 - button, 14 - elastic member, 15 - first hook, 16 - second hook, 17 - filter screen, 18 - air outlet tube, 19 - collection part, 20 - surface to be cleaned, 21 - filter, 22 - cover plate, 23 - sealing gasket, 24 - roller, 25 - collection suction port. DETAILED DESCRIPTION

[0034] The following description is provided to enable any person skilled in the art to practice the present application. The embodiments described in the following are only examples of the present application, and other obvious modifications can be made by those skilled in the art. The principles defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions without departing from the spirit and scope of the present application.

[0035] In the present disclosure, it should be noted that dust is a general term, not only referring to dust, but also any dirt, garbage, etc. that can be cleaned by a surface cleaning device.

[0036] The present application is further described in detail as follows:

[0037] The present disclosure provides a surface cleaning device, and the disclosed technical solutions can be applied to various products, such as an electric dust mop, a vacuum cleaner, a sweeper, a sweeping robot (also known as a robot), etc. The surface cleaning device referred to in the present disclosure generally refers to a household or small surface cleaning device, which is also a feature of the surface cleaning device provided by the present disclosure, i.e. the overall structure size is required to be small, which can be suitable for small space cleaning.

[0038] For ease of understanding, as Figures 1 to 9 ​As shown, the present disclosure specifically exemplifies a floor brush part of a surface cleaning device, the floor brush part is provided with a containing cavity and a cover plate 22 which is openable and closable upward and downward, the containing cavity is provided with a dust bin 8, an air outlet assembly 2 and a peripheral wall surrounding the air outlet assembly 2, the air outlet assembly 2 and the peripheral wall surrounding the air outlet assembly 2 form a cyclone cavity 3, the peripheral wall is provided with a tangential inlet 4, the axis of the cyclone cavity 3 is arranged substantially parallel to the surface to be cleaned 20, the cyclone cavity 3 is arranged in communication with the dust bin 8, and the cover plate 22 is used to open the dust bin 8 to pour dust. Of course, the cover plate 22 can also be located on the upper side of the containing cavity, but the cover plate 22 located on the lower side of the containing cavity is more convenient for pouring dust and cleaning. The floor brush part can be used in an electric dust mop, a vacuum cleaner, a sweeper, a sweeping robot (also known as a floor treasure), etc., and if it is a sweeping robot, a suction assembly and a self-walking structure can be added on the basis of the floor brush part to realize the sweeping robot, at this time the floor brush part is the body of the sweeping robot.

[0039] In some embodiments, the floor brush part includes a body 1, the body 1 is integrated with a filter 21, a cyclone cavity 3 and a dust bin 8, and the filter 21 is connected in communication with the air suction assembly through an air outlet pipe 18. The body 1 further includes an air outlet assembly 2 and a peripheral wall surrounding the air outlet assembly 2, the air outlet assembly 2 is provided with a filter screen 17, the air outlet assembly 2 and the peripheral wall surrounding the air outlet assembly 2 form the cyclone cavity 3, the peripheral wall is provided with a tangential inlet 4, and the peripheral wall is composed of two transversely detachable parts, which are respectively referred to as a first part 5 and a second part 6. As shown in Figure 4 、 5 The first part 5 and the second part 6 are in a spliced state, in order to improve the sealing performance after splicing, a sealing gasket 23 is arranged between the first part 5 and the second part 6, as shown in Figure 6 、 7 The first part 5 and the second part 6 are in a separated state, when in the separated state, the cyclone cavity 3 is in an open state, thereby facilitating cleaning, and further, when in the separated state, the dust bin 8 is also in an open state, thereby facilitating dust pouring. As shown in Figure 9 The arrows in the figure represent the main flow direction of the suction air flow.

[0040] In some embodiments, as shown in Figure 3 、 8 , 9, the filter 21, the cyclone cavity 3 and the dust bin 8 are sequentially arranged in the body 1 along the axis of the cyclone cavity 3. After such design, the structure is relatively compact, and in addition, the width in the forward direction can be made relatively narrow.

[0041] In some embodiments, as shown in Figure 4 、 5As shown in Figs. 6, the axis of the cyclone cavity 3 is arranged approximately crosswise to the advancing direction of the brush part, and the tangential inlet 4 is arranged along the advancing direction. In this way, on the one hand, when the brush part is advancing, dust enters the cyclone cavity 3 from the tangential inlet 4 in the dusting direction, which is conducive to better cleaning of the surface 20 to be cleaned. On the other hand, it is conducive to simplifying the design of the inlet flow channel, thereby reducing the structural size. In addition, it is conducive to the implementation of the technical solution that the filter 21, the cyclone cavity 3, and the dust bin 8 are arranged in sequence along the axis of the cyclone cavity 3.

[0042] In some embodiments, as shown in Figs. 1-2, the first part 5 and the second part 6 are arranged in sequence along the advancing direction of the brush part. Figure 6 7 As shown in Figs. 6, the first part 5 and the second part 6 are arranged in sequence along the advancing direction of the brush part.

[0043] In some embodiments, as shown in Figs. 1-2, the first part 5 and the second part 6 are arranged in sequence along the advancing direction of the brush part. Figure 6 7 As shown in Figs. 6, the first part 5 and the second part 6 are arranged in sequence along the advancing direction of the brush part. Figure 3 As shown in Figs. 6, the first part 5 and the second part 6 are arranged in sequence along the advancing direction of the brush part. In order to better fix the cover plate 22 and facilitate opening, as shown in Figs. 6, the other end of the cover plate 22 is connected to the machine body 1 through a connecting structure formed by a button 13, an elastic member 14, a first hook portion 15, and a second hook portion 16. The button 13 and the elastic member 14 are arranged on the side wall of the machine body 1. The button 13 adopts a lever structure and is rotationally connected to a rotating support arranged on the side wall. The upper end of the button 13 is provided with the elastic member 14 between the button 13 and the side wall. The lower end of the button 13 is provided with the first hook portion 15. The other end of the cover plate 22 is provided with the second hook portion 16 matched with the first hook portion 15. When the button 13 is pressed, the first hook portion 15 releases the second hook portion 16, so that the cover plate 22 is opened. In order to better automatically open the cover plate 22, the rotatable portion 7 is provided with a torsional spring. Through the elastic force of the torsional spring, after the first hook portion 15 releases the second hook portion 16, the cover plate 22 can be better automatically opened.

[0044] In some embodiments, as shown in Figs. 1-2, the first part 5 and the second part 6 are arranged in sequence along the advancing direction of the brush part. Figure 3 8 As shown in Figs. 6, the cyclone cavity 3 and the dust bin 8 are communicated through a dust outlet. The dust outlet and the tangential inlet 4 are arranged in sequence along the axis of the cyclone cavity 3. The dust outlet adopts a tangential outlet 9 and / or an axial outlet 10. In this way, dust can better enter the dust bin 8 through the tangential outlet 9 and / or the axial outlet 10, thereby facilitating cyclone separation.​​​

[0045] In some embodiments, as shown in Figure 3 , 6 , 8, 9, a dust blocking partition 12 is arranged between the cyclone chamber 3 and the dust bin 8. In this way, dust entering the dust bin 8 can be prevented from being sucked into the cyclone chamber 3 again.

[0046] In some embodiments, the air outlet end 11 of the air outlet assembly 2, the tangential inlet 4, and the dust outlet are sequentially arranged along the axial direction of the cyclone chamber 3. In this way, the structure is compact, and a better cyclone separation structure is formed.

[0047] In some embodiments, as shown in Figure 5 , 6 , 7, the dust bin 8 is composed of two transversely detachable parts, which are respectively referred to as a third part and a fourth part. The third part is connected to the first part 5, and the fourth part is connected to the second part 6. When the first part 5 and the second part 6 are detached, the third part and the fourth part are simultaneously detached. In this way, dust in the cyclone chamber 3 and dust in the dust bin 8 can be poured out together, which is more convenient for use and cleaning.

[0048] In some embodiments, as shown in Figure 6 , 7 , the first part 5 is fixedly arranged in the body 1 of the surface cleaning device, and the second part 6 is arranged to be openable relative to the first part 5 to open the cyclone chamber 3. After the second part 6 is opened, the inner surface of the second part 6 is exposed outside the body 1. In this way, the cyclone separation structure does not need to be additionally detached for cleaning, but only needs to be opened relative to the first part 5 for cleaning. After cleaning is completed, the second part 6 is reassembled with the first part 5.

[0049] In some embodiments, as shown in Figure 6 , 7 , the air outlet assembly 2 is arranged on the second part 6. After the second part 6 is opened, the air outlet assembly 2 is also exposed outside the body 1. In this way, the air outlet assembly 2 can be more conveniently cleaned.

[0050] In some embodiments, as shown in Figure 6 , 7 , based on the air outlet assembly 2 being arranged on the second part 6, a clever design is made. Specifically, for the case where the dust blocking partition 12 is arranged between the cyclone chamber 3 and the dust bin 8, the dust blocking partition 12 is fixedly arranged, and the second part 6 is arranged to be openable relative to the dust blocking partition 12. In this way, after the second part 6 is opened, the air outlet assembly 2 is exposed outside the body 1, and the blocking of the end of the second part 6 by the dust blocking partition 12 is removed, which is more convenient for cleaning.

[0051] In some embodiments, such as Figure 6 , 7 As shown, the tangential inlet 4 is located on the second part 6. When the second part 6 is opened, the tangential inlet 4 is also exposed outside the body 1. This design makes it easier to clean the tangential inlet 4 and allows the cyclone chamber 3 to be positioned closer to the surface of the body 1. For the floor brush, this means the cyclone chamber 3 is positioned lower because the tangential inlet 4 needs to be tangentially positioned. If the tangential inlet 4 were positioned higher, the entire cyclone chamber 3 would be positioned upwards. Therefore, when the tangential inlet 4 is located on the second part 6, it can be positioned closer to the surface of the body 1. In this example, since the second part 6 is located on the cover plate 22, and the second part 6 is opened together with the cover plate 22, the tangential inlet 4 is located on the cover plate 22, which is very close to the surface 20 being cleaned. The lower positioning of the cyclone chamber 3 brings additional benefits, such as reducing the height of the body 1 and exposing the internal structure of the cyclone chamber 3 for easier cleaning.

[0052] In some embodiments, such as Figure 6 , 7 As shown, the body 1 is provided with a collecting section 19, which is used to collect dirt from the surface 20 being cleaned. The collecting section 19 is provided with a general suction port 25. The tangential inlet 4 and the general suction port 25 can be separately connected. After the second part 6 is opened, the tangential inlet 4 and the general suction port 25 are separated. After the second part 6 is reassembled with the first part 5, the tangential inlet 4 and the general suction port 25 are reconnected. With this design, based on the splicing design of the second part 6 and the first part 5 of this disclosure, good cleaning performance can still be maintained, and the collecting section 19 will not be impossible to set up due to the splicing design of the second part 6 and the first part 5.

[0053] In some embodiments, such as Figure 6 , 7 As shown, the second part 6 includes an axially extending portion. The second part 6 and the axially extending portion together constitute the inner surface portion of the cover plate 22. This axially extending portion serves as the fourth part of the dust chamber 8. When the third part is fixed in the body 1, this axially extending portion opens together with the second part 6 to separate the third part from the fourth part for dust emptying. In this example, the axially extending portion is part of the cover plate 22. To facilitate movement on the surface 20 being cleaned, the outer surface of the cover plate 22 is set as a plane, and to simplify the structure, the cover plate 22 is approximately a flat plate.

[0054] In some embodiments, such as Figure 5 , 6As shown in Figs. 1, 2, 3, 4, 5, 6, and 7, the lower surface of the machine body is provided with a plurality of rollers 24, which facilitate the movement of the brush part on the surface to be cleaned 20 for cleaning work. The lower side of the cover plate 22 is provided with at least one roller 24, which is used to support the surface to be cleaned 20. Through the support of the roller 24, the cover plate 22 can be automatically closed, and the automatic closing is locked through the cooperation of the first hook part 15 and the second hook part 16.

[0055] In some embodiments, as shown in Figs. 1, 2, 3, 4, 5, 6, and 7, the surface cleaning device is provided with a plurality of wheels 23, which are used to support the surface to be cleaned 20 and facilitate the movement of the brush part on the surface to be cleaned 20 for cleaning work. Figure 1 、 2 As shown in Figs. 1, 2, 3, 4, 5, 6, and 7, during the cleaning work of the surface cleaning device, the axis of the cyclone chamber 3 is arranged substantially parallel to the surface to be cleaned 20. After this design, it is beneficial to arrange the cyclone chamber 3 and the tangential inlet 4 closer to the surface to be cleaned 20, so as to realize more efficient cleaning work, and it is also beneficial to reduce the height of the machine body 1.

[0056] In understanding the present application, if necessary, the above structure can refer to other embodiments / attached drawings for reference. Figure 1 It is understood that the above is not repeated here.

[0057] The above description is only an embodiment of the present application for illustration, so any equivalent changes or modifications made according to the structure, features and principles described in the patent protection scope of the present application are included in the patent protection scope of the present application.

Claims

1. A surface cleaning device, comprising a floor brush portion, characterized in that, The floor brush part has a receiving cavity and a cover plate that can be opened and closed on the upper or lower side of the receiving cavity. The receiving cavity has a dust bin, an air outlet component and a peripheral wall surrounding the air outlet component. A cyclone cavity is formed between the air outlet component and the peripheral wall surrounding the air outlet component. The peripheral wall has a tangential inlet. The axial direction of the cyclone cavity is arranged approximately parallel to the surface being cleaned. The cyclone cavity is connected to the dust bin. The cover plate is used to open the dust bin to empty the dust. The perimeter wall is composed of two horizontally separable parts, referred to as the first part and the second part respectively. The first part and the second part are joined together to form the cyclone cavity. The first part is fixedly installed in the receiving cavity, and the second part is opened after the cover is opened or can be opened together with the cover. The tangential inlet is located on the second part, and when the second part is opened, the tangential inlet is also exposed outside the floor brush part; The floor brush section is equipped with a collection section, which is used to gather dirt on the surface being cleaned when the floor brush section moves forward. The collection section is equipped with a collection port. The tangential inlet and the collection port can be connected separately. After the second part is opened, the tangential inlet and the collection port are separated. After the second part is reassembled with the first part, the tangential inlet and the collection port are reconnected.

2. The surface cleaning device according to claim 1, characterized in that, The axial direction of the cyclone chamber is roughly cross-shaped with the forward direction of the floor brush section, and the tangential inlet is arranged along the forward direction.

3. The surface cleaning device according to claim 1, characterized in that, The cyclone chamber and dust bin are arranged sequentially along the axial direction of the cyclone chamber.

4. The surface cleaning device according to claim 3, characterized in that, A dust-blocking baffle is installed between the cyclone chamber and the dust bin.

5. The surface cleaning device according to claim 3, characterized in that, The cyclone chamber and the dust bin are connected by a dust outlet. The dust outlet and the tangential inlet are offset along the axial direction of the cyclone chamber. The dust outlet is a tangential outlet and / or an axial outlet.

6. The surface cleaning device according to claim 5, characterized in that, The air outlet, tangential inlet, and dust outlet of the air outlet assembly are arranged sequentially along the axial direction of the cyclone chamber.

7. The surface cleaning device according to claim 1, characterized in that, The first and second parts are positioned vertically, and can be opened vertically between them.

8. The surface cleaning device according to claim 7, characterized in that, The first and second parts are connected by a joint structure that allows for relative rotation and opening / closing.

9. The surface cleaning device according to claim 1, characterized in that, The dust chamber is composed of two horizontally detachable parts, referred to as the third and fourth parts respectively. Both the fourth and second parts are mounted on the cover plate, and when the cover plate is opened, the fourth and second parts are opened simultaneously.

10. The surface cleaning apparatus according to claim 9, characterized in that, The cover is located on the lower surface of the floor brush section, and the cover opens / closes the receiving cavity by opening and closing it.

11. The surface cleaning device according to claim 1, characterized in that, The air vent assembly is located on the second section, and when the second section is opened, the air vent assembly is also exposed outside the floor brush section.

12. The surface cleaning apparatus according to claim 11, characterized in that, In cases where a dust baffle is installed between the cyclone chamber and the dust bin, the dust baffle is fixed in place, and the second part can be opened relative to the dust baffle.

13. The surface cleaning device according to claim 1, characterized in that, The floor brush section is also equipped with a filter, which is connected to the air extraction component through the air extraction channel. The filter, cyclone chamber, and dust bin are arranged sequentially in the floor brush section along the axial direction of the cyclone chamber.

14. The surface cleaning apparatus according to claim 1 or 13, characterized in that, The floor brush section is also equipped with an air extraction component and a self-propelled structure.

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