Cleaning head and surface cleaning device

Abstract

The present disclosure provides a cleaning head and a surface cleaning apparatus. The cleaning head includes a housing, a suction nozzle, a connecting tube assembly, and a cleaning assembly; the suction nozzle is formed in the housing, wherein the suction nozzle defines a start point of a liquid recovery path; one end of the connecting tube assembly is connected to the suction nozzle, and the liquid recovery path is defined through the connecting tube assembly; the cleaning assembly is arranged in the connecting tube assembly, and the cleaning assembly is configured to receive a cleaning liquid and provide the cleaning liquid to an inner wall of the connecting tube assembly to impact and clean the inner wall of the connecting tube assembly during self-cleaning of the connecting tube assembly.

Description

Technical Field

[0001] This disclosure relates to a cleaning head and surface cleaning device. Background Technology

[0002] Existing floor cleaners clean floors with high-flow-rate cleaning fluid in a way that completely wets the floor to be cleaned. By wetting the hard floor surface, the cleaning head transfers dust from the floor into the cleaning fluid, which is then removed from the hard floor surface and stored in a recycling storage section as contaminated cleaning fluid.

[0003] Wet surface cleaners typically consist of a cleaning head and a main body. When using a wet surface cleaner, the cleaning head and main body can be at different angles; therefore, a flexible hose is usually included in the cleaning head to accommodate these angle changes. However, because the hose bends at the connection point between the cleaning head and the main body, dirt can accumulate at this bend. Therefore, it is necessary to self-clean the hose to remove dirt from the bend. Utility Model Content

[0004] This disclosure provides a cleaning head and a surface cleaning device.

[0005] According to one aspect of this disclosure, a cleaning head is provided, comprising: case; A suction nozzle formed in the housing, wherein the suction nozzle defines the starting point of the liquid recovery path; A connecting tube assembly, one end of which is connected to the suction nozzle and defines a liquid recovery path; A cleaning assembly disposed on the connecting pipe assembly, the cleaning assembly being configured to receive cleaning liquid and, during self-cleaning of the connecting pipe assembly, provide the cleaning liquid to the inner wall of the connecting pipe assembly to impact and clean the inner wall of the connecting pipe assembly.

[0006] According to at least one embodiment of the cleaning head of the present disclosure, the connecting tube assembly includes a rigid tube, and the cleaning assembly includes a nozzle disposed on the inner wall of the rigid tube.

[0007] According to at least one embodiment of the cleaning head of this disclosure, the nozzle sprays cleaning liquid in the same direction as the direction of the recycled liquid flowing within the connecting pipe assembly; wherein, during the self-cleaning of the connecting pipe assembly, the cleaning liquid impacts the inner wall of the connecting pipe assembly in the direction of recycled liquid recovery.

[0008] According to at least one embodiment of the cleaning head of this disclosure, the connecting tube assembly further includes a flexible tube, one end of the rigid tube being connected to a suction nozzle, and the other end of the rigid tube being connected to one end of the flexible tube; wherein the cleaning assembly is used to clean the flexible tube installed on the rigid tube.

[0009] According to at least one embodiment of the cleaning head of the present disclosure, the nozzle is formed through a through hole formed on the rigid tube.

[0010] According to at least one embodiment of the cleaning head of this disclosure, the nozzles are configured as a plurality of nozzles, which are distributed generally laterally on the inner wall of the upper part of the rigid tube.

[0011] According to at least one embodiment of the cleaning head of this disclosure, the outlet of the nozzle is generally parallel to the axis of at least a segment of the rigid tube.

[0012] According to at least one embodiment of the cleaning head of the present disclosure, the cleaning assembly includes a connector for receiving cleaning liquid, wherein the rigid tube is provided with a receiving space, and the connector is sealed within the receiving space.

[0013] According to at least one embodiment of the cleaning head of this disclosure, a fluid channel is formed between the connector portion and the rigid tube, and the fluid channel communicates with the nozzle.

[0014] According to another aspect of this disclosure, a surface cleaning device is provided, which includes the cleaning head described above. Attached Figure Description

[0015] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0016] Figure 1 This is a schematic diagram of the structure of a surface cleaning device according to one embodiment of the present disclosure.

[0017] Figure 2 This is a schematic diagram of the structure of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure.

[0018] Figure 3 This is a structural schematic diagram of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure from another angle.

[0019] Figure 4 This is a schematic diagram of the internal structure of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure.

[0020] Figure 5This is a partial structural diagram of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure.

[0021] Figure 6 This is a schematic diagram of the connecting tube assembly and the cleaning assembly of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure.

[0022] Figure 7 This is a cross-sectional structural schematic diagram of the connecting tube assembly and the cleaning assembly of the cleaning head of a surface cleaning device according to an embodiment of the present disclosure.

[0023] Figure 8 This is a schematic diagram of the nozzle structure of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure.

[0024] Figure 9 This is a schematic diagram of the connector portion of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure.

[0025] Figure 10 This is a schematic diagram of the structure of a rigid tube of a cleaning head of a surface cleaning device according to one embodiment of the present disclosure.

[0026] The specific labels in the attached figures are as follows: 100 handle part 200 Frame Department 300 Cleaning Solution Storage Section 400 Recycling and Storage Department 500 Connecting part 600 Cleaning Head 610 housing 620 suction nozzle 630 Front Cleaning Components 640 Cover 660 Side Cleaning Component 670 Connecting Pipe Assembly 671 Rigid Tube 672 Hose 673 Installation Connector 680 Cleaning Components 681 Nozzle 682 Connector. Detailed Implementation

[0027] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0028] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as providing exemplary features of various details that provide ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of various implementations / embodiments may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0030] Figure 1 This is a schematic diagram of the structure of a surface cleaning device according to one embodiment of the present disclosure.

[0031] like Figure 1 As shown, the surface cleaning device disclosed herein is used to clean the floor surface to be cleaned. Preferably, the surface cleaning device is capable of wet cleaning the floor surface to be cleaned and recovering the liquid after cleaning the floor surface to be cleaned back to the surface cleaning device.

[0032] like Figure 1 As shown, structurally, the surface cleaning device may include components such as a handle 100, a frame 200, a cleaning fluid storage unit 300, a recovery storage unit 400, a connecting part 500, and a cleaning head 600.

[0033] In use, the surface cleaning apparatus of this disclosure has a cleaning head 600 configured to move on the floor surface to be cleaned, so as to perform wet cleaning on the floor surface to be cleaned by means of the cleaning head 600.

[0034] The handle 100 is used to operate the surface cleaning device. More specifically, the operator can control the orientation of the surface cleaning device by operating the handle 100. For example, by controlling the handle 100, the surface cleaning device can be tilted (at an angle of approximately 60° to the surface to be cleaned) or laid flat (approximately parallel to the surface to be cleaned). Correspondingly, when the frame 200 of the surface cleaning device is tilted (at an angle of approximately 60° to the surface to be cleaned) or laid flat (approximately parallel to the surface to be cleaned), the surface cleaning device is in cleaning mode and can clean the surface to be cleaned. Correspondingly, when the handle 100 is operated to make the frame 200 of the surface cleaning device vertical, the surface cleaning device is in a stopped state, or when the surface cleaning device is located at a base station, the frame 200 of the surface cleaning device is also in a approximately vertical state.

[0035] On the other hand, physical buttons can be provided on the handle 100, so that the surface cleaning equipment can be controlled by these physical buttons, such as controlling the start and stop of the surface cleaning equipment, as well as controlling the liquid supply speed and suction power of the surface cleaning equipment, thereby improving the user experience of the surface cleaning equipment.

[0036] The handle portion 100 can be provided at the upper end of the frame portion 200, so that the surface cleaning device can be operated by operating the handle portion 100. In this disclosure, the frame portion 200 is formed as the main load-bearing structure of the surface cleaning device, and the cleaning liquid storage portion 300 and the recovery storage portion 400 of the surface cleaning device can both be directly or indirectly fixed to the frame portion 200.

[0037] The cleaning fluid storage section 300 is formed in the shape of a box to store cleaning fluid. In one embodiment, the cleaning fluid can be purified water. Of course, those skilled in the art will know that the cleaning fluid storage section 300 can also store a mixture of purified water and cleaning agent, etc.

[0038] A receiving space is formed on the frame portion 200, and the cleaning fluid storage portion 300 can be disposed in the receiving space, such that a portion of the outer surface of the cleaning fluid storage portion 300 is formed as part of the outer surface of the surface cleaning device.

[0039] In this disclosure, the cleaning fluid storage unit 300 can be detached from the frame unit 200 and filled with cleaning fluid manually by the user; of course, the cleaning fluid storage unit 300 of this disclosure can also be filled with cleaning fluid through the cleaning fluid interface provided on the frame unit 200.

[0040] Furthermore, when a cleaning liquid interface is provided on the frame portion 200, the cleaning liquid storage portion 300 can be provided inside the frame portion 200. In this case, the cleaning liquid storage portion 300 is not formed as at least part of the outer surface of the surface cleaning device.

[0041] In this disclosure, in order to clean the surface to be cleaned, the cleaning fluid storage unit 300 is connected to the cleaning head 600 at least through a cleaning fluid pipeline, thereby supplying the cleaning fluid to the cleaning head 600 and thus achieving wet cleaning of the surface to be cleaned.

[0042] In another embodiment, the cleaning fluid reservoir 300 may also be disposed on the cleaning head 600. In other words, the cleaning head 600 may include the cleaning fluid reservoir 300. Since this configuration is also prior art, it will not be described in detail here.

[0043] like Figure 1As shown, the frame portion 200 has a receiving space, and the recycling storage portion 400 is detachably disposed in the frame portion 200 and located within the receiving space, so that when there is a large amount of liquid stored in the recycling storage portion 400, the user can remove the recycling storage portion 400, pour out the sewage inside and clean up the solid waste. At this time, part of the outer surface of the recycling storage portion 400 forms part of the outer surface of the surface cleaning device.

[0044] In order to recover the liquid after cleaning the surface, the recovery storage unit 400 can be connected to the cleaning head 600 through a recovery pipeline. Accordingly, the mixture of sewage and gas (dirt) can be recovered to the recovery storage unit 400 through the recovery pipeline.

[0045] Accordingly, the surface cleaning equipment also includes a suction device (not shown in the figure), which generates negative pressure and provides this negative pressure to the recovery storage unit 400, thereby achieving forced flow of gas and wastewater within the recovery pipeline. In this disclosure, the gas discharged from the suction device can flow to the outside of the surface cleaning equipment through gaps on a portion of the outer surface of the surface cleaning equipment.

[0046] The frame portion 200 is connected to the cleaning head 600 via the connecting portion 500, thereby making the frame portion 200 pivotally connected to the cleaning head 600. In this disclosure, the frame portion 200 has at least two rotational degrees of freedom relative to the cleaning head 600, thereby enabling the user to operate the surface cleaning equipment more conveniently.

[0047] Figure 2 This is a schematic diagram of the structure of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure. Figure 3 This is a structural schematic diagram of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure from another angle. Figure 4 This is a schematic diagram of the internal structure of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure. Figure 5 This is a partial structural diagram of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure. Figure 6 This is a schematic diagram of the connecting tube assembly and the cleaning assembly of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure. Figure 7 This is a cross-sectional structural schematic diagram of the connecting tube assembly and the cleaning assembly of the cleaning head of a surface cleaning device according to an embodiment of the present disclosure. Figure 8 This is a schematic diagram of the nozzle structure of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure.

[0048] In this disclosure, such as Figures 2 to 6 As shown, the cleaning head 600 may include components such as a housing 610, a suction nozzle 620, a front cleaning assembly 630, a cover 640, and a side cleaning assembly 660.

[0049] The housing 610 is configured to be connected to the frame portion 200 via the connecting portion 500, and the housing 610 is adaptable to move on the floor surface to be cleaned. For example, the housing 610 may include two rollers, and the movement of the rollers on the surface to be cleaned causes the housing 610 to move on the surface to be cleaned.

[0050] The housing 610 defines a receiving cavity for the cleaning head, which is located in the front half of the cleaning head (with the direction of movement of the surface cleaning device when cleaning the surface to be cleaned as the front) so as to accommodate the front cleaning assembly 630, which is also located in the front half of the cleaning head.

[0051] like Figure 4 As shown, a suction nozzle 620 is formed on the housing 610. In this disclosure, the suction nozzle 620 is disposed adjacent to and behind the front cleaning assembly 630. In this disclosure, the suction nozzle 620 is connected to the recovery pipeline and forms the starting point of the recovery path, that is, the starting point of the liquid recovery path.

[0052] The front cleaning component 630 is configured to agitate the floor surface to be cleaned; that is, when the surface cleaning device is performing a cleaning operation or a self-cleaning operation, the front cleaning component 630 can be driven by the first motor to rotate, thereby enabling the front cleaning component 630 to make frictional contact with the floor surface to be cleaned and achieving cleaning of the floor surface. During the frictional contact between the front cleaning component 630 and the floor surface to be cleaned, cleaning liquid can be provided to the front cleaning component 630, thereby achieving wet cleaning of the floor surface to be cleaned.

[0053] In one embodiment, a first motor may be disposed in the housing 610 and drive the front cleaning assembly 630 to rotate via a synchronous belt drive (i.e., operably connected to the first motor); in another embodiment, the first motor may be disposed in the front cleaning assembly 630 and be able to drive the front cleaning assembly 630 to rotate; in this disclosure, the front cleaning assembly 630 is rotatable along a first axis; more preferably, the first axis may be a horizontal straight line in the transverse direction, which is the direction perpendicular to the front-back direction; the front-back direction is the direction of movement of the surface cleaning device when cleaning the surface to be cleaned.

[0054] A cover 640 is disposed on the housing 610 and configured to partially surround the front cleaning assembly 630; in one embodiment, the cover 640 is also formed as part of a receiving cavity. In other words, the cover 640 and the housing 610 together form the aforementioned receiving cavity.

[0055] The side cleaning assembly 660 is detachably connected to the housing 610 and is located at least partially below the housing 610; that is, at least a portion of the side cleaning assembly 660 is located below the housing 610 and is able to contact the surface to be cleaned so that the side cleaning assembly 660 can also clean the surface to be cleaned.

[0056] The cleaning head disclosed herein also includes components such as a connecting tube assembly 670 and a cleaning assembly 680. One end of the connecting tube assembly 670 is connected to the suction nozzle 620 and defines a liquid recovery path; the other end of the connecting tube assembly 670 is connected to a recovery storage unit 400, thereby allowing a mixture of dirt and cleaning liquid to flow into and be stored in the recovery storage unit 400 via the connecting tube assembly 670.

[0057] The cleaning component 680 of this disclosure is disposed on the connecting pipe assembly 670. The cleaning component 680 is configured to receive cleaning liquid and, during the self-cleaning process of the connecting pipe assembly 670, supply the cleaning liquid to the inner wall of the connecting pipe assembly 670 to impact and clean the inner wall of the connecting pipe assembly 670. Specifically, the cleaning component 680 of this disclosure can be connected to the cleaning liquid storage unit 300, thereby allowing the cleaning liquid storage unit 300 to supply cleaning liquid to the cleaning component 680. In a preferred embodiment, the cleaning liquid stored in the cleaning liquid storage unit 300 can be pressurized by a pump and supplied to the cleaning component 680. At this time, the cleaning liquid can be ejected from the cleaning component 680 at a relatively fast flow rate, thereby giving the connecting pipe assembly 670 a better cleaning effect.

[0058] In this disclosure, the connecting pipe assembly 670 includes a rigid pipe 671, and the cleaning assembly 680 includes a nozzle 681 disposed on the inner wall of the rigid pipe 671. Thus, by providing the rigid pipe 671, it is convenient to form the nozzle 681, and it also makes the cleaning assembly 680 firmly fixed on the rigid pipe 671, which facilitates the fixing of the cleaning assembly 680.

[0059] The connecting tube assembly 670 of this disclosure also includes a hose 672, one end of a rigid tube 671 is connected to a suction nozzle 620, and the other end of the rigid tube 671 is connected to one end of the hose 672; wherein, the cleaning assembly 680 is used to clean the hose 672 installed on the rigid tube 671.

[0060] In other words, when the angle between the frame 200 and the cleaning head 600 changes, the hose 672 is in different bending states. Therefore, by configuring the hose 672, the recycling storage unit 400 and the cleaning head 600 can always be connected. Furthermore, when the surface cleaning device is cleaning the surface to be cleaned, there is generally an angle of approximately 60° between the frame 200 and the cleaning head 600. Therefore, the hose 672 is also in a bending state of approximately 60°. At this time, dirt will accumulate at the bend of the hose 672, so the hose 672 needs to be rinsed to remove the dirt inside.

[0061] More specifically, the other end of the rigid tube 671 of this disclosure is provided with a mounting joint 673, and one end of the flexible tube 672 can be inserted into the mounting joint 673 and fixed by the mounting joint 673. At this time, a stepped surface is formed at the connection between the rigid tube 671 and the mounting joint 673, and one end of the flexible tube 672 can contact the stepped surface and be restricted in position by the stepped surface to prevent the flexible tube 672 from being inserted into the rigid tube 671 by a large dimension.

[0062] The rigid tube 671 and the mounting joint 673 of this disclosure can be formed separately and installed together, or they can be formed integrally, and this disclosure does not limit them.

[0063] The fluid passage inside the rigid tube 671 of this disclosure is formed with a non-circular cross-section. Specifically, a protrusion is formed on the inner wall of the rigid tube 671, that is, the protrusion extends radially inward from the inner wall of the circular rigid tube 671, and at least a portion of the end face of the protrusion is located inside the flexible tube 672.

[0064] The nozzle 681 described above can be formed on the protrusion, and the projection of the nozzle 681 on the end face of the hose 672 is located inside the hose 672, so that the liquid sprayed by the nozzle 681 can be sprayed entirely into the interior of the hose 672, thereby preventing the liquid sprayed by the nozzle 681 from leaking from the outer peripheral surface of the hose 672.

[0065] See again Figure 7 The nozzle 681 sprays the cleaning liquid in the same direction as the direction of the recycled liquid flowing within the connecting pipe assembly 670; that is, the nozzle 681 is positioned towards the recycling storage section 400. In other words, the outlet of the nozzle 681 is approximately parallel to the axis of at least a section of the rigid pipe 671. During the self-cleaning process of the connecting pipe assembly 670, the cleaning liquid impacts the inner wall of the connecting pipe assembly 670 in the direction of recycled liquid recovery, thereby allowing the liquid sprayed from the nozzle 681 to flow upward along the inner wall of the hose 672 to clean the inner wall of the hose 672.

[0066] In another embodiment, the nozzle 681 may also be oriented at an angle to the central axis of one end of the hose 672, which may be 0-15°. Thus, the liquid sprayed by the nozzle 681 can be directed toward the side wall of one end of the hose 672, and this liquid can directly flush the inner wall of the hose 672, thereby improving the cleaning effect on the inner wall of the hose 672.

[0067] Specifically, the nozzle 681 is formed through a through hole formed in the rigid tube 671. For example, the through hole is formed in the aforementioned protrusion. Furthermore, the nozzle 681 of this disclosure is provided in plurality, with the plurality of nozzles 681 distributed substantially laterally on the inner wall of the upper portion of the rigid tube 671. That is, when the cleaning head 600 is placed on a substantially horizontal surface to be cleaned, the plurality of nozzles 681 can be formed on a substantially horizontal plane.

[0068] Based on the above structure, the cleaning head of this disclosure requires the suction device to be in operation during use, thereby forming a flowing airflow inside the connecting tube assembly. At this time, the airflow can generate a low-pressure area inside the connecting tube assembly, and correspondingly, the cleaning liquid sprayed by the nozzle 681 can cover the circumferential area inside the connecting tube assembly, thereby enabling a thorough cleaning of the connecting tube assembly (e.g., a hose).

[0069] Figure 9 This is a schematic diagram of the connector portion 682 of the cleaning head of a surface cleaning device according to one embodiment of the present disclosure. Figure 10 This is a schematic diagram of the structure of a rigid tube of a cleaning head of a surface cleaning device according to one embodiment of the present disclosure.

[0070] like Figure 9 and Figure 10 As shown, the cleaning assembly 680 includes a connector 682 for receiving cleaning liquid. Specifically, the connector 682 has an interface that allows fluid communication with the cleaning liquid storage unit 300. Additionally, a receiving space is provided on the rigid tube 671, and the connector 682 is sealed within this receiving space.

[0071] At this time, a fluid channel is formed between the connector 682 and the rigid tube 671. The fluid channel is connected not only to the interface but also to the nozzle 681. As a result, the liquid in the cleaning fluid storage unit 300 can be supplied to the nozzle 681 and sprayed out from the nozzle 681.

[0072] In one specific embodiment, both the connector 682 and the rigid tube 671 have half-tubes formed on them. The half-tubes of the connector 682 and the half-tubes of the rigid tube 671 are combined to form a pipeline for conveying cleaning liquid. This pipeline for conveying cleaning liquid can be connected to the nozzle 681. Thus, the half-tubes facilitate the processing of the connector 682 and the rigid tube 671.

[0073] Based on the above structure, in use, the surface cleaning device of this disclosure allows the cleaning liquid sprayed from the nozzle to directly wash the upper wall of the hose. Under the influence of gravity, this liquid flows downward along the inner wall of the hose, washing and cleaning the lower wall of the hose. Furthermore, during hose self-cleaning, cleaning liquid can also enter through the suction nozzle and clean the lower wall of the hose, thus ensuring the hose is thoroughly cleaned without leaving any residue.

[0074] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0076] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A cleaning head, characterized in that, include: case; A suction nozzle formed in the housing, wherein the suction nozzle defines the starting point of the liquid recovery path; A connecting tube assembly, one end of which is connected to the suction nozzle and defines a liquid recovery path; A cleaning assembly disposed on the connecting pipe assembly, the cleaning assembly being configured to receive cleaning liquid and, during self-cleaning of the connecting pipe assembly, provide the cleaning liquid to the inner wall of the connecting pipe assembly to impact and clean the inner wall of the connecting pipe assembly.

2. The cleaning head according to claim 1, characterized in that, The connecting pipe assembly includes a rigid pipe, and the cleaning assembly includes a nozzle disposed on the inner wall of the rigid pipe.

3. The cleaning head according to claim 2, characterized in that, The nozzle sprays the cleaning liquid in the same direction as the recycled liquid flowing inside the connecting pipe assembly; wherein, during the self-cleaning of the connecting pipe assembly, the cleaning liquid impacts the inner wall of the connecting pipe assembly in the direction of the recycled liquid's recovery.

4. The cleaning head according to claim 2, characterized in that, The connecting tube assembly also includes a flexible tube, one end of the rigid tube is connected to the suction nozzle, and the other end of the rigid tube is connected to one end of the flexible tube; wherein, the cleaning assembly is used to clean the flexible tube installed on the rigid tube.

5. The cleaning head according to claim 2, characterized in that, The nozzle is formed through a through hole formed on the rigid tube.

6. The cleaning head according to claim 2, characterized in that, The nozzles are configured as a plurality of nozzles, which are distributed approximately laterally on the inner wall of the upper part of the rigid tube.

7. The cleaning head according to claim 2, characterized in that, The nozzle outlet is substantially parallel to the axis of at least a segment of the rigid tube.

8. The cleaning head according to claim 2, characterized in that, The cleaning assembly includes a connector for receiving cleaning liquid, wherein the rigid tube has a receiving space, and the connector is sealed within the receiving space.

9. The cleaning head according to claim 8, characterized in that, A fluid channel is formed between the connector and the rigid tube, and the fluid channel is connected to the nozzle.

10. A surface cleaning device, characterized in that, The cleaning head includes any one of claims 1-9.

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